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Diffstat (limited to 'venv/lib/python3.11/site-packages/h11')
46 files changed, 5306 insertions, 0 deletions
diff --git a/venv/lib/python3.11/site-packages/h11/__init__.py b/venv/lib/python3.11/site-packages/h11/__init__.py new file mode 100644 index 0000000..989e92c --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/__init__.py @@ -0,0 +1,62 @@ +# A highish-level implementation of the HTTP/1.1 wire protocol (RFC 7230), +# containing no networking code at all, loosely modelled on hyper-h2's generic +# implementation of HTTP/2 (and in particular the h2.connection.H2Connection +# class). There's still a bunch of subtle details you need to get right if you +# want to make this actually useful, because it doesn't implement all the +# semantics to check that what you're asking to write to the wire is sensible, +# but at least it gets you out of dealing with the wire itself. + +from h11._connection import Connection, NEED_DATA, PAUSED +from h11._events import ( + ConnectionClosed, + Data, + EndOfMessage, + Event, + InformationalResponse, + Request, + Response, +) +from h11._state import ( + CLIENT, + CLOSED, + DONE, + ERROR, + IDLE, + MIGHT_SWITCH_PROTOCOL, + MUST_CLOSE, + SEND_BODY, + SEND_RESPONSE, + SERVER, + SWITCHED_PROTOCOL, +) +from h11._util import LocalProtocolError, ProtocolError, RemoteProtocolError +from h11._version import __version__ + +PRODUCT_ID = "python-h11/" + __version__ + + +__all__ = ( + "Connection", + "NEED_DATA", + "PAUSED", + "ConnectionClosed", + "Data", + "EndOfMessage", + "Event", + "InformationalResponse", + "Request", + "Response", + "CLIENT", + "CLOSED", + "DONE", + "ERROR", + "IDLE", + "MUST_CLOSE", + "SEND_BODY", + "SEND_RESPONSE", + "SERVER", + "SWITCHED_PROTOCOL", + "ProtocolError", + "LocalProtocolError", + "RemoteProtocolError", +) diff --git a/venv/lib/python3.11/site-packages/h11/__pycache__/__init__.cpython-311.pyc b/venv/lib/python3.11/site-packages/h11/__pycache__/__init__.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..76942e2 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/__pycache__/__init__.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/h11/__pycache__/_abnf.cpython-311.pyc b/venv/lib/python3.11/site-packages/h11/__pycache__/_abnf.cpython-311.pyc Binary files differnew file mode 100644 index 0000000..53e94a7 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/__pycache__/_abnf.cpython-311.pyc diff --git a/venv/lib/python3.11/site-packages/h11/__pycache__/_connection.cpython-311.pyc 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100644 index 0000000..933587f --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_abnf.py @@ -0,0 +1,132 @@ +# We use native strings for all the re patterns, to take advantage of string +# formatting, and then convert to bytestrings when compiling the final re +# objects. + +# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#whitespace +# OWS = *( SP / HTAB ) +# ; optional whitespace +OWS = r"[ \t]*" + +# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#rule.token.separators +# token = 1*tchar +# +# tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" +# / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~" +# / DIGIT / ALPHA +# ; any VCHAR, except delimiters +token = r"[-!#$%&'*+.^_`|~0-9a-zA-Z]+" + +# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#header.fields +# field-name = token +field_name = token + +# The standard says: +# +# field-value = *( field-content / obs-fold ) +# field-content = field-vchar [ 1*( SP / HTAB ) field-vchar ] +# field-vchar = VCHAR / obs-text +# obs-fold = CRLF 1*( SP / HTAB ) +# ; obsolete line folding +# ; see Section 3.2.4 +# +# https://tools.ietf.org/html/rfc5234#appendix-B.1 +# +# VCHAR = %x21-7E +# ; visible (printing) characters +# +# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#rule.quoted-string +# obs-text = %x80-FF +# +# However, the standard definition of field-content is WRONG! It disallows +# fields containing a single visible character surrounded by whitespace, +# e.g. "foo a bar". +# +# See: https://www.rfc-editor.org/errata_search.php?rfc=7230&eid=4189 +# +# So our definition of field_content attempts to fix it up... +# +# Also, we allow lots of control characters, because apparently people assume +# that they're legal in practice (e.g., google analytics makes cookies with +# \x01 in them!): +# https://github.com/python-hyper/h11/issues/57 +# We still don't allow NUL or whitespace, because those are often treated as +# meta-characters and letting them through can lead to nasty issues like SSRF. +vchar = r"[\x21-\x7e]" +vchar_or_obs_text = r"[^\x00\s]" +field_vchar = vchar_or_obs_text +field_content = r"{field_vchar}+(?:[ \t]+{field_vchar}+)*".format(**globals()) + +# We handle obs-fold at a different level, and our fixed-up field_content +# already grows to swallow the whole value, so ? instead of * +field_value = r"({field_content})?".format(**globals()) + +# header-field = field-name ":" OWS field-value OWS +header_field = ( + r"(?P<field_name>{field_name})" + r":" + r"{OWS}" + r"(?P<field_value>{field_value})" + r"{OWS}".format(**globals()) +) + +# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#request.line +# +# request-line = method SP request-target SP HTTP-version CRLF +# method = token +# HTTP-version = HTTP-name "/" DIGIT "." DIGIT +# HTTP-name = %x48.54.54.50 ; "HTTP", case-sensitive +# +# request-target is complicated (see RFC 7230 sec 5.3) -- could be path, full +# URL, host+port (for connect), or even "*", but in any case we are guaranteed +# that it contists of the visible printing characters. +method = token +request_target = r"{vchar}+".format(**globals()) +http_version = r"HTTP/(?P<http_version>[0-9]\.[0-9])" +request_line = ( + r"(?P<method>{method})" + r" " + r"(?P<target>{request_target})" + r" " + r"{http_version}".format(**globals()) +) + +# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#status.line +# +# status-line = HTTP-version SP status-code SP reason-phrase CRLF +# status-code = 3DIGIT +# reason-phrase = *( HTAB / SP / VCHAR / obs-text ) +status_code = r"[0-9]{3}" +reason_phrase = r"([ \t]|{vchar_or_obs_text})*".format(**globals()) +status_line = ( + r"{http_version}" + r" " + r"(?P<status_code>{status_code})" + # However, there are apparently a few too many servers out there that just + # leave out the reason phrase: + # https://github.com/scrapy/scrapy/issues/345#issuecomment-281756036 + # https://github.com/seanmonstar/httparse/issues/29 + # so make it optional. ?: is a non-capturing group. + r"(?: (?P<reason>{reason_phrase}))?".format(**globals()) +) + +HEXDIG = r"[0-9A-Fa-f]" +# Actually +# +# chunk-size = 1*HEXDIG +# +# but we impose an upper-limit to avoid ridiculosity. len(str(2**64)) == 20 +chunk_size = r"({HEXDIG}){{1,20}}".format(**globals()) +# Actually +# +# chunk-ext = *( ";" chunk-ext-name [ "=" chunk-ext-val ] ) +# +# but we aren't parsing the things so we don't really care. +chunk_ext = r";.*" +chunk_header = ( + r"(?P<chunk_size>{chunk_size})" + r"(?P<chunk_ext>{chunk_ext})?" + r"{OWS}\r\n".format( + **globals() + ) # Even though the specification does not allow for extra whitespaces, + # we are lenient with trailing whitespaces because some servers on the wild use it. +) diff --git a/venv/lib/python3.11/site-packages/h11/_connection.py b/venv/lib/python3.11/site-packages/h11/_connection.py new file mode 100644 index 0000000..d175270 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_connection.py @@ -0,0 +1,633 @@ +# This contains the main Connection class. Everything in h11 revolves around +# this. +from typing import Any, Callable, cast, Dict, List, Optional, Tuple, Type, Union + +from ._events import ( + ConnectionClosed, + Data, + EndOfMessage, + Event, + InformationalResponse, + Request, + Response, +) +from ._headers import get_comma_header, has_expect_100_continue, set_comma_header +from ._readers import READERS, ReadersType +from ._receivebuffer import ReceiveBuffer +from ._state import ( + _SWITCH_CONNECT, + _SWITCH_UPGRADE, + CLIENT, + ConnectionState, + DONE, + ERROR, + MIGHT_SWITCH_PROTOCOL, + SEND_BODY, + SERVER, + SWITCHED_PROTOCOL, +) +from ._util import ( # Import the internal things we need + LocalProtocolError, + RemoteProtocolError, + Sentinel, +) +from ._writers import WRITERS, WritersType + +# Everything in __all__ gets re-exported as part of the h11 public API. +__all__ = ["Connection", "NEED_DATA", "PAUSED"] + + +class NEED_DATA(Sentinel, metaclass=Sentinel): + pass + + +class PAUSED(Sentinel, metaclass=Sentinel): + pass + + +# If we ever have this much buffered without it making a complete parseable +# event, we error out. The only time we really buffer is when reading the +# request/response line + headers together, so this is effectively the limit on +# the size of that. +# +# Some precedents for defaults: +# - node.js: 80 * 1024 +# - tomcat: 8 * 1024 +# - IIS: 16 * 1024 +# - Apache: <8 KiB per line> +DEFAULT_MAX_INCOMPLETE_EVENT_SIZE = 16 * 1024 + +# RFC 7230's rules for connection lifecycles: +# - If either side says they want to close the connection, then the connection +# must close. +# - HTTP/1.1 defaults to keep-alive unless someone says Connection: close +# - HTTP/1.0 defaults to close unless both sides say Connection: keep-alive +# (and even this is a mess -- e.g. if you're implementing a proxy then +# sending Connection: keep-alive is forbidden). +# +# We simplify life by simply not supporting keep-alive with HTTP/1.0 peers. So +# our rule is: +# - If someone says Connection: close, we will close +# - If someone uses HTTP/1.0, we will close. +def _keep_alive(event: Union[Request, Response]) -> bool: + connection = get_comma_header(event.headers, b"connection") + if b"close" in connection: + return False + if getattr(event, "http_version", b"1.1") < b"1.1": + return False + return True + + +def _body_framing( + request_method: bytes, event: Union[Request, Response] +) -> Tuple[str, Union[Tuple[()], Tuple[int]]]: + # Called when we enter SEND_BODY to figure out framing information for + # this body. + # + # These are the only two events that can trigger a SEND_BODY state: + assert type(event) in (Request, Response) + # Returns one of: + # + # ("content-length", count) + # ("chunked", ()) + # ("http/1.0", ()) + # + # which are (lookup key, *args) for constructing body reader/writer + # objects. + # + # Reference: https://tools.ietf.org/html/rfc7230#section-3.3.3 + # + # Step 1: some responses always have an empty body, regardless of what the + # headers say. + if type(event) is Response: + if ( + event.status_code in (204, 304) + or request_method == b"HEAD" + or (request_method == b"CONNECT" and 200 <= event.status_code < 300) + ): + return ("content-length", (0,)) + # Section 3.3.3 also lists another case -- responses with status_code + # < 200. For us these are InformationalResponses, not Responses, so + # they can't get into this function in the first place. + assert event.status_code >= 200 + + # Step 2: check for Transfer-Encoding (T-E beats C-L): + transfer_encodings = get_comma_header(event.headers, b"transfer-encoding") + if transfer_encodings: + assert transfer_encodings == [b"chunked"] + return ("chunked", ()) + + # Step 3: check for Content-Length + content_lengths = get_comma_header(event.headers, b"content-length") + if content_lengths: + return ("content-length", (int(content_lengths[0]),)) + + # Step 4: no applicable headers; fallback/default depends on type + if type(event) is Request: + return ("content-length", (0,)) + else: + return ("http/1.0", ()) + + +################################################################ +# +# The main Connection class +# +################################################################ + + +class Connection: + """An object encapsulating the state of an HTTP connection. + + Args: + our_role: If you're implementing a client, pass :data:`h11.CLIENT`. If + you're implementing a server, pass :data:`h11.SERVER`. + + max_incomplete_event_size (int): + The maximum number of bytes we're willing to buffer of an + incomplete event. In practice this mostly sets a limit on the + maximum size of the request/response line + headers. If this is + exceeded, then :meth:`next_event` will raise + :exc:`RemoteProtocolError`. + + """ + + def __init__( + self, + our_role: Type[Sentinel], + max_incomplete_event_size: int = DEFAULT_MAX_INCOMPLETE_EVENT_SIZE, + ) -> None: + self._max_incomplete_event_size = max_incomplete_event_size + # State and role tracking + if our_role not in (CLIENT, SERVER): + raise ValueError("expected CLIENT or SERVER, not {!r}".format(our_role)) + self.our_role = our_role + self.their_role: Type[Sentinel] + if our_role is CLIENT: + self.their_role = SERVER + else: + self.their_role = CLIENT + self._cstate = ConnectionState() + + # Callables for converting data->events or vice-versa given the + # current state + self._writer = self._get_io_object(self.our_role, None, WRITERS) + self._reader = self._get_io_object(self.their_role, None, READERS) + + # Holds any unprocessed received data + self._receive_buffer = ReceiveBuffer() + # If this is true, then it indicates that the incoming connection was + # closed *after* the end of whatever's in self._receive_buffer: + self._receive_buffer_closed = False + + # Extra bits of state that don't fit into the state machine. + # + # These two are only used to interpret framing headers for figuring + # out how to read/write response bodies. their_http_version is also + # made available as a convenient public API. + self.their_http_version: Optional[bytes] = None + self._request_method: Optional[bytes] = None + # This is pure flow-control and doesn't at all affect the set of legal + # transitions, so no need to bother ConnectionState with it: + self.client_is_waiting_for_100_continue = False + + @property + def states(self) -> Dict[Type[Sentinel], Type[Sentinel]]: + """A dictionary like:: + + {CLIENT: <client state>, SERVER: <server state>} + + See :ref:`state-machine` for details. + + """ + return dict(self._cstate.states) + + @property + def our_state(self) -> Type[Sentinel]: + """The current state of whichever role we are playing. See + :ref:`state-machine` for details. + """ + return self._cstate.states[self.our_role] + + @property + def their_state(self) -> Type[Sentinel]: + """The current state of whichever role we are NOT playing. See + :ref:`state-machine` for details. + """ + return self._cstate.states[self.their_role] + + @property + def they_are_waiting_for_100_continue(self) -> bool: + return self.their_role is CLIENT and self.client_is_waiting_for_100_continue + + def start_next_cycle(self) -> None: + """Attempt to reset our connection state for a new request/response + cycle. + + If both client and server are in :data:`DONE` state, then resets them + both to :data:`IDLE` state in preparation for a new request/response + cycle on this same connection. Otherwise, raises a + :exc:`LocalProtocolError`. + + See :ref:`keepalive-and-pipelining`. + + """ + old_states = dict(self._cstate.states) + self._cstate.start_next_cycle() + self._request_method = None + # self.their_http_version gets left alone, since it presumably lasts + # beyond a single request/response cycle + assert not self.client_is_waiting_for_100_continue + self._respond_to_state_changes(old_states) + + def _process_error(self, role: Type[Sentinel]) -> None: + old_states = dict(self._cstate.states) + self._cstate.process_error(role) + self._respond_to_state_changes(old_states) + + def _server_switch_event(self, event: Event) -> Optional[Type[Sentinel]]: + if type(event) is InformationalResponse and event.status_code == 101: + return _SWITCH_UPGRADE + if type(event) is Response: + if ( + _SWITCH_CONNECT in self._cstate.pending_switch_proposals + and 200 <= event.status_code < 300 + ): + return _SWITCH_CONNECT + return None + + # All events go through here + def _process_event(self, role: Type[Sentinel], event: Event) -> None: + # First, pass the event through the state machine to make sure it + # succeeds. + old_states = dict(self._cstate.states) + if role is CLIENT and type(event) is Request: + if event.method == b"CONNECT": + self._cstate.process_client_switch_proposal(_SWITCH_CONNECT) + if get_comma_header(event.headers, b"upgrade"): + self._cstate.process_client_switch_proposal(_SWITCH_UPGRADE) + server_switch_event = None + if role is SERVER: + server_switch_event = self._server_switch_event(event) + self._cstate.process_event(role, type(event), server_switch_event) + + # Then perform the updates triggered by it. + + if type(event) is Request: + self._request_method = event.method + + if role is self.their_role and type(event) in ( + Request, + Response, + InformationalResponse, + ): + event = cast(Union[Request, Response, InformationalResponse], event) + self.their_http_version = event.http_version + + # Keep alive handling + # + # RFC 7230 doesn't really say what one should do if Connection: close + # shows up on a 1xx InformationalResponse. I think the idea is that + # this is not supposed to happen. In any case, if it does happen, we + # ignore it. + if type(event) in (Request, Response) and not _keep_alive( + cast(Union[Request, Response], event) + ): + self._cstate.process_keep_alive_disabled() + + # 100-continue + if type(event) is Request and has_expect_100_continue(event): + self.client_is_waiting_for_100_continue = True + if type(event) in (InformationalResponse, Response): + self.client_is_waiting_for_100_continue = False + if role is CLIENT and type(event) in (Data, EndOfMessage): + self.client_is_waiting_for_100_continue = False + + self._respond_to_state_changes(old_states, event) + + def _get_io_object( + self, + role: Type[Sentinel], + event: Optional[Event], + io_dict: Union[ReadersType, WritersType], + ) -> Optional[Callable[..., Any]]: + # event may be None; it's only used when entering SEND_BODY + state = self._cstate.states[role] + if state is SEND_BODY: + # Special case: the io_dict has a dict of reader/writer factories + # that depend on the request/response framing. + framing_type, args = _body_framing( + cast(bytes, self._request_method), cast(Union[Request, Response], event) + ) + return io_dict[SEND_BODY][framing_type](*args) # type: ignore[index] + else: + # General case: the io_dict just has the appropriate reader/writer + # for this state + return io_dict.get((role, state)) # type: ignore[return-value] + + # This must be called after any action that might have caused + # self._cstate.states to change. + def _respond_to_state_changes( + self, + old_states: Dict[Type[Sentinel], Type[Sentinel]], + event: Optional[Event] = None, + ) -> None: + # Update reader/writer + if self.our_state != old_states[self.our_role]: + self._writer = self._get_io_object(self.our_role, event, WRITERS) + if self.their_state != old_states[self.their_role]: + self._reader = self._get_io_object(self.their_role, event, READERS) + + @property + def trailing_data(self) -> Tuple[bytes, bool]: + """Data that has been received, but not yet processed, represented as + a tuple with two elements, where the first is a byte-string containing + the unprocessed data itself, and the second is a bool that is True if + the receive connection was closed. + + See :ref:`switching-protocols` for discussion of why you'd want this. + """ + return (bytes(self._receive_buffer), self._receive_buffer_closed) + + def receive_data(self, data: bytes) -> None: + """Add data to our internal receive buffer. + + This does not actually do any processing on the data, just stores + it. To trigger processing, you have to call :meth:`next_event`. + + Args: + data (:term:`bytes-like object`): + The new data that was just received. + + Special case: If *data* is an empty byte-string like ``b""``, + then this indicates that the remote side has closed the + connection (end of file). Normally this is convenient, because + standard Python APIs like :meth:`file.read` or + :meth:`socket.recv` use ``b""`` to indicate end-of-file, while + other failures to read are indicated using other mechanisms + like raising :exc:`TimeoutError`. When using such an API you + can just blindly pass through whatever you get from ``read`` + to :meth:`receive_data`, and everything will work. + + But, if you have an API where reading an empty string is a + valid non-EOF condition, then you need to be aware of this and + make sure to check for such strings and avoid passing them to + :meth:`receive_data`. + + Returns: + Nothing, but after calling this you should call :meth:`next_event` + to parse the newly received data. + + Raises: + RuntimeError: + Raised if you pass an empty *data*, indicating EOF, and then + pass a non-empty *data*, indicating more data that somehow + arrived after the EOF. + + (Calling ``receive_data(b"")`` multiple times is fine, + and equivalent to calling it once.) + + """ + if data: + if self._receive_buffer_closed: + raise RuntimeError("received close, then received more data?") + self._receive_buffer += data + else: + self._receive_buffer_closed = True + + def _extract_next_receive_event( + self, + ) -> Union[Event, Type[NEED_DATA], Type[PAUSED]]: + state = self.their_state + # We don't pause immediately when they enter DONE, because even in + # DONE state we can still process a ConnectionClosed() event. But + # if we have data in our buffer, then we definitely aren't getting + # a ConnectionClosed() immediately and we need to pause. + if state is DONE and self._receive_buffer: + return PAUSED + if state is MIGHT_SWITCH_PROTOCOL or state is SWITCHED_PROTOCOL: + return PAUSED + assert self._reader is not None + event = self._reader(self._receive_buffer) + if event is None: + if not self._receive_buffer and self._receive_buffer_closed: + # In some unusual cases (basically just HTTP/1.0 bodies), EOF + # triggers an actual protocol event; in that case, we want to + # return that event, and then the state will change and we'll + # get called again to generate the actual ConnectionClosed(). + if hasattr(self._reader, "read_eof"): + event = self._reader.read_eof() # type: ignore[attr-defined] + else: + event = ConnectionClosed() + if event is None: + event = NEED_DATA + return event # type: ignore[no-any-return] + + def next_event(self) -> Union[Event, Type[NEED_DATA], Type[PAUSED]]: + """Parse the next event out of our receive buffer, update our internal + state, and return it. + + This is a mutating operation -- think of it like calling :func:`next` + on an iterator. + + Returns: + : One of three things: + + 1) An event object -- see :ref:`events`. + + 2) The special constant :data:`NEED_DATA`, which indicates that + you need to read more data from your socket and pass it to + :meth:`receive_data` before this method will be able to return + any more events. + + 3) The special constant :data:`PAUSED`, which indicates that we + are not in a state where we can process incoming data (usually + because the peer has finished their part of the current + request/response cycle, and you have not yet called + :meth:`start_next_cycle`). See :ref:`flow-control` for details. + + Raises: + RemoteProtocolError: + The peer has misbehaved. You should close the connection + (possibly after sending some kind of 4xx response). + + Once this method returns :class:`ConnectionClosed` once, then all + subsequent calls will also return :class:`ConnectionClosed`. + + If this method raises any exception besides :exc:`RemoteProtocolError` + then that's a bug -- if it happens please file a bug report! + + If this method raises any exception then it also sets + :attr:`Connection.their_state` to :data:`ERROR` -- see + :ref:`error-handling` for discussion. + + """ + + if self.their_state is ERROR: + raise RemoteProtocolError("Can't receive data when peer state is ERROR") + try: + event = self._extract_next_receive_event() + if event not in [NEED_DATA, PAUSED]: + self._process_event(self.their_role, cast(Event, event)) + if event is NEED_DATA: + if len(self._receive_buffer) > self._max_incomplete_event_size: + # 431 is "Request header fields too large" which is pretty + # much the only situation where we can get here + raise RemoteProtocolError( + "Receive buffer too long", error_status_hint=431 + ) + if self._receive_buffer_closed: + # We're still trying to complete some event, but that's + # never going to happen because no more data is coming + raise RemoteProtocolError("peer unexpectedly closed connection") + return event + except BaseException as exc: + self._process_error(self.their_role) + if isinstance(exc, LocalProtocolError): + exc._reraise_as_remote_protocol_error() + else: + raise + + def send(self, event: Event) -> Optional[bytes]: + """Convert a high-level event into bytes that can be sent to the peer, + while updating our internal state machine. + + Args: + event: The :ref:`event <events>` to send. + + Returns: + If ``type(event) is ConnectionClosed``, then returns + ``None``. Otherwise, returns a :term:`bytes-like object`. + + Raises: + LocalProtocolError: + Sending this event at this time would violate our + understanding of the HTTP/1.1 protocol. + + If this method raises any exception then it also sets + :attr:`Connection.our_state` to :data:`ERROR` -- see + :ref:`error-handling` for discussion. + + """ + data_list = self.send_with_data_passthrough(event) + if data_list is None: + return None + else: + return b"".join(data_list) + + def send_with_data_passthrough(self, event: Event) -> Optional[List[bytes]]: + """Identical to :meth:`send`, except that in situations where + :meth:`send` returns a single :term:`bytes-like object`, this instead + returns a list of them -- and when sending a :class:`Data` event, this + list is guaranteed to contain the exact object you passed in as + :attr:`Data.data`. See :ref:`sendfile` for discussion. + + """ + if self.our_state is ERROR: + raise LocalProtocolError("Can't send data when our state is ERROR") + try: + if type(event) is Response: + event = self._clean_up_response_headers_for_sending(event) + # We want to call _process_event before calling the writer, + # because if someone tries to do something invalid then this will + # give a sensible error message, while our writers all just assume + # they will only receive valid events. But, _process_event might + # change self._writer. So we have to do a little dance: + writer = self._writer + self._process_event(self.our_role, event) + if type(event) is ConnectionClosed: + return None + else: + # In any situation where writer is None, process_event should + # have raised ProtocolError + assert writer is not None + data_list: List[bytes] = [] + writer(event, data_list.append) + return data_list + except: + self._process_error(self.our_role) + raise + + def send_failed(self) -> None: + """Notify the state machine that we failed to send the data it gave + us. + + This causes :attr:`Connection.our_state` to immediately become + :data:`ERROR` -- see :ref:`error-handling` for discussion. + + """ + self._process_error(self.our_role) + + # When sending a Response, we take responsibility for a few things: + # + # - Sometimes you MUST set Connection: close. We take care of those + # times. (You can also set it yourself if you want, and if you do then + # we'll respect that and close the connection at the right time. But you + # don't have to worry about that unless you want to.) + # + # - The user has to set Content-Length if they want it. Otherwise, for + # responses that have bodies (e.g. not HEAD), then we will automatically + # select the right mechanism for streaming a body of unknown length, + # which depends on depending on the peer's HTTP version. + # + # This function's *only* responsibility is making sure headers are set up + # right -- everything downstream just looks at the headers. There are no + # side channels. + def _clean_up_response_headers_for_sending(self, response: Response) -> Response: + assert type(response) is Response + + headers = response.headers + need_close = False + + # HEAD requests need some special handling: they always act like they + # have Content-Length: 0, and that's how _body_framing treats + # them. But their headers are supposed to match what we would send if + # the request was a GET. (Technically there is one deviation allowed: + # we're allowed to leave out the framing headers -- see + # https://tools.ietf.org/html/rfc7231#section-4.3.2 . But it's just as + # easy to get them right.) + method_for_choosing_headers = cast(bytes, self._request_method) + if method_for_choosing_headers == b"HEAD": + method_for_choosing_headers = b"GET" + framing_type, _ = _body_framing(method_for_choosing_headers, response) + if framing_type in ("chunked", "http/1.0"): + # This response has a body of unknown length. + # If our peer is HTTP/1.1, we use Transfer-Encoding: chunked + # If our peer is HTTP/1.0, we use no framing headers, and close the + # connection afterwards. + # + # Make sure to clear Content-Length (in principle user could have + # set both and then we ignored Content-Length b/c + # Transfer-Encoding overwrote it -- this would be naughty of them, + # but the HTTP spec says that if our peer does this then we have + # to fix it instead of erroring out, so we'll accord the user the + # same respect). + headers = set_comma_header(headers, b"content-length", []) + if self.their_http_version is None or self.their_http_version < b"1.1": + # Either we never got a valid request and are sending back an + # error (their_http_version is None), so we assume the worst; + # or else we did get a valid HTTP/1.0 request, so we know that + # they don't understand chunked encoding. + headers = set_comma_header(headers, b"transfer-encoding", []) + # This is actually redundant ATM, since currently we + # unconditionally disable keep-alive when talking to HTTP/1.0 + # peers. But let's be defensive just in case we add + # Connection: keep-alive support later: + if self._request_method != b"HEAD": + need_close = True + else: + headers = set_comma_header(headers, b"transfer-encoding", [b"chunked"]) + + if not self._cstate.keep_alive or need_close: + # Make sure Connection: close is set + connection = set(get_comma_header(headers, b"connection")) + connection.discard(b"keep-alive") + connection.add(b"close") + headers = set_comma_header(headers, b"connection", sorted(connection)) + + return Response( + headers=headers, + status_code=response.status_code, + http_version=response.http_version, + reason=response.reason, + ) diff --git a/venv/lib/python3.11/site-packages/h11/_events.py b/venv/lib/python3.11/site-packages/h11/_events.py new file mode 100644 index 0000000..075bf8a --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_events.py @@ -0,0 +1,369 @@ +# High level events that make up HTTP/1.1 conversations. Loosely inspired by +# the corresponding events in hyper-h2: +# +# http://python-hyper.org/h2/en/stable/api.html#events +# +# Don't subclass these. Stuff will break. + +import re +from abc import ABC +from dataclasses import dataclass, field +from typing import Any, cast, Dict, List, Tuple, Union + +from ._abnf import method, request_target +from ._headers import Headers, normalize_and_validate +from ._util import bytesify, LocalProtocolError, validate + +# Everything in __all__ gets re-exported as part of the h11 public API. +__all__ = [ + "Event", + "Request", + "InformationalResponse", + "Response", + "Data", + "EndOfMessage", + "ConnectionClosed", +] + +method_re = re.compile(method.encode("ascii")) +request_target_re = re.compile(request_target.encode("ascii")) + + +class Event(ABC): + """ + Base class for h11 events. + """ + + __slots__ = () + + +@dataclass(init=False, frozen=True) +class Request(Event): + """The beginning of an HTTP request. + + Fields: + + .. attribute:: method + + An HTTP method, e.g. ``b"GET"`` or ``b"POST"``. Always a byte + string. :term:`Bytes-like objects <bytes-like object>` and native + strings containing only ascii characters will be automatically + converted to byte strings. + + .. attribute:: target + + The target of an HTTP request, e.g. ``b"/index.html"``, or one of the + more exotic formats described in `RFC 7320, section 5.3 + <https://tools.ietf.org/html/rfc7230#section-5.3>`_. Always a byte + string. :term:`Bytes-like objects <bytes-like object>` and native + strings containing only ascii characters will be automatically + converted to byte strings. + + .. attribute:: headers + + Request headers, represented as a list of (name, value) pairs. See + :ref:`the header normalization rules <headers-format>` for details. + + .. attribute:: http_version + + The HTTP protocol version, represented as a byte string like + ``b"1.1"``. See :ref:`the HTTP version normalization rules + <http_version-format>` for details. + + """ + + __slots__ = ("method", "headers", "target", "http_version") + + method: bytes + headers: Headers + target: bytes + http_version: bytes + + def __init__( + self, + *, + method: Union[bytes, str], + headers: Union[Headers, List[Tuple[bytes, bytes]], List[Tuple[str, str]]], + target: Union[bytes, str], + http_version: Union[bytes, str] = b"1.1", + _parsed: bool = False, + ) -> None: + super().__init__() + if isinstance(headers, Headers): + object.__setattr__(self, "headers", headers) + else: + object.__setattr__( + self, "headers", normalize_and_validate(headers, _parsed=_parsed) + ) + if not _parsed: + object.__setattr__(self, "method", bytesify(method)) + object.__setattr__(self, "target", bytesify(target)) + object.__setattr__(self, "http_version", bytesify(http_version)) + else: + object.__setattr__(self, "method", method) + object.__setattr__(self, "target", target) + object.__setattr__(self, "http_version", http_version) + + # "A server MUST respond with a 400 (Bad Request) status code to any + # HTTP/1.1 request message that lacks a Host header field and to any + # request message that contains more than one Host header field or a + # Host header field with an invalid field-value." + # -- https://tools.ietf.org/html/rfc7230#section-5.4 + host_count = 0 + for name, value in self.headers: + if name == b"host": + host_count += 1 + if self.http_version == b"1.1" and host_count == 0: + raise LocalProtocolError("Missing mandatory Host: header") + if host_count > 1: + raise LocalProtocolError("Found multiple Host: headers") + + validate(method_re, self.method, "Illegal method characters") + validate(request_target_re, self.target, "Illegal target characters") + + # This is an unhashable type. + __hash__ = None # type: ignore + + +@dataclass(init=False, frozen=True) +class _ResponseBase(Event): + __slots__ = ("headers", "http_version", "reason", "status_code") + + headers: Headers + http_version: bytes + reason: bytes + status_code: int + + def __init__( + self, + *, + headers: Union[Headers, List[Tuple[bytes, bytes]], List[Tuple[str, str]]], + status_code: int, + http_version: Union[bytes, str] = b"1.1", + reason: Union[bytes, str] = b"", + _parsed: bool = False, + ) -> None: + super().__init__() + if isinstance(headers, Headers): + object.__setattr__(self, "headers", headers) + else: + object.__setattr__( + self, "headers", normalize_and_validate(headers, _parsed=_parsed) + ) + if not _parsed: + object.__setattr__(self, "reason", bytesify(reason)) + object.__setattr__(self, "http_version", bytesify(http_version)) + if not isinstance(status_code, int): + raise LocalProtocolError("status code must be integer") + # Because IntEnum objects are instances of int, but aren't + # duck-compatible (sigh), see gh-72. + object.__setattr__(self, "status_code", int(status_code)) + else: + object.__setattr__(self, "reason", reason) + object.__setattr__(self, "http_version", http_version) + object.__setattr__(self, "status_code", status_code) + + self.__post_init__() + + def __post_init__(self) -> None: + pass + + # This is an unhashable type. + __hash__ = None # type: ignore + + +@dataclass(init=False, frozen=True) +class InformationalResponse(_ResponseBase): + """An HTTP informational response. + + Fields: + + .. attribute:: status_code + + The status code of this response, as an integer. For an + :class:`InformationalResponse`, this is always in the range [100, + 200). + + .. attribute:: headers + + Request headers, represented as a list of (name, value) pairs. See + :ref:`the header normalization rules <headers-format>` for + details. + + .. attribute:: http_version + + The HTTP protocol version, represented as a byte string like + ``b"1.1"``. See :ref:`the HTTP version normalization rules + <http_version-format>` for details. + + .. attribute:: reason + + The reason phrase of this response, as a byte string. For example: + ``b"OK"``, or ``b"Not Found"``. + + """ + + def __post_init__(self) -> None: + if not (100 <= self.status_code < 200): + raise LocalProtocolError( + "InformationalResponse status_code should be in range " + "[100, 200), not {}".format(self.status_code) + ) + + # This is an unhashable type. + __hash__ = None # type: ignore + + +@dataclass(init=False, frozen=True) +class Response(_ResponseBase): + """The beginning of an HTTP response. + + Fields: + + .. attribute:: status_code + + The status code of this response, as an integer. For an + :class:`Response`, this is always in the range [200, + 1000). + + .. attribute:: headers + + Request headers, represented as a list of (name, value) pairs. See + :ref:`the header normalization rules <headers-format>` for details. + + .. attribute:: http_version + + The HTTP protocol version, represented as a byte string like + ``b"1.1"``. See :ref:`the HTTP version normalization rules + <http_version-format>` for details. + + .. attribute:: reason + + The reason phrase of this response, as a byte string. For example: + ``b"OK"``, or ``b"Not Found"``. + + """ + + def __post_init__(self) -> None: + if not (200 <= self.status_code < 1000): + raise LocalProtocolError( + "Response status_code should be in range [200, 1000), not {}".format( + self.status_code + ) + ) + + # This is an unhashable type. + __hash__ = None # type: ignore + + +@dataclass(init=False, frozen=True) +class Data(Event): + """Part of an HTTP message body. + + Fields: + + .. attribute:: data + + A :term:`bytes-like object` containing part of a message body. Or, if + using the ``combine=False`` argument to :meth:`Connection.send`, then + any object that your socket writing code knows what to do with, and for + which calling :func:`len` returns the number of bytes that will be + written -- see :ref:`sendfile` for details. + + .. attribute:: chunk_start + + A marker that indicates whether this data object is from the start of a + chunked transfer encoding chunk. This field is ignored when when a Data + event is provided to :meth:`Connection.send`: it is only valid on + events emitted from :meth:`Connection.next_event`. You probably + shouldn't use this attribute at all; see + :ref:`chunk-delimiters-are-bad` for details. + + .. attribute:: chunk_end + + A marker that indicates whether this data object is the last for a + given chunked transfer encoding chunk. This field is ignored when when + a Data event is provided to :meth:`Connection.send`: it is only valid + on events emitted from :meth:`Connection.next_event`. You probably + shouldn't use this attribute at all; see + :ref:`chunk-delimiters-are-bad` for details. + + """ + + __slots__ = ("data", "chunk_start", "chunk_end") + + data: bytes + chunk_start: bool + chunk_end: bool + + def __init__( + self, data: bytes, chunk_start: bool = False, chunk_end: bool = False + ) -> None: + object.__setattr__(self, "data", data) + object.__setattr__(self, "chunk_start", chunk_start) + object.__setattr__(self, "chunk_end", chunk_end) + + # This is an unhashable type. + __hash__ = None # type: ignore + + +# XX FIXME: "A recipient MUST ignore (or consider as an error) any fields that +# are forbidden to be sent in a trailer, since processing them as if they were +# present in the header section might bypass external security filters." +# https://svn.tools.ietf.org/svn/wg/httpbis/specs/rfc7230.html#chunked.trailer.part +# Unfortunately, the list of forbidden fields is long and vague :-/ +@dataclass(init=False, frozen=True) +class EndOfMessage(Event): + """The end of an HTTP message. + + Fields: + + .. attribute:: headers + + Default value: ``[]`` + + Any trailing headers attached to this message, represented as a list of + (name, value) pairs. See :ref:`the header normalization rules + <headers-format>` for details. + + Must be empty unless ``Transfer-Encoding: chunked`` is in use. + + """ + + __slots__ = ("headers",) + + headers: Headers + + def __init__( + self, + *, + headers: Union[ + Headers, List[Tuple[bytes, bytes]], List[Tuple[str, str]], None + ] = None, + _parsed: bool = False, + ) -> None: + super().__init__() + if headers is None: + headers = Headers([]) + elif not isinstance(headers, Headers): + headers = normalize_and_validate(headers, _parsed=_parsed) + + object.__setattr__(self, "headers", headers) + + # This is an unhashable type. + __hash__ = None # type: ignore + + +@dataclass(frozen=True) +class ConnectionClosed(Event): + """This event indicates that the sender has closed their outgoing + connection. + + Note that this does not necessarily mean that they can't *receive* further + data, because TCP connections are composed to two one-way channels which + can be closed independently. See :ref:`closing` for details. + + No fields. + """ + + pass diff --git a/venv/lib/python3.11/site-packages/h11/_headers.py b/venv/lib/python3.11/site-packages/h11/_headers.py new file mode 100644 index 0000000..b97d020 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_headers.py @@ -0,0 +1,278 @@ +import re +from typing import AnyStr, cast, List, overload, Sequence, Tuple, TYPE_CHECKING, Union + +from ._abnf import field_name, field_value +from ._util import bytesify, LocalProtocolError, validate + +if TYPE_CHECKING: + from ._events import Request + +try: + from typing import Literal +except ImportError: + from typing_extensions import Literal # type: ignore + + +# Facts +# ----- +# +# Headers are: +# keys: case-insensitive ascii +# values: mixture of ascii and raw bytes +# +# "Historically, HTTP has allowed field content with text in the ISO-8859-1 +# charset [ISO-8859-1], supporting other charsets only through use of +# [RFC2047] encoding. In practice, most HTTP header field values use only a +# subset of the US-ASCII charset [USASCII]. Newly defined header fields SHOULD +# limit their field values to US-ASCII octets. A recipient SHOULD treat other +# octets in field content (obs-text) as opaque data." +# And it deprecates all non-ascii values +# +# Leading/trailing whitespace in header names is forbidden +# +# Values get leading/trailing whitespace stripped +# +# Content-Disposition actually needs to contain unicode semantically; to +# accomplish this it has a terrifically weird way of encoding the filename +# itself as ascii (and even this still has lots of cross-browser +# incompatibilities) +# +# Order is important: +# "a proxy MUST NOT change the order of these field values when forwarding a +# message" +# (and there are several headers where the order indicates a preference) +# +# Multiple occurences of the same header: +# "A sender MUST NOT generate multiple header fields with the same field name +# in a message unless either the entire field value for that header field is +# defined as a comma-separated list [or the header is Set-Cookie which gets a +# special exception]" - RFC 7230. (cookies are in RFC 6265) +# +# So every header aside from Set-Cookie can be merged by b", ".join if it +# occurs repeatedly. But, of course, they can't necessarily be split by +# .split(b","), because quoting. +# +# Given all this mess (case insensitive, duplicates allowed, order is +# important, ...), there doesn't appear to be any standard way to handle +# headers in Python -- they're almost like dicts, but... actually just +# aren't. For now we punt and just use a super simple representation: headers +# are a list of pairs +# +# [(name1, value1), (name2, value2), ...] +# +# where all entries are bytestrings, names are lowercase and have no +# leading/trailing whitespace, and values are bytestrings with no +# leading/trailing whitespace. Searching and updating are done via naive O(n) +# methods. +# +# Maybe a dict-of-lists would be better? + +_content_length_re = re.compile(rb"[0-9]+") +_field_name_re = re.compile(field_name.encode("ascii")) +_field_value_re = re.compile(field_value.encode("ascii")) + + +class Headers(Sequence[Tuple[bytes, bytes]]): + """ + A list-like interface that allows iterating over headers as byte-pairs + of (lowercased-name, value). + + Internally we actually store the representation as three-tuples, + including both the raw original casing, in order to preserve casing + over-the-wire, and the lowercased name, for case-insensitive comparisions. + + r = Request( + method="GET", + target="/", + headers=[("Host", "example.org"), ("Connection", "keep-alive")], + http_version="1.1", + ) + assert r.headers == [ + (b"host", b"example.org"), + (b"connection", b"keep-alive") + ] + assert r.headers.raw_items() == [ + (b"Host", b"example.org"), + (b"Connection", b"keep-alive") + ] + """ + + __slots__ = "_full_items" + + def __init__(self, full_items: List[Tuple[bytes, bytes, bytes]]) -> None: + self._full_items = full_items + + def __bool__(self) -> bool: + return bool(self._full_items) + + def __eq__(self, other: object) -> bool: + return list(self) == list(other) # type: ignore + + def __len__(self) -> int: + return len(self._full_items) + + def __repr__(self) -> str: + return "<Headers(%s)>" % repr(list(self)) + + def __getitem__(self, idx: int) -> Tuple[bytes, bytes]: # type: ignore[override] + _, name, value = self._full_items[idx] + return (name, value) + + def raw_items(self) -> List[Tuple[bytes, bytes]]: + return [(raw_name, value) for raw_name, _, value in self._full_items] + + +HeaderTypes = Union[ + List[Tuple[bytes, bytes]], + List[Tuple[bytes, str]], + List[Tuple[str, bytes]], + List[Tuple[str, str]], +] + + +@overload +def normalize_and_validate(headers: Headers, _parsed: Literal[True]) -> Headers: + ... + + +@overload +def normalize_and_validate(headers: HeaderTypes, _parsed: Literal[False]) -> Headers: + ... + + +@overload +def normalize_and_validate( + headers: Union[Headers, HeaderTypes], _parsed: bool = False +) -> Headers: + ... + + +def normalize_and_validate( + headers: Union[Headers, HeaderTypes], _parsed: bool = False +) -> Headers: + new_headers = [] + seen_content_length = None + saw_transfer_encoding = False + for name, value in headers: + # For headers coming out of the parser, we can safely skip some steps, + # because it always returns bytes and has already run these regexes + # over the data: + if not _parsed: + name = bytesify(name) + value = bytesify(value) + validate(_field_name_re, name, "Illegal header name {!r}", name) + validate(_field_value_re, value, "Illegal header value {!r}", value) + assert isinstance(name, bytes) + assert isinstance(value, bytes) + + raw_name = name + name = name.lower() + if name == b"content-length": + lengths = {length.strip() for length in value.split(b",")} + if len(lengths) != 1: + raise LocalProtocolError("conflicting Content-Length headers") + value = lengths.pop() + validate(_content_length_re, value, "bad Content-Length") + if seen_content_length is None: + seen_content_length = value + new_headers.append((raw_name, name, value)) + elif seen_content_length != value: + raise LocalProtocolError("conflicting Content-Length headers") + elif name == b"transfer-encoding": + # "A server that receives a request message with a transfer coding + # it does not understand SHOULD respond with 501 (Not + # Implemented)." + # https://tools.ietf.org/html/rfc7230#section-3.3.1 + if saw_transfer_encoding: + raise LocalProtocolError( + "multiple Transfer-Encoding headers", error_status_hint=501 + ) + # "All transfer-coding names are case-insensitive" + # -- https://tools.ietf.org/html/rfc7230#section-4 + value = value.lower() + if value != b"chunked": + raise LocalProtocolError( + "Only Transfer-Encoding: chunked is supported", + error_status_hint=501, + ) + saw_transfer_encoding = True + new_headers.append((raw_name, name, value)) + else: + new_headers.append((raw_name, name, value)) + return Headers(new_headers) + + +def get_comma_header(headers: Headers, name: bytes) -> List[bytes]: + # Should only be used for headers whose value is a list of + # comma-separated, case-insensitive values. + # + # The header name `name` is expected to be lower-case bytes. + # + # Connection: meets these criteria (including cast insensitivity). + # + # Content-Length: technically is just a single value (1*DIGIT), but the + # standard makes reference to implementations that do multiple values, and + # using this doesn't hurt. Ditto, case insensitivity doesn't things either + # way. + # + # Transfer-Encoding: is more complex (allows for quoted strings), so + # splitting on , is actually wrong. For example, this is legal: + # + # Transfer-Encoding: foo; options="1,2", chunked + # + # and should be parsed as + # + # foo; options="1,2" + # chunked + # + # but this naive function will parse it as + # + # foo; options="1 + # 2" + # chunked + # + # However, this is okay because the only thing we are going to do with + # any Transfer-Encoding is reject ones that aren't just "chunked", so + # both of these will be treated the same anyway. + # + # Expect: the only legal value is the literal string + # "100-continue". Splitting on commas is harmless. Case insensitive. + # + out: List[bytes] = [] + for _, found_name, found_raw_value in headers._full_items: + if found_name == name: + found_raw_value = found_raw_value.lower() + for found_split_value in found_raw_value.split(b","): + found_split_value = found_split_value.strip() + if found_split_value: + out.append(found_split_value) + return out + + +def set_comma_header(headers: Headers, name: bytes, new_values: List[bytes]) -> Headers: + # The header name `name` is expected to be lower-case bytes. + # + # Note that when we store the header we use title casing for the header + # names, in order to match the conventional HTTP header style. + # + # Simply calling `.title()` is a blunt approach, but it's correct + # here given the cases where we're using `set_comma_header`... + # + # Connection, Content-Length, Transfer-Encoding. + new_headers: List[Tuple[bytes, bytes]] = [] + for found_raw_name, found_name, found_raw_value in headers._full_items: + if found_name != name: + new_headers.append((found_raw_name, found_raw_value)) + for new_value in new_values: + new_headers.append((name.title(), new_value)) + return normalize_and_validate(new_headers) + + +def has_expect_100_continue(request: "Request") -> bool: + # https://tools.ietf.org/html/rfc7231#section-5.1.1 + # "A server that receives a 100-continue expectation in an HTTP/1.0 request + # MUST ignore that expectation." + if request.http_version < b"1.1": + return False + expect = get_comma_header(request.headers, b"expect") + return b"100-continue" in expect diff --git a/venv/lib/python3.11/site-packages/h11/_readers.py b/venv/lib/python3.11/site-packages/h11/_readers.py new file mode 100644 index 0000000..08a9574 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_readers.py @@ -0,0 +1,247 @@ +# Code to read HTTP data +# +# Strategy: each reader is a callable which takes a ReceiveBuffer object, and +# either: +# 1) consumes some of it and returns an Event +# 2) raises a LocalProtocolError (for consistency -- e.g. we call validate() +# and it might raise a LocalProtocolError, so simpler just to always use +# this) +# 3) returns None, meaning "I need more data" +# +# If they have a .read_eof attribute, then this will be called if an EOF is +# received -- but this is optional. Either way, the actual ConnectionClosed +# event will be generated afterwards. +# +# READERS is a dict describing how to pick a reader. It maps states to either: +# - a reader +# - or, for body readers, a dict of per-framing reader factories + +import re +from typing import Any, Callable, Dict, Iterable, NoReturn, Optional, Tuple, Type, Union + +from ._abnf import chunk_header, header_field, request_line, status_line +from ._events import Data, EndOfMessage, InformationalResponse, Request, Response +from ._receivebuffer import ReceiveBuffer +from ._state import ( + CLIENT, + CLOSED, + DONE, + IDLE, + MUST_CLOSE, + SEND_BODY, + SEND_RESPONSE, + SERVER, +) +from ._util import LocalProtocolError, RemoteProtocolError, Sentinel, validate + +__all__ = ["READERS"] + +header_field_re = re.compile(header_field.encode("ascii")) +obs_fold_re = re.compile(rb"[ \t]+") + + +def _obsolete_line_fold(lines: Iterable[bytes]) -> Iterable[bytes]: + it = iter(lines) + last: Optional[bytes] = None + for line in it: + match = obs_fold_re.match(line) + if match: + if last is None: + raise LocalProtocolError("continuation line at start of headers") + if not isinstance(last, bytearray): + # Cast to a mutable type, avoiding copy on append to ensure O(n) time + last = bytearray(last) + last += b" " + last += line[match.end() :] + else: + if last is not None: + yield last + last = line + if last is not None: + yield last + + +def _decode_header_lines( + lines: Iterable[bytes], +) -> Iterable[Tuple[bytes, bytes]]: + for line in _obsolete_line_fold(lines): + matches = validate(header_field_re, line, "illegal header line: {!r}", line) + yield (matches["field_name"], matches["field_value"]) + + +request_line_re = re.compile(request_line.encode("ascii")) + + +def maybe_read_from_IDLE_client(buf: ReceiveBuffer) -> Optional[Request]: + lines = buf.maybe_extract_lines() + if lines is None: + if buf.is_next_line_obviously_invalid_request_line(): + raise LocalProtocolError("illegal request line") + return None + if not lines: + raise LocalProtocolError("no request line received") + matches = validate( + request_line_re, lines[0], "illegal request line: {!r}", lines[0] + ) + return Request( + headers=list(_decode_header_lines(lines[1:])), _parsed=True, **matches + ) + + +status_line_re = re.compile(status_line.encode("ascii")) + + +def maybe_read_from_SEND_RESPONSE_server( + buf: ReceiveBuffer, +) -> Union[InformationalResponse, Response, None]: + lines = buf.maybe_extract_lines() + if lines is None: + if buf.is_next_line_obviously_invalid_request_line(): + raise LocalProtocolError("illegal request line") + return None + if not lines: + raise LocalProtocolError("no response line received") + matches = validate(status_line_re, lines[0], "illegal status line: {!r}", lines[0]) + http_version = ( + b"1.1" if matches["http_version"] is None else matches["http_version"] + ) + reason = b"" if matches["reason"] is None else matches["reason"] + status_code = int(matches["status_code"]) + class_: Union[Type[InformationalResponse], Type[Response]] = ( + InformationalResponse if status_code < 200 else Response + ) + return class_( + headers=list(_decode_header_lines(lines[1:])), + _parsed=True, + status_code=status_code, + reason=reason, + http_version=http_version, + ) + + +class ContentLengthReader: + def __init__(self, length: int) -> None: + self._length = length + self._remaining = length + + def __call__(self, buf: ReceiveBuffer) -> Union[Data, EndOfMessage, None]: + if self._remaining == 0: + return EndOfMessage() + data = buf.maybe_extract_at_most(self._remaining) + if data is None: + return None + self._remaining -= len(data) + return Data(data=data) + + def read_eof(self) -> NoReturn: + raise RemoteProtocolError( + "peer closed connection without sending complete message body " + "(received {} bytes, expected {})".format( + self._length - self._remaining, self._length + ) + ) + + +chunk_header_re = re.compile(chunk_header.encode("ascii")) + + +class ChunkedReader: + def __init__(self) -> None: + self._bytes_in_chunk = 0 + # After reading a chunk, we have to throw away the trailing \r\n; if + # this is >0 then we discard that many bytes before resuming regular + # de-chunkification. + self._bytes_to_discard = 0 + self._reading_trailer = False + + def __call__(self, buf: ReceiveBuffer) -> Union[Data, EndOfMessage, None]: + if self._reading_trailer: + lines = buf.maybe_extract_lines() + if lines is None: + return None + return EndOfMessage(headers=list(_decode_header_lines(lines))) + if self._bytes_to_discard > 0: + data = buf.maybe_extract_at_most(self._bytes_to_discard) + if data is None: + return None + self._bytes_to_discard -= len(data) + if self._bytes_to_discard > 0: + return None + # else, fall through and read some more + assert self._bytes_to_discard == 0 + if self._bytes_in_chunk == 0: + # We need to refill our chunk count + chunk_header = buf.maybe_extract_next_line() + if chunk_header is None: + return None + matches = validate( + chunk_header_re, + chunk_header, + "illegal chunk header: {!r}", + chunk_header, + ) + # XX FIXME: we discard chunk extensions. Does anyone care? + self._bytes_in_chunk = int(matches["chunk_size"], base=16) + if self._bytes_in_chunk == 0: + self._reading_trailer = True + return self(buf) + chunk_start = True + else: + chunk_start = False + assert self._bytes_in_chunk > 0 + data = buf.maybe_extract_at_most(self._bytes_in_chunk) + if data is None: + return None + self._bytes_in_chunk -= len(data) + if self._bytes_in_chunk == 0: + self._bytes_to_discard = 2 + chunk_end = True + else: + chunk_end = False + return Data(data=data, chunk_start=chunk_start, chunk_end=chunk_end) + + def read_eof(self) -> NoReturn: + raise RemoteProtocolError( + "peer closed connection without sending complete message body " + "(incomplete chunked read)" + ) + + +class Http10Reader: + def __call__(self, buf: ReceiveBuffer) -> Optional[Data]: + data = buf.maybe_extract_at_most(999999999) + if data is None: + return None + return Data(data=data) + + def read_eof(self) -> EndOfMessage: + return EndOfMessage() + + +def expect_nothing(buf: ReceiveBuffer) -> None: + if buf: + raise LocalProtocolError("Got data when expecting EOF") + return None + + +ReadersType = Dict[ + Union[Type[Sentinel], Tuple[Type[Sentinel], Type[Sentinel]]], + Union[Callable[..., Any], Dict[str, Callable[..., Any]]], +] + +READERS: ReadersType = { + (CLIENT, IDLE): maybe_read_from_IDLE_client, + (SERVER, IDLE): maybe_read_from_SEND_RESPONSE_server, + (SERVER, SEND_RESPONSE): maybe_read_from_SEND_RESPONSE_server, + (CLIENT, DONE): expect_nothing, + (CLIENT, MUST_CLOSE): expect_nothing, + (CLIENT, CLOSED): expect_nothing, + (SERVER, DONE): expect_nothing, + (SERVER, MUST_CLOSE): expect_nothing, + (SERVER, CLOSED): expect_nothing, + SEND_BODY: { + "chunked": ChunkedReader, + "content-length": ContentLengthReader, + "http/1.0": Http10Reader, + }, +} diff --git a/venv/lib/python3.11/site-packages/h11/_receivebuffer.py b/venv/lib/python3.11/site-packages/h11/_receivebuffer.py new file mode 100644 index 0000000..e5c4e08 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_receivebuffer.py @@ -0,0 +1,153 @@ +import re +import sys +from typing import List, Optional, Union + +__all__ = ["ReceiveBuffer"] + + +# Operations we want to support: +# - find next \r\n or \r\n\r\n (\n or \n\n are also acceptable), +# or wait until there is one +# - read at-most-N bytes +# Goals: +# - on average, do this fast +# - worst case, do this in O(n) where n is the number of bytes processed +# Plan: +# - store bytearray, offset, how far we've searched for a separator token +# - use the how-far-we've-searched data to avoid rescanning +# - while doing a stream of uninterrupted processing, advance offset instead +# of constantly copying +# WARNING: +# - I haven't benchmarked or profiled any of this yet. +# +# Note that starting in Python 3.4, deleting the initial n bytes from a +# bytearray is amortized O(n), thanks to some excellent work by Antoine +# Martin: +# +# https://bugs.python.org/issue19087 +# +# This means that if we only supported 3.4+, we could get rid of the code here +# involving self._start and self.compress, because it's doing exactly the same +# thing that bytearray now does internally. +# +# BUT unfortunately, we still support 2.7, and reading short segments out of a +# long buffer MUST be O(bytes read) to avoid DoS issues, so we can't actually +# delete this code. Yet: +# +# https://pythonclock.org/ +# +# (Two things to double-check first though: make sure PyPy also has the +# optimization, and benchmark to make sure it's a win, since we do have a +# slightly clever thing where we delay calling compress() until we've +# processed a whole event, which could in theory be slightly more efficient +# than the internal bytearray support.) +blank_line_regex = re.compile(b"\n\r?\n", re.MULTILINE) + + +class ReceiveBuffer: + def __init__(self) -> None: + self._data = bytearray() + self._next_line_search = 0 + self._multiple_lines_search = 0 + + def __iadd__(self, byteslike: Union[bytes, bytearray]) -> "ReceiveBuffer": + self._data += byteslike + return self + + def __bool__(self) -> bool: + return bool(len(self)) + + def __len__(self) -> int: + return len(self._data) + + # for @property unprocessed_data + def __bytes__(self) -> bytes: + return bytes(self._data) + + def _extract(self, count: int) -> bytearray: + # extracting an initial slice of the data buffer and return it + out = self._data[:count] + del self._data[:count] + + self._next_line_search = 0 + self._multiple_lines_search = 0 + + return out + + def maybe_extract_at_most(self, count: int) -> Optional[bytearray]: + """ + Extract a fixed number of bytes from the buffer. + """ + out = self._data[:count] + if not out: + return None + + return self._extract(count) + + def maybe_extract_next_line(self) -> Optional[bytearray]: + """ + Extract the first line, if it is completed in the buffer. + """ + # Only search in buffer space that we've not already looked at. + search_start_index = max(0, self._next_line_search - 1) + partial_idx = self._data.find(b"\r\n", search_start_index) + + if partial_idx == -1: + self._next_line_search = len(self._data) + return None + + # + 2 is to compensate len(b"\r\n") + idx = partial_idx + 2 + + return self._extract(idx) + + def maybe_extract_lines(self) -> Optional[List[bytearray]]: + """ + Extract everything up to the first blank line, and return a list of lines. + """ + # Handle the case where we have an immediate empty line. + if self._data[:1] == b"\n": + self._extract(1) + return [] + + if self._data[:2] == b"\r\n": + self._extract(2) + return [] + + # Only search in buffer space that we've not already looked at. + match = blank_line_regex.search(self._data, self._multiple_lines_search) + if match is None: + self._multiple_lines_search = max(0, len(self._data) - 2) + return None + + # Truncate the buffer and return it. + idx = match.span(0)[-1] + out = self._extract(idx) + lines = out.split(b"\n") + + for line in lines: + if line.endswith(b"\r"): + del line[-1] + + assert lines[-2] == lines[-1] == b"" + + del lines[-2:] + + return lines + + # In theory we should wait until `\r\n` before starting to validate + # incoming data. However it's interesting to detect (very) invalid data + # early given they might not even contain `\r\n` at all (hence only + # timeout will get rid of them). + # This is not a 100% effective detection but more of a cheap sanity check + # allowing for early abort in some useful cases. + # This is especially interesting when peer is messing up with HTTPS and + # sent us a TLS stream where we were expecting plain HTTP given all + # versions of TLS so far start handshake with a 0x16 message type code. + def is_next_line_obviously_invalid_request_line(self) -> bool: + try: + # HTTP header line must not contain non-printable characters + # and should not start with a space + return self._data[0] < 0x21 + except IndexError: + return False diff --git a/venv/lib/python3.11/site-packages/h11/_state.py b/venv/lib/python3.11/site-packages/h11/_state.py new file mode 100644 index 0000000..3593430 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_state.py @@ -0,0 +1,367 @@ +################################################################ +# The core state machine +################################################################ +# +# Rule 1: everything that affects the state machine and state transitions must +# live here in this file. As much as possible goes into the table-based +# representation, but for the bits that don't quite fit, the actual code and +# state must nonetheless live here. +# +# Rule 2: this file does not know about what role we're playing; it only knows +# about HTTP request/response cycles in the abstract. This ensures that we +# don't cheat and apply different rules to local and remote parties. +# +# +# Theory of operation +# =================== +# +# Possibly the simplest way to think about this is that we actually have 5 +# different state machines here. Yes, 5. These are: +# +# 1) The client state, with its complicated automaton (see the docs) +# 2) The server state, with its complicated automaton (see the docs) +# 3) The keep-alive state, with possible states {True, False} +# 4) The SWITCH_CONNECT state, with possible states {False, True} +# 5) The SWITCH_UPGRADE state, with possible states {False, True} +# +# For (3)-(5), the first state listed is the initial state. +# +# (1)-(3) are stored explicitly in member variables. The last +# two are stored implicitly in the pending_switch_proposals set as: +# (state of 4) == (_SWITCH_CONNECT in pending_switch_proposals) +# (state of 5) == (_SWITCH_UPGRADE in pending_switch_proposals) +# +# And each of these machines has two different kinds of transitions: +# +# a) Event-triggered +# b) State-triggered +# +# Event triggered is the obvious thing that you'd think it is: some event +# happens, and if it's the right event at the right time then a transition +# happens. But there are somewhat complicated rules for which machines can +# "see" which events. (As a rule of thumb, if a machine "sees" an event, this +# means two things: the event can affect the machine, and if the machine is +# not in a state where it expects that event then it's an error.) These rules +# are: +# +# 1) The client machine sees all h11.events objects emitted by the client. +# +# 2) The server machine sees all h11.events objects emitted by the server. +# +# It also sees the client's Request event. +# +# And sometimes, server events are annotated with a _SWITCH_* event. For +# example, we can have a (Response, _SWITCH_CONNECT) event, which is +# different from a regular Response event. +# +# 3) The keep-alive machine sees the process_keep_alive_disabled() event +# (which is derived from Request/Response events), and this event +# transitions it from True -> False, or from False -> False. There's no way +# to transition back. +# +# 4&5) The _SWITCH_* machines transition from False->True when we get a +# Request that proposes the relevant type of switch (via +# process_client_switch_proposals), and they go from True->False when we +# get a Response that has no _SWITCH_* annotation. +# +# So that's event-triggered transitions. +# +# State-triggered transitions are less standard. What they do here is couple +# the machines together. The way this works is, when certain *joint* +# configurations of states are achieved, then we automatically transition to a +# new *joint* state. So, for example, if we're ever in a joint state with +# +# client: DONE +# keep-alive: False +# +# then the client state immediately transitions to: +# +# client: MUST_CLOSE +# +# This is fundamentally different from an event-based transition, because it +# doesn't matter how we arrived at the {client: DONE, keep-alive: False} state +# -- maybe the client transitioned SEND_BODY -> DONE, or keep-alive +# transitioned True -> False. Either way, once this precondition is satisfied, +# this transition is immediately triggered. +# +# What if two conflicting state-based transitions get enabled at the same +# time? In practice there's only one case where this arises (client DONE -> +# MIGHT_SWITCH_PROTOCOL versus DONE -> MUST_CLOSE), and we resolve it by +# explicitly prioritizing the DONE -> MIGHT_SWITCH_PROTOCOL transition. +# +# Implementation +# -------------- +# +# The event-triggered transitions for the server and client machines are all +# stored explicitly in a table. Ditto for the state-triggered transitions that +# involve just the server and client state. +# +# The transitions for the other machines, and the state-triggered transitions +# that involve the other machines, are written out as explicit Python code. +# +# It'd be nice if there were some cleaner way to do all this. This isn't +# *too* terrible, but I feel like it could probably be better. +# +# WARNING +# ------- +# +# The script that generates the state machine diagrams for the docs knows how +# to read out the EVENT_TRIGGERED_TRANSITIONS and STATE_TRIGGERED_TRANSITIONS +# tables. But it can't automatically read the transitions that are written +# directly in Python code. So if you touch those, you need to also update the +# script to keep it in sync! +from typing import cast, Dict, Optional, Set, Tuple, Type, Union + +from ._events import * +from ._util import LocalProtocolError, Sentinel + +# Everything in __all__ gets re-exported as part of the h11 public API. +__all__ = [ + "CLIENT", + "SERVER", + "IDLE", + "SEND_RESPONSE", + "SEND_BODY", + "DONE", + "MUST_CLOSE", + "CLOSED", + "MIGHT_SWITCH_PROTOCOL", + "SWITCHED_PROTOCOL", + "ERROR", +] + + +class CLIENT(Sentinel, metaclass=Sentinel): + pass + + +class SERVER(Sentinel, metaclass=Sentinel): + pass + + +# States +class IDLE(Sentinel, metaclass=Sentinel): + pass + + +class SEND_RESPONSE(Sentinel, metaclass=Sentinel): + pass + + +class SEND_BODY(Sentinel, metaclass=Sentinel): + pass + + +class DONE(Sentinel, metaclass=Sentinel): + pass + + +class MUST_CLOSE(Sentinel, metaclass=Sentinel): + pass + + +class CLOSED(Sentinel, metaclass=Sentinel): + pass + + +class ERROR(Sentinel, metaclass=Sentinel): + pass + + +# Switch types +class MIGHT_SWITCH_PROTOCOL(Sentinel, metaclass=Sentinel): + pass + + +class SWITCHED_PROTOCOL(Sentinel, metaclass=Sentinel): + pass + + +class _SWITCH_UPGRADE(Sentinel, metaclass=Sentinel): + pass + + +class _SWITCH_CONNECT(Sentinel, metaclass=Sentinel): + pass + + +EventTransitionType = Dict[ + Type[Sentinel], + Dict[ + Type[Sentinel], + Dict[Union[Type[Event], Tuple[Type[Event], Type[Sentinel]]], Type[Sentinel]], + ], +] + +EVENT_TRIGGERED_TRANSITIONS: EventTransitionType = { + CLIENT: { + IDLE: {Request: SEND_BODY, ConnectionClosed: CLOSED}, + SEND_BODY: {Data: SEND_BODY, EndOfMessage: DONE}, + DONE: {ConnectionClosed: CLOSED}, + MUST_CLOSE: {ConnectionClosed: CLOSED}, + CLOSED: {ConnectionClosed: CLOSED}, + MIGHT_SWITCH_PROTOCOL: {}, + SWITCHED_PROTOCOL: {}, + ERROR: {}, + }, + SERVER: { + IDLE: { + ConnectionClosed: CLOSED, + Response: SEND_BODY, + # Special case: server sees client Request events, in this form + (Request, CLIENT): SEND_RESPONSE, + }, + SEND_RESPONSE: { + InformationalResponse: SEND_RESPONSE, + Response: SEND_BODY, + (InformationalResponse, _SWITCH_UPGRADE): SWITCHED_PROTOCOL, + (Response, _SWITCH_CONNECT): SWITCHED_PROTOCOL, + }, + SEND_BODY: {Data: SEND_BODY, EndOfMessage: DONE}, + DONE: {ConnectionClosed: CLOSED}, + MUST_CLOSE: {ConnectionClosed: CLOSED}, + CLOSED: {ConnectionClosed: CLOSED}, + SWITCHED_PROTOCOL: {}, + ERROR: {}, + }, +} + +StateTransitionType = Dict[ + Tuple[Type[Sentinel], Type[Sentinel]], Dict[Type[Sentinel], Type[Sentinel]] +] + +# NB: there are also some special-case state-triggered transitions hard-coded +# into _fire_state_triggered_transitions below. +STATE_TRIGGERED_TRANSITIONS: StateTransitionType = { + # (Client state, Server state) -> new states + # Protocol negotiation + (MIGHT_SWITCH_PROTOCOL, SWITCHED_PROTOCOL): {CLIENT: SWITCHED_PROTOCOL}, + # Socket shutdown + (CLOSED, DONE): {SERVER: MUST_CLOSE}, + (CLOSED, IDLE): {SERVER: MUST_CLOSE}, + (ERROR, DONE): {SERVER: MUST_CLOSE}, + (DONE, CLOSED): {CLIENT: MUST_CLOSE}, + (IDLE, CLOSED): {CLIENT: MUST_CLOSE}, + (DONE, ERROR): {CLIENT: MUST_CLOSE}, +} + + +class ConnectionState: + def __init__(self) -> None: + # Extra bits of state that don't quite fit into the state model. + + # If this is False then it enables the automatic DONE -> MUST_CLOSE + # transition. Don't set this directly; call .keep_alive_disabled() + self.keep_alive = True + + # This is a subset of {UPGRADE, CONNECT}, containing the proposals + # made by the client for switching protocols. + self.pending_switch_proposals: Set[Type[Sentinel]] = set() + + self.states: Dict[Type[Sentinel], Type[Sentinel]] = {CLIENT: IDLE, SERVER: IDLE} + + def process_error(self, role: Type[Sentinel]) -> None: + self.states[role] = ERROR + self._fire_state_triggered_transitions() + + def process_keep_alive_disabled(self) -> None: + self.keep_alive = False + self._fire_state_triggered_transitions() + + def process_client_switch_proposal(self, switch_event: Type[Sentinel]) -> None: + self.pending_switch_proposals.add(switch_event) + self._fire_state_triggered_transitions() + + def process_event( + self, + role: Type[Sentinel], + event_type: Type[Event], + server_switch_event: Optional[Type[Sentinel]] = None, + ) -> None: + _event_type: Union[Type[Event], Tuple[Type[Event], Type[Sentinel]]] = event_type + if server_switch_event is not None: + assert role is SERVER + if server_switch_event not in self.pending_switch_proposals: + raise LocalProtocolError( + "Received server {} event without a pending proposal".format( + server_switch_event + ) + ) + _event_type = (event_type, server_switch_event) + if server_switch_event is None and _event_type is Response: + self.pending_switch_proposals = set() + self._fire_event_triggered_transitions(role, _event_type) + # Special case: the server state does get to see Request + # events. + if _event_type is Request: + assert role is CLIENT + self._fire_event_triggered_transitions(SERVER, (Request, CLIENT)) + self._fire_state_triggered_transitions() + + def _fire_event_triggered_transitions( + self, + role: Type[Sentinel], + event_type: Union[Type[Event], Tuple[Type[Event], Type[Sentinel]]], + ) -> None: + state = self.states[role] + try: + new_state = EVENT_TRIGGERED_TRANSITIONS[role][state][event_type] + except KeyError: + event_type = cast(Type[Event], event_type) + raise LocalProtocolError( + "can't handle event type {} when role={} and state={}".format( + event_type.__name__, role, self.states[role] + ) + ) from None + self.states[role] = new_state + + def _fire_state_triggered_transitions(self) -> None: + # We apply these rules repeatedly until converging on a fixed point + while True: + start_states = dict(self.states) + + # It could happen that both these special-case transitions are + # enabled at the same time: + # + # DONE -> MIGHT_SWITCH_PROTOCOL + # DONE -> MUST_CLOSE + # + # For example, this will always be true of a HTTP/1.0 client + # requesting CONNECT. If this happens, the protocol switch takes + # priority. From there the client will either go to + # SWITCHED_PROTOCOL, in which case it's none of our business when + # they close the connection, or else the server will deny the + # request, in which case the client will go back to DONE and then + # from there to MUST_CLOSE. + if self.pending_switch_proposals: + if self.states[CLIENT] is DONE: + self.states[CLIENT] = MIGHT_SWITCH_PROTOCOL + + if not self.pending_switch_proposals: + if self.states[CLIENT] is MIGHT_SWITCH_PROTOCOL: + self.states[CLIENT] = DONE + + if not self.keep_alive: + for role in (CLIENT, SERVER): + if self.states[role] is DONE: + self.states[role] = MUST_CLOSE + + # Tabular state-triggered transitions + joint_state = (self.states[CLIENT], self.states[SERVER]) + changes = STATE_TRIGGERED_TRANSITIONS.get(joint_state, {}) + self.states.update(changes) + + if self.states == start_states: + # Fixed point reached + return + + def start_next_cycle(self) -> None: + if self.states != {CLIENT: DONE, SERVER: DONE}: + raise LocalProtocolError( + "not in a reusable state. self.states={}".format(self.states) + ) + # Can't reach DONE/DONE with any of these active, but still, let's be + # sure. + assert self.keep_alive + assert not self.pending_switch_proposals + self.states = {CLIENT: IDLE, SERVER: IDLE} diff --git a/venv/lib/python3.11/site-packages/h11/_util.py b/venv/lib/python3.11/site-packages/h11/_util.py new file mode 100644 index 0000000..6718445 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_util.py @@ -0,0 +1,135 @@ +from typing import Any, Dict, NoReturn, Pattern, Tuple, Type, TypeVar, Union + +__all__ = [ + "ProtocolError", + "LocalProtocolError", + "RemoteProtocolError", + "validate", + "bytesify", +] + + +class ProtocolError(Exception): + """Exception indicating a violation of the HTTP/1.1 protocol. + + This as an abstract base class, with two concrete base classes: + :exc:`LocalProtocolError`, which indicates that you tried to do something + that HTTP/1.1 says is illegal, and :exc:`RemoteProtocolError`, which + indicates that the remote peer tried to do something that HTTP/1.1 says is + illegal. See :ref:`error-handling` for details. + + In addition to the normal :exc:`Exception` features, it has one attribute: + + .. attribute:: error_status_hint + + This gives a suggestion as to what status code a server might use if + this error occurred as part of a request. + + For a :exc:`RemoteProtocolError`, this is useful as a suggestion for + how you might want to respond to a misbehaving peer, if you're + implementing a server. + + For a :exc:`LocalProtocolError`, this can be taken as a suggestion for + how your peer might have responded to *you* if h11 had allowed you to + continue. + + The default is 400 Bad Request, a generic catch-all for protocol + violations. + + """ + + def __init__(self, msg: str, error_status_hint: int = 400) -> None: + if type(self) is ProtocolError: + raise TypeError("tried to directly instantiate ProtocolError") + Exception.__init__(self, msg) + self.error_status_hint = error_status_hint + + +# Strategy: there are a number of public APIs where a LocalProtocolError can +# be raised (send(), all the different event constructors, ...), and only one +# public API where RemoteProtocolError can be raised +# (receive_data()). Therefore we always raise LocalProtocolError internally, +# and then receive_data will translate this into a RemoteProtocolError. +# +# Internally: +# LocalProtocolError is the generic "ProtocolError". +# Externally: +# LocalProtocolError is for local errors and RemoteProtocolError is for +# remote errors. +class LocalProtocolError(ProtocolError): + def _reraise_as_remote_protocol_error(self) -> NoReturn: + # After catching a LocalProtocolError, use this method to re-raise it + # as a RemoteProtocolError. This method must be called from inside an + # except: block. + # + # An easy way to get an equivalent RemoteProtocolError is just to + # modify 'self' in place. + self.__class__ = RemoteProtocolError # type: ignore + # But the re-raising is somewhat non-trivial -- you might think that + # now that we've modified the in-flight exception object, that just + # doing 'raise' to re-raise it would be enough. But it turns out that + # this doesn't work, because Python tracks the exception type + # (exc_info[0]) separately from the exception object (exc_info[1]), + # and we only modified the latter. So we really do need to re-raise + # the new type explicitly. + # On py3, the traceback is part of the exception object, so our + # in-place modification preserved it and we can just re-raise: + raise self + + +class RemoteProtocolError(ProtocolError): + pass + + +def validate( + regex: Pattern[bytes], data: bytes, msg: str = "malformed data", *format_args: Any +) -> Dict[str, bytes]: + match = regex.fullmatch(data) + if not match: + if format_args: + msg = msg.format(*format_args) + raise LocalProtocolError(msg) + return match.groupdict() + + +# Sentinel values +# +# - Inherit identity-based comparison and hashing from object +# - Have a nice repr +# - Have a *bonus property*: type(sentinel) is sentinel +# +# The bonus property is useful if you want to take the return value from +# next_event() and do some sort of dispatch based on type(event). + +_T_Sentinel = TypeVar("_T_Sentinel", bound="Sentinel") + + +class Sentinel(type): + def __new__( + cls: Type[_T_Sentinel], + name: str, + bases: Tuple[type, ...], + namespace: Dict[str, Any], + **kwds: Any + ) -> _T_Sentinel: + assert bases == (Sentinel,) + v = super().__new__(cls, name, bases, namespace, **kwds) + v.__class__ = v # type: ignore + return v + + def __repr__(self) -> str: + return self.__name__ + + +# Used for methods, request targets, HTTP versions, header names, and header +# values. Accepts ascii-strings, or bytes/bytearray/memoryview/..., and always +# returns bytes. +def bytesify(s: Union[bytes, bytearray, memoryview, int, str]) -> bytes: + # Fast-path: + if type(s) is bytes: + return s + if isinstance(s, str): + s = s.encode("ascii") + if isinstance(s, int): + raise TypeError("expected bytes-like object, not int") + return bytes(s) diff --git a/venv/lib/python3.11/site-packages/h11/_version.py b/venv/lib/python3.11/site-packages/h11/_version.py new file mode 100644 index 0000000..4c89113 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_version.py @@ -0,0 +1,16 @@ +# This file must be kept very simple, because it is consumed from several +# places -- it is imported by h11/__init__.py, execfile'd by setup.py, etc. + +# We use a simple scheme: +# 1.0.0 -> 1.0.0+dev -> 1.1.0 -> 1.1.0+dev +# where the +dev versions are never released into the wild, they're just what +# we stick into the VCS in between releases. +# +# This is compatible with PEP 440: +# http://legacy.python.org/dev/peps/pep-0440/ +# via the use of the "local suffix" "+dev", which is disallowed on index +# servers and causes 1.0.0+dev to sort after plain 1.0.0, which is what we +# want. (Contrast with the special suffix 1.0.0.dev, which sorts *before* +# 1.0.0.) + +__version__ = "0.14.0" diff --git a/venv/lib/python3.11/site-packages/h11/_writers.py b/venv/lib/python3.11/site-packages/h11/_writers.py new file mode 100644 index 0000000..939cdb9 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/_writers.py @@ -0,0 +1,145 @@ +# Code to read HTTP data +# +# Strategy: each writer takes an event + a write-some-bytes function, which is +# calls. +# +# WRITERS is a dict describing how to pick a reader. It maps states to either: +# - a writer +# - or, for body writers, a dict of framin-dependent writer factories + +from typing import Any, Callable, Dict, List, Tuple, Type, Union + +from ._events import Data, EndOfMessage, Event, InformationalResponse, Request, Response +from ._headers import Headers +from ._state import CLIENT, IDLE, SEND_BODY, SEND_RESPONSE, SERVER +from ._util import LocalProtocolError, Sentinel + +__all__ = ["WRITERS"] + +Writer = Callable[[bytes], Any] + + +def write_headers(headers: Headers, write: Writer) -> None: + # "Since the Host field-value is critical information for handling a + # request, a user agent SHOULD generate Host as the first header field + # following the request-line." - RFC 7230 + raw_items = headers._full_items + for raw_name, name, value in raw_items: + if name == b"host": + write(b"%s: %s\r\n" % (raw_name, value)) + for raw_name, name, value in raw_items: + if name != b"host": + write(b"%s: %s\r\n" % (raw_name, value)) + write(b"\r\n") + + +def write_request(request: Request, write: Writer) -> None: + if request.http_version != b"1.1": + raise LocalProtocolError("I only send HTTP/1.1") + write(b"%s %s HTTP/1.1\r\n" % (request.method, request.target)) + write_headers(request.headers, write) + + +# Shared between InformationalResponse and Response +def write_any_response( + response: Union[InformationalResponse, Response], write: Writer +) -> None: + if response.http_version != b"1.1": + raise LocalProtocolError("I only send HTTP/1.1") + status_bytes = str(response.status_code).encode("ascii") + # We don't bother sending ascii status messages like "OK"; they're + # optional and ignored by the protocol. (But the space after the numeric + # status code is mandatory.) + # + # XX FIXME: could at least make an effort to pull out the status message + # from stdlib's http.HTTPStatus table. Or maybe just steal their enums + # (either by import or copy/paste). We already accept them as status codes + # since they're of type IntEnum < int. + write(b"HTTP/1.1 %s %s\r\n" % (status_bytes, response.reason)) + write_headers(response.headers, write) + + +class BodyWriter: + def __call__(self, event: Event, write: Writer) -> None: + if type(event) is Data: + self.send_data(event.data, write) + elif type(event) is EndOfMessage: + self.send_eom(event.headers, write) + else: # pragma: no cover + assert False + + def send_data(self, data: bytes, write: Writer) -> None: + pass + + def send_eom(self, headers: Headers, write: Writer) -> None: + pass + + +# +# These are all careful not to do anything to 'data' except call len(data) and +# write(data). This allows us to transparently pass-through funny objects, +# like placeholder objects referring to files on disk that will be sent via +# sendfile(2). +# +class ContentLengthWriter(BodyWriter): + def __init__(self, length: int) -> None: + self._length = length + + def send_data(self, data: bytes, write: Writer) -> None: + self._length -= len(data) + if self._length < 0: + raise LocalProtocolError("Too much data for declared Content-Length") + write(data) + + def send_eom(self, headers: Headers, write: Writer) -> None: + if self._length != 0: + raise LocalProtocolError("Too little data for declared Content-Length") + if headers: + raise LocalProtocolError("Content-Length and trailers don't mix") + + +class ChunkedWriter(BodyWriter): + def send_data(self, data: bytes, write: Writer) -> None: + # if we encoded 0-length data in the naive way, it would look like an + # end-of-message. + if not data: + return + write(b"%x\r\n" % len(data)) + write(data) + write(b"\r\n") + + def send_eom(self, headers: Headers, write: Writer) -> None: + write(b"0\r\n") + write_headers(headers, write) + + +class Http10Writer(BodyWriter): + def send_data(self, data: bytes, write: Writer) -> None: + write(data) + + def send_eom(self, headers: Headers, write: Writer) -> None: + if headers: + raise LocalProtocolError("can't send trailers to HTTP/1.0 client") + # no need to close the socket ourselves, that will be taken care of by + # Connection: close machinery + + +WritersType = Dict[ + Union[Tuple[Type[Sentinel], Type[Sentinel]], Type[Sentinel]], + Union[ + Dict[str, Type[BodyWriter]], + Callable[[Union[InformationalResponse, Response], Writer], None], + Callable[[Request, Writer], None], + ], +] + +WRITERS: WritersType = { + (CLIENT, IDLE): write_request, + (SERVER, IDLE): write_any_response, + (SERVER, SEND_RESPONSE): write_any_response, + SEND_BODY: { + "chunked": ChunkedWriter, + "content-length": ContentLengthWriter, + "http/1.0": Http10Writer, + }, +} diff --git 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/dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/helpers.py @@ -0,0 +1,101 @@ +from typing import cast, List, Type, Union, ValuesView + +from .._connection import Connection, NEED_DATA, PAUSED +from .._events import ( + ConnectionClosed, + Data, + EndOfMessage, + Event, + InformationalResponse, + Request, + Response, +) +from .._state import CLIENT, CLOSED, DONE, MUST_CLOSE, SERVER +from .._util import Sentinel + +try: + from typing import Literal +except ImportError: + from typing_extensions import Literal # type: ignore + + +def get_all_events(conn: Connection) -> List[Event]: + got_events = [] + while True: + event = conn.next_event() + if event in (NEED_DATA, PAUSED): + break + event = cast(Event, event) + got_events.append(event) + if type(event) is ConnectionClosed: + break + return got_events + + +def receive_and_get(conn: Connection, data: bytes) -> List[Event]: + conn.receive_data(data) + return get_all_events(conn) + + +# Merges adjacent Data events, converts payloads to bytestrings, and removes +# chunk boundaries. +def normalize_data_events(in_events: List[Event]) -> List[Event]: + out_events: List[Event] = [] + for event in in_events: + if type(event) is Data: + event = Data(data=bytes(event.data), chunk_start=False, chunk_end=False) + if out_events and type(out_events[-1]) is type(event) is Data: + out_events[-1] = Data( + data=out_events[-1].data + event.data, + chunk_start=out_events[-1].chunk_start, + chunk_end=out_events[-1].chunk_end, + ) + else: + out_events.append(event) + return out_events + + +# Given that we want to write tests that push some events through a Connection +# and check that its state updates appropriately... we might as make a habit +# of pushing them through two Connections with a fake network link in +# between. +class ConnectionPair: + def __init__(self) -> None: + self.conn = {CLIENT: Connection(CLIENT), SERVER: Connection(SERVER)} + self.other = {CLIENT: SERVER, SERVER: CLIENT} + + @property + def conns(self) -> ValuesView[Connection]: + return self.conn.values() + + # expect="match" if expect=send_events; expect=[...] to say what expected + def send( + self, + role: Type[Sentinel], + send_events: Union[List[Event], Event], + expect: Union[List[Event], Event, Literal["match"]] = "match", + ) -> bytes: + if not isinstance(send_events, list): + send_events = [send_events] + data = b"" + closed = False + for send_event in send_events: + new_data = self.conn[role].send(send_event) + if new_data is None: + closed = True + else: + data += new_data + # send uses b"" to mean b"", and None to mean closed + # receive uses b"" to mean closed, and None to mean "try again" + # so we have to translate between the two conventions + if data: + self.conn[self.other[role]].receive_data(data) + if closed: + self.conn[self.other[role]].receive_data(b"") + got_events = get_all_events(self.conn[self.other[role]]) + if expect == "match": + expect = send_events + if not isinstance(expect, list): + expect = [expect] + assert got_events == expect + return data diff --git a/venv/lib/python3.11/site-packages/h11/tests/test_against_stdlib_http.py b/venv/lib/python3.11/site-packages/h11/tests/test_against_stdlib_http.py new file mode 100644 index 0000000..d2ee131 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/test_against_stdlib_http.py @@ -0,0 +1,115 @@ +import json +import os.path +import socket +import socketserver +import threading +from contextlib import closing, contextmanager +from http.server import SimpleHTTPRequestHandler +from typing import Callable, Generator +from urllib.request import urlopen + +import h11 + + +@contextmanager +def socket_server( + handler: Callable[..., socketserver.BaseRequestHandler] +) -> Generator[socketserver.TCPServer, None, None]: + httpd = socketserver.TCPServer(("127.0.0.1", 0), handler) + thread = threading.Thread( + target=httpd.serve_forever, kwargs={"poll_interval": 0.01} + ) + thread.daemon = True + try: + thread.start() + yield httpd + finally: + httpd.shutdown() + + +test_file_path = os.path.join(os.path.dirname(__file__), "data/test-file") +with open(test_file_path, "rb") as f: + test_file_data = f.read() + + +class SingleMindedRequestHandler(SimpleHTTPRequestHandler): + def translate_path(self, path: str) -> str: + return test_file_path + + +def test_h11_as_client() -> None: + with socket_server(SingleMindedRequestHandler) as httpd: + with closing(socket.create_connection(httpd.server_address)) as s: + c = h11.Connection(h11.CLIENT) + + s.sendall( + c.send( # type: ignore[arg-type] + h11.Request( + method="GET", target="/foo", headers=[("Host", "localhost")] + ) + ) + ) + s.sendall(c.send(h11.EndOfMessage())) # type: ignore[arg-type] + + data = bytearray() + while True: + event = c.next_event() + print(event) + if event is h11.NEED_DATA: + # Use a small read buffer to make things more challenging + # and exercise more paths :-) + c.receive_data(s.recv(10)) + continue + if type(event) is h11.Response: + assert event.status_code == 200 + if type(event) is h11.Data: + data += event.data + if type(event) is h11.EndOfMessage: + break + assert bytes(data) == test_file_data + + +class H11RequestHandler(socketserver.BaseRequestHandler): + def handle(self) -> None: + with closing(self.request) as s: + c = h11.Connection(h11.SERVER) + request = None + while True: + event = c.next_event() + if event is h11.NEED_DATA: + # Use a small read buffer to make things more challenging + # and exercise more paths :-) + c.receive_data(s.recv(10)) + continue + if type(event) is h11.Request: + request = event + if type(event) is h11.EndOfMessage: + break + assert request is not None + info = json.dumps( + { + "method": request.method.decode("ascii"), + "target": request.target.decode("ascii"), + "headers": { + name.decode("ascii"): value.decode("ascii") + for (name, value) in request.headers + }, + } + ) + s.sendall(c.send(h11.Response(status_code=200, headers=[]))) # type: ignore[arg-type] + s.sendall(c.send(h11.Data(data=info.encode("ascii")))) + s.sendall(c.send(h11.EndOfMessage())) + + +def test_h11_as_server() -> None: + with socket_server(H11RequestHandler) as httpd: + host, port = httpd.server_address + url = "http://{}:{}/some-path".format(host, port) + with closing(urlopen(url)) as f: + assert f.getcode() == 200 + data = f.read() + info = json.loads(data.decode("ascii")) + print(info) + assert info["method"] == "GET" + assert info["target"] == "/some-path" + assert "urllib" in info["headers"]["user-agent"] diff --git a/venv/lib/python3.11/site-packages/h11/tests/test_connection.py b/venv/lib/python3.11/site-packages/h11/tests/test_connection.py new file mode 100644 index 0000000..73a27b9 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/test_connection.py @@ -0,0 +1,1122 @@ +from typing import Any, cast, Dict, List, Optional, Tuple, Type + +import pytest + +from .._connection import _body_framing, _keep_alive, Connection, NEED_DATA, PAUSED +from .._events import ( + ConnectionClosed, + Data, + EndOfMessage, + Event, + InformationalResponse, + Request, + Response, +) +from .._state import ( + CLIENT, + CLOSED, + DONE, + ERROR, + IDLE, + MIGHT_SWITCH_PROTOCOL, + MUST_CLOSE, + SEND_BODY, + SEND_RESPONSE, + SERVER, + SWITCHED_PROTOCOL, +) +from .._util import LocalProtocolError, RemoteProtocolError, Sentinel +from .helpers import ConnectionPair, get_all_events, receive_and_get + + +def test__keep_alive() -> None: + assert _keep_alive( + Request(method="GET", target="/", headers=[("Host", "Example.com")]) + ) + assert not _keep_alive( + Request( + method="GET", + target="/", + headers=[("Host", "Example.com"), ("Connection", "close")], + ) + ) + assert not _keep_alive( + Request( + method="GET", + target="/", + headers=[("Host", "Example.com"), ("Connection", "a, b, cLOse, foo")], + ) + ) + assert not _keep_alive( + Request(method="GET", target="/", headers=[], http_version="1.0") # type: ignore[arg-type] + ) + + assert _keep_alive(Response(status_code=200, headers=[])) # type: ignore[arg-type] + assert not _keep_alive(Response(status_code=200, headers=[("Connection", "close")])) + assert not _keep_alive( + Response(status_code=200, headers=[("Connection", "a, b, cLOse, foo")]) + ) + assert not _keep_alive(Response(status_code=200, headers=[], http_version="1.0")) # type: ignore[arg-type] + + +def test__body_framing() -> None: + def headers(cl: Optional[int], te: bool) -> List[Tuple[str, str]]: + headers = [] + if cl is not None: + headers.append(("Content-Length", str(cl))) + if te: + headers.append(("Transfer-Encoding", "chunked")) + return headers + + def resp( + status_code: int = 200, cl: Optional[int] = None, te: bool = False + ) -> Response: + return Response(status_code=status_code, headers=headers(cl, te)) + + def req(cl: Optional[int] = None, te: bool = False) -> Request: + h = headers(cl, te) + h += [("Host", "example.com")] + return Request(method="GET", target="/", headers=h) + + # Special cases where the headers are ignored: + for kwargs in [{}, {"cl": 100}, {"te": True}, {"cl": 100, "te": True}]: + kwargs = cast(Dict[str, Any], kwargs) + for meth, r in [ + (b"HEAD", resp(**kwargs)), + (b"GET", resp(status_code=204, **kwargs)), + (b"GET", resp(status_code=304, **kwargs)), + ]: + assert _body_framing(meth, r) == ("content-length", (0,)) + + # Transfer-encoding + for kwargs in [{"te": True}, {"cl": 100, "te": True}]: + kwargs = cast(Dict[str, Any], kwargs) + for meth, r in [(None, req(**kwargs)), (b"GET", resp(**kwargs))]: # type: ignore + assert _body_framing(meth, r) == ("chunked", ()) + + # Content-Length + for meth, r in [(None, req(cl=100)), (b"GET", resp(cl=100))]: # type: ignore + assert _body_framing(meth, r) == ("content-length", (100,)) + + # No headers + assert _body_framing(None, req()) == ("content-length", (0,)) # type: ignore + assert _body_framing(b"GET", resp()) == ("http/1.0", ()) + + +def test_Connection_basics_and_content_length() -> None: + with pytest.raises(ValueError): + Connection("CLIENT") # type: ignore + + p = ConnectionPair() + assert p.conn[CLIENT].our_role is CLIENT + assert p.conn[CLIENT].their_role is SERVER + assert p.conn[SERVER].our_role is SERVER + assert p.conn[SERVER].their_role is CLIENT + + data = p.send( + CLIENT, + Request( + method="GET", + target="/", + headers=[("Host", "example.com"), ("Content-Length", "10")], + ), + ) + assert data == ( + b"GET / HTTP/1.1\r\n" b"Host: example.com\r\n" b"Content-Length: 10\r\n\r\n" + ) + + for conn in p.conns: + assert conn.states == {CLIENT: SEND_BODY, SERVER: SEND_RESPONSE} + assert p.conn[CLIENT].our_state is SEND_BODY + assert p.conn[CLIENT].their_state is SEND_RESPONSE + assert p.conn[SERVER].our_state is SEND_RESPONSE + assert p.conn[SERVER].their_state is SEND_BODY + + assert p.conn[CLIENT].their_http_version is None + assert p.conn[SERVER].their_http_version == b"1.1" + + data = p.send(SERVER, InformationalResponse(status_code=100, headers=[])) # type: ignore[arg-type] + assert data == b"HTTP/1.1 100 \r\n\r\n" + + data = p.send(SERVER, Response(status_code=200, headers=[("Content-Length", "11")])) + assert data == b"HTTP/1.1 200 \r\nContent-Length: 11\r\n\r\n" + + for conn in p.conns: + assert conn.states == {CLIENT: SEND_BODY, SERVER: SEND_BODY} + + assert p.conn[CLIENT].their_http_version == b"1.1" + assert p.conn[SERVER].their_http_version == b"1.1" + + data = p.send(CLIENT, Data(data=b"12345")) + assert data == b"12345" + data = p.send( + CLIENT, Data(data=b"67890"), expect=[Data(data=b"67890"), EndOfMessage()] + ) + assert data == b"67890" + data = p.send(CLIENT, EndOfMessage(), expect=[]) + assert data == b"" + + for conn in p.conns: + assert conn.states == {CLIENT: DONE, SERVER: SEND_BODY} + + data = p.send(SERVER, Data(data=b"1234567890")) + assert data == b"1234567890" + data = p.send(SERVER, Data(data=b"1"), expect=[Data(data=b"1"), EndOfMessage()]) + assert data == b"1" + data = p.send(SERVER, EndOfMessage(), expect=[]) + assert data == b"" + + for conn in p.conns: + assert conn.states == {CLIENT: DONE, SERVER: DONE} + + +def test_chunked() -> None: + p = ConnectionPair() + + p.send( + CLIENT, + Request( + method="GET", + target="/", + headers=[("Host", "example.com"), ("Transfer-Encoding", "chunked")], + ), + ) + data = p.send(CLIENT, Data(data=b"1234567890", chunk_start=True, chunk_end=True)) + assert data == b"a\r\n1234567890\r\n" + data = p.send(CLIENT, Data(data=b"abcde", chunk_start=True, chunk_end=True)) + assert data == b"5\r\nabcde\r\n" + data = p.send(CLIENT, Data(data=b""), expect=[]) + assert data == b"" + data = p.send(CLIENT, EndOfMessage(headers=[("hello", "there")])) + assert data == b"0\r\nhello: there\r\n\r\n" + + p.send( + SERVER, Response(status_code=200, headers=[("Transfer-Encoding", "chunked")]) + ) + p.send(SERVER, Data(data=b"54321", chunk_start=True, chunk_end=True)) + p.send(SERVER, Data(data=b"12345", chunk_start=True, chunk_end=True)) + p.send(SERVER, EndOfMessage()) + + for conn in p.conns: + assert conn.states == {CLIENT: DONE, SERVER: DONE} + + +def test_chunk_boundaries() -> None: + conn = Connection(our_role=SERVER) + + request = ( + b"POST / HTTP/1.1\r\n" + b"Host: example.com\r\n" + b"Transfer-Encoding: chunked\r\n" + b"\r\n" + ) + conn.receive_data(request) + assert conn.next_event() == Request( + method="POST", + target="/", + headers=[("Host", "example.com"), ("Transfer-Encoding", "chunked")], + ) + assert conn.next_event() is NEED_DATA + + conn.receive_data(b"5\r\nhello\r\n") + assert conn.next_event() == Data(data=b"hello", chunk_start=True, chunk_end=True) + + conn.receive_data(b"5\r\nhel") + assert conn.next_event() == Data(data=b"hel", chunk_start=True, chunk_end=False) + + conn.receive_data(b"l") + assert conn.next_event() == Data(data=b"l", chunk_start=False, chunk_end=False) + + conn.receive_data(b"o\r\n") + assert conn.next_event() == Data(data=b"o", chunk_start=False, chunk_end=True) + + conn.receive_data(b"5\r\nhello") + assert conn.next_event() == Data(data=b"hello", chunk_start=True, chunk_end=True) + + conn.receive_data(b"\r\n") + assert conn.next_event() == NEED_DATA + + conn.receive_data(b"0\r\n\r\n") + assert conn.next_event() == EndOfMessage() + + +def test_client_talking_to_http10_server() -> None: + c = Connection(CLIENT) + c.send(Request(method="GET", target="/", headers=[("Host", "example.com")])) + c.send(EndOfMessage()) + assert c.our_state is DONE + # No content-length, so Http10 framing for body + assert receive_and_get(c, b"HTTP/1.0 200 OK\r\n\r\n") == [ + Response(status_code=200, headers=[], http_version="1.0", reason=b"OK") # type: ignore[arg-type] + ] + assert c.our_state is MUST_CLOSE + assert receive_and_get(c, b"12345") == [Data(data=b"12345")] + assert receive_and_get(c, b"67890") == [Data(data=b"67890")] + assert receive_and_get(c, b"") == [EndOfMessage(), ConnectionClosed()] + assert c.their_state is CLOSED + + +def test_server_talking_to_http10_client() -> None: + c = Connection(SERVER) + # No content-length, so no body + # NB: no host header + assert receive_and_get(c, b"GET / HTTP/1.0\r\n\r\n") == [ + Request(method="GET", target="/", headers=[], http_version="1.0"), # type: ignore[arg-type] + EndOfMessage(), + ] + assert c.their_state is MUST_CLOSE + + # We automatically Connection: close back at them + assert ( + c.send(Response(status_code=200, headers=[])) # type: ignore[arg-type] + == b"HTTP/1.1 200 \r\nConnection: close\r\n\r\n" + ) + + assert c.send(Data(data=b"12345")) == b"12345" + assert c.send(EndOfMessage()) == b"" + assert c.our_state is MUST_CLOSE + + # Check that it works if they do send Content-Length + c = Connection(SERVER) + # NB: no host header + assert receive_and_get(c, b"POST / HTTP/1.0\r\nContent-Length: 10\r\n\r\n1") == [ + Request( + method="POST", + target="/", + headers=[("Content-Length", "10")], + http_version="1.0", + ), + Data(data=b"1"), + ] + assert receive_and_get(c, b"234567890") == [Data(data=b"234567890"), EndOfMessage()] + assert c.their_state is MUST_CLOSE + assert receive_and_get(c, b"") == [ConnectionClosed()] + + +def test_automatic_transfer_encoding_in_response() -> None: + # Check that in responses, the user can specify either Transfer-Encoding: + # chunked or no framing at all, and in both cases we automatically select + # the right option depending on whether the peer speaks HTTP/1.0 or + # HTTP/1.1 + for user_headers in [ + [("Transfer-Encoding", "chunked")], + [], + # In fact, this even works if Content-Length is set, + # because if both are set then Transfer-Encoding wins + [("Transfer-Encoding", "chunked"), ("Content-Length", "100")], + ]: + user_headers = cast(List[Tuple[str, str]], user_headers) + p = ConnectionPair() + p.send( + CLIENT, + [ + Request(method="GET", target="/", headers=[("Host", "example.com")]), + EndOfMessage(), + ], + ) + # When speaking to HTTP/1.1 client, all of the above cases get + # normalized to Transfer-Encoding: chunked + p.send( + SERVER, + Response(status_code=200, headers=user_headers), + expect=Response( + status_code=200, headers=[("Transfer-Encoding", "chunked")] + ), + ) + + # When speaking to HTTP/1.0 client, all of the above cases get + # normalized to no-framing-headers + c = Connection(SERVER) + receive_and_get(c, b"GET / HTTP/1.0\r\n\r\n") + assert ( + c.send(Response(status_code=200, headers=user_headers)) + == b"HTTP/1.1 200 \r\nConnection: close\r\n\r\n" + ) + assert c.send(Data(data=b"12345")) == b"12345" + + +def test_automagic_connection_close_handling() -> None: + p = ConnectionPair() + # If the user explicitly sets Connection: close, then we notice and + # respect it + p.send( + CLIENT, + [ + Request( + method="GET", + target="/", + headers=[("Host", "example.com"), ("Connection", "close")], + ), + EndOfMessage(), + ], + ) + for conn in p.conns: + assert conn.states[CLIENT] is MUST_CLOSE + # And if the client sets it, the server automatically echoes it back + p.send( + SERVER, + # no header here... + [Response(status_code=204, headers=[]), EndOfMessage()], # type: ignore[arg-type] + # ...but oh look, it arrived anyway + expect=[ + Response(status_code=204, headers=[("connection", "close")]), + EndOfMessage(), + ], + ) + for conn in p.conns: + assert conn.states == {CLIENT: MUST_CLOSE, SERVER: MUST_CLOSE} + + +def test_100_continue() -> None: + def setup() -> ConnectionPair: + p = ConnectionPair() + p.send( + CLIENT, + Request( + method="GET", + target="/", + headers=[ + ("Host", "example.com"), + ("Content-Length", "100"), + ("Expect", "100-continue"), + ], + ), + ) + for conn in p.conns: + assert conn.client_is_waiting_for_100_continue + assert not p.conn[CLIENT].they_are_waiting_for_100_continue + assert p.conn[SERVER].they_are_waiting_for_100_continue + return p + + # Disabled by 100 Continue + p = setup() + p.send(SERVER, InformationalResponse(status_code=100, headers=[])) # type: ignore[arg-type] + for conn in p.conns: + assert not conn.client_is_waiting_for_100_continue + assert not conn.they_are_waiting_for_100_continue + + # Disabled by a real response + p = setup() + p.send( + SERVER, Response(status_code=200, headers=[("Transfer-Encoding", "chunked")]) + ) + for conn in p.conns: + assert not conn.client_is_waiting_for_100_continue + assert not conn.they_are_waiting_for_100_continue + + # Disabled by the client going ahead and sending stuff anyway + p = setup() + p.send(CLIENT, Data(data=b"12345")) + for conn in p.conns: + assert not conn.client_is_waiting_for_100_continue + assert not conn.they_are_waiting_for_100_continue + + +def test_max_incomplete_event_size_countermeasure() -> None: + # Infinitely long headers are definitely not okay + c = Connection(SERVER) + c.receive_data(b"GET / HTTP/1.0\r\nEndless: ") + assert c.next_event() is NEED_DATA + with pytest.raises(RemoteProtocolError): + while True: + c.receive_data(b"a" * 1024) + c.next_event() + + # Checking that the same header is accepted / rejected depending on the + # max_incomplete_event_size setting: + c = Connection(SERVER, max_incomplete_event_size=5000) + c.receive_data(b"GET / HTTP/1.0\r\nBig: ") + c.receive_data(b"a" * 4000) + c.receive_data(b"\r\n\r\n") + assert get_all_events(c) == [ + Request( + method="GET", target="/", http_version="1.0", headers=[("big", "a" * 4000)] + ), + EndOfMessage(), + ] + + c = Connection(SERVER, max_incomplete_event_size=4000) + c.receive_data(b"GET / HTTP/1.0\r\nBig: ") + c.receive_data(b"a" * 4000) + with pytest.raises(RemoteProtocolError): + c.next_event() + + # Temporarily exceeding the size limit is fine, as long as its done with + # complete events: + c = Connection(SERVER, max_incomplete_event_size=5000) + c.receive_data(b"GET / HTTP/1.0\r\nContent-Length: 10000") + c.receive_data(b"\r\n\r\n" + b"a" * 10000) + assert get_all_events(c) == [ + Request( + method="GET", + target="/", + http_version="1.0", + headers=[("Content-Length", "10000")], + ), + Data(data=b"a" * 10000), + EndOfMessage(), + ] + + c = Connection(SERVER, max_incomplete_event_size=100) + # Two pipelined requests to create a way-too-big receive buffer... but + # it's fine because we're not checking + c.receive_data( + b"GET /1 HTTP/1.1\r\nHost: a\r\n\r\n" + b"GET /2 HTTP/1.1\r\nHost: b\r\n\r\n" + b"X" * 1000 + ) + assert get_all_events(c) == [ + Request(method="GET", target="/1", headers=[("host", "a")]), + EndOfMessage(), + ] + # Even more data comes in, still no problem + c.receive_data(b"X" * 1000) + # We can respond and reuse to get the second pipelined request + c.send(Response(status_code=200, headers=[])) # type: ignore[arg-type] + c.send(EndOfMessage()) + c.start_next_cycle() + assert get_all_events(c) == [ + Request(method="GET", target="/2", headers=[("host", "b")]), + EndOfMessage(), + ] + # But once we unpause and try to read the next message, and find that it's + # incomplete and the buffer is *still* way too large, then *that's* a + # problem: + c.send(Response(status_code=200, headers=[])) # type: ignore[arg-type] + c.send(EndOfMessage()) + c.start_next_cycle() + with pytest.raises(RemoteProtocolError): + c.next_event() + + +def test_reuse_simple() -> None: + p = ConnectionPair() + p.send( + CLIENT, + [Request(method="GET", target="/", headers=[("Host", "a")]), EndOfMessage()], + ) + p.send( + SERVER, + [ + Response(status_code=200, headers=[(b"transfer-encoding", b"chunked")]), + EndOfMessage(), + ], + ) + for conn in p.conns: + assert conn.states == {CLIENT: DONE, SERVER: DONE} + conn.start_next_cycle() + + p.send( + CLIENT, + [ + Request(method="DELETE", target="/foo", headers=[("Host", "a")]), + EndOfMessage(), + ], + ) + p.send( + SERVER, + [ + Response(status_code=404, headers=[(b"transfer-encoding", b"chunked")]), + EndOfMessage(), + ], + ) + + +def test_pipelining() -> None: + # Client doesn't support pipelining, so we have to do this by hand + c = Connection(SERVER) + assert c.next_event() is NEED_DATA + # 3 requests all bunched up + c.receive_data( + b"GET /1 HTTP/1.1\r\nHost: a.com\r\nContent-Length: 5\r\n\r\n" + b"12345" + b"GET /2 HTTP/1.1\r\nHost: a.com\r\nContent-Length: 5\r\n\r\n" + b"67890" + b"GET /3 HTTP/1.1\r\nHost: a.com\r\n\r\n" + ) + assert get_all_events(c) == [ + Request( + method="GET", + target="/1", + headers=[("Host", "a.com"), ("Content-Length", "5")], + ), + Data(data=b"12345"), + EndOfMessage(), + ] + assert c.their_state is DONE + assert c.our_state is SEND_RESPONSE + + assert c.next_event() is PAUSED + + c.send(Response(status_code=200, headers=[])) # type: ignore[arg-type] + c.send(EndOfMessage()) + assert c.their_state is DONE + assert c.our_state is DONE + + c.start_next_cycle() + + assert get_all_events(c) == [ + Request( + method="GET", + target="/2", + headers=[("Host", "a.com"), ("Content-Length", "5")], + ), + Data(data=b"67890"), + EndOfMessage(), + ] + assert c.next_event() is PAUSED + c.send(Response(status_code=200, headers=[])) # type: ignore[arg-type] + c.send(EndOfMessage()) + c.start_next_cycle() + + assert get_all_events(c) == [ + Request(method="GET", target="/3", headers=[("Host", "a.com")]), + EndOfMessage(), + ] + # Doesn't pause this time, no trailing data + assert c.next_event() is NEED_DATA + c.send(Response(status_code=200, headers=[])) # type: ignore[arg-type] + c.send(EndOfMessage()) + + # Arrival of more data triggers pause + assert c.next_event() is NEED_DATA + c.receive_data(b"SADF") + assert c.next_event() is PAUSED + assert c.trailing_data == (b"SADF", False) + # If EOF arrives while paused, we don't see that either: + c.receive_data(b"") + assert c.trailing_data == (b"SADF", True) + assert c.next_event() is PAUSED + c.receive_data(b"") + assert c.next_event() is PAUSED + # Can't call receive_data with non-empty buf after closing it + with pytest.raises(RuntimeError): + c.receive_data(b"FDSA") + + +def test_protocol_switch() -> None: + for (req, deny, accept) in [ + ( + Request( + method="CONNECT", + target="example.com:443", + headers=[("Host", "foo"), ("Content-Length", "1")], + ), + Response(status_code=404, headers=[(b"transfer-encoding", b"chunked")]), + Response(status_code=200, headers=[(b"transfer-encoding", b"chunked")]), + ), + ( + Request( + method="GET", + target="/", + headers=[("Host", "foo"), ("Content-Length", "1"), ("Upgrade", "a, b")], + ), + Response(status_code=200, headers=[(b"transfer-encoding", b"chunked")]), + InformationalResponse(status_code=101, headers=[("Upgrade", "a")]), + ), + ( + Request( + method="CONNECT", + target="example.com:443", + headers=[("Host", "foo"), ("Content-Length", "1"), ("Upgrade", "a, b")], + ), + Response(status_code=404, headers=[(b"transfer-encoding", b"chunked")]), + # Accept CONNECT, not upgrade + Response(status_code=200, headers=[(b"transfer-encoding", b"chunked")]), + ), + ( + Request( + method="CONNECT", + target="example.com:443", + headers=[("Host", "foo"), ("Content-Length", "1"), ("Upgrade", "a, b")], + ), + Response(status_code=404, headers=[(b"transfer-encoding", b"chunked")]), + # Accept Upgrade, not CONNECT + InformationalResponse(status_code=101, headers=[("Upgrade", "b")]), + ), + ]: + + def setup() -> ConnectionPair: + p = ConnectionPair() + p.send(CLIENT, req) + # No switch-related state change stuff yet; the client has to + # finish the request before that kicks in + for conn in p.conns: + assert conn.states[CLIENT] is SEND_BODY + p.send(CLIENT, [Data(data=b"1"), EndOfMessage()]) + for conn in p.conns: + assert conn.states[CLIENT] is MIGHT_SWITCH_PROTOCOL + assert p.conn[SERVER].next_event() is PAUSED + return p + + # Test deny case + p = setup() + p.send(SERVER, deny) + for conn in p.conns: + assert conn.states == {CLIENT: DONE, SERVER: SEND_BODY} + p.send(SERVER, EndOfMessage()) + # Check that re-use is still allowed after a denial + for conn in p.conns: + conn.start_next_cycle() + + # Test accept case + p = setup() + p.send(SERVER, accept) + for conn in p.conns: + assert conn.states == {CLIENT: SWITCHED_PROTOCOL, SERVER: SWITCHED_PROTOCOL} + conn.receive_data(b"123") + assert conn.next_event() is PAUSED + conn.receive_data(b"456") + assert conn.next_event() is PAUSED + assert conn.trailing_data == (b"123456", False) + + # Pausing in might-switch, then recovery + # (weird artificial case where the trailing data actually is valid + # HTTP for some reason, because this makes it easier to test the state + # logic) + p = setup() + sc = p.conn[SERVER] + sc.receive_data(b"GET / HTTP/1.0\r\n\r\n") + assert sc.next_event() is PAUSED + assert sc.trailing_data == (b"GET / HTTP/1.0\r\n\r\n", False) + sc.send(deny) + assert sc.next_event() is PAUSED + sc.send(EndOfMessage()) + sc.start_next_cycle() + assert get_all_events(sc) == [ + Request(method="GET", target="/", headers=[], http_version="1.0"), # type: ignore[arg-type] + EndOfMessage(), + ] + + # When we're DONE, have no trailing data, and the connection gets + # closed, we report ConnectionClosed(). When we're in might-switch or + # switched, we don't. + p = setup() + sc = p.conn[SERVER] + sc.receive_data(b"") + assert sc.next_event() is PAUSED + assert sc.trailing_data == (b"", True) + p.send(SERVER, accept) + assert sc.next_event() is PAUSED + + p = setup() + sc = p.conn[SERVER] + sc.receive_data(b"") + assert sc.next_event() is PAUSED + sc.send(deny) + assert sc.next_event() == ConnectionClosed() + + # You can't send after switching protocols, or while waiting for a + # protocol switch + p = setup() + with pytest.raises(LocalProtocolError): + p.conn[CLIENT].send( + Request(method="GET", target="/", headers=[("Host", "a")]) + ) + p = setup() + p.send(SERVER, accept) + with pytest.raises(LocalProtocolError): + p.conn[SERVER].send(Data(data=b"123")) + + +def test_close_simple() -> None: + # Just immediately closing a new connection without anything having + # happened yet. + for (who_shot_first, who_shot_second) in [(CLIENT, SERVER), (SERVER, CLIENT)]: + + def setup() -> ConnectionPair: + p = ConnectionPair() + p.send(who_shot_first, ConnectionClosed()) + for conn in p.conns: + assert conn.states == { + who_shot_first: CLOSED, + who_shot_second: MUST_CLOSE, + } + return p + + # You can keep putting b"" into a closed connection, and you keep + # getting ConnectionClosed() out: + p = setup() + assert p.conn[who_shot_second].next_event() == ConnectionClosed() + assert p.conn[who_shot_second].next_event() == ConnectionClosed() + p.conn[who_shot_second].receive_data(b"") + assert p.conn[who_shot_second].next_event() == ConnectionClosed() + # Second party can close... + p = setup() + p.send(who_shot_second, ConnectionClosed()) + for conn in p.conns: + assert conn.our_state is CLOSED + assert conn.their_state is CLOSED + # But trying to receive new data on a closed connection is a + # RuntimeError (not ProtocolError, because the problem here isn't + # violation of HTTP, it's violation of physics) + p = setup() + with pytest.raises(RuntimeError): + p.conn[who_shot_second].receive_data(b"123") + # And receiving new data on a MUST_CLOSE connection is a ProtocolError + p = setup() + p.conn[who_shot_first].receive_data(b"GET") + with pytest.raises(RemoteProtocolError): + p.conn[who_shot_first].next_event() + + +def test_close_different_states() -> None: + req = [ + Request(method="GET", target="/foo", headers=[("Host", "a")]), + EndOfMessage(), + ] + resp = [ + Response(status_code=200, headers=[(b"transfer-encoding", b"chunked")]), + EndOfMessage(), + ] + + # Client before request + p = ConnectionPair() + p.send(CLIENT, ConnectionClosed()) + for conn in p.conns: + assert conn.states == {CLIENT: CLOSED, SERVER: MUST_CLOSE} + + # Client after request + p = ConnectionPair() + p.send(CLIENT, req) + p.send(CLIENT, ConnectionClosed()) + for conn in p.conns: + assert conn.states == {CLIENT: CLOSED, SERVER: SEND_RESPONSE} + + # Server after request -> not allowed + p = ConnectionPair() + p.send(CLIENT, req) + with pytest.raises(LocalProtocolError): + p.conn[SERVER].send(ConnectionClosed()) + p.conn[CLIENT].receive_data(b"") + with pytest.raises(RemoteProtocolError): + p.conn[CLIENT].next_event() + + # Server after response + p = ConnectionPair() + p.send(CLIENT, req) + p.send(SERVER, resp) + p.send(SERVER, ConnectionClosed()) + for conn in p.conns: + assert conn.states == {CLIENT: MUST_CLOSE, SERVER: CLOSED} + + # Both after closing (ConnectionClosed() is idempotent) + p = ConnectionPair() + p.send(CLIENT, req) + p.send(SERVER, resp) + p.send(CLIENT, ConnectionClosed()) + p.send(SERVER, ConnectionClosed()) + p.send(CLIENT, ConnectionClosed()) + p.send(SERVER, ConnectionClosed()) + + # In the middle of sending -> not allowed + p = ConnectionPair() + p.send( + CLIENT, + Request( + method="GET", target="/", headers=[("Host", "a"), ("Content-Length", "10")] + ), + ) + with pytest.raises(LocalProtocolError): + p.conn[CLIENT].send(ConnectionClosed()) + p.conn[SERVER].receive_data(b"") + with pytest.raises(RemoteProtocolError): + p.conn[SERVER].next_event() + + +# Receive several requests and then client shuts down their side of the +# connection; we can respond to each +def test_pipelined_close() -> None: + c = Connection(SERVER) + # 2 requests then a close + c.receive_data( + b"GET /1 HTTP/1.1\r\nHost: a.com\r\nContent-Length: 5\r\n\r\n" + b"12345" + b"GET /2 HTTP/1.1\r\nHost: a.com\r\nContent-Length: 5\r\n\r\n" + b"67890" + ) + c.receive_data(b"") + assert get_all_events(c) == [ + Request( + method="GET", + target="/1", + headers=[("host", "a.com"), ("content-length", "5")], + ), + Data(data=b"12345"), + EndOfMessage(), + ] + assert c.states[CLIENT] is DONE + c.send(Response(status_code=200, headers=[])) # type: ignore[arg-type] + c.send(EndOfMessage()) + assert c.states[SERVER] is DONE + c.start_next_cycle() + assert get_all_events(c) == [ + Request( + method="GET", + target="/2", + headers=[("host", "a.com"), ("content-length", "5")], + ), + Data(data=b"67890"), + EndOfMessage(), + ConnectionClosed(), + ] + assert c.states == {CLIENT: CLOSED, SERVER: SEND_RESPONSE} + c.send(Response(status_code=200, headers=[])) # type: ignore[arg-type] + c.send(EndOfMessage()) + assert c.states == {CLIENT: CLOSED, SERVER: MUST_CLOSE} + c.send(ConnectionClosed()) + assert c.states == {CLIENT: CLOSED, SERVER: CLOSED} + + +def test_sendfile() -> None: + class SendfilePlaceholder: + def __len__(self) -> int: + return 10 + + placeholder = SendfilePlaceholder() + + def setup( + header: Tuple[str, str], http_version: str + ) -> Tuple[Connection, Optional[List[bytes]]]: + c = Connection(SERVER) + receive_and_get( + c, "GET / HTTP/{}\r\nHost: a\r\n\r\n".format(http_version).encode("ascii") + ) + headers = [] + if header: + headers.append(header) + c.send(Response(status_code=200, headers=headers)) + return c, c.send_with_data_passthrough(Data(data=placeholder)) # type: ignore + + c, data = setup(("Content-Length", "10"), "1.1") + assert data == [placeholder] # type: ignore + # Raises an error if the connection object doesn't think we've sent + # exactly 10 bytes + c.send(EndOfMessage()) + + _, data = setup(("Transfer-Encoding", "chunked"), "1.1") + assert placeholder in data # type: ignore + data[data.index(placeholder)] = b"x" * 10 # type: ignore + assert b"".join(data) == b"a\r\nxxxxxxxxxx\r\n" # type: ignore + + c, data = setup(None, "1.0") # type: ignore + assert data == [placeholder] # type: ignore + assert c.our_state is SEND_BODY + + +def test_errors() -> None: + # After a receive error, you can't receive + for role in [CLIENT, SERVER]: + c = Connection(our_role=role) + c.receive_data(b"gibberish\r\n\r\n") + with pytest.raises(RemoteProtocolError): + c.next_event() + # Now any attempt to receive continues to raise + assert c.their_state is ERROR + assert c.our_state is not ERROR + print(c._cstate.states) + with pytest.raises(RemoteProtocolError): + c.next_event() + # But we can still yell at the client for sending us gibberish + if role is SERVER: + assert ( + c.send(Response(status_code=400, headers=[])) # type: ignore[arg-type] + == b"HTTP/1.1 400 \r\nConnection: close\r\n\r\n" + ) + + # After an error sending, you can no longer send + # (This is especially important for things like content-length errors, + # where there's complex internal state being modified) + def conn(role: Type[Sentinel]) -> Connection: + c = Connection(our_role=role) + if role is SERVER: + # Put it into the state where it *could* send a response... + receive_and_get(c, b"GET / HTTP/1.0\r\n\r\n") + assert c.our_state is SEND_RESPONSE + return c + + for role in [CLIENT, SERVER]: + if role is CLIENT: + # This HTTP/1.0 request won't be detected as bad until after we go + # through the state machine and hit the writing code + good = Request(method="GET", target="/", headers=[("Host", "example.com")]) + bad = Request( + method="GET", + target="/", + headers=[("Host", "example.com")], + http_version="1.0", + ) + elif role is SERVER: + good = Response(status_code=200, headers=[]) # type: ignore[arg-type,assignment] + bad = Response(status_code=200, headers=[], http_version="1.0") # type: ignore[arg-type,assignment] + # Make sure 'good' actually is good + c = conn(role) + c.send(good) + assert c.our_state is not ERROR + # Do that again, but this time sending 'bad' first + c = conn(role) + with pytest.raises(LocalProtocolError): + c.send(bad) + assert c.our_state is ERROR + assert c.their_state is not ERROR + # Now 'good' is not so good + with pytest.raises(LocalProtocolError): + c.send(good) + + # And check send_failed() too + c = conn(role) + c.send_failed() + assert c.our_state is ERROR + assert c.their_state is not ERROR + # This is idempotent + c.send_failed() + assert c.our_state is ERROR + assert c.their_state is not ERROR + + +def test_idle_receive_nothing() -> None: + # At one point this incorrectly raised an error + for role in [CLIENT, SERVER]: + c = Connection(role) + assert c.next_event() is NEED_DATA + + +def test_connection_drop() -> None: + c = Connection(SERVER) + c.receive_data(b"GET /") + assert c.next_event() is NEED_DATA + c.receive_data(b"") + with pytest.raises(RemoteProtocolError): + c.next_event() + + +def test_408_request_timeout() -> None: + # Should be able to send this spontaneously as a server without seeing + # anything from client + p = ConnectionPair() + p.send(SERVER, Response(status_code=408, headers=[(b"connection", b"close")])) + + +# This used to raise IndexError +def test_empty_request() -> None: + c = Connection(SERVER) + c.receive_data(b"\r\n") + with pytest.raises(RemoteProtocolError): + c.next_event() + + +# This used to raise IndexError +def test_empty_response() -> None: + c = Connection(CLIENT) + c.send(Request(method="GET", target="/", headers=[("Host", "a")])) + c.receive_data(b"\r\n") + with pytest.raises(RemoteProtocolError): + c.next_event() + + +@pytest.mark.parametrize( + "data", + [ + b"\x00", + b"\x20", + b"\x16\x03\x01\x00\xa5", # Typical start of a TLS Client Hello + ], +) +def test_early_detection_of_invalid_request(data: bytes) -> None: + c = Connection(SERVER) + # Early detection should occur before even receiving a `\r\n` + c.receive_data(data) + with pytest.raises(RemoteProtocolError): + c.next_event() + + +@pytest.mark.parametrize( + "data", + [ + b"\x00", + b"\x20", + b"\x16\x03\x03\x00\x31", # Typical start of a TLS Server Hello + ], +) +def test_early_detection_of_invalid_response(data: bytes) -> None: + c = Connection(CLIENT) + # Early detection should occur before even receiving a `\r\n` + c.receive_data(data) + with pytest.raises(RemoteProtocolError): + c.next_event() + + +# This used to give different headers for HEAD and GET. +# The correct way to handle HEAD is to put whatever headers we *would* have +# put if it were a GET -- even though we know that for HEAD, those headers +# will be ignored. +def test_HEAD_framing_headers() -> None: + def setup(method: bytes, http_version: bytes) -> Connection: + c = Connection(SERVER) + c.receive_data( + method + b" / HTTP/" + http_version + b"\r\n" + b"Host: example.com\r\n\r\n" + ) + assert type(c.next_event()) is Request + assert type(c.next_event()) is EndOfMessage + return c + + for method in [b"GET", b"HEAD"]: + # No Content-Length, HTTP/1.1 peer, should use chunked + c = setup(method, b"1.1") + assert ( + c.send(Response(status_code=200, headers=[])) == b"HTTP/1.1 200 \r\n" # type: ignore[arg-type] + b"Transfer-Encoding: chunked\r\n\r\n" + ) + + # No Content-Length, HTTP/1.0 peer, frame with connection: close + c = setup(method, b"1.0") + assert ( + c.send(Response(status_code=200, headers=[])) == b"HTTP/1.1 200 \r\n" # type: ignore[arg-type] + b"Connection: close\r\n\r\n" + ) + + # Content-Length + Transfer-Encoding, TE wins + c = setup(method, b"1.1") + assert ( + c.send( + Response( + status_code=200, + headers=[ + ("Content-Length", "100"), + ("Transfer-Encoding", "chunked"), + ], + ) + ) + == b"HTTP/1.1 200 \r\n" + b"Transfer-Encoding: chunked\r\n\r\n" + ) + + +def test_special_exceptions_for_lost_connection_in_message_body() -> None: + c = Connection(SERVER) + c.receive_data( + b"POST / HTTP/1.1\r\n" b"Host: example.com\r\n" b"Content-Length: 100\r\n\r\n" + ) + assert type(c.next_event()) is Request + assert c.next_event() is NEED_DATA + c.receive_data(b"12345") + assert c.next_event() == Data(data=b"12345") + c.receive_data(b"") + with pytest.raises(RemoteProtocolError) as excinfo: + c.next_event() + assert "received 5 bytes" in str(excinfo.value) + assert "expected 100" in str(excinfo.value) + + c = Connection(SERVER) + c.receive_data( + b"POST / HTTP/1.1\r\n" + b"Host: example.com\r\n" + b"Transfer-Encoding: chunked\r\n\r\n" + ) + assert type(c.next_event()) is Request + assert c.next_event() is NEED_DATA + c.receive_data(b"8\r\n012345") + assert c.next_event().data == b"012345" # type: ignore + c.receive_data(b"") + with pytest.raises(RemoteProtocolError) as excinfo: + c.next_event() + assert "incomplete chunked read" in str(excinfo.value) diff --git a/venv/lib/python3.11/site-packages/h11/tests/test_events.py b/venv/lib/python3.11/site-packages/h11/tests/test_events.py new file mode 100644 index 0000000..bc6c313 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/test_events.py @@ -0,0 +1,150 @@ +from http import HTTPStatus + +import pytest + +from .. import _events +from .._events import ( + ConnectionClosed, + Data, + EndOfMessage, + Event, + InformationalResponse, + Request, + Response, +) +from .._util import LocalProtocolError + + +def test_events() -> None: + with pytest.raises(LocalProtocolError): + # Missing Host: + req = Request( + method="GET", target="/", headers=[("a", "b")], http_version="1.1" + ) + # But this is okay (HTTP/1.0) + req = Request(method="GET", target="/", headers=[("a", "b")], http_version="1.0") + # fields are normalized + assert req.method == b"GET" + assert req.target == b"/" + assert req.headers == [(b"a", b"b")] + assert req.http_version == b"1.0" + + # This is also okay -- has a Host (with weird capitalization, which is ok) + req = Request( + method="GET", + target="/", + headers=[("a", "b"), ("hOSt", "example.com")], + http_version="1.1", + ) + # we normalize header capitalization + assert req.headers == [(b"a", b"b"), (b"host", b"example.com")] + + # Multiple host is bad too + with pytest.raises(LocalProtocolError): + req = Request( + method="GET", + target="/", + headers=[("Host", "a"), ("Host", "a")], + http_version="1.1", + ) + # Even for HTTP/1.0 + with pytest.raises(LocalProtocolError): + req = Request( + method="GET", + target="/", + headers=[("Host", "a"), ("Host", "a")], + http_version="1.0", + ) + + # Header values are validated + for bad_char in "\x00\r\n\f\v": + with pytest.raises(LocalProtocolError): + req = Request( + method="GET", + target="/", + headers=[("Host", "a"), ("Foo", "asd" + bad_char)], + http_version="1.0", + ) + + # But for compatibility we allow non-whitespace control characters, even + # though they're forbidden by the spec. + Request( + method="GET", + target="/", + headers=[("Host", "a"), ("Foo", "asd\x01\x02\x7f")], + http_version="1.0", + ) + + # Request target is validated + for bad_byte in b"\x00\x20\x7f\xee": + target = bytearray(b"/") + target.append(bad_byte) + with pytest.raises(LocalProtocolError): + Request( + method="GET", target=target, headers=[("Host", "a")], http_version="1.1" + ) + + # Request method is validated + with pytest.raises(LocalProtocolError): + Request( + method="GET / HTTP/1.1", + target=target, + headers=[("Host", "a")], + http_version="1.1", + ) + + ir = InformationalResponse(status_code=100, headers=[("Host", "a")]) + assert ir.status_code == 100 + assert ir.headers == [(b"host", b"a")] + assert ir.http_version == b"1.1" + + with pytest.raises(LocalProtocolError): + InformationalResponse(status_code=200, headers=[("Host", "a")]) + + resp = Response(status_code=204, headers=[], http_version="1.0") # type: ignore[arg-type] + assert resp.status_code == 204 + assert resp.headers == [] + assert resp.http_version == b"1.0" + + with pytest.raises(LocalProtocolError): + resp = Response(status_code=100, headers=[], http_version="1.0") # type: ignore[arg-type] + + with pytest.raises(LocalProtocolError): + Response(status_code="100", headers=[], http_version="1.0") # type: ignore[arg-type] + + with pytest.raises(LocalProtocolError): + InformationalResponse(status_code=b"100", headers=[], http_version="1.0") # type: ignore[arg-type] + + d = Data(data=b"asdf") + assert d.data == b"asdf" + + eom = EndOfMessage() + assert eom.headers == [] + + cc = ConnectionClosed() + assert repr(cc) == "ConnectionClosed()" + + +def test_intenum_status_code() -> None: + # https://github.com/python-hyper/h11/issues/72 + + r = Response(status_code=HTTPStatus.OK, headers=[], http_version="1.0") # type: ignore[arg-type] + assert r.status_code == HTTPStatus.OK + assert type(r.status_code) is not type(HTTPStatus.OK) + assert type(r.status_code) is int + + +def test_header_casing() -> None: + r = Request( + method="GET", + target="/", + headers=[("Host", "example.org"), ("Connection", "keep-alive")], + http_version="1.1", + ) + assert len(r.headers) == 2 + assert r.headers[0] == (b"host", b"example.org") + assert r.headers == [(b"host", b"example.org"), (b"connection", b"keep-alive")] + assert r.headers.raw_items() == [ + (b"Host", b"example.org"), + (b"Connection", b"keep-alive"), + ] diff --git a/venv/lib/python3.11/site-packages/h11/tests/test_headers.py b/venv/lib/python3.11/site-packages/h11/tests/test_headers.py new file mode 100644 index 0000000..ba53d08 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/test_headers.py @@ -0,0 +1,157 @@ +import pytest + +from .._events import Request +from .._headers import ( + get_comma_header, + has_expect_100_continue, + Headers, + normalize_and_validate, + set_comma_header, +) +from .._util import LocalProtocolError + + +def test_normalize_and_validate() -> None: + assert normalize_and_validate([("foo", "bar")]) == [(b"foo", b"bar")] + assert normalize_and_validate([(b"foo", b"bar")]) == [(b"foo", b"bar")] + + # no leading/trailing whitespace in names + with pytest.raises(LocalProtocolError): + normalize_and_validate([(b"foo ", "bar")]) + with pytest.raises(LocalProtocolError): + normalize_and_validate([(b" foo", "bar")]) + + # no weird characters in names + with pytest.raises(LocalProtocolError) as excinfo: + normalize_and_validate([(b"foo bar", b"baz")]) + assert "foo bar" in str(excinfo.value) + with pytest.raises(LocalProtocolError): + normalize_and_validate([(b"foo\x00bar", b"baz")]) + # Not even 8-bit characters: + with pytest.raises(LocalProtocolError): + normalize_and_validate([(b"foo\xffbar", b"baz")]) + # And not even the control characters we allow in values: + with pytest.raises(LocalProtocolError): + normalize_and_validate([(b"foo\x01bar", b"baz")]) + + # no return or NUL characters in values + with pytest.raises(LocalProtocolError) as excinfo: + normalize_and_validate([("foo", "bar\rbaz")]) + assert "bar\\rbaz" in str(excinfo.value) + with pytest.raises(LocalProtocolError): + normalize_and_validate([("foo", "bar\nbaz")]) + with pytest.raises(LocalProtocolError): + normalize_and_validate([("foo", "bar\x00baz")]) + # no leading/trailing whitespace + with pytest.raises(LocalProtocolError): + normalize_and_validate([("foo", "barbaz ")]) + with pytest.raises(LocalProtocolError): + normalize_and_validate([("foo", " barbaz")]) + with pytest.raises(LocalProtocolError): + normalize_and_validate([("foo", "barbaz\t")]) + with pytest.raises(LocalProtocolError): + normalize_and_validate([("foo", "\tbarbaz")]) + + # content-length + assert normalize_and_validate([("Content-Length", "1")]) == [ + (b"content-length", b"1") + ] + with pytest.raises(LocalProtocolError): + normalize_and_validate([("Content-Length", "asdf")]) + with pytest.raises(LocalProtocolError): + normalize_and_validate([("Content-Length", "1x")]) + with pytest.raises(LocalProtocolError): + normalize_and_validate([("Content-Length", "1"), ("Content-Length", "2")]) + assert normalize_and_validate( + [("Content-Length", "0"), ("Content-Length", "0")] + ) == [(b"content-length", b"0")] + assert normalize_and_validate([("Content-Length", "0 , 0")]) == [ + (b"content-length", b"0") + ] + with pytest.raises(LocalProtocolError): + normalize_and_validate( + [("Content-Length", "1"), ("Content-Length", "1"), ("Content-Length", "2")] + ) + with pytest.raises(LocalProtocolError): + normalize_and_validate([("Content-Length", "1 , 1,2")]) + + # transfer-encoding + assert normalize_and_validate([("Transfer-Encoding", "chunked")]) == [ + (b"transfer-encoding", b"chunked") + ] + assert normalize_and_validate([("Transfer-Encoding", "cHuNkEd")]) == [ + (b"transfer-encoding", b"chunked") + ] + with pytest.raises(LocalProtocolError) as excinfo: + normalize_and_validate([("Transfer-Encoding", "gzip")]) + assert excinfo.value.error_status_hint == 501 # Not Implemented + with pytest.raises(LocalProtocolError) as excinfo: + normalize_and_validate( + [("Transfer-Encoding", "chunked"), ("Transfer-Encoding", "gzip")] + ) + assert excinfo.value.error_status_hint == 501 # Not Implemented + + +def test_get_set_comma_header() -> None: + headers = normalize_and_validate( + [ + ("Connection", "close"), + ("whatever", "something"), + ("connectiON", "fOo,, , BAR"), + ] + ) + + assert get_comma_header(headers, b"connection") == [b"close", b"foo", b"bar"] + + headers = set_comma_header(headers, b"newthing", ["a", "b"]) # type: ignore + + with pytest.raises(LocalProtocolError): + set_comma_header(headers, b"newthing", [" a", "b"]) # type: ignore + + assert headers == [ + (b"connection", b"close"), + (b"whatever", b"something"), + (b"connection", b"fOo,, , BAR"), + (b"newthing", b"a"), + (b"newthing", b"b"), + ] + + headers = set_comma_header(headers, b"whatever", ["different thing"]) # type: ignore + + assert headers == [ + (b"connection", b"close"), + (b"connection", b"fOo,, , BAR"), + (b"newthing", b"a"), + (b"newthing", b"b"), + (b"whatever", b"different thing"), + ] + + +def test_has_100_continue() -> None: + assert has_expect_100_continue( + Request( + method="GET", + target="/", + headers=[("Host", "example.com"), ("Expect", "100-continue")], + ) + ) + assert not has_expect_100_continue( + Request(method="GET", target="/", headers=[("Host", "example.com")]) + ) + # Case insensitive + assert has_expect_100_continue( + Request( + method="GET", + target="/", + headers=[("Host", "example.com"), ("Expect", "100-Continue")], + ) + ) + # Doesn't work in HTTP/1.0 + assert not has_expect_100_continue( + Request( + method="GET", + target="/", + headers=[("Host", "example.com"), ("Expect", "100-continue")], + http_version="1.0", + ) + ) diff --git a/venv/lib/python3.11/site-packages/h11/tests/test_helpers.py b/venv/lib/python3.11/site-packages/h11/tests/test_helpers.py new file mode 100644 index 0000000..c329c76 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/test_helpers.py @@ -0,0 +1,32 @@ +from .._events import ( + ConnectionClosed, + Data, + EndOfMessage, + Event, + InformationalResponse, + Request, + Response, +) +from .helpers import normalize_data_events + + +def test_normalize_data_events() -> None: + assert normalize_data_events( + [ + Data(data=bytearray(b"1")), + Data(data=b"2"), + Response(status_code=200, headers=[]), # type: ignore[arg-type] + Data(data=b"3"), + Data(data=b"4"), + EndOfMessage(), + Data(data=b"5"), + Data(data=b"6"), + Data(data=b"7"), + ] + ) == [ + Data(data=b"12"), + Response(status_code=200, headers=[]), # type: ignore[arg-type] + Data(data=b"34"), + EndOfMessage(), + Data(data=b"567"), + ] diff --git a/venv/lib/python3.11/site-packages/h11/tests/test_io.py b/venv/lib/python3.11/site-packages/h11/tests/test_io.py new file mode 100644 index 0000000..2b47c0e --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/test_io.py @@ -0,0 +1,572 @@ +from typing import Any, Callable, Generator, List + +import pytest + +from .._events import ( + ConnectionClosed, + Data, + EndOfMessage, + Event, + InformationalResponse, + Request, + Response, +) +from .._headers import Headers, normalize_and_validate +from .._readers import ( + _obsolete_line_fold, + ChunkedReader, + ContentLengthReader, + Http10Reader, + READERS, +) +from .._receivebuffer import ReceiveBuffer +from .._state import ( + CLIENT, + CLOSED, + DONE, + IDLE, + MIGHT_SWITCH_PROTOCOL, + MUST_CLOSE, + SEND_BODY, + SEND_RESPONSE, + SERVER, + SWITCHED_PROTOCOL, +) +from .._util import LocalProtocolError +from .._writers import ( + ChunkedWriter, + ContentLengthWriter, + Http10Writer, + write_any_response, + write_headers, + write_request, + WRITERS, +) +from .helpers import normalize_data_events + +SIMPLE_CASES = [ + ( + (CLIENT, IDLE), + Request( + method="GET", + target="/a", + headers=[("Host", "foo"), ("Connection", "close")], + ), + b"GET /a HTTP/1.1\r\nHost: foo\r\nConnection: close\r\n\r\n", + ), + ( + (SERVER, SEND_RESPONSE), + Response(status_code=200, headers=[("Connection", "close")], reason=b"OK"), + b"HTTP/1.1 200 OK\r\nConnection: close\r\n\r\n", + ), + ( + (SERVER, SEND_RESPONSE), + Response(status_code=200, headers=[], reason=b"OK"), # type: ignore[arg-type] + b"HTTP/1.1 200 OK\r\n\r\n", + ), + ( + (SERVER, SEND_RESPONSE), + InformationalResponse( + status_code=101, headers=[("Upgrade", "websocket")], reason=b"Upgrade" + ), + b"HTTP/1.1 101 Upgrade\r\nUpgrade: websocket\r\n\r\n", + ), + ( + (SERVER, SEND_RESPONSE), + InformationalResponse(status_code=101, headers=[], reason=b"Upgrade"), # type: ignore[arg-type] + b"HTTP/1.1 101 Upgrade\r\n\r\n", + ), +] + + +def dowrite(writer: Callable[..., None], obj: Any) -> bytes: + got_list: List[bytes] = [] + writer(obj, got_list.append) + return b"".join(got_list) + + +def tw(writer: Any, obj: Any, expected: Any) -> None: + got = dowrite(writer, obj) + assert got == expected + + +def makebuf(data: bytes) -> ReceiveBuffer: + buf = ReceiveBuffer() + buf += data + return buf + + +def tr(reader: Any, data: bytes, expected: Any) -> None: + def check(got: Any) -> None: + assert got == expected + # Headers should always be returned as bytes, not e.g. bytearray + # https://github.com/python-hyper/wsproto/pull/54#issuecomment-377709478 + for name, value in getattr(got, "headers", []): + assert type(name) is bytes + assert type(value) is bytes + + # Simple: consume whole thing + buf = makebuf(data) + check(reader(buf)) + assert not buf + + # Incrementally growing buffer + buf = ReceiveBuffer() + for i in range(len(data)): + assert reader(buf) is None + buf += data[i : i + 1] + check(reader(buf)) + + # Trailing data + buf = makebuf(data) + buf += b"trailing" + check(reader(buf)) + assert bytes(buf) == b"trailing" + + +def test_writers_simple() -> None: + for ((role, state), event, binary) in SIMPLE_CASES: + tw(WRITERS[role, state], event, binary) + + +def test_readers_simple() -> None: + for ((role, state), event, binary) in SIMPLE_CASES: + tr(READERS[role, state], binary, event) + + +def test_writers_unusual() -> None: + # Simple test of the write_headers utility routine + tw( + write_headers, + normalize_and_validate([("foo", "bar"), ("baz", "quux")]), + b"foo: bar\r\nbaz: quux\r\n\r\n", + ) + tw(write_headers, Headers([]), b"\r\n") + + # We understand HTTP/1.0, but we don't speak it + with pytest.raises(LocalProtocolError): + tw( + write_request, + Request( + method="GET", + target="/", + headers=[("Host", "foo"), ("Connection", "close")], + http_version="1.0", + ), + None, + ) + with pytest.raises(LocalProtocolError): + tw( + write_any_response, + Response( + status_code=200, headers=[("Connection", "close")], http_version="1.0" + ), + None, + ) + + +def test_readers_unusual() -> None: + # Reading HTTP/1.0 + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.0\r\nSome: header\r\n\r\n", + Request( + method="HEAD", + target="/foo", + headers=[("Some", "header")], + http_version="1.0", + ), + ) + + # check no-headers, since it's only legal with HTTP/1.0 + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.0\r\n\r\n", + Request(method="HEAD", target="/foo", headers=[], http_version="1.0"), # type: ignore[arg-type] + ) + + tr( + READERS[SERVER, SEND_RESPONSE], + b"HTTP/1.0 200 OK\r\nSome: header\r\n\r\n", + Response( + status_code=200, + headers=[("Some", "header")], + http_version="1.0", + reason=b"OK", + ), + ) + + # single-character header values (actually disallowed by the ABNF in RFC + # 7230 -- this is a bug in the standard that we originally copied...) + tr( + READERS[SERVER, SEND_RESPONSE], + b"HTTP/1.0 200 OK\r\n" b"Foo: a a a a a \r\n\r\n", + Response( + status_code=200, + headers=[("Foo", "a a a a a")], + http_version="1.0", + reason=b"OK", + ), + ) + + # Empty headers -- also legal + tr( + READERS[SERVER, SEND_RESPONSE], + b"HTTP/1.0 200 OK\r\n" b"Foo:\r\n\r\n", + Response( + status_code=200, headers=[("Foo", "")], http_version="1.0", reason=b"OK" + ), + ) + + tr( + READERS[SERVER, SEND_RESPONSE], + b"HTTP/1.0 200 OK\r\n" b"Foo: \t \t \r\n\r\n", + Response( + status_code=200, headers=[("Foo", "")], http_version="1.0", reason=b"OK" + ), + ) + + # Tolerate broken servers that leave off the response code + tr( + READERS[SERVER, SEND_RESPONSE], + b"HTTP/1.0 200\r\n" b"Foo: bar\r\n\r\n", + Response( + status_code=200, headers=[("Foo", "bar")], http_version="1.0", reason=b"" + ), + ) + + # Tolerate headers line endings (\r\n and \n) + # \n\r\b between headers and body + tr( + READERS[SERVER, SEND_RESPONSE], + b"HTTP/1.1 200 OK\r\nSomeHeader: val\n\r\n", + Response( + status_code=200, + headers=[("SomeHeader", "val")], + http_version="1.1", + reason="OK", + ), + ) + + # delimited only with \n + tr( + READERS[SERVER, SEND_RESPONSE], + b"HTTP/1.1 200 OK\nSomeHeader1: val1\nSomeHeader2: val2\n\n", + Response( + status_code=200, + headers=[("SomeHeader1", "val1"), ("SomeHeader2", "val2")], + http_version="1.1", + reason="OK", + ), + ) + + # mixed \r\n and \n + tr( + READERS[SERVER, SEND_RESPONSE], + b"HTTP/1.1 200 OK\r\nSomeHeader1: val1\nSomeHeader2: val2\n\r\n", + Response( + status_code=200, + headers=[("SomeHeader1", "val1"), ("SomeHeader2", "val2")], + http_version="1.1", + reason="OK", + ), + ) + + # obsolete line folding + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.1\r\n" + b"Host: example.com\r\n" + b"Some: multi-line\r\n" + b" header\r\n" + b"\tnonsense\r\n" + b" \t \t\tI guess\r\n" + b"Connection: close\r\n" + b"More-nonsense: in the\r\n" + b" last header \r\n\r\n", + Request( + method="HEAD", + target="/foo", + headers=[ + ("Host", "example.com"), + ("Some", "multi-line header nonsense I guess"), + ("Connection", "close"), + ("More-nonsense", "in the last header"), + ], + ), + ) + + with pytest.raises(LocalProtocolError): + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.1\r\n" b" folded: line\r\n\r\n", + None, + ) + + with pytest.raises(LocalProtocolError): + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.1\r\n" b"foo : line\r\n\r\n", + None, + ) + with pytest.raises(LocalProtocolError): + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.1\r\n" b"foo\t: line\r\n\r\n", + None, + ) + with pytest.raises(LocalProtocolError): + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.1\r\n" b"foo\t: line\r\n\r\n", + None, + ) + with pytest.raises(LocalProtocolError): + tr(READERS[CLIENT, IDLE], b"HEAD /foo HTTP/1.1\r\n" b": line\r\n\r\n", None) + + +def test__obsolete_line_fold_bytes() -> None: + # _obsolete_line_fold has a defensive cast to bytearray, which is + # necessary to protect against O(n^2) behavior in case anyone ever passes + # in regular bytestrings... but right now we never pass in regular + # bytestrings. so this test just exists to get some coverage on that + # defensive cast. + assert list(_obsolete_line_fold([b"aaa", b"bbb", b" ccc", b"ddd"])) == [ + b"aaa", + bytearray(b"bbb ccc"), + b"ddd", + ] + + +def _run_reader_iter( + reader: Any, buf: bytes, do_eof: bool +) -> Generator[Any, None, None]: + while True: + event = reader(buf) + if event is None: + break + yield event + # body readers have undefined behavior after returning EndOfMessage, + # because this changes the state so they don't get called again + if type(event) is EndOfMessage: + break + if do_eof: + assert not buf + yield reader.read_eof() + + +def _run_reader(*args: Any) -> List[Event]: + events = list(_run_reader_iter(*args)) + return normalize_data_events(events) + + +def t_body_reader(thunk: Any, data: bytes, expected: Any, do_eof: bool = False) -> None: + # Simple: consume whole thing + print("Test 1") + buf = makebuf(data) + assert _run_reader(thunk(), buf, do_eof) == expected + + # Incrementally growing buffer + print("Test 2") + reader = thunk() + buf = ReceiveBuffer() + events = [] + for i in range(len(data)): + events += _run_reader(reader, buf, False) + buf += data[i : i + 1] + events += _run_reader(reader, buf, do_eof) + assert normalize_data_events(events) == expected + + is_complete = any(type(event) is EndOfMessage for event in expected) + if is_complete and not do_eof: + buf = makebuf(data + b"trailing") + assert _run_reader(thunk(), buf, False) == expected + + +def test_ContentLengthReader() -> None: + t_body_reader(lambda: ContentLengthReader(0), b"", [EndOfMessage()]) + + t_body_reader( + lambda: ContentLengthReader(10), + b"0123456789", + [Data(data=b"0123456789"), EndOfMessage()], + ) + + +def test_Http10Reader() -> None: + t_body_reader(Http10Reader, b"", [EndOfMessage()], do_eof=True) + t_body_reader(Http10Reader, b"asdf", [Data(data=b"asdf")], do_eof=False) + t_body_reader( + Http10Reader, b"asdf", [Data(data=b"asdf"), EndOfMessage()], do_eof=True + ) + + +def test_ChunkedReader() -> None: + t_body_reader(ChunkedReader, b"0\r\n\r\n", [EndOfMessage()]) + + t_body_reader( + ChunkedReader, + b"0\r\nSome: header\r\n\r\n", + [EndOfMessage(headers=[("Some", "header")])], + ) + + t_body_reader( + ChunkedReader, + b"5\r\n01234\r\n" + + b"10\r\n0123456789abcdef\r\n" + + b"0\r\n" + + b"Some: header\r\n\r\n", + [ + Data(data=b"012340123456789abcdef"), + EndOfMessage(headers=[("Some", "header")]), + ], + ) + + t_body_reader( + ChunkedReader, + b"5\r\n01234\r\n" + b"10\r\n0123456789abcdef\r\n" + b"0\r\n\r\n", + [Data(data=b"012340123456789abcdef"), EndOfMessage()], + ) + + # handles upper and lowercase hex + t_body_reader( + ChunkedReader, + b"aA\r\n" + b"x" * 0xAA + b"\r\n" + b"0\r\n\r\n", + [Data(data=b"x" * 0xAA), EndOfMessage()], + ) + + # refuses arbitrarily long chunk integers + with pytest.raises(LocalProtocolError): + # Technically this is legal HTTP/1.1, but we refuse to process chunk + # sizes that don't fit into 20 characters of hex + t_body_reader(ChunkedReader, b"9" * 100 + b"\r\nxxx", [Data(data=b"xxx")]) + + # refuses garbage in the chunk count + with pytest.raises(LocalProtocolError): + t_body_reader(ChunkedReader, b"10\x00\r\nxxx", None) + + # handles (and discards) "chunk extensions" omg wtf + t_body_reader( + ChunkedReader, + b"5; hello=there\r\n" + + b"xxxxx" + + b"\r\n" + + b'0; random="junk"; some=more; canbe=lonnnnngg\r\n\r\n', + [Data(data=b"xxxxx"), EndOfMessage()], + ) + + t_body_reader( + ChunkedReader, + b"5 \r\n01234\r\n" + b"0\r\n\r\n", + [Data(data=b"01234"), EndOfMessage()], + ) + + +def test_ContentLengthWriter() -> None: + w = ContentLengthWriter(5) + assert dowrite(w, Data(data=b"123")) == b"123" + assert dowrite(w, Data(data=b"45")) == b"45" + assert dowrite(w, EndOfMessage()) == b"" + + w = ContentLengthWriter(5) + with pytest.raises(LocalProtocolError): + dowrite(w, Data(data=b"123456")) + + w = ContentLengthWriter(5) + dowrite(w, Data(data=b"123")) + with pytest.raises(LocalProtocolError): + dowrite(w, Data(data=b"456")) + + w = ContentLengthWriter(5) + dowrite(w, Data(data=b"123")) + with pytest.raises(LocalProtocolError): + dowrite(w, EndOfMessage()) + + w = ContentLengthWriter(5) + dowrite(w, Data(data=b"123")) == b"123" + dowrite(w, Data(data=b"45")) == b"45" + with pytest.raises(LocalProtocolError): + dowrite(w, EndOfMessage(headers=[("Etag", "asdf")])) + + +def test_ChunkedWriter() -> None: + w = ChunkedWriter() + assert dowrite(w, Data(data=b"aaa")) == b"3\r\naaa\r\n" + assert dowrite(w, Data(data=b"a" * 20)) == b"14\r\n" + b"a" * 20 + b"\r\n" + + assert dowrite(w, Data(data=b"")) == b"" + + assert dowrite(w, EndOfMessage()) == b"0\r\n\r\n" + + assert ( + dowrite(w, EndOfMessage(headers=[("Etag", "asdf"), ("a", "b")])) + == b"0\r\nEtag: asdf\r\na: b\r\n\r\n" + ) + + +def test_Http10Writer() -> None: + w = Http10Writer() + assert dowrite(w, Data(data=b"1234")) == b"1234" + assert dowrite(w, EndOfMessage()) == b"" + + with pytest.raises(LocalProtocolError): + dowrite(w, EndOfMessage(headers=[("Etag", "asdf")])) + + +def test_reject_garbage_after_request_line() -> None: + with pytest.raises(LocalProtocolError): + tr(READERS[SERVER, SEND_RESPONSE], b"HTTP/1.0 200 OK\x00xxxx\r\n\r\n", None) + + +def test_reject_garbage_after_response_line() -> None: + with pytest.raises(LocalProtocolError): + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.1 xxxxxx\r\n" b"Host: a\r\n\r\n", + None, + ) + + +def test_reject_garbage_in_header_line() -> None: + with pytest.raises(LocalProtocolError): + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.1\r\n" b"Host: foo\x00bar\r\n\r\n", + None, + ) + + +def test_reject_non_vchar_in_path() -> None: + for bad_char in b"\x00\x20\x7f\xee": + message = bytearray(b"HEAD /") + message.append(bad_char) + message.extend(b" HTTP/1.1\r\nHost: foobar\r\n\r\n") + with pytest.raises(LocalProtocolError): + tr(READERS[CLIENT, IDLE], message, None) + + +# https://github.com/python-hyper/h11/issues/57 +def test_allow_some_garbage_in_cookies() -> None: + tr( + READERS[CLIENT, IDLE], + b"HEAD /foo HTTP/1.1\r\n" + b"Host: foo\r\n" + b"Set-Cookie: ___utmvafIumyLc=kUd\x01UpAt; path=/; Max-Age=900\r\n" + b"\r\n", + Request( + method="HEAD", + target="/foo", + headers=[ + ("Host", "foo"), + ("Set-Cookie", "___utmvafIumyLc=kUd\x01UpAt; path=/; Max-Age=900"), + ], + ), + ) + + +def test_host_comes_first() -> None: + tw( + write_headers, + normalize_and_validate([("foo", "bar"), ("Host", "example.com")]), + b"Host: example.com\r\nfoo: bar\r\n\r\n", + ) diff --git a/venv/lib/python3.11/site-packages/h11/tests/test_receivebuffer.py b/venv/lib/python3.11/site-packages/h11/tests/test_receivebuffer.py new file mode 100644 index 0000000..21a3870 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/test_receivebuffer.py @@ -0,0 +1,135 @@ +import re +from typing import Tuple + +import pytest + +from .._receivebuffer import ReceiveBuffer + + +def test_receivebuffer() -> None: + b = ReceiveBuffer() + assert not b + assert len(b) == 0 + assert bytes(b) == b"" + + b += b"123" + assert b + assert len(b) == 3 + assert bytes(b) == b"123" + + assert bytes(b) == b"123" + + assert b.maybe_extract_at_most(2) == b"12" + assert b + assert len(b) == 1 + assert bytes(b) == b"3" + + assert bytes(b) == b"3" + + assert b.maybe_extract_at_most(10) == b"3" + assert bytes(b) == b"" + + assert b.maybe_extract_at_most(10) is None + assert not b + + ################################################################ + # maybe_extract_until_next + ################################################################ + + b += b"123\n456\r\n789\r\n" + + assert b.maybe_extract_next_line() == b"123\n456\r\n" + assert bytes(b) == b"789\r\n" + + assert b.maybe_extract_next_line() == b"789\r\n" + assert bytes(b) == b"" + + b += b"12\r" + assert b.maybe_extract_next_line() is None + assert bytes(b) == b"12\r" + + b += b"345\n\r" + assert b.maybe_extract_next_line() is None + assert bytes(b) == b"12\r345\n\r" + + # here we stopped at the middle of b"\r\n" delimiter + + b += b"\n6789aaa123\r\n" + assert b.maybe_extract_next_line() == b"12\r345\n\r\n" + assert b.maybe_extract_next_line() == b"6789aaa123\r\n" + assert b.maybe_extract_next_line() is None + assert bytes(b) == b"" + + ################################################################ + # maybe_extract_lines + ################################################################ + + b += b"123\r\na: b\r\nfoo:bar\r\n\r\ntrailing" + lines = b.maybe_extract_lines() + assert lines == [b"123", b"a: b", b"foo:bar"] + assert bytes(b) == b"trailing" + + assert b.maybe_extract_lines() is None + + b += b"\r\n\r" + assert b.maybe_extract_lines() is None + + assert b.maybe_extract_at_most(100) == b"trailing\r\n\r" + assert not b + + # Empty body case (as happens at the end of chunked encoding if there are + # no trailing headers, e.g.) + b += b"\r\ntrailing" + assert b.maybe_extract_lines() == [] + assert bytes(b) == b"trailing" + + +@pytest.mark.parametrize( + "data", + [ + pytest.param( + ( + b"HTTP/1.1 200 OK\r\n", + b"Content-type: text/plain\r\n", + b"Connection: close\r\n", + b"\r\n", + b"Some body", + ), + id="with_crlf_delimiter", + ), + pytest.param( + ( + b"HTTP/1.1 200 OK\n", + b"Content-type: text/plain\n", + b"Connection: close\n", + b"\n", + b"Some body", + ), + id="with_lf_only_delimiter", + ), + pytest.param( + ( + b"HTTP/1.1 200 OK\n", + b"Content-type: text/plain\r\n", + b"Connection: close\n", + b"\n", + b"Some body", + ), + id="with_mixed_crlf_and_lf", + ), + ], +) +def test_receivebuffer_for_invalid_delimiter(data: Tuple[bytes]) -> None: + b = ReceiveBuffer() + + for line in data: + b += line + + lines = b.maybe_extract_lines() + + assert lines == [ + b"HTTP/1.1 200 OK", + b"Content-type: text/plain", + b"Connection: close", + ] + assert bytes(b) == b"Some body" diff --git a/venv/lib/python3.11/site-packages/h11/tests/test_state.py b/venv/lib/python3.11/site-packages/h11/tests/test_state.py new file mode 100644 index 0000000..bc974e6 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/test_state.py @@ -0,0 +1,271 @@ +import pytest + +from .._events import ( + ConnectionClosed, + Data, + EndOfMessage, + Event, + InformationalResponse, + Request, + Response, +) +from .._state import ( + _SWITCH_CONNECT, + _SWITCH_UPGRADE, + CLIENT, + CLOSED, + ConnectionState, + DONE, + IDLE, + MIGHT_SWITCH_PROTOCOL, + MUST_CLOSE, + SEND_BODY, + SEND_RESPONSE, + SERVER, + SWITCHED_PROTOCOL, +) +from .._util import LocalProtocolError + + +def test_ConnectionState() -> None: + cs = ConnectionState() + + # Basic event-triggered transitions + + assert cs.states == {CLIENT: IDLE, SERVER: IDLE} + + cs.process_event(CLIENT, Request) + # The SERVER-Request special case: + assert cs.states == {CLIENT: SEND_BODY, SERVER: SEND_RESPONSE} + + # Illegal transitions raise an error and nothing happens + with pytest.raises(LocalProtocolError): + cs.process_event(CLIENT, Request) + assert cs.states == {CLIENT: SEND_BODY, SERVER: SEND_RESPONSE} + + cs.process_event(SERVER, InformationalResponse) + assert cs.states == {CLIENT: SEND_BODY, SERVER: SEND_RESPONSE} + + cs.process_event(SERVER, Response) + assert cs.states == {CLIENT: SEND_BODY, SERVER: SEND_BODY} + + cs.process_event(CLIENT, EndOfMessage) + cs.process_event(SERVER, EndOfMessage) + assert cs.states == {CLIENT: DONE, SERVER: DONE} + + # State-triggered transition + + cs.process_event(SERVER, ConnectionClosed) + assert cs.states == {CLIENT: MUST_CLOSE, SERVER: CLOSED} + + +def test_ConnectionState_keep_alive() -> None: + # keep_alive = False + cs = ConnectionState() + cs.process_event(CLIENT, Request) + cs.process_keep_alive_disabled() + cs.process_event(CLIENT, EndOfMessage) + assert cs.states == {CLIENT: MUST_CLOSE, SERVER: SEND_RESPONSE} + + cs.process_event(SERVER, Response) + cs.process_event(SERVER, EndOfMessage) + assert cs.states == {CLIENT: MUST_CLOSE, SERVER: MUST_CLOSE} + + +def test_ConnectionState_keep_alive_in_DONE() -> None: + # Check that if keep_alive is disabled when the CLIENT is already in DONE, + # then this is sufficient to immediately trigger the DONE -> MUST_CLOSE + # transition + cs = ConnectionState() + cs.process_event(CLIENT, Request) + cs.process_event(CLIENT, EndOfMessage) + assert cs.states[CLIENT] is DONE + cs.process_keep_alive_disabled() + assert cs.states[CLIENT] is MUST_CLOSE + + +def test_ConnectionState_switch_denied() -> None: + for switch_type in (_SWITCH_CONNECT, _SWITCH_UPGRADE): + for deny_early in (True, False): + cs = ConnectionState() + cs.process_client_switch_proposal(switch_type) + cs.process_event(CLIENT, Request) + cs.process_event(CLIENT, Data) + assert cs.states == {CLIENT: SEND_BODY, SERVER: SEND_RESPONSE} + + assert switch_type in cs.pending_switch_proposals + + if deny_early: + # before client reaches DONE + cs.process_event(SERVER, Response) + assert not cs.pending_switch_proposals + + cs.process_event(CLIENT, EndOfMessage) + + if deny_early: + assert cs.states == {CLIENT: DONE, SERVER: SEND_BODY} + else: + assert cs.states == { + CLIENT: MIGHT_SWITCH_PROTOCOL, + SERVER: SEND_RESPONSE, + } + + cs.process_event(SERVER, InformationalResponse) + assert cs.states == { + CLIENT: MIGHT_SWITCH_PROTOCOL, + SERVER: SEND_RESPONSE, + } + + cs.process_event(SERVER, Response) + assert cs.states == {CLIENT: DONE, SERVER: SEND_BODY} + assert not cs.pending_switch_proposals + + +_response_type_for_switch = { + _SWITCH_UPGRADE: InformationalResponse, + _SWITCH_CONNECT: Response, + None: Response, +} + + +def test_ConnectionState_protocol_switch_accepted() -> None: + for switch_event in [_SWITCH_UPGRADE, _SWITCH_CONNECT]: + cs = ConnectionState() + cs.process_client_switch_proposal(switch_event) + cs.process_event(CLIENT, Request) + cs.process_event(CLIENT, Data) + assert cs.states == {CLIENT: SEND_BODY, SERVER: SEND_RESPONSE} + + cs.process_event(CLIENT, EndOfMessage) + assert cs.states == {CLIENT: MIGHT_SWITCH_PROTOCOL, SERVER: SEND_RESPONSE} + + cs.process_event(SERVER, InformationalResponse) + assert cs.states == {CLIENT: MIGHT_SWITCH_PROTOCOL, SERVER: SEND_RESPONSE} + + cs.process_event(SERVER, _response_type_for_switch[switch_event], switch_event) + assert cs.states == {CLIENT: SWITCHED_PROTOCOL, SERVER: SWITCHED_PROTOCOL} + + +def test_ConnectionState_double_protocol_switch() -> None: + # CONNECT + Upgrade is legal! Very silly, but legal. So we support + # it. Because sometimes doing the silly thing is easier than not. + for server_switch in [None, _SWITCH_UPGRADE, _SWITCH_CONNECT]: + cs = ConnectionState() + cs.process_client_switch_proposal(_SWITCH_UPGRADE) + cs.process_client_switch_proposal(_SWITCH_CONNECT) + cs.process_event(CLIENT, Request) + cs.process_event(CLIENT, EndOfMessage) + assert cs.states == {CLIENT: MIGHT_SWITCH_PROTOCOL, SERVER: SEND_RESPONSE} + cs.process_event( + SERVER, _response_type_for_switch[server_switch], server_switch + ) + if server_switch is None: + assert cs.states == {CLIENT: DONE, SERVER: SEND_BODY} + else: + assert cs.states == {CLIENT: SWITCHED_PROTOCOL, SERVER: SWITCHED_PROTOCOL} + + +def test_ConnectionState_inconsistent_protocol_switch() -> None: + for client_switches, server_switch in [ + ([], _SWITCH_CONNECT), + ([], _SWITCH_UPGRADE), + ([_SWITCH_UPGRADE], _SWITCH_CONNECT), + ([_SWITCH_CONNECT], _SWITCH_UPGRADE), + ]: + cs = ConnectionState() + for client_switch in client_switches: # type: ignore[attr-defined] + cs.process_client_switch_proposal(client_switch) + cs.process_event(CLIENT, Request) + with pytest.raises(LocalProtocolError): + cs.process_event(SERVER, Response, server_switch) + + +def test_ConnectionState_keepalive_protocol_switch_interaction() -> None: + # keep_alive=False + pending_switch_proposals + cs = ConnectionState() + cs.process_client_switch_proposal(_SWITCH_UPGRADE) + cs.process_event(CLIENT, Request) + cs.process_keep_alive_disabled() + cs.process_event(CLIENT, Data) + assert cs.states == {CLIENT: SEND_BODY, SERVER: SEND_RESPONSE} + + # the protocol switch "wins" + cs.process_event(CLIENT, EndOfMessage) + assert cs.states == {CLIENT: MIGHT_SWITCH_PROTOCOL, SERVER: SEND_RESPONSE} + + # but when the server denies the request, keep_alive comes back into play + cs.process_event(SERVER, Response) + assert cs.states == {CLIENT: MUST_CLOSE, SERVER: SEND_BODY} + + +def test_ConnectionState_reuse() -> None: + cs = ConnectionState() + + with pytest.raises(LocalProtocolError): + cs.start_next_cycle() + + cs.process_event(CLIENT, Request) + cs.process_event(CLIENT, EndOfMessage) + + with pytest.raises(LocalProtocolError): + cs.start_next_cycle() + + cs.process_event(SERVER, Response) + cs.process_event(SERVER, EndOfMessage) + + cs.start_next_cycle() + assert cs.states == {CLIENT: IDLE, SERVER: IDLE} + + # No keepalive + + cs.process_event(CLIENT, Request) + cs.process_keep_alive_disabled() + cs.process_event(CLIENT, EndOfMessage) + cs.process_event(SERVER, Response) + cs.process_event(SERVER, EndOfMessage) + + with pytest.raises(LocalProtocolError): + cs.start_next_cycle() + + # One side closed + + cs = ConnectionState() + cs.process_event(CLIENT, Request) + cs.process_event(CLIENT, EndOfMessage) + cs.process_event(CLIENT, ConnectionClosed) + cs.process_event(SERVER, Response) + cs.process_event(SERVER, EndOfMessage) + + with pytest.raises(LocalProtocolError): + cs.start_next_cycle() + + # Succesful protocol switch + + cs = ConnectionState() + cs.process_client_switch_proposal(_SWITCH_UPGRADE) + cs.process_event(CLIENT, Request) + cs.process_event(CLIENT, EndOfMessage) + cs.process_event(SERVER, InformationalResponse, _SWITCH_UPGRADE) + + with pytest.raises(LocalProtocolError): + cs.start_next_cycle() + + # Failed protocol switch + + cs = ConnectionState() + cs.process_client_switch_proposal(_SWITCH_UPGRADE) + cs.process_event(CLIENT, Request) + cs.process_event(CLIENT, EndOfMessage) + cs.process_event(SERVER, Response) + cs.process_event(SERVER, EndOfMessage) + + cs.start_next_cycle() + assert cs.states == {CLIENT: IDLE, SERVER: IDLE} + + +def test_server_request_is_illegal() -> None: + # There used to be a bug in how we handled the Request special case that + # made this allowed... + cs = ConnectionState() + with pytest.raises(LocalProtocolError): + cs.process_event(SERVER, Request) diff --git a/venv/lib/python3.11/site-packages/h11/tests/test_util.py b/venv/lib/python3.11/site-packages/h11/tests/test_util.py new file mode 100644 index 0000000..79bc095 --- /dev/null +++ b/venv/lib/python3.11/site-packages/h11/tests/test_util.py @@ -0,0 +1,112 @@ +import re +import sys +import traceback +from typing import NoReturn + +import pytest + +from .._util import ( + bytesify, + LocalProtocolError, + ProtocolError, + RemoteProtocolError, + Sentinel, + validate, +) + + +def test_ProtocolError() -> None: + with pytest.raises(TypeError): + ProtocolError("abstract base class") + + +def test_LocalProtocolError() -> None: + try: + raise LocalProtocolError("foo") + except LocalProtocolError as e: + assert str(e) == "foo" + assert e.error_status_hint == 400 + + try: + raise LocalProtocolError("foo", error_status_hint=418) + except LocalProtocolError as e: + assert str(e) == "foo" + assert e.error_status_hint == 418 + + def thunk() -> NoReturn: + raise LocalProtocolError("a", error_status_hint=420) + + try: + try: + thunk() + except LocalProtocolError as exc1: + orig_traceback = "".join(traceback.format_tb(sys.exc_info()[2])) + exc1._reraise_as_remote_protocol_error() + except RemoteProtocolError as exc2: + assert type(exc2) is RemoteProtocolError + assert exc2.args == ("a",) + assert exc2.error_status_hint == 420 + new_traceback = "".join(traceback.format_tb(sys.exc_info()[2])) + assert new_traceback.endswith(orig_traceback) + + +def test_validate() -> None: + my_re = re.compile(rb"(?P<group1>[0-9]+)\.(?P<group2>[0-9]+)") + with pytest.raises(LocalProtocolError): + validate(my_re, b"0.") + + groups = validate(my_re, b"0.1") + assert groups == {"group1": b"0", "group2": b"1"} + + # successful partial matches are an error - must match whole string + with pytest.raises(LocalProtocolError): + validate(my_re, b"0.1xx") + with pytest.raises(LocalProtocolError): + validate(my_re, b"0.1\n") + + +def test_validate_formatting() -> None: + my_re = re.compile(rb"foo") + + with pytest.raises(LocalProtocolError) as excinfo: + validate(my_re, b"", "oops") + assert "oops" in str(excinfo.value) + + with pytest.raises(LocalProtocolError) as excinfo: + validate(my_re, b"", "oops {}") + assert "oops {}" in str(excinfo.value) + + with pytest.raises(LocalProtocolError) as excinfo: + validate(my_re, b"", "oops {} xx", 10) + assert "oops 10 xx" in str(excinfo.value) + + +def test_make_sentinel() -> None: + class S(Sentinel, metaclass=Sentinel): + pass + + assert repr(S) == "S" + assert S == S + assert type(S).__name__ == "S" + assert S in {S} + assert type(S) is S + + class S2(Sentinel, metaclass=Sentinel): + pass + + assert repr(S2) == "S2" + assert S != S2 + assert S not in {S2} + assert type(S) is not type(S2) + + +def test_bytesify() -> None: + assert bytesify(b"123") == b"123" + assert bytesify(bytearray(b"123")) == b"123" + assert bytesify("123") == b"123" + + with pytest.raises(UnicodeEncodeError): + bytesify("\u1234") + + with pytest.raises(TypeError): + bytesify(10) |