diff options
Diffstat (limited to 'venv/lib/python3.11/site-packages/httpx/_config.py')
| -rw-r--r-- | venv/lib/python3.11/site-packages/httpx/_config.py | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/venv/lib/python3.11/site-packages/httpx/_config.py b/venv/lib/python3.11/site-packages/httpx/_config.py new file mode 100644 index 0000000..7636a5d --- /dev/null +++ b/venv/lib/python3.11/site-packages/httpx/_config.py @@ -0,0 +1,370 @@ +from __future__ import annotations + +import logging +import os +import ssl +import typing +from pathlib import Path + +import certifi + +from ._compat import set_minimum_tls_version_1_2 +from ._models import Headers +from ._types import CertTypes, HeaderTypes, TimeoutTypes, URLTypes, VerifyTypes +from ._urls import URL +from ._utils import get_ca_bundle_from_env + +DEFAULT_CIPHERS = ":".join( + [ + "ECDHE+AESGCM", + "ECDHE+CHACHA20", + "DHE+AESGCM", + "DHE+CHACHA20", + "ECDH+AESGCM", + "DH+AESGCM", + "ECDH+AES", + "DH+AES", + "RSA+AESGCM", + "RSA+AES", + "!aNULL", + "!eNULL", + "!MD5", + "!DSS", + ] +) + + +logger = logging.getLogger("httpx") + + +class UnsetType: + pass # pragma: no cover + + +UNSET = UnsetType() + + +def create_ssl_context( + cert: CertTypes | None = None, + verify: VerifyTypes = True, + trust_env: bool = True, + http2: bool = False, +) -> ssl.SSLContext: + return SSLConfig( + cert=cert, verify=verify, trust_env=trust_env, http2=http2 + ).ssl_context + + +class SSLConfig: + """ + SSL Configuration. + """ + + DEFAULT_CA_BUNDLE_PATH = Path(certifi.where()) + + def __init__( + self, + *, + cert: CertTypes | None = None, + verify: VerifyTypes = True, + trust_env: bool = True, + http2: bool = False, + ) -> None: + self.cert = cert + self.verify = verify + self.trust_env = trust_env + self.http2 = http2 + self.ssl_context = self.load_ssl_context() + + def load_ssl_context(self) -> ssl.SSLContext: + logger.debug( + "load_ssl_context verify=%r cert=%r trust_env=%r http2=%r", + self.verify, + self.cert, + self.trust_env, + self.http2, + ) + + if self.verify: + return self.load_ssl_context_verify() + return self.load_ssl_context_no_verify() + + def load_ssl_context_no_verify(self) -> ssl.SSLContext: + """ + Return an SSL context for unverified connections. + """ + context = self._create_default_ssl_context() + context.check_hostname = False + context.verify_mode = ssl.CERT_NONE + self._load_client_certs(context) + return context + + def load_ssl_context_verify(self) -> ssl.SSLContext: + """ + Return an SSL context for verified connections. + """ + if self.trust_env and self.verify is True: + ca_bundle = get_ca_bundle_from_env() + if ca_bundle is not None: + self.verify = ca_bundle + + if isinstance(self.verify, ssl.SSLContext): + # Allow passing in our own SSLContext object that's pre-configured. + context = self.verify + self._load_client_certs(context) + return context + elif isinstance(self.verify, bool): + ca_bundle_path = self.DEFAULT_CA_BUNDLE_PATH + elif Path(self.verify).exists(): + ca_bundle_path = Path(self.verify) + else: + raise IOError( + "Could not find a suitable TLS CA certificate bundle, " + "invalid path: {}".format(self.verify) + ) + + context = self._create_default_ssl_context() + context.verify_mode = ssl.CERT_REQUIRED + context.check_hostname = True + + # Signal to server support for PHA in TLS 1.3. Raises an + # AttributeError if only read-only access is implemented. + try: + context.post_handshake_auth = True + except AttributeError: # pragma: no cover + pass + + # Disable using 'commonName' for SSLContext.check_hostname + # when the 'subjectAltName' extension isn't available. + try: + context.hostname_checks_common_name = False + except AttributeError: # pragma: no cover + pass + + if ca_bundle_path.is_file(): + cafile = str(ca_bundle_path) + logger.debug("load_verify_locations cafile=%r", cafile) + context.load_verify_locations(cafile=cafile) + elif ca_bundle_path.is_dir(): + capath = str(ca_bundle_path) + logger.debug("load_verify_locations capath=%r", capath) + context.load_verify_locations(capath=capath) + + self._load_client_certs(context) + + return context + + def _create_default_ssl_context(self) -> ssl.SSLContext: + """ + Creates the default SSLContext object that's used for both verified + and unverified connections. + """ + context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT) + set_minimum_tls_version_1_2(context) + context.options |= ssl.OP_NO_COMPRESSION + context.set_ciphers(DEFAULT_CIPHERS) + + if ssl.HAS_ALPN: + alpn_idents = ["http/1.1", "h2"] if self.http2 else ["http/1.1"] + context.set_alpn_protocols(alpn_idents) + + keylogfile = os.environ.get("SSLKEYLOGFILE") + if keylogfile and self.trust_env: + context.keylog_filename = keylogfile + + return context + + def _load_client_certs(self, ssl_context: ssl.SSLContext) -> None: + """ + Loads client certificates into our SSLContext object + """ + if self.cert is not None: + if isinstance(self.cert, str): + ssl_context.load_cert_chain(certfile=self.cert) + elif isinstance(self.cert, tuple) and len(self.cert) == 2: + ssl_context.load_cert_chain(certfile=self.cert[0], keyfile=self.cert[1]) + elif isinstance(self.cert, tuple) and len(self.cert) == 3: + ssl_context.load_cert_chain( + certfile=self.cert[0], + keyfile=self.cert[1], + password=self.cert[2], + ) + + +class Timeout: + """ + Timeout configuration. + + **Usage**: + + Timeout(None) # No timeouts. + Timeout(5.0) # 5s timeout on all operations. + Timeout(None, connect=5.0) # 5s timeout on connect, no other timeouts. + Timeout(5.0, connect=10.0) # 10s timeout on connect. 5s timeout elsewhere. + Timeout(5.0, pool=None) # No timeout on acquiring connection from pool. + # 5s timeout elsewhere. + """ + + def __init__( + self, + timeout: TimeoutTypes | UnsetType = UNSET, + *, + connect: None | float | UnsetType = UNSET, + read: None | float | UnsetType = UNSET, + write: None | float | UnsetType = UNSET, + pool: None | float | UnsetType = UNSET, + ) -> None: + if isinstance(timeout, Timeout): + # Passed as a single explicit Timeout. + assert connect is UNSET + assert read is UNSET + assert write is UNSET + assert pool is UNSET + self.connect = timeout.connect # type: typing.Optional[float] + self.read = timeout.read # type: typing.Optional[float] + self.write = timeout.write # type: typing.Optional[float] + self.pool = timeout.pool # type: typing.Optional[float] + elif isinstance(timeout, tuple): + # Passed as a tuple. + self.connect = timeout[0] + self.read = timeout[1] + self.write = None if len(timeout) < 3 else timeout[2] + self.pool = None if len(timeout) < 4 else timeout[3] + elif not ( + isinstance(connect, UnsetType) + or isinstance(read, UnsetType) + or isinstance(write, UnsetType) + or isinstance(pool, UnsetType) + ): + self.connect = connect + self.read = read + self.write = write + self.pool = pool + else: + if isinstance(timeout, UnsetType): + raise ValueError( + "httpx.Timeout must either include a default, or set all " + "four parameters explicitly." + ) + self.connect = timeout if isinstance(connect, UnsetType) else connect + self.read = timeout if isinstance(read, UnsetType) else read + self.write = timeout if isinstance(write, UnsetType) else write + self.pool = timeout if isinstance(pool, UnsetType) else pool + + def as_dict(self) -> dict[str, float | None]: + return { + "connect": self.connect, + "read": self.read, + "write": self.write, + "pool": self.pool, + } + + def __eq__(self, other: typing.Any) -> bool: + return ( + isinstance(other, self.__class__) + and self.connect == other.connect + and self.read == other.read + and self.write == other.write + and self.pool == other.pool + ) + + def __repr__(self) -> str: + class_name = self.__class__.__name__ + if len({self.connect, self.read, self.write, self.pool}) == 1: + return f"{class_name}(timeout={self.connect})" + return ( + f"{class_name}(connect={self.connect}, " + f"read={self.read}, write={self.write}, pool={self.pool})" + ) + + +class Limits: + """ + Configuration for limits to various client behaviors. + + **Parameters:** + + * **max_connections** - The maximum number of concurrent connections that may be + established. + * **max_keepalive_connections** - Allow the connection pool to maintain + keep-alive connections below this point. Should be less than or equal + to `max_connections`. + * **keepalive_expiry** - Time limit on idle keep-alive connections in seconds. + """ + + def __init__( + self, + *, + max_connections: int | None = None, + max_keepalive_connections: int | None = None, + keepalive_expiry: float | None = 5.0, + ) -> None: + self.max_connections = max_connections + self.max_keepalive_connections = max_keepalive_connections + self.keepalive_expiry = keepalive_expiry + + def __eq__(self, other: typing.Any) -> bool: + return ( + isinstance(other, self.__class__) + and self.max_connections == other.max_connections + and self.max_keepalive_connections == other.max_keepalive_connections + and self.keepalive_expiry == other.keepalive_expiry + ) + + def __repr__(self) -> str: + class_name = self.__class__.__name__ + return ( + f"{class_name}(max_connections={self.max_connections}, " + f"max_keepalive_connections={self.max_keepalive_connections}, " + f"keepalive_expiry={self.keepalive_expiry})" + ) + + +class Proxy: + def __init__( + self, + url: URLTypes, + *, + ssl_context: ssl.SSLContext | None = None, + auth: tuple[str, str] | None = None, + headers: HeaderTypes | None = None, + ) -> None: + url = URL(url) + headers = Headers(headers) + + if url.scheme not in ("http", "https", "socks5"): + raise ValueError(f"Unknown scheme for proxy URL {url!r}") + + if url.username or url.password: + # Remove any auth credentials from the URL. + auth = (url.username, url.password) + url = url.copy_with(username=None, password=None) + + self.url = url + self.auth = auth + self.headers = headers + self.ssl_context = ssl_context + + @property + def raw_auth(self) -> tuple[bytes, bytes] | None: + # The proxy authentication as raw bytes. + return ( + None + if self.auth is None + else (self.auth[0].encode("utf-8"), self.auth[1].encode("utf-8")) + ) + + def __repr__(self) -> str: + # The authentication is represented with the password component masked. + auth = (self.auth[0], "********") if self.auth else None + + # Build a nice concise representation. + url_str = f"{str(self.url)!r}" + auth_str = f", auth={auth!r}" if auth else "" + headers_str = f", headers={dict(self.headers)!r}" if self.headers else "" + return f"Proxy({url_str}{auth_str}{headers_str})" + + +DEFAULT_TIMEOUT_CONFIG = Timeout(timeout=5.0) +DEFAULT_LIMITS = Limits(max_connections=100, max_keepalive_connections=20) +DEFAULT_MAX_REDIRECTS = 20 |