Source code for aiohttp.client_exceptions

"""HTTP related errors."""

import asyncio
from typing import TYPE_CHECKING, Any, Optional, Tuple, Union

from .http_parser import RawResponseMessage
from .typedefs import LooseHeaders

try:
    import ssl

    SSLContext = ssl.SSLContext
except ImportError:  # pragma: no cover
    ssl = SSLContext = None  # type: ignore[assignment]


if TYPE_CHECKING:  # pragma: no cover
    from .client_reqrep import ClientResponse, ConnectionKey, Fingerprint, RequestInfo
else:
    RequestInfo = ClientResponse = ConnectionKey = None

__all__ = (
    "ClientError",
    "ClientConnectionError",
    "ClientOSError",
    "ClientConnectorError",
    "ClientProxyConnectionError",
    "ClientSSLError",
    "ClientConnectorSSLError",
    "ClientConnectorCertificateError",
    "ServerConnectionError",
    "ServerTimeoutError",
    "ServerDisconnectedError",
    "ServerFingerprintMismatch",
    "ClientResponseError",
    "ClientHttpProxyError",
    "WSServerHandshakeError",
    "ContentTypeError",
    "ClientPayloadError",
    "InvalidURL",
)


[docs]class ClientError(Exception): """Base class for client connection errors."""
[docs]class ClientResponseError(ClientError): """Connection error during reading response. request_info: instance of RequestInfo """ def __init__( self, request_info: RequestInfo, history: Tuple[ClientResponse, ...], *, status: Optional[int] = None, message: str = "", headers: Optional[LooseHeaders] = None, ) -> None: self.request_info = request_info if status is not None: self.status = status else: self.status = 0 self.message = message self.headers = headers self.history = history self.args = (request_info, history) def __str__(self) -> str: return "{}, message={!r}, url={!r}".format( self.status, self.message, self.request_info.real_url, ) def __repr__(self) -> str: args = f"{self.request_info!r}, {self.history!r}" if self.status != 0: args += f", status={self.status!r}" if self.message != "": args += f", message={self.message!r}" if self.headers is not None: args += f", headers={self.headers!r}" return f"{type(self).__name__}({args})"
[docs]class ContentTypeError(ClientResponseError): """ContentType found is not valid."""
[docs]class WSServerHandshakeError(ClientResponseError): """websocket server handshake error."""
class ClientHttpProxyError(ClientResponseError): """HTTP proxy error. Raised in :class:`aiohttp.connector.TCPConnector` if proxy responds with status other than ``200 OK`` on ``CONNECT`` request. """
[docs]class TooManyRedirects(ClientResponseError): """Client was redirected too many times."""
[docs]class ClientConnectionError(ClientError): """Base class for client socket errors."""
[docs]class ClientOSError(ClientConnectionError, OSError): """OSError error."""
[docs]class ClientConnectorError(ClientOSError): """Client connector error. Raised in :class:`aiohttp.connector.TCPConnector` if connection to proxy can not be established. """ def __init__(self, connection_key: ConnectionKey, os_error: OSError) -> None: self._conn_key = connection_key self._os_error = os_error super().__init__(os_error.errno, os_error.strerror) self.args = (connection_key, os_error) @property def os_error(self) -> OSError: return self._os_error @property def host(self) -> str: return self._conn_key.host @property def port(self) -> Optional[int]: return self._conn_key.port @property def ssl(self) -> Union[SSLContext, None, bool, "Fingerprint"]: return self._conn_key.ssl def __str__(self) -> str: return "Cannot connect to host {0.host}:{0.port} ssl:{1} [{2}]".format( self, self.ssl if self.ssl is not None else "default", self.strerror ) # OSError.__reduce__ does too much black magick __reduce__ = BaseException.__reduce__
[docs]class ClientProxyConnectionError(ClientConnectorError): """Proxy connection error. Raised in :class:`aiohttp.connector.TCPConnector` if connection to proxy can not be established. """
class UnixClientConnectorError(ClientConnectorError): """Unix connector error. Raised in :py:class:`aiohttp.connector.UnixConnector` if connection to unix socket can not be established. """ def __init__( self, path: str, connection_key: ConnectionKey, os_error: OSError ) -> None: self._path = path super().__init__(connection_key, os_error) @property def path(self) -> str: return self._path def __str__(self) -> str: return "Cannot connect to unix socket {0.path} ssl:{1} [{2}]".format( self, self.ssl if self.ssl is not None else "default", self.strerror )
[docs]class ServerConnectionError(ClientConnectionError): """Server connection errors."""
[docs]class ServerDisconnectedError(ServerConnectionError): """Server disconnected.""" def __init__(self, message: Union[RawResponseMessage, str, None] = None) -> None: if message is None: message = "Server disconnected" self.args = (message,) self.message = message
[docs]class ServerTimeoutError(ServerConnectionError, asyncio.TimeoutError): """Server timeout error."""
[docs]class ServerFingerprintMismatch(ServerConnectionError): """SSL certificate does not match expected fingerprint.""" def __init__(self, expected: bytes, got: bytes, host: str, port: int) -> None: self.expected = expected self.got = got self.host = host self.port = port self.args = (expected, got, host, port) def __repr__(self) -> str: return "<{} expected={!r} got={!r} host={!r} port={!r}>".format( self.__class__.__name__, self.expected, self.got, self.host, self.port )
[docs]class ClientPayloadError(ClientError): """Response payload error."""
[docs]class InvalidURL(ClientError, ValueError): """Invalid URL. URL used for fetching is malformed, e.g. it doesn't contains host part. """ # Derive from ValueError for backward compatibility def __init__(self, url: Any) -> None: # The type of url is not yarl.URL because the exception can be raised # on URL(url) call super().__init__(url) @property def url(self) -> Any: return self.args[0] def __repr__(self) -> str: return f"<{self.__class__.__name__} {self.url}>"
[docs]class ClientSSLError(ClientConnectorError): """Base error for ssl.*Errors."""
if ssl is not None: cert_errors = (ssl.CertificateError,) cert_errors_bases = ( ClientSSLError, ssl.CertificateError, ) ssl_errors = (ssl.SSLError,) ssl_error_bases = (ClientSSLError, ssl.SSLError) else: # pragma: no cover cert_errors = tuple() cert_errors_bases = ( ClientSSLError, ValueError, ) ssl_errors = tuple() ssl_error_bases = (ClientSSLError,)
[docs]class ClientConnectorSSLError(*ssl_error_bases): # type: ignore[misc] """Response ssl error."""
[docs]class ClientConnectorCertificateError(*cert_errors_bases): # type: ignore[misc] """Response certificate error.""" def __init__( self, connection_key: ConnectionKey, certificate_error: Exception ) -> None: self._conn_key = connection_key self._certificate_error = certificate_error self.args = (connection_key, certificate_error) @property def certificate_error(self) -> Exception: return self._certificate_error @property def host(self) -> str: return self._conn_key.host @property def port(self) -> Optional[int]: return self._conn_key.port @property def ssl(self) -> bool: return self._conn_key.is_ssl def __str__(self) -> str: return ( "Cannot connect to host {0.host}:{0.port} ssl:{0.ssl} " "[{0.certificate_error.__class__.__name__}: " "{0.certificate_error.args}]".format(self) )