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