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"""HTTP related errors."""
import asyncio
try:
import ssl
except ImportError: # pragma: no cover
ssl = None
__all__ = (
'ClientError',
'ClientConnectionError',
'ClientOSError', 'ClientConnectorError', 'ClientProxyConnectionError',
'ClientSSLError',
'ClientConnectorSSLError', 'ClientConnectorCertificateError',
'ServerConnectionError', 'ServerTimeoutError', 'ServerDisconnectedError',
'ServerFingerprintMismatch',
'ClientResponseError', 'ClientHttpProxyError',
'WSServerHandshakeError', 'ContentTypeError',
'ClientPayloadError', 'InvalidURL')
class ClientError(Exception):
"""Base class for client connection errors."""
class ClientResponseError(ClientError):
"""Connection error during reading response.
request_info: instance of RequestInfo
"""
def __init__(self, request_info, history, *,
code=0, message='', headers=None):
self.request_info = request_info
self.code = code
self.message = message
self.headers = headers
self.history = history
super().__init__("%s, message='%s'" % (code, message))
class ContentTypeError(ClientResponseError):
"""ContentType found is not valid."""
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.
"""
class ClientConnectionError(ClientError):
"""Base class for client socket errors."""
class ClientOSError(ClientConnectionError, OSError):
"""OSError error."""
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, os_error):
self._conn_key = connection_key
self._os_error = os_error
super().__init__(os_error.errno, os_error.strerror)
@property
def os_error(self):
return self._os_error
@property
def host(self):
return self._conn_key.host
@property
def port(self):
return self._conn_key.port
@property
def ssl(self):
return self._conn_key.ssl
def __str__(self):
return ('Cannot connect to host {0.host}:{0.port} ssl:{0.ssl} [{1}]'
.format(self, self.strerror))
class ClientProxyConnectionError(ClientConnectorError):
"""Proxy connection error.
Raised in :class:`aiohttp.connector.TCPConnector` if
connection to proxy can not be established.
"""
class ServerConnectionError(ClientConnectionError):
"""Server connection errors."""
class ServerDisconnectedError(ServerConnectionError):
"""Server disconnected."""
def __init__(self, message=None):
self.message = message
class ServerTimeoutError(ServerConnectionError, asyncio.TimeoutError):
"""Server timeout error."""
class ServerFingerprintMismatch(ServerConnectionError):
"""SSL certificate does not match expected fingerprint."""
def __init__(self, expected, got, host, port):
self.expected = expected
self.got = got
self.host = host
self.port = port
def __repr__(self):
return '<{} expected={} got={} host={} port={}>'.format(
self.__class__.__name__, self.expected, self.got,
self.host, self.port)
class ClientPayloadError(ClientError):
"""Response payload error."""
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):
super().__init__(url)
@property
def url(self):
return self.args[0]
def __repr__(self):
return '<{} {}>'.format(self.__class__.__name__, self.url)
class ClientSSLError(ClientConnectorError):
"""Base error for ssl.*Errors."""
if ssl is not None:
certificate_errors = (ssl.CertificateError,)
certificate_errors_bases = (ClientSSLError, ssl.CertificateError,)
ssl_errors = (ssl.SSLError,)
ssl_error_bases = (ClientSSLError, ssl.SSLError)
else: # pragma: no cover
certificate_errors = tuple()
certificate_errors_bases = (ClientSSLError, ValueError,)
ssl_errors = tuple()
ssl_error_bases = (ClientSSLError,)
class ClientConnectorSSLError(*ssl_error_bases):
"""Response ssl error."""
class ClientConnectorCertificateError(*certificate_errors_bases):
"""Response certificate error."""
def __init__(self, connection_key, certificate_error):
self._conn_key = connection_key
self._certificate_error = certificate_error
@property
def certificate_error(self):
return self._certificate_error
@property
def host(self):
return self._conn_key.host
@property
def port(self):
return self._conn_key.port
@property
def ssl(self):
return self._conn_key.ssl
def __str__(self):
return ('Cannot connect to host {0.host}:{0.port} ssl:{0.ssl} '
'[{0.certificate_error.__class__.__name__}: '
'{0.certificate_error.args}]'.format(self))
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