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from __future__ import absolute_import
from .packages.six.moves.http_client import (
IncompleteRead as httplib_IncompleteRead
# Base Exceptions
class HTTPError(Exception):
"Base exception used by this module."
class HTTPWarning(Warning):
"Base warning used by this module."
class PoolError(HTTPError):
"Base exception for errors caused within a pool."
def __init__(self, pool, message):
self.pool = pool
HTTPError.__init__(self, "%s: %s" % (pool, message))
def __reduce__(self):
# For pickling purposes.
return self.__class__, (None, None)
class RequestError(PoolError):
"Base exception for PoolErrors that have associated URLs."
def __init__(self, pool, url, message):
self.url = url
PoolError.__init__(self, pool, message)
def __reduce__(self):
# For pickling purposes.
return self.__class__, (None, self.url, None)
class SSLError(HTTPError):
"Raised when SSL certificate fails in an HTTPS connection."
class ProxyError(HTTPError):
"Raised when the connection to a proxy fails."
class DecodeError(HTTPError):
"Raised when automatic decoding based on Content-Type fails."
class ProtocolError(HTTPError):
"Raised when something unexpected happens mid-request/response."
#: Renamed to ProtocolError but aliased for backwards compatibility.
ConnectionError = ProtocolError
# Leaf Exceptions
class MaxRetryError(RequestError):
"""Raised when the maximum number of retries is exceeded.
:param pool: The connection pool
:type pool: :class:`~urllib3.connectionpool.HTTPConnectionPool`
:param string url: The requested Url
:param exceptions.Exception reason: The underlying error
def __init__(self, pool, url, reason=None):
self.reason = reason
message = "Max retries exceeded with url: %s (Caused by %r)" % (
url, reason)
RequestError.__init__(self, pool, url, message)
class HostChangedError(RequestError):
"Raised when an existing pool gets a request for a foreign host."
def __init__(self, pool, url, retries=3):
message = "Tried to open a foreign host with url: %s" % url
RequestError.__init__(self, pool, url, message)
self.retries = retries
class TimeoutStateError(HTTPError):
""" Raised when passing an invalid state to a timeout """
class TimeoutError(HTTPError):
""" Raised when a socket timeout error occurs.
Catching this error will catch both :exc:`ReadTimeoutErrors
<ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`.
class ReadTimeoutError(TimeoutError, RequestError):
"Raised when a socket timeout occurs while receiving data from a server"
# This timeout error does not have a URL attached and needs to inherit from the
# base HTTPError
class ConnectTimeoutError(TimeoutError):
"Raised when a socket timeout occurs while connecting to a server"
class NewConnectionError(ConnectTimeoutError, PoolError):
"Raised when we fail to establish a new connection. Usually ECONNREFUSED."
class EmptyPoolError(PoolError):
"Raised when a pool runs out of connections and no more are allowed."
class ClosedPoolError(PoolError):
"Raised when a request enters a pool after the pool has been closed."
class LocationValueError(ValueError, HTTPError):
"Raised when there is something wrong with a given URL input."
class LocationParseError(LocationValueError):
"Raised when get_host or similar fails to parse the URL input."
def __init__(self, location):
message = "Failed to parse: %s" % location
HTTPError.__init__(self, message)
self.location = location
class ResponseError(HTTPError):
"Used as a container for an error reason supplied in a MaxRetryError."
GENERIC_ERROR = 'too many error responses'
SPECIFIC_ERROR = 'too many {status_code} error responses'
class SecurityWarning(HTTPWarning):
"Warned when perfoming security reducing actions"
class SubjectAltNameWarning(SecurityWarning):
"Warned when connecting to a host with a certificate missing a SAN."
class InsecureRequestWarning(SecurityWarning):
"Warned when making an unverified HTTPS request."
class SystemTimeWarning(SecurityWarning):
"Warned when system time is suspected to be wrong"
class InsecurePlatformWarning(SecurityWarning):
"Warned when certain SSL configuration is not available on a platform."
class SNIMissingWarning(HTTPWarning):
"Warned when making a HTTPS request without SNI available."
class DependencyWarning(HTTPWarning):
Warned when an attempt is made to import a module with missing optional
class ResponseNotChunked(ProtocolError, ValueError):
"Response needs to be chunked in order to read it as chunks."
class BodyNotHttplibCompatible(HTTPError):
Body should be httplib.HTTPResponse like (have an fp attribute which
returns raw chunks) for read_chunked().
class IncompleteRead(HTTPError, httplib_IncompleteRead):
Response length doesn't match expected Content-Length
Subclass of http_client.IncompleteRead to allow int value
for `partial` to avoid creating large objects on streamed
def __init__(self, partial, expected):
super(IncompleteRead, self).__init__(partial, expected)
def __repr__(self):
return ('IncompleteRead(%i bytes read, '
'%i more expected)' % (self.partial, self.expected))
class InvalidHeader(HTTPError):
"The header provided was somehow invalid."
class ProxySchemeUnknown(AssertionError, ValueError):
"ProxyManager does not support the supplied scheme"
# TODO(t-8ch): Stop inheriting from AssertionError in v2.0.
def __init__(self, scheme):
message = "Not supported proxy scheme %s" % scheme
super(ProxySchemeUnknown, self).__init__(message)
class HeaderParsingError(HTTPError):
"Raised by assert_header_parsing, but we convert it to a log.warning statement."
def __init__(self, defects, unparsed_data):
message = '%s, unparsed data: %r' % (defects or 'Unknown', unparsed_data)
super(HeaderParsingError, self).__init__(message)
class UnrewindableBodyError(HTTPError):
"urllib3 encountered an error when trying to rewind a body"