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323 lines
8 KiB
Python
323 lines
8 KiB
Python
from __future__ import absolute_import
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from .packages.six.moves.http_client import IncompleteRead as httplib_IncompleteRead
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# Base Exceptions
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class HTTPError(Exception):
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"""Base exception used by this module."""
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pass
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class HTTPWarning(Warning):
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"""Base warning used by this module."""
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pass
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class PoolError(HTTPError):
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"""Base exception for errors caused within a pool."""
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def __init__(self, pool, message):
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self.pool = pool
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HTTPError.__init__(self, "%s: %s" % (pool, message))
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def __reduce__(self):
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# For pickling purposes.
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return self.__class__, (None, None)
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class RequestError(PoolError):
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"""Base exception for PoolErrors that have associated URLs."""
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def __init__(self, pool, url, message):
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self.url = url
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PoolError.__init__(self, pool, message)
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def __reduce__(self):
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# For pickling purposes.
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return self.__class__, (None, self.url, None)
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class SSLError(HTTPError):
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"""Raised when SSL certificate fails in an HTTPS connection."""
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pass
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class ProxyError(HTTPError):
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"""Raised when the connection to a proxy fails."""
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def __init__(self, message, error, *args):
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super(ProxyError, self).__init__(message, error, *args)
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self.original_error = error
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class DecodeError(HTTPError):
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"""Raised when automatic decoding based on Content-Type fails."""
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pass
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class ProtocolError(HTTPError):
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"""Raised when something unexpected happens mid-request/response."""
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pass
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#: Renamed to ProtocolError but aliased for backwards compatibility.
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ConnectionError = ProtocolError
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# Leaf Exceptions
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class MaxRetryError(RequestError):
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"""Raised when the maximum number of retries is exceeded.
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:param pool: The connection pool
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:type pool: :class:`~urllib3.connectionpool.HTTPConnectionPool`
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:param string url: The requested Url
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:param exceptions.Exception reason: The underlying error
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"""
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def __init__(self, pool, url, reason=None):
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self.reason = reason
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message = "Max retries exceeded with url: %s (Caused by %r)" % (url, reason)
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RequestError.__init__(self, pool, url, message)
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class HostChangedError(RequestError):
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"""Raised when an existing pool gets a request for a foreign host."""
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def __init__(self, pool, url, retries=3):
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message = "Tried to open a foreign host with url: %s" % url
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RequestError.__init__(self, pool, url, message)
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self.retries = retries
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class TimeoutStateError(HTTPError):
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"""Raised when passing an invalid state to a timeout"""
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pass
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class TimeoutError(HTTPError):
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"""Raised when a socket timeout error occurs.
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Catching this error will catch both :exc:`ReadTimeoutErrors
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<ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`.
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"""
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pass
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class ReadTimeoutError(TimeoutError, RequestError):
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"""Raised when a socket timeout occurs while receiving data from a server"""
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pass
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# This timeout error does not have a URL attached and needs to inherit from the
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# base HTTPError
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class ConnectTimeoutError(TimeoutError):
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"""Raised when a socket timeout occurs while connecting to a server"""
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pass
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class NewConnectionError(ConnectTimeoutError, PoolError):
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"""Raised when we fail to establish a new connection. Usually ECONNREFUSED."""
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pass
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class EmptyPoolError(PoolError):
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"""Raised when a pool runs out of connections and no more are allowed."""
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pass
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class ClosedPoolError(PoolError):
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"""Raised when a request enters a pool after the pool has been closed."""
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pass
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class LocationValueError(ValueError, HTTPError):
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"""Raised when there is something wrong with a given URL input."""
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pass
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class LocationParseError(LocationValueError):
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"""Raised when get_host or similar fails to parse the URL input."""
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def __init__(self, location):
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message = "Failed to parse: %s" % location
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HTTPError.__init__(self, message)
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self.location = location
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class URLSchemeUnknown(LocationValueError):
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"""Raised when a URL input has an unsupported scheme."""
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def __init__(self, scheme):
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message = "Not supported URL scheme %s" % scheme
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super(URLSchemeUnknown, self).__init__(message)
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self.scheme = scheme
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class ResponseError(HTTPError):
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"""Used as a container for an error reason supplied in a MaxRetryError."""
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GENERIC_ERROR = "too many error responses"
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SPECIFIC_ERROR = "too many {status_code} error responses"
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class SecurityWarning(HTTPWarning):
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"""Warned when performing security reducing actions"""
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pass
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class SubjectAltNameWarning(SecurityWarning):
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"""Warned when connecting to a host with a certificate missing a SAN."""
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pass
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class InsecureRequestWarning(SecurityWarning):
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"""Warned when making an unverified HTTPS request."""
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pass
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class SystemTimeWarning(SecurityWarning):
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"""Warned when system time is suspected to be wrong"""
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pass
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class InsecurePlatformWarning(SecurityWarning):
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"""Warned when certain TLS/SSL configuration is not available on a platform."""
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pass
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class SNIMissingWarning(HTTPWarning):
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"""Warned when making a HTTPS request without SNI available."""
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pass
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class DependencyWarning(HTTPWarning):
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"""
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Warned when an attempt is made to import a module with missing optional
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dependencies.
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"""
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pass
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class ResponseNotChunked(ProtocolError, ValueError):
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"""Response needs to be chunked in order to read it as chunks."""
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pass
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class BodyNotHttplibCompatible(HTTPError):
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"""
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Body should be :class:`http.client.HTTPResponse` like
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(have an fp attribute which returns raw chunks) for read_chunked().
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"""
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pass
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class IncompleteRead(HTTPError, httplib_IncompleteRead):
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"""
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Response length doesn't match expected Content-Length
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Subclass of :class:`http.client.IncompleteRead` to allow int value
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for ``partial`` to avoid creating large objects on streamed reads.
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"""
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def __init__(self, partial, expected):
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super(IncompleteRead, self).__init__(partial, expected)
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def __repr__(self):
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return "IncompleteRead(%i bytes read, %i more expected)" % (
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self.partial,
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self.expected,
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)
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class InvalidChunkLength(HTTPError, httplib_IncompleteRead):
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"""Invalid chunk length in a chunked response."""
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def __init__(self, response, length):
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super(InvalidChunkLength, self).__init__(
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response.tell(), response.length_remaining
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)
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self.response = response
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self.length = length
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def __repr__(self):
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return "InvalidChunkLength(got length %r, %i bytes read)" % (
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self.length,
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self.partial,
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)
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class InvalidHeader(HTTPError):
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"""The header provided was somehow invalid."""
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pass
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class ProxySchemeUnknown(AssertionError, URLSchemeUnknown):
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"""ProxyManager does not support the supplied scheme"""
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# TODO(t-8ch): Stop inheriting from AssertionError in v2.0.
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def __init__(self, scheme):
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# 'localhost' is here because our URL parser parses
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# localhost:8080 -> scheme=localhost, remove if we fix this.
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if scheme == "localhost":
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scheme = None
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if scheme is None:
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message = "Proxy URL had no scheme, should start with http:// or https://"
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else:
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message = (
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"Proxy URL had unsupported scheme %s, should use http:// or https://"
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% scheme
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)
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super(ProxySchemeUnknown, self).__init__(message)
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class ProxySchemeUnsupported(ValueError):
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"""Fetching HTTPS resources through HTTPS proxies is unsupported"""
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pass
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class HeaderParsingError(HTTPError):
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"""Raised by assert_header_parsing, but we convert it to a log.warning statement."""
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def __init__(self, defects, unparsed_data):
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message = "%s, unparsed data: %r" % (defects or "Unknown", unparsed_data)
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super(HeaderParsingError, self).__init__(message)
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class UnrewindableBodyError(HTTPError):
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"""urllib3 encountered an error when trying to rewind a body"""
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pass
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