Application: gvSIG desktop » gvSIG scripting

from __future__ import absolute_import

# Base Exceptions

class HTTPError(Exception):

    "Base exception used by this module."

    pass

class HTTPWarning(Warning):

    "Base warning used by this module."

    pass

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."

    pass

class ProxyError(HTTPError):

    "Raised when the connection to a proxy fails."

    pass

class DecodeError(HTTPError):

    "Raised when automatic decoding based on Content-Type fails."

    pass

class ProtocolError(HTTPError):

    "Raised when something unexpected happens mid-request/response."

    pass

#: 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 """

    pass

class TimeoutError(HTTPError):

    """ Raised when a socket timeout error occurs.

    Catching this error will catch both :exc:`ReadTimeoutErrors

    <ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`.

    """

    pass

class ReadTimeoutError(TimeoutError, RequestError):

    "Raised when a socket timeout occurs while receiving data from a server"

    pass

# 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"

    pass

class NewConnectionError(ConnectTimeoutError, PoolError):

    "Raised when we fail to establish a new connection. Usually ECONNREFUSED."

    pass

class EmptyPoolError(PoolError):

    "Raised when a pool runs out of connections and no more are allowed."

    pass

class ClosedPoolError(PoolError):

    "Raised when a request enters a pool after the pool has been closed."

    pass

class LocationValueError(ValueError, HTTPError):

    "Raised when there is something wrong with a given URL input."

    pass

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"

    pass

class SubjectAltNameWarning(SecurityWarning):

    "Warned when connecting to a host with a certificate missing a SAN."

    pass

class InsecureRequestWarning(SecurityWarning):

    "Warned when making an unverified HTTPS request."

    pass

class SystemTimeWarning(SecurityWarning):

    "Warned when system time is suspected to be wrong"

    pass

class InsecurePlatformWarning(SecurityWarning):

    "Warned when certain SSL configuration is not available on a platform."

    pass

class SNIMissingWarning(HTTPWarning):

    "Warned when making a HTTPS request without SNI available."

    pass

class ResponseNotChunked(ProtocolError, ValueError):

    "Response needs to be chunked in order to read it as chunks."

    pass

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)