# urllib3/exceptions.py
# Copyright 2008-2013 Andrey Petrov and contributors (see CONTRIBUTORS.txt)
#
# This module is part of urllib3 and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php


## Base Exceptions

class HTTPError(Exception):
"Base exception 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


## Leaf Exceptions

class MaxRetryError(RequestError):
"Raised when the maximum number of retries is exceeded."

def __init__(self, pool, url, reason=None):
self.reason = reason

message = "Max retries exceeded with url: %s" % url
if reason:
message += " (Caused by %s: %s)" % (type(reason), reason)
else:
message += " (Caused by redirect)"

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 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 LocationParseError(ValueError, HTTPError):
"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