JezK
Edit File: error.py
"""Exception classes raised by urllib. The base exception class is URLError, which inherits from IOError. It doesn't define any behavior of its own, but is the base class for all exceptions defined in this package. HTTPError is an exception class that is also a valid HTTP response instance. It behaves this way because HTTP protocol errors are valid responses, with a status code, headers, and a body. In some contexts, an application may want to handle an exception like a regular response. """ import urllib.response # do these error classes make sense? # make sure all of the IOError stuff is overridden. we just want to be # subtypes. class URLError(IOError): # URLError is a sub-type of IOError, but it doesn't share any of # the implementation. need to override __init__ and __str__. # It sets self.args for compatibility with other EnvironmentError # subclasses, but args doesn't have the typical format with errno in # slot 0 and strerror in slot 1. This may be better than nothing. def __init__(self, reason, filename=None): self.args = reason, self.reason = reason if filename is not None: self.filename = filename def __str__(self): return '<urlopen error %s>' % self.reason class HTTPError(URLError, urllib.response.addinfourl): """Raised when HTTP error occurs, but also acts like non-error return""" __super_init = urllib.response.addinfourl.__init__ def __init__(self, url, code, msg, hdrs, fp): self.code = code self.msg = msg self.hdrs = hdrs self.fp = fp self.filename = url # The addinfourl classes depend on fp being a valid file # object. In some cases, the HTTPError may not have a valid # file object. If this happens, the simplest workaround is to # not initialize the base classes. if fp is not None: self.__super_init(fp, hdrs, url, code) def __str__(self): return 'HTTP Error %s: %s' % (self.code, self.msg) # since URLError specifies a .reason attribute, HTTPError should also # provide this attribute. See issue13211 for discussion. @property def reason(self): return self.msg # exception raised when downloaded size does not match content-length class ContentTooShortError(URLError): def __init__(self, message, content): URLError.__init__(self, message) self.content = content