Filename: //lib//python3/dist-packages//urllib3///util//response.py

from __future__ import absolute_import from email.errors import MultipartInvariantViolationDefect, StartBoundaryNotFoundDefect from ..exceptions import HeaderParsingError from six.moves import http_client as httplib def is_fp_closed(obj): """ Checks whether a given file-like object is closed. :param obj: The file-like object to check. """ try: # Check `isclosed()` first, in case Python3 doesn't set `closed`. # GH Issue #928 return obj.isclosed() except AttributeError: pass try: # Check via the official file-like-object way. return obj.closed except AttributeError: pass try: # Check if the object is a container for another file-like object that # gets released on exhaustion (e.g. HTTPResponse). return obj.fp is None except AttributeError: pass raise ValueError("Unable to determine whether fp is closed.") def assert_header_parsing(headers): """ Asserts whether all headers have been successfully parsed. Extracts encountered errors from the result of parsing headers. Only works on Python 3. :param http.client.HTTPMessage headers: Headers to verify. :raises urllib3.exceptions.HeaderParsingError: If parsing errors are found. """ # This will fail silently if we pass in the wrong kind of parameter. # To make debugging easier add an explicit check. if not isinstance(headers, httplib.HTTPMessage): raise TypeError("expected httplib.Message, got {0}.".format(type(headers))) defects = getattr(headers, "defects", None) get_payload = getattr(headers, "get_payload", None) unparsed_data = None if get_payload: # get_payload is actually email.message.Message.get_payload; # we're only interested in the result if it's not a multipart message if not headers.is_multipart(): payload = get_payload() if isinstance(payload, (bytes, str)): unparsed_data = payload if defects: # httplib is assuming a response body is available # when parsing headers even when httplib only sends # header data to parse_headers() This results in # defects on multipart responses in particular. # See: https://github.com/urllib3/urllib3/issues/800 # So we ignore the following defects: # - StartBoundaryNotFoundDefect: # The claimed start boundary was never found. # - MultipartInvariantViolationDefect: # A message claimed to be a multipart but no subparts were found. defects = [ defect for defect in defects if not isinstance( defect, (StartBoundaryNotFoundDefect, MultipartInvariantViolationDefect) ) ] if defects or unparsed_data: raise HeaderParsingError(defects=defects, unparsed_data=unparsed_data) def is_response_to_head(response): """ Checks whether the request of a response has been a HEAD-request. Handles the quirks of AppEngine. :param http.client.HTTPResponse response: Response to check if the originating request used 'HEAD' as a method. """ # FIXME: Can we do this somehow without accessing private httplib _method? method = response._method if isinstance(method, int): # Platform-specific: Appengine return method == 3 return method.upper() == "HEAD"

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