mirror of
https://github.com/PiBrewing/craftbeerpi4.git
synced 2024-11-23 07:28:13 +01:00
107 lines
3.4 KiB
Python
107 lines
3.4 KiB
Python
from __future__ import absolute_import
|
|
|
|
from email.errors import MultipartInvariantViolationDefect, StartBoundaryNotFoundDefect
|
|
|
|
from ..exceptions import HeaderParsingError
|
|
from ..packages.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"
|