mirror of
https://github.com/janeczku/calibre-web
synced 2024-11-07 02:26:22 +00:00
75 lines
2.1 KiB
Python
75 lines
2.1 KiB
Python
|
from __future__ import absolute_import
|
||
|
|
from ..packages.six.moves import http_client as httplib
|
||
|
|
|
||
|
|
from ..exceptions import HeaderParsingError
|
||
|
|
|
||
|
|
|
||
|
|
def is_fp_closed(obj):
|
||
|
|
"""
|
||
|
|
Checks whether a given file-like object is closed.
|
||
|
|
|
||
|
|
:param obj:
|
||
|
|
The file-like object to check.
|
||
|
|
"""
|
||
|
|
|
||
|
|
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 headers: Headers to verify.
|
||
|
|
:type headers: `httplib.HTTPMessage`.
|
||
|
|
|
||
|
|
: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: # Platform-specific: Python 3.
|
||
|
|
unparsed_data = get_payload()
|
||
|
|
|
||
|
|
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 conn:
|
||
|
|
:type conn: :class:`httplib.HTTPResponse`
|
||
|
|
"""
|
||
|
|
# 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'
|