mirror of
https://github.com/Hopiu/linkchecker.git
synced 2026-03-17 06:20:27 +00:00
e9805dbd8a
git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@3887 e7d03fd6-7b0d-0410-9947-9c21f3af8025
99 lines
2.9 KiB
Python
99 lines
2.9 KiB
Python
# -*- coding: iso-8859-1 -*-
|
|
# Copyright (C) 2005-2009 Bastian Kleineidam
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
"""
|
|
Helper functions dealing with HTTP headers.
|
|
"""
|
|
|
|
DEFAULT_TIMEOUT_SECS = 300
|
|
|
|
def has_header_value (headers, name, value):
|
|
"""
|
|
Look in headers for a specific header name and value.
|
|
Both name and value are case insensitive.
|
|
|
|
@return: True if header name and value are found
|
|
@rtype: bool
|
|
"""
|
|
name = name.lower()
|
|
value = value.lower()
|
|
for hname, hvalue in headers:
|
|
if hname.lower()==name and hvalue.lower()==value:
|
|
return True
|
|
return False
|
|
|
|
|
|
def http_persistent (response):
|
|
"""
|
|
See if the HTTP connection can be kept open according the the
|
|
header values found in the response object.
|
|
|
|
@param response: response instance
|
|
@type response: httplib.HTTPResponse
|
|
@return: True if connection is persistent
|
|
@rtype: bool
|
|
"""
|
|
headers = response.getheaders()
|
|
if response.version == 11:
|
|
return not has_header_value(headers, 'Connection', 'Close')
|
|
return has_header_value(headers, "Connection", "Keep-Alive")
|
|
|
|
|
|
def http_timeout (response):
|
|
"""
|
|
Get HTTP timeout value, either from the Keep-Alive header or a
|
|
default value.
|
|
|
|
@param response: response instance
|
|
@type response: httplib.HTTPResponse
|
|
@return: timeout
|
|
@rtype: int
|
|
"""
|
|
timeout = response.getheader("Keep-Alive")
|
|
if timeout is not None:
|
|
try:
|
|
timeout = int(timeout[8:].strip())
|
|
except ValueError:
|
|
timeout = DEFAULT_TIMEOUT_SECS
|
|
else:
|
|
timeout = DEFAULT_TIMEOUT_SECS
|
|
return timeout
|
|
|
|
|
|
def get_content_type (headers):
|
|
"""
|
|
Get the MIME type from the Content-Type header value, or
|
|
'application/octet-stream' if not found.
|
|
|
|
@return: MIME type
|
|
@rtype: string
|
|
"""
|
|
ptype = headers.get('Content-Type', 'application/octet-stream')
|
|
if ";" in ptype:
|
|
# split off not needed extension info
|
|
ptype = ptype.split(';')[0]
|
|
return ptype.strip().lower()
|
|
|
|
|
|
def get_content_encoding (headers):
|
|
"""
|
|
Get the content encoding from the Content-Encoding header value, or
|
|
an empty string if not found.
|
|
|
|
@return: encoding string
|
|
@rtype: string
|
|
"""
|
|
return headers.get("Content-Encoding", "").strip()
|