mirror of
https://github.com/Hopiu/linkchecker.git
synced 2026-03-24 01:40:23 +00:00
be5a59e9fd
git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@2010 e7d03fd6-7b0d-0410-9947-9c21f3af8025
641 lines
25 KiB
Python
641 lines
25 KiB
Python
# -*- coding: iso-8859-1 -*-
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"""Base URL handler"""
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# Copyright (C) 2000-2004 Bastian Kleineidam
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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import sys
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import os
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import re
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import urlparse
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import urllib2
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import urllib
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import time
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import traceback
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import socket
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import select
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import codecs
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import linkcheck
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import linkcheck.linkparse
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import linkcheck.strformat
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import linkcheck.containers
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import linkcheck.log
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import linkcheck.httplib2
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import linkcheck.HtmlParser.htmlsax
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stderr = codecs.getwriter("iso8859-1")(sys.stderr, errors="ignore")
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def internal_error ():
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"""print internal error message to stderr"""
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print >> stderr, os.linesep
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print >> stderr, _("""********** Oops, I did it again. *************
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You have found an internal error in LinkChecker. Please write a bug report
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at http://sourceforge.net/tracker/?func=add&group_id=1913&atid=101913
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or send mail to %s and include the following information:
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- the URL or file you are testing
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- your commandline arguments and/or configuration.
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- the output of a debug run with option "-Dall" of the executed command
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- the system information below.
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Disclosing some of the information above due to privacy reasons is ok.
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I will try to help you nonetheless, but you have to give me something
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I can work with ;) .
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""") % linkcheck.configuration.Email
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etype, value = sys.exc_info()[:2]
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print >> stderr, etype, value
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traceback.print_exc()
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print_app_info()
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print >> stderr, os.linesep, \
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_("******** LinkChecker internal error, bailing out ********")
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sys.exit(1)
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def print_app_info ():
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"""print system and application info to stderr"""
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print >> stderr, _("System info:")
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print >> stderr, linkcheck.configuration.App
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print >> stderr, _("Python %s on %s") % (sys.version, sys.platform)
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for key in ("LC_ALL", "LC_MESSAGES", "http_proxy", "ftp_proxy"):
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value = os.getenv(key)
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if value is not None:
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print >> stderr, key, "=", repr(value)
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def urljoin (parent, url, scheme):
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if url.startswith(scheme+":"):
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return url
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return urlparse.urljoin(parent, url)
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class UrlBase (object):
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"""An URL with additional information like validity etc."""
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def __init__ (self, base_url, recursion_level, consumer,
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parent_url = None, base_ref = None,
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line = -1, column = -1, name = u""):
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"""Initialize check data, and store given variables.
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@base_url - unquoted and possibly unnormed url
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@recursion_level - on what check level lies the base url
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@config - Configuration instance
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@parent_url - quoted and normed url of parent or None
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@base_ref - quoted and normed url of <base href=""> or None
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@line - line number of url in parent content
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@column - column number of url in parent content
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@name - name of url or empty
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"""
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self.base_ref = base_ref
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# note that self.base_url must not be modified
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self.base_url = base_url
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self.parent_url = parent_url
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self.recursion_level = recursion_level
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self.consumer = consumer
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self.line = line
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self.column = column
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self.name = name
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if self.base_ref:
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assert not linkcheck.url.url_needs_quoting(self.base_ref), \
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"unquoted %r" % self.base_ref
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if self.parent_url:
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assert not linkcheck.url.url_needs_quoting(self.parent_url), \
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"unquoted %r" % self.parent_url
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url = linkcheck.checker.absolute_url(base_url, base_ref, parent_url)
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# assume file link if no scheme is found
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self.scheme = url.split(":", 1)[0] or "file"
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# self.url is constructed by self.build_url() out of base_url
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# and (base_ref or parent) as absolute and normed url.
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# This the real url we use when checking so it also referred to
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# as 'real url'
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self.url = None
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# a splitted version of url for convenience
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self.urlparts = None
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# the anchor part of url
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self.anchor = None
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# the result message string
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self.result = u""
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# cached or not
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self.cached = False
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# valid or not
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self.valid = True
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# list of warnings (without duplicates)
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self.warning = linkcheck.containers.SetList()
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# list of infos (without duplicates)
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self.info = linkcheck.containers.SetList()
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# download time
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self.dltime = -1
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# download size
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self.dlsize = -1
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# check time
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self.checktime = 0
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# connection object
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self.url_connection = None
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self.extern = (1, 0)
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# data of url content
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self.data = None
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# if data is filled
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self.has_content = False
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# cache keys, are set by build_url() calling set_cache_keys()
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self.cache_url_key = None
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self.cache_content_key = None
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# alias list
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self.aliases = []
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def set_result (self, msg, valid=True):
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"""set result string and validity"""
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self.result = msg
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self.valid = valid
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def is_parseable (self):
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"""return True iff content of this url is parseable"""
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return False
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def is_html (self):
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"""return True iff content of this url is HTML formatted"""
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return False
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def is_http (self):
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"""return True for http:// URLs"""
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return False
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def is_file (self):
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"""return True for file:// URLs"""
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return False
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def add_warning (self, s):
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"""add a warning string"""
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self.warning.append(s)
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def add_info (self, s):
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"""add an info string"""
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self.info.append(s)
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def copy_from_cache (self, cache_data):
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"""fill attributes from cache data"""
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self.result = cache_data["result"]
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self.warning.extend(cache_data["warning"])
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self.info.extend(cache_data["info"])
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self.valid = cache_data["valid"]
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self.dltime = cache_data["dltime"]
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self.dlsize = cache_data["dlsize"]
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self.cached = True
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def get_cache_data (self):
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"""return all data values that should be put in the cache"""
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return {"result": self.result,
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"warning": self.warning,
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"info": self.info,
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"valid": self.valid,
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"dltime": self.dltime,
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"dlsize": self.dlsize,
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}
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def set_cache_keys (self):
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"""Set keys for URL checking and content recursion."""
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# remove anchor from content cache key since we assume
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# URLs with different anchors to have the same content
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self.cache_content_key = urlparse.urlunsplit(self.urlparts[:4]+[u''])
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assert isinstance(self.cache_content_key, unicode), \
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self.cache_content_key
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linkcheck.log.debug(linkcheck.LOG_CACHE, "Content cache key %r",
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self.cache_content_key)
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# construct cache key
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if self.consumer.config["anchorcaching"] and \
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self.consumer.config["anchors"]:
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# do not ignore anchor
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parts = self.urlparts[:]
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parts[4] = self.anchor
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if self.userinfo:
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parts[1] = self.userinfo+"@"+parts[1]
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self.cache_url_key = urlparse.urlunsplit(parts)
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else:
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# no anchor caching
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self.cache_url_key = self.cache_content_key
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assert isinstance(self.cache_url_key, unicode), self.cache_url_key
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linkcheck.log.debug(linkcheck.LOG_CACHE, "URL cache key %r",
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self.cache_url_key)
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def check_syntax (self):
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"""Called before self.check(), this function inspects the
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url syntax. Success enables further checking, failure
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immediately logs this url. Syntax checks must not
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use any network resources.
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"""
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linkcheck.log.debug(linkcheck.LOG_CHECK, "checking syntax")
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if not self.base_url:
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self.set_result(_("URL is empty"), valid=False)
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return False
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try:
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self.build_url()
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except linkcheck.LinkCheckerError, msg:
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self.set_result(str(msg), valid=False)
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return False
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self.set_cache_keys()
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self.extern = self._get_extern(self.url)
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return True
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def build_url (self):
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"""Construct self.url and self.urlparts out of the given base
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url information self.base_url, self.parent_url and self.base_ref.
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"""
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# norm base url
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base_url, is_idn = linkcheck.url.url_norm(self.base_url)
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if is_idn:
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self.add_warning(_("""URL %s has a unicode domain name which
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is not yet widely supported. You should use
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the URL %s instead.""") % (self.base_url, base_url))
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elif self.base_url != base_url:
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self.add_warning(
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_("Base URL is not properly normed. Normed url is %(url)s.") % \
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{'url': base_url})
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# make url absolute
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if self.base_ref:
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# use base reference as parent url
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if ":" not in self.base_ref:
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# some websites have a relative base reference
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self.base_ref = urljoin(self.parent_url, self.base_ref,
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self.scheme)
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self.url = urljoin(self.base_ref, base_url, self.scheme)
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elif self.parent_url:
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self.url = urljoin(self.parent_url, base_url, self.scheme)
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else:
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self.url = base_url
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# split into (modifiable) list
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self.urlparts = list(urlparse.urlsplit(self.url))
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# and unsplit again
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self.url = urlparse.urlunsplit(self.urlparts)
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# check userinfo@host:port syntax
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self.userinfo, host = urllib.splituser(self.urlparts[1])
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# set host lowercase and without userinfo
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self.urlparts[1] = host.lower()
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# safe anchor for later checking
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self.anchor = self.urlparts[4]
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self.host, self.port = urllib.splitport(host)
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if self.port is not None:
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if not linkcheck.url.is_numeric_port(self.port):
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raise linkcheck.LinkCheckerError(
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_("URL has invalid port %r") % str(self.port))
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self.port = int(self.port)
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def check (self):
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"""main check function for checking this URL"""
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try:
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self.local_check()
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self.consumer.checked(self)
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except (socket.error, select.error):
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self.consumer.interrupted(self)
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# on Unix, ctrl-c can raise
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# error: (4, 'Interrupted system call')
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etype, value = sys.exc_info()[:2]
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if etype == 4:
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raise KeyboardInterrupt(value)
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else:
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raise
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except KeyboardInterrupt:
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self.consumer.interrupted(self)
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raise
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except:
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self.consumer.interrupted(self)
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internal_error()
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def local_check (self):
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"""local check function can be overridden in subclasses"""
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linkcheck.log.debug(linkcheck.LOG_CHECK, "Checking %s", self)
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if self.recursion_level and self.consumer.config['wait']:
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linkcheck.log.debug(linkcheck.LOG_CHECK,
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"sleeping for %d seconds",
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self.consumer.config['wait'])
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time.sleep(self.consumer.config['wait'])
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t = time.time()
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if self.is_extern():
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self.add_info(_("Outside of domain filter, checked only syntax."))
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return
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# check connection
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linkcheck.log.debug(linkcheck.LOG_CHECK, "checking connection")
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try:
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self.check_connection()
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if self.consumer.config["anchors"]:
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self.check_anchors()
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except tuple(linkcheck.checker.ExcList):
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etype, evalue, etb = sys.exc_info()
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linkcheck.log.debug(linkcheck.LOG_CHECK, "exception %s",
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traceback.format_tb(etb))
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# make nicer error msg for unknown hosts
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if isinstance(evalue, socket.error) and evalue[0] == -2:
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evalue = _('Hostname not found')
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# make nicer error msg for bad status line
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if isinstance(evalue, linkcheck.httplib2.BadStatusLine):
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evalue = _('Bad HTTP response %r') % str(evalue)
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self.set_result(str(evalue), valid=False)
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# check content
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warningregex = self.consumer.config["warningregex"]
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if warningregex and self.valid:
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linkcheck.log.debug(linkcheck.LOG_CHECK, "checking content")
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try:
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self.check_content(warningregex)
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except tuple(linkcheck.checker.ExcList):
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value, tb = sys.exc_info()[1:]
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linkcheck.log.debug(linkcheck.LOG_CHECK, "exception %s",
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traceback.format_tb(tb))
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self.set_result(str(value), valid=False)
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self.checktime = time.time() - t
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# check recursion
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linkcheck.log.debug(linkcheck.LOG_CHECK, "checking recursion...")
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try:
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if self.allows_recursion():
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self.parse_url()
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else:
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linkcheck.log.debug(linkcheck.LOG_CHECK, "...no recursion")
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# check content size
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self.check_size()
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except tuple(linkcheck.checker.ExcList):
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value, tb = sys.exc_info()[1:]
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linkcheck.log.debug(linkcheck.LOG_CHECK, "exception %s",
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traceback.format_tb(tb))
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self.set_result(_("could not parse content: %r") % str(value),
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valid=False)
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# close
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self.close_connection()
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def close_connection (self):
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"""close an opened url connection"""
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# brute force closing
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if self.url_connection is not None:
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try:
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self.url_connection.close()
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except:
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# ignore close errors
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pass
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# release variable for garbage collection
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self.url_connection = None
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def check_connection (self):
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"""The basic connection check uses urllib2.urlopen to initialize
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a connection object.
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"""
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self.url_connection = urllib2.urlopen(self.url)
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def allows_recursion (self):
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"""return True iff we can recurse into the url's content"""
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# note: test self.valid before self.is_parseable()
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linkcheck.log.debug(linkcheck.LOG_CHECK, "valid=%s, parseable=%s, "\
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"content=%s, extern=%s, robots=%s",
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self.valid, self.is_parseable(),
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self.can_get_content(),
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self.extern[0],
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self.content_allows_robots())
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return self.valid and \
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self.is_parseable() and \
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self.can_get_content() and \
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(self.consumer.config["recursionlevel"] < 0 or
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self.recursion_level < self.consumer.config["recursionlevel"]) and \
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not self.extern[0] and self.content_allows_robots()
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def content_allows_robots (self):
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"""return True if the content of this URL forbids robots to
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search for recursive links.
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"""
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if not self.is_html():
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return True
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if not (self.is_http() or self.is_file()):
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return True
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h = linkcheck.linkparse.MetaRobotsFinder(self.get_content())
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p = linkcheck.HtmlParser.htmlsax.parser(h)
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h.parser = p
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p.feed(self.get_content())
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p.flush()
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h.parser = None
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p.handler = None
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return h.follow
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def check_anchors (self):
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if not (self.valid and self.anchor and self.is_html() and \
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self.can_get_content()):
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# do not bother
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return
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linkcheck.log.debug(linkcheck.LOG_CHECK, "checking anchor %r",
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self.anchor)
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h = linkcheck.linkparse.LinkFinder(self.get_content(),
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tags={'a': [u'name'], None: [u'id']})
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p = linkcheck.HtmlParser.htmlsax.parser(h)
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h.parser = p
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p.feed(self.get_content())
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p.flush()
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h.parser = None
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p.handler = None
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for cur_anchor, line, column, name, base in h.urls:
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if cur_anchor == self.anchor:
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return
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self.add_warning(_("Anchor #%s not found.") % self.anchor)
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def is_extern (self):
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# apply filter
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linkcheck.log.debug(linkcheck.LOG_CHECK, "extern=%s", self.extern)
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return self.extern[0] and \
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(self.consumer.config["externstrictall"] or self.extern[1])
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def _get_extern (self, url):
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if not (self.consumer.config["externlinks"] or \
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self.consumer.config["internlinks"]):
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return (0, 0)
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# deny and allow external checking
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linkcheck.log.debug(linkcheck.LOG_CHECK, "Url %r", url)
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if self.consumer.config["denyallow"]:
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for entry in self.consumer.config["externlinks"]:
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linkcheck.log.debug(linkcheck.LOG_CHECK, "Extern entry %r",
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entry)
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match = entry['pattern'].search(url)
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if (entry['negate'] and not match) or \
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(match and not entry['negate']):
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return (1, entry['strict'])
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for entry in self.consumer.config["internlinks"]:
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linkcheck.log.debug(linkcheck.LOG_CHECK, "Intern entry %r",
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entry)
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match = entry['pattern'].search(url)
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if (entry['negate'] and not match) or \
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(match and not entry['negate']):
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return (0, 0)
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return (0, 0)
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else:
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for entry in self.consumer.config["internlinks"]:
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linkcheck.log.debug(linkcheck.LOG_CHECK, "Intern entry %r",
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entry)
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match = entry['pattern'].search(url)
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if (entry['negate'] and not match) or \
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(match and not entry['negate']):
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return (0, 0)
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for entry in self.consumer.config["externlinks"]:
|
|
linkcheck.log.debug(linkcheck.LOG_CHECK, "Extern entry %r",
|
|
entry)
|
|
match = entry['pattern'].search(url)
|
|
if (entry['negate'] and not match) or \
|
|
(match and not entry['negate']):
|
|
return (1, entry['strict'])
|
|
return (1, 0)
|
|
|
|
def can_get_content (self):
|
|
"""indicate wether url get_content() can be called"""
|
|
return True
|
|
|
|
def get_content (self):
|
|
"""Precondition: url_connection is an opened URL."""
|
|
if not self.has_content:
|
|
t = time.time()
|
|
self.data = self.url_connection.read()
|
|
self.dltime = time.time() - t
|
|
self.dlsize = len(self.data)
|
|
self.has_content = True
|
|
return self.data
|
|
|
|
def check_content (self, warningregex):
|
|
"""If a warning expression was given, call this function to check it
|
|
against the content of this url.
|
|
"""
|
|
if not self.can_get_content():
|
|
return
|
|
match = warningregex.search(self.get_content())
|
|
if match:
|
|
self.add_warning(_("Found %r in link contents.") % match.group())
|
|
|
|
def check_size (self):
|
|
"""if a maximum size was given, call this function to check it
|
|
against the content size of this url"""
|
|
maxbytes = self.consumer.config["warnsizebytes"]
|
|
if maxbytes is not None and self.dlsize >= maxbytes:
|
|
self.add_warning(_("Content size %s is larger than %s.") % \
|
|
(linkcheck.strformat.strsize(self.dlsize),
|
|
linkcheck.strformat.strsize(maxbytes)))
|
|
|
|
def parse_url (self):
|
|
"""Parse url content and search for recursive links.
|
|
Default parse type is html.
|
|
"""
|
|
linkcheck.log.debug(linkcheck.LOG_CHECK,
|
|
"Parsing recursively into %s", self)
|
|
self.parse_html()
|
|
|
|
def get_user_password (self):
|
|
"""Get tuple (user, password) from configured authentication.
|
|
Both user and password can be None if not specified.
|
|
"""
|
|
for auth in self.consumer.config["authentication"]:
|
|
if auth['pattern'].match(self.url):
|
|
return auth['user'], auth['password']
|
|
return None, None
|
|
|
|
def parse_html (self):
|
|
"""Parse into HTML content and search for URLs to check.
|
|
Found URLs are added to the URL queue.
|
|
"""
|
|
h = linkcheck.linkparse.LinkFinder(self.get_content())
|
|
p = linkcheck.HtmlParser.htmlsax.parser(h)
|
|
h.parser = p
|
|
p.feed(self.get_content())
|
|
p.flush()
|
|
h.parser = None
|
|
p.handler = None
|
|
for s in h.parse_info:
|
|
# the parser had warnings/errors
|
|
self.add_warning(s)
|
|
for url, line, column, name, codebase in h.urls:
|
|
if codebase:
|
|
base_ref = codebase
|
|
else:
|
|
base_ref = h.base_ref
|
|
url_data = linkcheck.checker.get_url_from(url,
|
|
self.recursion_level+1, self.consumer, parent_url=self.url,
|
|
base_ref=base_ref, line=line, column=column, name=name)
|
|
self.consumer.append_url(url_data)
|
|
|
|
def parse_opera (self):
|
|
"""parse an opera bookmark file"""
|
|
name = ""
|
|
lineno = 0
|
|
lines = self.get_content().splitlines()
|
|
for line in lines:
|
|
lineno += 1
|
|
line = line.strip()
|
|
if line.startswith("NAME="):
|
|
name = line[5:]
|
|
elif line.startswith("URL="):
|
|
url = line[4:]
|
|
if url:
|
|
url_data = linkcheck.checker.get_url_from(url,
|
|
self.recursion_level+1, self.consumer,
|
|
parent_url=self.url, line=lineno, name=name)
|
|
self.consumer.append_url(url_data)
|
|
name = ""
|
|
|
|
def parse_text (self):
|
|
"""parse a text file with on url per line; comment and blank
|
|
lines are ignored
|
|
"""
|
|
lineno = 0
|
|
for line in self.get_content().splitlines():
|
|
lineno += 1
|
|
line = line.strip()
|
|
if not line or line.startswith('#'):
|
|
continue
|
|
url_data = linkcheck.checker.get_url_from(line,
|
|
self.recursion_level+1, self.consumer,
|
|
parent_url=self.url, line=lineno)
|
|
self.consumer.append_url(url_data)
|
|
|
|
def parse_css (self):
|
|
"""parse a CSS file for url() patterns"""
|
|
lineno = 0
|
|
for line in self.get_content().splitlines():
|
|
lineno += 1
|
|
for mo in linkcheck.linkparse.css_url_re.finditer(line):
|
|
column = mo.start("url")
|
|
url = linkcheck.strformat.unquote(mo.group("url").strip())
|
|
url_data = linkcheck.checker.get_url_from(url,
|
|
self.recursion_level+1, self.consumer,
|
|
parent_url=self.url, line=lineno, column=column)
|
|
self.consumer.append_url(url_data)
|
|
|
|
def serialized (self):
|
|
"""return serialized url check data as unicode string"""
|
|
sep = unicode(os.linesep)
|
|
assert isinstance(self.base_url, unicode), self.base_url
|
|
if self.parent_url is not None:
|
|
assert isinstance(self.parent_url, unicode), self.parent_url
|
|
if self.base_ref is not None:
|
|
assert isinstance(self.base_ref, unicode), self.base_ref
|
|
assert isinstance(self.name, unicode), self.name
|
|
return sep.join([
|
|
u"%s link" % self.scheme,
|
|
u"base_url=%s" % self.base_url,
|
|
u"parent_url=%s" % self.parent_url,
|
|
u"base_ref=%s" % self.base_ref,
|
|
u"recursion_level=%s" % self.recursion_level,
|
|
u"url_connection=%s" % self.url_connection,
|
|
u"line=%d" % self.line,
|
|
u"column=%d" % self.column,
|
|
u"name=%s" % self.name,
|
|
])
|
|
|
|
def __str__ (self):
|
|
s = self.serialized()
|
|
return self.consumer.config['logger'].encode(s)
|
|
|
|
def __repr__ (self):
|
|
return u"<%s >" % self.serialized()
|