mirror of
https://github.com/Hopiu/linkchecker.git
synced 2026-03-22 08:50:24 +00:00
097bb8a143
git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@1339 e7d03fd6-7b0d-0410-9947-9c21f3af8025
684 lines
23 KiB
Python
684 lines
23 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, re, urlparse, urllib2, time, traceback, socket, select, i18n
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from urllib import splituser, splitport, unquote
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from linkcheck import DNS, LinkCheckerError, getLinkPat, httplib2
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from linkcheck.parser import htmlsax
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DNS.DiscoverNameServers()
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import Config, StringUtil, test_support
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from linkparse import LinkFinder, MetaRobotsFinder, css_url_re
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from debug import *
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ws_at_start_or_end = re.compile(r"(^\s+)|(\s+$)").search
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# helper function for internal errors
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def internal_error ():
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print >>sys.stderr, i18n._("""\n********** 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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1) The URL or file you are testing
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2) Your commandline arguments and/or configuration.
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3) The system information below.
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If you disclose some information because its too private to you thats ok.
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I will try to help you nontheless (but you have to give me *something*
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I can work with ;).
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""") % Config.Email
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etype, value = sys.exc_info()[:2]
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print >>sys.stderr, etype, value
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traceback.print_exc()
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print_app_info()
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print >>sys.stderr, i18n._("\n******** LinkChecker internal error, bailing out ********")
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sys.exit(1)
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def print_app_info ():
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import os
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print >>sys.stderr, i18n._("System info:")
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print >>sys.stderr, Config.App
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print >>sys.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 >>sys.stderr, key, "=", repr(value)
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def get_absolute_url (urlName, baseRef, parentName):
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"""Search for the absolute url to detect the link type. This does not
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join any url fragments together! Returns the url in lower case to
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simplify urltype matching."""
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if urlName and ":" in urlName:
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return urlName.lower()
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elif baseRef and ":" in baseRef:
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return baseRef.lower()
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elif parentName and ":" in parentName:
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return parentName.lower()
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return ""
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# we catch these exceptions, all other exceptions are internal
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# or system errors
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ExcList = [
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IOError,
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ValueError, # from httplib.py
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LinkCheckerError,
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DNS.Error,
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socket.timeout,
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socket.error,
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select.error,
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]
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if hasattr(socket, "sslerror"):
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ExcList.append(socket.sslerror)
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# regular expression for port numbers
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is_valid_port = re.compile(r"\d+").match
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def GetUrlDataFrom (urlName, recursionLevel, config, parentName=None,
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baseRef=None, line=0, column=0, name=None,
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cmdline=None):
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from FileUrlData import FileUrlData
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from IgnoredUrlData import IgnoredUrlData, ignored_schemes_re
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from FtpUrlData import FtpUrlData
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from GopherUrlData import GopherUrlData
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from HttpUrlData import HttpUrlData
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from HttpsUrlData import HttpsUrlData
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from MailtoUrlData import MailtoUrlData
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from TelnetUrlData import TelnetUrlData
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from NntpUrlData import NntpUrlData
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url = get_absolute_url(urlName, baseRef, parentName)
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# test scheme
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if url.startswith("http:"):
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klass = HttpUrlData
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elif url.startswith("ftp:"):
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klass = FtpUrlData
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elif url.startswith("file:"):
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klass = FileUrlData
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elif url.startswith("telnet:"):
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klass = TelnetUrlData
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elif url.startswith("mailto:"):
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klass = MailtoUrlData
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elif url.startswith("gopher:"):
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klass = GopherUrlData
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elif url.startswith("https:"):
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klass = HttpsUrlData
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elif url.startswith("nttp:") or \
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url.startswith("news:") or \
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url.startswith("snews:"):
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klass = NntpUrlData
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# application specific links are ignored
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elif ignored_schemes_re.search(url):
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klass = IgnoredUrlData
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# assume local file
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else:
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klass = FileUrlData
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if config['strict'] and cmdline and \
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not (config['internlinks'] or config['externlinks']):
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# set automatic intern/extern stuff if no filter was given
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set_intern_url(url, klass, config)
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return klass(urlName, recursionLevel, config, parentName, baseRef,
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line=line, column=column, name=name)
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def set_intern_url (url, klass, config):
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"""Precondition: config['strict'] is true (ie strict checking) and
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recursion level is zero (ie url given on the command line)"""
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from FileUrlData import FileUrlData
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from FtpUrlData import FtpUrlData
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from HttpUrlData import HttpUrlData
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from HttpsUrlData import HttpsUrlData
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if klass == FileUrlData:
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debug(BRING_IT_ON, "Add intern pattern ^file:")
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config['internlinks'].append(getLinkPat("^file:"))
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elif klass in [HttpUrlData, HttpsUrlData, FtpUrlData]:
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domain = urlparse.urlsplit(url)[1]
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if domain:
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domain = "://%s"%re.escape(domain)
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debug(BRING_IT_ON, "Add intern domain", domain)
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# add scheme colon to link pattern
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config['internlinks'].append(getLinkPat(domain))
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class UrlData (object):
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"Representing a URL with additional information like validity etc"
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def __init__ (self,
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urlName,
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recursionLevel,
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config,
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parentName = None,
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baseRef = None,
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line = 0,
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column = 0,
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name = ""):
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self.urlName = urlName
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self.anchor = None
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self.recursionLevel = recursionLevel
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self.config = config
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self.parentName = parentName
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self.baseRef = baseRef
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self.errorString = i18n._("Error")
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self.validString = i18n._("Valid")
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self.warningString = None
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self.infoString = None
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self.valid = True
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self.url = None
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self.urlparts = None
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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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self.dltime = -1
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self.dlsize = -1
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self.checktime = 0
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self.cached = False
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self.urlConnection = None
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self.extern = (1, 0)
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self.data = None
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self.has_content = False
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url = get_absolute_url(self.urlName, self.baseRef, self.parentName)
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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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def setError (self, s):
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self.valid = False
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self.errorString = i18n._("Error")+": "+s
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def setValid (self, s):
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self.valid = True
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self.validString = i18n._("Valid")+": "+s
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def isParseable (self):
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return False
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def isHtml (self):
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return False
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def isHttp (self):
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return False
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def isFile (self):
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return False
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def setWarning (self, s):
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if self.warningString:
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self.warningString += "\n"+s
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else:
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self.warningString = s
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def setInfo (self, s):
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if self.infoString:
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self.infoString += "\n"+s
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else:
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self.infoString = s
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def copyFromCache (self, cacheData):
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"""fill attributes from cache data"""
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self.errorString = cacheData["errorString"]
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self.validString = cacheData["validString"]
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if self.warningString:
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if cacheData["warningString"]:
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self.warningString += "\n"+cacheData["warningString"]
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else:
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self.warningString = cacheData["warningString"]
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self.infoString = cacheData["infoString"]
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self.valid = cacheData["valid"]
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self.dltime = cacheData["dltime"]
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def getCacheData (self):
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"""return all data values that should be put in the cache"""
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return {"errorString": self.errorString,
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"validString": self.validString,
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"warningString": self.warningString,
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"infoString": self.infoString,
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"valid": self.valid,
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"dltime": self.dltime,
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}
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def buildUrl (self):
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if self.baseRef:
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if ":" not in self.baseRef:
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self.baseRef = urlparse.urljoin(self.parentName, self.baseRef)
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self.url = urlparse.urljoin(self.baseRef, self.urlName)
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elif self.parentName:
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self.url = urlparse.urljoin(self.parentName, self.urlName)
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else:
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self.url = self.urlName
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# unquote url
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self.url = unquote(self.url)
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# split into (modifiable) list
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self.urlparts = list(urlparse.urlsplit(self.url))
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# check userinfo@host:port syntax
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self.userinfo, host = splituser(self.urlparts[1])
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x, port = splitport(host)
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if port is not None and not is_valid_port(port):
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raise LinkCheckerError(i18n._("URL has invalid port number %r")\
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% str(port))
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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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def logMe (self):
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debug(BRING_IT_ON, "logging url")
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self.config.incrementLinknumber()
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if self.config["verbose"] or not self.valid or \
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(self.warningString and self.config["warnings"]):
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self.config.log_newUrl(self)
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def check (self):
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try:
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self._check()
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except KeyboardInterrupt:
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raise
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except (socket.error, select.error):
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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
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except test_support.Error:
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raise
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except:
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internal_error()
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def _check (self):
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debug(BRING_IT_ON, "Checking", self)
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if self.recursionLevel and self.config['wait']:
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debug(BRING_IT_ON, "sleeping for", self.config['wait'], "seconds")
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time.sleep(self.config['wait'])
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t = time.time()
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if not self.checkCache():
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return
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# apply filter
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debug(BRING_IT_ON, "extern =", self.extern)
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if self.extern[0] and (self.config["strict"] or self.extern[1]):
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self.setWarning(
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i18n._("outside of domain filter, checked only syntax"))
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self.logMe()
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return
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# check connection
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debug(BRING_IT_ON, "checking connection")
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try:
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self.checkConnection()
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if self.cached:
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return
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if self.config["anchors"]:
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self.checkAnchors()
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except tuple(ExcList):
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etype, evalue, etb = sys.exc_info()
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debug(HURT_ME_PLENTY, "exception", 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 = i18n._('Hostname not found')
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# make nicer error msg for bad status line
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if isinstance(evalue, httplib2.BadStatusLine):
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evalue = i18n._('Bad HTTP response %r')%str(evalue)
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self.setError(str(evalue))
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# check content
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warningregex = self.config["warningregex"]
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if warningregex and self.valid:
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debug(BRING_IT_ON, "checking content")
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try:
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self.checkContent(warningregex)
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except tuple(ExcList):
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value, tb = sys.exc_info()[1:]
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debug(HURT_ME_PLENTY, "exception", traceback.format_tb(tb))
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self.setError(str(value))
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self.checktime = time.time() - t
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# check recursion
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debug(BRING_IT_ON, "checking recursion")
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try:
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if self.allowsRecursion():
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self.parseUrl()
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# check content size
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self.checkSize()
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except tuple(ExcList):
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value, tb = sys.exc_info()[1:]
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debug(HURT_ME_PLENTY, "exception", traceback.format_tb(tb))
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self.setError(i18n._("could not parse content: %r")%str(value))
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# close
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self.closeConnection()
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self.logMe()
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debug(BRING_IT_ON, "caching")
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self.putInCache()
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def checkSyntax (self):
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debug(BRING_IT_ON, "checking syntax")
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if not self.urlName or self.urlName=="":
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self.setError(i18n._("URL is null or empty"))
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self.logMe()
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return False
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if ws_at_start_or_end(self.urlName):
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self.setError(i18n._("URL has whitespace at beginning or end"))
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self.logMe()
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return False
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try:
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self.buildUrl()
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self.extern = self._getExtern()
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except LinkCheckerError, msg:
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self.setError(str(msg))
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self.logMe()
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return False
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return True
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def checkCache (self):
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debug(BRING_IT_ON, "checking cache")
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for key in self.getCacheKeys():
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if self.config.urlCache_has_key(key):
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self.copyFromCache(self.config.urlCache_get(key))
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self.cached = True
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self.logMe()
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return False
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return True
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def closeConnection (self):
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# brute force closing
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if self.urlConnection is not None:
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try: self.urlConnection.close()
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except: pass
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# release variable for garbage collection
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self.urlConnection = None
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def putInCache (self):
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if not self.cached:
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data = self.getCacheData()
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for key in self.getCacheKeys():
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self.config.urlCache_set(key, data)
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self.config.urlSeen_set(key)
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self.cached = True
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def getCacheKeys (self):
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key = self.getCacheKey()
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if key is None:
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return []
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return [key]
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def isCached (self):
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key = self.getCacheKey()
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return self.cached or self.config.urlSeen_has_key(key)
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def getCacheKey (self):
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# note: the host is already lowercase
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if self.urlparts:
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if self.config["anchorcaching"]:
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# do not ignore anchor
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return urlparse.urlunsplit(self.urlparts)
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else:
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# removed anchor from cache key
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return urlparse.urlunsplit(self.urlparts[:4]+[''])
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return None
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def checkConnection (self):
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self.urlConnection = urllib2.urlopen(self.url)
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def allowsRecursion (self):
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# note: test self.valid before self.isParseable()
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return self.valid and \
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self.isParseable() and \
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self.hasContent() and \
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not self.isCached() and \
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(self.config["recursionlevel"] < 0 or
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self.recursionLevel < self.config["recursionlevel"]) and \
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not self.extern[0] and self.contentAllowsRobots()
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def contentAllowsRobots (self):
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if not self.isHtml():
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return True
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if not (self.isHttp() or self.isFile()):
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return True
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h = MetaRobotsFinder(self.getContent())
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p = htmlsax.parser(h)
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h.parser = p
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p.feed(self.getContent())
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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 checkAnchors (self):
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if not (self.valid and self.anchor and self.isHtml() and \
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self.hasContent()):
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# do not bother
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return
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debug(HURT_ME_PLENTY, "checking anchor", self.anchor)
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h = LinkFinder(self.getContent(), tags={'a': ['name'], None: ['id']})
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p = htmlsax.parser(h)
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h.parser = p
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p.feed(self.getContent())
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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.setWarning(i18n._("anchor #%s not found") % self.anchor)
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def _getExtern (self):
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if not (self.config["externlinks"] or self.config["internlinks"]):
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return (0, 0)
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# deny and allow external checking
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Config.debug(HURT_ME_PLENTY, "Url", self.url)
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if self.config["denyallow"]:
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for entry in self.config["externlinks"]:
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Config.debug(HURT_ME_PLENTY, "Extern entry", entry)
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match = entry['pattern'].search(self.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.config["internlinks"]:
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|
Config.debug(HURT_ME_PLENTY, "Intern entry", entry)
|
|
match = entry['pattern'].search(self.url)
|
|
if (entry['negate'] and not match) or \
|
|
(match and not entry['negate']):
|
|
return (0, 0)
|
|
return (0, 0)
|
|
else:
|
|
for entry in self.config["internlinks"]:
|
|
Config.debug(HURT_ME_PLENTY, "Intern entry", entry)
|
|
match = entry['pattern'].search(self.url)
|
|
if (entry['negate'] and not match) or \
|
|
(match and not entry['negate']):
|
|
return (0, 0)
|
|
for entry in self.config["externlinks"]:
|
|
Config.debug(HURT_ME_PLENTY, "Extern entry", entry)
|
|
match = entry['pattern'].search(self.url)
|
|
if (entry['negate'] and not match) or \
|
|
(match and not entry['negate']):
|
|
return (1, entry['strict'])
|
|
return (1,0)
|
|
|
|
|
|
def hasContent (self):
|
|
"""indicate wether url getContent() can be called"""
|
|
return True
|
|
|
|
|
|
def getContent (self):
|
|
"""Precondition: urlConnection is an opened URL."""
|
|
if not self.has_content:
|
|
self.has_content = True
|
|
t = time.time()
|
|
self.data = self.urlConnection.read()
|
|
self.dltime = time.time() - t
|
|
self.dlsize = len(self.data)
|
|
return self.data
|
|
|
|
|
|
def checkContent (self, warningregex):
|
|
"""if a warning expression was given, call this function to check it
|
|
against the content of this url"""
|
|
if not self.hasContent():
|
|
return
|
|
match = warningregex.search(self.getContent())
|
|
if match:
|
|
self.setWarning(i18n._("Found %r in link contents")%match.group())
|
|
|
|
|
|
def checkSize (self):
|
|
"""if a maximum size was given, call this function to check it
|
|
against the content size of this url"""
|
|
maxbytes = self.config["warnsizebytes"]
|
|
if maxbytes is not None and self.dlsize >= maxbytes:
|
|
self.setWarning(i18n._("Content size %s is larger than %s")%\
|
|
(StringUtil.strsize(self.dlsize),
|
|
StringUtil.strsize(maxbytes)))
|
|
|
|
|
|
def parseUrl (self):
|
|
# default parse type is html
|
|
debug(BRING_IT_ON, "Parsing recursively into", self)
|
|
self.parse_html();
|
|
|
|
|
|
def getUserPassword (self):
|
|
for auth in self.config["authentication"]:
|
|
if auth['pattern'].match(self.url):
|
|
return auth['user'], auth['password']
|
|
return None,None
|
|
|
|
|
|
def parse_html (self):
|
|
# search for a possible base reference
|
|
h = LinkFinder(self.getContent(), tags={'base': ['href']})
|
|
p = htmlsax.parser(h)
|
|
h.parser = p
|
|
p.feed(self.getContent())
|
|
p.flush()
|
|
h.parser = None
|
|
p.handler = None
|
|
baseRef = None
|
|
if len(h.urls)>=1:
|
|
baseRef = h.urls[0][0]
|
|
if len(h.urls)>1:
|
|
self.setWarning(i18n._(
|
|
"more than one <base> tag found, using only the first one"))
|
|
h = LinkFinder(self.getContent())
|
|
p = htmlsax.parser(h)
|
|
h.parser = p
|
|
p.feed(self.getContent())
|
|
p.flush()
|
|
h.parser = None
|
|
p.handler = None
|
|
for s in h.parse_info:
|
|
# the parser had warnings/errors
|
|
self.setWarning(s)
|
|
for url,line,column,name,codebase in h.urls:
|
|
if codebase:
|
|
base = codebase
|
|
else:
|
|
base = baseRef
|
|
debug(NIGHTMARE, "Put url %r in queue"%url)
|
|
self.config.appendUrl(GetUrlDataFrom(url,
|
|
self.recursionLevel+1, self.config,
|
|
parentName=self.url, baseRef=base,
|
|
line=line, column=column, name=name))
|
|
|
|
|
|
def parse_opera (self):
|
|
# parse an opera bookmark file
|
|
name = ""
|
|
lineno = 0
|
|
lines = self.getContent().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:
|
|
self.config.appendUrl(GetUrlDataFrom(url,
|
|
self.recursionLevel+1, self.config, self.url, None, lineno, name))
|
|
name = ""
|
|
|
|
|
|
def parse_text (self):
|
|
"""parse a text file with on url per line; comment and blank
|
|
lines are ignored
|
|
UNUSED and UNTESTED, just use linkchecker `cat file.txt`
|
|
"""
|
|
lineno = 0
|
|
for line in self.getContent().splitlines():
|
|
lineno += 1
|
|
line = line.strip()
|
|
if not line or line.startswith('#'): continue
|
|
self.config.appendUrl(GetUrlDataFrom(line, self.recursionLevel+1,
|
|
self.config, parentName=self.url, line=lineno))
|
|
|
|
|
|
def parse_css (self):
|
|
"""parse a CSS file for url() patterns"""
|
|
lineno = 0
|
|
for line in self.getContent().splitlines():
|
|
lineno += 1
|
|
for mo in css_url_re.finditer(line):
|
|
column = mo.start("url")
|
|
self.config.appendUrl(GetUrlDataFrom(mo.group("url"),
|
|
self.recursionLevel+1, self.config,
|
|
parentName=self.url, line=lineno, column=column))
|
|
|
|
|
|
def __str__ (self):
|
|
return ("%s link\n"
|
|
"urlname=%s\n"
|
|
"parentName=%s\n"
|
|
"baseRef=%s\n"
|
|
"cached=%s\n"
|
|
"recursionLevel=%s\n"
|
|
"urlConnection=%s\n"
|
|
"line=%s\n"
|
|
"column=%s\n"
|
|
"name=%s" % \
|
|
(self.scheme, self.urlName, self.parentName, self.baseRef,
|
|
self.cached, self.recursionLevel, self.urlConnection, self.line,
|
|
self.column, self.name))
|
|
|