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badlinks.py

# badlinks.py - plugin to list bad links
#
# Copyright (C) 1998, 1999 Albert Hopkins (marduk)
# Copyright (C) 2002 Mike W. Meyer
# Copyright (C) 2005, 2006, 2007 Arthur de Jong
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
#
# The files produced as output from the software do not automatically fall
# under the copyright of the software, unless explicitly stated otherwise.

"""Present a listing of links that point to non-existent pages."""

__title__ = 'bad links'
__author__ = 'Arthur de Jong'
__outputfile__ = 'badlinks.html'

import plugins

def generate(site):
    """Present the list of bad links to the given file descriptor."""
    # find all links with link problems
    links = [ x
              for x in site.linkMap.values()
              if len(x.linkproblems)>0 ]
    # sort list
    links.sort(lambda a, b: cmp(a.url, b.url))
    # present results
    fp = plugins.open_html(plugins.badlinks, site)
    if not links:
        fp.write(
          '   <p class="description">\n'
          '    There were no problems retrieving links from the website.\n'
          '   </p>\n' )
        plugins.close_html(fp)
        return
    fp.write(
      '   <p class="description">\n'
      '    These links could not be retrieved during the crawling of the website.\n'
      '   </p>\n'
      '   <ol>\n' )
    for link in links:
        # list the link
        fp.write(
          '    <li>\n'
          '     %(badurl)s\n'
          '     <ul class="problems">\n'
          % { 'badurl':  plugins.make_link(link,link.url) })
        # list the problems
        for problem in link.linkproblems:
            fp.write(
              '      <li>%(problem)s</li>\n'
              % { 'problem':  plugins.htmlescape(problem) })
        fp.write(
          '     </ul>\n')
        # present a list of parents
        link.parents.sort()
        plugins.print_parents(fp, link, '     ')
        # add a reference to the problem map
        for problem in link.linkproblems:
            for parent in link.parents:
                parent.add_pageproblem('bad link: ' + link.url + ': ' + problem)
        fp.write(
          '    </li>\n')
    fp.write(
      '   </ol>\n' )
    plugins.close_html(fp)

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