mirror of
https://github.com/Hopiu/linkchecker.git
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f2e7ca6040
git-svn-id: https://linkchecker.svn.sourceforge.net/svnroot/linkchecker/trunk/linkchecker@1432 e7d03fd6-7b0d-0410-9947-9c21f3af8025
100 lines
3.5 KiB
Python
100 lines
3.5 KiB
Python
# -*- coding: iso-8859-1 -*-
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"""Handle nntp: and news: links"""
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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 re
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import time
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import sys
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import nntplib
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import urlparse
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import random
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import linkcheck
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import urlbase
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import linkcheck.log
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from linkcheck.i18n import _
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random.seed()
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class NntpUrl (urlbase.UrlBase):
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"Url link with NNTP scheme"
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def build_url (self):
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# use nntp instead of news to comply with the unofficial internet
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# draft of Alfred Gilman which unifies (s)news and nntp URLs
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# note: we use this only internally (for parsing and caching)
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if self.base_url[:4].lower() == 'news':
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self.url = 'nntp'+self.base_url[4:]
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else:
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self.url = self.base_url
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self.urlparts = urlparse.urlsplit(self.url)
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linkcheck.log.debug(linkcheck.LOG_CHECK, self.urlparts)
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def check_connection (self):
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nntpserver = self.urlparts[1] or self.consumer.config["nntpserver"]
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if not nntpserver:
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self.add_warning(_("No NNTP server specified, skipping this URL"))
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return
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nntp = self._connectNntp(nntpserver)
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group = self.urlparts[2]
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while group[:1] == '/':
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group = group[1:]
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if '@' in group:
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# request article
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resp, number, mid = nntp.stat("<"+group+">")
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self.add_info(_('Articel number %s found') % number)
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else:
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# split off trailing articel span
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group = group.split('/', 1)[0]
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if group:
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# request group info
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resp, count, first, last, name = nntp.group(group)
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self.add_info(_("Group %s has %s articles, range %s to %s") %\
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(name, count, first, last))
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else:
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# group name is the empty string
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self.add_warning(_("No newsgroup specified in NNTP URL"))
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def _connectNntp (self, nntpserver):
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"""This is done only once per checking task. Also, the newly
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introduced error codes 504 and 505 (both inclining "Too busy, retry
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later", are caught."""
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tries = 0
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nntp = value = None
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while tries < 5:
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tries += 1
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try:
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nntp = nntplib.NNTP(nntpserver)
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except nntplib.error_perm:
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value = sys.exc_info()[1]
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if re.compile("^50[45]").search(str(value)):
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time.sleep(random.randrange(10, 30))
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else:
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raise
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if nntp is None:
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raise linkcheck.LinkCheckerError(
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_("NTTP server too busy; tried more than %d times")%tries)
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if value is not None:
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self.add_warning(_("NNTP busy: %s")%str(value))
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return nntp
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def get_cache_keys (self):
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return [self.url]
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def can_get_content (self):
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return False
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