Source code for linkcheck.director.checker

# Copyright (C) 2006-2014 Bastian Kleineidam
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
URL checking functions.
"""
import copy
import time
from . import task
from ..cache import urlqueue
from .. import parser

# Interval in which each check thread looks if it's stopped.
QUEUE_POLL_INTERVALL_SECS = 1.0


[docs]def check_urls(urlqueue, logger): """Check URLs without threading.""" while not urlqueue.empty(): url_data = urlqueue.get() try: check_url(url_data, logger) finally: urlqueue.task_done(url_data)
[docs]def check_url(url_data, logger): """Check a single URL with logging.""" if url_data.has_result: logger.log_url(url_data.to_wire()) else: cache = url_data.aggregate.result_cache key = url_data.cache_url result = cache.get_result(key) if result is None: # check check_start = time.time() try: url_data.check() do_parse = url_data.check_content() url_data.checktime = time.time() - check_start # Add result to cache result = url_data.to_wire() cache.add_result(key, result) for alias in url_data.aliases: # redirect aliases cache.add_result(alias, result) # parse content recursively # XXX this could add new warnings which should be cached. if do_parse: parser.parse_url(url_data) finally: # close/release possible open connection url_data.close_connection() else: # copy data from cache and adjust it result = copy.copy(result) result.parent_url = url_data.parent_url result.base_ref = url_data.base_ref or "" result.base_url = url_data.base_url or "" result.line = url_data.line result.column = url_data.column result.level = url_data.recursion_level result.name = url_data.name logger.log_url(result)
[docs]class Checker(task.LoggedCheckedTask): """URL check thread.""" def __init__(self, urlqueue, logger, add_request_session): """Store URL queue and logger.""" super().__init__(logger) self.urlqueue = urlqueue self.origname = self.getName() self.add_request_session = add_request_session
[docs] def run_checked(self): """Check URLs in the queue.""" # construct per-thread HTTP/S requests session self.add_request_session() while not self.stopped(0): self.check_url()
[docs] def check_url(self): """Try to get URL data from queue and check it.""" try: url_data = self.urlqueue.get(timeout=QUEUE_POLL_INTERVALL_SECS) if url_data is not None: try: self.check_url_data(url_data) finally: self.urlqueue.task_done(url_data) self.name = self.origname except urlqueue.Empty: pass except Exception: self.internal_error()
[docs] def check_url_data(self, url_data): """Check one URL data instance.""" self.name = "CheckThread-%s" % (url_data.url or "") check_url(url_data, self.logger)