mirror of
https://github.com/Mikaela/Limnoria.git
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b42b06fe79
When the feed has a specified encoding, we'll be dealing with unicode objects
in the response from feedparser.parse(). To avoid possible UnicodeErrors, we
need to encode() before handing the string off to other functions, so the
other functions are always dealing with bytestrings instead of bytestrings and
unicode objects. Mixing unicode and bytestrings will cause implicit
conversions of the unicode objects, which will most likely use the wrong
encoding.
Signed-off-by: James McCoy <jamessan@users.sourceforge.net>
(cherry picked from commit 964c73f591)
Signed-off-by: Daniel Folkinshteyn <nanotube@users.sourceforge.net>
472 lines
20 KiB
Python
472 lines
20 KiB
Python
###
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# Copyright (c) 2002-2004, Jeremiah Fincher
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# Copyright (c) 2008-2010, James Vega
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions, and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions, and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the author of this software nor the name of
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# contributors to this software may be used to endorse or promote products
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# derived from this software without specific prior written consent.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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###
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import new
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import time
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import socket
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import sgmllib
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import threading
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import supybot.conf as conf
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import supybot.utils as utils
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import supybot.world as world
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from supybot.commands import *
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import supybot.ircutils as ircutils
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import supybot.registry as registry
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import supybot.callbacks as callbacks
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try:
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feedparser = utils.python.universalImport('feedparser', 'local.feedparser')
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except ImportError:
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raise callbacks.Error, \
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'You the feedparser module installed to use this plugin. ' \
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'Download the module at <http://feedparser.org/>.'
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def getFeedName(irc, msg, args, state):
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if not registry.isValidRegistryName(args[0]):
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state.errorInvalid('feed name', args[0],
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'Feed names must not include spaces.')
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state.args.append(callbacks.canonicalName(args.pop(0)))
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addConverter('feedName', getFeedName)
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class RSS(callbacks.Plugin):
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"""This plugin is useful both for announcing updates to RSS feeds in a
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channel, and for retrieving the headlines of RSS feeds via command. Use
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the "add" command to add feeds to this plugin, and use the "announce"
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command to determine what feeds should be announced in a given channel."""
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threaded = True
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def __init__(self, irc):
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self.__parent = super(RSS, self)
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self.__parent.__init__(irc)
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# Schema is feed : [url, command]
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self.feedNames = callbacks.CanonicalNameDict()
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self.locks = {}
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self.lastRequest = {}
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self.cachedFeeds = {}
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self.gettingLockLock = threading.Lock()
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for name in self.registryValue('feeds'):
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self._registerFeed(name)
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try:
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url = self.registryValue(registry.join(['feeds', name]))
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except registry.NonExistentRegistryEntry:
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self.log.warning('%s is not a registered feed, removing.',name)
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continue
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self.makeFeedCommand(name, url)
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self.getFeed(url) # So announced feeds don't announce on startup.
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def isCommandMethod(self, name):
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if not self.__parent.isCommandMethod(name):
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if name in self.feedNames:
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return True
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else:
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return False
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else:
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return True
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def listCommands(self):
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return self.__parent.listCommands(self.feedNames.keys())
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def getCommandMethod(self, command):
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try:
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return self.__parent.getCommandMethod(command)
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except AttributeError:
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return self.feedNames[command[0]][1]
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def _registerFeed(self, name, url=''):
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self.registryValue('feeds').add(name)
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group = self.registryValue('feeds', value=False)
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conf.registerGlobalValue(group, name, registry.String(url, ''))
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def __call__(self, irc, msg):
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self.__parent.__call__(irc, msg)
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irc = callbacks.SimpleProxy(irc, msg)
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newFeeds = {}
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for channel in irc.state.channels:
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feeds = self.registryValue('announce', channel)
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for name in feeds:
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commandName = callbacks.canonicalName(name)
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if self.isCommandMethod(commandName):
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url = self.feedNames[commandName][0]
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else:
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url = name
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if self.willGetNewFeed(url):
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newFeeds.setdefault((url, name), []).append(channel)
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for ((url, name), channels) in newFeeds.iteritems():
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# We check if we can acquire the lock right here because if we
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# don't, we'll possibly end up spawning a lot of threads to get
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# the feed, because this thread may run for a number of bytecodes
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# before it switches to a thread that'll get the lock in
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# _newHeadlines.
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if self.acquireLock(url, blocking=False):
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try:
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t = threading.Thread(target=self._newHeadlines,
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name=format('Fetching %u', url),
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args=(irc, channels, name, url))
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self.log.info('Checking for announcements at %u', url)
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world.threadsSpawned += 1
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t.setDaemon(True)
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t.start()
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finally:
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self.releaseLock(url)
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time.sleep(0.1) # So other threads can run.
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def buildHeadlines(self, headlines, channel, config='announce.showLinks'):
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newheadlines = []
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if self.registryValue(config, channel):
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for headline in headlines:
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if headline[1]:
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newheadlines.append(format('%s %u',
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headline[0],
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headline[1].encode('utf-8')))
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else:
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newheadlines.append(format('%s', headline[0]))
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else:
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for headline in headlines:
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newheadlines = [format('%s', h[0]) for h in headlines]
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return newheadlines
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def _newHeadlines(self, irc, channels, name, url):
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try:
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# We acquire the lock here so there's only one announcement thread
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# in this code at any given time. Otherwise, several announcement
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# threads will getFeed (all blocking, in turn); then they'll all
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# want to send their news messages to the appropriate channels.
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# Note that we're allowed to acquire this lock twice within the
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# same thread because it's an RLock and not just a normal Lock.
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self.acquireLock(url)
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try:
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oldresults = self.cachedFeeds[url]
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oldheadlines = self.getHeadlines(oldresults)
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except KeyError:
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oldheadlines = []
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newresults = self.getFeed(url)
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newheadlines = self.getHeadlines(newresults)
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if len(newheadlines) == 1:
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s = newheadlines[0][0]
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if s in ('Timeout downloading feed.',
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'Unable to download feed.'):
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self.log.debug('%s %u', s, url)
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return
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def normalize(headline):
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return (tuple(headline[0].lower().split()), headline[1])
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oldheadlines = set(map(normalize, oldheadlines))
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for (i, headline) in enumerate(newheadlines):
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if normalize(headline) in oldheadlines:
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newheadlines[i] = None
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newheadlines = filter(None, newheadlines) # Removes Nones.
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if newheadlines:
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def filter_whitelist(headline):
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v = False
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for kw in whitelist:
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if kw in headline[0] or kw in headline[1]:
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v = True
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break
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return v
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def filter_blacklist(headline):
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v = True
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for kw in blacklist:
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if kw in headline[0] or kw in headline[1]:
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v = False
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break
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return v
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for channel in channels:
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if len(oldheadlines) == 0:
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channelnewheadlines = newheadlines[:self.registryValue('initialAnnounceHeadlines', channel)]
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else:
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channelnewheadlines = newheadlines[:]
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whitelist = self.registryValue('keywordWhitelist', channel)
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blacklist = self.registryValue('keywordBlacklist', channel)
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if len(whitelist) != 0:
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channelnewheadlines = filter(filter_whitelist, channelnewheadlines)
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if len(blacklist) != 0:
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channelnewheadlines = filter(filter_blacklist, channelnewheadlines)
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if len(channelnewheadlines) == 0:
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return
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bold = self.registryValue('bold', channel)
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sep = self.registryValue('headlineSeparator', channel)
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prefix = self.registryValue('announcementPrefix', channel)
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pre = format('%s%s: ', prefix, name)
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if bold:
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pre = ircutils.bold(pre)
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sep = ircutils.bold(sep)
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headlines = self.buildHeadlines(channelnewheadlines, channel)
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irc.replies(headlines, prefixer=pre, joiner=sep,
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to=channel, prefixNick=False, private=True)
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finally:
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self.releaseLock(url)
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def willGetNewFeed(self, url):
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now = time.time()
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wait = self.registryValue('waitPeriod')
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if url not in self.lastRequest or now - self.lastRequest[url] > wait:
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return True
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else:
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return False
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def acquireLock(self, url, blocking=True):
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try:
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self.gettingLockLock.acquire()
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try:
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lock = self.locks[url]
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except KeyError:
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lock = threading.RLock()
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self.locks[url] = lock
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return lock.acquire(blocking=blocking)
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finally:
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self.gettingLockLock.release()
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def releaseLock(self, url):
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self.locks[url].release()
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def getFeed(self, url):
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def error(s):
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return {'items': [{'title': s}]}
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try:
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# This is the most obvious place to acquire the lock, because a
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# malicious user could conceivably flood the bot with rss commands
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# and DoS the website in question.
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self.acquireLock(url)
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if self.willGetNewFeed(url):
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try:
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self.log.debug('Downloading new feed from %u', url)
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results = feedparser.parse(url)
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if 'bozo_exception' in results:
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raise results['bozo_exception']
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except sgmllib.SGMLParseError:
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self.log.exception('Uncaught exception from feedparser:')
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raise callbacks.Error, 'Invalid (unparsable) RSS feed.'
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except socket.timeout:
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return error('Timeout downloading feed.')
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except Exception, e:
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# These seem mostly harmless. We'll need reports of a
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# kind that isn't.
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self.log.debug('Allowing bozo_exception %r through.', e)
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if results.get('feed', {}):
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self.cachedFeeds[url] = results
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self.lastRequest[url] = time.time()
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else:
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self.log.debug('Not caching results; feed is empty.')
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try:
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return self.cachedFeeds[url]
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except KeyError:
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wait = self.registryValue('waitPeriod')
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# If there's a problem retrieving the feed, we should back off
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# for a little bit before retrying so that there is time for
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# the error to be resolved.
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self.lastRequest[url] = time.time() - .5 * wait
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return error('Unable to download feed.')
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finally:
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self.releaseLock(url)
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def _getConverter(self, feed):
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toText = utils.web.htmlToText
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if 'encoding' in feed:
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def conv(s):
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# encode() first so there implicit encoding doesn't happen in
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# other functions when unicode and bytestring objects are used
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# together
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s = s.encode(feed['encoding'], 'replace')
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s = toText(s).strip()
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return s
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return conv
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else:
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return lambda s: toText(s).strip()
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def getHeadlines(self, feed):
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headlines = []
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conv = self._getConverter(feed)
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for d in feed['items']:
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if 'title' in d:
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title = conv(d['title'])
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link = d.get('link')
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if link:
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headlines.append((title, link))
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else:
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headlines.append((title, None))
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return headlines
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def makeFeedCommand(self, name, url):
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docstring = format("""[<number of headlines>]
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Reports the titles for %s at the RSS feed %u. If
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<number of headlines> is given, returns only that many headlines.
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RSS feeds are only looked up every supybot.plugins.RSS.waitPeriod
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seconds, which defaults to 1800 (30 minutes) since that's what most
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websites prefer.
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""", name, url)
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if url not in self.locks:
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self.locks[url] = threading.RLock()
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if self.isCommandMethod(name):
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s = format('I already have a command in this plugin named %s.',name)
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raise callbacks.Error, s
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def f(self, irc, msg, args):
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args.insert(0, url)
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self.rss(irc, msg, args)
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f = utils.python.changeFunctionName(f, name, docstring)
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f = new.instancemethod(f, self, RSS)
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self.feedNames[name] = (url, f)
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self._registerFeed(name, url)
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def add(self, irc, msg, args, name, url):
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"""<name> <url>
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Adds a command to this plugin that will look up the RSS feed at the
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given URL.
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"""
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self.makeFeedCommand(name, url)
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irc.replySuccess()
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add = wrap(add, ['feedName', 'url'])
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def remove(self, irc, msg, args, name):
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"""<name>
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Removes the command for looking up RSS feeds at <name> from
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this plugin.
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"""
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if name not in self.feedNames:
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irc.error('That\'s not a valid RSS feed command name.')
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return
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del self.feedNames[name]
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conf.supybot.plugins.RSS.feeds().remove(name)
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conf.supybot.plugins.RSS.feeds.unregister(name)
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irc.replySuccess()
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remove = wrap(remove, ['feedName'])
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class announce(callbacks.Commands):
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def list(self, irc, msg, args, channel):
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"""[<channel>]
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Returns the list of feeds announced in <channel>. <channel> is
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only necessary if the message isn't sent in the channel itself.
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"""
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announce = conf.supybot.plugins.RSS.announce
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feeds = format('%L', list(announce.get(channel)()))
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irc.reply(feeds or 'I am currently not announcing any feeds.')
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list = wrap(list, ['channel',])
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def add(self, irc, msg, args, channel, feeds):
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"""[<channel>] <name|url> [<name|url> ...]
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Adds the list of feeds to the current list of announced feeds in
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<channel>. Valid feeds include the names of registered feeds as
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well as URLs for RSS feeds. <channel> is only necessary if the
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message isn't sent in the channel itself.
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"""
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announce = conf.supybot.plugins.RSS.announce
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S = announce.get(channel)()
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for feed in feeds:
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S.add(feed)
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announce.get(channel).setValue(S)
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irc.replySuccess()
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add = wrap(add, [('checkChannelCapability', 'op'),
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many(first('url', 'feedName'))])
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def remove(self, irc, msg, args, channel, feeds):
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"""[<channel>] <name|url> [<name|url> ...]
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Removes the list of feeds from the current list of announced feeds
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in <channel>. Valid feeds include the names of registered feeds as
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well as URLs for RSS feeds. <channel> is only necessary if the
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message isn't sent in the channel itself.
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"""
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announce = conf.supybot.plugins.RSS.announce
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S = announce.get(channel)()
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for feed in feeds:
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S.discard(feed)
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announce.get(channel).setValue(S)
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irc.replySuccess()
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remove = wrap(remove, [('checkChannelCapability', 'op'),
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many(first('url', 'feedName'))])
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def rss(self, irc, msg, args, url, n):
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"""<url> [<number of headlines>]
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Gets the title components of the given RSS feed.
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If <number of headlines> is given, return only that many headlines.
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"""
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self.log.debug('Fetching %u', url)
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feed = self.getFeed(url)
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if irc.isChannel(msg.args[0]):
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channel = msg.args[0]
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else:
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channel = None
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headlines = self.getHeadlines(feed)
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if not headlines:
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irc.error('Couldn\'t get RSS feed.')
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return
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headlines = self.buildHeadlines(headlines, channel, 'showLinks')
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if n:
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headlines = headlines[:n]
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else:
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headlines = headlines[:self.registryValue('defaultNumberOfHeadlines')]
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sep = self.registryValue('headlineSeparator', channel)
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if self.registryValue('bold', channel):
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sep = ircutils.bold(sep)
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irc.replies(headlines, joiner=sep)
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rss = wrap(rss, ['url', additional('int')])
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def info(self, irc, msg, args, url):
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"""<url|feed>
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Returns information from the given RSS feed, namely the title,
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URL, description, and last update date, if available.
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"""
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try:
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url = self.registryValue('feeds.%s' % url)
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except registry.NonExistentRegistryEntry:
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pass
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feed = self.getFeed(url)
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conv = self._getConverter(feed)
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info = feed.get('feed')
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if not info:
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irc.error('I couldn\'t retrieve that RSS feed.')
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return
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# check the 'modified_parsed' key, if it's there, convert it here first
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if 'modified' in info:
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seconds = time.mktime(info['modified_parsed'])
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now = time.mktime(time.gmtime())
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when = utils.timeElapsed(now - seconds) + ' ago'
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else:
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when = 'time unavailable'
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title = conv(info.get('title', 'unavailable'))
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desc = conv(info.get('description', 'unavailable'))
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link = conv(info.get('link', 'unavailable'))
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# The rest of the entries are all available in the channel key
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response = format('Title: %s; URL: %u; '
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'Description: %s; Last updated: %s.',
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title, link, desc, when)
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irc.reply(utils.str.normalizeWhitespace(response))
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info = wrap(info, [first('url', 'feedName')])
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Class = RSS
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# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79:
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