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#!/usr/bin/env python
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
# SvnTweet - Subscribe to a SvnPubSub stream, and Twitter about it!
#
# Example:
# svntweet.py my-config.json
#
# With my-config.json containing stream paths and the twitter auth info:
# {"stream": "http://svn.apache.org:2069/commits",
# "username": "asfcommits",
# "password": "MyLuggageComboIs1234"}
#
#
#
import threading
import sys
import os
try:
import simplejson as json
except ImportError:
import json
from twisted.internet import defer, reactor, task, threads
from twisted.python import failure, log
from twisted.web.client import HTTPClientFactory, HTTPPageDownloader
from urlparse import urlparse
import time
import posixpath
sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), "twitty-twister", "lib"))
try:
import twitter
except:
print "Get a copy of twitty-twister from <http://github.com/dustin/twitty-twister>"
sys.exit(-1)
class Config(object):
def __init__(self, path):
self.path = path
self.mtime_path = 0
self.config = {}
self._load_config()
def _load_config(self):
mtime = os.path.getmtime(self.path)
if mtime != self.mtime_path:
fp = open(self.path, "rb")
self.mtime_path = mtime
self.config = json.loads(fp.read())
class HTTPStream(HTTPClientFactory):
protocol = HTTPPageDownloader
def __init__(self, url):
HTTPClientFactory.__init__(self, url, method="GET", agent="SvnTweet/0.1.0")
def pageStart(self, partial):
pass
def pagePart(self, data):
pass
def pageEnd(self):
pass
class Commit(object):
def __init__(self, commit):
self.__dict__.update(commit)
class JSONRecordHandler:
def __init__(self, bdec):
self.bdec = bdec
def feed(self, record):
obj = json.loads(record)
if 'svnpubsub' in obj:
actual_version = obj['svnpubsub'].get('version')
EXPECTED_VERSION = 1
if actual_version != EXPECTED_VERSION:
raise ValueException("Unknown svnpubsub format: %r != %d"
% (actual_format, expected_format))
elif 'commit' in obj:
commit = Commit(obj['commit'])
if not hasattr(commit, 'type'):
raise ValueException("Commit object is missing type field.")
if not hasattr(commit, 'format'):
raise ValueException("Commit object is missing format field.")
if commit.type != 'svn' and commit.format != 1:
raise ValueException("Unexpected type and/or format: %s:%s"
% (commit.type, commit.format))
self.bdec.commit(commit)
elif 'stillalive' in obj:
self.bdec.stillalive()
class JSONHTTPStream(HTTPStream):
def __init__(self, url, bdec):
HTTPStream.__init__(self, url)
self.bdec = bdec
self.ibuffer = []
self.parser = JSONRecordHandler(bdec)
def pageStart(self, partial):
self.bdec.pageStart()
def pagePart(self, data):
eor = data.find("\0")
if eor >= 0:
self.ibuffer.append(data[0:eor])
self.parser.feed(''.join(self.ibuffer))
self.ibuffer = [data[eor+1:]]
else:
self.ibuffer.append(data)
def connectTo(url, bdec):
u = urlparse(url)
port = u.port
if not port:
port = 80
s = JSONHTTPStream(url, bdec)
conn = reactor.connectTCP(u.hostname, u.port, s)
return [s, conn]
CHECKBEAT_TIME = 90
class BigDoEverythingClasss(object):
def __init__(self, config):
self.c = config
self.c._load_config()
self.url = str(self.c.config.get('stream'))
self.failures = 0
self.alive = time.time()
self.checker = task.LoopingCall(self._checkalive)
self.transport = None
self.stream = None
self._restartStream()
self.watch = []
self.twit = twitter.Twitter(self.c.config.get('username'), self.c.config.get('password'))
def pageStart(self):
log.msg("Stream Connection Established")
self.failures = 0
def _restartStream(self):
(self.stream, self.transport) = connectTo(self.url, self)
self.stream.deferred.addBoth(self.streamDead)
self.alive = time.time()
self.checker.start(CHECKBEAT_TIME)
def _checkalive(self):
n = time.time()
if n - self.alive > CHECKBEAT_TIME:
log.msg("Stream is dead, reconnecting")
self.transport.disconnect()
def stillalive(self):
self.alive = time.time()
def streamDead(self, v):
BACKOFF_SECS = 5
BACKOFF_MAX = 60
self.checker.stop()
self.stream = None
self.failures += 1
backoff = min(self.failures * BACKOFF_SECS, BACKOFF_MAX)
log.msg("Stream disconnected, trying again in %d seconds.... %s" % (backoff, self.url))
reactor.callLater(backoff, self._restartStream)
def _normalize_path(self, path):
if path[0] != '/':
return "/" + path
return posixpath.abspath(path)
def tweet(self, msg):
log.msg("SEND TWEET: %s" % (msg))
self.twit.update(msg).addCallback(self.tweet_done).addErrback(log.msg)
def tweet_done(self, x):
log.msg("TWEET: Success!")
def build_tweet(self, commit):
maxlen = 144
left = maxlen
paths = map(self._normalize_path, commit.changed)
if not len(paths):
return None
path = posixpath.commonprefix(paths)
if path[0:1] == '/' and len(path) > 1:
path = path[1:]
#TODO: allow URL to be configurable.
link = " - http://svn.apache.org/r%d" % (commit.id)
left -= len(link)
msg = "r%d in %s by %s: " % (commit.id, path, commit.committer)
left -= len(msg)
if left > 3:
msg += commit.log[0:left]
msg += link
return msg
def commit(self, commit):
log.msg("COMMIT r%d (%d paths)" % (commit.id, len(commit.changed)))
msg = self.build_tweet(commit)
if msg:
self.tweet(msg)
#print "Common Prefix: %s" % (pre)
def main(config_file):
c = Config(config_file)
big = BigDoEverythingClasss(c)
reactor.run()
if __name__ == "__main__":
if len(sys.argv) != 2:
print "invalid args, read source code"
sys.exit(0)
log.startLogging(sys.stdout)
main(sys.argv[1])
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