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demo.py
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demo.py
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#!/usr/bin/python
import httplib
import socks
import urllib2
from Queue import Queue
from threading import Thread, Condition, Lock
from threading import active_count as threading_active_count
import time
from pymongo import Connection
import pymongo
url_format = 'http://www.imdb.com/user/ur{0}/ratings'
http_codes_counter = {}
MONGODB_HOSTNAME = '192.168.0.118'
"""
https://gist.github.com/869791
SocksiPy + urllib handler
version: 0.2
author: e
This module provides a Handler which you can use with urllib2 to allow it to tunnel your connection through a socks.sockssocket socket, without monkey patching the original socket...
"""
class SocksiPyConnection(httplib.HTTPConnection):
def __init__(self, proxytype, proxyaddr, proxyport = None, rdns = True, username = None, password = None, *args, **kwargs):
self.proxyargs = (proxytype, proxyaddr, proxyport, rdns, username, password)
httplib.HTTPConnection.__init__(self, *args, **kwargs)
def connect(self):
self.sock = socks.socksocket()
self.sock.setproxy(*self.proxyargs)
if isinstance(self.timeout, float):
self.sock.settimeout(self.timeout)
self.sock.connect((self.host, self.port))
class SocksiPyHandler(urllib2.HTTPHandler):
def __init__(self, *args, **kwargs):
self.args = args
self.kw = kwargs
urllib2.HTTPHandler.__init__(self)
def http_open(self, req):
def build(host, port=None, strict=None, timeout=0):
conn = SocksiPyConnection(*self.args, host=host, port=port, strict=strict, timeout=timeout, **self.kw)
return conn
return self.do_open(build, req)
class Monitor(Thread):
def __init__(self, queue, discovery):
Thread.__init__(self)
self.queue = queue
self.discovery = discovery
self.finish_signal = False
def finish(self):
self.finish_signal = True
def run(self):
while not self.finish_signal:
time.sleep(5)
print "Elements in Queue:", self.queue.qsize(), "Active Threads:", threading_active_count(), "Exceptions Counter:", self.discovery.exception_counter
class Worker(Thread):
def __init__(self, queue, discovery, socks_proxy_port):
Thread.__init__(self)
self.queue = queue
self.discovery = discovery
self.socks_proxy_port = socks_proxy_port
self.opener = urllib2.build_opener(SocksiPyHandler(socks.PROXY_TYPE_SOCKS4, 'localhost', self.socks_proxy_port))
self.conn = Connection(MONGODB_HOSTNAME, 27017)
self.db = self.conn.scraping
self.coll = self.db.imdb.ratings
def get_url(self, url):
try:
#h = urllib2.urlopen(url)
h = self.opener.open(url)
return h.getcode()
except urllib2.URLError, e:
return e.code
def run(self):
while True:
try:
index = self.queue.get()
if index == None:
self.queue.put(None) # Notify the next worker
break
url = url_format.format(index)
code = self.get_url(url)
self.coll.update({'index':index}, {'$set': {'last_response':code}})
self.discovery.lock.acquire()
self.discovery.records_to_process -= 1
if self.discovery.records_to_process == 0:
self.discovery.lock.notify()
self.discovery.lock.release()
except (socks.Socks4Error, httplib.BadStatusLine), e:
# TypeError: 'Socks4Error' object is not callable
print e
self.discovery.exception_counter_lock.acquire()
self.discovery.exception_counter += 1
self.discovery.exception_counter_lock.release()
pass # leave this element for the next cycle
time.sleep(1.5)
class Croupier(Thread):
Base = 0
Top = 25000000
#Top = 1000
def __init__(self, queue, discovery):
Thread.__init__(self)
self.conn = Connection(MONGODB_HOSTNAME, 27017)
self.db = self.conn.scraping
self.coll = self.db.imdb.ratings
self.finish_signal = False
self.queue = queue
self.discovery = discovery
self.discovery.records_to_process = 0
def run(self):
# Look if imdb collection is empty. Only if its empty we create all the items
c = self.coll.count()
if c == 0:
print "Inserting items"
self.coll.ensure_index([('index', pymongo.ASCENDING), ('last_response', pymongo.ASCENDING)])
for i in xrange(Croupier.Base, Croupier.Top):
self.coll.insert({'index':i, 'url': url_format.format(i), 'last_response': 0})
else:
print "Using #", c, " persisted items"
while True:
#items = self.coll.find({'last_response': {'$ne': 200}})
items = self.coll.find({'$and': [{'last_response': {'$ne': 200}}, {'last_response' : {'$ne': 404}}]}, timeout = False)
self.discovery.records_to_process = items.count()
if self.discovery.records_to_process == 0:
break
for item in items:
self.queue.put(item['index'])
# Wait until the last item is updated on the db
self.discovery.lock.acquire()
while self.discovery.records_to_process != 0:
self.discovery.lock.wait()
self.discovery.lock.release()
# time.sleep(5)
# Send a 'signal' to workers to finish
self.queue.put(None)
def finish(self):
self.finish_signal = True
class Discovery:
NWorkers = 71
SocksProxyBasePort = 9050
Contention = 10000
def __init__(self):
self.queue = Queue(Discovery.Contention)
self.workers = []
self.lock = Condition()
self.exception_counter_lock = Lock()
self.records_to_process = 0
self.exception_counter = 0
def start(self):
croupier = Croupier(self.queue, self)
croupier.start()
for i in range(Discovery.NWorkers):
worker = Worker(self.queue, self, Discovery.SocksProxyBasePort + i)
self.workers.append(worker)
for w in self.workers:
w.start()
monitor = Monitor(self.queue, self)
monitor.start()
for w in self.workers:
w.join()
croupier.join()
print "Queue finished with:", self.queue.qsize(), "elements"
monitor.finish()
def main():
discovery = Discovery()
discovery.start()
if __name__ == '__main__':
main()
#
# MISC NOTES
#
# - How many IMDB ratings pages are currently indexed by Google? query: inurl:www.imdb.com/user/*/ratings
# - [pymongo] cursor id '239432858681488351' not valid at server Options: http://groups.google.com/group/mongodb-user/browse_thread/thread/4ed6e3d77fb1c2cf?pli=1
# That error generally means that the cursor timed out on the server -
# this could be the case if you are performing a long running operation
# while iterating over the cursor. The best bet is probably to turn off
# the timeout by passing "timeout=False" in your call to find:
#