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tornado_fetcher.py
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#!/usr/bin/env python
# -*- encoding: utf-8 -*-
# vim: set et sw=4 ts=4 sts=4 ff=unix fenc=utf8:
# Author: Binux<[email protected]>
# http://binux.me
# Created on 2012-12-17 11:07:19
import time
import Queue
import logging
import threading
import cookie_utils
import tornado.ioloop
import tornado.httputil
import tornado.httpclient
from tornado.curl_httpclient import CurlAsyncHTTPClient
from tornado.simple_httpclient import SimpleAsyncHTTPClient
from libs import dataurl, counter
logger = logging.getLogger('fetcher')
class MyCurlAsyncHTTPClient(CurlAsyncHTTPClient):
def free_size(self):
return len(self._free_list)
def size(self):
return len(self._curls) - self.free_size()
class MySimpleAsyncHTTPClient(SimpleAsyncHTTPClient):
def free_size(self):
return self.max_clients - self.size()
def size(self):
return len(self.active)
fetcher_output = {
"status_code": int,
"orig_url": str,
"url": str,
"headers": dict,
"content": str,
"cookies": dict,
}
class Fetcher(object):
user_agent = "BaiDuSpider"
default_options = {
'method': 'GET',
'headers': {},
'timeout': 120,
}
allowed_options = ['method', 'headers', 'data', 'timeout', 'allow_redirects', 'cookies', ]
def __init__(self, inqueue, outqueue, poolsize=10, proxy=None, async=True):
self.inqueue = inqueue
self.outqueue = outqueue
self.poolsize = poolsize
self._running = False
self._quit = False
self.proxy = proxy
self.async = async
if async:
self.http_client = MyCurlAsyncHTTPClient(max_clients=self.poolsize)
else:
self.http_client = tornado.httpclient.HTTPClient(MyCurlAsyncHTTPClient, max_clients=self.poolsize)
self._cnt = {
'5m': counter.CounterManager(
lambda : counter.TimebaseAverageWindowCounter(30, 10)),
'1h': counter.CounterManager(
lambda : counter.TimebaseAverageWindowCounter(60, 60)),
}
def send_result(self, type, task, result):
"""type in ('data', 'http')"""
if self.outqueue:
try:
self.outqueue.put((task, result))
except Exception, e:
logger.exception(e)
def fetch(self, task, callback=None):
url = task.get('url', 'data:,')
if callback is None:
callback = self.send_result
if url.startswith('data:'):
return self.data_fetch(url, task, callback)
else:
return self.http_fetch(url, task, callback)
def sync_fetch(self, task):
wait_result = threading.Condition()
_result = {}
def callback(type, task, result):
wait_result.acquire()
_result['type'] = type
_result['task'] = task
_result['result'] = result
wait_result.notify()
wait_result.release()
self.fetch(task, callback=callback)
wait_result.acquire()
while 'result' not in _result:
wait_result.wait()
wait_result.release()
return _result['result']
def data_fetch(self, url, task, callback):
self.on_fetch('data', task)
result = {}
result['orig_url'] = url
result['content'] = dataurl.decode(url)
result['status_code'] = 200
result['url'] = url
result['time'] = 0
if len(result['content']) < 70:
logger.info("[200] %s 0s" % url)
else:
logger.info("[200] data:,%s...[content:%d] 0s" % (result['content'][:70], len(result['content'])))
callback('data', task, result)
self.on_result('data', task, result)
return task, result
def http_fetch(self, url, task, callback):
self.on_fetch('http', task)
fetch = dict(self.default_options)
fetch.setdefault('url', url)
fetch.setdefault('headers', {})
fetch.setdefault('allow_redirects', True)
fetch.setdefault('use_gzip', True)
fetch['headers'].setdefault('User-Agent', self.user_agent)
task_fetch = task.get('fetch', {})
for each in self.allowed_options:
if each in task_fetch:
fetch[each] = task_fetch[each]
track_headers = task.get('track', {}).get('fetch', {}).get('headers', {})
#proxy
if self.proxy and task_fetch.get('proxy', True):
fetch['proxy_host'] = self.proxy['http'].split(":")[0]
fetch['proxy_port'] = int(self.proxy['http'].split(":")[1])
#etag
if task_fetch.get('etag', True):
_t = task_fetch.get('etag') if isinstance(task_fetch.get('etag'), basestring) \
else track_headers.get('etag')
if _t:
fetch['headers'].setdefault('If-None-Match', _t)
#last modifed
if task_fetch.get('last_modified', True):
_t = task_fetch.get('last_modifed') \
if isinstance(task_fetch.get('last_modifed'), basestring) \
else track_headers.get('last-modified')
if _t:
fetch['headers'].setdefault('If-Modifed-Since', _t)
#fix for tornado request obj
cookie = None
if 'allow_redirects' in fetch:
fetch['follow_redirects'] = fetch['allow_redirects']
del fetch['allow_redirects']
if 'timeout' in fetch:
fetch['connect_timeout'] = fetch['timeout']
fetch['request_timeout'] = fetch['timeout']
del fetch['timeout']
if 'data' in fetch:
fetch['body'] = fetch['data']
del fetch['data']
if 'cookies' in fetch:
cookie = fetch['cookies']
del fetch['cookies']
def handle_response(response):
response.headers = final_headers
session.extract_cookies_to_jar(request, cookie_headers)
if response.error and not isinstance(response.error, tornado.httpclient.HTTPError):
result = {'status_code': 599, 'error': "%r" % response.error,
'time': time.time() - start_time, 'orig_url': url, 'url': url, }
callback('http', task, result)
self.on_result('http', task, result)
return task, result
result = {}
result['orig_url'] = url
result['content'] = response.body or ''
result['headers'] = dict(response.headers)
result['status_code'] = response.code
result['url'] = response.effective_url or url
result['cookies'] = session.to_dict()
result['time'] = time.time() - start_time
result['save'] = task_fetch.get('save')
if 200 <= response.code < 300:
logger.info("[%d] %s %.2fs" % (response.code, url, result['time']))
else:
logger.warning("[%d] %s %.2fs" % (response.code, url, result['time']))
callback('http', task, result)
self.on_result('http', task, result)
return task, result
def header_callback(line):
line = line.strip()
if line.startswith("HTTP/"):
final_headers.clear()
return
if not line:
return
final_headers.parse_line(line)
cookie_headers.parse_line(line)
start_time = time.time()
session = cookie_utils.CookieSession()
cookie_headers = tornado.httputil.HTTPHeaders()
final_headers = tornado.httputil.HTTPHeaders()
try:
request = tornado.httpclient.HTTPRequest(header_callback=header_callback, **fetch)
if cookie:
session.update(cookie)
request.headers.add('Cookie', self.session.get_cookie_header(request))
if self.async:
response = self.http_client.fetch(request, handle_response)
else:
return handle_response(self.http_client.fetch(request))
except Exception, e:
result = {'status_code': 599, 'error': "%r" % e, 'time': time.time() - start_time,
'orig_url': url, 'url': url, }
logger.error("[599] %s, %r %.2fs" % (url, e, result['time']))
callback('http', task, result)
self.on_result('http', task, result)
return task, result
def run(self):
def queue_loop():
if not self.outqueue or not self.inqueue:
return
while not self._quit:
try:
if self.outqueue.full():
break
if self.http_client.free_size() <= 0:
break
task = self.inqueue.get_nowait()
self.fetch(task)
except Queue.Empty:
break
except KeyboardInterrupt:
break
except Exception, e:
logger.exception(e)
break
tornado.ioloop.PeriodicCallback(queue_loop, 100).start()
self._running = True
try:
tornado.ioloop.IOLoop.instance().start()
except KeyboardInterrupt:
pass
def size(self):
return self.http_client.size()
def quit(self):
self._running = False
self._quit = True
tornado.ioloop.IOLoop.instance().stop()
def xmlrpc_run(self, port=24444, bind='127.0.0.1', logRequests=False):
from SimpleXMLRPCServer import SimpleXMLRPCServer
from xmlrpclib import Binary
import cPickle as pickle
server = SimpleXMLRPCServer((bind, port), allow_none=True, logRequests=logRequests)
server.register_introspection_functions()
server.register_multicall_functions()
server.register_function(self.quit, '_quit')
server.register_function(self.size)
def sync_fetch(task):
result = self.sync_fetch(task)
result = Binary(pickle.dumps(result))
return result
server.register_function(sync_fetch, 'fetch')
def dump_counter(_time, _type):
return self._cnt[_time].to_dict(_type)
server.register_function(dump_counter, 'counter')
server.serve_forever()
def on_fetch(self, type, task):
"""type in ('data', 'http')"""
pass
def on_result(self, type, task, result):
"""type in ('data', 'http')"""
status_code = result.get('status_code', 599)
if status_code != 599:
status_code = (int(status_code) / 100 * 100)
self._cnt['5m'].event((task.get('project'), status_code), +1)
self._cnt['1h'].event((task.get('project'), status_code), +1)
if type == 'http' and result.get('time'):
content_len = len(result.get('content', ''))
self._cnt['5m'].event((task.get('project'), 'speed'), float(content_len)/result.get('time'))
self._cnt['1h'].event((task.get('project'), 'speed'), float(content_len)/result.get('time'))
self._cnt['5m'].event((task.get('project'), 'time'), result.get('time'))
self._cnt['1h'].event((task.get('project'), 'time'), result.get('time'))