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#!/usr/bin/env python |
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# -*- encoding: utf-8 -*- |
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# vim: set et sw=4 ts=4 sts=4 ff=unix fenc=utf8: |
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# Author: Binux<[email protected]> |
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# http://binux.me |
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# Created on 2012-12-17 11:07:19 |
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from __future__ import unicode_literals |
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import six |
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import copy |
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import time |
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import json |
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import logging |
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import functools |
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import threading |
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import tornado.ioloop |
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import tornado.httputil |
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import tornado.httpclient |
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import pyspider |
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from six.moves import queue, http_cookies |
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from six.moves.urllib.robotparser import RobotFileParser |
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from requests import cookies |
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from six.moves.urllib.parse import urljoin, urlsplit |
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from tornado import gen |
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from tornado.curl_httpclient import CurlAsyncHTTPClient |
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from tornado.simple_httpclient import SimpleAsyncHTTPClient |
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from pyspider.libs import utils, dataurl, counter |
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from .cookie_utils import extract_cookies_to_jar |
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logger = logging.getLogger('fetcher') |
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class MyCurlAsyncHTTPClient(CurlAsyncHTTPClient): |
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def free_size(self): |
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return len(self._free_list) |
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def size(self): |
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return len(self._curls) - self.free_size() |
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class MySimpleAsyncHTTPClient(SimpleAsyncHTTPClient): |
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def free_size(self): |
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return self.max_clients - self.size() |
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def size(self): |
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return len(self.active) |
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fetcher_output = { |
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"status_code": int, |
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"orig_url": str, |
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"url": str, |
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"headers": dict, |
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"content": str, |
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"cookies": dict, |
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} |
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class Fetcher(object): |
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user_agent = "pyspider/%s (+http://pyspider.org/)" % pyspider.__version__ |
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default_options = { |
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'method': 'GET', |
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'headers': { |
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}, |
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'use_gzip': True, |
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'timeout': 120, |
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} |
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phantomjs_proxy = None |
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robot_txt_age = 60*60 # 1h |
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def __init__(self, inqueue, outqueue, poolsize=100, proxy=None, async=True): |
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self.inqueue = inqueue |
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self.outqueue = outqueue |
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self.poolsize = poolsize |
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self._running = False |
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self._quit = False |
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self.proxy = proxy |
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self.async = async |
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self.ioloop = tornado.ioloop.IOLoop() |
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self.robots_txt_cache = {} |
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# binding io_loop to http_client here |
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self.http_client = MyCurlAsyncHTTPClient(max_clients=self.poolsize, |
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io_loop=self.ioloop) |
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self._cnt = { |
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'5m': counter.CounterManager( |
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lambda: counter.TimebaseAverageWindowCounter(30, 10)), |
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'1h': counter.CounterManager( |
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lambda: counter.TimebaseAverageWindowCounter(60, 60)), |
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} |
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def send_result(self, type, task, result): |
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'''Send fetch result to processor''' |
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if self.outqueue: |
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try: |
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self.outqueue.put((task, result)) |
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except Exception as e: |
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logger.exception(e) |
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def fetch(self, task, callback=None): |
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if self.async: |
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return self.async_fetch(task, callback) |
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else: |
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return self.ioloop.run_sync(functools.partial(self.async_fetch, task, callback)) |
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@gen.coroutine |
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def async_fetch(self, task, callback=None): |
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'''Do one fetch''' |
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url = task.get('url', 'data:,') |
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if callback is None: |
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callback = self.send_result |
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try: |
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if url.startswith('data:'): |
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ret = yield gen.maybe_future(self.data_fetch(url, task, callback)) |
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elif task.get('fetch', {}).get('fetch_type') in ('js', 'phantomjs'): |
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ret = yield self.phantomjs_fetch(url, task, callback) |
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else: |
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ret = yield self.http_fetch(url, task, callback) |
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except Exception as e: |
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logger.exception(e) |
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raise e |
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raise gen.Return(ret) |
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def sync_fetch(self, task): |
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'''Synchronization fetch, usually used in xmlrpc thread''' |
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if not self._running: |
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return self.ioloop.run_sync(functools.partial(self.async_fetch, task, lambda t, _, r: True)) |
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wait_result = threading.Condition() |
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_result = {} |
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def callback(type, task, result): |
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wait_result.acquire() |
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_result['type'] = type |
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_result['task'] = task |
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_result['result'] = result |
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wait_result.notify() |
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wait_result.release() |
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wait_result.acquire() |
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self.fetch(task, callback=callback) |
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while 'result' not in _result: |
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wait_result.wait() |
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wait_result.release() |
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return _result['result'] |
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def data_fetch(self, url, task, callback): |
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'''A fake fetcher for dataurl''' |
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self.on_fetch('data', task) |
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result = {} |
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result['orig_url'] = url |
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result['content'] = dataurl.decode(url) |
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result['headers'] = {} |
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result['status_code'] = 200 |
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result['url'] = url |
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result['cookies'] = {} |
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result['time'] = 0 |
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result['save'] = task.get('fetch', {}).get('save') |
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if len(result['content']) < 70: |
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logger.info("[200] %s:%s %s 0s", task.get('project'), task.get('taskid'), url) |
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else: |
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logger.info( |
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"[200] %s:%s data:,%s...[content:%d] 0s", |
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task.get('project'), task.get('taskid'), |
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result['content'][:70], |
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len(result['content']) |
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) |
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callback('data', task, result) |
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self.on_result('data', task, result) |
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return task, result |
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def handle_error(self, type, url, task, start_time, callback, error): |
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result = { |
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'status_code': getattr(error, 'code', 599), |
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'error': utils.text(error), |
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'content': "", |
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'time': time.time() - start_time, |
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'orig_url': url, |
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'url': url, |
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} |
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logger.error("[%d] %s:%s %s, %r %.2fs", |
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result['status_code'], task.get('project'), task.get('taskid'), |
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url, error, result['time']) |
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callback(type, task, result) |
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self.on_result(type, task, result) |
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return task, result |
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allowed_options = ['method', 'data', 'timeout', 'cookies', 'use_gzip', 'validate_cert'] |
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def pack_tornado_request_parameters(self, url, task): |
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fetch = copy.deepcopy(self.default_options) |
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fetch['url'] = url |
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fetch['headers'] = tornado.httputil.HTTPHeaders(fetch['headers']) |
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fetch['headers']['User-Agent'] = self.user_agent |
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task_fetch = task.get('fetch', {}) |
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for each in self.allowed_options: |
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if each in task_fetch: |
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fetch[each] = task_fetch[each] |
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fetch['headers'].update(task_fetch.get('headers', {})) |
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if task.get('track'): |
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track_headers = tornado.httputil.HTTPHeaders( |
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task.get('track', {}).get('fetch', {}).get('headers') or {}) |
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track_ok = task.get('track', {}).get('process', {}).get('ok', False) |
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else: |
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track_headers = {} |
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track_ok = False |
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# proxy |
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proxy_string = None |
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if isinstance(task_fetch.get('proxy'), six.string_types): |
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proxy_string = task_fetch['proxy'] |
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elif self.proxy and task_fetch.get('proxy', True): |
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proxy_string = self.proxy |
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if proxy_string: |
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if '://' not in proxy_string: |
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proxy_string = 'http://' + proxy_string |
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proxy_splited = urlsplit(proxy_string) |
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if proxy_splited.username: |
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fetch['proxy_username'] = proxy_splited.username |
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if six.PY2: |
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fetch['proxy_username'] = fetch['proxy_username'].encode('utf8') |
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if proxy_splited.password: |
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fetch['proxy_password'] = proxy_splited.password |
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if six.PY2: |
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fetch['proxy_password'] = fetch['proxy_password'].encode('utf8') |
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fetch['proxy_host'] = proxy_splited.hostname.encode('utf8') |
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if six.PY2: |
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fetch['proxy_host'] = fetch['proxy_host'].encode('utf8') |
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fetch['proxy_port'] = proxy_splited.port or 8080 |
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# etag |
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if task_fetch.get('etag', True): |
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_t = None |
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if isinstance(task_fetch.get('etag'), six.string_types): |
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_t = task_fetch.get('etag') |
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elif track_ok: |
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_t = track_headers.get('etag') |
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if _t and 'If-None-Match' not in fetch['headers']: |
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fetch['headers']['If-None-Match'] = _t |
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# last modifed |
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if task_fetch.get('last_modified', True): |
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_t = None |
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if isinstance(task_fetch.get('last_modifed'), six.string_types): |
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_t = task_fetch.get('last_modifed') |
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elif track_ok: |
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_t = track_headers.get('last-modified') |
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if _t and 'If-Modified-Since' not in fetch['headers']: |
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fetch['headers']['If-Modified-Since'] = _t |
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# timeout |
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if 'timeout' in fetch: |
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fetch['connect_timeout'] = fetch['request_timeout'] = fetch['timeout'] |
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del fetch['timeout'] |
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# data rename to body |
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if 'data' in fetch: |
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fetch['body'] = fetch['data'] |
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del fetch['data'] |
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return fetch |
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@gen.coroutine |
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def can_fetch(self, user_agent, url): |
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parsed = urlsplit(url) |
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domain = parsed.netloc |
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if domain in self.robots_txt_cache: |
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robot_txt = self.robots_txt_cache[domain] |
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if time.time() - robot_txt.mtime() > self.robot_txt_age: |
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robot_txt = None |
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else: |
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robot_txt = None |
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if robot_txt is None: |
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robot_txt = RobotFileParser() |
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try: |
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response = yield self.http_client.fetch(urljoin(url, '/robots.txt'), |
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connect_timeout=10, request_timeout=30) |
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content = response.body |
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except tornado.httpclient.HTTPError as e: |
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logger.error('load robots.txt from %s error: %r', domain, e) |
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content = '' |
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try: |
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content = content.decode('utf8', 'ignore') |
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except UnicodeDecodeError: |
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content = '' |
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robot_txt.parse(content.splitlines()) |
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self.robots_txt_cache[domain] = robot_txt |
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raise gen.Return(robot_txt.can_fetch(user_agent, url)) |
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def clear_robot_txt_cache(self): |
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now = time.time() |
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for domain, robot_txt in self.robots_txt_cache.items(): |
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if now - robot_txt.mtime() > self.robot_txt_age: |
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del self.robots_txt_cache[domain] |
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@gen.coroutine |
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def http_fetch(self, url, task, callback): |
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'''HTTP fetcher''' |
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start_time = time.time() |
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self.on_fetch('http', task) |
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handle_error = lambda x: self.handle_error('http', url, task, start_time, callback, x) |
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# setup request parameters |
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fetch = self.pack_tornado_request_parameters(url, task) |
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task_fetch = task.get('fetch', {}) |
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session = cookies.RequestsCookieJar() |
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# fix for tornado request obj |
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if 'Cookie' in fetch['headers']: |
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c = http_cookies.SimpleCookie() |
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try: |
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c.load(fetch['headers']['Cookie']) |
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except AttributeError: |
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c.load(utils.utf8(fetch['headers']['Cookie'])) |
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for key in c: |
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session.set(key, c[key]) |
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del fetch['headers']['Cookie'] |
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if 'cookies' in fetch: |
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session.update(fetch['cookies']) |
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del fetch['cookies'] |
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max_redirects = task_fetch.get('max_redirects', 5) |
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# we will handle redirects by hand to capture cookies |
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fetch['follow_redirects'] = False |
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# making requests |
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while True: |
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# robots.txt |
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if task_fetch.get('robots_txt', False): |
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can_fetch = yield self.can_fetch(fetch['headers']['User-Agent'], fetch['url']) |
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if not can_fetch: |
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error = tornado.httpclient.HTTPError(403, 'Disallowed by robots.txt') |
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raise gen.Return(handle_error(error)) |
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try: |
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request = tornado.httpclient.HTTPRequest(**fetch) |
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cookie_header = cookies.get_cookie_header(session, request) |
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if cookie_header: |
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request.headers['Cookie'] = cookie_header |
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except Exception as e: |
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logger.exception(fetch) |
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|
raise gen.Return(handle_error(e)) |
353
|
|
|
|
354
|
|
|
try: |
355
|
|
|
response = yield self.http_client.fetch(request) |
356
|
|
|
except tornado.httpclient.HTTPError as e: |
357
|
|
|
if e.response: |
358
|
|
|
response = e.response |
359
|
|
|
else: |
360
|
|
|
raise gen.Return(handle_error(e)) |
361
|
|
|
|
362
|
|
|
extract_cookies_to_jar(session, response.request, response.headers) |
363
|
|
|
if (response.code in (301, 302, 303, 307) |
364
|
|
|
and response.headers.get('Location') |
365
|
|
|
and task_fetch.get('allow_redirects', True)): |
366
|
|
|
if max_redirects <= 0: |
367
|
|
|
error = tornado.httpclient.HTTPError( |
368
|
|
|
599, 'Maximum (%d) redirects followed' % task_fetch.get('max_redirects', 5), |
369
|
|
|
response) |
370
|
|
|
raise gen.Return(handle_error(error)) |
371
|
|
|
if response.code in (302, 303): |
372
|
|
|
fetch['method'] = 'GET' |
373
|
|
|
if 'body' in fetch: |
374
|
|
|
del fetch['body'] |
375
|
|
|
fetch['url'] = urljoin(fetch['url'], response.headers['Location']) |
376
|
|
|
fetch['request_timeout'] -= time.time() - start_time |
377
|
|
|
if fetch['request_timeout'] < 0: |
378
|
|
|
fetch['request_timeout'] = 0.1 |
379
|
|
|
fetch['connect_timeout'] = fetch['request_timeout'] |
380
|
|
|
max_redirects -= 1 |
381
|
|
|
continue |
382
|
|
|
|
383
|
|
|
result = {} |
384
|
|
|
result['orig_url'] = url |
385
|
|
|
result['content'] = response.body or '' |
386
|
|
|
result['headers'] = dict(response.headers) |
387
|
|
|
result['status_code'] = response.code |
388
|
|
|
result['url'] = response.effective_url or url |
389
|
|
|
result['cookies'] = session.get_dict() |
390
|
|
|
result['time'] = time.time() - start_time |
391
|
|
|
result['save'] = task_fetch.get('save') |
392
|
|
|
if response.error: |
393
|
|
|
result['error'] = utils.text(response.error) |
394
|
|
|
if 200 <= response.code < 300: |
395
|
|
|
logger.info("[%d] %s:%s %s %.2fs", response.code, |
396
|
|
|
task.get('project'), task.get('taskid'), |
397
|
|
|
url, result['time']) |
398
|
|
|
else: |
399
|
|
|
logger.warning("[%d] %s:%s %s %.2fs", response.code, |
400
|
|
|
task.get('project'), task.get('taskid'), |
401
|
|
|
url, result['time']) |
402
|
|
|
|
403
|
|
|
callback('http', task, result) |
404
|
|
|
self.on_result('http', task, result) |
405
|
|
|
raise gen.Return((task, result)) |
406
|
|
|
|
407
|
|
|
@gen.coroutine |
408
|
|
|
def phantomjs_fetch(self, url, task, callback): |
409
|
|
|
'''Fetch with phantomjs proxy''' |
410
|
|
|
start_time = time.time() |
411
|
|
|
|
412
|
|
|
self.on_fetch('phantomjs', task) |
413
|
|
|
handle_error = lambda x: self.handle_error('phantomjs', url, task, start_time, callback, x) |
414
|
|
|
|
415
|
|
|
# check phantomjs proxy is enabled |
416
|
|
|
if not self.phantomjs_proxy: |
417
|
|
|
result = { |
418
|
|
|
"orig_url": url, |
419
|
|
|
"content": "phantomjs is not enabled.", |
420
|
|
|
"headers": {}, |
421
|
|
|
"status_code": 501, |
422
|
|
|
"url": url, |
423
|
|
|
"cookies": {}, |
424
|
|
|
"time": 0, |
425
|
|
|
"save": task.get('fetch', {}).get('save') |
426
|
|
|
} |
427
|
|
|
logger.warning("[501] %s:%s %s 0s", task.get('project'), task.get('taskid'), url) |
428
|
|
|
callback('http', task, result) |
429
|
|
|
self.on_result('http', task, result) |
430
|
|
|
raise gen.Return((task, result)) |
431
|
|
|
|
432
|
|
|
# setup request parameters |
433
|
|
|
fetch = self.pack_tornado_request_parameters(url, task) |
434
|
|
|
task_fetch = task.get('fetch', {}) |
435
|
|
|
for each in task_fetch: |
436
|
|
|
if each not in fetch: |
437
|
|
|
fetch[each] = task_fetch[each] |
438
|
|
|
|
439
|
|
|
# robots.txt |
440
|
|
|
if task_fetch.get('robots_txt', False): |
441
|
|
|
user_agent = fetch['headers']['User-Agent'] |
442
|
|
|
can_fetch = yield self.can_fetch(user_agent, url) |
443
|
|
|
if not can_fetch: |
444
|
|
|
error = tornado.httpclient.HTTPError(403, 'Disallowed by robots.txt') |
445
|
|
|
raise gen.Return(handle_error(error)) |
446
|
|
|
|
447
|
|
|
request_conf = { |
448
|
|
|
'follow_redirects': False |
449
|
|
|
} |
450
|
|
|
if 'timeout' in task_fetch: |
451
|
|
|
request_conf['connect_timeout'] = task_fetch['timeout'] |
452
|
|
|
request_conf['request_timeout'] = task_fetch['timeout'] + 1 |
453
|
|
|
|
454
|
|
|
session = cookies.RequestsCookieJar() |
455
|
|
|
request = tornado.httpclient.HTTPRequest(url=fetch['url']) |
456
|
|
|
if fetch.get('cookies'): |
457
|
|
|
session.update(fetch['cookies']) |
458
|
|
|
if 'Cookie' in request.headers: |
459
|
|
|
del request.headers['Cookie'] |
460
|
|
|
fetch['headers']['Cookie'] = cookies.get_cookie_header(session, request) |
461
|
|
|
|
462
|
|
|
# making requests |
463
|
|
|
fetch['headers'] = dict(fetch['headers']) |
464
|
|
|
try: |
465
|
|
|
request = tornado.httpclient.HTTPRequest( |
466
|
|
|
url="%s" % self.phantomjs_proxy, method="POST", |
467
|
|
|
body=json.dumps(fetch), **request_conf) |
468
|
|
|
except Exception as e: |
469
|
|
|
raise gen.Return(handle_error(e)) |
470
|
|
|
|
471
|
|
|
try: |
472
|
|
|
response = yield self.http_client.fetch(request) |
473
|
|
|
except tornado.httpclient.HTTPError as e: |
474
|
|
|
if e.response: |
475
|
|
|
response = e.response |
476
|
|
|
|
477
|
|
|
if not response.body: |
478
|
|
|
raise gen.Return(handle_error(Exception('no response from phantomjs'))) |
479
|
|
|
|
480
|
|
|
try: |
481
|
|
|
result = json.loads(utils.text(response.body)) |
482
|
|
|
if response.error: |
483
|
|
|
result['error'] = utils.text(response.error) |
484
|
|
|
except Exception as e: |
485
|
|
|
raise gen.Return(handle_error(e)) |
486
|
|
|
|
487
|
|
|
if result.get('status_code', 200): |
488
|
|
|
logger.info("[%d] %s:%s %s %.2fs", result['status_code'], |
489
|
|
|
task.get('project'), task.get('taskid'), url, result['time']) |
490
|
|
|
else: |
491
|
|
|
logger.error("[%d] %s:%s %s, %r %.2fs", result['status_code'], |
492
|
|
|
task.get('project'), task.get('taskid'), |
493
|
|
|
url, result['content'], result['time']) |
494
|
|
|
|
495
|
|
|
callback('phantomjs', task, result) |
496
|
|
|
self.on_result('phantomjs', task, result) |
497
|
|
|
raise gen.Return((task, result)) |
498
|
|
|
|
499
|
|
|
def run(self): |
500
|
|
|
'''Run loop''' |
501
|
|
|
logger.info("fetcher starting...") |
502
|
|
|
|
503
|
|
|
def queue_loop(): |
504
|
|
|
if not self.outqueue or not self.inqueue: |
505
|
|
|
return |
506
|
|
|
while not self._quit: |
507
|
|
|
try: |
508
|
|
|
if self.outqueue.full(): |
509
|
|
|
break |
510
|
|
|
if self.http_client.free_size() <= 0: |
511
|
|
|
break |
512
|
|
|
task = self.inqueue.get_nowait() |
513
|
|
|
# FIXME: decode unicode_obj should used after data selete from |
514
|
|
|
# database, it's used here for performance |
515
|
|
|
task = utils.decode_unicode_obj(task) |
516
|
|
|
self.fetch(task) |
517
|
|
|
except queue.Empty: |
518
|
|
|
break |
519
|
|
|
except KeyboardInterrupt: |
520
|
|
|
break |
521
|
|
|
except Exception as e: |
522
|
|
|
logger.exception(e) |
523
|
|
|
break |
524
|
|
|
|
525
|
|
|
tornado.ioloop.PeriodicCallback(queue_loop, 100, io_loop=self.ioloop).start() |
526
|
|
|
tornado.ioloop.PeriodicCallback(self.clear_robot_txt_cache, 10000, io_loop=self.ioloop).start() |
527
|
|
|
self._running = True |
528
|
|
|
|
529
|
|
|
try: |
530
|
|
|
self.ioloop.start() |
531
|
|
|
except KeyboardInterrupt: |
532
|
|
|
pass |
533
|
|
|
|
534
|
|
|
logger.info("fetcher exiting...") |
535
|
|
|
|
536
|
|
|
def quit(self): |
537
|
|
|
'''Quit fetcher''' |
538
|
|
|
self._running = False |
539
|
|
|
self._quit = True |
540
|
|
|
self.ioloop.stop() |
541
|
|
|
|
542
|
|
|
def size(self): |
543
|
|
|
return self.http_client.size() |
544
|
|
|
|
545
|
|
|
def xmlrpc_run(self, port=24444, bind='127.0.0.1', logRequests=False): |
546
|
|
|
'''Run xmlrpc server''' |
547
|
|
|
import umsgpack |
548
|
|
|
try: |
549
|
|
|
from xmlrpc.server import SimpleXMLRPCServer |
550
|
|
|
from xmlrpc.client import Binary |
551
|
|
|
except ImportError: |
552
|
|
|
from SimpleXMLRPCServer import SimpleXMLRPCServer |
553
|
|
|
from xmlrpclib import Binary |
554
|
|
|
|
555
|
|
|
server = SimpleXMLRPCServer((bind, port), allow_none=True, logRequests=logRequests) |
556
|
|
|
server.register_introspection_functions() |
557
|
|
|
server.register_multicall_functions() |
558
|
|
|
|
559
|
|
|
server.register_function(self.quit, '_quit') |
560
|
|
|
server.register_function(self.size) |
561
|
|
|
|
562
|
|
|
def sync_fetch(task): |
563
|
|
|
result = self.sync_fetch(task) |
564
|
|
|
result = Binary(umsgpack.packb(result)) |
565
|
|
|
return result |
566
|
|
|
server.register_function(sync_fetch, 'fetch') |
567
|
|
|
|
568
|
|
|
def dump_counter(_time, _type): |
569
|
|
|
return self._cnt[_time].to_dict(_type) |
570
|
|
|
server.register_function(dump_counter, 'counter') |
571
|
|
|
|
572
|
|
|
server.timeout = 0.5 |
573
|
|
|
while not self._quit: |
574
|
|
|
server.handle_request() |
575
|
|
|
server.server_close() |
576
|
|
|
|
577
|
|
|
def on_fetch(self, type, task): |
578
|
|
|
'''Called before task fetch''' |
579
|
|
|
pass |
580
|
|
|
|
581
|
|
|
def on_result(self, type, task, result): |
582
|
|
|
'''Called after task fetched''' |
583
|
|
|
status_code = result.get('status_code', 599) |
584
|
|
|
if status_code != 599: |
585
|
|
|
status_code = (int(status_code) / 100 * 100) |
586
|
|
|
self._cnt['5m'].event((task.get('project'), status_code), +1) |
587
|
|
|
self._cnt['1h'].event((task.get('project'), status_code), +1) |
588
|
|
|
|
589
|
|
|
if type == 'http' and result.get('time'): |
590
|
|
|
content_len = len(result.get('content', '')) |
591
|
|
|
self._cnt['5m'].event((task.get('project'), 'speed'), |
592
|
|
|
float(content_len) / result.get('time')) |
593
|
|
|
self._cnt['1h'].event((task.get('project'), 'speed'), |
594
|
|
|
float(content_len) / result.get('time')) |
595
|
|
|
self._cnt['5m'].event((task.get('project'), 'time'), result.get('time')) |
596
|
|
|
self._cnt['1h'].event((task.get('project'), 'time'), result.get('time')) |
597
|
|
|
|