Python爬虫工具库(异步爬虫类、线程池爬虫类、爬虫实用函数).zip

import time import logging from datetime import timedelta from tornado import httpclient, gen, ioloop, queues import traceback def logged(class_): logging.basicConfig(level=logging.INFO) class_.logger = logging.getLogger(class_.__name__) return class_ @logged class AsyncSpider(object): """A simple class of asynchronous spider.""" def __init__(self, urls, concurrency=10, results=None, **kwargs): super(AsyncSpider, self).__init__(**kwargs) self.concurrency = concurrency self._q = queues.Queue() self._fetching = set() self._fetched = set() if results is None: self.results = [] for url in urls: self._q.put(url) httpclient.AsyncHTTPClient.configure( "tornado.curl_httpclient.CurlAsyncHTTPClient" ) def fetch(self, url, **kwargs): fetch = getattr(httpclient.AsyncHTTPClient(), 'fetch') http_request = httpclient.HTTPRequest(url, **kwargs) return fetch(http_request, raise_error=False) def handle_html(self, url, html): """处理html页面""" print(url) def handle_response(self, url, response): """处理http响应，对于200响应码直接处理html页面， 否则按照需求处理不同响应码""" if response.code == 200: self.handle_html(url, response.body) elif response.code == 599: # retry self._fetching.remove(url) self._q.put(url) @gen.coroutine def get_page(self, url): # yield gen.sleep(10) # sleep when need try: response = yield self.fetch(url) self.logger.debug('######fetched %s' % url) except Exception as e: self.logger.debug('Exception: %s %s' % (e, url)) raise gen.Return(e) raise gen.Return(response) # py3 can just return response @gen.coroutine def _run(self): @gen.coroutine def fetch_url(): current_url = yield self._q.get() try: if current_url in self._fetching: return self.logger.debug('fetching****** %s' % current_url) self._fetching.add(current_url) response = yield self.get_page(current_url) self.handle_response(current_url, response) # handle reponse self._fetched.add(current_url) finally: self._q.task_done() @gen.coroutine def worker(): while True: yield fetch_url() # Start workers, then wait for the work queue to be empty. for _ in range(self.concurrency): worker() yield self._q.join(timeout=timedelta(seconds=300000)) try: assert self._fetching == self._fetched except AssertionError: # some http error not handle print(self._fetching-self._fetched) print(self._fetched-self._fetching) def run(self): io_loop = ioloop.IOLoop.current() io_loop.run_sync(self._run) class MySpider(AsyncSpider): def fetch(self, url, **kwargs): """重写父类fetch方法可以添加cookies，headers，timeout等信息""" cookies_str = "PHPSESSID=j1tt66a829idnms56ppb70jri4; pspt=%7B%22id%22%3A%2233153%22%2C%22pswd%22%3A%228835d2c1351d221b4ab016fbf9e8253f%22%2C%22_code%22%3A%22f779dcd011f4e2581c716d1e1b945861%22%7D; key=%E9%87%8D%E5%BA%86%E5%95%84%E6%9C%A8%E9%B8%9F%E7%BD%91%E7%BB%9C%E7%A7%91%E6%8A%80%E6%9C%89%E9%99%90%E5%85%AC%E5%8F%B8; think_language=zh-cn; SERVERID=a66d7d08fa1c8b2e37dbdc6ffff82d9e|1444973193|1444967835; CNZZDATA1254842228=1433864393-1442810831-%7C1444972138" headers = { 'User-Agent': 'mozilla/5.0 (compatible; baiduspider/2.0; +http://www.baidu.com/search/spider.html)', 'cookie': cookies_str } return super(MySpider, self).fetch( url, headers=headers, #proxy_host="127.0.0.1", proxy_port=8787, # for proxy ) def handle_html(self, url, html): print(url) #print(BeautifulSoup(html, 'lxml').find('title')) def main(): st = time.time() urls = [] n = 1000 for page in range(1, n): urls.append('http://www.jb51.net/article/%s.htm' % page) s = MySpider(urls, 10) s.run() print(time.time()-st) print(60.0/(time.time()-st)*1000, 'per minute') print(60.0/(time.time()-st)*1000/60.0, 'per second') if __name__ == '__main__': main()