本文主要是介绍python yellow page thread crawler，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
把之前的爬虫用python改写了，多线程和队列 来抓取，典型的生产者消费者模式 ，用mvc分层来写的#-*- coding: utf-8 -*-'''spider.py
Created on 2013-12-21http://www.cn360cn.com/news.aspx?pageno=2
@author: Administrator
'''
import Pager
import Queue
import sys
import time
import threadingtask_queue = Queue.Queue(10)class ProducerThread(threading.Thread):def __init__(self,threadname):threading.Thread.__init__(self)self.name = threadnamedef run(self):for page in xrange(1,50000):url = 'http://www.cn360cn.com/news.aspx?pageno=%d' % pagetask_queue.put(url)print "put %s " % urlclass ConsumerThread(threading.Thread):name = ''url = ''def __init__(self,threadname):threading.Thread.__init__(self)self.name = threadnamedef run(self):while 1:print self.namepage = Pager.Pager()url = task_queue.get()print "get %s " % urltry:page.get_html(url)except Exception as e:print "exception occurred : " , efinally:task_queue.task_done()#控制速度time.sleep(0.5)print "start crawing ...."producer = ProducerThread("crawler producer ....")
producer.setDaemon(True)
producer.start()thread_num = 60
threads = []
for num in xrange(thread_num):print "crawler consumer : %d " % numthreads.append(ConsumerThread("crawler consumer : %d " % num))for num in xrange(thread_num):threads[num].setDaemon(True)threads[num].start()#只到所有任务完成后，才退出主程序
task_queue.join()print "finished ...."HttpClient.py
# -*- coding:utf-8 -*-import urllib,urllib2class HttpClient:user_agent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36'proxy = ''def __init__(self):urllib2.socket.setdefaulttimeout(8) # timeoutpassdef set_ua(self,user_agent):self.user_agent = user_agentdef set_proxy(self,proxy):self.proxy = proxydef get(self,url,data = {}):headers = { 'User-Agent' : self.user_agent,'Referer': 'http://www.cn360cn.com/','Host':'www.cn360cn.com'}data = urllib.urlencode(data)req = urllib2.Request(url, data, headers) response = urllib2.urlopen(req) response = response.read() return responseif __name__ == '__main__':c = HttpClient()print c.get("http://blog.csdn.net/pleasecallmewhy/article/details/8923067") pager.py# -*_ coding: utf-8 -*-
'''
Created on 2013-12-21@author: Administrator
'''
import HttpClient
import re
import Daoclass Pager:client = ''dao = ''def __init__(self):self.client = HttpClient.HttpClient()self.dao = Dao.Mysql()passdef get_html(self,url):html = self.client.get(url)#gb2312 to unicode to utf8html = html.decode('gb2312', 'ignore').encode('utf-8')
# print htmlself.parse_html(html)def parse_html(self,html):page_pattern = re.compile(r'<li>\s*<a.*?>(.*?)<\/a>\s*<div\s+class=tel\s*>\s*电话:(.*?)地址:(.*?)<\/div>\s*<\/li>', re.I | re.M)
# page_pattern = re.compile(r'<li>\s*<a.*?>(.*?)<\/a>\s*<div\s+class=tel\s*>\s*(.*?)<\/div>\s*<\/li>', re.I | re.M)result = page_pattern.findall(html)for item in result:
# print item[0],',',item[1],',',item[2]tag, number, address = item[0],item[1],item[2]number = number.strip()number = number.replace("-", "")tag = tag.strip()address = address.strip()temp = {'tag':tag,'number':number,'address':address}result = self.dao.insert(temp)if __name__ == '__main__':page = Pager()url = 'http://www.cn360cn.com/news.aspx?pageno=2'page.get_html(url) Dao.py'''
Created on 2013-7-20@author: Administrator
'''
import MySQLdb
import config;
import sysclass Mysql:table = 'cn360'conn = ''def __init__(self):self.conn = MySQLdb.connect(host=config.conf['host'], user= config.conf['user'],passwd=config.conf['pwd'],db=config.conf['db'],charset=config.conf['charset'])self.cursor = self.conn.cursor();def insert(self, data):if not data:return Falsesql = "insert ignore into " + self.table + " set "for k, v in enumerate(data):sql += v + "='" + MySQLdb.escape_string(data[v]) + "',"sql = sql.strip(',')
# print sqlreturn self.execute(sql)def execute(self, sql):if not sql:return Falsetry:self.cursor.execute(sql)self.conn.commit()except:self.conn.rollback();return Falsereturn Truedef get_rows(self, sql):if not sql:return Falseresult = self.execute(sql)if result:return self.cursor.fetchall()return Falsedef update(self, source, filter_array = None):if not source:return Falsesql = "update " + self.table + " set "for k, v in enumerate(source):sql += v + "='" + MySQLdb.escape_string(source[v]) + "',"sql = sql.strip(',')if filter_array:where = ''for k, v in enumerate(filter_array):where += v + "='" + MySQLdb.escape_string(filter_array[v]) + "',"where = where.strip(',')if where:sql += " where " + whereprint sqlreturn self.execute(sql)def delete(self, filter_array = None):if not filter_array:return Falsesql = "delete from " + self.tableif filter_array:where = ''for k, v in enumerate(filter_array):where += v + "='" + MySQLdb.escape_string(filter_array[v]) + "',"where = where.strip(',')if where:sql += " where " + whereprint sqlreturn self.execute(sql)def destroy(self): self.conn = Noneself.cursor = None
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