糗事百科python爬虫

# -*- coding: utf-8 -*-
#coding=utf-8

import urllib
import urllib2
import re
import thread
import time

class QSBK:
    def __init__(self):
        self.pageIndex=1
        self.user_agent = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
        self.header={'User-Agent':self.user_agent}
        self.store=[]
        self.enable=False
    def getPage(self,pageIndex):
        try:
            url = 'http://www.qiushibaike.com/hot/page/'+str(pageIndex)
            request = urllib2.Request(url,headers=self.header)
            response = urllib2.urlopen(request)
            pageHtml =response.read().decode('utf-8')
            return pageHtml
        except urllib2.URLError,e:
            print '链接网络失败'+e.reason
            return None
    def getPageItem(self,pageIndex):
        page = self.getPage(pageIndex)
        if page==None:
            print "页面获得失败"
            return  None
        pattern = re.compile('<div class="author.*?<a.*?<img.*?</a>.*?<a.*?<h2>(.*?)</h2>.*?class="content.*?<span>\s*(.*?)\s*</span>',re.S)
        items = re.findall(pattern, page)
        pageStories = []
        for item in items:
            pageStories.append([item[0],item[1]])
        return pageStories
    def loadPage(self):
        if self.enable==True:
            if len(self.store)<2:
                pageStories = self.getPageItem(self.pageIndex)
                if pageStories!=None:
                    self.store.append(pageStories)
                    self.pageIndex+=1
    def getOneStory(self,pageStories):
        for story in pageStories:
            input= raw_input()
            self.loadPage()
            if input=='Q':
                self.enable=False
                return
            print u'%s %s'%(story[0],story[1])
    def start(self):
        print u"正在读取糗事百科的数据，按Q退出"
        self.enable=True
        self.loadPage()
        nowPage=0
        while self.enable:
            if len(self.store)>0:
                pageStore=self.store[0]
                nowPage+=1
                del self.store[0]
                self.getOneStory(pageStore)

spider =QSBK()
spider.start()