文章标题

百度贴吧图片爬去

#!/usr/bin/env python# -*- coding:utf-8 -*-import urllibimport urllib2from lxml import etreedef loadPage(url):    """        作用：根据url发送请求，获取服务器响应文件        url: 需要爬取的url地址    """    #print url    #headers = {"User-Agent" : "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_0) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11"}    request = urllib2.Request(url)    html = urllib2.urlopen(request).read()    # 解析HTML文档为HTML DOM模型    content = etree.HTML(html)    #print content    # 返回所有匹配成功的列表集合    link_list = content.xpath('//div[@class="t_con cleafix"]/div/div/div/a/@href')    #link_list = content.xpath('//a[@class="j_th_tit"]/@href')    for link in link_list:        fulllink = "http://tieba.baidu.com" + link        # 组合为每个帖子的链接        #print link        loadImage(fulllink)# 取出每个帖子里的每个图片连接def loadImage(link):    headers = {"User-Agent" : "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36"}    request = urllib2.Request(link, headers = headers)    html = urllib2.urlopen(request).read()    # 解析    content = etree.HTML(html)    # 取出帖子里每层层主发送的图片连接集合    #link_list = content.xpath('//img[@class="BDE_Image"]/@src')    link_list = content.xpath('//div[@class="post_bubble_middle"]')    #link_list = content.xpath('//img[@class="BDE_Image"]/@src')    # 取出每个图片的连接    for link in link_list:        print link        #writeImage(link)def writeImage(link):    """        作用：将html内容写入到本地        link：图片连接    """    #print "正在保存 " + filename    headers = {"User-Agent" : "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36"}    # 文件写入    request = urllib2.Request(link, headers = headers)    # 图片原始数据    image = urllib2.urlopen(request).read()    # 取出连接后10位做为文件名    filename = link[-10:]    # 写入到本地磁盘文件内    with open(filename, "wb") as f:        f.write(image)    print "已经成功下载 "+ filenamedef tiebaSpider(url, beginPage, endPage):    """        作用：贴吧爬虫调度器，负责组合处理每个页面的url        url : 贴吧url的前部分        beginPage : 起始页        endPage : 结束页    """    for page in range(beginPage, endPage + 1):        pn = (page - 1) * 50        #filename = "第" + str(page) + "页.html"        fullurl = url + "&pn=" + str(pn)        #print fullurl        loadPage(fullurl)        #print html        print "谢谢使用"if __name__ == "__main__":    kw = raw_input("请输入需要爬取的贴吧名:")    beginPage = int(raw_input("请输入起始页："))    endPage = int(raw_input("请输入结束页："))    url = "http://tieba.baidu.com/f?"    key = urllib.urlencode({"kw": kw})    fullurl = url + key    tiebaSpider(fullurl, beginPage, endPage)