分享一个能爬取所有百度贴吧图片的爬虫代码

这个代码是用python3写的.运行直接输入贴吧名就可以爬取图片!

    例: 爬取 美女吧   直接输入 美女

爬取完成后会自动生成一个download_img的文件夹,打开里面就是爬取的内容.

# @Time    : 2018/4/5 00:49
# @Author  : G_SANGSK


import urllib.request
import urllib.parse
from lxml import etree
import ssl
import os

def 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
    """

    #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 = urllib.request.Request(url)
    html = urllib.request.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 = urllib.request.Request(link, headers = headers)
    html = urllib.request.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 = urllib.request.Request(link, headers = headers)
    # 图片原始数据
    image = urllib.request.urlopen(request).read()
    # 取出连接后10位做为文件名
    filename = link[-10:]
    filename = "./download_img/" + filename
    # 写入到本地磁盘文件内
    if not os.path.exists("./download_img"):
        os.mkdir("./download_img")
    with open(filename, "wb") as f:
        f.write(image)
    print("已经成功下载 "+ filename)

def 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__":
    ssl._create_default_https_context = ssl._create_unverified_context
    kw = input("请输入要爬取贴吧名:")
    beginPage = int(input("请输起始页："))
    endPage = int(input("请输结束页："))

    url = "http://tieba.baidu.com/f?"
    key = urllib.parse.urlencode({"kw": kw})
    fullurl = url + key
    tiebaSpider(fullurl, beginPage, endPage)



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