自学记录--爬取贴吧图片

BoBuo

[Python] 纯文本查看 复制代码

#图片爬虫
import urllib
import urllib.request
from lxml import etree
 
class Spider(object):
    def __init__(self):
        self.tiebaName="java"
        self.beginPage=1
        self.endPage=3
        self.url="http://tieba.baidu.com/f?"
        self.ua_header={"User-Agent":"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36"}
        self.fileName=1
 
    #构造url
    def tiebaSpider(self):
        for page in range(self.beginPage,self.endPage+1):
            pn=(page-1)*50
            wo={'pn':pn,'kw':self.tiebaName}
            word=urllib.parse.urlencode(wo)
            myurl=self.url+word
            self.loadPage(myurl)
 
    #爬取页面内容
    def loadPage(self,url):
        req=urllib.request.Request(url,headers=self.ua_header)
        data=urllib.request.urlopen(req).read()
 
        html=etree.HTML(data)
        links=html.xpath('//div[@class="threadlist_lz clearfix"]/div/a/@href')
 
        for link in links:
            link="http://tieba.baidu.com"+link
            self.loadImages(link)
 
    #爬取帖子详情页，获取图片链接
    def loadImages(self,link):
        req=urllib.request.Request(link,headers=self.ua_header)
        data=urllib.request.urlopen(req).read()
        html=etree.HTML(data)
        links=html.xpath('//img[@class="BDE_Image" ]/@src')
        for imageslink in links:
            self.writeImages(imageslink)
 
    #通过图片所在链接，爬取图片并保存到本地
    def writeImages(self,imagesLink):
        print("正在存储图片：",self.fileName,"............")
        image=urlib.request.urlopen(imagesLink).read()
        
 
        file=open(r"D:\代码保存\保存图片\\"+str(self.fileName)+".jpg","wb")
 
        file.write(image)
 
        file.close()  
 
        self.fileName+=1
 
if __name__ == '__main__':
    
    mySpider=Spider()
 
    mySpider.tiebaSpider()