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python爬虫一键爬取淘宝天猫宝贝页面主图颜色图和详情图
2017-02-13 09:21:38         来源:mzbqhbc12的博客  
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import requests

import re,sys,os
import json
import threading
import pprint

class spider:
    def __init__(self,sid,name):
     
        self.id = sid
        self.headers = { "Accept":"text/html,application/xhtml+xml,application/xml;",
            "Accept-Encoding":"gzip",
            "Accept-Language":"zh-CN,zh;q=0.8",
            "Referer":"https://www.example.com/",
            "User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.90 Safari/537.36"
            }

        
        self.name=name

    def openurl(self,url):
        
        self.request = requests.get(url,headers = self.headers)        
        if self.request.ok:
            return self.request.text
         
        
        
    def matchs(self):
        
        tmall_exp = r"Setup\(([\s\S]+?)\);"### 匹配商品数据的正则
        detail= r"src=\"(https://img\S+?[jpgifn]+?)\""  ###匹配 商品详情图的正则
        html = self.openurl("https://detail.tmall.com/item.htm?id=%s"%self.id)
        data = re.findall(tmall_exp,html)
        data = json.loads(data[0])
        main_img = data['propertyPics'] ## 这里包括了主图和颜色图的地址
        color_data =data['valItemInfo'] ['skuList']  ### 这里获得商品的颜色信息列表   包括颜色编码  颜色名称,商品skuID
        detail_html = self.openurl("http:"+data['api']["httpsDescUrl"])
        detail_image = re.findall(detail,detail_html)
        self.newdata={"MAIN":main_img['default'],"DETAIL":detail_image,"id":self.id,}
        
        psvs = []
        self.newdata['COLOR']=[]
       
        for v in range(len(color_data)):
            if ";"in color_data[v]["pvs"]:
                psv = color_data[v]['pvs'][color_data[v]['pvs'].find(";")+1:]
            else:
                psv = color_data[v]['pvs']
            if psv in psvs:
                
                continue
            psvs.append(psv)
        
            self.newdata['COLOR'].append({color_data[v]["names"]:main_img[";"+psv+";"]})
           
        pprint.pprint(self.newdata)

       
     
        return self.newdata
       


    def download(self):
        if len(self.newdata)>0:
            for x in range(len(self.newdata['MAIN'])):
         
                threading.Thread(target=self.download_main,args=(self.newdata['MAIN'][x],x)).start()
                
            for x in self.newdata['COLOR']:
            
                threading.Thread(target=self.download_color,args=(x,)).start()
            for x in range(len(self.newdata['DETAIL'])):
                
                threading.Thread(target=self.download_detail,args=(self.newdata['DETAIL'][x],x)).start()
        return


    def download_main(self,url,index):
        try:
            img = requests.get("http:"+url,stream=True,headers = self.headers,timeout=10)

        except:
            print(sys.exc_info())
            return
        if img.ok:
            if not os.path.exists(self.name+"/main"):
                try:
                    os.makedirs(self.name+"/main")
                except:
                    pass
            imgs = open(self.name+"/main/%s.jpg"%index,"wb")
            imgs.write(img.content)
            imgs.close()
            
    def download_color(self,url):
         
        try:
            img = requests.get("http:"+url[list(url.keys())[0]][0],stream=True,headers = self.headers,timeout=10)

        except:
            print(sys.exc_info())
            return
        if img.ok:
            if not os.path.exists(self.name+"/color"):
                try:
                    os.makedirs(self.name+"/color")
                except:
                    pass
            if "/"in list(url.keys())[0]:
                color = list(url.keys())[0].replace("/","_")
            elif "\\" in list(url.keys())[0]:
                color = list(url.keys())[0].replace("\\","_")
            else:
                color = list(url.keys())[0]
            imgs = open(self.name+"/color/%s.jpg"%color,"wb")
            imgs.write(img.content)
            imgs.close()


    def download_detail(self,url,index):

        try:
            img = requests.get(url,stream=True,headers = self.headers,timeout=10)

        except:
            print(sys.exc_info())
            return
        if img.ok:
            if not os.path.exists(self.name+"/detail"):
                try:
                    os.makedirs(self.name+"/detail")
                except:
                    pass
            
            imgs = open(self.name+"/detail/%s.jpg"%index,"wb")
            imgs.write(img.content)

            imgs.close()
            
            

if __name__ =="__main__":
    
    sid = 528766269341 ## 这里输入天猫宝贝ID
    
    
    taobao = spider(sid,"下载图片/T")

    
    taobao.matchs()
  
   
    taobao.download()
    

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