Python_爬虫_百度图片

#思路：抓取图片地址，根据地址转存图片(注意名称)；难点：转码

# -*- coding:utf-8 -*-
from urllib import request,error
import json,re


# for page in range(4):
#     url = "http://image.baidu.com/search/acjson?tn=resultjson_com&ipn=rj&ct=201326592&is=&fp=result&queryWord=%E5%93%88%E5%A3%AB%E5%A5%87&cl=2&lm=-1&ie=utf-8&oe=utf-8&adpicid=&st=-1&z=&ic=0&word=%E5%93%88%E5%A3%AB%E5%A5%87&s=&se=&tab=&width=&height=&face=0&istype=2&qc=&nc=1&fr=&pn="+str(page*30)+"&rn=30&gsm=1e&1520997016315="
#     try:
#         response = request.urlopen(url).read().decode("utf-8")
#         print(type(response))
#
#     except error.URLError as e:
#         print(e.reason)
#
class BaiduImg(object):
    def __init__(self):
        super(BaiduImg,self).__init__()
        print(‘开始采集图片‘)
        self.page = 30
    def request(self):
        while self.page <= 30:
            request_url=‘http://image.baidu.com/search/acjson?tn=resultjson_com&ipn=rj&ct=201326592&is=&fp=result&queryWord=%E5%93%88%E5%A3%AB%E5%A5%87&cl=2&lm=-1&ie=utf-8&oe=utf-8&adpicid=&st=-1&z=&ic=0&word=%E5%93%88%E5%A3%AB%E5%A5%87&s=&se=&tab=&width=&height=&face=0&istype=2&qc=&nc=1&fr=&pn=30&rn=30&gsm=1e&1520997014923=‘
            # print(len(request_url))
            headers = {
                ‘user-Agent‘:‘Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.140 Safari/537.36‘
                # ‘Content-type‘:‘text/html‘
                # ‘Content-type‘: ‘text/html‘
            }
            req=request.Request(request_url,headers=headers)
            with request.urlopen(req) as f:
                if f.status == 200:
                    content = f.read().decode(‘utf-8‘)
                    content_dict = json.loads(content)
                    self.download2(content_dict[‘data‘])
            self.page += 30
    #下载图片的方法
    def dowload(self,data):
        for image in data:
            if image.get(‘middleURL‘):
                url = image[‘middleURL‘]
            elif image.get(‘thumbURL‘):
                url = image[‘thumbURl‘]
            elif image.get(‘hoverURL‘):
                url = image[‘hoverURL‘]
            else:
                url=‘‘
            if url:
                data = request.urlopen(url).read()
                imageName = strip(image[‘fromPageTitleEnc‘])
                FileName = str(‘images/‘)+imageName+str(‘.jpg‘)
                with open(FileName,‘wb‘) as f:
                    f.write(data)
    #使用urllib.request.urlretrive()保存图片
    # 使用urllib.request.urlretrieve()保存图片
    def download2(self, data):
        for image in data:
            if image.get(‘middleURL‘):
                url = image[‘middleURL‘]
            elif image.get(‘thumbURL‘):
                url = image[‘thumbURL‘]
            else:
                url = ""
            if url:
                imageName = strip(image[‘fromPageTitleEnc‘])
                filePath = str(‘images/‘) + imageName + str(‘.jpg‘)
                request.urlretrieve(url, filePath)
#过滤函数
def strip(path):
    path = re.sub(r‘[?\\*|"<>:/!?]‘,‘‘,str(path))
    return path
if __name__ == ‘__main__‘:
    bi = BaiduImg()
    bi.request()