用python爬取app照片

首先下载一个斗鱼（不下载也可以，url都在这了对吧）

 　　通过抓包，抓取到一个json的数据包，得到下面的地址

　　观察测试可知，通过修改offset值就是相当于app的翻页

　　访问这个url，返回得到的是一个大字典，字典里面两个索引，一个error，一个data。而data又是一个长度为20的数组，每个数组又是一个字典。每个字典中又有一个索引，vertical_src。

　　我们的目标就是它了！

import urllib.parse
import urllib
import json
import urllib.request
data_info={}
data_info['type']='AUTO'
data_info['doctype']='json'
data_info['xmlVersion']='1.6'
data_info['ue']='UTF-8'
data_info['typoResult']='true'
head_info={}
head_info['User-Agent']='DYZB/2.271 (iphone; iOS 9.3.2; Scale/3.00)'
url='http://capi.douyucdn.cn/api/v1/getVerticalRoom?aid=ios&client_sys=ios&limit=20&offset=20'
data_info=urllib.parse.urlencode(data_info).encode('utf-8')
print(data_info)
requ=urllib.request.Request(url,data_info)
requ.add_header('Referer','http://capi.douyucdn.cn')
requ.add_header('User-Agent','DYZB/2.271 (iphone; iOS 9.3.2; Scale/3.00)')
response=urllib.request.urlopen(requ)
print(response)
html=response.read().decode('utf-8')

这短短20多行代码就能返回得到json数据了。然后再通过对这json代码的切片，分离得到每个主播照片的url地址。

然后得到这一页的照片

import json
import urllib.request
data_info={}
data_info['type']='AUTO'
data_info['doctype']='json'
data_info['xmlVersion']='1.6'
data_info['ue']='UTF-8'
data_info['typoResult']='true'

11 url+str(i)='http://capi.douyucdn.cn/api/v1/getVerticalRoom?aid=ios&client_sys=ios&limit=20&offset='+str(x)
data_info=urllib.parse.urlencode(data_info).encode('utf-8')
print(data_info)
requ=urllib.request.Request(url,data_info)
requ.add_header('Referer','http://capi.douyucdn.cn')
requ.add_header('User-Agent','DYZB/2.271 (iphone; iOS 9.3.2; Scale/3.00)')
response=urllib.request.urlopen(requ)
print(response)
html=response.read().decode('utf-8')
'''
 print(type(dictionary))
print(type(dictionary[data]))
'''
dictionary=json.loads(html)
data_arr=dictionary["data"]
for i in range(0,19):
    name=data_arr[i]["nickname"]
    img_url=data_arr[i]["vertical_src"]
29     print(type(img_url))
    respon_tem=urllib.request.urlopen(img_url)
31     anchor_img=respon_tem.read()
    with open('../photos/'+name+'.jpg','wb') as f:
        f.write(anchor_img)

然后修改一下，让它有了翻页的功能

import urllib.parse
import urllib
import json
import urllib.request
data_info={}
data_info['type']='AUTO'
data_info['doctype']='json'
data_info['xmlVersion']='1.6'
data_info['ue']='UTF-8'
data_info['typoResult']='true'
data_info=urllib.parse.urlencode(data_info).encode('utf-8')

for x in range(0,195):
    url='http://capi.douyucdn.cn/api/v1/getVerticalRoom?aid=ios&client_sys=ios&limit=20&offset='+str(x)
    print(data_info)
    requ=urllib.request.Request(url,data_info)
    requ.add_header('Referer','http://capi.douyucdn.cn')
    requ.add_header('User-Agent','DYZB/2.271 (iphone; iOS 9.3.2; Scale/3.00)')
    response=urllib.request.urlopen(requ)
    print(response)
    html=response.read().decode('utf-8')
    dictionary=json.loads(html)
    data_arr=dictionary["data"]
    for i in range(0,19):
        name=data_arr[i]["nickname"]
        img_url=data_arr[i]["vertical_src"]
        print(type(img_url))
        respon_tem=urllib.request.urlopen(img_url)
        anchor_img=respon_tem.read()
        with open('../photos/'+name+'.jpg','wb') as f:
            f.write(anchor_img)

然后就等着吧~~

最好设置一下时间，每隔多久爬一次，或者每隔多久更换一次ip。就行了