Python crawls a full set of skins for the glory of the king

1. Analyze the website that needs to be crawled

①、Open the official king of glory wallpaper website

• Website address: https://pvp.qq.com/web201605/wallpaper.shtml

② Shortcut key F12, call up the console for packet capture

③、Find the correct link and analyze

④. View the returned data format

⑤, resolve url link

⑥ Check whether the url content is the desired picture, and found that it is actually a thumbnail

⑦, then go to analyze the website, just click on a wallpaper, and view the link in the specified format

⑧、Find the target address###

⑨、Analyze the difference between target link and thumbnail

• Thumbnail: http://shp.qpic.cn/ishow/2735090714/1599460171_84828260_8311_sProdImgNo_6.jpg/200
• Target map: http://shp.qpic.cn/ishow/2735090714/1599460171_84828260_8311_sProdImgNo_6.jpg/0
• As you can know, replacing 200 after the thumbnail address of the specified format with 0 is the target real picture

Two, crawler code#

① At this point, the crawler analysis is complete, and the complete crawler code is as follows###

#! /usr/bin/env python
# encoding: utf-8'''
#-------------------------------------------------------------------
#     CONFIDENTIAL --- CUSTOM STUDIOS
#-------------------------------------------------------------------
#
#     @ Project Name :King of glory wallpaper download
#
#     @ File Name    : main.py
#
#     @ Programmer   : Felix
#
#     @ Start Date   :2020/7/3014:42
#
#     @ Last Update  :2020/7/3014:42
#
#-------------------------------------------------------------------'''
import os, time, requests, json, re
from retrying import retry
from urllib import parse
 
classHonorOfKings:'''
  This is a main Class, the file contains all documents.
  One document contains paragraphs that have several sentences
  It loads the original file and converts the original file to newcontent
  Then the newcontent will be saved by thisclass'''
 def __init__(self, save_path='./heros'):
  self.save_path = save_path
  self.time =str(time.time()).split('.')
  self.url ='https://apps.game.qq.com/cgi-bin/ams/module/ishow/V1.0/query/workList_inc.cgi?activityId=2735&sVerifyCode=ABCD&sDataType=JSON&iListNum=20&totalpage=0&page={}&iOrder=0&iSortNumClose=1&iAMSActivityId=51991&_everyRead=true&iTypeId=2&iFlowId=267733&iActId=2735&iModuleId=2735&_=%s'% self.time[0]
 
 def hello(self):'''
  This is a welcome speech
  : return: self
        '''
  print("*"*50)print(' '*18+'King of glory wallpaper download')print(' '*5+'Author: Felix  Date: 2020-05-20 13:14')print("*"*50)return self
 
 def run(self):'''
  The program entry
        '''
  print('↓'*20+'Format selection: '+'↓'*20)print('1.Thumbnail 2.1024x768 3.1280x720 4.1280x1024 5.1440x900 6.1920x1080 7.1920x1200 8.1920x1440')
  size =input('Please enter the serial number of the format you want to download, the default is 6:')
  size = size if size and int(size)in[1,2,3,4,5,6,7,8]else6print('---Download starts...')
  page =0
  offset =0
  total_response = self.request(self.url.format(page)).text
  total_res = json.loads(total_response)
  total_page =--int(total_res['iTotalPages'])print('---In total{}page...'.format(total_page))while True:if offset > total_page:break
   url = self.url.format(offset)
   response = self.request(url).text
   result = json.loads(response)
   now =0for item in result["List"]:
    now +=1
    hero_name = parse.unquote(item['sProdName']).split('-')[0]
    hero_name = re.sub(r'[【】:.<>|·@#$%^&() ]','', hero_name)print('---Downloading{}page{}Hero progress{}/{}...'.format(offset, hero_name, now,len(result["List"])))
    hero_url = parse.unquote(item['sProdImgNo_{}'.format(str(size))])
    save_path = self.save_path +'/'+ hero_name
    save_name = save_path +'/'+ hero_url.split('/')[-2]if not os.path.exists(save_path):
     os.makedirs(save_path)if not os.path.exists(save_name):withopen(save_name,'wb')as f:
      response_content = self.request(hero_url.replace("/200","/0")).content
      f.write(response_content)
   offset +=1print('---Download completed...')
 
 @ retry(stop_max_attempt_number=3)
 def request(self, url):'''
  Send a request
  : param url: the url of request
  : param timeout: the time of request
  : return: the result of request
        '''
  response = requests.get(url, timeout=10)
  assert response.status_code ==200return response
 
if __name__ =="__main__":HonorOfKings().hello().run()

②, detailed analysis link

• In fact, the front-end sends a jsonp request. Such data is not easy to handle in python because it is not a standard json format
• Because of the string JQuery1710418919222 in front of it, and everyone who knows the request of jsonp knows that with this prefix, the same callback parameter in the request link must be deleted.
• Therefore, this parameter is deleted in my python code
• There are many parameters in this link, in fact I think many of them can be deleted, but I don’t want to try it slowly
• The most important parameter in this request link must be the number of pages, which is the page parameter, iListNum=20&totalpage=0&page={}
• The above three parameters are available. One is 20, which refers to the number of pages. Totalpage is estimated to be useless. The page capture discovery starts from 0. This needs to be noted, because the following code needs to reduce the total number of pages by 1.

self.url ='https://apps.game.qq.com/cgi-bin/ams/module/ishow/V1.0/query/workList_inc.cgi?activityId=2735&sVerifyCode=ABCD&sDataType=JSON&iListNum=20&totalpage=0&page={}&iOrder=0&iSortNumClose=1&iAMSActivityId=51991&_everyRead=true&iTypeId=2&iFlowId=267733&iActId=2735&iModuleId=2735&_=%s'% self.time[0]

③、Format selection###

• When you start running, let you choose the serial number of the format you want to download. Why are there 8 formats? You can see the original web page. There are 8 different resolutions.
• Looking at the picture above, there are 1-8 thumbnail links, which correspond to thumbnails with 8 resolutions, so the original picture must also be 8 types
• Here I default to 1920*1080, generally computers can use this resolution
• The original image of 1 is actually a thumbnail if you try it yourself, so generally download 2-8

print('↓'*20+'Format selection: '+'↓'*20)print('1.Thumbnail 2.1024x768 3.1280x720 4.1280x1024 5.1440x900 6.1920x1080 7.1920x1200 8.1920x1440')
size =input('Please enter the serial number of the format you want to download, the default is 6:')
size = size if size and int(size)in[1,2,3,4,5,6,7,8]else6

④, download code analysis

• The first request is mainly to get the total number of pages, but the request starts from 0 as the first page, so you need to subtract 1
• While true is to start looping from 0 to request the address, first find the thumbnail address, and then replace the thumbnail address link 200 with 0 to be the target image address
• If there are special characters in the name, remove them with regular rules, otherwise it may affect the path search

print('---Download starts...')
page =0
offset =0
total_response = self.request(self.url.format(page)).text
total_res = json.loads(total_response)
total_page =--int(total_res['iTotalPages'])print('---In total{}page...'.format(total_page))while True:if offset > total_page:break
 url = self.url.format(offset)
 response = self.request(url).text
 result = json.loads(response)
 now =0for item in result["List"]:
  now +=1
  hero_name = parse.unquote(item['sProdName']).split('-')[0]
  hero_name = re.sub(r'[【】:.<>|·@#$%^&() ]','', hero_name)print('---Downloading{}page{}Hero progress{}/{}...'.format(offset, hero_name, now,len(result["List"])))
  hero_url = parse.unquote(item['sProdImgNo_{}'.format(str(size))])
  save_path = self.save_path +'/'+ hero_name
  save_name = save_path +'/'+ hero_url.split('/')[-2]if not os.path.exists(save_path):
   os.makedirs(save_path)if not os.path.exists(save_name):withopen(save_name,'wb')as f:
    response_content = self.request(hero_url.replace("/200","/0")).content
    f.write(response_content)
 offset +=1print('---Download completed...')

⑤, the results of the crawler running, put the same name in the same folder