ajax是什么

AJAX 最大的优点是在不重新加载整个页面的情况下，可以与服务器交换数据并更新部分网页内容。
在抓包工具里交xhr

ajax示例

1. 破解百度翻译
   代码：

# 破解百度翻译
# 有反爬

# coding:utf-8
import requests
import json
if __name__=="__main__":
    url="https://fanyi.baidu.com/v2transapi?from=en&to=zh"
    word=input("请输入单词")
    data={
        'query':word
    }
    headers={
        "User-Agent" : "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36 Edg/100.0.1185.39"
    }
    response=requests.post(url=url,data=data,headers=headers)

    page_json=response.json()
    with open("./index.json",'w',encoding='utf-8') as fp:
        json.dump(page_json,fp,ensure_ascii=False)
    print("爬取结束")

换一个网站

# 破解有道翻译
# 有反爬

# coding:utf-8
import requests
import json
if __name__=="__main__":
    url="https://fanyi.youdao.com/translate_o?smartresult=dict&smartresult=rule"
    word=input("请输入单词")
    data={
        'i':word
    }
    headers={
        "User-Agent" : "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36 Edg/100.0.1185.39"
    }
    response=requests.post(url=url,data=data,headers=headers)

    page_json=response.json()
    with open("./index.json",'w',encoding='utf-8') as fp:
        json.dump(page_json,fp,ensure_ascii=False)
    print("爬取结束")

2. 爬取豆瓣电影
   代码：

# 爬取豆瓣电影
# coding=utf-8
# 有反爬

import requests
import json
if __name__=="__main__":
    url="https://movie.douban.com/j/new_search_subjects"
    data={
        'sort':'U',
        'range':'0,10',
        'tags': '',
        'start': '80',
        'genres': '灾难'
        
    }
    headers={
        'User-Agent':"Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36 SE 2.X MetaSr 1.0"
    }
    resopnse=requests.post(url=url,data=data,headers=headers)
    page_json=response.json()
    with open("./index.json",'w') as fp:
        json.dump(page_json,fp)
    print('爬取结束')

3. 爬取肯德基餐厅位置
   代码：

# 肯德基餐厅位置
# coding=utf-8
# 有反爬

import requests
import json
if __name__=="__main__":
    url="http://www.kfc.com.cn/kfccda/ashx/GetStoreList.ashx"
    data={
        'cname':'' ,
        'pid': '',
        'keyword': '北京',
        'pageIndex': '1',
        'pageSize': '10'
    }
    headers={
        'User-Agent':"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.36 Edg/100.0.1185.39"
    }
    resopnse=requests.post(url=url,data=data,headers=headers)
    page_text=response.text
    with open("./index.html",'w') as fp:
        fp.write(page_text)
    print('爬取结束')