c# 通过webView2模拟登陆小红书网页版，执行关键字搜索，以及解决X-s,X-t,X-S-Common签名验证【2023年5月8日】_小红书模拟浏览器接口请求

一、搜索接口及原理
1、搜索接口

url=https://edith.xiaohongshu.com/api/sns/web/v1/search/notes

2、数据

  var data={
    "keyword": "",        //搜索关键字：比如：风景视频
    "page": 1,              //返回第几页数据，1表示返回第一页数据；
    "page_size": 20,     //20表示一页数据有多少个笔记（视频）
    "search_id": "2blciviwfc1cdapvnknmj",        //搜索id，根据当前时间生成的唯一字符串;
    "sort": "general",                                         //排序方式：general 普通排序；
    "note_type": 0                                            //笔记类型：0表示：视频；
   };

3、请求头：

headers = {
  'authority':"edith.xiaohongshu.com",
  'method':"post",
  'Content-Type':"application/json;charset=utf8",
  'accept':"application/json, text/plain, */*",
  'accept-encoding':"gzip, deflate, br",
  'accept-language':"zh-CN,zh;q=0.9",
  "cache-control":"no-cache",
  "origin":"https://www.xiaohongshu.com",
  "pragma":"no-cache",
  "sec-ch-ua":"\"Not_A Brand\";v=\"99\", \"Google Chrome\";v=\"109\", \"Chromium\";v=\"109\"",
  "sec-ch-ua-mobile":"?0",
  "sec-ch-ua-platform":"\"Windows\"",
  "sec-fetch-dest":"empty",
  "sec-fetch-mode":"cors",
  "sec-fetch-site":"same-site",
  'cookie':"a1=186d30820a4m09cb6glhxe1aqks2olv1l97ow1gun50000408881;  web_session=040069b3b3f6625dade26f8d1d364b44f72187;  ",
  'referer':"https://www.xiaohongshu.com",
  "X-t":1683343307335,
  "X-s":"O6MKZYwvOYsLZBFisgqUZ61KsYF+OY1lsl1WZYZBsjM3",
  'X-S-Common':"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",
   'User-Agent': "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36"
}

cookie中的
a1客户端标识，参与X-S-Common签名；web_session登陆会话标识，登陆小红书时会产生此字段，大概1个月有效。
X-t，X-s必须的，由data和url签名产生；X-S-Common必须，由a1,X-t，X-s,MINI_BROSWER_INFO_KEY共同签名产生。

4、具备以上数据后，向服务器发送post请求。

var result = winning.getPostResultEx(url, data_json, headers);

如果参数错误，将返回：

{"code":-1,"success":false}

如果未登陆或web_session失效，将返回未登陆提示；
如果请求成功，将返回第一页（或某一页）（一页20个笔记）json数据：

{"msg":"成功","data":{"has_more":true,"items":[{"model_type":"note","note_card":{"cover":{"height":1706,"width":1280,"url":"https://sns-img-qc.xhscdn.com/1000g0081jf9ote2ao04g5o8kppjg8f48774fb60","trace_id":"1000g0081jf9ote2ao04g5o8kppjg8f48774fb60","file_id":"1000g0081jf9ote2ao04g5o8kppjg8f48774fb60"},"type":"normal","display_title":"美女多多","user":{"nick_name":"雄","avatar":"https://sns-avatar-qc.xhscdn.com/avatar/632952c77cccf41054bf74ec.jpg?imageView2/2/w/80/format/jpg","user_id":"6114ce670000000001003c88","nickname":"雄"},"interact_info":{"liked":false,"liked_count":"1805"}},"id":"6374df81000000001c036084"},{"id":"64195495000000001301092f","model_type":"note","note_card":{"type":"normal","user":{"avatar":"https://sns-avatar-qc.xhscdn.com/avatar/640142a9d27b886b440aea46.jpg?imageView2/2/w/80/format/jpg","user_id":"5cb9cc050000000017030ea4","nickname":"私拍女神","nick_name":"私拍女神"},"interact_info":{"liked":false,"liked_count":"311"},"cover":{"height":1646,"width":1234,"url":"https://sns-img-qc.xhscdn.com/1000g00827hn8oi4fm0005n5ppg2lu3l4q54q030","trace_id":"1000g00827hn8oi4fm0005n5ppg2lu3l4q54q030","file_id":"1000g00827hn8oi4fm0005n5ppg2lu3l4q54q030"}}},{"id":"6432dffc0000000012030dbf","model_type":"note","note_card":{"type":"normal","display_title":"18岁
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