使用C#发送Http 请求实现模拟登陆

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Policy;
using System.Text;

namespace WindowsFormsApplication1
{
    public class PostLogin
    {
        public static string GetLogin()
        {
            string url = "http://***/Login";
            string postData = "{\"UserName\":\"*******\",\"UserPassword\":\"************************\"}";
            CookieContainer cookie = GetCookie(postData, url);

            string result = GetContent(cookie, "http://www.*****.com");
            return result;
        }

        public static CookieContainer GetCookie(string postString, string postUrl)
        {
            CookieContainer cookie = new CookieContainer();
            HttpWebRequest httpRequset = (HttpWebRequest)HttpWebRequest.Create(postUrl);//创建http 请求
            httpRequset.CookieContainer = cookie;//设置cookie
            httpRequset.Method = "POST";//POST 提交
            httpRequset.Headers["RTSToken"] = "************************";
            httpRequset.Host = "wwww.****.com";
            httpRequset.KeepAlive = true;
            httpRequset.Headers["Origin"] = "www.***.com";
            httpRequset.Headers["Accept-Encoding"] = "gzip, deflate";
            httpRequset.Headers["Accept-Language"] = "zh-CN,zh;q=0.9";

            httpRequset.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36";
            httpRequset.Accept = "application/json, text/javascript, */*; q=0.01";
            httpRequset.ContentType = "application/json";//以上信息在监听请求的时候都有的直接复制过来
            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(postString);
            httpRequset.ContentLength = bytes.Length;
            Stream stream = httpRequset.GetRequestStream();
            stream.Write(bytes, 0, bytes.Length);
            stream.Close();//以上是POST数据的写入

            HttpWebResponse httpResponse = (HttpWebResponse)httpRequset.GetResponse();//获得服务端响应
            return cookie;//拿到cookie
        }

        static string GetContent(CookieContainer cookie, string url)
        {
            string content;
            HttpWebRequest httpRequest = (HttpWebRequest)HttpWebRequest.Create(url);
            httpRequest.CookieContainer = cookie;
            httpRequest.Referer = url;
            httpRequest.UserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko";
            httpRequest.Accept = "text/html, application/xhtml+xml, */*";
            httpRequest.ContentType = "application/x-www-form-urlencoded";
            httpRequest.Method = "GET";
            HttpWebResponse httpResponse = (HttpWebResponse)httpRequest.GetResponse();
            using (Stream responsestream = httpResponse.GetResponseStream())
            {
                using (StreamReader sr = new StreamReader(responsestream, System.Text.Encoding.UTF8))
                {
                    content = sr.ReadToEnd();
                }
            }
            return content;
        }
    }
}