using Newtonsoft.Json;using System;using System.Collections.Generic;using System.IO;using System.Net;using System.Net.Security;using System.Security.Cryptography.X509Certificates;using System.Text;namespace ZhuoHuiSchoolRoom.ZhuoHuiClass{    class HttpWebResponseUtility    {        private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";        /// 
         /// 创建GET方式的HTTP请求         /// 
         /// 请求的URL         /// 请求的超时时间         /// 请求的客户端浏览器信息，可以为空         /// 随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空         /// 
              public static HttpWebResponse CreateGetHttpResponse(string url, int? timeout, string userAgent, CookieCollection cookies)        {            if (string.IsNullOrEmpty(url))            {                throw new ArgumentNullException("url");            }            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;            request.Method = "GET";            request.UserAgent = DefaultUserAgent;            if (!string.IsNullOrEmpty(userAgent))            {                request.UserAgent = userAgent;            }            if (timeout.HasValue)            {                request.Timeout = timeout.Value;            }            if (cookies != null)            {                request.CookieContainer = new CookieContainer();                request.CookieContainer.Add(cookies);            }            return request.GetResponse() as HttpWebResponse;        }        /// 
         /// 创建POST方式的HTTP请求         /// 
         /// 请求的URL         /// json字符串         /// 发送HTTP请求时所用的编码         /// 
              public static HttpWebResponse CreatePostHttpResponse(string url, string str, Encoding requestEncoding)        {            if (string.IsNullOrEmpty(url))            {                throw new ArgumentNullException("url");            }            if (requestEncoding == null)            {                throw new ArgumentNullException("requestEncoding");            }            HttpWebRequest request = null;            request = WebRequest.Create(url) as HttpWebRequest;            request.Method = "POST";            request.ContentType = "application/json;charset=utf-8";            request.UserAgent = DefaultUserAgent;            byte[] data = requestEncoding.GetBytes(str.ToString()); //将json转为二进制流            using (Stream stream = request.GetRequestStream())            {                stream.Write(data, 0, data.Length);            }            return request.GetResponse() as HttpWebResponse;        }        /// 
        /// 创建DELETE方式的HTTP请求        /// 
        /// 请求地址        /// 
             public static HttpWebResponse CreateDeleteHttpResponse(string url)        {            HttpWebRequest request = null;            string urlPath = url;            int millisecond = 30000;            request = (HttpWebRequest)WebRequest.Create(urlPath);            //request.Proxy = null;//关闭代理（重要）            request.Timeout = millisecond;            request.Method = "DELETE";            //request.Accept = "application/json";            //request.ContentType = "application/json";            request.ServicePoint.Expect100Continue = false;            return request.GetResponse() as HttpWebResponse;        }        private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)        {            return true; //总是接受         }        /// 
        /// HttpPost上传多个文件        /// 
        /// 请求地址        /// 路径集合        /// 
             public static HttpWebResponse HttpUploadFile(string url, List
     
       pathList)        {            // 设置参数            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;            CookieContainer cookieContainer = new CookieContainer();            request.CookieContainer = cookieContainer;            request.AllowAutoRedirect = true;            request.Method = "POST";            string boundary = "----" + DateTime.Now.Ticks.ToString("x"); // 随机分隔线            request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;            byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");            byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");            Stream postStream = request.GetRequestStream();            for (int i = 0; i < pathList.Count; i++)            {                int pos = pathList[i].LastIndexOf("\\");                string fileName = pathList[i].Substring(pos + 1); //取文件名                                                                  //请求头部信息                 StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));                byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());                FileStream fs = new FileStream(pathList[i], FileMode.Open, FileAccess.Read);                byte[] bArr = new byte[fs.Length];                fs.Read(bArr, 0, bArr.Length);                fs.Close();                postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);                postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);                postStream.Write(bArr, 0, bArr.Length);            }            postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);            postStream.Close();            //发送请求并获取相应回应数据            return request.GetResponse() as HttpWebResponse;        }    }}