HttpUtil.cs

using System;
using System.Collections.Specialized;
using System.IO;
using System.Net;
using System.Net.Security;
using System.Runtime.ConstrainedExecution;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Web;

namespace zopsdk_net
{
    public class HttpUtil
    {
        
       
        private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            return true; //总是接受  
        }
        
        public static string post(string url, NameValueCollection Hederparameters, string querystring, int timeout)
        {
            string returns = "";
            HttpWebRequest request = null;
            //如果是发送HTTPS请求  
            if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
            {
                ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                request = WebRequest.Create(url) as HttpWebRequest;
                request.ProtocolVersion = HttpVersion.Version10;
            }
            else
            {
                request = WebRequest.Create(url) as HttpWebRequest;
            }
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            if (Hederparameters != null)
            {
                request.Headers.Add(Hederparameters);
            }
                request.Timeout = timeout;
       
            //如果需要POST数据  
                
                byte[] data = Encoding.UTF8.GetBytes(querystring);
                using (Stream stream = request.GetRequestStream())
                {
                    stream.Write(data, 0, data.Length);
                }
            HttpWebResponse response = request.GetResponse() as HttpWebResponse;
            Stream responseStream = response.GetResponseStream();
            StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);
            string ret = reader.ReadToEnd();
            reader.Close();
            responseStream.Close();
            returns = ret;
            return returns;
        }
    }
}