Get和Post

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Web;

namespace SAO.Web.MyWebRequest
{
    public class HttpHelper
    {
        public static string ticket { get; set; } //该属性是用来获取令牌用的


        /// <summary>
        /// 获取请求结果
        /// </summary>
        /// <returns></returns>
        public static string GetHttpResult(HttpWebResponse response)
        {
            string result = string.Empty;
            using (Stream stream=response.GetResponseStream())
            {
                using (StreamReader reader=new StreamReader(stream,Encoding.UTF8))
                {
                    result = reader.ReadToEnd();
                }
            }
            return result;
        }

        /// <summary>  
        /// 创建GET方式的HTTP请求  
        /// </summary>  
        public static HttpWebResponse GetHttpResponse(string url, int timeout, string userAgent, CookieCollection cookies)
        {
            HttpWebRequest request = null;
            request.Method = "GET";
           
            if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
            {
                //对服务端证书进行有效性校验（非第三方权威机构颁发的证书，如自己生成的，不进行验证，这里返回true）
                ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
                request = WebRequest.Create(url) as HttpWebRequest;
                request.ProtocolVersion = HttpVersion.Version10;    //http版本，默认是1.1,这里设置为1.0
            }
            else
            {
                request = WebRequest.Create(url) as HttpWebRequest;
            }

            //设置代理UserAgent和超时
            request.Accept = "";
            request.Timeout = timeout;
            request.UserAgent = userAgent;

            //注：如果要调用WebApi，则需要在请求头增加一个属性来进行Basic认证
            request.Headers.Add(HttpRequestHeader.Authorization, "BasicAuth " + ticket);
          
            if (cookies != null)
            {
                request.CookieContainer = new CookieContainer();
                request.CookieContainer.Add(cookies);
            }
            return request.GetResponse() as HttpWebResponse;
        }

        /// <summary>  
        /// 创建POST方式的HTTP请求  
        /// </summary>  
        public static HttpWebResponse PostHttpResponse(string url, IDictionary<string, string> parameters, int timeout, string userAgent, CookieCollection cookies)
        {
            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";

            //设置代理UserAgent和超时
            request.UserAgent = userAgent;
            request.Timeout = timeout; 

            if (cookies != null)
            {
                request.CookieContainer = new CookieContainer();
                request.CookieContainer.Add(cookies);
            }
            //发送POST数据  
            if (!(parameters == null || parameters.Count == 0))
            {
                StringBuilder buffer = new StringBuilder();
                int i = 0;
                foreach (string key in parameters.Keys)
                {
                    if (i > 0)
                    {
                        buffer.AppendFormat("&{0}={1}", key, parameters[key]);
                    }
                    else
                    {
                        buffer.AppendFormat("{0}={1}", key, parameters[key]);
                        i++;
                    }
                }
                byte[] data = Encoding.ASCII.GetBytes(buffer.ToString());
                using (Stream stream = request.GetRequestStream())
                {
                    stream.Write(data, 0, data.Length);
                }
            }
            string[] values = request.Headers.GetValues("Content-Type");
            return request.GetResponse() as HttpWebResponse;
        }


        /// <summary>
        /// 验证证书
        /// </summary>
        private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        {
            if (errors == SslPolicyErrors.None)
                return true;
            return false;
        }
    }
}