Http请求类

public class HttpHelper
    {
        /// <summary>
        /// 证书校验
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="certificate"></param>
        /// <param name="chain"></param>
        /// <param name="errors"></param>
        /// <returns></returns>
        //public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
        //{   
        //    // 总是接受  
        //    return true;
        //}
        /// <summary>
        /// HttpGet
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="url"></param>
        /// <returns></returns>
        public static T HttpGet<T>(string url)
        {
            Stream stream = null;
            StreamReader sr = null;
            try
            {
                WebRequest ret = WebRequest.Create(url);
                ret.Method = "Get";
                ret.ContentType = "application/json;charset=UTF-8";
                HttpWebResponse response = (HttpWebResponse)ret.GetResponse();
                stream = ret.GetResponse().GetResponseStream();
                sr = new StreamReader(stream, Encoding.UTF8);
                string ApiResult = sr.ReadToEnd();
                var t = (T)JsonConvert.DeserializeObject<T>(ApiResult);
                return t;
            }
            catch
            {
                throw;
            }
            finally
            {
                stream.Close();
                sr.Close();
            }
        }
        /// <summary>
        /// HttpPost
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="paramData"></param>
        /// <param name="postUrl"></param>
        /// <param name="Token"></param>
        /// <returns></returns>
        public static T HttpPost<T>(string paramData, string postUrl, string Token = "")
        {
            StreamReader sr = null;
            Stream stream = null;
            HttpWebResponse response = null;
            try
            {
                byte[] byteArray = Encoding.UTF8.GetBytes(paramData); //转化
                                                                      //ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);//验证服务器证书回调自动验证
                HttpWebRequest ret = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));
                if (!string.IsNullOrEmpty(Token))
                {
                    ret.Headers["token"] = Token;
                }
                ret.Method = "POST";
                ret.ContentType = "application/json";
                ret.ContentLength = byteArray.Length;

                stream = ret.GetRequestStream();
                stream.Write(byteArray, 0, byteArray.Length);//写入参数
                stream.Close();

                try
                {

                    response = (HttpWebResponse)ret.GetResponse();

                }
                catch (WebException ex)
                {
                    response = (HttpWebResponse)ex.Response;

                }

                sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
                string ApiResult = sr.ReadToEnd();

                if (response.StatusCode != HttpStatusCode.OK)
                {
                    throw new WebException(ApiResult);
                }

                var t = JsonConvert.DeserializeObject<T>(ApiResult);
                return t;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            finally
            {
                sr.Close();
                response.Close();
                stream.Close();
            }
        }

        public static T HttpBytePost<T>(byte[] byteArray, string postUrl)
        {
            StreamReader sr = null;
            Stream stream = null;
            HttpWebResponse response = null;
            try
            {
                //byte[] byteArray = Encoding.UTF8.GetBytes(paramData); //转化
                HttpWebRequest ret = (HttpWebRequest)WebRequest.Create(new Uri(postUrl));
                ret.Method = "POST";
                ret.ContentType = "application/octet-stream";
                ret.ContentLength = byteArray.Length;
                stream = ret.GetRequestStream();
                stream.Write(byteArray, 0, byteArray.Length);//写入参数
                stream.Close();
                response = (HttpWebResponse)ret.GetResponse();
                sr = new StreamReader(response.GetResponseStream(), Encoding.Default);
                string ApiResult = sr.ReadToEnd();
                var t = JsonConvert.DeserializeObject<T>(ApiResult);
                return t;
            }
            catch (Exception ex)
            {

                throw ex;
            }
            finally
            {
                sr.Close();
                response.Close();
                stream.Close();
            }
        }