using System;

using System.IO;

using System.Net;

using System.Net.Http;

using System.Net.Http.Headers;

using System.Text;

namespace FrameWork.Common.Web

{

    public class HttpHelper

    {

        /// <summary>

        /// 发起一个HTTP请求（以POST同步方式）

        /// </summary>

        /// <param name="url">请求地址</param>

        /// <param name="param">参数：json格式字符串</param>

        public static string HttpPost(string url, string param = "")

        {

            var request = (HttpWebRequest)WebRequest.Create(url);

            request.Method = "POST";

            request.ContentType = "application/json";

            request.Accept = "*/*";

            request.Timeout = ;

            request.AllowAutoRedirect = false;

            StreamWriter requestStream = null;

            WebResponse response = null;

            string responseStr = null;

            try

            {

                requestStream = new StreamWriter(request.GetRequestStream());

                requestStream.Write(param);

                requestStream.Close();

                response = request.GetResponse();

                if (response != null)

                {

                    var reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8);

                    responseStr = reader.ReadToEnd();

                    reader.Close();

                }

            }

            catch (Exception e)

            {

                throw e;

            }

            finally

            {

                request = null;

                requestStream = null;

                response = null;

            }

            return responseStr;

        }

        /// <summary>

        /// get请求，同步方式

        /// </summary>

        public static string HttpGet(string url, string postDataStr)

        {

            var request = (HttpWebRequest)WebRequest.Create(url + (postDataStr == "" ? "" : "?") + postDataStr);

            request.Method = "GET";

            request.ContentType = "text/html;charset=UTF-8";

            var response = (HttpWebResponse)request.GetResponse();

            var myResponseStream = response.GetResponseStream();

            var myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));

            var retString = myStreamReader.ReadToEnd();

            myStreamReader.Close();

            myResponseStream.Close();

            return retString;

        }

        /// <summary>

        /// 发送短信，异步请求
　　　　 /// </summary>

        /// <param name="url">请求地址</param>

        /// <param name="jsonString">json字符串，手机号和短信内容必填</param>

        public static void SendMessage(string url, string jsonString)

        {

            var client = new HttpClient();

            HttpContent httpContext = new StringContent(jsonString, Encoding.UTF8);

            httpContext.Headers.ContentType = new MediaTypeHeaderValue("application/json");

            //await异步等待回应

            client.PostAsync(url, httpContext).ContinueWith(t =>

            {

                // Get HTTP response from completed task.

                var response = t.Result;

                // Check that response was successful or throw exception

                response.EnsureSuccessStatusCode();

                // Read response asynchronously as JsonValue and write out top facts for each country

                response.Content.ReadAsStringAsync().ContinueWith(

                    readTask =>

                    {

                        Console.WriteLine(readTask.Result + " time:==>" + DateTime.Now);

                    });

            });

        }

    }

}