using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace DG.Tool
{
    public static class HttpHelper
    {
        public static string PostAjaxData(string url, string param, Encoding encoding)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.ContentType = "application/json;charet=utf-8";
            request.Headers.Add("dataType", "json");
            request.Headers.Add("type", "post");
            byte[] data = encoding.GetBytes(param);

            using (BinaryWriter reqStream = new BinaryWriter(request.GetRequestStream()))
            {
                reqStream.Write(data, 0, data.Length);
            }
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            {
                StreamReader reader = new StreamReader(response.GetResponseStream(), encoding);
                string result = reader.ReadToEnd();
                return result;
            }
        }

        public static T PostAjaxData<T>(string url, string param, Encoding encoding)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "POST";
            request.ContentType = "application/json;charet=utf-8";
            request.Headers.Add("dataType", "json");
            request.Headers.Add("type", "post");
            byte[] data = encoding.GetBytes(param);

            using (BinaryWriter reqStream = new BinaryWriter(request.GetRequestStream()))
            {
                reqStream.Write(data, 0, data.Length);
            }
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            {
                StreamReader reader = new StreamReader(response.GetResponseStream(), encoding);
                string result = reader.ReadToEnd();
                return JsonHelper.FromJson<T>(result);
            }
        }

        /// <summary>
        /// 获取数据
        /// </summary>
        /// <param name="url"></param>
        /// <param name="encoding"></param>
        /// <returns></returns>
        public static string GetData(string Url, string RequestPara, Encoding encoding)
        {
            RequestPara = RequestPara.IndexOf('?') > -1 ? (RequestPara) : ("?" + RequestPara);

            WebRequest hr = HttpWebRequest.Create(Url + RequestPara);

            byte[] buf = encoding.GetBytes(RequestPara);
            hr.Method = "GET";

            System.Net.WebResponse response = hr.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("utf-8"));
            string ReturnVal = reader.ReadToEnd();
            reader.Close();
            response.Close();

            return ReturnVal;
        }

        /// <summary>
        /// 获取数据
        /// </summary>
        /// <param name="url"></param>
        /// <param name="encoding"></param>
        /// <returns></returns>
        public static T GetData<T>(string Url, string RequestPara, Encoding encoding)
        {
            RequestPara = RequestPara.IndexOf('?') > -1 ? (RequestPara) : ("?" + RequestPara);

            WebRequest hr = HttpWebRequest.Create(Url + RequestPara);

            byte[] buf = encoding.GetBytes(RequestPara);
            hr.Method = "GET";

            System.Net.WebResponse response = hr.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("utf-8"));
            string ReturnVal = reader.ReadToEnd();
            reader.Close();
            response.Close();
            return JsonHelper.FromJson<T>(ReturnVal);
        }
    }
}