using System.IO;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace Admin.Core.Common
{
    public class HttpHelper
    {
        public static string Get(string serviceAddress)
        { 
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceAddress);
            request.Method = "GET";
            request.ContentType = "text/html;charset=UTF-8";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
            string retString = myStreamReader.ReadToEnd();
            myStreamReader.Close();
            myResponseStream.Close(); 
            return retString;
        }
        public static async Task<string> GetAsync(string serviceAddress)
        { 
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceAddress);
            request.Method = "GET";
            request.ContentType = "text/html;charset=UTF-8";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.UTF8);
            string retString = await myStreamReader.ReadToEndAsync();
            myStreamReader.Close();
            myResponseStream.Close(); 
            return retString;
        }

        public static string Post(string serviceAddress, string strContent = null)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceAddress);
            request.Method = "POST";
            request.ContentType = "application/json";
            //判断有无POST内容
            if (!string.IsNullOrWhiteSpace(strContent))
            {
                using (StreamWriter dataStream = new StreamWriter(request.GetRequestStream()))
                {
                    dataStream.Write(strContent);
                    dataStream.Close();
                }
            }
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            string encoding = response.ContentEncoding;
            if (encoding.Length < 1)
            {
                encoding = "UTF-8"; //默认编码  
            }
            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding));
            string retString = reader.ReadToEnd();
            return retString;
        }

        public static async Task<string> PostAsync(string serviceAddress, string strContent = null)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceAddress);
            request.Method = "POST";
            request.ContentType = "application/json";
            //判断有无POST内容
            if (!string.IsNullOrWhiteSpace(strContent))
            {
                using (StreamWriter dataStream = new StreamWriter(request.GetRequestStream()))
                {
                    dataStream.Write(strContent);
                    dataStream.Close();
                }
            }
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            string encoding = response.ContentEncoding;
            if (encoding.Length < 1)
            {
                encoding = "UTF-8"; //默认编码  
            }
            StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding(encoding));
            string retString = await reader.ReadToEndAsync();
            return retString;
        }
    }


}