using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Web;

namespace WindowsFormsApp1.utils
{
    class HttpUtil
    {
        static CookieContainer cookieContainer = new CookieContainer();
        //Get网络请求
        public static string HttpGet(String url, Dictionary<String,String> headerMap) {
            string retString = string.Empty;

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "GET";
            request.Timeout = 60000;
            //设置代理
            WebProxy proxy = new WebProxy();
            proxy.Address = new Uri("http://192.168.1.122:8888");
            request.Proxy = proxy;
            WebHeaderCollection headers = request.Headers;
            if (headerMap != null)
            {
                foreach (KeyValuePair<string, string> kvp in headerMap)
                {
                    headers.Add(kvp.Key + ":" + kvp.Value);
                }
            }
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader streamReader = new StreamReader(myResponseStream);
            retString = streamReader.ReadToEnd();
            streamReader.Close();
            myResponseStream.Close();
            return retString;
        }


        public static Stream HttpGetImage(String url)
        {
            string retString = string.Empty;

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.CookieContainer = cookieContainer;
            request.Method = "GET";
            request.Timeout = 60000;
            //设置代理
            WebProxy proxy = new WebProxy();
            proxy.Address = new Uri("http://192.168.1.122:8888");
            request.Proxy = proxy;
            WebHeaderCollection headers = request.Headers;
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            return myResponseStream;
        }

        //POST网络请求
        public static string HttpPost(String url, Dictionary<String, String> paramsMap,Dictionary<String, String> headerMap) {
            string retString = string.Empty;

            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.CookieContainer = cookieContainer;
            request.Method = "POST";
            request.Timeout = 60000;
            request.ContentType = "application/x-www-form-urlencoded";
            //设置代理
            WebProxy proxy = new WebProxy();
            proxy.Address = new Uri("http://192.168.1.122:8888");
            request.Proxy = proxy;
            WebHeaderCollection headers = request.Headers;
            if (headerMap != null)
            {
                foreach (KeyValuePair<string, string> kvp in headerMap)
                {
                    headers.Add(kvp.Key + ":" + kvp.Value);
                }
            }
            if (paramsMap != null) {
                StringBuilder buffer = new StringBuilder();
                foreach (KeyValuePair<string, string> kvp in paramsMap)
                {
                    buffer.AppendFormat("&{0}={1}", kvp.Key, UrlEncode(kvp.Value));
                }

                if (buffer.ToString().StartsWith("&"))
                    buffer.Remove(0,1);
                Encoding encoding = Encoding.UTF8;
                byte[] postData = encoding.GetBytes(buffer.ToString()); 
                request.ContentLength = postData.Length;
                Stream requestStream = request.GetRequestStream();
                requestStream.Write(postData, 0, postData.Length);
            }
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader streamReader = new StreamReader(myResponseStream);
            retString = streamReader.ReadToEnd();
            streamReader.Close();
            myResponseStream.Close();
            return retString;
        }


        public static string UrlEncode(string str){
         return   HttpUtility.UrlEncode(str);
                  //   StringBuilder sb = new StringBuilder();
                //byte[] byStr = System.Text.Encoding.UTF8.GetBytes(str);
                //for (int i = 0; i < byStr.Length; i++)
                //{
                //    sb.Append(@"%" + Convert.ToString(byStr[i], 16));
               // }
               // return (sb.ToString());
        }
    
    }
}