using System;
using System.IO;
using System.Net;
using System.Text;
using System.Web;

namespace BatchService.Framework.Utility
{
    public class HttpHelper
    {
        public static string PostHttp(string url, string body)
        {
            return PostHttp(url, body, "application/x-www-form-urlencoded");
        }

        //body是要传递的参数,格式"roleId=1&uid=2"
        //post的cotentType填写:
        //"application/x-www-form-urlencoded"
        //soap填写:"text/xml; charset=utf-8"
        public static string PostHttp(string url, string body, string contentType, string token = "")
        {
            LogHelper.Debug(url);
            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
            httpWebRequest.ContentType = contentType;
            httpWebRequest.Method = "POST";
            DateTime date1 = DateTime.Now;
            httpWebRequest.Timeout = 20000;
            byte[] btBodys = Encoding.UTF8.GetBytes(body);
            httpWebRequest.ContentLength = btBodys.Length;

            httpWebRequest.Headers.Add("Token", token);

            Stream newStream = httpWebRequest.GetRequestStream();
            newStream.Write(btBodys, 0, btBodys.Length);
            newStream.Close();
            HttpWebResponse httpWebResponse;
            DateTime date2 = DateTime.Now;
            try
            {
                httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
            }
            catch (WebException ex)
            {
                LogHelper.Error(ex.ToString());
                httpWebResponse = (HttpWebResponse)ex.Response;
                StreamReader sr = new StreamReader(httpWebResponse.GetResponseStream());
                var strHtml = sr.ReadToEnd();
                LogHelper.Error(strHtml);
                throw ex;
            }
            StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream());
            string responseContent = streamReader.ReadToEnd();

            httpWebResponse.Close();
            streamReader.Close();
            httpWebRequest.Abort();
            httpWebResponse.Close();

            return responseContent;
        }



        public static string GetHttp(string url, HttpContext httpContext)
        {
            string queryString = "?";

            //foreach (string key in httpContext.Request.QueryString.AllKeys)
            //{
            //    queryString += key + "=" + httpContext.Request.QueryString[key] + "&";
            //}

            queryString = queryString.Substring(0, queryString.Length - 1);

            HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url + queryString);

            //httpWebRequest.ContentType = "application/json";
            httpWebRequest.Method = "GET";
            httpWebRequest.Timeout = 20000;
            httpWebRequest.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
            string responseContent = "";
            using (WebResponse wr = httpWebRequest.GetResponse())
            {
                Stream stream = wr.GetResponseStream();
                byte[] buf = new byte[1024];
                while (true)
                {
                    int len = stream.Read(buf, 0, buf.Length);
                    if (len <= 0)//[2011-8-22]  修改len < 0 =》 len <= 0 解决死循环
                        break;
                    responseContent += Encoding.UTF8.GetString(buf, 0, len);
                }
            }
            //HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
            //StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream());
            //string responseContent = streamReader.ReadToEnd();
            //httpWebResponse.Close(); 
            //streamReader.Close();

            return responseContent;
        }
        public static MemoryStream GetImage(string url)
        {
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url);
            myRequest.Method = "GET";
            MemoryStream ms = null;
            HttpWebResponse myResponse = null;
            try
            {
                myResponse = (HttpWebResponse)myRequest.GetResponse();
                StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8);
                Stream stream = myResponse.GetResponseStream();

                #region 保存下载图片


                Byte[] buffer = new Byte[myResponse.ContentLength];
                int offset = 0, actuallyRead = 0;
                do
                {
                    actuallyRead = stream.Read(buffer, offset, buffer.Length - offset);
                    offset += actuallyRead;
                }
                while (actuallyRead > 0);
                ms = new MemoryStream(buffer);
                byte[] buffurPic = ms.ToArray();
                //System.IO.File.WriteAllBytes(pathName, buffurPic);
                #endregion

                myResponse.Close();
                stream.Close();
                //fileStream.Close();
            }
            //异常请求  
            catch (WebException ex)
            {
                LogHelper.Error(ex.ToString());
            }
            return ms;
        }

        public static string GetIPAddress()
        {
            if (HttpContext.Current == null)
            {
                return "";
            }
            string userHostAddress = HttpContext.Current.Request.UserHostAddress;

            if (string.IsNullOrEmpty(userHostAddress))
            {
                userHostAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
            }

            //最后判断获取是否成功，并检查IP地址的格式（检查其格式非常重要）
            if (!string.IsNullOrEmpty(userHostAddress) && IsIP(userHostAddress))
            {
                return userHostAddress;
            }
            return "127.0.0.1";
        }
        /// <summary>
        /// 检查IP地址格式
        /// </summary>
        /// <param name="ip"></param>
        /// <returns></returns>
        public static bool IsIP(string ip)
        {
            return System.Text.RegularExpressions.Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
        }
    }
}