using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;

namespace Lskj.Control.BrowserSetting2
{
    public static class HttpTools
    {
        public static CookieContainer cookie = new CookieContainer();           // 用于记录访问网页时cookie数据
        public static CookieCollection cookieCollection;

        private static string ContentType = string.Empty;// "application/x-www-form-urlencoded";
        private static string Accept = string.Empty;//"text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
        private static string UserAgent = string.Empty;//"Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14";
        public enum Method
        {
            POST = 0,
            GET = 1
        }
        public static void setting(string contentType, string accept, string userAgent)
        {
            ContentType = contentType;
            Accept = accept;
            UserAgent = userAgent;
        }
        /// <summary>
        /// post数据到指定的网址，获取cookie数据，和返回页
        /// </summary>
        public static HttpWebResponse Post(string url, string postData, Dictionary<string, string> pmsDic, Dictionary<string, string> headerDic, Method method)
        {
            return Post(url, postData, pmsDic, headerDic, method, out cookieCollection);
        }
        /// <summary>
        /// post数据到指定的网址，获取cookie数据，和返回页
        /// </summary>
        public static HttpWebResponse Post(string url, string postData, Dictionary<string, string> pmsDic, Dictionary<string, string> headerDic, Method method, out CookieCollection cookieCollection)
        {
            HttpWebResponse httpWebResponse = null;
            try
            {
                HttpWebRequest httpWebRequest;
                httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);

                httpWebRequest.CookieContainer = cookie;
                httpWebRequest.ContentType = ContentType;
                //httpWebRequest.Referer = url;
                httpWebRequest.Accept = Accept;
                httpWebRequest.UserAgent = UserAgent;
                httpWebRequest.Method = method == Method.POST ? "POST" : "GET";
                byte[] byteRequest = null;
                if (headerDic != null)
                {
                    foreach (var item in headerDic)
                    {
                        httpWebRequest.Headers.Add(item.Key, item.Value);
                    }
                }
                if (!string.IsNullOrEmpty(postData))
                {
                    byteRequest = Encoding.Default.GetBytes(postData);
                    httpWebRequest.ContentLength = byteRequest.Length;
                }
                else
                {
                    StringBuilder builder = new StringBuilder();
                    int i = 0;
                    foreach (var item in pmsDic)
                    {
                        if (i > 0)
                            builder.Append("&");
                        builder.AppendFormat("{0}={1}", item.Key, item.Value);
                        i++;
                    }
                    byteRequest = Encoding.UTF8.GetBytes(builder.ToString());
                    httpWebRequest.ContentLength = byteRequest.Length;
                }
                Stream stream = httpWebRequest.GetRequestStream();
                stream.Write(byteRequest, 0, byteRequest.Length);
                stream.Close();
                httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();

                cookieCollection = cookie.GetCookies(new Uri(url));
                return httpWebResponse;
            }
            catch (Exception)
            {
                cookieCollection = null;
                return httpWebResponse;
            }
        }
    }
}