using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Net;
using System.Net.Cache;namespace TestHttpPost
{public partial class FrmTestHttpPost : Form{private EncodingInfo[] _Encodings = null;    // 编码集合.private Encoding _ResEncoding = null;    // 回应的编码.public FrmTestHttpPost(){InitializeComponent();}/// <summary>/// 根据BodyName创建Encoding对象。/// </summary>/// <param name="bodyname">与邮件代理正文标记一起使用的当前编码的名称。</param>/// <returns>返回Encoding对象。若没有匹配的BodyName，便返回null。</returns>public static Encoding Encoding_FromBodyName(string bodyname){if (string.IsNullOrEmpty(bodyname)) return null;try{foreach (EncodingInfo ei in Encoding.GetEncodings()){Encoding e = ei.GetEncoding();if (0 == string.Compare(bodyname, e.BodyName, true)){return e;}}}catch{}return null;}/// <summary>/// 输出日志文本./// </summary>/// <param name="s">日志文本</param>private void OutLog(string s){txtLog.AppendText(s + Environment.NewLine);txtLog.ScrollToCaret();}private void OutLog(string format, params object[] args){OutLog(string.Format(format, args));}private void FrmTestHttpPost_Load(object sender, EventArgs e){// Http方法cboMode.SelectedIndex = 1;    // POST// 回应的编码
            cboResEncoding.Items.Clear();_Encodings = Encoding.GetEncodings();cboResEncoding.DataSource = _Encodings;cboResEncoding.DisplayMember = "DisplayName";_ResEncoding = Encoding.UTF8;cboResEncoding.SelectedIndex = cboResEncoding.FindStringExact(_ResEncoding.EncodingName);}private void btnGo_Click(object sender, EventArgs e){Encoding myEncoding = Encoding.UTF8;string sMode = (string)cboMode.SelectedItem;string sUrl = txtUrl.Text;string sPostData = txtPostData.Text;string sContentType = "application/x-www-form-urlencoded";HttpWebRequest req;// Log Lengthif (txtLog.Lines.Length > 3000) txtLog.Clear();// == main ==OutLog(string.Format("{2}: {0} {1}", sMode, sUrl, DateTime.Now.ToString("g")));try{// initreq = HttpWebRequest.Create(sUrl) as HttpWebRequest;req.Method = sMode;req.Accept = "*/*";req.KeepAlive = false;req.CachePolicy = new HttpRequestCachePolicy(HttpRequestCacheLevel.NoCacheNoStore);if (0 == string.Compare("POST", sMode)){byte[] bufPost = myEncoding.GetBytes(sPostData);req.ContentType = sContentType;req.ContentLength = bufPost.Length;Stream newStream = req.GetRequestStream();newStream.Write(bufPost, 0, bufPost.Length);newStream.Close();}// ResponseHttpWebResponse res = req.GetResponse() as HttpWebResponse;try{OutLog("Response.ContentLength:\t{0}", res.ContentLength);OutLog("Response.ContentType:\t{0}", res.ContentType);OutLog("Response.CharacterSet:\t{0}", res.CharacterSet);OutLog("Response.ContentEncoding:\t{0}", res.ContentEncoding);OutLog("Response.IsFromCache:\t{0}", res.IsFromCache);OutLog("Response.IsMutuallyAuthenticated:\t{0}", res.IsMutuallyAuthenticated);OutLog("Response.LastModified:\t{0}", res.LastModified);OutLog("Response.Method:\t{0}", res.Method);OutLog("Response.ProtocolVersion:\t{0}", res.ProtocolVersion);OutLog("Response.ResponseUri:\t{0}", res.ResponseUri);OutLog("Response.Server:\t{0}", res.Server);OutLog("Response.StatusCode:\t{0}\t# {1}", res.StatusCode, (int)res.StatusCode);OutLog("Response.StatusDescription:\t{0}", res.StatusDescription);// headerOutLog(".\t#Header:");    // 头.for (int i = 0; i < res.Headers.Count; ++i){OutLog("[{2}] {0}:\t{1}", res.Headers.Keys[i], res.Headers[i], i);}// 找到合适的编码Encoding encoding = null;//encoding = Encoding_FromBodyName(res.CharacterSet);    // 后来发现主体部分的字符集与Response.CharacterSet不同.//if (null == encoding) encoding = myEncoding;encoding = _ResEncoding;System.Diagnostics.Debug.WriteLine(encoding);// bodyOutLog(".\t#Body:");    // 主体.using (Stream resStream = res.GetResponseStream()){using (StreamReader resStreamReader = new StreamReader(resStream, encoding)){OutLog(resStreamReader.ReadToEnd());}}OutLog(".\t#OK.");    // 成功.
                }finally{res.Close();}}catch (Exception ex){OutLog(ex.ToString());}OutLog(string.Empty);}private void cboResEncoding_SelectedIndexChanged(object sender, EventArgs e){EncodingInfo ei = cboResEncoding.SelectedItem as EncodingInfo;if (null == ei) return;_ResEncoding = ei.GetEncoding();}}
}