C# Http模拟POST等模式完成发包并查看服务器返回信息

【核心代码】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 Length
if (txtLog.Lines.Length > 3000) txtLog.Clear();

// == main ==
OutLog(string.Format("{2}: {0} {1}", sMode, sUrl, DateTime.Now.ToString("g")));
try
{
// init
req = 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();
}

// Response
HttpWebResponse 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);

// header
OutLog(".\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);

// body
OutLog(".\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);



}