HTTP POST返回错误:417"期望失败

问题描述

此代码返回错误:417期望失败.为什么?谢谢！

this code Returns The Error: 417 "Expectation Failed.why?thank!!!

CookieContainer cookie=new CookieContainer();
		Encoding encoding=Encoding.GetEncoding("gb2312");
		void Button1Click(object sender, EventArgs e)
		{
			HttpWebRequest req=WebRequest.Create("http://reg.email.163.com/mailregAll/reg0.jsp?from=163mail_right") as HttpWebRequest;
			req.Method="GET";
			req.Accept="*/*";
			req.Referer="http://mail.163.com/";
			req.UserAgent="Mozilla/4.0";
			req.CookieContainer=cookie;
			req.KeepAlive=true;
			HttpWebResponse resp=req.GetResponse() as HttpWebResponse;
			Stream respStream=resp.GetResponseStream();
			StreamReader respReader=new StreamReader(respStream,encoding);
			string page=respReader.ReadToEnd();
			respStream.Close();
			respReader.Close();

			string imageUrl="http://reg.email.163.com/mailregAll/regv2/verifyCodeImg.jsp?t=";
			TimeSpan span=DateTime.Now-Convert.ToDateTime("1970-01-01");
			double tt=((span.TotalMilliseconds)/1000)-(8*3600);
			string time=tt.ToString();
			imageUrl+=time;
			req=WebRequest.Create(imageUrl) as HttpWebRequest;
			req.Method="GET";
			req.Accept="*/*";
			req.Referer="http://mail.163.com/";
			req.UserAgent="Mozilla/4.0";
			req.CookieContainer=cookie;
			req.KeepAlive=true;
			resp.Cookies=cookie.GetCookies(req.RequestUri);
			resp=req.GetResponse() as HttpWebResponse;
			respStream=resp.GetResponseStream();
			Image image=new Bitmap(respStream);
			pictureBox1.Image=image;
			respStream.Close();
		}

void Button2Click(object sender, EventArgs e)
		{
			HttpWebRequest req=WebRequest.Create("http://reg.email.163.com/mailregAll/createmail2.do") as HttpWebRequest;
			req.Method="POST";
//			req.Accept="application/json, text/javascript, */*";
			req.Referer="http://reg.email.163.com/mailregAll/reg0.jsp?from=163mail_right";
			req.UserAgent="Mozilla/4.0";
			req.ContentType="application/x-www-form-urlencoded";
			req.CookieContainer=cookie;
			req.KeepAlive=true;
			string postString="uname=ioriliaotest3&" +
				              "password=19850420&" +
				              "passwordconf=19850420" +
				              "&mobile=&verifycode="+
				               HttpUtility.UrlEncode(textBox1.Text,encoding)+
				              "&dmain=163.com&version=regvf1";
			byte[] postByte=Encoding.ASCII.GetBytes(postString);
			Stream reqStream=req.GetRequestStream();
			reqStream.Write(postByte,0,postByte.Length);
			reqStream.Close();
			//error in this
			HttpWebResponse resp=req.GetResponse() as HttpWebResponse;
			Stream respStream=resp.GetResponseStream();
			StreamReader respReader=new StreamReader(respStream,encoding);
			richTextBox1.AppendText(respReader.ReadToEnd());
			respStream.Close();
			respReader.Close();
		}

推荐答案

System.Net.ServicePointManager.Expect100Continue = false; 

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