我正在尝试做一个简单的Gmail客户端。问题是我得到一个非常奇怪的回应;其实我根本没有得到SslStream.read
的回应。首先,当我以客户端身份连接到Gmail服务器时,它的工作原理非常完美(Connect()
方法),但是当我尝试从电子邮件中获取号码时,再次使用SslStream.read
和leerMensaje()
方法,它变得很奇怪,只是停止运行,网页卡住加载。没有得到SslStream.read的响应
这里是我工作类:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Net;
using System.Net.Sockets;
using System.Net.Security;
using System.Text;
using System.Net.Mail;
namespace GmailClient
{
public class GmailPop
{
private SslStream sslStream;
private String user;
private String pass;
public GmailPop(String user, String pass)
{
this.user = user;
this.pass = pass;
}
public bool Connect()
{
String response;
byte[] buffer = new byte[2048];
int bytes = -1;
TcpClient server = new TcpClient("pop.gmail.com", 995);
sslStream = new SslStream(server.GetStream());
sslStream.AuthenticateAsClient("pop.gmail.com");
bytes = sslStream.Read(buffer, 0, buffer.Length);
response = Encoding.ASCII.GetString(buffer,0,bytes);
sslStream.Write(Encoding.ASCII.GetBytes("USER recent:" + user+"\r\n"));
bytes = sslStream.Read(buffer, 0, buffer.Length);
response = Encoding.ASCII.GetString(buffer,0,bytes);
if(response.StartsWith("+OK")){
sslStream.Write(Encoding.ASCII.GetBytes("PASS "+pass+"\r\n"));
bytes = sslStream.Read(buffer,0,buffer.Length);
response = Encoding.ASCII.GetString(buffer, 0, bytes);
return response.StartsWith("+OK");
}
return false;
}
public int numCorreos()
{
String res = escribirLeer("STAT");
String[] resA = res.Split(' ');
int num = Int32.Parse(resA[1]);
return num;
}
public String leerMensaje()
{
int bytes = -1;
byte[] buffer = new byte[2048];
String msg = "";
do
{
bytes = sslStream.Read(buffer, 0, buffer.Length);
msg += Encoding.ASCII.GetString(buffer, 0, bytes);
} while (bytes != 0);
return msg;
}
public void escribirMsg(String msg)
{
byte[] buffer = Encoding.ASCII.GetBytes(msg);
sslStream.Write(buffer);
sslStream.Flush();
}
public String escribirLeer(String msg)
{
escribirMsg(msg);
String respuesta = leerMensaje();
return respuesta;
}
}
}
这里是ASPX网页调用该方法:
GmailPop client;
protected void Page_Load(object sender, EventArgs e)
{
if (Session["user"] != null && Session["pass"] != null)
{
String user = Session["user"].ToString();
String pass = Session["pass"].ToString();
client = new GmailPop(user, pass);
if (client.Connect())
{
Session["active"] = true;
Response.Write(numCorreos());
}
else
{
Session.Remove("pass");
Response.Redirect("login.aspx?error=login");
}
}
else
{
Response.Redirect("login.aspx");
}
}
}
是的,我尝试了你所说的,实际上我在read方法的文档之前阅读,并且它返回读取的字节数,所以如果它在结束时应该返回0,问题是甚至在程序第一次达到该指令时调试程序,它只是在它运行该程序后立即停止调试。是一个很奇怪的行为。 – 2012-04-25 11:55:32
第一次调用Read()时挂起的原因是因为命令必须以“\ r \ n”结尾。你只是发送“STAT”,但需要发送“STAT \ r \ n”。我将编辑我的答案以反映这一点。但是我的原始答案仍然存在 - 因为当前代码仍然期望Read()返回0(除非连接已关闭,否则它不会),所以即使您正确发送命令,它仍然会挂起,但是在第二次调用Read()。 – Iridium 2012-04-25 13:05:51
谢谢你,我们有时候看不到的那些小聋人,因为你们正在上课后的午夜。再次感谢 – 2012-04-25 19:16:21