我如何获得的TcpListener接受多个连接,并分别与每个人的工作? [英] how do i get TcpListener to accept multiple connections and work with each one individually?
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问题描述
我有一个SMTP侦听器,效果很好,但只能接受一个连接。我的C#code是下面,我运行它作为一项服务。我的目标是有它runnign在服务器上,解析发送给它的多个SMTP邮件。
目前它分析了第一条消息,并停止工作。我该怎么去接受第二次,第三次,第四次...... SMTP邮件并处理它喜欢它做的第一?
这是我的code:
使用系统;
使用System.Collections.Generic;
使用System.Linq的;
使用System.Text;
使用的System.Net.Sockets;
使用System.Net;
使用System.IO;
命名空间SMTP_Listener
{
类节目
{
静态无效的主要(字串[] args)
{
的TcpListener监听器=新的TcpListener(IPAddress.Any,8000);
TcpClient的客户端;
的NetworkStream纳秒;
listener.Start();
Console.WriteLine(等待连接......);
客户= listener.AcceptTcpClient();
Console.WriteLine(连接接受!);
纳秒= client.GetStream();
使用(StreamWriter的作家=新的StreamWriter(NS))
{
writer.WriteLine(220本地主机SMTP服务器准备好了。);
writer.Flush();
使用(StreamReader的读者=新的StreamReader(NS))
{
串响应= reader.ReadLine();
如果(response.StartsWith(HELO)及!&安培;!response.StartsWith(EHLO))
{
writer.WriteLine(500未知的命令);
writer.Flush();
ns.Close();
返回;
}
字符串远程= response.Replace(HELO的String.Empty).Replace(EHLO的String.Empty).Trim();
writer.WriteLine(250本地主机你好+遥控);
writer.Flush();
响应= reader.ReadLine();
如果(response.StartsWith(MAIL FROM:!))
{
writer.WriteLine(500未知的命令);
writer.Flush();
ns.Close();
返回;
}
远程= response.Replace(RCPT TO:,的String.Empty).Trim();
writer.WriteLine(250+遥控器+我喜欢这个家伙呢!);
writer.Flush();
响应= reader.ReadLine();
如果(!response.StartsWith(RCPT TO:))
{
writer.WriteLine(500未知的命令);
writer.Flush();
ns.Close();
返回;
}
远程= response.Replace(MAIL FROM:,的String.Empty).Trim();
writer.WriteLine(250+遥控器+我喜欢这个家伙!);
writer.Flush();
响应= reader.ReadLine();
如果(response.Trim()!=DATA)
{
writer.WriteLine(500未知的命令);
writer.Flush();
ns.Close();
返回;
}
writer.WriteLine(上独占一行354输入信息完成后,输入\\。);
writer.Flush();
INT计数器= 0;
StringBuilder的消息=新的StringBuilder();
而((响应= reader.ReadLine()。修剪())!=)。
{
message.AppendLine(响应);
反++;
如果(计数器== 1000000)
{
ns.Close();
返回; //真的吗?在信息1万行?
}
}
writer.WriteLine(250行);
writer.Flush();
ns.Close();
//将信息到数据库
Console.WriteLine(收到的消息:);
Console.WriteLine(message.ToString());
}
}
Console.ReadKey();
}
}
}
解决方案
你可以将你的大部分code到一个单独的线程:
静态无效的主要(字串[] args)
{
的TcpListener监听器=新的TcpListener(IPAddress.Any,8000);
TcpClient的客户端;
listener.Start();
而(真)//添加你的退出标志在这里
{
客户= listener.AcceptTcpClient();
ThreadPool.QueueUserWorkItem(ThreadProc的,客户端);
}
}
私有静态无效ThreadProc的(obj对象)
{
VAR的客户=(TcpClient的)目标文件;
//做你的工作在这里
}
I have an SMTP listener that works well but is only able to receive one connection. My C# code is below and I am running it as a service. My goal is to have it runnign on a server and parsing multiple smtp messages sent to it.
currently it parses the first message and stops working. how can I get it to accept the 2nd, 3rd, 4th... SMTP message and process it like it does the first?
here is my code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Net;
using System.IO;
namespace SMTP_Listener
{
class Program
{
static void Main(string[] args)
{
TcpListener listener = new TcpListener(IPAddress.Any , 8000);
TcpClient client;
NetworkStream ns;
listener.Start();
Console.WriteLine("Awaiting connection...");
client = listener.AcceptTcpClient();
Console.WriteLine("Connection accepted!");
ns = client.GetStream();
using (StreamWriter writer = new StreamWriter(ns))
{
writer.WriteLine("220 localhost SMTP server ready.");
writer.Flush();
using (StreamReader reader = new StreamReader(ns))
{
string response = reader.ReadLine();
if (!response.StartsWith("HELO") && !response.StartsWith("EHLO"))
{
writer.WriteLine("500 UNKNOWN COMMAND");
writer.Flush();
ns.Close();
return;
}
string remote = response.Replace("HELO", string.Empty).Replace("EHLO", string.Empty).Trim();
writer.WriteLine("250 localhost Hello " + remote);
writer.Flush();
response = reader.ReadLine();
if (!response.StartsWith("MAIL FROM:"))
{
writer.WriteLine("500 UNKNOWN COMMAND");
writer.Flush();
ns.Close();
return;
}
remote = response.Replace("RCPT TO:", string.Empty).Trim();
writer.WriteLine("250 " + remote + " I like that guy too!");
writer.Flush();
response = reader.ReadLine();
if (!response.StartsWith("RCPT TO:"))
{
writer.WriteLine("500 UNKNOWN COMMAND");
writer.Flush();
ns.Close();
return;
}
remote = response.Replace("MAIL FROM:", string.Empty).Trim();
writer.WriteLine("250 " + remote + " I like that guy!");
writer.Flush();
response = reader.ReadLine();
if (response.Trim() != "DATA")
{
writer.WriteLine("500 UNKNOWN COMMAND");
writer.Flush();
ns.Close();
return;
}
writer.WriteLine("354 Enter message. When finished, enter \".\" on a line by itself");
writer.Flush();
int counter = 0;
StringBuilder message = new StringBuilder();
while ((response = reader.ReadLine().Trim()) != ".")
{
message.AppendLine(response);
counter++;
if (counter == 1000000)
{
ns.Close();
return; // Seriously? 1 million lines in a message?
}
}
writer.WriteLine("250 OK");
writer.Flush();
ns.Close();
// Insert "message" into DB
Console.WriteLine("Received message:");
Console.WriteLine(message.ToString());
}
}
Console.ReadKey();
}
}
}
解决方案
You can factor out most of your code into a separate thread:
static void Main(string[] args)
{
TcpListener listener = new TcpListener(IPAddress.Any , 8000);
TcpClient client;
listener.Start();
while (true) // Add your exit flag here
{
client = listener.AcceptTcpClient();
ThreadPool.QueueUserWorkItem(ThreadProc, client);
}
}
private static void ThreadProc(object obj)
{
var client = (TcpClient)obj;
// Do your work here
}
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