如何使用Java托管自己的SMTP服务器 [英] How do I host my own SMTP Server using Java
问题描述
因此，我想测试我自己的电子邮件客户端，以测试将模拟电子邮件发送到我自己计算机上的模拟地址，但是我正在努力将SMTP服务器代码实现为自己的电子邮件.
So i want to test my own Email Client to test sending mock emails to mock addresses on my own computer but I'm struggling on how to implement the SMTP Server code into my own.
到目前为止，我已经做到了，所以当我运行服务器和运行客户端时，它们都可以通过我的IP连接在一起，但是现在我正在努力为客户端在服务器中实现电子邮件部分与之沟通.
So far, i've got it so when i run the Server and i run the client, both of them can connect together on my IP, but now i'm struggling on implementing the email part in the server for the Client to communicate to.
整个项目的最终输出应如下所示:
The final output for the whole project should look a little something like this:
S: 220 [my ip]
C: HELLO [my ip]
S: 250 Hello email1@email1.com, pleased to meet you
C: MAIL FROM: <email1@email1.com>
S: 250 ok
C: RCPT TO: <email2@email2.com>
S: 250 ok
C: DATA
S: 354 End data with <CR><LF>.<CR><LF>
C: Hello ,
C: How are you today?
C: .
S: 250 ok Message accepted for delivery
C: QUIT
S: 221 [my ip] closing connection
当我在客户端代码中使用类似Google的smtp服务器 smtp.google.com 之类的东西时，我可以实现此输出，但是我想用自己的服务器对其进行测试.我只是不知道如何将smtp服务器代码实现为自己的代码.
When i use something like google's smtp server smtp.google.com in my client code, i can achieve this output, but i want to test it with my own server. I just don't know how to implement the smtp server code into my own code.
这是服务器代码:
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
public class TCPServer{
private ServerSocket server;
/**
* The TCPServer constructor initiate the socket
* @param ipAddress
* @param port
* @throws Exception
*/
public TCPServer(String ipAddress, int port) throws Exception {
if (ipAddress != null && !ipAddress.isEmpty())
this.server = new ServerSocket(port, 1, InetAddress.getByName(ipAddress));
else
this.server = new ServerSocket(0, 1, InetAddress.getLocalHost());
}
/**
* The listen method listen to incoming client's datagrams and requests
* @throws Exception
*/
private void listen() throws Exception {
// listen to incoming client's requests via the ServerSocket
//add your code here
String data = null;
Socket client = this.server.accept();
String clientAddress = client.getInetAddress().getHostAddress();
System.out.println("\r\nNew client connection from " + clientAddress);
// print received datagrams from client
//add your code here
BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
while ( (data = in.readLine()) != null ) {
System.out.println("\r\nMessage from " + clientAddress + ": " + data);
client.sendUrgentData(1);
}
}
public InetAddress getSocketAddress() {
return this.server.getInetAddress();
}
public int getPort() {
return this.server.getLocalPort();
}
public static void main(String[] args) throws Exception {
// set the server address (IP) and port number
//add your code here
String serverIP = "192.168.1.235"; // local IP address
int port = 8088;
if (args.length > 0) {
serverIP = args[0];
port = Integer.parseInt(args[1]);
}
// call the constructor and pass the IP and port
//add your code here
TCPServer server = new TCPServer(serverIP, port);
System.out.println("\r\nRunning Server: " +
"Host=" + server.getSocketAddress().getHostAddress() +
" Port=" + server.getPort());
server.listen();
}
}
这是我的客户代码:
import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
import java.util.Scanner;
public class ClientTester{
private Socket tcpSocket;
private InetAddress serverAddress;
private int serverPort;
private Scanner scanner;
/**
* @param serverAddress
* @param serverPort
* @throws Exception
*/
private ClientTester(InetAddress serverAddress, int serverPort) throws Exception {
this.serverAddress = serverAddress;
this.serverPort = serverPort;
//Initiate the connection with the server using Socket.
//For this, creates a stream socket and connects it to the specified port number at the specified IP address.
//add your code here
this.tcpSocket = new Socket(this.serverAddress, this.serverPort);
this.scanner = new Scanner(System.in);
}
/**
* The start method connect to the server and datagrams
* @throws IOException
*/
public static void main(String[] args) throws Exception {
// set the server address (IP) and port number
//add your code here
//IP: 192.168.1.235
//Port: 8088
InetAddress serverIP = InetAddress.getByName("192.168.1.235"); // local IP address
int port = 8088;
if (args.length > 0) {
serverIP = InetAddress.getByName(args[0]);
port = Integer.parseInt(args[1]);
}
// call the constructor and pass the IP and port
//add your code here
ClientTester client = new ClientTester(serverIP, port);
try{
client = new ClientTester(serverIP, port);
System.out.println("\r\n Connected to Server: " + client.tcpSocket.getInetAddress());
BufferedReader stdin;
stdin = new BufferedReader (new InputStreamReader (System.in));
InputStream is = client.tcpSocket.getInputStream ();
BufferedReader sockin;
sockin = new BufferedReader (new InputStreamReader (is));
OutputStream os = client.tcpSocket.getOutputStream();
PrintWriter sockout;
sockout = new PrintWriter (os, true);
System.out.println ("S:" + sockin.readLine ());
while (true){
System.out.print ("C:");
String cmd = stdin.readLine ();
sockout.println (cmd);
String reply = sockin.readLine ();
System.out.println ("S:" + reply);
if (cmd.toLowerCase ().startsWith ("data") &&
reply.substring (0, 3).equals ("354"))
{
do
{
cmd = stdin.readLine ();
if (cmd != null && cmd.length () > 1 &&
cmd.charAt (0) == '.')
cmd = "."; // Must be no chars after . char.
sockout.println (cmd);
if (cmd.equals ("."))
break;
}
while (true);
// Read a reply string from the SMTP server program.
reply = sockin.readLine ();
// Display the first line of this reply string.
System.out.println ("S:" + reply);
continue;
}
// If the QUIT command was entered, quit.
if (cmd.toLowerCase ().startsWith ("quit"))
break;
}
}
catch (IOException e)
{
System.out.println (e.toString ());
}
finally
{
try
{
// Attempt to close the client socket.
if (client != null)
client.tcpSocket.close();
}
catch (IOException e)
{
}
}
}
}
希望这对我想要实现的目标有一定意义
Hopefully this made some sense on what i want achieved
推荐答案
不要编写自己的SMTP服务器.那里有许多功能比您想要花费的时间更多的功能.我用这个:
Don't write your own SMTP Server. There are many out there that have way more features than you will want to spend your time implementing. I use this one:
https://github.com/gessnerfl/fake-smtp-server
它具有html界面，可让您查看其收到的电子邮件.
It has an html interface that will allow you to view the emails that it receives.
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