JavaMail:如何对不同的线程使用不同的SOCKS5? [英] JavaMail: How to use different SOCKS5 for different threads?

问题描述

我编写了一个多线程应用程序，该应用程序每个线程都从数据库连接到一些电子邮件帐户. 我知道JavaMail没有使用SOCKS5进行连接的任何选项，因此我决定通过System.setProperty方法使用它.但是此方法为整个应用程序设置了SOCKS5，我需要每个线程使用一个SOCKS5.我的意思是:

I wrote multithreading application which connects to some email accounts from database per thread. I know that JavaMail have no any options to use SOCKS5 for connection so I decided to use it via System.setProperty method. But this method sets SOCKS5 for whole application and I need to use one SOCKS5 per thread. I mean:

• 第一个线程:对bob @ localhost使用SOCKS 192.168.0.1:12345 连接
• 第二个线程:将SOCKS 192.168.0.20:12312用于 alice @ localhost连接
• 第三线程:使用SOCKS 192.168.12.:8080 for andrew @ localdomain进行连接

• first thread: uses SOCKS 192.168.0.1:12345 for bob@localhost to connect
• second thread: uses SOCKS 192.168.0.20:12312 for alice@localhost to connect
• third thread: uses SOCKS 192.168.12.:8080 for andrew@localdomain to connect

，依此类推.你能告诉我怎么做吗?

and so on. Can you tell me how to do this?

推荐答案

您需要使用所需的代理创建自己的套接字:

You need to create your own socket using the Proxy you want:

SocketAddress addr = new InetSocketAddress("socks.mydomain.com", 1080);
Proxy proxy = new Proxy(Proxy.Type.SOCKS, addr);
Socket socket = new Socket(proxy);
InetSocketAddress dest = new InetSocketAddress("smtp.foo.com", 25);
socket.connect(dest);

然后将其用于连接:

SMTPTransport transport = (SMTPTransport) session.getTransport("smtp");
transport.connect(socket);

棘手的问题是，如果您需要通过SMTP服务器进行身份验证才能发送邮件.在这种情况下，您必须创建javax.mail.Authenticator的子类并将其传递给Session.getInstance()方法:

The tricky bit is if you need authentication with the SMTP server to send mail. If that's the case, you have to create a subclass of javax.mail.Authenticator and pass it to the Session.getInstance() method:

MyAuthenticator authenticator = new MyAuthenticator();

Properties properties = new Properties();
properties.setProperty("mail.smtp.submitter",
                        authenticator.getPasswordAuthentication().getUserName());
properties.setProperty("mail.smtp.auth", "true");

Session session = Session.getInstance(properties, authenticator);

身份验证器的外观如下:

Where the authenticator looks like:

private class MyAuthenticator extends javax.mail.Authenticator 
{
    private PasswordAuthentication authentication;

    public Authenticator() 
    {
         String username = "auth-user";
         String password = "auth-password";
         authentication = new PasswordAuthentication(username, password);
    }

    protected PasswordAuthentication getPasswordAuthentication() 
    {
        return authentication;
    }
}

这都是未经测试的，但是我相信这是您必须做的所有事情.它至少应该使您走上正确的道路.

This is all untested, but I believe it's everything you have to do. It should at least put you on the right path.

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