android ssl via proxy

[gjsbe]

Hi,
I would like to know if it's possibile to use api to connect using ssl and behind a proxy.
Also If there's an option to pass proxy username and password.
Thank you very much

[marci4]

Hello @gjsbe,

maybe this helps you.
https://github.com/TooTallNate/Java-WebSocket/wiki/Using-the-WebSocket-through-a-http-proxy

Greetings
marci4

[gjsbe]

Hi,
thank you very much, but there's another problem: if I have a proxy pac url how can I use it?

[gjsbe]

Sorry... I found a solution but I have a big problem... It doesn't work:

           SSLContext sslContext = SSLContext.getDefault();
           SSLSocketFactory sslFactory = sslContext.getSocketFactory();

            List<Proxy> proxies = ProxySelector.getDefault().select(new URI("wss://server.it:3333"));
            Proxy proxy;

            if(!proxies.isEmpty()) {

                if(!proxies.get(0).type().equals(Proxy.Type.DIRECT)) {
                    proxy = proxies.get(0);
                } else {
                    proxy = null;
                }

            } else {
                proxy = null;
            }

            if(proxy != null) {
                Socket proxySocket = new Socket(proxy);
                proxySocket.connect(new InetSocketAddress(host, port));
                ws.setSocket(sslFactory.createSocket(proxySocket, host, port, true));
            } else {
                ws.setSocket(sslFactory.createSocket());
            }

select method of proxyselector returns DIRECT for wss and ws protocols.
If I use https uri inside proxyselector select method returns HTTP Type Proxy, but when I use it inside proxy Socket it gives me Invalid proxy, because Android works only with SOCKS proxy (for sockets).

[marci4]

Hello @gjsbe,

Why is the example not working for you?
What kind of proxy do you wanna use?
I don't get what you are trying to achieve.. sorry

Greetings
marci4

[gjsbe]

Hi, the problem, from latest android sdk version, is that you cannot set http proxy for a Socket.
You need SOCKS Proxy, but for the ws we need http proxy connection.
So I writed my own proxy connection method (native).
Thank you anyway.

[marci4]

Hello @gjsbe,

Do you think you can share your solution to help other developers in the future?
Thank you!

Greetings
marci4

[gjsbe]

`

        Socket socket = new Socket();
        socket.connect(new InetSocketAddress(proxy.getHost(), proxy.getPort()));
        socket.setKeepAlive(true);
        socket.setTcpNoDelay(true);
        socket.setReceiveBufferSize(8192);

        String msg = "CONNECT " + dest.getHost() + ":" + dest.getPort() + " HTTP/1.0\r\n";

        msg += "User-Agent: APP/1.0\r\n" +
            "Keep-Alive: 300\r\n" +
            "Proxy-Connection: keep-alive\r\n\r\n";

        byte[] outData = msg.getBytes("ASCII");
        socket.getOutputStream().write(outData);
        socket.getOutputStream().flush();

        int readed;
        ByteArrayOutputStream responseStream = new ByteArrayOutputStream();
        byte[] readBytes = new byte[8192];

        while((readed = socket.getInputStream().read(readBytes)) > 0) {
            responseStream.write(readBytes, 0, readed);

            if(socket.getInputStream().available() == 0) {
                break;
            }
        }

        String response = new String(responseStream.toByteArray(), "ASCII");

`

If response is HTTP 200 then you can use proxy socket inside sslSocketFactory...
There are some things that I don't like, for example the while with available() if... is not a good implementation in some case.
bye

[marci4]

It is a starting point for many! :)
Thank you!

Issue solved. Closing it!

Greetings
marci4