ModernConnector

Library like J2ME's Connector.open() but with TLS 1.2 automatically.

Usage

HTTPS:

// Somewhere
private static byte[] readAll(InputStream in, int max) throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    byte[] buf = new byte[512];
    int total = 0;
    while (true) {
        int want = Math.min(buf.length, max - total);
        if (want <= 0) break;
        int n = in.read(buf, 0, want);
        if (n == -1) break;
        bos.write(buf, 0, n);
        total += n;
    }
    return bos.toByteArray();
}

HttpConnection hc = (HttpConnection) ModernConnector.open("https://cloudflare.com/cdn-cgi/trace");
hc.setRequestMethod(HttpConnection.GET);
hc.setRequestProperty("Accept", "*/*");

// 4) Get code (forces the send), then read body
int code = hc.getResponseCode();
if (code < 200 || code >= 300) {
    throw new IOException("HTTP " + code + " " + hc.getResponseMessage());
}

InputStream in = hc.openInputStream();
String output = new String(readAll(in, Integer.MAX_VALUE));
System.out.println(output);

WebSocket:

WebSocketClient ws = (WebSocketClient) ModernConnector.open("wss://gateway.discord.gg/");

Runnable myRunnable;
myRunnable = new Runnable() {
    public void run() {
        while (true) {
            try {
                String message = ws.receiveMessageString(); // ws.receiveMessageBinary to get binary data instead
                System.out.println(message);
            } catch (IOException ex) {
                ex.printStackTrace();
                break;
            }

        }
    }
};

Thread thread = new Thread(myRunnable);
thread.start();

TLS:

// Too lazy to write this out right now, its the exact same as it would be but replace Connector with ModernConnector

No such class java.*

This library requires that your application use proguard to mangle classes. In the future I'll change the build process so its mangled for you automatically

The Elephant in the Room

If you want to use ModernConnector for ports 80/443/8080, your app WILL need a code signing signature or some way to bypass codesigning

Certificate validation

It simply does not exist. This library currently takes care of encryption but will not verify the remote server. It cannot be considered secure for that reason, but it can let you connect to secure services.

Building

Use netbeans 8.2 with Mobility and the proper j2me sdk setup. If that sounds awful its because it is. I should fix this eventually.