com.sun.grizzly.websockets.ServerHandShake Maven / Gradle / Ivy

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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
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 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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package com.sun.grizzly.websockets;

import com.sun.grizzly.tcp.Response;
import com.sun.grizzly.tcp.http11.Constants;
import com.sun.grizzly.util.http.MimeHeaders;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;

public class ServerHandShake extends HandShake {
    private final static byte[] normalResponse = Charset.forName(
            "ASCII").encode("HTTP/1.1 101 Web Socket Protocol Handshake\r\n" +
            "Upgrade: WebSocket\r\nConnection: Upgrade\r\n" +
            "WebSocket-Origin: ").array();

    private final static byte[] locationResponse = Charset.
            forName("ASCII").encode("\r\nWebSocket-Location: ").array();

    private final static byte[] protocolResponse = Charset.
            forName("ASCII").encode("\r\nWebSocket-Protocol: ").array();

    public ServerHandShake(MimeHeaders headers, ClientHandShake client) {
        super(client.isSecure(), client.getOrigin(), client.getServerHostName(), client.getResourcePath());
        port = client.getPort();
    }

    public ByteBuffer generate() {
        try {
            final ByteArrayOutputStream bb = new ByteArrayOutputStream();
            bb.write(normalResponse);
            bb.write(getOrigin().getBytes("ASCII"));
            bb.write(locationResponse);
            bb.write(getLocation().getBytes("ASCII"));
            String protocol = getProtocol();
            if (protocol != null) {
                bb.write(protocolResponse);
                bb.write(protocol.getBytes("ASCII"));
            }
            bb.write(Constants.CRLF_BYTES);
            bb.write(Constants.CRLF_BYTES);
            ByteBuffer buffer = ByteBuffer.allocate(bb.size());
            buffer.put(bb.toByteArray());
            buffer.flip();
            return buffer;
        } catch (IOException e) {
            throw new RuntimeException(e.getMessage(), e);
        }
    }

    public void prepare(Response response) {
        response.setStatus(101);
        response.setMessage("Web Socket Protocol Handshake");
        response.setHeader("Upgrade", "WebSocket");
        response.setHeader("Connection", "Upgrade");
        response.setHeader("WebSocket-Origin", getOrigin());
        response.setHeader("WebSocket-Location", getLocation());
        if(getProtocol() != null) {
            response.setHeader("WebSocket-Protocol", getProtocol());
        }
        response.suspend();
    }
}