com.sun.grizzly.websockets.ServerNetworkHandler 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
 * language governing permissions and limitations under the License.
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 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
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 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
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package com.sun.grizzly.websockets;

import com.sun.grizzly.BaseSelectionKeyHandler;
import com.sun.grizzly.arp.AsyncProcessorTask;
import com.sun.grizzly.http.ProcessorTask;
import com.sun.grizzly.http.servlet.HttpServletRequestImpl;
import com.sun.grizzly.http.servlet.HttpServletResponseImpl;
import com.sun.grizzly.http.servlet.ServletContextImpl;
import com.sun.grizzly.tcp.InputBuffer;
import com.sun.grizzly.tcp.Request;
import com.sun.grizzly.tcp.Response;
import com.sun.grizzly.tcp.http11.GrizzlyRequest;
import com.sun.grizzly.tcp.http11.GrizzlyResponse;
import com.sun.grizzly.tcp.http11.InternalOutputBuffer;
import com.sun.grizzly.util.SelectedKeyAttachmentLogic;
import com.sun.grizzly.util.WorkerThread;
import com.sun.grizzly.util.buf.ByteChunk;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.ByteBuffer;

public class ServerNetworkHandler implements NetworkHandler {
    private final Request request;
    private final Response response;
    private final InputBuffer inputBuffer;
    private final InternalOutputBuffer outputBuffer;
    private final ByteChunk chunk = new ByteChunk();
    private WebSocket socket;
    private SelectedKeyAttachmentLogic attachment;
    private AsyncProcessorTask asyncProcessorTask;

    public ServerNetworkHandler(Request req, Response resp) {
        request = req;
        response = resp;
        inputBuffer = req.getInputBuffer();
        outputBuffer = (InternalOutputBuffer) resp.getOutputBuffer();
    }

    public ServerNetworkHandler(final ProcessorTask task, final AsyncProcessorTask async, Request req, Response resp) {
        this(req, resp);
        asyncProcessorTask = async;
        attachment = new WebSocketSelectionKeyAttachment(this, task, async);
    }

    public WebSocket getWebSocket() {
        return socket;
    }

    public void setWebSocket(BaseWebSocket webSocket) {
        socket = webSocket;
    }

    protected void handshake(final boolean sslSupport) throws IOException, HandshakeException {
        final boolean secure = "https".equalsIgnoreCase(request.scheme().toString()) || sslSupport;

        final ClientHandShake clientHS = new ClientHandShake(request, secure);

        final ServerHandShake server;
        server = new ServerHandShake(clientHS.isSecure(), clientHS.getOrigin(),
                clientHS.getServerHostName(), clientHS.getPort(),
                clientHS.getResourcePath(), clientHS.getSubProtocol(),
                clientHS.getKey1(), clientHS.getKey2(), clientHS.getKey3());

        server.respond(response);
        socket.onConnect();
    }

    protected void readFrame() throws IOException {
        if (chunk.getLimit() == -1) {
            read();
        }
        while (socket.isConnected() && chunk.getLength() != 0) {
            final DataFrame dataFrame = DataFrame.read(this);
            if (dataFrame != null) {
                dataFrame.getType().respond(socket, dataFrame);
            } else {
                socket.close();
            }
        }
    }

    private void read() throws IOException {
        ByteChunk bytes = new ByteChunk(WebSocketEngine.INITIAL_BUFFER_SIZE);
        int count;
        while ((count = inputBuffer.doRead(bytes, request)) == WebSocketEngine.INITIAL_BUFFER_SIZE) {
            chunk.append(bytes);
        }

        if (count > 0) {
            chunk.append(bytes);
        }
    }

    public byte get() throws IOException {
        synchronized (chunk) {
            fill();
            return (byte) chunk.substract();
        }
    }

    public boolean peek(byte... bytes) throws IOException {
        synchronized (chunk) {
            fill();
            return chunk.startsWith(bytes);
        }
    }

    private void fill() throws IOException {
        if (chunk.getLength() == 0) {
            read();
        }
    }

    private void write(byte[] bytes) throws IOException {
        ByteChunk buffer = new ByteChunk(bytes.length);
        buffer.setBytes(bytes, 0, bytes.length);
        outputBuffer.doWrite(buffer, response);
        outputBuffer.flush();
    }

    public void send(DataFrame frame) throws IOException {
        write(frame.frame());
    }

    public HttpServletRequest getRequest() throws IOException {
        GrizzlyRequest r = new GrizzlyRequest();
        r.setRequest(request);
        return new WSServletRequestImpl(r);
    }

    public HttpServletResponse getResponse() throws IOException {
        GrizzlyResponse r = new GrizzlyResponse();
        r.setResponse(response);
        return new HttpServletResponseImpl(r);
    }

    public SelectedKeyAttachmentLogic getAttachment() {
        return attachment;
    }

    private static class WSServletRequestImpl extends HttpServletRequestImpl {
        public WSServletRequestImpl(GrizzlyRequest r) throws IOException {
            super(r);
            setContextImpl(new ServletContextImpl());
        }
    }

}