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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.handler.codec.http.websocketx;

import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelPipeline;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpHeaderNames;
import io.netty.handler.codec.http.HttpRequest;
import io.netty.handler.codec.http.HttpResponse;
import io.netty.handler.ssl.SslHandler;

import static io.netty.handler.codec.http.HttpUtil.*;
import static io.netty.handler.codec.http.HttpMethod.*;
import static io.netty.handler.codec.http.HttpResponseStatus.*;
import static io.netty.handler.codec.http.HttpVersion.*;

/**
 * Handles the HTTP handshake (the HTTP Upgrade request) for {@link WebSocketServerProtocolHandler}.
 */
class WebSocketServerProtocolHandshakeHandler extends ChannelInboundHandlerAdapter {

    private final String websocketPath;
    private final String subprotocols;
    private final boolean allowExtensions;
    private final int maxFramePayloadSize;
    private final boolean allowMaskMismatch;
    private final boolean checkStartsWith;

    WebSocketServerProtocolHandshakeHandler(String websocketPath, String subprotocols,
            boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch) {
        this(websocketPath, subprotocols, allowExtensions, maxFrameSize, allowMaskMismatch, false);
    }

    WebSocketServerProtocolHandshakeHandler(String websocketPath, String subprotocols,
            boolean allowExtensions, int maxFrameSize, boolean allowMaskMismatch, boolean checkStartsWith) {
        this.websocketPath = websocketPath;
        this.subprotocols = subprotocols;
        this.allowExtensions = allowExtensions;
        maxFramePayloadSize = maxFrameSize;
        this.allowMaskMismatch = allowMaskMismatch;
        this.checkStartsWith = checkStartsWith;
    }

    @Override
    public void channelRead(final ChannelHandlerContext ctx, Object msg) throws Exception {
        final FullHttpRequest req = (FullHttpRequest) msg;
        if (isNotWebSocketPath(req)) {
            ctx.fireChannelRead(msg);
            return;
        }

        try {
            if (req.method() != GET) {
                sendHttpResponse(ctx, req, new DefaultFullHttpResponse(HTTP_1_1, FORBIDDEN));
                return;
            }

            final WebSocketServerHandshakerFactory wsFactory = new WebSocketServerHandshakerFactory(
                    getWebSocketLocation(ctx.pipeline(), req, websocketPath), subprotocols,
                            allowExtensions, maxFramePayloadSize, allowMaskMismatch);
            final WebSocketServerHandshaker handshaker = wsFactory.newHandshaker(req);
            if (handshaker == null) {
                WebSocketServerHandshakerFactory.sendUnsupportedVersionResponse(ctx.channel());
            } else {
                final ChannelFuture handshakeFuture = handshaker.handshake(ctx.channel(), req);
                handshakeFuture.addListener(new ChannelFutureListener() {
                    @Override
                    public void operationComplete(ChannelFuture future) throws Exception {
                        if (!future.isSuccess()) {
                            ctx.fireExceptionCaught(future.cause());
                        } else {
                            // Kept for compatibility
                            ctx.fireUserEventTriggered(
                                    WebSocketServerProtocolHandler.ServerHandshakeStateEvent.HANDSHAKE_COMPLETE);
                            ctx.fireUserEventTriggered(
                                    new WebSocketServerProtocolHandler.HandshakeComplete(
                                            req.uri(), req.headers(), handshaker.selectedSubprotocol()));
                        }
                    }
                });
                WebSocketServerProtocolHandler.setHandshaker(ctx.channel(), handshaker);
                ctx.pipeline().replace(this, "WS403Responder",
                        WebSocketServerProtocolHandler.forbiddenHttpRequestResponder());
            }
        } finally {
            req.release();
        }
    }

    private boolean isNotWebSocketPath(FullHttpRequest req) {
        return checkStartsWith ? !req.uri().startsWith(websocketPath) : !req.uri().equals(websocketPath);
    }

    private static void sendHttpResponse(ChannelHandlerContext ctx, HttpRequest req, HttpResponse res) {
        ChannelFuture f = ctx.channel().writeAndFlush(res);
        if (!isKeepAlive(req) || res.status().code() != 200) {
            f.addListener(ChannelFutureListener.CLOSE);
        }
    }

    private static String getWebSocketLocation(ChannelPipeline cp, HttpRequest req, String path) {
        String protocol = "ws";
        if (cp.get(SslHandler.class) != null) {
            // SSL in use so use Secure WebSockets
            protocol = "wss";
        }
        String host = req.headers().get(HttpHeaderNames.HOST);
        return protocol + "://" + host + path;
    }
}