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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.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.http.DefaultFullHttpRequest;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpHeaders.Names;
import io.netty.handler.codec.http.HttpHeaders.Values;
import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.HttpVersion;

import java.net.URI;
import java.nio.ByteBuffer;

/**
 * 
 * Performs client side opening and closing handshakes for web socket specification version draft-ietf-hybi-thewebsocketprotocol-
 * 00
 * 
 * 
 * A very large portion of this code was taken from the Netty 3.2 HTTP example.
 * 
 */
public class WebSocketClientHandshaker00 extends WebSocketClientHandshaker {

    private ByteBuf expectedChallengeResponseBytes;

    /**
     * Constructor specifying the destination web socket location and version to initiate
     *
     * @param webSocketURL
     *            URL for web socket communications. e.g "ws://myhost.com/mypath". Subsequent web socket frames will be
     *            sent to this URL.
     * @param version
     *            Version of web socket specification to use to connect to the server
     * @param subprotocol
     *            Sub protocol request sent to the server.
     * @param customHeaders
     *            Map of custom headers to add to the client request
     * @param maxFramePayloadLength
     *            Maximum length of a frame's payload
     */
    public WebSocketClientHandshaker00(URI webSocketURL, WebSocketVersion version, String subprotocol,
            HttpHeaders customHeaders, int maxFramePayloadLength) {
        super(webSocketURL, version, subprotocol, customHeaders, maxFramePayloadLength);
    }

    /**
     * 
     * Sends the opening request to the server:
     * 
     *
     *      * GET /demo HTTP/1.1
     * Upgrade: WebSocket
     * Connection: Upgrade
     * Host: example.com
     * Origin: http://example.com
     * Sec-WebSocket-Key1: 4 @1  46546xW%0l 1 5
     * Sec-WebSocket-Key2: 12998 5 Y3 1  .P00
     *
     * ^n:ds[4U
     * 
     *
     */
    @Override
    protected FullHttpRequest newHandshakeRequest() {
        // Make keys
        int spaces1 = WebSocketUtil.randomNumber(1, 12);
        int spaces2 = WebSocketUtil.randomNumber(1, 12);

        int max1 = Integer.MAX_VALUE / spaces1;
        int max2 = Integer.MAX_VALUE / spaces2;

        int number1 = WebSocketUtil.randomNumber(0, max1);
        int number2 = WebSocketUtil.randomNumber(0, max2);

        int product1 = number1 * spaces1;
        int product2 = number2 * spaces2;

        String key1 = Integer.toString(product1);
        String key2 = Integer.toString(product2);

        key1 = insertRandomCharacters(key1);
        key2 = insertRandomCharacters(key2);

        key1 = insertSpaces(key1, spaces1);
        key2 = insertSpaces(key2, spaces2);

        byte[] key3 = WebSocketUtil.randomBytes(8);

        ByteBuffer buffer = ByteBuffer.allocate(4);
        buffer.putInt(number1);
        byte[] number1Array = buffer.array();
        buffer = ByteBuffer.allocate(4);
        buffer.putInt(number2);
        byte[] number2Array = buffer.array();

        byte[] challenge = new byte[16];
        System.arraycopy(number1Array, 0, challenge, 0, 4);
        System.arraycopy(number2Array, 0, challenge, 4, 4);
        System.arraycopy(key3, 0, challenge, 8, 8);
        expectedChallengeResponseBytes = Unpooled.wrappedBuffer(WebSocketUtil.md5(challenge));

        // Get path
        URI wsURL = uri();
        String path = wsURL.getPath();
        if (wsURL.getQuery() != null && !wsURL.getQuery().isEmpty()) {
            path = wsURL.getPath() + '?' + wsURL.getQuery();
        }

        if (path == null || path.isEmpty()) {
            path = "/";
        }

        // Format request
        FullHttpRequest request = new DefaultFullHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, path);
        HttpHeaders headers = request.headers();
        headers.add(Names.UPGRADE, Values.WEBSOCKET)
               .add(Names.CONNECTION, Values.UPGRADE)
               .add(Names.HOST, wsURL.getHost());

        int wsPort = wsURL.getPort();
        String originValue = "http://" + wsURL.getHost();
        if (wsPort != 80 && wsPort != 443) {
            // if the port is not standard (80/443) its needed to add the port to the header.
            // See http://tools.ietf.org/html/rfc6454#section-6.2
            originValue = originValue + ':' + wsPort;
        }

        headers.add(Names.ORIGIN, originValue)
               .add(Names.SEC_WEBSOCKET_KEY1, key1)
               .add(Names.SEC_WEBSOCKET_KEY2, key2);

        String expectedSubprotocol = expectedSubprotocol();
        if (expectedSubprotocol != null && !expectedSubprotocol.isEmpty()) {
            headers.add(Names.SEC_WEBSOCKET_PROTOCOL, expectedSubprotocol);
        }

        if (customHeaders != null) {
            headers.add(customHeaders);
        }

        // Set Content-Length to workaround some known defect.
        // See also: http://www.ietf.org/mail-archive/web/hybi/current/msg02149.html
        headers.set(Names.CONTENT_LENGTH, key3.length);
        request.content().writeBytes(key3);
        return request;
    }

    /**
     * 
     * Process server response:
     * 
     *
     *      * HTTP/1.1 101 WebSocket Protocol Handshake
     * Upgrade: WebSocket
     * Connection: Upgrade
     * Sec-WebSocket-Origin: http://example.com
     * Sec-WebSocket-Location: ws://example.com/demo
     * Sec-WebSocket-Protocol: sample
     *
     * 8jKS'y:G*Co,Wxa-
     * 
     *
     * @param response
     *            HTTP response returned from the server for the request sent by beginOpeningHandshake00().
     * @throws WebSocketHandshakeException
     */
    @Override
    protected void verify(FullHttpResponse response) {
        final HttpResponseStatus status = new HttpResponseStatus(101, "WebSocket Protocol Handshake");

        if (!response.getStatus().equals(status)) {
            throw new WebSocketHandshakeException("Invalid handshake response getStatus: " + response.getStatus());
        }

        HttpHeaders headers = response.headers();

        String upgrade = headers.get(Names.UPGRADE);
        if (!Values.WEBSOCKET.equalsIgnoreCase(upgrade)) {
            throw new WebSocketHandshakeException("Invalid handshake response upgrade: "
                    + upgrade);
        }

        String connection = headers.get(Names.CONNECTION);
        if (!Values.UPGRADE.equalsIgnoreCase(connection)) {
            throw new WebSocketHandshakeException("Invalid handshake response connection: "
                    + connection);
        }

        ByteBuf challenge = response.content();
        if (!challenge.equals(expectedChallengeResponseBytes)) {
            throw new WebSocketHandshakeException("Invalid challenge");
        }
    }

    private static String insertRandomCharacters(String key) {
        int count = WebSocketUtil.randomNumber(1, 12);

        char[] randomChars = new char[count];
        int randCount = 0;
        while (randCount < count) {
            int rand = (int) (Math.random() * 0x7e + 0x21);
            if (0x21 < rand && rand < 0x2f || 0x3a < rand && rand < 0x7e) {
                randomChars[randCount] = (char) rand;
                randCount += 1;
            }
        }

        for (int i = 0; i < count; i++) {
            int split = WebSocketUtil.randomNumber(0, key.length());
            String part1 = key.substring(0, split);
            String part2 = key.substring(split);
            key = part1 + randomChars[i] + part2;
        }

        return key;
    }

    private static String insertSpaces(String key, int spaces) {
        for (int i = 0; i < spaces; i++) {
            int split = WebSocketUtil.randomNumber(1, key.length() - 1);
            String part1 = key.substring(0, split);
            String part2 = key.substring(split);
            key = part1 + ' ' + part2;
        }

        return key;
    }

    @Override
    protected WebSocketFrameDecoder newWebsocketDecoder() {
        return new WebSocket00FrameDecoder(maxFramePayloadLength());
    }

    @Override
    protected WebSocketFrameEncoder newWebSocketEncoder() {
        return new WebSocket00FrameEncoder();
    }
}