io.netty.handler.codec.http.websocketx.WebSocketClientHandshakerFactory Maven / Gradle / Ivy

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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS 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.handler.codec.http.HttpHeaders;

import java.net.URI;

import static io.netty.handler.codec.http.websocketx.WebSocketVersion.*;

/**
 * Creates a new {@link WebSocketClientHandshaker} of desired protocol version.
 */
public final class WebSocketClientHandshakerFactory {

    /**
     * Private constructor so this static class cannot be instanced.
     */
    private WebSocketClientHandshakerFactory() {
    }

    /**
     * Creates a new handshaker.
     *
     * @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. Null if no sub-protocol support is required.
     * @param allowExtensions
     *            Allow extensions to be used in the reserved bits of the web socket frame
     * @param customHeaders
     *            Custom HTTP headers to send during the handshake
     */
    public static WebSocketClientHandshaker newHandshaker(
            URI webSocketURL, WebSocketVersion version, String subprotocol,
            boolean allowExtensions, HttpHeaders customHeaders) {
        return newHandshaker(webSocketURL, version, subprotocol, allowExtensions, customHeaders, 65536);
    }

    /**
     * Creates a new handshaker.
     *
     * @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. Null if no sub-protocol support is required.
     * @param allowExtensions
     *            Allow extensions to be used in the reserved bits of the web socket frame
     * @param customHeaders
     *            Custom HTTP headers to send during the handshake
     * @param maxFramePayloadLength
     *            Maximum allowable frame payload length. Setting this value to your application's
     *            requirement may reduce denial of service attacks using long data frames.
     */
    public static WebSocketClientHandshaker newHandshaker(
            URI webSocketURL, WebSocketVersion version, String subprotocol,
            boolean allowExtensions, HttpHeaders customHeaders, int maxFramePayloadLength) {
        if (version == V13) {
            return new WebSocketClientHandshaker13(
                    webSocketURL, V13, subprotocol, allowExtensions, customHeaders, maxFramePayloadLength);
        }
        if (version == V08) {
            return new WebSocketClientHandshaker08(
                    webSocketURL, V08, subprotocol, allowExtensions, customHeaders, maxFramePayloadLength);
        }
        if (version == V07) {
            return new WebSocketClientHandshaker07(
                    webSocketURL, V07, subprotocol, allowExtensions, customHeaders, maxFramePayloadLength);
        }
        if (version == V00) {
            return new WebSocketClientHandshaker00(
                    webSocketURL, V00, subprotocol, customHeaders, maxFramePayloadLength);
        }

        throw new WebSocketHandshakeException("Protocol version " + version + " not supported.");
    }
}