com.intuit.karate.netty.WebSocketClientInitializer.java Source code

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Here is the source code for com.intuit.karate.netty.WebSocketClientInitializer.java

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/*
 * The MIT License
 *
 * Copyright 2018 Intuit Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.intuit.karate.netty;

import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.codec.http.DefaultHttpHeaders;
import io.netty.handler.codec.http.HttpClientCodec;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker;
import io.netty.handler.codec.http.websocketx.WebSocketClientHandshakerFactory;
import io.netty.handler.codec.http.websocketx.WebSocketVersion;
import io.netty.handler.codec.http.websocketx.extensions.compression.WebSocketClientCompressionHandler;
import io.netty.handler.ssl.SslContextBuilder;
import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
import java.net.URI;
import java.util.Map;
import javax.net.ssl.SSLException;

/**
 *
 * @author pthomas3
 */

public class WebSocketClientInitializer extends ChannelInitializer<SocketChannel> {

    private final URI uri;
    private final int port;
    private final SslContext sslContext;
    private final WebSocketClientHandler handler;

    public WebSocketClientInitializer(WebSocketOptions options, WebSocketListener listener) {
        this.uri = options.getUri();
        this.port = options.getPort();
        if (options.isSsl()) {
            try {
                sslContext = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE)
                        .build();
            } catch (SSLException e) {
                throw new RuntimeException(e);
            }
        } else {
            sslContext = null;
        }
        HttpHeaders nettyHeaders = new DefaultHttpHeaders();
        Map<String, Object> headers = options.getHeaders();
        if (headers != null) {
            headers.forEach((k, v) -> nettyHeaders.add(k, v));
        }
        WebSocketClientHandshaker handShaker = WebSocketClientHandshakerFactory.newHandshaker(uri,
                WebSocketVersion.V13, options.getSubProtocol(), true, nettyHeaders, options.getMaxPayloadSize());
        handler = new WebSocketClientHandler(handShaker, listener);
    }

    @Override
    protected void initChannel(SocketChannel ch) throws Exception {
        ChannelPipeline p = ch.pipeline();
        if (sslContext != null) {
            p.addLast(sslContext.newHandler(ch.alloc(), uri.getHost(), port));
        }
        p.addLast(new HttpClientCodec());
        p.addLast(new HttpObjectAggregator(8192));
        p.addLast(WebSocketClientCompressionHandler.INSTANCE);
        p.addLast(handler);
    }

    public WebSocketClientHandler getHandler() {
        return handler;
    }

}