Java tutorial
/* * Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. * * Licensed 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 org.wso2.carbon.transport.http.netty.sender; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelInitializer; import io.netty.channel.socket.SocketChannel; import io.netty.handler.codec.http.HttpContentCompressor; import io.netty.handler.codec.http.HttpRequestEncoder; import io.netty.handler.codec.http.HttpResponseDecoder; import io.netty.handler.logging.LogLevel; import io.netty.handler.ssl.SslHandler; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.wso2.carbon.transport.http.netty.common.Constants; import org.wso2.carbon.transport.http.netty.listener.HTTPTraceLoggingHandler; import javax.net.ssl.SSLEngine; /** * Channel Initializer for for cross domain redirect handling */ public class RedirectChannelInitializer extends ChannelInitializer<SocketChannel> { private static final Logger log = LoggerFactory.getLogger(HTTPClientInitializer.class); private SSLEngine sslEngine; //Add SSL support to channel private boolean httpTraceLogEnabled; //Will be used, if enabled, to log events private int maxRedirectCount; private boolean chunkDisabled; private ChannelHandlerContext originalChannelContext; private boolean isIdleHandlerOfTargetChannelRemoved; public RedirectChannelInitializer(SSLEngine sslEngine, boolean httpTraceLogEnabled, int maxRedirectCount, boolean chunkDisabled, ChannelHandlerContext originalChannelContext, boolean isIdleHandlerOfTargetChannelRemoved) { this.sslEngine = sslEngine; this.httpTraceLogEnabled = httpTraceLogEnabled; this.maxRedirectCount = maxRedirectCount; this.chunkDisabled = chunkDisabled; this.originalChannelContext = originalChannelContext; this.isIdleHandlerOfTargetChannelRemoved = isIdleHandlerOfTargetChannelRemoved; } @Override protected void initChannel(SocketChannel ch) throws Exception { // Add the generic handlers to the pipeline // e.g. SSL handler if (sslEngine != null) { if (log.isDebugEnabled()) { log.debug("adding ssl handler"); } ch.pipeline().addLast("ssl", new SslHandler(this.sslEngine)); } ch.pipeline().addLast("compressor", new HttpContentCompressor()); ch.pipeline().addLast("decoder", new HttpResponseDecoder()); ch.pipeline().addLast("encoder", new HttpRequestEncoder()); if (httpTraceLogEnabled) { ch.pipeline().addLast(Constants.HTTP_TRACE_LOG_HANDLER, new HTTPTraceLoggingHandler("tracelog.http.upstream", LogLevel.DEBUG)); } RedirectHandler redirectHandler = new RedirectHandler(sslEngine, httpTraceLogEnabled, maxRedirectCount, chunkDisabled, originalChannelContext, isIdleHandlerOfTargetChannelRemoved); ch.pipeline().addLast(Constants.REDIRECT_HANDLER, redirectHandler); } }