Java tutorial
/* * * * * Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. * * * * WSO2 Inc. 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 org.wso2.gw.emulator.http.consumer; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelInboundHandlerAdapter; import io.netty.handler.codec.http.DefaultFullHttpResponse; import io.netty.handler.codec.http.FullHttpResponse; import io.netty.handler.codec.http.HttpContent; import io.netty.handler.codec.http.HttpHeaders; import io.netty.handler.codec.http.HttpRequest; import io.netty.handler.codec.http.LastHttpContent; import org.apache.log4j.Logger; import org.wso2.gw.emulator.http.dsl.HttpConsumerContext; import static io.netty.handler.codec.http.HttpResponseStatus.CONTINUE; import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1; public class HttpResponseProcessHandler extends ChannelInboundHandlerAdapter { private static final Logger log = Logger.getLogger(HttpResponseProcessHandler.class); private HttpRequestContext httpRequestContext; private HttpRequestInformationProcessor httpRequestInformationProcessor; private HttpResponseProcessor httpResponseProcessor; private HttpConsumerContext consumerContext; public HttpResponseProcessHandler(HttpConsumerContext consumerContext) { this.consumerContext = consumerContext; } @Override public void channelActive(ChannelHandlerContext ctx) throws Exception { } @Override public void channelRead(ChannelHandlerContext ctx, Object msg) { if (msg instanceof HttpRequest) { readingDelay(consumerContext.getReadingDelay()); this.httpRequestContext = new HttpRequestContext(); this.httpRequestInformationProcessor = new HttpRequestInformationProcessor(); this.httpResponseProcessor = new HttpResponseProcessor(consumerContext); HttpRequest httpRequest = (HttpRequest) msg; if (HttpHeaders.is100ContinueExpected(httpRequest)) { send100Continue(ctx); } httpRequestInformationProcessor.process(httpRequest, httpRequestContext); } else { if (msg instanceof HttpContent) { HttpContent httpContent = (HttpContent) msg; ByteBuf content = httpContent.content(); if (content.isReadable()) { httpRequestInformationProcessor.appendDecoderResult(httpRequestContext, httpContent, content); } } if (msg instanceof LastHttpContent) { ctx.fireChannelReadComplete(); } } } @Override public void channelReadComplete(ChannelHandlerContext ctx) { if (httpResponseProcessor != null) { waitingDelay(consumerContext.getWritingDelay()); this.httpResponseProcessor.process(httpRequestContext, ctx); } ctx.flush(); } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { log.error("Exception occurred while processing the response", cause); ctx.close(); } private static void send100Continue(ChannelHandlerContext ctx) { FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, CONTINUE); ctx.write(response); } private void readingDelay(int delay) { try { if (delay > 0) { Thread.sleep(delay); } } catch (InterruptedException e) { log.error("Exception occurred while processing the reading delay", e); } } private void waitingDelay(int delay) { try { if (delay > 0) { Thread.sleep(delay); } } catch (InterruptedException e) { log.error("Exception occurred while processing the waiting delay", e); } } }