Java tutorial
/* * Copyright 2014 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 http2.bench.netty; import io.netty.buffer.ByteBuf; import io.netty.buffer.ByteBufUtil; import io.netty.channel.ChannelFutureListener; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.SimpleChannelInboundHandler; import io.netty.handler.codec.http.DefaultFullHttpResponse; import io.netty.handler.codec.http.FullHttpRequest; import io.netty.handler.codec.http.FullHttpResponse; import io.netty.handler.codec.http.HttpHeaderValues; import io.netty.handler.codec.http.HttpUtil; import java.util.concurrent.TimeUnit; import static io.netty.handler.codec.http.HttpHeaderNames.CONNECTION; import static io.netty.handler.codec.http.HttpHeaderNames.CONTENT_LENGTH; import static io.netty.handler.codec.http.HttpHeaderNames.CONTENT_TYPE; import static io.netty.handler.codec.http.HttpResponseStatus.CONTINUE; import static io.netty.handler.codec.http.HttpResponseStatus.OK; import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1; import static io.netty.util.internal.ObjectUtil.checkNotNull; /** * HTTP handler that responds with a "Hello World" */ public class HelloWorldHttp1Handler extends SimpleChannelInboundHandler<FullHttpRequest> { private final String establishApproach; public HelloWorldHttp1Handler(String establishApproach) { this.establishApproach = checkNotNull(establishApproach, "establishApproach"); } @Override public void channelRead0(ChannelHandlerContext ctx, FullHttpRequest req) throws Exception { if (HttpUtil.is100ContinueExpected(req)) { ctx.write(new DefaultFullHttpResponse(HTTP_1_1, CONTINUE)); } ctx.executor().schedule(() -> { boolean keepAlive = HttpUtil.isKeepAlive(req); FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, OK, HelloWorldHttp2Handler.RESPONSE_BYTES.duplicate()); response.headers().set(CONTENT_TYPE, "text/plain; charset=UTF-8"); response.headers().setInt(CONTENT_LENGTH, response.content().readableBytes()); if (!keepAlive) { ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE); } else { response.headers().set(CONNECTION, HttpHeaderValues.KEEP_ALIVE); ctx.writeAndFlush(response); } }, 20, TimeUnit.MILLISECONDS); } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { cause.printStackTrace(); ctx.close(); } }