com.lufs.preresearch.nettyrouter.playground.HttpHelloWorldServerHandler.java Source code

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Here is the source code for com.lufs.preresearch.nettyrouter.playground.HttpHelloWorldServerHandler.java

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/*
 * Copyright 2013 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 com.lufs.preresearch.nettyrouter.playground;

import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.*;
import io.netty.handler.codec.http.router.Router;

import java.lang.invoke.MethodHandle;

public class HttpHelloWorldServerHandler extends SimpleChannelInboundHandler<FullHttpRequest> {
    private Router<MethodHandle> router;

    public HttpHelloWorldServerHandler(Router<MethodHandle> router) {
        this.router = router;
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest msg) throws Exception {
        msg.retain();
        String uri = msg.uri();
        HttpMethod method = msg.method();
        try {
            router.route(method, uri).target().invokeExact(ctx, msg);
        } catch (Throwable throwable) {
            throwable.printStackTrace();
            sendError(ctx, HttpResponseStatus.INTERNAL_SERVER_ERROR);
        }

    }

    private void sendError(ChannelHandlerContext ctx, HttpResponseStatus httpResponseStatus) {
        FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, httpResponseStatus);
        ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);
    }
}