com.cats.version.httpserver.msg.IMsgHandler.java Source code

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Here is the source code for com.cats.version.httpserver.msg.IMsgHandler.java

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/*
 * Copyright 2015 lixiaobo
 *
 * VersionUpgrade 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.cats.version.httpserver.msg;

import static io.netty.handler.codec.http.HttpHeaderNames.CONTENT_TYPE;
import static io.netty.handler.codec.http.HttpResponseStatus.OK;
import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.util.CharsetUtil;

/**
 * @author xblia2 Jun 10, 2015
 */
public abstract class IMsgHandler {
    public abstract boolean handleMessage(String strReq, ChannelHandlerContext ctx);

    public abstract int getType();

    public void sendMessageToClient(String strRsp, ChannelHandlerContext ctx) {
        if (null == strRsp) {
            return;
        }
        FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, OK);
        response.headers().set(CONTENT_TYPE, "text/html; charset=UTF-8");

        ByteBuf buffer = Unpooled.copiedBuffer(strRsp, CharsetUtil.UTF_8);
        response.content().writeBytes(buffer);
        buffer.release();

        // Close the connection as soon as the error message is sent.
        ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);
    }
}