com.tc.websocket.server.handler.RedirectionHandler.java Source code

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Here is the source code for com.tc.websocket.server.handler.RedirectionHandler.java

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/*
 * Copyright 2016 Tek Counsel LLC
 *
 * Both 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.tc.websocket.server.handler;

import static io.netty.handler.codec.http.HttpResponseStatus.FOUND;
import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;

import com.tc.utils.StringCache;
import com.tc.websocket.Config;
import com.tc.websocket.IConfig;

import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
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.HttpHeaderNames;
import io.netty.handler.codec.http.HttpHeaders;

// TODO: Auto-generated Javadoc
/**
 * The Class RedirectionHandler.
 */
@ChannelHandler.Sharable
public class RedirectionHandler extends SimpleChannelInboundHandler<FullHttpRequest> {

    /* (non-Javadoc)
     * @see io.netty.channel.SimpleChannelInboundHandler#channelRead0(io.netty.channel.ChannelHandlerContext, java.lang.Object)
     */
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest req) throws Exception {
        FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, FOUND);

        HttpHeaders headers = req.headers();

        IConfig cfg = Config.getInstance();

        StringBuilder sb = new StringBuilder();

        if (cfg.isEncrypted()) {
            sb.append(StringCache.HTTPS);
        } else {
            sb.append(StringCache.HTTP);
        }

        //finish up the url.
        sb.append(headers.get(HttpHeaderNames.HOST)).append(StringCache.COLON).append(cfg.getPort())
                .append(req.uri());

        //apply the redirect url
        response.headers().set(HttpHeaderNames.LOCATION, sb.toString());

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

}