Package org.elasticsearch.http.netty

Source Code of org.elasticsearch.http.netty.HttpRequestHandler

/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.http.netty;

import org.elasticsearch.http.netty.pipelining.OrderedUpstreamMessageEvent;
import org.elasticsearch.rest.support.RestUtils;
import org.jboss.netty.channel.*;
import org.jboss.netty.handler.codec.http.HttpRequest;

import java.util.regex.Pattern;


/**
*
*/
@ChannelHandler.Sharable
public class HttpRequestHandler extends SimpleChannelUpstreamHandler {

    private final NettyHttpServerTransport serverTransport;
    private final Pattern corsPattern;
    private final boolean httpPipeliningEnabled;

    public HttpRequestHandler(NettyHttpServerTransport serverTransport) {
        this.serverTransport = serverTransport;
        this.corsPattern = RestUtils.getCorsSettingRegex(serverTransport.settings());
        this.httpPipeliningEnabled = serverTransport.pipelining;
    }

    @Override
    public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
        HttpRequest request;
        OrderedUpstreamMessageEvent oue = null;
        if (this.httpPipeliningEnabled && e instanceof OrderedUpstreamMessageEvent) {
            oue = (OrderedUpstreamMessageEvent) e;
            request = (HttpRequest) oue.getMessage();
        } else {
            request = (HttpRequest) e.getMessage();
        }

        // the netty HTTP handling always copy over the buffer to its own buffer, either in NioWorker internally
        // when reading, or using a cumalation buffer
        NettyHttpRequest httpRequest = new NettyHttpRequest(request, e.getChannel());
        if (oue != null) {
            serverTransport.dispatchRequest(httpRequest, new NettyHttpChannel(serverTransport, httpRequest, corsPattern, oue));
        } else {
            serverTransport.dispatchRequest(httpRequest, new NettyHttpChannel(serverTransport, httpRequest, corsPattern));
        }
        super.messageReceived(ctx, e);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception {
        serverTransport.exceptionCaught(ctx, e);
    }
}
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