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DiscoveryService.java
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DiscoveryService.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.server.rest.discovery;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Optional;
import javax.ws.rs.GET;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import org.neo4j.helpers.AdvertisedSocketAddress;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.server.configuration.ServerSettings;
import org.neo4j.server.rest.repr.DiscoveryRepresentation;
import org.neo4j.server.rest.repr.OutputFormat;
import static org.neo4j.graphdb.factory.GraphDatabaseSettings.boltConnectors;
/**
* Used to discover the rest of the server URIs through a HTTP GET request to
* the server root (/).
*/
@Path( "/" )
public class DiscoveryService
{
private final Config config;
private final OutputFormat outputFormat;
// Your IDE might tell you to make this less visible than public. Don't. JAX-RS demands is to be public.
public DiscoveryService( @Context Config config, @Context OutputFormat outputFormat )
{
this.config = config;
this.outputFormat = outputFormat;
}
@GET
@Produces( MediaType.APPLICATION_JSON )
public Response getDiscoveryDocument( @Context UriInfo uriInfo ) throws URISyntaxException
{
String managementUri = config.get( ServerSettings.management_api_path ).getPath() + "/";
String dataUri = config.get( ServerSettings.rest_api_path ).getPath() + "/";
Optional<AdvertisedSocketAddress> boltAddress = boltConnectors( config ).stream().findFirst()
.map( boltConnector -> config.get( boltConnector.advertised_address ) );
if ( boltAddress.isPresent() )
{
AdvertisedSocketAddress advertisedSocketAddress = boltAddress.get();
if ( advertisedSocketAddress.getHostname().equals( "localhost" ) )
{
// Use the port specified in the config, but not the host
return outputFormat.ok( new DiscoveryRepresentation( managementUri, dataUri,
new AdvertisedSocketAddress( uriInfo.getBaseUri().getHost(),
advertisedSocketAddress.getPort() ) ) );
}
else
{
// Use the config verbatim since it seems sane
return outputFormat
.ok( new DiscoveryRepresentation( managementUri, dataUri, advertisedSocketAddress ) );
}
}
else
{
// There's no config, compute possible endpoint using host header and default bolt port.
return outputFormat.ok( new DiscoveryRepresentation( managementUri, dataUri,
new AdvertisedSocketAddress( uriInfo.getBaseUri().getHost(), 7687 ) ) );
}
}
@GET
@Produces( MediaType.WILDCARD )
public Response redirectToBrowser()
{
return outputFormat.seeOther( config.get( ServerSettings.browser_path ) );
}
}