ExecutingRestRequest.java

/**
 * Copyright (c) 2002-2013 "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.rest.graphdb;

import java.io.*;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLEncoder;
import java.util.Map;
import java.util.regex.Pattern;

import javax.ws.rs.core.MediaType;

import com.sun.jersey.api.client.filter.LoggingFilter;
import org.neo4j.helpers.collection.MapUtil;
import org.neo4j.rest.graphdb.util.Config;
import org.neo4j.rest.graphdb.util.JsonHelper;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.WebResource.Builder;
import com.sun.jersey.api.client.filter.HTTPBasicAuthFilter;

import static javax.ws.rs.core.MediaType.APPLICATION_JSON_TYPE;

public class ExecutingRestRequest implements RestRequest {

    public static final MediaType STREAMING_JSON_TYPE = new MediaType(APPLICATION_JSON_TYPE.getType(),APPLICATION_JSON_TYPE.getSubtype(), MapUtil.stringMap("stream","true"));
    private final String baseUri;
    private final UserAgent userAgent = new UserAgent();
    private final Client client;

    private static final Pattern pattern = Pattern.compile("^https?://.*");

    public ExecutingRestRequest( String baseUri ) {
        this( baseUri, null, null );
    }

    public ExecutingRestRequest( String baseUri, String username, String password ) {
        this.baseUri = uriWithoutSlash( baseUri );
        client = createClient();
        addAuthFilter(username, password);

    }

    protected void addAuthFilter(String username, String password) {
        if (username == null) return;
        client.addFilter( new HTTPBasicAuthFilter( username, password ) );
    }

    protected Client createClient() {
        Client client = Client.create();
        client.setConnectTimeout(Config.getConnectTimeout());
        client.setReadTimeout(Config.getReadTimeout());
        client.setChunkedEncodingSize(8*1024);
        userAgent.install(client);
        if (Config.useLoggingFilter()) {
            client.addFilter(new LoggingFilter());
        }
        return client;
    }

    private ExecutingRestRequest( String uri, Client client ) {
        this.baseUri = uriWithoutSlash( uri );
        this.client = client;
    }

    protected String uriWithoutSlash( String uri ) {
        return  (uri.endsWith("/") ?  uri.substring(0, uri.length() - 1)  : uri);
    }

    public static String encode( Object value ) {
        if ( value == null ) return "";
        try {
            return URLEncoder.encode( value.toString(), "utf-8" ).replaceAll( "\\+", "%20" );
        } catch ( UnsupportedEncodingException e ) {
            throw new RuntimeException( e );
        }
    }


    private Builder builder( String path ) {
        WebResource resource = client.resource( uri( pathOrAbsolute( path ) ) );
        if (Config.streamingIsEnabled()) return resource.accept(STREAMING_JSON_TYPE).header("X-Stream","true");
        return resource.accept(APPLICATION_JSON_TYPE);
    }

    private String pathOrAbsolute( String path ) {
        if (pattern.matcher(path).matches()) {
            return path;
        }
        return baseUri + "/" + path;
    }

 
    @Override
    public RequestResult get( String path ) {
        return RequestResult.extractFrom(builder(path).get(ClientResponse.class));
    }

 
    @Override
    public RequestResult get( String path, Object data ) {
        Builder builder = builder(path);
        if ( data != null ) {
            builder = builder.entity( JsonHelper.createJsonFrom( data ), APPLICATION_JSON_TYPE );
        }
        return RequestResult.extractFrom(builder.get(ClientResponse.class));
    }

  
    @Override
    public RequestResult delete(String path) {
        return RequestResult.extractFrom(builder(path).delete(ClientResponse.class));
    }


    @Override
    public RequestResult post( String path, Object data ) {
        Builder builder = builder( path );
        if ( data != null ) {
            Object payload = data instanceof InputStream ? data : JsonHelper.createJsonFrom(data);
            builder = builder.entity( payload , APPLICATION_JSON_TYPE );
        }
        return RequestResult.extractFrom(builder.post(ClientResponse.class));
    }

    @Override
    public RequestResult put( String path, Object data ) {
        Builder builder = builder( path );
        if ( data != null ) {
            builder = builder.entity( JsonHelper.createJsonFrom( data ), APPLICATION_JSON_TYPE );
        }
        return RequestResult.extractFrom(builder.put(ClientResponse.class));
    }

    @Override
    public RestRequest with( String uri ) {
        return new ExecutingRestRequest(uri, client);
    }

    private URI uri( String uri ) {
        try {
            return new URI( uri );
        } catch ( URISyntaxException e ) {
            throw new RuntimeException( e );
        }
    }

 
    @Override
    public String getUri() {
        return baseUri;
    }

	@Override
	public Map<?, ?> toMap(RequestResult requestResult) {	
	   return requestResult.toMap();
	}

    public void close() {
        client.destroy();
    }
}