org.apache.tika.server.MetadataResource.java Source code

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Here is the source code for org.apache.tika.server.MetadataResource.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.apache.tika.server;

import au.com.bytecode.opencsv.CSVWriter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.AutoDetectParser;
import org.xml.sax.helpers.DefaultHandler;

import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.StreamingOutput;
import javax.ws.rs.core.UriInfo;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.Arrays;

@Path("/meta{id:(/.*)?}")
public class MetadataResource {
    private static final Log logger = LogFactory.getLog(MetadataResource.class);

    @PUT
    @Produces("text/csv")
    public StreamingOutput getMetadata(InputStream is, @Context HttpHeaders httpHeaders, @Context UriInfo info)
            throws Exception {
        final Metadata metadata = new Metadata();
        AutoDetectParser parser = TikaResource.createParser();
        TikaResource.fillMetadata(parser, metadata, httpHeaders);
        TikaResource.logRequest(logger, info, metadata);

        parser.parse(is, new DefaultHandler(), metadata);

        return new StreamingOutput() {
            public void write(OutputStream outputStream) throws IOException, WebApplicationException {
                CSVWriter writer = new CSVWriter(new OutputStreamWriter(outputStream));
                for (String name : metadata.names()) {
                    String[] values = metadata.getValues(name);
                    ArrayList<String> list = new ArrayList<String>(values.length + 1);
                    list.add(name);
                    list.addAll(Arrays.asList(values));
                    writer.writeNext(list.toArray(values));
                }
                writer.close();
            }
        };
    }
}