| /* |
| * 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.parser.captioning.tf; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URI; |
| import java.nio.charset.StandardCharsets; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.http.HttpResponse; |
| import org.apache.http.client.methods.HttpGet; |
| import org.apache.http.client.methods.HttpPost; |
| import org.apache.http.entity.ByteArrayEntity; |
| import org.apache.http.impl.client.DefaultHttpClient; |
| import org.json.simple.JSONArray; |
| import org.json.simple.JSONObject; |
| import org.json.simple.parser.JSONParser; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.xml.sax.ContentHandler; |
| import org.xml.sax.SAXException; |
| |
| import org.apache.tika.config.Field; |
| import org.apache.tika.config.InitializableProblemHandler; |
| import org.apache.tika.config.Param; |
| import org.apache.tika.exception.TikaConfigException; |
| import org.apache.tika.exception.TikaException; |
| import org.apache.tika.metadata.Metadata; |
| import org.apache.tika.mime.MediaType; |
| import org.apache.tika.parser.ParseContext; |
| import org.apache.tika.parser.captioning.CaptionObject; |
| import org.apache.tika.parser.recognition.ObjectRecogniser; |
| |
| /** |
| * Tensorflow image captioner. |
| * This implementation uses Tensorflow via REST API. |
| * <p> |
| * NOTE : https://wiki.apache.org/tika/ImageCaption |
| * |
| * @since Apache Tika 1.17 |
| */ |
| public class TensorflowRESTCaptioner implements ObjectRecogniser { |
| private static final Logger LOG = LoggerFactory.getLogger(TensorflowRESTCaptioner.class); |
| |
| private static final Set<MediaType> SUPPORTED_MIMES = Collections.unmodifiableSet(new HashSet<>( |
| Arrays.asList(new MediaType[]{MediaType.image("jpeg"), MediaType.image("png"), |
| MediaType.image("gif")}))); |
| |
| private static final String LABEL_LANG = "eng"; |
| |
| @Field |
| private URI apiBaseUri = URI.create("http://localhost:8764/inception/v3"); |
| |
| @Field |
| private int captions = 5; |
| |
| @Field |
| private int maxCaptionLength = 15; |
| |
| private URI apiUri; |
| |
| private URI healthUri; |
| |
| private boolean available; |
| |
| protected URI getApiUri(Metadata metadata) { |
| return apiUri; |
| } |
| |
| @Override |
| public Set<MediaType> getSupportedMimes() { |
| return SUPPORTED_MIMES; |
| } |
| |
| @Override |
| public boolean isAvailable() { |
| return available; |
| } |
| |
| @Override |
| public void initialize(Map<String, Param> params) throws TikaConfigException { |
| try { |
| healthUri = URI.create(apiBaseUri + "/ping"); |
| apiUri = URI.create(apiBaseUri + String.format(Locale.getDefault(), |
| "/caption/image?beam_size=%1$d&max_caption_length=%2$d", captions, |
| maxCaptionLength)); |
| |
| DefaultHttpClient client = new DefaultHttpClient(); |
| HttpResponse response = client.execute(new HttpGet(healthUri)); |
| available = response.getStatusLine().getStatusCode() == 200; |
| |
| LOG.info("Available = {}, API Status = {}", available, response.getStatusLine()); |
| LOG.info("Captions = {}, MaxCaptionLength = {}", captions, maxCaptionLength); |
| } catch (Exception e) { |
| available = false; |
| throw new TikaConfigException(e.getMessage(), e); |
| } |
| } |
| |
| @Override |
| public void checkInitialization(InitializableProblemHandler handler) |
| throws TikaConfigException { |
| //TODO -- what do we want to check? |
| } |
| |
| @Override |
| public List<CaptionObject> recognise(InputStream stream, ContentHandler handler, |
| Metadata metadata, ParseContext context) |
| throws IOException, SAXException, TikaException { |
| List<CaptionObject> capObjs = new ArrayList<>(); |
| try { |
| DefaultHttpClient client = new DefaultHttpClient(); |
| |
| HttpPost request = new HttpPost(getApiUri(metadata)); |
| |
| try (ByteArrayOutputStream byteStream = new ByteArrayOutputStream()) { |
| //TODO: convert this to stream, this might cause OOM issue |
| // InputStreamEntity is not working |
| // request.setEntity(new InputStreamEntity(stream, -1)); |
| IOUtils.copy(stream, byteStream); |
| request.setEntity(new ByteArrayEntity(byteStream.toByteArray())); |
| } |
| |
| HttpResponse response = client.execute(request); |
| try (InputStream reply = response.getEntity().getContent()) { |
| String replyMessage = IOUtils.toString(reply, StandardCharsets.UTF_8); |
| if (response.getStatusLine().getStatusCode() == 200) { |
| JSONObject jReply = (JSONObject) new JSONParser().parse(replyMessage); |
| JSONArray jCaptions = (JSONArray) jReply.get("captions"); |
| for (Object caption : jCaptions) { |
| JSONObject jCaption = (JSONObject) caption; |
| String sentence = (String) jCaption.get("sentence"); |
| Double confidence = (Double) jCaption.get("confidence"); |
| capObjs.add(new CaptionObject(sentence, LABEL_LANG, confidence)); |
| } |
| } else { |
| LOG.warn("Status = {}", response.getStatusLine()); |
| LOG.warn("Response = {}", replyMessage); |
| } |
| } |
| } catch (Exception e) { |
| LOG.warn(e.getMessage(), e); |
| } |
| return capObjs; |
| } |
| } |