com.tess4j.rest.Tess4jV1.java Source code

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Here is the source code for com.tess4j.rest.Tess4jV1.java

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/**
 * Copyright @ 2013 Arun Gopalpuri
 *
 * Licensed 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 com.tess4j.rest;

import com.tess4j.rest.model.Image;
import com.tess4j.rest.model.Status;
import com.tess4j.rest.mongo.ImageRepository;
import net.sourceforge.tess4j.Tesseract;
import net.sourceforge.tess4j.TesseractException;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;

import javax.imageio.ImageIO;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

@EnableAutoConfiguration
@Configuration
@RestController
@ComponentScan("com.tess4j.*")
public class Tess4jV1 {

    private Logger LOGGER = LoggerFactory.getLogger(Tess4jV1.class);

    @Autowired
    private ImageRepository repository;

    @RequestMapping(value = "ocr/ping", method = RequestMethod.GET)
    public Status ping() throws Exception {
        return new Status("OK");
    }

    @RequestMapping(value = "ocr/v0.9/upload", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
    public Status doOcrFile(@RequestBody final Image image) throws Exception {
        File tmpFile = File.createTempFile("ocr_image", image.getExtension());
        try {
            FileUtils.writeByteArrayToFile(tmpFile, Base64.decodeBase64(image.getImage()));
            Tesseract tesseract = Tesseract.getInstance(); // JNA Interface Mapping
            String imageText = tesseract.doOCR(tmpFile);
            LOGGER.info("OCR Image Text = " + imageText);
        } catch (Exception e) {
            LOGGER.error("Exception while converting/uploading image: ", e);
            throw new TesseractException();
        } finally {
            tmpFile.delete();
        }
        return new Status("success");
    }

    @RequestMapping(value = "ocr/v1/upload", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
    public Status doOcr(@RequestBody Image image) throws Exception {
        try {
            //FileUtils.writeByteArrayToFile(tmpFile, Base64.decodeBase64(image.getImage()));
            ByteArrayInputStream bis = new ByteArrayInputStream(Base64.decodeBase64(image.getImage()));
            Tesseract tesseract = Tesseract.getInstance(); // JNA Interface Mapping
            String imageText = tesseract.doOCR(ImageIO.read(bis));
            image.setText(imageText);
            repository.save(image);
            LOGGER.debug("OCR Result = " + imageText);
        } catch (Exception e) {
            LOGGER.error("TessearctException while converting/uploading image: ", e);
            throw new TesseractException();
        }

        return new Status("success");
    }

    @RequestMapping(value = "ocr/v1/images/users/{userId}", method = RequestMethod.GET, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
    public List<Image> getUserImages(@PathVariable String userId) throws Exception {
        List<Image> userImages = new ArrayList<>();
        try {
            userImages = repository.findByUserId(userId);
        } catch (Exception e) {
            LOGGER.error("Exception occurred finding image for userId: {} ", userId, e);
            throw new Exception();
        }
        return userImages;
    }

    public static void main(String[] args) {
        SpringApplication.run(Tess4jV1.class, args);
    }
}