tesseract ocr

pom.xml

@@ -52,6 +52,12 @@
             <version>1.18</version>
         </dependency>
 
+        <dependency>
+            <groupId>org.apache.tika</groupId>
+            <artifactId>tika-parsers</artifactId>
+            <version>1.18</version>
+        </dependency>
+
         <!-- https://mvnrepository.com/artifact/com.github.jai-imageio/jai-imageio-jpeg2000 -->
         <dependency>
             <groupId>com.github.jai-imageio</groupId>
@@ -59,6 +65,18 @@
             <version>1.3.0</version>
         </dependency>
 
+        <dependency>
+            <groupId>com.levigo.jbig2</groupId>
+            <artifactId>levigo-jbig2-imageio</artifactId>
+            <version>2.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.github.jai-imageio</groupId>
+            <artifactId>jai-imageio-core</artifactId>
+            <version>1.4.0</version>
+        </dependency>
+        
 		<dependency>
 			<groupId>org.webjars</groupId>
 			<artifactId>bootstrap</artifactId>

src/main/java/com/manalejandro/arjion/controllers/MainController.java

@@ -8,7 +8,6 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.text.Normalizer;
-import java.util.ArrayList;
 
 import javax.servlet.http.HttpServletResponse;
 
@@ -25,12 +24,14 @@ import org.apache.tika.language.LanguageIdentifier;
 import org.apache.tika.metadata.Metadata;
 import org.apache.tika.parser.AutoDetectParser;
 import org.apache.tika.parser.ParseContext;
+import org.apache.tika.parser.Parser;
+import org.apache.tika.parser.ocr.TesseractOCRConfig;
+import org.apache.tika.parser.pdf.PDFParserConfig;
 import org.apache.tika.sax.BodyContentHandler;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.core.io.ByteArrayResource;
 import org.springframework.http.HttpHeaders;
-import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
@@ -50,6 +51,9 @@ public class MainController {
     @Value("${arjion.uploadpath}")
     private String uploadpath;
 
+    @Value("${arjion.tesseractpath}")
+    private String tesseractpath;
+
     @Autowired
     public MainController(MainService mainService) {
         this.mainService = mainService;
@@ -87,7 +91,15 @@ public class MainController {
                 Path path = Paths.get(uploadpath + filename);
                 // Instancias necesarias
                 Metadata metadata = new Metadata();
-                AutoDetectParser parser = new AutoDetectParser(tikaConfig);
+                Parser parser = new AutoDetectParser(tikaConfig);
+                PDFParserConfig pdfConfig = new PDFParserConfig();
+                TesseractOCRConfig tesseractConfig = new TesseractOCRConfig();
+                tesseractConfig.setTesseractPath(tesseractpath);
+                pdfConfig.setExtractInlineImages(true);
+                ParseContext parseContext = new ParseContext();
+                parseContext.set(TesseractOCRConfig.class, tesseractConfig);
+                parseContext.set(PDFParserConfig.class, pdfConfig);
+                parseContext.set(Parser.class, parser);
                 // Usa -1 para no tener límite de 100000 chars
                 ContentHandler handler = new BodyContentHandler(-1);
                 // Castea los bytes al Stream de Tika
@@ -132,7 +144,6 @@ public class MainController {
         HttpHeaders responseHeaders = new HttpHeaders();
         responseHeaders.add("Content-Disposition", "attachment; filename=" + URLEncoder.encode(filename, "UTF-8"));
         responseHeaders.add("Content-Type", type);
-        return ResponseEntity.ok().contentLength(file.length()).headers(responseHeaders)
+        return ResponseEntity.ok().contentLength(file.length()).headers(responseHeaders).body(resource);
-                .contentType(MediaType.parseMediaType("application/octet-stream")).body(resource);
     }
 }

src/main/resources/application.properties

@@ -7,6 +7,7 @@ elasticsearch.nodename=arjion
 arjion.indexName=documentos
 arjion.documentType=documento
 arjion.uploadpath=/upload/
+arjion.tesseractpath=/usr/bin/tesseract
 spring.main.allow-bean-definition-overriding=true
 spring.thymeleaf.enabled=true
 spring.thymeleaf.prefix=classpath:/templates/