DGNum/Stirling-PDF
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security (#85)

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Anthony Stirling 2023-04-03 23:16:11 +01:00 committed by GitHub
parent d4459eb6d6
commit f9fe303671
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3 changed files with 28 additions and 17 deletions
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2
build.gradle
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@ -21,7 +21,7 @@ dependencies {
// https://mvnrepository.com/artifact/org.apache.pdfbox/jbig2-imageio
implementation group: 'org.apache.pdfbox', name: 'jbig2-imageio', version: '3.0.4'
implementation 'commons-io:commons-io:2.11.0'
//general PDF
implementation 'org.apache.pdfbox:pdfbox:2.0.27'

16
src/main/java/stirling/software/SPDF/controller/OCRController.java
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@ -6,6 +6,7 @@ import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
@ -29,6 +30,7 @@ import org.springframework.web.servlet.ModelAndView;
import stirling.software.SPDF.utils.ProcessExecutor;
//import com.spire.pdf.*;
import java.util.concurrent.Semaphore;
import java.util.regex.Pattern;
@Controller
public class OCRController {
@ -41,8 +43,6 @@ public class OCRController {
modelAndView.addObject("currentPage", "ocr-pdf");
return modelAndView;
}
private final Semaphore semaphore = new Semaphore(2);
@PostMapping("/ocr-pdf")
public ResponseEntity<byte[]> processPdfWithOCR(@RequestParam("fileInput") MultipartFile inputFile,
@ -59,9 +59,19 @@ public class OCRController {
throw new IOException("Please select at least one language.");
}
// Validate and sanitize selected languages using regex
String languagePattern = "^[a-zA-Z]{3}$"; // Regex pattern for three-letter language codes
selectedLanguages = selectedLanguages.stream()
.filter(lang -> Pattern.matches(languagePattern, lang))
.collect(Collectors.toList());
if (selectedLanguages.isEmpty()) {
throw new IOException("None of the selected languages are valid.");
}
// Save the uploaded file to a temporary location
Path tempInputFile = Files.createTempFile("input_", ".pdf");
inputFile.transferTo(tempInputFile.toFile());
Files.copy(inputFile.getInputStream(), tempInputFile, StandardCopyOption.REPLACE_EXISTING);
// Prepare the output file path
Path tempOutputFile = Files.createTempFile("output_", ".pdf");

27
src/main/java/stirling/software/SPDF/controller/converters/ConvertOfficeController.java
View file

@ -1,6 +1,7 @@
package stirling.software.SPDF.controller.converters;
import java.io.IOException;
import java.nio.file.StandardCopyOption;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
@ -14,7 +15,7 @@ import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.apache.commons.io.FilenameUtils;
import stirling.software.SPDF.utils.PdfUtils;
import stirling.software.SPDF.utils.ProcessExecutor;
@Controller
@ -39,14 +40,20 @@ public class ConvertOfficeController {
public byte[] convertToPdf(MultipartFile inputFile) throws IOException, InterruptedException {
// Check for valid file extension
String originalFilename = inputFile.getOriginalFilename();
if (originalFilename == null || !isValidFileExtension(FilenameUtils.getExtension(originalFilename))) {
throw new IllegalArgumentException("Invalid file extension");
}
// Save the uploaded file to a temporary location
Path tempInputFile = Files.createTempFile("input_", "." + getFileExtension(inputFile.getOriginalFilename()));
inputFile.transferTo(tempInputFile.toFile());
Path tempInputFile = Files.createTempFile("input_", "." + FilenameUtils.getExtension(originalFilename));
Files.copy(inputFile.getInputStream(), tempInputFile, StandardCopyOption.REPLACE_EXISTING);
// Prepare the output file path
Path tempOutputFile = Files.createTempFile("output_", ".pdf");
// Run the LibreOffice command
// Run the LibreOffice command
List<String> command = new ArrayList<>(Arrays.asList("unoconv", "-vvv",
"-f",
"pdf",
@ -64,14 +71,8 @@ public byte[] convertToPdf(MultipartFile inputFile) throws IOException, Interrup
return pdfBytes;
}
private String getFileExtension(String fileName) {
int dotIndex = fileName.lastIndexOf('.');
if (dotIndex == -1) {
return "";
}
return fileName.substring(dotIndex + 1);
private boolean isValidFileExtension(String fileExtension) {
String extensionPattern = "^(?i)[a-z0-9]{2,4}$";
return fileExtension.matches(extensionPattern);
}
}