package stirling.software.SPDF.utils; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.StandardCopyOption; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; import org.apache.commons.io.FileUtils; import org.apache.commons.io.IOUtils; import org.springframework.http.HttpStatus; import org.springframework.http.MediaType; import org.springframework.http.ResponseEntity; import org.springframework.web.multipart.MultipartFile; public class PDFToFile { public ResponseEntity processPdfToOfficeFormat(MultipartFile inputFile, String outputFormat, String libreOfficeFilter) throws IOException, InterruptedException { if (!"application/pdf".equals(inputFile.getContentType())) { return new ResponseEntity<>(HttpStatus.BAD_REQUEST); } // Get the original PDF file name without the extension String originalPdfFileName = inputFile.getOriginalFilename(); String pdfBaseName = originalPdfFileName.substring(0, originalPdfFileName.lastIndexOf('.')); // Validate output format List allowedFormats = Arrays.asList("doc", "docx", "odt", "ppt", "pptx", "odp", "rtf", "html", "xml", "txt:Text"); if (!allowedFormats.contains(outputFormat)) { return new ResponseEntity<>(HttpStatus.BAD_REQUEST); } Path tempInputFile = null; Path tempOutputDir = null; byte[] fileBytes; String fileName = "temp.file"; try { // Save the uploaded file to a temporary location tempInputFile = Files.createTempFile("input_", ".pdf"); Files.copy(inputFile.getInputStream(), tempInputFile, StandardCopyOption.REPLACE_EXISTING); // Prepare the output directory tempOutputDir = Files.createTempDirectory("output_"); // Run the LibreOffice command List command = new ArrayList<>( Arrays.asList("soffice", "--infilter=" + libreOfficeFilter, "--convert-to", outputFormat, "--outdir", tempOutputDir.toString(), tempInputFile.toString())); int returnCode = ProcessExecutor.getInstance(ProcessExecutor.Processes.LIBRE_OFFICE).runCommandWithOutputHandling(command); // Get output files List outputFiles = Arrays.asList(tempOutputDir.toFile().listFiles()); if (outputFiles.size() == 1) { // Return single output file File outputFile = outputFiles.get(0); if (outputFormat.equals("txt:Text")) { outputFormat = "txt"; } fileName = pdfBaseName + "." + outputFormat; fileBytes = FileUtils.readFileToByteArray(outputFile); } else { // Return output files in a ZIP archive fileName = pdfBaseName + "To" + outputFormat + ".zip"; ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); ZipOutputStream zipOutputStream = new ZipOutputStream(byteArrayOutputStream); for (File outputFile : outputFiles) { ZipEntry entry = new ZipEntry(outputFile.getName()); zipOutputStream.putNextEntry(entry); FileInputStream fis = new FileInputStream(outputFile); IOUtils.copy(fis, zipOutputStream); fis.close(); zipOutputStream.closeEntry(); } zipOutputStream.close(); fileBytes = byteArrayOutputStream.toByteArray(); } } finally { // Clean up the temporary files if (tempInputFile != null) Files.delete(tempInputFile); if (tempOutputDir != null) FileUtils.deleteDirectory(tempOutputDir.toFile()); } return PdfUtils.bytesToWebResponse(fileBytes, fileName, MediaType.APPLICATION_OCTET_STREAM); } }