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new workaround for remove digital signature

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This commit is contained in:
Ludy87
2024-06-01 21:30:05 +02:00
parent 01a3fa8cfe
commit 5799e61385
34 changed files with 137 additions and 9 deletions
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52
src/main/java/stirling/software/SPDF/controller/api/converters/ConvertPDFToPDFA.java
View File

@@ -1,10 +1,22 @@
package stirling.software.SPDF.controller.api.converters;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import org.apache.pdfbox.Loader;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentCatalog;
import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;
import org.apache.pdfbox.pdmodel.interactive.form.PDField;
import org.apache.pdfbox.pdmodel.interactive.form.PDSignatureField;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
@@ -26,6 +38,8 @@ import stirling.software.SPDF.utils.WebResponseUtils;
@Tag(name = "Convert", description = "Convert APIs")
public class ConvertPDFToPDFA {
private static final Logger logger = LoggerFactory.getLogger(ConvertPDFToPDFA.class);
@PostMapping(consumes = "multipart/form-data", value = "/pdf/pdfa")
@Operation(
summary = "Convert a PDF to a PDF/A",
@@ -36,9 +50,39 @@ public class ConvertPDFToPDFA {
MultipartFile inputFile = request.getFileInput();
String outputFormat = request.getOutputFormat();
// Save the uploaded file to a temporary location
// Convert MultipartFile to byte[]
byte[] pdfBytes = inputFile.getBytes();
// Load the PDF document
PDDocument document = Loader.loadPDF(pdfBytes);
// Get the document catalog
PDDocumentCatalog catalog = document.getDocumentCatalog();
// Get the AcroForm
PDAcroForm acroForm = catalog.getAcroForm();
if (acroForm != null) {
// Remove signature fields safely
List<PDField> fieldsToRemove =
acroForm.getFields().stream()
.filter(field -> field instanceof PDSignatureField)
.collect(Collectors.toList());
if (!fieldsToRemove.isEmpty()) {
acroForm.flatten(fieldsToRemove, false);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
document.save(baos);
pdfBytes = baos.toByteArray();
}
}
document.close();
// Save the uploaded (and possibly modified) file to a temporary location
Path tempInputFile = Files.createTempFile("input_", ".pdf");
inputFile.transferTo(tempInputFile.toFile());
try (OutputStream outputStream = new FileOutputStream(tempInputFile.toFile())) {
outputStream.write(pdfBytes);
}
// Prepare the output file path
Path tempOutputFile = Files.createTempFile("output_", ".pdf");
@@ -58,7 +102,7 @@ public class ConvertPDFToPDFA {
.runCommandWithOutputHandling(command);
// Read the optimized PDF file
byte[] pdfBytes = Files.readAllBytes(tempOutputFile);
byte[] optimizedPdfBytes = Files.readAllBytes(tempOutputFile);
// Clean up the temporary files
Files.deleteIfExists(tempInputFile);
@@ -69,6 +113,6 @@ public class ConvertPDFToPDFA {
Filenames.toSimpleFileName(inputFile.getOriginalFilename())
.replaceFirst("[.][^.]+$", "")
+ "_PDFA.pdf";
return WebResponseUtils.bytesToWebResponse(pdfBytes, outputFilename);
return WebResponseUtils.bytesToWebResponse(optimizedPdfBytes, outputFilename);
}
}

14
src/main/java/stirling/software/SPDF/controller/api/security/RemoveCertSignController.java
View File

@@ -1,11 +1,14 @@
package stirling.software.SPDF.controller.api.security;
import java.io.ByteArrayOutputStream;
import java.util.List;
import java.util.stream.Collectors;
import org.apache.pdfbox.Loader;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentCatalog;
import org.apache.pdfbox.pdmodel.interactive.form.PDAcroForm;
import org.apache.pdfbox.pdmodel.interactive.form.PDField;
import org.apache.pdfbox.pdmodel.interactive.form.PDSignatureField;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@@ -54,8 +57,15 @@ public class RemoveCertSignController {
// Get the AcroForm
PDAcroForm acroForm = catalog.getAcroForm();
if (acroForm != null) {
// Remove signature fields
acroForm.getFields().removeIf(field -> field instanceof PDSignatureField);
// Remove signature fields safely
List<PDField> fieldsToRemove =
acroForm.getFields().stream()
.filter(field -> field instanceof PDSignatureField)
.collect(Collectors.toList());
if (!fieldsToRemove.isEmpty()) {
acroForm.flatten(fieldsToRemove, false);
}
}
// Save the modified document to the ByteArrayOutputStream