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auto split cleanup

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This commit is contained in:
Anthony Stirling 2023-07-25 23:36:19 +01:00
parent 29dab5e47d
commit 8260eced2d
2 changed files with 20 additions and 12 deletions
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28
src/main/java/stirling/software/SPDF/controller/api/other/AutoSplitPdfController.java
View File

@ -41,20 +41,22 @@ public class AutoSplitPdfController {
@PostMapping(value = "/auto-split-pdf", consumes = "multipart/form-data")
@Operation(summary = "Auto split PDF pages into separate documents", description = "This endpoint accepts a PDF file, scans each page for a specific QR code, and splits the document at the QR code boundaries. The output is a zip file containing each separate PDF document. Input:PDF Output:ZIP Type:SISO")
public ResponseEntity<byte[]> autoSplitPdf(
@RequestParam("fileInput") @Parameter(description = "The input PDF file which needs to be split into separate documents based on QR code boundaries.", required = true) MultipartFile file)
@RequestParam("fileInput") @Parameter(description = "The input PDF file which needs to be split into separate documents based on QR code boundaries.", required = true) MultipartFile file,
@RequestParam(value ="duplexMode",defaultValue = "false") @Parameter(description = "Flag indicating if the duplex mode is active, where the page after the divider also gets removed.", required = false) boolean duplexMode)
throws IOException {
InputStream inputStream = file.getInputStream();
PDDocument document = PDDocument.load(inputStream);
PDFRenderer pdfRenderer = new PDFRenderer(document);
List<PDDocument> splitDocuments = new ArrayList<>();
List<ByteArrayOutputStream> splitDocumentsBoas = new ArrayList<>(); // create this list to store ByteArrayOutputStreams for zipping
List<ByteArrayOutputStream> splitDocumentsBoas = new ArrayList<>();
for (int page = 0; page < document.getNumberOfPages(); ++page) {
BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 150);
String result = decodeQRCode(bim);
if(QR_CONTENT.equals(result) && page != 0) {
if (QR_CONTENT.equals(result) && page != 0) {
splitDocuments.add(new PDDocument());
}
@ -65,9 +67,16 @@ public class AutoSplitPdfController {
firstDocument.addPage(document.getPage(page));
splitDocuments.add(firstDocument);
}
// If duplexMode is true and current page is a divider, then skip next page
if (duplexMode && QR_CONTENT.equals(result)) {
page++;
}
}
// After all pages are added to splitDocuments, convert each to ByteArrayOutputStream and add to splitDocumentsBoas
// Remove split documents that have no pages
splitDocuments.removeIf(pdDocument -> pdDocument.getNumberOfPages() == 0);
for (PDDocument splitDocument : splitDocuments) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
splitDocument.save(baos);
@ -77,18 +86,16 @@ public class AutoSplitPdfController {
document.close();
// After this line, you can find your zip logic integrated
Path zipFile = Files.createTempFile("split_documents", ".zip");
String filename = file.getOriginalFilename().replaceFirst("[.][^.]+$", "");
byte[] data;
try (ZipOutputStream zipOut = new ZipOutputStream(Files.newOutputStream(zipFile))) {
// loop through the split documents and write them to the zip file
for (int i = 0; i < splitDocumentsBoas.size(); i++) {
String fileName = filename + "_" + (i + 1) + ".pdf"; // You should replace "originalFileName" with the real file name
String fileName = filename + "_" + (i + 1) + ".pdf";
ByteArrayOutputStream baos = splitDocumentsBoas.get(i);
byte[] pdf = baos.toByteArray();
// Add PDF file to the zip
ZipEntry pdfEntry = new ZipEntry(fileName);
zipOut.putNextEntry(pdfEntry);
zipOut.write(pdf);
@ -101,9 +108,6 @@ public class AutoSplitPdfController {
Files.delete(zipFile);
}
// return the Resource in the response
return WebResponseUtils.bytesToWebResponse(data, filename + ".zip", MediaType.APPLICATION_OCTET_STREAM);
}

4
src/main/resources/templates/auto-split-pdf.html
View File

@ -25,6 +25,10 @@
<form method="post" enctype="multipart/form-data">
<p th:text="#{autoSplitPDF.formPrompt}"></p>
<div th:replace="~{fragments/common :: fileSelector(name='fileInput', multiple=false)}"></div>
<div class="form-check">
<input type="checkbox" class="form-check-input" name="duplexMode" id="duplexMode">
<label class="ml-3" for="duplexMode" th:text=#{autoSplitPDF.duplexMode}></label>
</div>
<p><a th:href="@{files/Auto Splitter Divider (minimal).pdf}" download th:text="#{autoSplitPDF.dividerDownload1}"></a></p>
<p><a th:href="@{files/Auto Splitter Divider (with instructions).pdf}" download th:text="#{autoSplitPDF.dividerDownload2}"></a></p>
<button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{autoSplitPDF.submit}"></button>