'iText7 : com.itextpdf.kernel.exceptions.PdfException: Invalid page structure 1

I am trying to shrink my pdf file using itext7-core:7.1.2, but getting com.itextpdf.kernel.PdfException: Invalid page structure 1.

Below code is working fine for other files, but just for one file its throwing this exception. I opened the file manually and its opening correctly.

Below is my code snippet and its throwing exception at PdfPage pdfPage = pdfDoc.getPage(p) line in below code:

public ByteBuffer multipartToFile(MultipartFile multipart, String fileName) throws Exception {
    ByteBuffer byteBuffer = null;
    File originalFile = new File(System.getProperty("java.io.tmpdir") + "/" +"original_" +fileName);
    multipart.transferTo(originalFile);
    originalFile.deleteOnExit();

try(InputStream is = new FileInputStream(originalFile)){
    //Shrink original file and make a pdf out of it
    File shrunkFile = new File(System.getProperty("java.io.tmpdir") + "/" +fileName);
    byteBuffer = shrinkOriginalFilByRequiredRatio(originalFile, shrunkFile, is, byteBuffer);
    //File Cleanup
    if(shrunkFile.exists())
        Files.delete(shrunkFile);

}
//File Cleanup
if(originalFile.exists())
    Files.delete(originalFile);

return byteBuffer;

}

protected ByteBuffer shrinkOriginalFilByRequiredRatio(File originalFile, File shrunkFile, InputStream is, ByteBuffer byteBuffer) throws Exception {
    LOGGER.info("started to Shrink originalFile={}", originalFile);
    try (PdfWriter pdrWriter = new PdfWriter(shrunkFile.getAbsoluteFile())){
        PdfDocument pdfDoc = new PdfDocument(new PdfReader(is), pdrWriter);
        float percentage = 0.9f;
        for (int p = 1; p <= pdfDoc.getNumberOfPages(); p++) {
            PdfPage pdfPage = pdfDoc.getPage(p);
            Rectangle pageSize = pdfPage.getPageSize();
        float offsetX = (pageSize.getWidth() * (1 - percentage)) / 2;
        float offsetY = (pageSize.getHeight() * (1 - percentage)) / 2;

        new PdfCanvas(pdfPage.newContentStreamBefore(), pdfPage.getResources(), pdfDoc)
                .writeLiteral(String.format(Locale.ENGLISH, "\nq %s 0 0 %s %s %s cm\nq\n",
                        percentage, percentage, offsetX, offsetY));

        new PdfCanvas(pdfPage.newContentStreamAfter(), pdfPage.getResources(), pdfDoc)
                .writeLiteral("\nQ\nQ\n");
    }
    pdfDoc.close();

    try (InputStream isShrunk = new FileInputStream(shrunkFile)){
        byte[] byteArray = ByteStreams.toByteArray(isShrunk);
        byteBuffer = ByteBuffer.wrap(byteArray);
    }

} catch (Exception e) {
    LOGGER.error("Exception : file Shrink exception {}", ExceptionUtils.getStackTrace(e));
    throw e;
}
return byteBuffer;

}

And the output exception is:

com.itextpdf.kernel.exceptions.PdfException: Invalid page structure 1.
    at com.itextpdf.kernel.pdf.PdfPagesTree.loadPage(PdfPagesTree.java:386)
    at com.itextpdf.kernel.pdf.PdfPagesTree.loadPage(PdfPagesTree.java:343)
    at com.itextpdf.kernel.pdf.PdfPagesTree.getPage(PdfPagesTree.java:120)
    at com.itextpdf.kernel.pdf.PdfDocument.getPage(PdfDocument.java:416)
javaitextpdf-generationitext7


Solution 1:[1]

The issue was with the file, I recreated the pdf and the upload was successful.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Amrit raj singh

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