How to fix an error during generating PDF: PdfBoxTextRenderer.getWidth(PdfBoxTextRenderer.java:300)

Question

I use openhtmltopdf library to convert my html templates to PDF:

    try (OutputStream os = new FileOutputStream(filePath);
            PDDocument doc = new PDDocument()) {
        for (String html : htmlPagesWithValues) {
            PdfRendererBuilder builder = new PdfRendererBuilder();
            builder.defaultTextDirection(BaseRendererBuilder.TextDirection.LTR);
            builder.useDefaultPageSize(210, 297, BaseRendererBuilder.PageSizeUnits.MM);
            builder.useProtocolsStreamImplementation(new InternalFSStreamFactory(), "localProtocol");
            builder.withHtmlContent(html, "");
            builder.useSVGDrawer(new BatikSVGDrawer());
            builder.usePDDocument(doc);
            PdfBoxRenderer renderer = builder.buildPdfRenderer();
            renderer.createPDFWithoutClosing();
        }
        doc.save(os);
    } catch (Exception ex) {
        log.debug("Stacktrace: ", ex);
    }

During generating PDF file I am getting the following stacktrace:

java.lang.NullPointerException: null at com.openhtmltopdf.pdfboxout.PdfBoxTextRenderer.getWidth(PdfBoxTextRenderer.java:300) at com.openhtmltopdf.layout.Breaker.doBreakText(Breaker.java:147) at com.openhtmltopdf.layout.Breaker.doBreakText(Breaker.java:115) at com.openhtmltopdf.layout.Breaker.breakText(Breaker.java:109) at com.openhtmltopdf.layout.InlineBoxing.layoutText(InlineBoxing.java:959)

...

score 0 · Accepted Answer · answered Mar 22 '19 at 18:05

0

I found the issue. I use images on PDF file that hosted on our server. The Openpdftohtml library tried to access the images by the our public URL but this URL was not available. After adding access PDF is successfully created. I've also opened the issue on Github: https://github.com/danfickle/openhtmltopdf/issues/267

answered Mar 22 '19 at 18:05

Taras Melnyk

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It seems your issue was closed because you didn't provide a test case. Even though the library could probably benefit from a better exception message. – Sebastiaan van den Broek Mar 22 '19 at 18:09
I've fully described the problem and answered on my own question after the reason was found. – Taras Melnyk Mar 22 '19 at 18:22
The problem is that line 300 in that class could only throw a NPE when a variable 'font' is null, so it's obviously not a good exception message if it was caused by some file not being accessible. – Sebastiaan van den Broek Mar 22 '19 at 18:23
Yes, I agree with you. It was taken some time before I found where was issue. – Taras Melnyk Mar 22 '19 at 18:25

How to fix an error during generating PDF: PdfBoxTextRenderer.getWidth(PdfBoxTextRenderer.java:300)

1 Answers1