com.lowagie.text.ExceptionConverter: Index 4100 out of bounds for length 1068

[Aleksandar Vidaković]

Hi all,

I have recently started using Flyingsaucer with Thymeleaf.

I have troubles adding Raleway font with something like:

try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
ITextRenderer renderer = new ITextRenderer();

renderer.getFontResolver().addFont("fonts/Raleway-Regular.ttf", BaseFont.IDENTITY_H, true);

renderer.setDocumentFromString(htmlContent);
renderer.layout();
renderer.createPDF(outputStream, true);
return outputStream.toByteArray();
} catch (DocumentException e) {
throw new RuntimeException(e);
}

Locally it seems it works, but once I build docker image I get error:

com.lowagie.text.ExceptionConverter: Index 4100 out of bounds for length 1068

I figured it might be that Maven is messing around with ttf, and I tried adding:

<plugin>
<artifactId>maven-resources-plugin</artifactId>
<configuration>
<encoding>UTF-8</encoding>
<nonFilteredFileExtensions>
<nonFilteredFileExtension>ttf</nonFilteredFileExtension>
</nonFilteredFileExtensions>
</configuration>
</plugin>

but this does not help.

I am using flying-saucer-pdf:9.11.4

Does anyone have any idea what could be the cause?

Thanks,

Aleksandar

[Andrei Solntsev]

Hi Aleksandar!

At least, please show the full stack trace.

Andrei Solntsev

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[Aleksandar Vidaković]

Hi Andrei,

I would gladly, but there is not much more to it.

Method:

ublic byte[] generatePdfForReport(Long reportId)
throws IOException {
var report = reportService.getById(reportId);
ClassLoaderTemplateResolver templateResolver = new ClassLoaderTemplateResolver();
templateResolver.setSuffix(".html");
templateResolver.setTemplateMode(TemplateMode.HTML);
templateResolver.setCharacterEncoding("UTF-8");

var context = getContext(report);

String htmlContent = templateEngine.process("thyme", context);

try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
ITextRenderer renderer = new ITextRenderer();

renderer.getFontResolver().addFont("fonts/Raleway-Regular.ttf", true);
renderer.getFontResolver().addFont("fonts/Raleway-Bold.ttf", BaseFont.IDENTITY_H, true);

renderer.setDocumentFromString(htmlContent);
renderer.layout();
renderer.createPDF(outputStream, true);
return outputStream.toByteArray();
}
}

Thanks,

Aleks

[Andrei Solntsev]

Sorry Aleks, but we also can't do anything without seeing this stacktrace.

It's your web application who hides the stackrace.

You need to configure your web app to properly log the error with stacktrace.

Andrei Solntsev

To view this discussion visit https://groups.google.com/d/msgid/flying-saucer-users/5811b285-a324-4737-a7de-41a9c31e4af7n%40googlegroups.com.

[Aleksandar Vidaković]

Hi Andrei,

Is this helpful?

this is my latest version of the code which generates pdf:

@Service
@Slf4j
public class PdfRenderer {

private static final List<String> FONTS =
List.of("fonts/Raleway-Regular.ttf", "fonts/Raleway-Bold.ttf");

private final TemplateEngine templateEngine;

public PdfRenderer(TemplateEngine templateEngine) {
ClassLoaderTemplateResolver resolver = new ClassLoaderTemplateResolver();
resolver.setPrefix("templates/");
resolver.setSuffix(".html");
resolver.setTemplateMode(TemplateMode.HTML);
resolver.setCharacterEncoding("UTF-8");

templateEngine.setTemplateResolver(resolver);

this.templateEngine = templateEngine;
}

public byte[] renderPdf(String templateName, Context context) {

try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
ITextRenderer renderer = new ITextRenderer();

for (String font : FONTS) {
renderer.getFontResolver().addFont(font, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
}

renderer.setDocumentFromString(templateEngine.process(templateName, context));
renderer.layout();
renderer.createPDF(outputStream);
return outputStream.toByteArray();
} catch (Exception e) {
e.printStackTrace();
throw new PdfGenerationException("Error generating PDF", e);
}
}
}

[Aleksandar Vidaković]

I am not sure if this is specific to Flyingsaucer lib or LibrePDF, but for reference, if I try another font, e.g. https://fonts.google.com/noto/specimen/Noto+Serif, it works. But https://fonts.google.com/specimen/Raleway does not.

[Aleksandar Vidaković]

For reference:

https://github.com/LibrePDF/OpenPDF/issues/1273