Convert Markdown String to PDF Page with options

Technical Support Apryse SDK
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1

Using the Convert class, am I able to control the generated page’s font at all? I don’t see any options for it.

const markdownBuffer = Buffer.from(markdownString);
await PDFNet.Convert.toPdfWithBuffer(doc, markdownBuffer, ‘.md’);

In general, what is my best approach to take a string of MarkDown and convert it to a PDF page, with font options?

Thank you

2

Thank you for contacting us about this. You can use the StreamingPDFConversion API to add font face information (along with size, etc).

Refer to the code below:

try {
           // Add a dictionary
        const set = await PDFNet.ObjSet.create();
        const options = await set.createDict();

        // Put options
        await options.putNumber('FontSize', 15);
        await options.putName('FontFace', 'Ariel'); // font face
        await options.putString('FileExtension', '.md'); // add extension here

        const filterFromBuffer = await PDFNet.Filter.createFromMemory(data); // load buffer 

        const documentConversion = await PDFNet.Convert.streamingPdfConversionWithFilter(filterFromBuffer, options);
        console.log('test');
        while (await documentConversion.getConversionStatus() == 1) { // conversion incomplete
            console.log('converting page');
            await documentConversion.convertNextPage();  
        }

        if (await documentConversion.getConversionStatus() == 0) { // conversion success
            console.log('done. saving doc');
            const pdfFile = await documentConversion.getDoc()
            await pdfFile.save("./output.pdf", PDFNet.SDFDoc.SaveOptions.e_linearized); // optionally you can save the document to a filter too
        }
        else {
          console.log('conversion error');
          console.log(await documentConversion.getErrorString())
        }
      } catch (err) {
        console.log(err);
      }

    console.log('Done.');

Please let me know if this works for you.

3

Thank you, I’ll give it a try. But just looking at your code, pdfDoc is unused… Would I have to run a copy page operation on the finished conversion pdfFile and append those manually in a loop? It would be really great if the API could be updated to just provide options to Convert.toPdfWithBuffer :confused: Also, if this works, the documentation for Convert.streamingPdfConversionWithFilter should be updated to include all the file types it can handle.

4

Yea, I don’t think the filter can accept Markdown:

conversion error
document layout failed: Exception: 
         Message: Invalid UTF8 data
         Conditional expression: (utf8In[i] & UINT32_C(0xC0)) == UINT32_C(0x80)
         Version      : 9.4.0-29d3f4dfa4
         Platform     : OSX
         Architecture : Arm
         Filename     : UnicodeUtils.cpp
         Function     : CodePoint_from_UTF8_Multi
         Linenumber   : 1503
5

Apologies for the delay. I was able to reproduce a similar error and have forwarded this to the team for further investigation. I will get back to you as soon as I have an update on this.

6

Thank you, but further help is not needed. I was able to solve this via help in a support ticket ( #46546). I was using the wrong method on Convert; fromTextWithBuffer allows an options dictionary as 3rd param.

The solution snippet:

    const optionsObjSet = await PDFNet.ObjSet.create();
    const optionsDict = await optionsObjSet.createDict();
    await optionsDict.putString('FontFace', 'Helvetica');

    const markdownBuffer = Buffer.from(attachmentPage?.markdown);

    await PDFNet.Convert.fromTextWithBuffer(
      filledDoc,
      markdownBuffer,
      optionsDict
    );