PDF to image not working in Azure about docnet HOT 5 CLOSED

Hi,

Yes, you are correct, the example there uses System.Drawing.Common and you would need to install dependencies on your azure environment if you want to use it. I am currently on holiday so will not get around to implementing anything in SkiaSharp for a few weeks at least. If you are in a hurry, the image format that docnet returns is a BGRA raw byte array, I have found this helpful github issue that will help you if you want to try and do it yourself.

from docnet.

Hi,

I tested further and found that GetText() function is also not working in Azure Web App.

I checked further and realized that the pdfium.dll dependency for Docnet.dll actually linked to gdi32.dll. I read from the following link that Azure sandbox actually block any dependency to GDI calls
https://github.com/projectkudu/kudu/wiki/Azure-Web-App-sandbox

If this is the case, it could simply mean we will not be able to use Docnet in Azure Web App. Though it works perfectly fine in IIS deployment locally.

from docnet.

Yes, that is correct, PDFium uses GDI in a couple of places when running on Windows. This, however, is not an issue on Linux since pdfium.so doesn't need GDI. If you can't run on Linux or use GDI, unfortunately, there are only two alternatives:

1. Try to compile PDFium without GDI dependencies
2. Try to find some other library that doesn't use GDI

Hope this helps.

Thanks,

Modestas

from docnet.

It seems it is quite impossible to remove GDI dependencies from PDFium. Seems the only way is to find another library. :-(

Thanks.

from docnet.

I will be closing this feature request since we can't realistically expect to remove GDI dependencies from windows build of PDFium. Suggested workaround if running on Azure and the project supports netstandard is to try and run on Linux.

from docnet.