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GroupDocs.Parser not working on Linux

Hello! I am trying to use groupdocs.Parser in .NET to parse some images from a word document. When I run this on Windows 10 there is no issue and everything works smoothly.

However when running this on Linux I am getting an exception because there is an internal dependency to System.Drawing which is no longer supported for linux. I have installed all other packages and dependencies that are mentioned in the installation page but this problem seems to persist. Is there a workaround that does not involve System.Drawing since it no longer supports Linux?

@maritinaTsanta

Please share following details and we’ll look into this scenario:

  • OS version
  • API version that you are evaluating (e.g. 19.10, 21.1)
  • Complete stack trace of this issue

@Atir_Tahir

Thank you for the quick reply!
The API version I am using is 22.2.0
My service is running on Ubuntu server 20.04 LTS.
The stack trace for this issue is:

  Exception #0

Type : System.TypeInitializationException, System.Private.CoreLib
Message : The type initializer for ‘Gdip’ threw an exception.
StackTrace :
at System.Drawing.SafeNativeMethods.Gdip.GdipCreateMatrix2(Single m11, Single m12, Single m21, Single m22, Single dx, Single dy, IntPtr& matrix)
at Aspose.Pdf.ImagePlacementAbsorber.#=zLvshk2o=(Page #=z33S4xiY=, OperatorCollection #=zom8hpA4=, Resources #=zYv0iFbY=)
at Aspose.Pdf.ImagePlacementAbsorber.Visit(Page page)
at .(Int32 , PageAreaOptions )
at .(Nullable1 , PageAreaOptions ) at .(Nullable1 , PageAreaOptions )
at GroupDocs.Parser.Parser.GetImages()
at Yodiwo.FEMP.Libraries.ReportingManagement.Render.GetGraphFromReport(Byte[] doc, ILogger logger) in C:\DEV\yodifem\uServicesScoped\Libraries\Yodiwo.FEMP.Libraries.ReportingManagement\Render.cs:line 130


   Exception #0.0

Type : System.PlatformNotSupportedException, System.Private.CoreLib
Message : System.Drawing.Common is not supported on non-Windows platforms. See https://aka.ms/systemdrawingnonwindows for more information.
StackTrace :
at System.Drawing.LibraryResolver.EnsureRegistered()
at System.Drawing.SafeNativeMethods.Gdip.PlatformInitialize()
at System.Drawing.SafeNativeMethods.Gdip…cctor()

@maritinaTsanta

We are investigating this scenario. Your investigation ticket ID is PARSERNET-1881. We’ll let you know if any further details are required.

@maritinaTsanta

Could you please share following details:

  1. Code snippet using that issue could be reprdouced
  2. The version of System.Drawing.Common which is used in the project

This is the code that produces the error, the input doc for this function is a byte array of a pdf document. I do not use System.Drawing.Common anywhere in my project, its appearance in the exception is, from my understanding, due to the groupdocs.Parser reference to that package:
image.png (16.3 KB)

 private static byte[] GetGraphFromReport(byte[] doc, ILogger logger)
    {
        try
        {
            Stream stream = new MemoryStream(doc);

            using (Parser parser = new Parser(stream))
            {
                // Extract images
                IEnumerable<PageImageArea> images = parser.GetImages();
                // Check if image extraction is supported 
                if (images == null)
                {
                    logger.LogError(null, "Images extraction isn't supported");
                }

                // Iterate over images
                byte[] res = null;

                foreach (PageImageArea image in images)
                {
                    // Save each image
                    using (MemoryStream ms = new MemoryStream())
                    {
                        image.GetImageStream().CopyTo(ms);
                        res = ms.ToArray();
                    }

                }
                return res;
            }
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Error when trying extract images");
            DebugEx.TraceErrorException(ex);
            return null;
        }
    }

@maritinaTsanta

We are further investigating this scenario. You’ll be notified in case of any progress update.

@maritinaTsanta

We have a workaround for the issue with System.Drawing.Common.

Create runtimeconfig.template.json file at the project root folder with the following content:

{
  "configProperties": {
    "System.Drawing.EnableUnixSupport": true
  }
}