GroupDocs.Parser not working on Linux

GroupDocs.Parser Product Family
1

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?

2

@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
3

@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 Breaking change: System.Drawing.Common only supported on Windows - .NET | Microsoft Learn for more information.
StackTrace :
at System.Drawing.LibraryResolver.EnsureRegistered()
at System.Drawing.SafeNativeMethods.Gdip.PlatformInitialize()
at System.Drawing.SafeNativeMethods.Gdip…cctor()

4

@maritinaTsanta

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

5

@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
6

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;
        }
    }
7

@maritinaTsanta

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

8

@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
  }
}