One or more errors occurred. (Unable to load shared library 'libwkhtmltox' or one of its dependencies

[svap-roshan]

Currently, I am using a Linux container, and I encountered the following error: "One or more errors occurred. (Unable to load shared library 'libwkhtmltox' or one of its dependencies)"

I have included the stack trace for further analysis.

System.DllNotFoundException: Unable to load shared library 'libwkhtmltox' or one of its dependencies. In order to help diagnose loading problems, consider using a tool like strace. If you're using glibc, consider setting the LD_DEBUG environment variable:
/app/runtimes/linux-arm64/native/libwkhtmltox.so: cannot open shared object file: No such file or directory
/usr/share/dotnet/shared/Microsoft.NETCore.App/7.0.8/libwkhtmltox.so: cannot open shared object file: No such file or directory
/app/libwkhtmltox.so: cannot open shared object file: No such file or directory
/app/runtimes/linux-arm64/native/liblibwkhtmltox.so: cannot open shared object file: No such file or directory
/usr/share/dotnet/shared/Microsoft.NETCore.App/7.0.8/liblibwkhtmltox.so: cannot open shared object file: No such file or directory
/app/liblibwkhtmltox.so: cannot open shared object file: No such file or directory
/app/runtimes/linux-arm64/native/libwkhtmltox: cannot open shared object file: No such file or directory
/usr/share/dotnet/shared/Microsoft.NETCore.App/7.0.8/libwkhtmltox: cannot open shared object file: No such file or directory
/app/libwkhtmltox: cannot open shared object file: No such file or directory
/app/runtimes/linux-arm64/native/liblibwkhtmltox: cannot open shared object file: No such file or directory
/usr/share/dotnet/shared/Microsoft.NETCore.App/7.0.8/liblibwkhtmltox: cannot open shared object file: No such file or directory
/app/liblibwkhtmltox: cannot open shared object file: No such file or directory
at DinkToPdf.WkHtmlToXBindings.wkhtmltopdf_init(Int32 useGraphics)
at DinkToPdf.PdfTools.Load()
at DinkToPdf.BasicConverter.Convert(IDocument document)
at DinkToPdf.SynchronizedConverter.<>n__0(IDocument document)
at DinkToPdf.SynchronizedConverter.<>c__DisplayClass5_0.b__0()
at System.Threading.Tasks.Task`1.InnerInvoke()
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)

Here is the code from my Dockerfile, along with the various packages I have tried in my attempts to resolve the issue.

FROM mcr.microsoft.com/dotnet/aspnet:7.0.8-bullseye-slim-arm64v8 AS base
RUN apt-get update
RUN apt-get install -y --allow-unauthenticated libgdiplus
RUN apt-get install xvfb libfontconfig wkhtmltopdf libc6-dev openssl libssl-dev -y
RUN apt-get install libxrender1 libfontconfig1 libxext-dev -y
WORKDIR /app
EXPOSE 80
# copy csproj and restore as distinct layers
FROM mcr.microsoft.com/dotnet/sdk:7.0.305-bullseye-slim-arm64v8 AS build
WORKDIR /src
COPY *.sln .
COPY ["PdfApp/PdfApp.csproj", "PdfApp/"]
RUN wget -P /src https://github.com/rdvojmoc/DinkToPdf/raw/master/v0.12.4/64%20bit/libwkhtmltox.dll
RUN wget -P /src https://github.com/rdvojmoc/DinkToPdf/raw/master/v0.12.4/64%20bit/libwkhtmltox.dylib
RUN wget -P /src https://github.com/rdvojmoc/DinkToPdf/raw/master/v0.12.4/64%20bit/libwkhtmltox.so
RUN dotnet restore "PdfApp/PdfApp.csproj"
# copy and publish app and libraries
COPY . .
WORKDIR "/src/PdfApp"
RUN dotnet build "PdfApp.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "PdfApp.csproj" -c Release -o /app/publish /p:UseAppHost=false
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "PdfApp.dll"]

The application functions properly when hosted in IIS, but encounters issues when running within a linux container.
Below DLL are present in the root directory.

libwkhtmltox.dll
libwkhtmltox.dylib
libwkhtmltox.so

[novocodev]

Did you find a solution to this, I'm having exactly the same issue on linux

[svap-roshan]

@novocodev The issue lay with my previous docker image, where I was using Debian. However, after switching to Ubuntu, the problem was resolved, and the new configuration works seamlessly. Below is my Docker file; I hope it proves useful to you. Also please make sure you have the libwkhtmltox.dll, libwkhtmltox.dylib and libwkhtmltox.so in your root directory.

FROM mcr.microsoft.com/dotnet/aspnet:7.0 AS base
RUN apt-get update && apt-get install -y --allow-unauthenticated libgdiplus
ENV ASPNETCORE_ENVIRONMENT Production
WORKDIR /app
EXPOSE 80
FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
WORKDIR /src
COPY *.sln .
COPY ["PdfApp/PdfApp.csproj", "PdfApp/"]
RUN dotnet restore "PdfApp/PdfApp.csproj"
# copy and publish app and libraries
COPY . .
WORKDIR "/src/PdfApp"
RUN dotnet build "PdfApp.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "PdfApp.csproj" -c Release -o /app/publish /p:UseAppHost=false
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "PdfApp.dll"]

[Seba2471]

I have fixed this problem in .NET 8

Needed below lines of code to dockerfile between:
FROM mcr.microsoft.com/dotnet/aspnet:8.0 AS base
RUN apt-get update
RUN apt-get install -y --allow-unauthenticated libgdiplus
RUN apt-get install xvfb libfontconfig wkhtmltopdf libc6-dev openssl libssl-dev -y
RUN apt-get install libxrender1 libfontconfig1 libxext-dev -y
USER app
WORKDIR /app
EXPOSE 8080
EXPOSE 8081

And need to have the libwkhtmltox.dll, libwkhtmltox.dylib and libwkhtmltox.so in your root directory and additional links below in the .csproj file:

	<ItemGroup>
		<None Update="libwkhtmltox.dll">
			<CopyToOutputDirectory>Always</CopyToOutputDirectory>
		</None>
		<None Update="libwkhtmltox.dylib">
			<CopyToOutputDirectory>Always</CopyToOutputDirectory>
		</None>
		<None Update="libwkhtmltox.so">
			<CopyToOutputDirectory>Always</CopyToOutputDirectory>
		</None>
	</ItemGroup>