Using HTML to PDF converter in alpine docker container

[Erick]

Hello,

I would like to use the HTML to PDF converter in an alpine docker container. The help page https://help.syncfusion.com/file-formats/pdf/convert-html-to-pdf/docker mentions the following command to install required libraries:

RUN apt-get update && \

apt-get install -yq --no-install-recommends \

libasound2 libatk1.0-0 libc6 libcairo2 libcups2 libdbus-1-3 \

libexpat1 libfontconfig1 libgcc1 libgconf-2-4 libgdk-pixbuf2.0-0 libglib2.0-0 libgtk-3-0 libnspr4 \

libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 \

libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 \

libnss3 libgbm1

What is the equivalent for alpine?

Thanks,

Erick

[Karmegam Seerangan]

Hi Erick,

Thanks for contacting Syncfusion support,

We can use our Blink rendering engine in Alpine Linux docker images. Please refer below links for more information about the Blink rendering engine.

UG: https://help.syncfusion.com/file-formats/pdf/convert-html-to-pdf/blink

KB: https://www.syncfusion.com/kb/11299/how-to-convert-html-to-pdf-using-blink-in-linux-docker

Sample link: https://www.syncfusion.com/downloads/support/directtrac/general/ze/BlinkAlpineDockerNet7738854080

We can convert HTML to PDF in Alpine-based Images using the below docker file by installing the chromium in Alpine Linux. please try this on your side and let us know the result.

FROM mcr.microsoft.com/dotnet/aspnet:7.0-alpine3.17 AS base

RUN apk update && \

  apk upgrade && \

  apk add --update ca-certificates && \

  apk add chromium --update-cache --repository http://nl.alpinelinux.org/alpine/edge/community \

  rm -rf /var/cache/apk/*

WORKDIR /app

EXPOSE 80

EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:7.0-alpine AS build

WORKDIR /src

COPY ["BlinkAlpineDockerNet7/BlinkAlpineDockerNet7.csproj", "BlinkAlpineDockerNet7/"]

RUN dotnet restore "BlinkAlpineDockerNet7/BlinkAlpineDockerNet7.csproj"

COPY . .

WORKDIR "/src/BlinkAlpineDockerNet7"

RUN dotnet build "BlinkAlpineDockerNet7.csproj"-c Release -o /app/build

FROM build AS publish

RUN dotnet publish "BlinkAlpineDockerNet7.csproj"-c Release -o /app/publish /p:UseAppHost=false

FROM base AS final

WORKDIR /app

COPY --from=publish /app/publish .

ENTRYPOINT ["dotnet", "BlinkAlpineDockerNet7.dll"]

We need to install the below package in the docker image and we should use the BlinkBinaries folder from the Chromium installed location. For example, chromium installed location is “/usr/lib/chromium”. The below commands will install the chromium for Alpine docker, we can use the same for the conversion.   

RUN apk update && \

  apk upgrade && \

  apk add --update ca-certificates && \

  apk add chromium --update-cache --repository http://nl.alpinelinux.org/alpine/edge/community \

  rm -rf /var/cache/apk/*

Code snippet:

BlinkConverterSettings settings = new BlinkConverterSettings();

//Set Blink path

settings.BlinkPath = "/usr/lib/chromium";

Please try the above solution and let us know the result.  

Regards,

Karmegam