c# - 在 ASP.NET Core 中使用 wkhtmltopdf、docker 将 HTML 转换为 PDF

Question

我正在尝试在 ASP.NET Core 应用程序中使用 wkhtmltopdf 将 HTML 转换为 PDF。我已将 wkhtmltopdf.exe 添加到我的项目中，并标记为“始终复制到输出”。

这是我的代码:

var htmlContent = receiptBody;
var wkhtmltopdf = new FileInfo(@"/app/Configuration/Wkhtmltopdf/wkhtmltopdf.exe");
var converter = new HtmlToPdfConverter(wkhtmltopdf);
var pdfBytes = converter.ConvertToPdf(htmlContent);

该文件已创建，但位于:

var pdfBytes = converter.ConvertToPdf(htmlContent);

我收到错误:

System.Exception: Cannot generate PDF: Broken pipe --->System.IO.IOException: Broken pipe

我使用 Docker 运行我的应用程序，这是我的 dockerfile:

FROM microsoft/aspnetcore:1.1.2 ARG source WORKDIR /app 
ENV ASPNETCORE_URLS http://project-test:80 
EXPOSE 80 
COPY ${source:-obj/Docker/publish} . 
RUN apt-get update 
RUN apt-get install-y libgdiplus 
ENTRYPOINT ["dotnet", "ProjectTest.dll"]

也许应该以某种方式为 Linux 安装 wkhtmltopdf？

Answer 1

这段代码对于我来说在最新的 .net core 6.0.1 镜像上工作得很好:

FROM mcr.microsoft.com/dotnet/aspnet:6.0.1-bullseye-slim AS base
RUN apt update
RUN apt install -y libgdiplus
RUN ln -s /usr/lib/libgdiplus.so /lib/x86_64-linux-gnu/libgdiplus.so
RUN apt-get install -y --no-install-recommends zlib1g fontconfig libfreetype6 libx11-6 libxext6 libxrender1 wget gdebi
RUN wget https://github.com/wkhtmltopdf/wkhtmltopdf/releases/download/0.12.5/wkhtmltox_0.12.5-1.stretch_amd64.deb
RUN gdebi --n wkhtmltox_0.12.5-1.stretch_amd64.deb
RUN apt install libssl1.1
RUN ln -s /usr/local/lib/libwkhtmltox.so /usr/lib/libwkhtmltox.so

WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:6.0.1 AS build
WORKDIR /src
COPY ["docgen/docgen.csproj", "docgen/"]
RUN dotnet restore "docgen/docgen.csproj"
COPY . .
WORKDIR "/src/docgen"
RUN dotnet build "docgen.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "docgen.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "docgen.dll"]