ExcelやPDFファイルを出力するWeb APIをAzure Container Appsで動かしてみる

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapGet("/get", () => "Hello World!");
app.Run();

app.MapGet("/excelexport", ([FromQuery(Name = "name")] string? name, 
                            HttpResponse response) =>
{
    var workbook = new Workbook();
    workbook.Worksheets[0].Range["A1"].Value = $"こんにちは、{name}！";

    using var ms = new MemoryStream();
    workbook.Save(ms, SaveFileFormat.Xlsx);

    response.Headers.Add("Content-Disposition", "attachment;filename=Result.xlsx");
    response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
    response.Body.WriteAsync(ms.ToArray());

}).WithName("GetExcelExport");

app.MapGet("/pdfexport", ([FromQuery(Name = "name")] string? name, 
                          HttpResponse response) =>
{
    var doc = new GcPdfDocument();
    var g = doc.NewPage().Graphics;

    g.DrawString($"こんにちは、{name}！",
                 new TextFormat()
                 {
                     FontName = "IPAexゴシック",
                     FontSize = 12
                 },
                 new PointF(72, 72));

    using var ms = new MemoryStream();
    doc.Save(ms, false);

    response.Headers.Add("Content-Disposition", "attachment;filename=Result.pdf");
    response.ContentType = "application/pdf";
    response.Body.WriteAsync(ms.ToArray());

}).WithName("GetPdfExport");

#See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.

FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

#フォントのインストール
RUN apt-get update && apt-get install -y wget && apt-get install -y zip unzip && apt-get install -y fontconfig
RUN wget https://moji.or.jp/wp-content/ipafont/IPAexfont/IPAexfont00401.zip
RUN unzip IPAexfont00401.zip
RUN mkdir -p /usr/share/fonts/ipa
RUN cp IPAexfont00401/*.ttf /usr/share/fonts/ipa
RUN fc-cache -fv

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY ["DioDocsWebApiAzContainerApps/DioDocsWebApiAzContainerApps.csproj", "DioDocsWebApiAzContainerApps/"]
RUN dotnet restore "DioDocsWebApiAzContainerApps/DioDocsWebApiAzContainerApps.csproj"
COPY . .
WORKDIR "/src/DioDocsWebApiAzContainerApps"
RUN dotnet build "DioDocsWebApiAzContainerApps.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "DioDocsWebApiAzContainerApps.csproj" -c Release -o /app/publish /p:UseAppHost=false

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

if (app.Environment.IsDevelopment())
{
    app.UseDeveloperExceptionPage();
}
app.UseSwagger();
app.UseSwaggerUI();