Detailed explanation of the Sidecar mode in Docker Compose

xlsx.SetCellValue("Sheet1", "C3", student.Major.Name)
xlsx.SetCellValue("Sheet1", "F3", student.ClassInfo.Name)
xlsx.SetCellValue("Sheet1", "J3", student.SchoolSystem)
 
xlsx.SetCellValue("Sheet1", "B4", student.Name)
xlsx.SetCellValue("Sheet1", "D4", student.BeforName)
xlsx.SetCellValue("Sheet1", "F4", student.Gender)
xlsx.SetCellValue("Sheet1", "H4", student.Nation)
 
xlsx.SetCellValue("Sheet1", "B5", student.IdCardNo)
xlsx.SetCellValue("Sheet1", "F5", student.HomePlace)
 
xlsx.SetCellValue("Sheet1", "B6", student.Birthday.Format("20060102"))
xlsx.SetCellValue("Sheet1", "D6", student.EntranceTime.Format("20060102"))
xlsx.SetCellValue("Sheet1", "F6", student.JoinTeamTime)
 
xlsx.SetCellValue("Sheet1", "B7", student.FamilyAddress)
xlsx.SetCellValue("Sheet1", "F7", student.HealthStatus)

[Route("[controller]")]
    public class PDFController : ControllerBase
    {
        private readonly ILogger<PDFController> _logger;
        public PDFController(ILogger<PDFController> logger)
        {
            _logger = logger;
        }

        [HttpPost]
        public async Task<IActionResult> HttpPostAsync()
        {
            try
            {
                Stream stream = Request.Body;
                byte[] buffer = new byte[Request.ContentLength.Value];
                stream.Position = 0L;
                stream.ReadAsync(buffer, 0, buffer.Length);
                Workbook wb = new Workbook();
                wb.LoadFromStream(stream);
                Worksheet ws = wb.Worksheets[0];
                var streamReturn = new MemoryStream();

                ws.SaveToPdfStream(streamReturn);
                return File(streamReturn, "application/octet-stream");
            }
            catch (Exception ex)
            {
                _logger.LogError("", ex);
                return BadRequest(ex.Message);
            }
        }
    }

response, err := http.Post("http://127.0.0.1:6081/PDF", "multipart/form-data;boundary="+multipart.NewWriter(bytes.NewBufferString("")).Boundary(), bytes.NewReader(byteA))
if err != nil {
    c.Bad(err.Error())
    return
}
defer response.Body.Close()
if response.StatusCode != 200 {
    data, _ := ioutil.ReadAll(response.Body)
    c.Bad(string(data))
    return
}
 
pdfFilePth := fmt.Sprintf("./templates/tmp/%s.pdf", uuid.New())
f, err := os.Create(pdfFilePth)
if err != nil {
    c.Bad(err.Error())
    return
}
io.Copy(f, response.Body)
c.Ctx.Output.Download(pdfFilePth, "data.xlsx")

FROM library/golang
 
WORKDIR /app
RUN go env -w GO111MODULE=on
RUN go env -w GOPROXY=https://goproxy.cn,direct
ADD api/ /app
RUN cd /app
RUN go mod tidy
RUN go build main.go
ENTRYPOINT ["/app/main"]
EXPOSE 6080

#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
RUN apt-get update
RUN apt-get install -y --no-install-recommends libgdiplus libc6-dev 
RUN apt-get install -y fontconfig xfonts-utils
COPY /pdfprocessor/fonts/ /usr/share/fonts/
RUN mkfontscale
RUN mkfontdir
RUN fc-cache -fv

WORKDIR /app
EXPOSE 6081

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

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

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

version: '3.4'

services:
  pdfprocessor:
    image: pdfprocessor
    build:
      context: .
      dockerfile: pdfprocessor/Dockerfile
    depends_on:
      - eduadmin
    network_mode: "service:eduadmin"
  eduadmin:
    image: eduadmin
    build:
      context: .
      dockerfile: api/Dockerfile
    ports:
      - "6080:6080"
      - "6088:6088"