Cara menjalankan Aspose.PDF for .NET 6 di Docker

Prasyarat

Contoh berikut diuji dengan:

  • Docker v.20.10.11 dan Docker Desktop 4.3.2.
  • Visual Studio 2022 Community Edition v.17.0.5.
  • .NET 6 SDK digunakan dalam contoh yang diberikan di bawah ini.
  • Aspose.PDF for .NET v.22.01.

Buat aplikasi contoh untuk Kontainer Docker Linux

  1. Luncurkan Visual Studio 2022 dan pilih template ASP.NET Core Web App (Model-View-Controller) dan tekan Next.
  2. Di jendela Konfigurasi proyek baru Anda, atur nama dan lokasi proyek yang diinginkan dan tekan Next.
  3. Di jendela Informasi tambahan, pilih .NET 6.0 (Dukungan jangka panjang) dan aktifkan dukungan Docker. Anda juga dapat mengatur Docker OS ke Linux jika diperlukan.
  4. Tekan Create.
  5. Pilih Tools->Nuget Package Manager->Package Manager Console dan instal Aspose.PDF for .NET (gunakan perintah Install-Package Aspose.PDF).

Hasilkan dokumen PDF menggunakan ASP.NET Core Web App di kontainer Linux

Kami akan menggunakan kode dari Contoh Kompleks dalam aplikasi ini. Silakan ikuti tautan ini untuk penjelasan yang lebih rinci.

  1. Buat folder images di folder wwwroot dan letakkan gambar logo.png. Anda dapat mengunduh gambar ini dari sini.
  2. Ganti kode di HomeController.cs dengan cuplikan berikut (harap dicatat bahwa Anda dapat memiliki namespace lain):

Cuplikan kode berikut juga berfungsi dengan pustaka Aspose.PDF.Drawing.

using Aspose.Pdf;
using Aspose.Pdf.Text;
using Docker.Linux.Demo01.Models;
using Microsoft.AspNetCore.Mvc;
using System.Diagnostics;

namespace Docker.Linux.Demo01.Controllers
{
    public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;
        private readonly IWebHostEnvironment _appEnvironment;

        public HomeController(ILogger<HomeController> logger, IWebHostEnvironment appEnvironment)
        {
            _logger = logger;
            _appEnvironment = appEnvironment;
        }

        public IActionResult Index()
        {
            return View();
        }
        
        public IActionResult Generate()
        {
            const string file_type = "application/pdf";
            const string file_name = "sample.pdf";
            var memoryStream = new MemoryStream();

            _logger.LogInformation("Start");
            // Initialize document object
            using (var document = new Aspose.Pdf.Document())
            {
                // Add page
                var page = document.Pages.Add();

                // Add image
                var imageFileName = Path.Combine(_appEnvironment.WebRootPath, "images", "logo.png");
                page.AddImage(imageFileName, new Rectangle(20, 730, 120, 830));

                // -------------------------------------------------------------
                // Add Header
                var header = new TextFragment("New ferry routes in Fall 2020");
                header.TextState.Font = FontRepository.FindFont("Arial");
                header.TextState.FontSize = 24;
                header.HorizontalAlignment = HorizontalAlignment.Center;
                header.Position = new Position(130, 720);
                page.Paragraphs.Add(header);

                // Add description
                var descriptionText = "Visitors must buy tickets online and tickets are limited to 5,000 per day. Ferry service is operating at half capacity and on a reduced schedule. Expect lineups.";
                var description = new TextFragment(descriptionText);
                description.TextState.Font = FontRepository.FindFont("Times New Roman");
                description.TextState.FontSize = 14;
                description.HorizontalAlignment = HorizontalAlignment.Left;
                page.Paragraphs.Add(description);

                // Add table
                var table = new Table
                {
                    ColumnWidths = "200",
                    Border = new BorderInfo(BorderSide.Box, 1f, Color.Black),
                    DefaultCellBorder = new BorderInfo(BorderSide.Box, 0.5f, Color.Gray),
                    DefaultCellPadding = new MarginInfo(4.5, 4.5, 4.5, 4.5),
                    Margin =
                    {
                        Top = 10,
                        Bottom = 10
                    },
                    DefaultCellTextState =
                    {
                        Font =  FontRepository.FindFont("Helvetica")
                    }
                };

                var headerRow = table.Rows.Add();
                headerRow.Cells.Add("Departs City");
                headerRow.Cells.Add("Departs Island");
                foreach (Cell headerRowCell in headerRow.Cells)
                {
                    headerRowCell.BackgroundColor = Color.LightGray;
                    headerRowCell.DefaultCellTextState.ForegroundColor = Color.FromRgb(0.1, 0.1, 0.1);
                }

                var time = new TimeSpan(6, 0, 0);
                var incTime = new TimeSpan(0, 30, 0);
                for (int i = 0; i < 10; i++)
                {
                    var dataRow = table.Rows.Add();
                    dataRow.Cells.Add(time.ToString(@"hh\:mm"));
                    time = time.Add(incTime);
                    dataRow.Cells.Add(time.ToString(@"hh\:mm"));
                }

                page.Paragraphs.Add(table);

                document.Save(memoryStream);
            }
            _logger.LogInformation("Finish");
            return File(memoryStream, file_type, file_name);
        }

        public IActionResult Privacy()
        {
            return View();
        }

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }
}
  1. Ganti konten di Dockerfile dengan konten berikut:
FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
RUN apt-get update && apt-get install -y libgdiplus
RUN sed -i'.bak' 's/$/ contrib/' /etc/apt/sources.list
RUN apt-get update; apt-get install -y ttf-mscorefonts-installer fontconfig

WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY ["Docker.Linux.Demo01/Docker.Linux.Demo01.csproj", "Docker.Linux.Demo01/"]
RUN dotnet restore "Docker.Linux.Demo01/Docker.Linux.Demo01.csproj"
COPY . .
WORKDIR "/src/Docker.Linux.Demo01"
RUN dotnet build "Docker.Linux.Demo01.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "Docker.Linux.Demo01.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "Docker.Linux.Demo01.dll"]

Buat aplikasi contoh untuk Kontainer Docker Windows

  1. Luncurkan Visual Studio 2022 dan pilih template ASP.NET Core Web App (Model-View-Controller) dan tekan Next.
  2. Di jendela Konfigurasi proyek baru Anda, atur nama dan lokasi proyek yang diinginkan dan tekan Next.
  3. Di jendela Informasi tambahan, pilih .NET 6.0 (Dukungan jangka panjang) dan aktifkan dukungan Docker. Jika diperlukan, Anda juga dapat mengatur Docker OS ke Windows.
  4. Tekan Create.
  5. Pilih Tools->Nuget Package Manager->Package Manager Console dan instal Aspose.PDF for .NET (gunakan perintah Install-Package Aspose.PDF).

Hasilkan dokumen PDF menggunakan ASP.NET Core Web App di kontainer Windows

Kami akan menggunakan kode yang sama seperti di contoh sebelumnya.

  1. Buat folder images di folder wwwroot dan letakkan gambar logo.png. Anda dapat mengunduh gambar ini dari sini.
  2. Ganti kode di HomeController.cs dengan cuplikan di atas.
FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:6.0.101-nanoserver-ltsc2022 AS build
WORKDIR /src
COPY ["Docker.Windows.Demo01/Docker.Windows.Demo01.csproj", "Docker.Windows.Demo01/"]
RUN dotnet restore "Docker.Windows.Demo01/Docker.Windows.Demo01.csproj"
COPY . .
WORKDIR "/src/Docker.Windows.Demo01"
RUN dotnet build "Docker.Windows.Demo01.csproj" -c Release -o /app/build -r win-x64 --self-contained true

FROM build AS publish
RUN dotnet publish "Docker.Windows.Demo01.csproj" -c Release -o /app/publish -r win-x64 --self-contained true

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "Docker.Windows.Demo01.dll"]
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