971891: Updated the proper code sample and install code.

Azure/HTML_to_PDF_Azure_functions/HTML_to_PDF_Azure_functions/Function1.cs

@@ -5,6 +5,7 @@
 using Syncfusion.HtmlConverter;
 using Syncfusion.Pdf;
 using Syncfusion.Pdf.Graphics;
+using System.Diagnostics;
 using System.Reflection;
 using System.Runtime.InteropServices;
 
@@ -20,58 +21,124 @@ public Function1(ILogger<Function1> logger)
         }
 
         [Function("Function1")]
-        public static async Task<IActionResult> Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req, ILogger log, FunctionContext executionContext)
+        public IActionResult Run([HttpTrigger(AuthorizationLevel.Function, "get", "post")] HttpRequest req)
         {
-            string blinkBinariesPath = string.Empty;
-            //Create a new PDF document.
-            PdfDocument document;
-            BlinkConverterSettings settings = new BlinkConverterSettings();
-            //Creating the stream object.
-            MemoryStream stream;
+            _logger.LogInformation("C# HTTP trigger function processed a request.");
             try
             {
-                blinkBinariesPath = SetupBlinkBinaries();              
-
-                //Initialize the HTML to PDF converter with the Blink rendering engine.
+                byte[] pdfBytes = HtmlToPdfConvert("<p>Hello world</p>");
+                return new FileStreamResult(new MemoryStream(pdfBytes), "application/pdf");
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex.Message.ToString(), "An error occurred while converting HTML to PDF.");
+                return new ContentResult
+                {
+                    Content = $"Error: {ex.Message}",
+                    ContentType = "text/plain",
+                    StatusCode = StatusCodes.Status500InternalServerError
+                };
+
+            }
+
+        }
+        public byte[] HtmlToPdfConvert(string htmlText)
+        {
+            if (string.IsNullOrWhiteSpace(htmlText))
+            {
+                throw new ArgumentException("HTML text cannot be null or empty.", nameof(htmlText));
+            }
+
+            try
+            {
+                // Setup Blink binaries and install necessary packages
+                var blinkBinariesPath = SetupBlinkBinaries();
+                InstallLinuxPackages();
+
+                // Initialize HTML to PDF converter
                 HtmlToPdfConverter htmlConverter = new HtmlToPdfConverter(HtmlRenderingEngine.Blink);
-                settings.BlinkPath = blinkBinariesPath;
-                //Assign BlinkConverter settings to the HTML converter 
+
+                // Display settings
+                BlinkConverterSettings settings = new BlinkConverterSettings
+                {
+                    BlinkPath = blinkBinariesPath,
+                    ViewPortSize = new Syncfusion.Drawing.Size(1024, 768), // Set your desired viewport size
+                    Margin = new PdfMargins
+                    {
+                        Top = 20, // Set your desired margins
+                        Left = 20,
+                        Right = 20,
+                        Bottom = 20
+                    }
+                };
                 htmlConverter.ConverterSettings = settings;
-                //Convert URL to PDF
-                 document = htmlConverter.Convert("http://www.syncfusion.com");
-                stream = new MemoryStream();
-                //Save and close the PDF document  
-                document.Save(stream);
+
+                // Convert HTML to PDF
+                using (var memoryStream = new MemoryStream())
+                {
+                    PdfDocument document = htmlConverter.Convert(htmlText, null);
+                    document.Save(memoryStream);
+                    document.Close(true);
+                    return memoryStream.ToArray();
+                }
+            }
+            catch (Exception ex)
+            {
+                // Handle exceptions
+                Console.WriteLine("An error occurred: " + ex.Message);
+                throw;
+            }
+        }
+        #region Install dependencies.
+        private static void InstallLinuxPackages()
+        {
+            if (!RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+            {
+                return;
             }
-            catch(Exception ex)
+            FileAccessPermissions ExecutableFilePermissions = FileAccessPermissions.UserRead | FileAccessPermissions.UserWrite | FileAccessPermissions.UserExecute |
+           FileAccessPermissions.GroupRead | FileAccessPermissions.GroupExecute | FileAccessPermissions.OtherRead | FileAccessPermissions.OtherExecute;
+            string assemblyDirectory = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
+            //Install the dependencies packages for HTML to PDF conversion in Linux
+            string shellFilePath = Path.Combine(assemblyDirectory);
+            string tempBlinkDir = Path.GetTempPath();
+            string dependenciesPath = Path.Combine(tempBlinkDir, "dependenciesInstall.sh");
+            if (!File.Exists(dependenciesPath))
             {
-                //Create a new PDF document.
-                 document = new PdfDocument();
-                //Add a page to the document.
-                PdfPage page = document.Pages.Add();
-                //Create PDF graphics for the page.
-                PdfGraphics graphics = page.Graphics;
-
-                //Set the standard font.
-                PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 8);
-                //Draw the text.
-                graphics.DrawString(ex.Message.ToString(), font, PdfBrushes.Black, new Syncfusion.Drawing.PointF(0, 0));
-
-                stream = new MemoryStream();
-                //Save the document into memory stream.
-                document.Save(stream);
-
+
+                CopyFilesRecursively(shellFilePath, tempBlinkDir);
+                var execPath = Path.Combine(tempBlinkDir, "dependenciesInstall.sh");
+                if (File.Exists(execPath))
+                {
+                    var code = Chmod(execPath, ExecutableFilePermissions);
+                    if (code != 0)
+                    {
+                        throw new Exception("Chmod operation failed");
+                    }
+                }
+
+                Process process = new Process
+                {
+                    StartInfo = new ProcessStartInfo
+                    {
+                        FileName = "/bin/bash",
+                        Arguments = "-c " + execPath,
+                        CreateNoWindow = true,
+                        UseShellExecute = false,
+                    }
+                };
+                process.Start();
+                process.WaitForExit();
             }
-
-            document.Close();
-            stream.Position = 0;
-            return new FileStreamResult(stream, "application/pdf");
         }
-        private static string SetupBlinkBinaries( )
+        #endregion
+
+        #region Setup Blink Binaries
+
+        private static string SetupBlinkBinaries()
         {
-            var fileInfo = new FileInfo(Assembly.GetExecutingAssembly().Location);
-            string path = fileInfo.Directory.Parent.FullName;
-            string blinkAppDir = Path.Combine(path, @"wwwroot");
+            string assemblyDirectory = Path.Combine(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location), "runtimes", "linux", "native");
+            string blinkAppDir = Path.Combine(assemblyDirectory);
             string tempBlinkDir = Path.GetTempPath();
             string chromePath = Path.Combine(tempBlinkDir, "chrome");
             if (!File.Exists(chromePath))
@@ -81,39 +148,46 @@ private static string SetupBlinkBinaries( )
             }
             return tempBlinkDir;
         }
+
         private static void CopyFilesRecursively(string sourcePath, string targetPath)
         {
             //Create all the directories from the source to the destination path.
             foreach (string dirPath in Directory.GetDirectories(sourcePath, "*", SearchOption.AllDirectories))
             {
                 Directory.CreateDirectory(dirPath.Replace(sourcePath, targetPath));
             }
+
             //Copy all the files from the source path to the destination path.
             foreach (string newPath in Directory.GetFiles(sourcePath, "*.*", SearchOption.AllDirectories))
             {
                 File.Copy(newPath, newPath.Replace(sourcePath, targetPath), true);
             }
         }
+
         [DllImport("libc", SetLastError = true, EntryPoint = "chmod")]
         internal static extern int Chmod(string path, FileAccessPermissions mode);
+
         private static void SetExecutablePermission(string tempBlinkDir)
         {
-            FileAccessPermissions ExecutableFilePermissions = FileAccessPermissions.UserRead | FileAccessPermissions.UserWrite | FileAccessPermissions.UserExecute |
-            FileAccessPermissions.GroupRead | FileAccessPermissions.GroupExecute | FileAccessPermissions.OtherRead | FileAccessPermissions.OtherExecute;
+            FileAccessPermissions ExecutableFilePermissions =
+                FileAccessPermissions.UserRead | FileAccessPermissions.UserWrite | FileAccessPermissions.UserExecute |
+                FileAccessPermissions.GroupRead | FileAccessPermissions.GroupExecute | FileAccessPermissions.OtherRead |
+                FileAccessPermissions.OtherExecute;
             string[] executableFiles = new string[] { "chrome", "chrome_sandbox" };
             foreach (string executable in executableFiles)
             {
                 var execPath = Path.Combine(tempBlinkDir, executable);
                 if (File.Exists(execPath))
                 {
-                    var code = Function1.Chmod(execPath, ExecutableFilePermissions);
+                    var code = Chmod(execPath, ExecutableFilePermissions);
                     if (code != 0)
                     {
                         throw new Exception("Chmod operation failed");
                     }
                 }
             }
         }
+
         [Flags]
         internal enum FileAccessPermissions : uint
         {
@@ -127,5 +201,7 @@ internal enum FileAccessPermissions : uint
             UserWrite = 128,
             UserRead = 256
         }
+
+        #endregion
     }
 }

Azure/HTML_to_PDF_Azure_functions/HTML_to_PDF_Azure_functions/HTML_to_PDF_Azure_functions.csproj

@@ -17,11 +17,14 @@
     <PackageReference Include="Syncfusion.HtmlToPdfConverter.Net.Linux" Version="*" />
   </ItemGroup>
   <ItemGroup>
+    <None Update="dependenciesInstall.sh">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Update="host.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
     <None Update="local.settings.json">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
       <CopyToPublishDirectory>Never</CopyToPublishDirectory>
     </None>
   </ItemGroup>

Azure/HTML_to_PDF_Azure_functions/HTML_to_PDF_Azure_functions/dependenciesInstall.sh

@@ -0,0 +1 @@
+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