Skip to content

Commit 298160a

Browse files
sameerkhan001sameerkhan001
committed
971891: Updated the proper code sample and install code.
1 parent ea4a03d commit 298160a

File tree

1 file changed

+121
-45
lines changed
  • Azure/HTML_to_PDF_Azure_functions/HTML_to_PDF_Azure_functions

1 file changed

+121
-45
lines changed

‎Azure/HTML_to_PDF_Azure_functions/HTML_to_PDF_Azure_functions/Function1.cs‎

Lines changed: 121 additions & 45 deletions
Original file line numberDiff line numberDiff line change
@@ -5,6 +5,7 @@
55
using Syncfusion.HtmlConverter;
66
using Syncfusion.Pdf;
77
using Syncfusion.Pdf.Graphics;
8+
using System.Diagnostics;
89
using System.Reflection;
910
using System.Runtime.InteropServices;
1011

@@ -20,58 +21,124 @@ public Function1(ILogger<Function1> logger)
2021
}
2122

2223
[Function("Function1")]
23-
public static async Task<IActionResult> Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)] HttpRequest req, ILogger log, FunctionContext executionContext)
24+
public IActionResult Run([HttpTrigger(AuthorizationLevel.Function, "get", "post")] HttpRequest req)
2425
{
25-
string blinkBinariesPath = string.Empty;
26-
//Create a new PDF document.
27-
PdfDocument document;
28-
BlinkConverterSettings settings = new BlinkConverterSettings();
29-
//Creating the stream object.
30-
MemoryStream stream;
26+
_logger.LogInformation("C# HTTP trigger function processed a request.");
3127
try
3228
{
33-
blinkBinariesPath = SetupBlinkBinaries();
34-
35-
//Initialize the HTML to PDF converter with the Blink rendering engine.
29+
byte[] pdfBytes = HtmlToPdfConvert("<p>Hello world</p>");
30+
return new FileStreamResult(new MemoryStream(pdfBytes), "application/pdf");
31+
}
32+
catch (Exception ex)
33+
{
34+
_logger.LogError(ex.Message.ToString(), "An error occurred while converting HTML to PDF.");
35+
return new ContentResult
36+
{
37+
Content = $"Error: {ex.Message}",
38+
ContentType = "text/plain",
39+
StatusCode = StatusCodes.Status500InternalServerError
40+
};
41+
42+
}
43+
44+
}
45+
public byte[] HtmlToPdfConvert(string htmlText)
46+
{
47+
if (string.IsNullOrWhiteSpace(htmlText))
48+
{
49+
throw new ArgumentException("HTML text cannot be null or empty.", nameof(htmlText));
50+
}
51+
52+
try
53+
{
54+
// Setup Blink binaries and install necessary packages
55+
var blinkBinariesPath = SetupBlinkBinaries();
56+
InstallLinuxPackages();
57+
58+
// Initialize HTML to PDF converter
3659
HtmlToPdfConverter htmlConverter = new HtmlToPdfConverter(HtmlRenderingEngine.Blink);
37-
settings.BlinkPath = blinkBinariesPath;
38-
//Assign BlinkConverter settings to the HTML converter
60+
61+
// Display settings
62+
BlinkConverterSettings settings = new BlinkConverterSettings
63+
{
64+
BlinkPath = blinkBinariesPath,
65+
ViewPortSize = new Syncfusion.Drawing.Size(1024, 768), // Set your desired viewport size
66+
Margin = new PdfMargins
67+
{
68+
Top = 20, // Set your desired margins
69+
Left = 20,
70+
Right = 20,
71+
Bottom = 20
72+
}
73+
};
3974
htmlConverter.ConverterSettings = settings;
40-
//Convert URL to PDF
41-
document = htmlConverter.Convert("http://www.syncfusion.com");
42-
stream = new MemoryStream();
43-
//Save and close the PDF document
44-
document.Save(stream);
75+
76+
// Convert HTML to PDF
77+
using (var memoryStream = new MemoryStream())
78+
{
79+
PdfDocument document = htmlConverter.Convert(htmlText, null);
80+
document.Save(memoryStream);
81+
document.Close(true);
82+
return memoryStream.ToArray();
83+
}
84+
}
85+
catch (Exception ex)
86+
{
87+
// Handle exceptions
88+
Console.WriteLine("An error occurred: " + ex.Message);
89+
throw;
90+
}
91+
}
92+
#region Install dependencies.
93+
private static void InstallLinuxPackages()
94+
{
95+
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
96+
{
97+
return;
4598
}
46-
catch(Exception ex)
99+
FileAccessPermissions ExecutableFilePermissions = FileAccessPermissions.UserRead | FileAccessPermissions.UserWrite | FileAccessPermissions.UserExecute |
100+
FileAccessPermissions.GroupRead | FileAccessPermissions.GroupExecute | FileAccessPermissions.OtherRead | FileAccessPermissions.OtherExecute;
101+
string assemblyDirectory = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
102+
//Install the dependencies packages for HTML to PDF conversion in Linux
103+
string shellFilePath = Path.Combine(assemblyDirectory);
104+
string tempBlinkDir = Path.GetTempPath();
105+
string dependenciesPath = Path.Combine(tempBlinkDir, "dependenciesInstall.sh");
106+
if (!File.Exists(dependenciesPath))
47107
{
48-
//Create a new PDF document.
49-
document = new PdfDocument();
50-
//Add a page to the document.
51-
PdfPage page = document.Pages.Add();
52-
//Create PDF graphics for the page.
53-
PdfGraphics graphics = page.Graphics;
54-
55-
//Set the standard font.
56-
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 8);
57-
//Draw the text.
58-
graphics.DrawString(ex.Message.ToString(), font, PdfBrushes.Black, new Syncfusion.Drawing.PointF(0, 0));
59-
60-
stream = new MemoryStream();
61-
//Save the document into memory stream.
62-
document.Save(stream);
63-
108+
109+
CopyFilesRecursively(shellFilePath, tempBlinkDir);
110+
var execPath = Path.Combine(tempBlinkDir, "dependenciesInstall.sh");
111+
if (File.Exists(execPath))
112+
{
113+
var code = Chmod(execPath, ExecutableFilePermissions);
114+
if (code != 0)
115+
{
116+
throw new Exception("Chmod operation failed");
117+
}
118+
}
119+
120+
Process process = new Process
121+
{
122+
StartInfo = new ProcessStartInfo
123+
{
124+
FileName = "/bin/bash",
125+
Arguments = "-c " + execPath,
126+
CreateNoWindow = true,
127+
UseShellExecute = false,
128+
}
129+
};
130+
process.Start();
131+
process.WaitForExit();
64132
}
65-
66-
document.Close();
67-
stream.Position = 0;
68-
return new FileStreamResult(stream, "application/pdf");
69133
}
70-
private static string SetupBlinkBinaries( )
134+
#endregion
135+
136+
#region Setup Blink Binaries
137+
138+
private static string SetupBlinkBinaries()
71139
{
72-
var fileInfo = new FileInfo(Assembly.GetExecutingAssembly().Location);
73-
string path = fileInfo.Directory.Parent.FullName;
74-
string blinkAppDir = Path.Combine(path, @"wwwroot");
140+
string assemblyDirectory = Path.Combine(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location), "runtimes", "linux", "native");
141+
string blinkAppDir = Path.Combine(assemblyDirectory);
75142
string tempBlinkDir = Path.GetTempPath();
76143
string chromePath = Path.Combine(tempBlinkDir, "chrome");
77144
if (!File.Exists(chromePath))
@@ -81,39 +148,46 @@ private static string SetupBlinkBinaries( )
81148
}
82149
return tempBlinkDir;
83150
}
151+
84152
private static void CopyFilesRecursively(string sourcePath, string targetPath)
85153
{
86154
//Create all the directories from the source to the destination path.
87155
foreach (string dirPath in Directory.GetDirectories(sourcePath, "*", SearchOption.AllDirectories))
88156
{
89157
Directory.CreateDirectory(dirPath.Replace(sourcePath, targetPath));
90158
}
159+
91160
//Copy all the files from the source path to the destination path.
92161
foreach (string newPath in Directory.GetFiles(sourcePath, "*.*", SearchOption.AllDirectories))
93162
{
94163
File.Copy(newPath, newPath.Replace(sourcePath, targetPath), true);
95164
}
96165
}
166+
97167
[DllImport("libc", SetLastError = true, EntryPoint = "chmod")]
98168
internal static extern int Chmod(string path, FileAccessPermissions mode);
169+
99170
private static void SetExecutablePermission(string tempBlinkDir)
100171
{
101-
FileAccessPermissions ExecutableFilePermissions = FileAccessPermissions.UserRead | FileAccessPermissions.UserWrite | FileAccessPermissions.UserExecute |
102-
FileAccessPermissions.GroupRead | FileAccessPermissions.GroupExecute | FileAccessPermissions.OtherRead | FileAccessPermissions.OtherExecute;
172+
FileAccessPermissions ExecutableFilePermissions =
173+
FileAccessPermissions.UserRead | FileAccessPermissions.UserWrite | FileAccessPermissions.UserExecute |
174+
FileAccessPermissions.GroupRead | FileAccessPermissions.GroupExecute | FileAccessPermissions.OtherRead |
175+
FileAccessPermissions.OtherExecute;
103176
string[] executableFiles = new string[] { "chrome", "chrome_sandbox" };
104177
foreach (string executable in executableFiles)
105178
{
106179
var execPath = Path.Combine(tempBlinkDir, executable);
107180
if (File.Exists(execPath))
108181
{
109-
var code = Function1.Chmod(execPath, ExecutableFilePermissions);
182+
var code = Chmod(execPath, ExecutableFilePermissions);
110183
if (code != 0)
111184
{
112185
throw new Exception("Chmod operation failed");
113186
}
114187
}
115188
}
116189
}
190+
117191
[Flags]
118192
internal enum FileAccessPermissions : uint
119193
{
@@ -127,5 +201,7 @@ internal enum FileAccessPermissions : uint
127201
UserWrite = 128,
128202
UserRead = 256
129203
}
204+
205+
#endregion
130206
}
131207
}

0 commit comments

Comments
 (0)