c# - Azure Function : system. private.corelib:执行函数时出现异常

Question

我正在编写一个用于 PDF 转换的 Azure 函数，它依赖于 DataLogics PDF 转换和用于密码生成的 Nuget 包 (mlkpwgen)。

函数是

using System.IO;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Azure.WebJobs.Host;
using Newtonsoft.Json;
using System;
using MlkPwgen;
using Datalogics.PDFL;
using System.Diagnostics;

namespace FunctionApp1   
{
public static class Function1
{

    [FunctionName("Function1")]
    public static IActionResult Run([HttpTrigger(AuthorizationLevel.Function, "get", "post", Route = null)]HttpRequest req, TraceWriter log)
    {
        log.Info("C# HTTP trigger function processed a request.");

        string name = req.Query["name"];
        PDFConversion();
        string requestBody = new StreamReader(req.Body).ReadToEnd();
        dynamic data = JsonConvert.DeserializeObject(requestBody);
        name = name ?? data?.name;

        return name != null
            ? (ActionResult)new OkObjectResult($"Hello, {name}")
            : new BadRequestObjectResult("Please pass a name on the query string or in the request body");
    }

    public static string PDFConversion()
    {
        using (Library lib = new Library())
        {


            String sInput = @"C:\Users\Kunal\Downloads\Indian Management.pdf";
            String sOutput = @"C:\Users\Kunal\Downloads\WatermarkedOutput.pdf";


            Document doc = new Document(sInput);
            string ownerPassword = PasswordGenerator.Generate(length: 32);
            string userPassword = PasswordGenerator.Generate(length: 32);
            doc.Secure(PermissionFlags.Print | PermissionFlags.HighPrint, ownerPassword, userPassword);
            WatermarkParams watermarkParams = new WatermarkParams();
            watermarkParams.Rotation = 45.3f;
            watermarkParams.Opacity = 0.15f;
            watermarkParams.TargetRange.PageSpec = PageSpec.AllPages;
            WatermarkTextParams watermarkTextParams = new WatermarkTextParams();
            Color color = new Color(0.0f / 255.0f, 0.0f / 255.0f, 0.0f / 255.0f);
            watermarkTextParams.Color = color;
            watermarkTextParams.Text = "Centre Code - Unit - 0101";
            Font f = new Font("Arial", FontCreateFlags.Embedded | FontCreateFlags.Subset);
            watermarkTextParams.Font = f;
            watermarkTextParams.FontSize = 80f;
            watermarkTextParams.TextAlign = HorizontalAlignment.Center;
            doc.Watermark(watermarkTextParams, watermarkParams);
            doc.EmbedFonts();
            doc.Save(SaveFlags.Full | SaveFlags.Linearized, sOutput);

            Process.Start(@"C:\Users\Kunal\Downloads\WatermarkedOutput.pdf");

            return sInput;
        }
    }
}
}

我收到以下异常

"System.Private.CoreLib: Exception while executing function: Function1. Datalogics.PDFL: The type initializer for 'Datalogics.PDFL.PDFLPINVOKE' threw an exception. Datalogics.PDFL: The type initializer for 'SWIGExceptionHelper' threw an exception. Datalogics.PDFL: Unable to load DLL 'DL150PDFLPINVOKE': The specified module could not be found. (Exception from HRESULT: 0x8007007E)."

相同的代码作为控制台应用程序可以正常工作。我在这里缺少什么？

Answer 1

如果修复硬编码文件名仍然没有帮助，则该错误听起来像是权限异常。

Azure Functions 在应用服务上运行，该服务有一个用于所有代码的沙箱，其中不允许某些调用。例如。 GDI32 被 PDF 生成库广泛使用。

了解更多信息Azure Web App sandbox .