azure - 如何在Azure函数中的Configure(IWebJobsBuilder builder)中获取FunctionAppDirectory

Question

在Azure函数中，我可以从上下文中获取FunctionAppDirectory，但是如何在Configure方法中获取FunctionAppDirectory。

我需要 FunctionAppDirectory 位于 <<FunctionAppDirectory>>在代码中:

// --------------------------------------------------------------------------------------------------------------------
// <copyright file="WebJobsExtensionStartup.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//  --------------------------------------------------------------------------------------------------------------------

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using Intercom.Helpers;
using Microsoft.ApplicationInsights.Extensibility;
using Microsoft.Azure.KeyVault;
using Microsoft.Azure.Services.AppAuthentication;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Configuration.AzureKeyVault;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

[assembly: WebJobsStartup(typeof(ConvAi.BfChannel.BotManagementService.WebJobsExtensionStartup), "Web Jobs Extension")]
namespace ConvAi.BfChannel.BotManagementService
{
    /// <summary>
    /// WebJobsExtensionStartup
    /// So this Azure function should be deployed with App service plan.
    /// </summary>
    public class WebJobsExtensionStartup : IWebJobsStartup
    {
        /// <summary>
        /// AzureServiceTokenProvider which is used for requesting identity token.
        /// </summary>
        public static AzureServiceTokenProvider AzureServiceTokenProvider { get; set; }

        /// <summary>
        /// Configure services.
        /// </summary>
        /// <param name="builder">WebJob Builder</param>
        public void Configure(IWebJobsBuilder builder)
        {
            try
            {
                bool isLocal = string.IsNullOrEmpty(Environment.GetEnvironmentVariable("WEBSITE_INSTANCE_ID"));

                // Gets the default configuration
                var serviceConfig = builder.Services.FirstOrDefault(s => s.ServiceType.Equals(typeof(IConfiguration)));
                var rootConfig = (IConfiguration)serviceConfig.ImplementationInstance;


                var config = new ConfigurationBuilder()
                    .SetBasePath(<<FunctionAppDirectory>>)
                    .AddConfiguration(rootConfig)
                    .AddJsonFile($@"Config\botregistrationOptions.{rootConfig["environmentName"]}.json", optional: false)
                    .Build();

                // Replace the existing config
                builder.Services.AddSingleton<IConfiguration>(config);

            }
            catch (Exception ex)
            {
                //log
                throw;
            }
        }
    }
}

Answer 1

您可以将 context.FunctionAppDirectory 替换为 Environment.CurrentDirectory。

至少，它可以在本地工作，并且正是您需要 local.settings.json 工作的地方，因此此更改应该是安全的。

当您在azure上使用它时，您需要将.AddEnvironmentVariables()添加到config。

更新:

当您在本地和 Azure 上工作时，请使用以下代码。

var config = new ConfigurationBuilder()
    .SetBasePath(<<FunctionAppDirectory>>)
    .AddConfiguration(rootConfig)
    .AddJsonFile($@"Config\botregistrationOptions.{rootConfig["environmentName"]}.json", optional: false)
    .AddEnvironmentVariables()
    .Build();