c# - 在本地运行 Azure Functions 显示找到 1 个函数，但加载了 0 个函数，并且该函数不起作用

Question

我有一个 Azure Http 触发器函数，该函数构建成功并且运行时没有错误，但它没有加载该函数。当前运行输出以详细模式给出以下内容:

在使用 Postman 测试端点时，出于明显的原因，它给了我 404 HTTP 响应。为了解决这个问题，我尝试了与函数本身相关的多种可能性，例如:

• 项目类型不正确
• 缺少功能触发器以及与其相关的任何问题
• 无效的函数签名
• 缺少 Nuget 软件包
• local.settings.json 不正确
• host.json 不正确
• 运行配置
• 查看运行和构建时的详细日志输出以获取任何指针

最初的假设是，这是由于我正在开发的功能造成的，但进一步的调查表明，我想要在本地运行和调试的所有本地开发功能都会发生这种情况(在多个 IDE 和终端中使用新的测试功能)。这指出了一个更全局性的问题。目前使用 JetRider 运行它，但也尝试使用 Visual Studio 并直接命令行执行。

使用 azure 函数Azure Functions 核心工具:4.0.4915函数运行时版本:4.14.0.19631框架:.net 6.0语言:C#

问题:可能是什么原因造成的以及如何解决？

更新:

在调查时发现 func 没有从项目函数根读取 host.json 和 local.settings.json 。如何纠正这个问题以从项目中读取它？

Answer 1

我使用 Http 触发器获取了 .NET 6 Azure 函数，并使用命令 func host start --verbose 运行该函数，然后我在控制台/终端中收到以下日志:

PS C:\Users\Hari\Azure Functions\KrishNet6FunApp104> func host start --verbose
MSBuild version 17.4.1+9a89d02ff for .NET
  Determining projects to restore...
  All projects are up-to-date for restore.
  KrishNet6FunApp104 -> C:\Users\Hari\Azure Functions\KrishNet6FunApp104\bin\output\KrishNet6FunApp104.dll

Build succeeded.
    0 Warning(s)
    0 Error(s)

Time Elapsed 00:00:14.49



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         @@      %%%       @@
           @@    %%      @@
                %%
                %


Azure Functions Core Tools
Core Tools Version:       4.0.4915 Commit hash: N/A  (64-bit)
Function Runtime Version: 4.14.0.19631

[2023-02-14T07:11:40.662Z] Found C:\Users\Hari\Azure Functions\KrishNet6FunApp104\KrishNet6FunApp104.csproj. Using for user secrets file configuration.
[2023-02-14T07:11:42.596Z] Building host: version spec: , startup suppressed: 'False', configuration suppressed: 'False', startup operation id: '6d9cc98b-20c2-463b-822a-05cf23ae8998'
[2023-02-14T07:11:42.617Z] Reading host configuration file 'C:\Users\Hari\Azure Functions\KrishNet6FunApp104\bin\output\host.json'
[2023-02-14T07:11:42.622Z] Host configuration file read:
[2023-02-14T07:11:42.624Z] {
[2023-02-14T07:11:42.626Z]   "version": "2.0",
[2023-02-14T07:11:42.627Z]   "logging": {
[2023-02-14T07:11:42.628Z]     "applicationInsights": {
[2023-02-14T07:11:42.630Z]       "samplingSettings": {
[2023-02-14T07:11:42.631Z]         "isEnabled": true,
[2023-02-14T07:11:42.633Z]         "excludedTypes": "Request"
[2023-02-14T07:11:42.635Z]       }
[2023-02-14T07:11:42.636Z]     }
[2023-02-14T07:11:42.638Z]   }
[2023-02-14T07:11:42.639Z] }
[2023-02-14T07:11:42.671Z] Loading extensions from C:\Users\Hari\Azure Functions\KrishNet6FunApp104\bin\output\bin. BundleConfigured: False, PrecompiledFunctionApp: False, LegacyBundle: False
[2023-02-14T07:11:42.674Z] Script Startup resetting load context with base path: 'C:\Users\Hari\Azure Functions\KrishNet6FunApp104\bin\output\bin'.
[2023-02-14T07:11:42.707Z] Reading host configuration file 'C:\Users\Hari\Azure Functions\KrishNet6FunApp104\bin\output\host.json'
[2023-02-14T07:11:42.709Z] Host configuration file read:
[2023-02-14T07:11:42.711Z] {
[2023-02-14T07:11:42.714Z]   "version": "2.0",
[2023-02-14T07:11:42.716Z]   "logging": {
[2023-02-14T07:11:42.717Z]     "applicationInsights": {
[2023-02-14T07:11:42.719Z]       "samplingSettings": {
[2023-02-14T07:11:42.721Z]         "isEnabled": true,
[2023-02-14T07:11:42.723Z]         "excludedTypes": "Request"
[2023-02-14T07:11:42.724Z]       }
[2023-02-14T07:11:42.725Z]     }
[2023-02-14T07:11:42.727Z]   }
[2023-02-14T07:11:42.728Z] }
[2023-02-14T07:11:43.950Z] Initializing Warmup Extension.
[2023-02-14T07:11:44.090Z] Initializing Host. OperationId: '6d9cc98b-20c2-463b-822a-05cf23ae8998'.
[2023-02-14T07:11:44.115Z] Host initialization: ConsecutiveErrors=0, StartupCount=1, OperationId=6d9cc98b-20c2-463b-822a-05cf23ae8998
[2023-02-14T07:11:44.173Z] LoggerFilterOptions
[2023-02-14T07:11:44.174Z] {
[2023-02-14T07:11:44.176Z]   "MinLevel": "None",
[2023-02-14T07:11:44.178Z]   "Rules": [
[2023-02-14T07:11:44.180Z]     {
[2023-02-14T07:11:44.182Z]       "ProviderName": null,
[2023-02-14T07:11:44.183Z]       "CategoryName": null,
[2023-02-14T07:11:44.185Z]       "LogLevel": null,
[2023-02-14T07:11:44.187Z]       "Filter": "<AddFilter>b__0"
[2023-02-14T07:11:44.190Z]     },
[2023-02-14T07:11:44.192Z]     {
[2023-02-14T07:11:44.193Z]       "ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
[2023-02-14T07:11:44.195Z]       "CategoryName": null,
[2023-02-14T07:11:44.197Z]       "LogLevel": "None",
[2023-02-14T07:11:44.199Z]       "Filter": null
[2023-02-14T07:11:44.200Z]     },
[2023-02-14T07:11:44.202Z]     {
[2023-02-14T07:11:44.204Z]       "ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
[2023-02-14T07:11:44.206Z]       "CategoryName": null,
[2023-02-14T07:11:44.208Z]       "LogLevel": null,
[2023-02-14T07:11:44.210Z]       "Filter": "<AddFilter>b__0"
[2023-02-14T07:11:44.212Z]     },
[2023-02-14T07:11:44.214Z]     {
[2023-02-14T07:11:44.216Z]       "ProviderName": "Azure.Functions.Cli.Diagnostics.ColoredConsoleLoggerProvider",
[2023-02-14T07:11:44.218Z]       "CategoryName": null,
[2023-02-14T07:11:44.220Z]       "LogLevel": null,
[2023-02-14T07:11:44.222Z]       "Filter": "<AddFilter>b__0"
[2023-02-14T07:11:44.224Z]     }
[2023-02-14T07:11:44.226Z]   ]
[2023-02-14T07:11:44.231Z] }
[2023-02-14T07:11:44.234Z] LoggerFilterOptions
[2023-02-14T07:11:44.236Z] {
[2023-02-14T07:11:44.238Z]   "MinLevel": "None",
[2023-02-14T07:11:44.241Z]   "Rules": [
[2023-02-14T07:11:44.243Z]     {
[2023-02-14T07:11:44.245Z]       "ProviderName": null,
[2023-02-14T07:11:44.249Z]       "CategoryName": null,
[2023-02-14T07:11:44.251Z]       "LogLevel": null,
[2023-02-14T07:11:44.253Z]       "Filter": "<AddFilter>b__0"
[2023-02-14T07:11:44.255Z]     },
[2023-02-14T07:11:44.260Z]     {
[2023-02-14T07:11:44.266Z]       "ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
[2023-02-14T07:11:44.268Z]       "CategoryName": null,
[2023-02-14T07:11:44.271Z]       "LogLevel": "None",
[2023-02-14T07:11:44.274Z]       "Filter": null
[2023-02-14T07:11:44.276Z]     },
[2023-02-14T07:11:44.278Z]     {
[2023-02-14T07:11:44.281Z]       "ProviderName": "Microsoft.Azure.WebJobs.Script.WebHost.Diagnostics.SystemLoggerProvider",
[2023-02-14T07:11:44.283Z]       "CategoryName": null,
[2023-02-14T07:11:44.286Z]       "LogLevel": null,
[2023-02-14T07:11:44.288Z]       "Filter": "<AddFilter>b__0"
[2023-02-14T07:11:44.291Z]     },
[2023-02-14T07:11:44.294Z]     {
[2023-02-14T07:11:44.297Z]       "ProviderName": "Azure.Functions.Cli.Diagnostics.ColoredConsoleLoggerProvider",
[2023-02-14T07:11:44.300Z]       "CategoryName": null,
[2023-02-14T07:11:44.303Z]       "LogLevel": null,
[2023-02-14T07:11:44.305Z]       "Filter": "<AddFilter>b__0"
[2023-02-14T07:11:44.310Z]     }
[2023-02-14T07:11:44.313Z]   ]
[2023-02-14T07:11:44.315Z] }
[2023-02-14T07:11:44.317Z] ConcurrencyOptions
[2023-02-14T07:11:44.320Z] {
[2023-02-14T07:11:44.322Z]   "DynamicConcurrencyEnabled": false,
[2023-02-14T07:11:44.326Z]   "MaximumFunctionConcurrency": 500,
[2023-02-14T07:11:44.332Z]   "CPUThreshold": 0.8,
[2023-02-14T07:11:44.335Z]   "SnapshotPersistenceEnabled": true
[2023-02-14T07:11:44.337Z] }
[2023-02-14T07:11:44.339Z] FunctionResultAggregatorOptions
[2023-02-14T07:11:44.343Z] {
[2023-02-14T07:11:44.346Z]   "BatchSize": 1000,
[2023-02-14T07:11:44.350Z]   "FlushTimeout": "00:00:30",
[2023-02-14T07:11:44.353Z]   "IsEnabled": true
[2023-02-14T07:11:44.357Z] }
[2023-02-14T07:11:44.361Z] SingletonOptions
[2023-02-14T07:11:44.366Z] {
[2023-02-14T07:11:44.372Z]   "LockPeriod": "00:00:15",
[2023-02-14T07:11:44.376Z]   "ListenerLockPeriod": "00:00:15",
[2023-02-14T07:11:44.379Z]   "LockAcquisitionTimeout": "10675199.02:48:05.4775807",
[2023-02-14T07:11:44.383Z]   "LockAcquisitionPollingInterval": "00:00:05",
[2023-02-14T07:11:44.385Z]   "ListenerLockRecoveryPollingInterval": "00:01:00"
[2023-02-14T07:11:44.387Z] }
[2023-02-14T07:11:44.393Z] Starting JobHost
[2023-02-14T07:11:44.405Z] Starting Host (HostId=c1ml47687ms-778510111, InstanceId=454fc6f1-0750-4023-b206-73112827b0d6, Version=4.14.0.19631, ProcessId=5892, AppDomainId=1, InDebugMode=False, InDiagnosticMode=False, FunctionsExtensionVersion=(null))
[2023-02-14T07:11:44.483Z] Loading functions metadata
[2023-02-14T07:11:44.491Z] Reading functions metadata
[2023-02-14T07:11:44.497Z] Reading functions metadata
[2023-02-14T07:11:44.524Z] 1 functions found
[2023-02-14T07:11:44.531Z] 1 functions found
[2023-02-14T07:11:44.566Z] Reading functions metadata
[2023-02-14T07:11:44.622Z] 1 functions found
[2023-02-14T07:11:44.626Z] 1 functions loaded
[2023-02-14T07:11:45.667Z] Generating 1 job function(s)
[2023-02-14T07:11:45.771Z] Found the following functions:
[2023-02-14T07:11:45.773Z] KrishNet6FunApp104.Function1.Run
[2023-02-14T07:11:45.775Z]
[2023-02-14T07:11:45.805Z] HttpOptions
[2023-02-14T07:11:45.807Z] {
[2023-02-14T07:11:45.809Z]   "DynamicThrottlesEnabled": false,
[2023-02-14T07:11:45.810Z] Initializing function HTTP routes
[2023-02-14T07:11:45.812Z]   "EnableChunkedRequestBinding": false,
[2023-02-14T07:11:45.814Z] Mapped function route 'api/Function1' [get,post] to 'Function1'
[2023-02-14T07:11:45.816Z]   "MaxConcurrentRequests": -1,
[2023-02-14T07:11:45.818Z]
[2023-02-14T07:11:45.820Z]   "MaxOutstandingRequests": -1,
[2023-02-14T07:11:45.825Z]   "RoutePrefix": "api"
[2023-02-14T07:11:45.830Z] }
[2023-02-14T07:11:45.855Z] Host initialized (1410ms)
[2023-02-14T07:11:45.865Z] Host started (1453ms)
[2023-02-14T07:11:45.868Z] Job host started

Functions:

        Function1: [GET,POST] http://localhost:7071/api/Function1

我观察到，在生成和验证项目中找到的函数数量之前，运行时工作线程正在读取函数元数据:

在同一项目中创建第二个 Http 触发函数后:

[2023-02-14T08:45:23.800Z] Starting JobHost
[2023-02-14T08:45:23.804Z] Starting Host (HostId=c1ml47687ms-778510111, InstanceId=08cbea94-a74d-4167-892f-9802ed417b9a, Version=4.14.0.19631, ProcessId=18812, AppDomainId=1, InDebugMode=False, InDiagnosticMode=False, FunctionsExtensionVersion=(null))
[2023-02-14T08:45:23.829Z] Loading functions metadata
[2023-02-14T08:45:23.834Z] Reading functions metadata
[2023-02-14T08:45:23.837Z] Reading functions metadata
[2023-02-14T08:45:23.849Z] 2 functions found
[2023-02-14T08:45:23.854Z] 2 functions found
[2023-02-14T08:45:23.867Z] Reading functions metadata
[2023-02-14T08:45:23.882Z] 1 functions found
[2023-02-14T08:45:23.886Z] 2 functions loaded
[2023-02-14T08:45:24.100Z] Generating 2 job function(s)
[2023-02-14T08:45:24.145Z] Found the following functions:
[2023-02-14T08:45:24.147Z] KrishNet6FunApp104.Function1.Run
[2023-02-14T08:45:24.149Z] Company.Function.Function2.Run
[2023-02-14T08:45:24.150Z]
[2023-02-14T08:45:24.161Z] HttpOptions
[2023-02-14T08:45:24.163Z] Initializing function HTTP routes
[2023-02-14T08:45:24.163Z] {
[2023-02-14T08:45:24.165Z] Mapped function route 'api/Function1' [get,post] to 'Function1'
[2023-02-14T08:45:24.168Z]   "DynamicThrottlesEnabled": false,
[2023-02-14T08:45:24.169Z] Mapped function route 'api/Function2' [get,post] to 'Function2'
[2023-02-14T08:45:24.170Z]   "EnableChunkedRequestBinding": false,
[2023-02-14T08:45:24.171Z]
[2023-02-14T08:45:24.172Z]   "MaxConcurrentRequests": -1,
[2023-02-14T08:45:24.174Z]   "MaxOutstandingRequests": -1,
[2023-02-14T08:45:24.175Z]   "RoutePrefix": "api"
[2023-02-14T08:45:24.176Z] }
[2023-02-14T08:45:24.185Z] Host initialized (365ms)
[2023-02-14T08:45:24.192Z] Host started (384ms)
[2023-02-14T08:45:24.194Z] Job host started

Functions:

        Function1: [GET,POST] http://localhost:7071/api/Function1
        Function2: [GET,POST] http://localhost:7071/api/Function2

此函数元数据特定于触发器类型，例如 Http、队列、Blob 存储等。

对于 Http 触发器，它期望名称、类型和方向应正确映射到本 MS 文档中提到的绑定(bind)元数据1 & 2

所有这些绑定(bind)将在 Http 触发器类文件的函数声明中提供 - 本地创建的 cSharp Azure 函数。

这是 GitHub Repository ，我已经推送了我的Azure Functions (.NET 6 Stack) - Http Trigger项目代码供大家引用。