将Microsoft.Azure.WebJobs.Extensions.SignalRService包添加到Azure Function项目会破坏我的依赖注入

问题描述

我目前正在Web应用程序上工作，该应用程序具有一个与Azure Cosmos数据库对话的Azure Function API后端。如本文所述，我已经在我的项目中添加了依赖注入：https://docs.microsoft.com/en-us/azure/azure-functions/functions-dotnet-dependency-injection

我的Startup类如下：

using Microsoft.Azure.Functions.Extensions.DependencyInjection;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using PoolscoreTrackerV2.API.Config;
using PoolscoreTrackerV2.Functions.Services;
using System;

[assembly: Functionsstartup(typeof(PoolscoreTrackerV2.Functions.Startup))]

namespace PoolscoreTrackerV2.Functions
{
    public class Startup : Functionsstartup
    {
        public override void Configure(IFunctionsHostBuilder builder)
        {
            builder.Services.AddLogging(loggingBuilder =>
            {
                loggingBuilder.AddFilter(level => true);
            });

            builder.Services.AddOptions<CosmosDbOptions>()
                .Configure<IConfiguration>((settings,configuration) =>
                {
                    configuration.GetSection("CosmosDb").Bind(settings);
                });

            builder.Services.AddSingleton<ICosmosDbService>(
                new CosmosDbService(
                    new CosmosClient(
                        Environment.GetEnvironmentvariable("CosmosDb:CosmosDbConnection")
                        )
                    )
                );
        }
    }
}

这是我在函数中如何使用它的示例：

namespace PoolscoreTrackerV2.API.Functions.Matches
{
    public class GetMatches
    {
        private readonly ICosmosDbService _cosmosDbService;
        private readonly ILogger<GetMatches> _logger;
        private readonly CosmosDbOptions _settings;

        public GetMatches(ICosmosDbService cosmosDbService,ILogger<GetMatches> logger,IOptions<CosmosDbOptions> settings)
        {
            _cosmosDbService = cosmosDbService;
            _logger = logger;
            _settings = settings.Value;
            _cosmosDbService.InitializeCollection(_settings.DatabaseId,_settings.ContainerId);
        }

        [FunctionName("GetMatches")]
        public async Task<IActionResult> Run(
            [HttpTrigger(AuthorizationLevel.Anonymous,"get",Route = "matches")] HttpRequest req,ClaimsPrincipal principal)
        {
            if (ValidationExtensions.AuthorizeUser(principal) == false)
            {
                return new UnauthorizedResult();
            }

            var data = await _cosmosDbService.GetAsync<Match>("SELECT * FROM m where m.type = 'match'");

            _logger.Loginformation("GET Matches");

            return new OkObjectResult(data);
        }
    }
}

一切正常，直到我需要为需要实时数据的特定页面添加SignalR为止。刚安装SignalR包Microsoft.Azure.WebJobs.Extensions.Signalrservice后，我在控制台中注意到此错误：

[2020-10-14T07:05:00.381] Unsupported service transport type: . Use default Transient instead.

当我尝试访问API端点时，在所有端点上出现500错误，并且在控制台中出现以下错误：

Executed 'GetMatches' (Failed,Id=3a10737c-7abe-4e18-aeb6-1d442b36ef7a,Duration=43ms)
[2020-10-14T07:05:08.289] Microsoft.Extensions.DependencyInjection.Abstractions: Unable to resolve service for type 'PoolscoreTrackerV2.Functions.Services.ICosmosDbService' while attempting to activate 'PoolscoreTrackerV2.API.Functions.Matches.GetMatches'.

我已将所有软件包更新到最新版本，并尝试重新安装所有软件包，但仍然出现相同的错误。当我删除SignalR软件包时，所有错误都会消失。我已经对此进行了多次测试。

解决方法

将版本更改为1.0.2消除了依赖注入错误。我仍然收到不支持的服务传输类型警告，但现在可以无例外地查询数据。