当我使用Google.Protobuf

时间:2018-03-16 04:05:48

标签: c# function firebase .net-assembly azure-functions

我是Azure功能的新手,我正在创建FirestoreDb连接。但是当我调用FirestoreDb.Create方法时,我采用了这个例外:

  

执行函数时出现异常:OutputFirebase。 Output.Firebase.Services.Functions:无法加载文件或程序集' Google.Protobuf,Version = 3.5.1.0,Culture = neutral,PublicKeyToken = a7d26565bac4d604'。无法找到或加载特定文件。 (来自HRESULT的异常:0x80131621)。 System.Private.CoreLib:无法加载文件或程序集' Google.Protobuf,Version = 3.5.1.0,Culture = neutral,PublicKeyToken = a7d26565bac4d604'。

AppDomain.CurrentDomain.GetAssemblies()我看到version 3.0.0

Google.Protobuf 3.0.0版图片:

Google.Protobuf version 3.0.0 image

但我已将version 3.5.1安装到*.csproj

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <AzureFunctionsVersion>v2</AzureFunctionsVersion>
    <AssemblyName>Output.Firebase.Services.Functions</AssemblyName>
    <RootNamespace>Output.Firebase.Services.Functions</RootNamespace>
    <RestoreProjectStyle>PackageReference</RestoreProjectStyle>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Google.Cloud.Firestore" Version="1.0.0-beta02" />
    <PackageReference Include="Google.Protobuf" Version="3.5.1" />
    <PackageReference Include="Microsoft.NET.Sdk.Functions" Version="1.0.9" />
  </ItemGroup>
  <ItemGroup>
    <None Update="firestore-key.json">
      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
    </None>
    <None Update="host.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    <None Update="local.settings.json">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
      <CopyToPublishDirectory>Never</CopyToPublishDirectory>
    </None>
  </ItemGroup>
</Project>

C#代码示例

using System;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using Google.Cloud.Firestore;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.Azure.WebJobs.Host;

namespace Output.Firebase.Services.Functions
{
    public static class OutputFirebaseFunction
    {
        private static FirestoreDb FirestoreDb;

        [FunctionName("OutputFirebase")]
        public static async Task<HttpResponseMessage> Run([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = "output/firebase")]HttpRequestMessage req, TraceWriter log, ExecutionContext executionContext)
        {
            log.Info("C# HTTP trigger function processed a request.");

            await InitializeDatabaseAsync(Directory.GetParent(executionContext.FunctionDirectory).FullName);
            return req.CreateResponse(HttpStatusCode.OK);
        }

        private static async Task InitializeDatabaseAsync(string path1)
        {
            try
            {
                var test = Google.Protobuf.FieldCodec.ForBool(13);
            }
            catch (Exception ex)
            {
                throw;
            }
        }
    }
}

有关为何发生这种情况或如何解决问题的任何帮助?

Visual Studio 2017 - 版本15.6.2

1 个答案:

答案 0 :(得分:3)

Azure函数主机使用Protobuf 3.3.0 is used与out-of-proc函数进行通信(例如,用java编写)。

因此,如果您控制引用,我建议将protobuf版本切换为与运行时版本相同。

如果无法控制版本,实际上可能会被阻止,因为没有绑定重定向支持,尤其是对于v2 / .NET Standard。请务必在github issue中提及您的方案。