在C＃/ Mono中，无法与Google云存储通信

Question

我现在正在开发一个可通过Mono在Linux实例上运行的C＃应用​​程序。 处理完图像后，需要将图像存储在Google Cloud Storage中。

我具有身份验证凭据设置，并且.NET客户端库能够设置StorageService对象（即，找到JSON文件并验证所有内容）。 当我尝试上传时，没有任何反应。 因此，在我的SetupConnection()函数中，我尝试查询项目中的单个存储桶。 我收到此错误：

Unhandled Exception:
System.Net.WebException: Error writing request: The authentication or decryption has failed.
  at System.Net.WebConnectionStream.WriteHeaders () [0x00000] in <filename unknown>:0 
  at System.Net.WebConnectionStream.SetHeaders (System.Byte[] buffer) [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.Net.WebConnectionStream:SetHeaders (byte[])
  at System.Net.HttpWebRequest.SendRequestHeaders (Boolean propagate_error) [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Http.ConfigurableMessageHandler+<SendAsync>d__43.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at System.Net.Http.HttpClient+<SendAsyncWorker>c__async0.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.Requests.TokenRequestExtenstions+<ExecuteAsync>d__0.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[Google.Apis.Auth.OAuth2.Responses.TokenResponse].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.ServiceAccountCredential+<RequestAccessTokenAsync>d__19.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Boolean].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.ServiceCredential+<GetAccessTokenForRequestAsync>d__23.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.String].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.ServiceAccountCredential+<GetAccessTokenForRequestAsync>d__20.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.String].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.ServiceCredential+<InterceptAsync>d__21.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Http.ConfigurableMessageHandler+<SendAsync>d__43.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at System.Net.Http.HttpClient+<SendAsyncWorker>c__async0.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Requests.ClientServiceRequest`1+<ExecuteUnparsedAsync>d__26[Google.Apis.Storage.v1.Data.Buckets].MoveNext () [0x00000] in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.Net.WebException: Error writing request: The authentication or decryption has failed.
  at System.Net.WebConnectionStream.WriteHeaders () [0x00000] in <filename unknown>:0 
  at System.Net.WebConnectionStream.SetHeaders (System.Byte[] buffer) [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.Net.WebConnectionStream:SetHeaders (byte[])
  at System.Net.HttpWebRequest.SendRequestHeaders (Boolean propagate_error) [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Http.ConfigurableMessageHandler+<SendAsync>d__43.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at System.Net.Http.HttpClient+<SendAsyncWorker>c__async0.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.Requests.TokenRequestExtenstions+<ExecuteAsync>d__0.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[Google.Apis.Auth.OAuth2.Responses.TokenResponse].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.ServiceAccountCredential+<RequestAccessTokenAsync>d__19.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Boolean].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.ServiceCredential+<GetAccessTokenForRequestAsync>d__23.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.String].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.ServiceAccountCredential+<GetAccessTokenForRequestAsync>d__20.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.String].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Auth.OAuth2.ServiceCredential+<InterceptAsync>d__21.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable+ConfiguredTaskAwaiter.GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Http.ConfigurableMessageHandler+<SendAsync>d__43.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at System.Net.Http.HttpClient+<SendAsyncWorker>c__async0.MoveNext () [0x00000] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <filename unknown>:0 
  at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[System.Net.Http.HttpResponseMessage].GetResult () [0x00000] in <filename unknown>:0 
  at Google.Apis.Requests.ClientServiceRequest`1+<ExecuteUnparsedAsync>d__26[Google.Apis.Storage.v1.Data.Buckets].MoveNext () [0x00000] in <filename unknown>:0 

这是我的设置代码：

public static void SetupGCSConnection()
{
    var credentials = Google.Apis.Auth.OAuth2.GoogleCredential.GetApplicationDefaultAsync().Result;

    if (credentials.IsCreateScopedRequired)
        credentials = credentials.CreateScoped(new[] { StorageService.Scope.DevstorageFullControl });

    var serviceInitializer = new BaseClientService.Initializer()
    {
        ApplicationName = "MyApp",
        HttpClientInitializer = credentials
    };

    storage = new StorageService(serviceInitializer);

    // Error is thrown here
    var buckets = storage.Buckets.List(Config.GoogleProjectID).Execute();
    foreach (var b in buckets.Items) {
        Console.WriteLine(b.ToString());
    }
}

我以前可以让C＃与GCS进行对话，但是那是我在Windows环境中使用Microsoft的.NET vm进行工作的时候。 我之前做了一些研究，Mono处理CA的方式与Microsoft VM处理的方式可能存在一些问题。

Answer 1

您的问题通常来自未更新的根证书。

请按照此处的说明更新您的根证书。

如果这样做没有帮助，则可以将委托设置为

ServicePointManager.ServerCertificateValidationCallback

并接受所有证书。 如果可行，那么您知道问题出在证书验证上，您可以尝试其他解决方案。 （我绝不建议使用回调函数来接受生产环境中的所有证书，仅使用它来调试问题）。

Answer 2

我解决了这个问题。

我使用的是Ubuntu随附的默认Mono版本，但该版本已过时。 我在这里改用了官方的Mono库： http : //www.mono-project.com/docs/getting-started/install/linux/

然后也安装了ca-certificates-mono软件包。 （此处有更多详细信息： http : //www.mono-project.com/docs/faq/security/ ）

感谢Lex Li的帮助。