Xamarin Azure Blob 存储未返回/授权答案

【问题标题】：Xamarin Azure Blob Storage Not Returning/AuthorizingXamarin Azure Blob 存储未返回/授权
【发布时间】：2017-01-09 06:45:43
【问题描述】：

我已经尝试了所有我能找到的 Xamarin Storage sn-ps，但 Azure 从不返回任何内容或存储任何内容。它通常甚至不抛出任何异常，只是忽略了它看起来的大部分代码。

我有这些：

 public async Task<string> TestStorage()
 {
    CloudBlobContainer container = new CloudBlobContainer(new Uri(Settings.StorageContainerUrl), new StorageCredentials(Settings.StorageAccountName, Settings.StorageAccountKey));
    //CloudBlockBlob blob = container.GetBlockBlobReference("mytest2");
    //await blob.UploadTextAsync("This is newly uploaded data");
    CloudBlockBlob blob = container.GetBlockBlobReference("mytest");
    string data = await blob.DownloadTextAsync();
    return data;
}

如果我给它一个不正确的 StorageContainerUrl 或 StorageAccountName，那么 Azure 会抛出一个错误。到目前为止一切顺利，它必须连接和验证该信息。我还确认，如果我使用不存在的 Blob 名称，Azure Storage 会抛出 StorageException: The specified blob does not exist。

但是，如果我给它一个错误的 StorageAccountKey，则不会引发异常。

此外，DownloadTextAsync 命令不会为现有的 blob 返回任何内容——事实上它永远不会返回，并且永远不会设置字符串数据。最终抛出异常：

[0:] Microsoft.WindowsAzure.Storage.StorageException: The method or operation is not implemented. ---> System.NotImplementedException: The method or operation is not implemented.
  at System.Security.Cryptography.IncrementalHash.CreateHash (System.Security.Cryptography.HashAlgorithmName hashAlgorithm) [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/System.Core/System.Security.Cryptography/IncrementalHash.cs:39 
  at Microsoft.WindowsAzure.Storage.Core.Util.MD5Wrapper..ctor () [0x0001c] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\Common\Core\Util\MD5Wrapper.cs:63 
  at Microsoft.WindowsAzure.Storage.Core.Util.StreamExtensions+<WriteToAsync>d__1`1[T].MoveNext () [0x00112] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\Common\Core\Util\StreamExtensions.cs:269 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113 
  at Microsoft.WindowsAzure.Storage.Core.Executor.Executor+<ExecuteAsyncInternal>d__4`1[T].MoveNext () [0x009c6] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\WindowsRuntime\Core\Executor\Executor.cs:215 
   --- End of inner exception stack trace ---
  at Microsoft.WindowsAzure.Storage.Core.Executor.Executor+<ExecuteAsyncInternal>d__4`1[T].MoveNext () [0x01034] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\WindowsRuntime\Core\Executor\Executor.cs:311 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113 
  at Microsoft.WindowsAzure.Storage.Blob.CloudBlob+<>c__DisplayClass68_0+<<DownloadRangeToStreamAsync>b__0>d.MoveNext () [0x00095] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\WindowsRuntime\Blob\CloudBlob.cs:343 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113 
  at Microsoft.WindowsAzure.Storage.Blob.CloudBlockBlob+<>c__DisplayClass41_0+<<DownloadTextAsync>b__0>d.MoveNext () [0x00061] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\WindowsRuntime\Blob\CloudBlockBlob.cs:594 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 
  at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357 
  at QwikQuestion.Services.StorageDataService+<TestStorage>d__17.MoveNext () [0x00095] in C:\Users\alex\documents\visual studio 2015\Projects\QwikQuestion\QwikQuestion\QwikQuestion\Services\StorageDataService.cs:56 
Request Information
RequestID:39730ffc-0001-00ed-45ed-69f892000000
RequestDate:Sun, 08 Jan 2017 20:27:34 GMT
StatusMessage:PartialContent
[0:] Microsoft.WindowsAzure.Storage.StorageException: The method or operation is not implemented. ---> System.NotImplementedException: The method or operation is not implemented.
  at System.Security.Cryptography.IncrementalHash.CreateHash (System.Security.Cryptography.HashAlgorithmName hashAlgorithm) [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/System.Core/System.Security.Cryptography/IncrementalHash.cs:39 
  at Microsoft.WindowsAzure.Storage.Core.Util.MD5Wrapper..ctor () [0x0001c] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\Common\Core\Util\MD5Wrapper.cs:63 
  at Microsoft.WindowsAzure.Storage.Core.Util.StreamExtensions+<WriteToAsync>d__1`1[T].MoveNext () [0x00112] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\Common\Core\Util\StreamExtensions.cs:269 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113 
  at Microsoft.WindowsAzure.Storage.Core.Executor.Executor+<ExecuteAsyncInternal>d__4`1[T].MoveNext () [0x009c6] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\WindowsRuntime\Core\Executor\Executor.cs:215 
   --- End of inner exception stack trace ---
  at Microsoft.WindowsAzure.Storage.Core.Executor.Executor+<ExecuteAsyncInternal>d__4`1[T].MoveNext () [0x01034] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\WindowsRuntime\Core\Executor\Executor.cs:311 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113 
  at Microsoft.WindowsAzure.Storage.Blob.CloudBlob+<>c__DisplayClass68_0+<<DownloadRangeToStreamAsync>b__0>d.MoveNext () [0x00095] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\WindowsRuntime\Blob\CloudBlob.cs:343 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:113 
  at Microsoft.WindowsAzure.Storage.Blob.CloudBlockBlob+<>c__DisplayClass41_0+<<DownloadTextAsync>b__0>d.MoveNext () [0x00061] in C:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\WindowsRuntime\Blob\CloudBlockBlob.cs:594 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 
  at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357 
  at QwikQuestion.Services.StorageDataService+<TestStorage>d__17.MoveNext () [0x00095] in C:\Users\alex\documents\visual studio 2015\Projects\QwikQuestion\QwikQuestion\QwikQuestion\Services\StorageDataService.cs:56 
--- End of stack trace from previous location where exception was thrown ---
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 
  at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/3511/501e63ce/source/mono/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357 
  at QwikQuestion.ViewModels.ViewQuestionViewModel+<FetchQuestionTask>d__15.MoveNext () [0x00180] in C:\Users\alex\documents\visual studio 2015\Projects\QwikQuestion\QwikQuestion\QwikQuestion\ViewModels\ViewQuestionViewModel.cs:55 
Request Information
RequestID:39730ffc-0001-00ed-45ed-69f892000000
RequestDate:Sun, 08 Jan 2017 20:27:34 GMT
StatusMessage:PartialContent

如果我取消注释 UploadTextAsync，那么它也不会执行任何操作，并且不会在 Azure 上创建任何 Blob。

我可能犯了一些简单的错误，但我已经尝试了所有我发现的组合，包括 CloudStorageAccount.Parse、CreateCloudBlobClient。我认为我在正确的轨道上，因为如果我给它一个错误的 URL 或帐户，我会从 Azure 获得异常。

【问题讨论】：

我猜上面代码的编写方法也是异步的。你也在等（等待）吗？
确定你没有吞下异常吗？
@guarav-mantri 我添加了函数签名。是的，它是异步的。
@François 好的，我将它包装在 try/catch 中，一段时间后我确实遇到了异常。异常是状态码为 206 (PartialContent) 的 StorageException NotImplemented。我将使用异常输出更新问题。
@GauravMantri 此外，如果 blob 不存在，Azure 会引发异常，但如果存在，则会在长时间超时后引发 NotImplemented。

标签： azure xamarin azure-storage

【解决方案1】：

似乎异常是由于尚未在 Xamarin 中实现的散列函数造成的。更多详情请参见问题：https://github.com/Azure/azure-storage-net/issues/387

解决方案是在修复之前恢复到 Azure Storage 7.2.1。

【讨论】：