Question

我将位图图像上传到Azure Blob存储。这一切都运行良好，但后来我创建了一个新项目使用相同的代码，但现在我一直得到这个错误＆＃34;要写入的字节数大于指定的ContentLength＆＃34;

这是我的代码的一部分 memoryStream.Seek（0，SeekOrigin.Begin）;

try
{
    cloudBlobContainer.GetBlockBlobReference(resourcename).UploadFromStream(memoryStream);

    return true;
}
catch (Exception exception)
{
    ReportHelper.Report(Tag, "Error occurred while uploading image " + imageQuality, true, exception, true);

    return null;
}

问题在于UploadFromStream功能，我不知道它为什么不再工作。

此dll https://github.com/zgramana/IOSAzureBlobUploader/tree/master/lib引用了此UploadFromStream，它是根据此解决方案构建的https://github.com/zgramana/azure-sdk-for-net

这里是从dll

引用的UploadFromStream（）函数

/// <summary>
/// Uploads a stream to a block blob. 
/// </summary>
/// <param name="source">The stream providing the blob content.</param>
/// <param name="accessCondition">An <see cref="AccessCondition"/> object that represents the access conditions for the blob. If <c>null</c>, no condition is used.</param>
/// <param name="options">A <see cref="BlobRequestOptions"/> object that specifies any additional options for the request.</param>
/// <param name="operationContext">An <see cref="OperationContext"/> object that represents the context for the current operation.</param>
[DoesServiceRequest]
public void UploadFromStream(Stream source, AccessCondition accessCondition = null, BlobRequestOptions options = null, OperationContext operationContext = null)
{
    CommonUtils.AssertNotNull("source", source);
    this.attributes.AssertNoSnapshot();
    BlobRequestOptions modifiedOptions = BlobRequestOptions.ApplyDefaults(options, BlobType.BlockBlob, this.ServiceClient);
    operationContext = operationContext ?? new OperationContext();

    DateTime? expiryTime = modifiedOptions.MaximumExecutionTime.HasValue
        ? DateTime.Now + modifiedOptions.MaximumExecutionTime.Value
        : (DateTime?)null;

    if ((this.ServiceClient.ParallelOperationThreadCount == 1) &&
        source.CanSeek &&
        ((source.Length - source.Position) <= this.ServiceClient.SingleBlobUploadThresholdInBytes))
    {
        string contentMD5 = null;
        if (modifiedOptions.StoreBlobContentMD5.Value)
        {
            OperationContext tempOperationContext = new OperationContext();
            StreamDescriptor streamCopyState = new StreamDescriptor();
            long startPosition = source.Position;
            source.WriteToSync(Stream.Null, null /* maxLength */, expiryTime, true, true, tempOperationContext, streamCopyState);
            source.Position = startPosition;
            contentMD5 = streamCopyState.Md5;
        }

        Executor.ExecuteSync(
            this.PutBlobImpl(source, contentMD5, accessCondition, modifiedOptions),
            modifiedOptions.RetryPolicy,
            operationContext);
    }
    else
    {
        using (Stream blobStream = this.OpenWrite(accessCondition, modifiedOptions, operationContext))
        {
            source.WriteToSync(blobStream, null /* maxLength */, expiryTime, false, true, new OperationContext(), null /* streamCopyState */);
        }
    }
}

我一直在做几个小时的研究，试图弄清楚如何解决这个错误，但无法解决。我没有明确地设置ContentLength值（事实上我甚至无法访问它，因为我认为UploadFromStream是自己做的）

memorystream的容量是2048字节，它的长度是1415字节

这里是错误的堆栈跟踪

{Microsoft.WindowsAzure.Storage.StorageException：字节数要写入的内容大于指定的ContentLength。 ---＆GT; System.Net.ProtocolViolationException：要的字节数 write大于指定的ContentLength。在 System.Net.WebConnectionStream.CheckWriteOverflow（Int64 contentLength，Int64 totalWritten，Int64 size）[0x00000] in：0 at System.Net.WebConnectionStream.BeginWrite （System.Byte [] buffer，Int32 offset，Int32 size，System.AsyncCallback cb，System.Object state）[0x00000] in：0 at System.Net.WebConnectionStream.Write（System.Byte [] buffer，Int32 offset，Int32 size）[0x00000] in：0 at Microsoft.WindowsAzure.Storage.Core.Util.StreamExtensions.WriteToSync （System.IO.Stream流，System.IO.Stream toStream，Nullable 1 maxLength, Nullable 1 expiryTime，Boolean calculateMd5，Boolean syncRead，Microsoft.WindowsAzure.Storage.OperationContext 的OperationContext， Microsoft.WindowsAzure.Storage.Core.Util.StreamDescriptor streamCopyState）[0x00000] in：0 at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.ExecuteSync [零式] （Microsoft.WindowsAzure.Storage.Core.Executor.StorageCommandBase 1 cmd, IRetryPolicy policy, Microsoft.WindowsAzure.Storage.OperationContext operationContext) [0x00000] in <filename unknown>:0 --- End of inner exception stack trace --- at Microsoft.WindowsAzure.Storage.Core.Executor.Executor.ExecuteSync[NullType] (Microsoft.WindowsAzure.Storage.Core.Executor.StorageCommandBase 1 cmd，IRetryPolicy政策， Microsoft.WindowsAzure.Storage.OperationContext operationContext） [0x00000] in：0 at Microsoft.WindowsAzure.Storage.Blob.CloudBlockBlob.UploadFromStream （System.IO.Stream源码， Microsoft.WindowsAzure.Storage.AccessCondition accessCondition， Microsoft.WindowsAzure.Storage.Blob.BlobRequestOptions选项， Microsoft.WindowsAzure.Storage.OperationContext operationContext） [0x00000] in：0 at Client.Mobile.Droid.Source.Azure.AmsHelper + d__6.MoveNext （）[0x0021b]在c：\ testsolution \ AmsHelper.cs：103请求 InformationRequestID：RequestDate：StatusMessage：}

我检查了存储容器，确实上传了正确的流，我可以看到图像并且一切正常，但出于某种原因我得到了这个奇怪的错误。

非常感谢任何修复错误的帮助。我可以根据要求提供任何信息。

Answer 1

我仍然无法弄清楚错误发生的原因。可能是因为我使用一年前过时的分叉库来上传blob，这个库甚至不打算支持我从头开始使用的平台。

无论如何，事实证明blob上传得非常好，所以我需要做的就是抑制那个错误

try
{
    cloudBlobContainer.GetBlockBlobReference(resourcename).UploadFromStream(memoryStream);

    return true;
}
catch (Microsoft.WindowsAzure.Storage.StorageException storageException)
{
    return true;
}
catch (System.Net.ProtocolViolationException protocolViolationException)
{
    return true;
}
catch (Exception exception)
{
    ReportHelper.Report(Tag, "Error occurred while uploading image " + imageQuality, true, exception, true);

    return null;
}

奇怪的突发错误＆＃34;要写入的字节数大于指定的ContentLength＆＃34;

1 个答案: