Try seek blob stream position to begin

[JadynWong]

Use the file system or azure blob the blob provider, the Position of the returned stream is at the end.

[maliming]

We should change blob provider instead of CmsKit.

[cotur]

Hi @JadynWong,

as @maliming said, we need to upgrade the Blob Providers instead of updating it at the Cms-Kit module.

[codecov]

Codecov Report

Merging #10445 (8fbb765) into dev (08f2482) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 8fbb765 differs from pull request most recent head c8e6316. Consider uploading reports for the commit c8e6316 to get more accurate results

@@           Coverage Diff           @@
##              dev   #10445   +/-   ##
=======================================
  Coverage   54.73%   54.73%           
=======================================
  Files        2641     2641           
  Lines       75354    75361    +7     
=======================================
+ Hits        41243    41250    +7     
  Misses      34111    34111           

Impacted Files	Coverage Δ
....BlobStoring/Volo/Abp/BlobStoring/BlobContainer.cs	97.84% <100.00%> (+0.11%)	⬆️

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[maliming]

We need to change the Stream for all BlobProviders.

https://github.com/abpframework/abp/blob/dev/framework/src/Volo.Abp.BlobStoring.FileSystem/Volo/Abp/BlobStoring/FileSystem/FileSystemBlobProvider.cs#L79
https://github.com/abpframework/abp/blob/dev/framework/src/Volo.Abp.BlobStoring.Azure/Volo/Abp/BlobStoring/Azure/AzureBlobProvider.cs#L72
https://github.com/abpframework/abp/blob/dev/modules/blob-storing-database/src/Volo.Abp.BlobStoring.Database.Domain/Volo/Abp/BlobStoring/Database/DatabaseBlobProvider.cs#L122

[JadynWong]

Hi @maliming

I have some questions.
Now I try to handle it in BlobContainer's GetOrNullAsync. Users usually use the IBlobContainer to manipulate the blob, and the BlobProvider only as an implementation.
Do we need to move the TrySeekStreamToBegin method to the BlobProviderBase, and handle it in each Provider?

[maliming]

We are using MemoryStream, we can change it directly.

No need for the TrySeekStreamToBegin method

[JadynWong]

DatabaseBlobProvider using byte[] does not require it, it is default at start position