Agfdhyk

I am trying to get a blob from azure:

$name = "myfolder/20180223_064819[1].jpg"

$blob = Get-AzureStorageBlob -Container $container.Name -Context $context -Blob $name -ErrorAction Stop 

$blob -eq $null # is True

and the file is present in storage, in the location specified above, I can see it using the azure storage explorer. However $blob is $null rather than throwing an error which is what usually happens when no file is found. I have been accessing other files fine.

If I create another file myfile/201802230648191.jpg. In this code $blob2 returns an object (which is what you'd expect)

$name = "myfolder/201802230648191.jpg"

$blob2 = Get-AzureStorageBlob -Container $container.Name -Context $context -Blob $name -ErrorAction Stop 

$blob2 -eq $null # is False

I have tried url escaping the name but then it throws a not found exception. I have looked at the naming rules here: https://docs.microsoft.com/en-us/rest/api/storageservices/Naming-and-Referencing-Containers--Blobs--and-Metadata but don't appear to be violating any.

So, my question is, why does $blob return null instead of the object?

And also, How can I get blobs with a name containing [ or ] ?

I test your code and got the same result as you. Then I checked the Get-AzureStorageBlob doc and I found it supports wildcard search even the support for Accept wildcard characters is false.

Then I further tested the code. I changed the picture name to Snipaste_2018-11-02_13-56-321.png without and still use the code, It worked. Here is the result. So the problem is because the in the $name was recognized as wildcard characters.

So if you still insist your name, you could use -Prefix instead of -Blob. Here is my result.

If you still have questions, please let me know.

I have answer this question in: https://github.com/Azure/azure-powershell/issues/7848#issuecomment-439307333

Generally agree with George, use -prefix should be work since -prefix not support wildcard search. Anyway, this will also get other blob start with the blob name, like test/new11_22[1].jpgab, to only get the matched blob, you can filter the blobs with a pipeline like:

PS C:WINDOWSsystem32>> Get-AzureStorageBlob -Container $containerName -Context $ctx -prefix test/new11_22[1].jpg | ? {$_.Name -eq "test/new11_22[1].jpg"}





   Container Uri: https://***.blob.core.windows.net/***



Name                 BlobType  Length          ContentType                    LastModified         AccessTier SnapshotTime         IsDeleted 

----                 --------  ------          -----------                    ------------         ---------- ------------         --------- 

test/new11_22[1].jpg BlockBlob 2097152         application/octet-stream       2018-11-16 07:29:19Z                                 False 

Actually the benavior of Get-AzureStorageBlob is aligned with other Powershell cmdlets like Get-Item:
like for file c:tempnew11_22[1].jpg, following is the result.

PS C:WINDOWSsystem32> get-item c:tempnew11_22[1].jpg



PS C:WINDOWSsystem32> get-item c:tempnew11_22?1?.jpg





    Directory: C:temp





Mode                LastWriteTime         Length Name                                                                                                                                                                                                                                                       

----                -------------         ------ ----                                                                                                                                                                                                                                                       

-a----       10/19/2018   7:27 PM        2097152 new11_22[1].jpg