[azure-storage-blob] requires_sync issue in start_copy_from_url

[Juliehzl]

• Package Name: azure-storage-blob
• Package Version: 12.4.0b1
• Operating System: Win 10
• Python Version: 3.7.7

Describe the bug
A clear and concise description of what the bug is.

Request will be failed with additional property requires_sync when kwargs['requires_sync']=None

azure-sdk-for-python/sdk/storage/azure-storage-blob/azure/storage/blob/_blob_client.py

Lines 1536 to 1537 in 87a6e32

	if kwargs.get('requires_sync'):
	headers['x-ms-requires-sync'] = str(kwargs.pop('requires_sync'))

Recommended silution:

        if 'requires_sync' in kwargs:
            requires_sync = kwargs.pop('requires_sync')
            if requires_sync:
                headers['x-ms-requires-sync'] = str(requires_sync)

To Reproduce
Steps to reproduce the behavior:
1.

Expected behavior
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Additional context
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Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @xgithubtriage.

[xiafu-msft]

Hi @Juliehzl
Can you explain a bit what is kwargs['requires_sync']=None? I didn't get the problem

[tasherif-msft]

Hi @Juliehzl, any updates on this issue? could you further explain the problem?
otherwise we can close this issue if it has been resolved.