cannot access to URI SAS blob storage AuthenticationFailed

Question

hi,

im trying to access to a specific blob by URI SAS but i got error AuthenticationErrorDetail, is there anything im doing wrong here?

Thank you for your help!

url = f"https://{account_name}.blob.core.windows.net/{container_name}/{blob_name}"

sas_token = generate_blob_sas(
account_name=account_name,
container_name=container_name,
blob_name=blob_name,
account_key=account_key,
permission=AccountSasPermissions(read=True),
expiry=datetime.utcnow() + timedelta(hours=6)
)

url_with_sas = f"{url}?{sas_token}"

<Error>
<Code>AuthenticationFailed</Code>
<Message>Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature. RequestId:bcf014e5-401e-0181-6499-b8d2d4000000 Time:2022-08-25T15:42:09.0324529Z</Message>
<AuthenticationErrorDetail>Signature did not match. String to sign used was r 2022-08-25T21:41:59Z /blob/devstoreaccount1/basiccompanieshouse/node/node_basic_company_data_20220605.csv 2020-06-12 b </AuthenticationErrorDetail>
</Error>

Answer 1

@M Do Welcome to Microsoft Q&A Forum, Thank you for posting your query here!

It looks like you are trying to load a container via the URL in your browser. Unfortunately this is not supported by default. If you try loading a specific blob then it should work as you are intending. If you want to list all blobs in the container you need to use the List Blobs format.

SAS Token has been generated for complete container ``

If you generate a SAS token inside the contain for specify file it will work .

For more information on SAS token, please refer to the Best practices

Please let us know if you have any further queries. I’m happy to assist you further.

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