[BUG] SAS tokens that start with '?' cause requests to storage to fail

Describe the bug If SAS token begins with ‘?’ (like when copied from Azure Portal), it fails with the below error:

com.azure.storage.blob.models.BlobStorageException: 
Status code 403, 
<?xml version="1.0" encoding="utf-8"?>
  <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: redacted Time: redacted</Message> . 
      <AuthenticationErrorDetail>sr is mandatory. Cannot be empty</AuthenticationErrorDetail>
  </Error>

Exception or Stack Trace Added above

To Reproduce Add an existing storage account name in the endpoint below and should be able to reproduce the issue:

String endpoint = "https://<storage_account>.blob.core.windows.net/";
BlobServiceClient client = new BlobServiceClientBuilder()
    .endpoint(endpoint)
    .sasToken("?sv=2019-02-02&ss=bf&srt=sco&sp=rla&se=2019-11-27T16:03:21Z&st=2019-11-27T08:03:21Z&spr=https&sig=NZX%2FZH7GFSPgmb7j62GldqDEW%2BINoFKlAC4euoxM1Xc%3D")
    .buildClient();

BlobServiceProperties properties = client.getProperties();

Code Snippet Added above

Expected behavior SDK should be able to handle both scenarios - a SAS token that begins with ‘?’ and one that does not.

Screenshots NA

Setup (please complete the following information):

• OS: Linux
• IDE : IntelliJ
• Version of the Library used: 12.0.0

Additional context NA

Information Checklist Kindly make sure that you have added all the following information above and checkoff the required fields otherwise we will treat the issuer as an incomplete report

• Bug Description Added
• Repro Steps Added
• Setup information Added

[gapra-msft]

Hi @SukruthKS, you’re right. I wasn’t testing with 12.0.0 so that’s probably why I wasn’t seeing the issue.

As you pointed out a fix for the issue you mentioned was committed so it will be in our next release.

I’ll go ahead and close this issue since you should be resolved by our next release.

[gapra-msft]

Hi @SukruthKS,

It seems like you are encountering the issue reported here https://github.com/Azure/azure-sdk-for-java/issues/6542.

We are aware of the problem and are currently working on a fix for it.

I will prioritize working on getting this fix out as soon as possible and will keep you posted on the status.