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Configure Azure SAS Authentication for REST

Demonstrates Rest.SetAuthAzureSas, which associates an AuthAzureSAS provider so requests are authorized with an Azure Shared Access Signature token.

Background. A SAS token grants time-limited, permission-scoped access to Azure Storage resources without exposing the account key on the wire. Use SAS authorization when a query-token approach is preferred over Shared Key headers.

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llSuccess = .F.

loRest = createobject("CkRest")
llBTls = .T.
llBAutoReconnect = .T.
llSuccess = loRest.Connect("example.com",443,llBTls,llBAutoReconnect)
if (llSuccess = .F.) then
    ? loRest.LastErrorText
    release loRest
    return
endif

//  Configure Azure Shared Access Signature (SAS) authentication.  Provide the account access key
//  and the SAS token query parameters; Chilkat adds the SAS token to each request.
loAzSas = createobject("CkAuthAzureSAS")
//  Normally you would not hard-code secrets in source.  You should instead obtain them from an
//  interactive prompt, environment variable, or a secrets vault.
loAzSas.AccessKey = "BASE64_ACCOUNT_ACCESS_KEY"

//  Associate the provider with the REST object.
llSuccess = loRest.SetAuthAzureSas(loAzSas)
if (llSuccess = .F.) then
    ? loRest.LastErrorText
    release loRest
    release loAzSas
    return
endif

lcResponseText = loRest.FullRequestNoBody("GET","/mycontainer/myblob.txt")
if (loRest.LastMethodSuccess = .F.) then
    ? loRest.LastErrorText
    release loRest
    release loAzSas
    return
endif

? lcResponseText


release loRest
release loAzSas