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(Xojo Plugin) How to Generate an Azure Service Bus Shared Access Signature (SAS)

Demonstrates generating and using an Azure Service Bus Shared Access Signature (SAS).

Note: This example requires Chilkat v9.5.0.65 or greater.

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// Note: Requires Chilkat v9.5.0.65 or greater.

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// -------------------------------------------------------------------
// Create a Shared Access Signature (SAS) token for Azure Service Bus.
// -------------------------------------------------------------------

Dim authSas As New Chilkat.AuthAzureSAS
authSas.AccessKey = "AzureServiceBus_PrimaryKey"

// The SAS token for Service Bus will look like this:
// (The order of params will be different.  The order does not matter.)
// sig=<signature-string>&se=<expiry>&skn=<keyName>&sr=<URL-encoded-resourceURI>

// Specify the format of the string to sign.
authSas.StringToSign = "resourceURI,expiry"

// Create an expiry to 30 days in the future.
Dim dtExpiry As New Chilkat.CkDateTime
Dim success As Boolean
success = dtExpiry.SetFromCurrentSystemTime()
success = dtExpiry.AddDays(30)
success = authSas.SetTokenParam("expiry","se",dtExpiry.GetAsUnixTimeStr(True))

// Set the skn (keyname)
// This example uses the key "RootManageSharedAccessKey".  This give full access.
// In a typical scenario, you would create a new Azure key (for the service bus)
// in the Azure portal, such that the key has limited permissions.  This would
// allow you to give the SAS token to others for specific access for some period of time.
success = authSas.SetTokenParam("keyName","skn","RootManageSharedAccessKey")

// Set the URL-encoded-resourceURI
Dim sbResourceUri As New Chilkat.StringBuilder
success = sbResourceUri.Append("https://<yournamespace>.servicebus.windows.net/")
success = sbResourceUri.Encode("url","utf-8")
success = authSas.SetTokenParam("resourceURI","sr",sbResourceUri.GetAsString())

// Generate the SAS token.
Dim sasToken As String
sasToken = authSas.GenerateToken()
If (authSas.LastMethodSuccess <> True) Then
    System.DebugLog(authSas.LastErrorText)
    Return
End If

System.DebugLog("SAS token: " + sasToken)

// Save the SAS token to a file.
// We can then use this pre-generated token for future Service Bus operations.
Dim fac As New Chilkat.FileAccess
success = fac.WriteEntireTextFile("qa_data/tokens/serviceBusSas.txt",sasToken,"utf-8",False)

 

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