VB.NET Requires Chilkat v11.0.0+

Azure OAuth2 Client Credentials Grant Flow

See more OAuth2 Examples

Demonstrates how to get an OAuth2 access token for an Azure Registered App using the Client Credentials Grant Flow.

Note: Your Azure app must be registered as a single-tenant app to use client credentials.

VB.NET

Dim success As Boolean = False

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

Dim http As New Chilkat.Http

Dim req As New Chilkat.HttpRequest
req.AddParam("client_secret","CLIENT_SECRET")
req.AddParam("client_id","CLIENT_ID")

'  See Understanding Scopes in Azure OAuth2 Client Credentials Flow
req.AddParam("scope","https://graph.microsoft.com/.default")

req.AddParam("grant_type","client_credentials")

'  Note: Your Azure app must be registered as a single-tenant app to use client credentials.
'  Use your own tenant ID, for example 4d8fdd66-66d1-43b0-ae5c-e31b4b7de5cd
Dim url As String = "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token"

req.HttpVerb = "POST"
req.ContentType = "application/x-www-form-urlencoded"

Dim resp As New Chilkat.HttpResponse
success = http.HttpReq(url,req,resp)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Dim statusCode As Integer = resp.StatusCode
Debug.WriteLine("Response status code = " & statusCode)

Dim json As New Chilkat.JsonObject
json.Load(resp.BodyStr)

json.EmitCompact = False
Debug.WriteLine(json.Emit())

'  Sample successful output:

'  {
'    "token_type": "Bearer",
'    "expires_in": 3599,
'    "ext_expires_in": 3599,
'    "access_token": "eyJ0eX...K0jOERg"
'  }

If (statusCode = 200) Then
    json.WriteFile("qa_data/tokens/azureClientCredentialsToken.json")
    Debug.WriteLine("Success.")
Else
    Debug.WriteLine("Failed.")
End If