B4X 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.

B4X

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 ChilkatHttp
http.Initialize("http")

Dim req As ChilkatHttpRequest
req.Initialize
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 ChilkatHttpResponse
resp.Initialize
success = http.HttpReq(url, req, resp)
If success = False Then
    Log(http.LastErrorText)
    Return
End If


Dim statusCode As Int = resp.StatusCode
Log("Response status code = " & statusCode)

Dim json As ChilkatJsonObject
json.Initialize
json.Load(resp.BodyStr)

json.EmitCompact = False
Log(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")
    Log("Success.")
Else
    Log("Failed.")
End If