(PowerBuilder) Microsoft Graph OAuth2 Client Credentials Grant Flow

Demonstrates how to get a Microsoft Graph access token using the Client Credentials Grant Flow.

You can use the OAuth 2.0 client credentials grant specified in RFC 6749, sometimes called two-legged OAuth, to access web-hosted resources by using the identity of an application. This type of grant is commonly used for server-to-server interactions that must run in the background, without immediate interaction with a user. These types of applications are often referred to as daemons or service accounts.

For more information, see https://docs.microsoft.com/en-us/azure/active-directory/develop/v2-oauth2-client-creds-grant-flow

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Http
oleobject loo_Req
string ls_Url
oleobject loo_Resp
integer li_StatusCode
oleobject loo_Json

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

loo_Http = create oleobject
// Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if

loo_Req = create oleobject
// Use "Chilkat_9_5_0.HttpRequest" for versions of Chilkat < 10.0.0
li_rc = loo_Req.ConnectToNewObject("Chilkat.HttpRequest")

loo_Req.AddParam("client_secret","CLIENT_SECRET")
loo_Req.AddParam("client_id","CLIENT_ID")
// Don't know if the scopes valid for the client credentials grant are different than the scopes for the 3-legged Authorization Code Grant...
loo_Req.AddParam("scope","https://graph.microsoft.com/.default")
loo_Req.AddParam("grant_type","client_credentials")

// Use your own tenant ID, for example 4d8fdd66-66d1-43b0-ae5c-e31b4b7de5cd
ls_Url = "https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token"
loo_Resp = loo_Http.PostUrlEncoded(ls_Url,loo_Req)
if loo_Http.LastMethodSuccess <> 1 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_Req
    return
end if

li_StatusCode = loo_Resp.StatusCode
Write-Debug "Response status code = " + string(li_StatusCode)

loo_Json = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.Load(loo_Resp.BodyStr)
destroy loo_Resp

loo_Json.EmitCompact = 0
Write-Debug loo_Json.Emit()

// Sample successful output:

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

if li_StatusCode = 200 then
    loo_Json.WriteFile("qa_data/tokens/msGraphClientCredentialsToken.json")
    Write-Debug "Success."
else
    Write-Debug "Failed."
end if



destroy loo_Http
destroy loo_Req
destroy loo_Json