(PowerBuilder) Azure AD Service-to-service access token request

Send an Azure AD service-to-service token request to get an access token using a shared secret.

For more information, see https://docs.microsoft.com/en-us/azure/active-directory/develop/v1-oauth2-client-creds-grant-flow#service-to-service-access-token-request

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

integer li_rc
oleobject loo_Http
oleobject loo_Req
oleobject loo_Resp
integer li_RespStatusCode
oleobject loo_Json
string ls_Token_type
string ls_Expires_in
string ls_Ext_expires_in
string ls_Expires_on
string ls_Not_before
string ls_Resource
string ls_Access_token

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

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat_9_5_0.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// To see the exact HTTP request sent and the response, set the SessionLogFilename property:
loo_Http.SessionLogFilename = "qa_output/chilkatHttpLog.txt"

loo_Req = create oleobject
li_rc = loo_Req.ConnectToNewObject("Chilkat_9_5_0.HttpRequest")

// Set the following request params:
// grant_type 	required 	Specifies the requested grant type. In a Client Credentials Grant flow, the value must be client_credentials.
// 
// client_id 	required 	Specifies the Azure AD client id of the calling web service. 
//     To find the calling application's client ID, in the Azure portal, click Azure Active Directory, click App registrations, click the application. 
//     The client_id is the Application ID
// 
// client_secret 	required 	Enter a key registered for the calling web service or daemon application in Azure AD. 
//     To create a key, in the Azure portal, click Azure Active Directory, click App registrations, click the application, click Settings, click Keys, and add a Key.
//     URL-encode this secret when providing it.
// 
// resource 	required 	Enter the App ID URI of the receiving web service. To find the App ID URI, in the Azure portal, click Azure Active Directory, 
//     click App registrations, click the service application, and then click Settings and Properties.

loo_Req.AddParam("grant_type","client_credentials")
loo_Req.AddParam("client_id","MY_CLIENT_ID")
loo_Req.AddParam("client_secret","MY_CLIENT_SECRET")
loo_Req.AddParam("resource","https://service.contoso.com/")

// The URL passed to PostUrlEncoded has this form:   https://login.microsoftonline.com/<tenant_id>/oauth2/token
loo_Resp = loo_Http.PostUrlEncoded("https://login.microsoftonline.com/<tenant_id>/oauth2/token",loo_Req)
if loo_Http.LastMethodSuccess = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_Req
    return
end if

li_RespStatusCode = loo_Resp.StatusCode
Write-Debug "Response Status Code = " + string(li_RespStatusCode)

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_Json.EmitCompact = 0
loo_Json.Load(loo_Resp.BodyStr)
Write-Debug "Response JSON:"
Write-Debug loo_Json.Emit()

if li_RespStatusCode >= 400 then
    Write-Debug "Response Header:"
    Write-Debug loo_Resp.Header
    Write-Debug "Failed."
    destroy loo_Resp
    destroy loo_Http
    destroy loo_Req
    destroy loo_Json
    return
end if

// Sample response:

// {
//   "token_type": "Bearer",
//   "expires_in": "3599",
//   "ext_expires_in": "3599",
//   "expires_on": "1570059833",
//   "not_before": "1570055933",
//   "resource": "https://adminchilkatsoft.onmicrosoft.com/eb1b8ced-76b7-4845-aec5-d3e91776e345",
//   "access_token": "eyJ0eXAiO ... pmgw"
// }

// To get the items from the JSON....
ls_Token_type = loo_Json.StringOf("token_type")
ls_Expires_in = loo_Json.StringOf("expires_in")
ls_Ext_expires_in = loo_Json.StringOf("ext_expires_in")
ls_Expires_on = loo_Json.StringOf("expires_on")
ls_Not_before = loo_Json.StringOf("not_before")
ls_Resource = loo_Json.StringOf("resource")
ls_Access_token = loo_Json.StringOf("access_token")

destroy loo_Resp


destroy loo_Http
destroy loo_Req
destroy loo_Json