(PowerBuilder) RSAP Union API - Get OAuth2 Access Token

Demonstrates how to get an OAuth2 access token for the RSAP Union API. Note: This uses the client credentials flow, which does NOT require an interactive engagement using a browser.

For more information, see https://app.swaggerhub.com/apis-docs/pderas/RSAP/2.0.1#/Authentication/getOauthToken

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

integer li_rc
oleobject loo_Http
integer li_Success
oleobject loo_Json
oleobject loo_Cert
oleobject loo_PrivKey
oleobject loo_Resp
oleobject loo_SbResponseBody
oleobject loo_JResp
integer li_RespStatusCode

// This example assumes 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

// The following JSON is sent in the request body.

// {
//   "grant_type": "client_credentials",
//   "client_id": 1234,
//   "client_secret": "23456abcde"
// }

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

loo_Json.UpdateString("grant_type","client_credentials")
loo_Json.UpdateInt("client_id",1234)
loo_Json.UpdateString("client_secret","23456abcde")

loo_Http.SetRequestHeader("Content-type","application/json")

// Add the client certificate TLS authentication.
loo_Cert = create oleobject
li_rc = loo_Cert.ConnectToNewObject("Chilkat_9_5_0.Cert")

li_Success = loo_Cert.LoadFromFile("qa_data/certs_and_keys/union_client_certificate.crt")
if li_Success = 0 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Http
    destroy loo_Json
    destroy loo_Cert
    return
end if

loo_PrivKey = create oleobject
li_rc = loo_PrivKey.ConnectToNewObject("Chilkat_9_5_0.PrivateKey")

li_Success = loo_PrivKey.LoadAnyFormatFile("qa_data/certs_and_keys/union_client_certificate.nopass.key","")
if li_Success = 0 then
    Write-Debug loo_PrivKey.LastErrorText
    destroy loo_Http
    destroy loo_Json
    destroy loo_Cert
    destroy loo_PrivKey
    return
end if

// Associate the private key with the cert.
// This will fail if the private key is not actually the correct one that corresponds to the public key stored within the cert.
li_Success = loo_Cert.SetPrivateKey(loo_PrivKey)
if li_Success = 0 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Http
    destroy loo_Json
    destroy loo_Cert
    destroy loo_PrivKey
    return
end if

// Tell HTTP to use the cert for client TLS certificate authentication.
li_Success = loo_Http.SetSslClientCert(loo_Cert)
if li_Success = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_Json
    destroy loo_Cert
    destroy loo_PrivKey
    return
end if

loo_Resp = loo_Http.PostJson3("https://api-test.rsap.ca/oauth/token","application/json",loo_Json)
if loo_Http.LastMethodSuccess = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_Json
    destroy loo_Cert
    destroy loo_PrivKey
    return
end if

loo_SbResponseBody = create oleobject
li_rc = loo_SbResponseBody.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

loo_Resp.GetBodySb(loo_SbResponseBody)
loo_JResp = create oleobject
li_rc = loo_JResp.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_JResp.LoadSb(loo_SbResponseBody)
loo_JResp.EmitCompact = 0

Write-Debug "Response Body:"
Write-Debug loo_JResp.Emit()

li_RespStatusCode = loo_Resp.StatusCode
Write-Debug "Response Status Code = " + string(li_RespStatusCode)
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_Json
    destroy loo_Cert
    destroy loo_PrivKey
    destroy loo_SbResponseBody
    destroy loo_JResp
    return
end if

destroy loo_Resp

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// {
//   "token_type": "Bearer",
//   "expires_in": 3600,
//   "access_token": "eyJ0eXAi...LnE"
// }

// This token expires in 1 hour.  Your application could re-use the same token for up to an hour,
// or it can simply get a new access token before each request (if you're not doing too many requests).
li_Success = loo_JResp.WriteFile("qa_data/tokens/rsapToken.json")


destroy loo_Http
destroy loo_Json
destroy loo_Cert
destroy loo_PrivKey
destroy loo_SbResponseBody
destroy loo_JResp