(PowerBuilder) Refresh a Frame.io OAuth2 Access Token

Refreshes a Frame.io OAuth2 access token. When an access token expires, HTTPS requests will receive a 401 status response indicating failure. When that happens, your application can run this code to refresh the access token, and then retry the request using the new access token. Refreshing an access token does not need user interaction (i.e. does not need to display a browser to have the user interactive authorize access).

Note: This example requires Chilkat v9.5.0.84 or greater.

For more information, see https://docs.frame.io/docs/refresh-tokens

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

integer li_rc
oleobject loo_JsonToken
integer li_Success
oleobject loo_Oauth2
oleobject loo_SbJson

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

// IMPORTANT: This example requires Chilkat v9.5.0.84 or greater because of an internal modification required to support frame.io
// IMPORTANT: This example requires Chilkat v9.5.0.84 or greater because of an internal modification required to support frame.io
// IMPORTANT: This example requires Chilkat v9.5.0.84 or greater because of an internal modification required to support frame.io

// It is assumed we previously obtained an OAuth2 access token.
// This example loads the JSON access token file 
// saved by this example: Get Frame.io OAuth2 Access Token

loo_JsonToken = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_JsonToken.ConnectToNewObject("Chilkat.JsonObject")
if li_rc < 0 then
    destroy loo_JsonToken
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_JsonToken.LoadFile("qa_data/tokens/frame_io.json")
if li_Success <> 1 then
    Write-Debug "Failed to load APP.json"
    destroy loo_JsonToken
    return
end if

// The access token JSON looks like this:

// {
//   "access_token": "kwenK_QQnQipMZGtlGreCwrjUxMBr4OX-XAEVA0Q3Rg.yFqYY_c-Mw_k59X1e9rTYR5m-EWf9ivWc1kqmsxR2v4",
//   "expires_in": 3600,
//   "refresh_token": "ZI7XDR0lWoKAXYxPs8BW7bU2IJg3za0zlimMfvTEhUg.pffnx7xye30Eps6OZEYcdzrINFSM3fM5zi78ln7QQ3o",
//   "scope": "offline asset.create asset.read asset.update asset.delete",
//   "token_type": "bearer"
// }

loo_Oauth2 = create oleobject
// Use "Chilkat_9_5_0.OAuth2" for versions of Chilkat < 10.0.0
li_rc = loo_Oauth2.ConnectToNewObject("Chilkat.OAuth2")

loo_Oauth2.TokenEndpoint = "https://applications.frame.io/oauth2/token"

// Replace these with actual values.
loo_Oauth2.ClientId = "CLIENT_ID"
loo_Oauth2.ClientSecret = "CLIENT_SECRET"

// Frame.io sends the client ID and secret using HTTP basic authentication.
loo_Oauth2.UseBasicAuth = 1

// Get the "refresh_token"
loo_Oauth2.RefreshToken = loo_JsonToken.StringOf("refresh_token")

// Send the HTTP POST to refresh the access token..
li_Success = loo_Oauth2.RefreshAccessToken()
if li_Success <> 1 then
    Write-Debug loo_Oauth2.LastErrorText
    destroy loo_JsonToken
    destroy loo_Oauth2
    return
end if

Write-Debug "New access token: " + loo_Oauth2.AccessToken
Write-Debug "New refresh token: " + loo_Oauth2.RefreshToken

// Update the JSON with the new tokens.
loo_JsonToken.UpdateString("access_token",loo_Oauth2.AccessToken)
loo_JsonToken.UpdateString("refresh_token",loo_Oauth2.RefreshToken)

// Save the new JSON access token response to a file.
loo_SbJson = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbJson.ConnectToNewObject("Chilkat.StringBuilder")

loo_JsonToken.EmitCompact = 0
loo_JsonToken.EmitSb(loo_SbJson)
loo_SbJson.WriteFile("qa_data/tokens/frame_io.json","utf-8",0)

Write-Debug "OAuth2 token refreshed!"
Write-Debug "New Access Token = " + loo_Oauth2.AccessToken


destroy loo_JsonToken
destroy loo_Oauth2
destroy loo_SbJson