(PowerBuilder) Refresh Schwab OAuth2 Access Token

See more Schwab Examples

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

integer li_rc
integer li_Success
oleobject loo_JsonToken
oleobject loo_Oauth2
oleobject loo_SbJson

li_Success = 0

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

// See Get Schwab OAuth2 Access Token 
// for sample code showing how to obtain a Schwab access token for desktop apps.

// This example assumes we previously obtained an OAuth2 access token for Schwab.

loo_JsonToken = create oleobject
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/schwab-access-token.json")
if li_Success <> 1 then
    Write-Debug "Failed to load schwab-access-token.json"
    destroy loo_JsonToken
    return
end if

// The access token JSON looks something like this:

// {
//   "expires_in": 3600,
//   "x_refresh_token_expires_in": 8726400,
//   "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
//   "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
//   "token_type": "bearer"
// }

loo_Oauth2 = create oleobject
li_rc = loo_Oauth2.ConnectToNewObject("Chilkat.OAuth2")

loo_Oauth2.TokenEndpoint = "https://api.schwabapi.com/v1/oauth/token"

// Replace these with actual values.
loo_Oauth2.ClientId = "APP_KEY"
loo_Oauth2.ClientSecret = "APP_SECRET"
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 = 0 then
    Write-Debug loo_Oauth2.LastErrorText
    destroy loo_JsonToken
    destroy loo_Oauth2
    return
end if

// The response contains a new access token, but we must keep
// our existing refresh token for when we need to refresh again in the future.
loo_JsonToken.UpdateString("access_token",loo_Oauth2.AccessToken)

// Save the new JSON access token response to a file.
// The access + refresh tokens contained in this JSON will be needed for the next refresh.
loo_SbJson = create oleobject
li_rc = loo_SbJson.ConnectToNewObject("Chilkat.StringBuilder")

loo_JsonToken.EmitCompact = 0

loo_JsonToken.EmitSb(loo_SbJson)
loo_SbJson.WriteFile("qa_data/tokens/schwab-access-token.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