(Lianja) Refresh QuickBooks OAuth2 Access Token

Demonstrates how to refresh a QuickBooks OAuth2 access token.

Chilkat Lianja Extension Download Chilkat Lianja Extension

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

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

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

loJsonToken = createobject("CkJsonObject")
llSuccess = loJsonToken.LoadFile("qa_data/tokens/qb-access-token.json")
if (llSuccess <> .T.) then
    ? "Failed to load qb-access-token.json"
    release loJsonToken
    return
endif

// 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"
// }

loOauth2 = createobject("CkOAuth2")

loOauth2.TokenEndpoint = "https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer"

// Replace these with actual values.
loOauth2.ClientId = "QUICKBOOKS-CLIENT-ID"
loOauth2.ClientSecret = "QUICKBOOKS-CLIENT-SECRET"

// Get the "refresh_token"
loOauth2.RefreshToken = loJsonToken.StringOf("refresh_token")

// Send the HTTP POST to refresh the access token..
llSuccess = loOauth2.RefreshAccessToken()
if (llSuccess <> .T.) then
    ? loOauth2.LastErrorText
    release loJsonToken
    release loOauth2
    return
endif

// 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.
loJsonToken.UpdateString("access_token",loOauth2.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.
loSbJson = createobject("CkStringBuilder")
loJsonToken.EmitCompact = .F.

loJsonToken.EmitSb(loSbJson)
loSbJson.WriteFile("qa_data/tokens/qb-access-token.json","utf-8",.F.)

? "OAuth2 token refreshed!"
? "New Access Token = " + loOauth2.AccessToken


release loJsonToken
release loOauth2
release loSbJson