Xojo Plugin

Google People API Refresh Access Token

See more Google People Examples

Demonstrates how to refresh a Google Access Token for the Google People API. Xojo Plugin

Dim success As Boolean
success = False

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

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

Dim jsonToken As New Chilkat.JsonObject
success = jsonToken.LoadFile("qa_data/tokens/googlePeople.json")
If (success <> True) Then
    System.DebugLog("Failed to load googlePeople.json")
    Return
End If

// The access token JSON looks like this:

// {
//   "access_token": "ya29.a0AfH6S ... LAZYFUkf0",
//   "expires_in": 3599,
//   "refresh_token": "1//0fL_Ov ... ee0",
//   "scope": "https://www.googleapis.com/auth/contacts",
//   "token_type": "Bearer"
// }

Dim oauth2 As New Chilkat.OAuth2

oauth2.TokenEndpoint = "https://www.googleapis.com/oauth2/v4/token"

// Replace these with actual values.
oauth2.ClientId = "GOOGLE-CLIENT-ID"
oauth2.ClientSecret = "GOOGLE-CLIENT-SECRET"

// Get the "refresh_token"
oauth2.RefreshToken = jsonToken.StringOf("refresh_token")

// Send the HTTP POST to refresh the access token..
success = oauth2.RefreshAccessToken()
If (success <> True) Then
    System.DebugLog(oauth2.LastErrorText)
    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.
success = jsonToken.UpdateString("access_token",oauth2.AccessToken)

// Save the new JSON access token response to a file.
Dim sbJson As New Chilkat.StringBuilder
jsonToken.EmitCompact = False
success = jsonToken.EmitSb(sbJson)
success = sbJson.WriteFile("qa_data/tokens/googlePeople.json","utf-8",False)

System.DebugLog("OAuth2 authorization granted!")
System.DebugLog("New Access Token = " + oauth2.AccessToken)