(Xojo Plugin) Vonage UC Extend Refresh Access Token

Refreshes the access token for Vonage UC Extend apps.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

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

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

Dim oauth2 As New Chilkat.OAuth2

oauth2.TokenEndpoint = "https://api.vonage.com/token"

// Replace these with actual values.
oauth2.ClientId = "CLIENT_ID"
oauth2.ClientSecret = "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

// Load the access token response into the json object 
success = jsonToken.Load(oauth2.AccessTokenResponse)

// If an "expires_on" member does not exist, then add the JSON member by
// getting the current system date/time and adding the "expires_in" seconds.
// This way we'll know when the token expires.
If (jsonToken.HasMember("expires_on") = False) Then
    Dim dtExpire As New Chilkat.CkDateTime
    success = dtExpire.SetFromCurrentSystemTime()
    success = dtExpire.AddSeconds(jsonToken.IntOf("expires_in"))
    success = jsonToken.AppendString("expires_on",dtExpire.GetAsUnixTimeStr(False))
End If

// 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.
Dim sbJson As New Chilkat.StringBuilder
jsonToken.EmitCompact = False
success = jsonToken.EmitSb(sbJson)
success = sbJson.WriteFile("qa_data/tokens/vonage_uc_extend.json","utf-8",False)

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