Visual FoxPro

Vonage UC Extend Refresh Access Token

See more OAuth2 Examples

Refreshes the access token for Vonage UC Extend apps. Visual FoxPro

LOCAL lnSuccess
LOCAL loJsonToken
LOCAL loOauth2
LOCAL loDtExpire
LOCAL loSbJson

lnSuccess = 0

* 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.

loJsonToken = CreateObject('Chilkat.JsonObject')
lnSuccess = loJsonToken.LoadFile("qa_data/tokens/vonage_uc_extend.json")
IF (lnSuccess <> 1) THEN
    ? "Failed to load vonage_uc_extend.json"
    RELEASE loJsonToken
    CANCEL
ENDIF

loOauth2 = CreateObject('Chilkat.OAuth2')

loOauth2.TokenEndpoint = "https://api.vonage.com/token"

* Replace these with actual values.
loOauth2.ClientId = "CLIENT_ID"
loOauth2.ClientSecret = "CLIENT_SECRET"

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

* Send the HTTP POST to refresh the access token..
loOauth2.VerboseLogging = 1
lnSuccess = loOauth2.RefreshAccessToken()
IF (lnSuccess <> 1) THEN
    ? loOauth2.LastErrorText
    RELEASE loJsonToken
    RELEASE loOauth2
    CANCEL
ENDIF

* Load the access token response into the json object 
loJsonToken.Load(loOauth2.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 (loJsonToken.HasMember("expires_on") = 0) THEN
    loDtExpire = CreateObject('Chilkat.CkDateTime')
    loDtExpire.SetFromCurrentSystemTime()
    loDtExpire.AddSeconds(loJsonToken.IntOf("expires_in"))
    loJsonToken.AppendString("expires_on",loDtExpire.GetAsUnixTimeStr(0))
ENDIF

* 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('Chilkat.StringBuilder')
loJsonToken.EmitCompact = 0
loJsonToken.EmitSb(loSbJson)
loSbJson.WriteFile("qa_data/tokens/vonage_uc_extend.json","utf-8",0)

? "OAuth2 authorization granted!"
? "New Access Token = " + loOauth2.AccessToken

RELEASE loJsonToken
RELEASE loOauth2
RELEASE loDtExpire
RELEASE loSbJson