Xojo Plugin

Vonage UC Extend OAuth2

See more OAuth2 Examples

Get an OAuth2 access token for a desktop application for Vonage. 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.

Dim oauth2 As New Chilkat.OAuth2

// This should be the port in the localhost callback URL for your app.  
// The callback URL would look like "http://localhost:3800/" if the port number is 3017.
oauth2.ListenPort = 3800

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

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

oauth2.Scope = "openid"

// Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
Dim url As String
url = oauth2.StartAuth()
If (oauth2.LastMethodSuccess <> True) Then
    System.DebugLog(oauth2.LastErrorText)
    Return
End If

System.DebugLog("url = " + url)

// Launch the default browser on the system and navigate to the url.
// The LaunchBrowser method was added in Chilkat v10.1.2.
success = oauth2.LaunchBrowser(url)
If (success = False) Then
    System.DebugLog(oauth2.LastErrorText)
    Return
End If

// Wait for the user to approve or deny authorization in the browser.
Dim numMsWaited As Int32
numMsWaited = 0
While (numMsWaited < 90000) And (oauth2.AuthFlowState < 3)
    oauth2.SleepMs 100
    numMsWaited = numMsWaited + 100
Wend

// If the browser does not respond within the specified time, AuthFlowState will be:
// 
// 1: Waiting for Redirect - The OAuth2 background thread is waiting for the browser's redirect request.
// 2: Waiting for Final Response - The thread is awaiting the final access token response.
// In either case, cancel the background task initiated by StartAuth.

If (oauth2.AuthFlowState < 3) Then
    success = oauth2.Cancel()
    System.DebugLog("No response from the browser!")
    Return
End If

// Check AuthFlowState to determine if authorization was granted, denied, or failed:
// 
// 3: Success - OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
// 4: Access Denied - OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
// 5: Failure - OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

If (oauth2.AuthFlowState = 5) Then
    System.DebugLog("OAuth2 failed to complete.")
    System.DebugLog(oauth2.FailureInfo)
    Return
End If

If (oauth2.AuthFlowState = 4) Then
    System.DebugLog("OAuth2 authorization was denied.")
    System.DebugLog(oauth2.AccessTokenResponse)
    Return
End If

If (oauth2.AuthFlowState <> 3) Then
    System.DebugLog("Unexpected AuthFlowState:" + Str(oauth2.AuthFlowState))
    Return
End If

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

// Get the full JSON response:
Dim json As New Chilkat.JsonObject
success = json.Load(oauth2.AccessTokenResponse)
json.EmitCompact = False
System.DebugLog(json.Emit())

// The JSON response looks like this:

// {
//   "access_token": "XXXXXXXX-XXX-XXXX-XXXX-XXXXXXXXXXXX",
//   "refresh_token": "XXXXXXXX-XXX-XXXX-XXXX-XXXXXXXXXXXX",
//   "scope": "openid",
//   "id_token": "eyJ4NXQiOiJNem ... hA9tbDCiQRhdI4T0",
//   "token_type": "Bearer",
//   "expires_in": 3600
// }

// Save the JSON to a file for future requests.
Dim fac As New Chilkat.FileAccess
success = fac.WriteEntireTextFile("qa_data/tokens/vonage_uc_extend.json",json.Emit(),"utf-8",False)