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(Excel) Vonage UC Extend OAuth2

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

Download Excel Class Modules

Chilkat Excel Class Modules

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

Dim oauth2 As Chilkat.OAuth2
Set oauth2 = Chilkat.NewOAuth2

' 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 three-legged flow.  This returns a URL that should be loaded in a browser.

url = oauth2.StartAuth()
If (oauth2.LastMethodSuccess <> True) Then
    Debug.Print oauth2.LastErrorText
    Exit Sub
End If

' At this point, your application should load the URL in a browser.
' For example, 
' in C#: System.Diagnostics.Process.Start(url);
' in Java: Desktop.getDesktop().browse(new URI(url));
' in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
'              wsh.Run url
' in Xojo: ShowURL(url)  (see http://docs.xojo.com/index.php/ShowURL)
' in Dataflex: Runprogram Background "c:\Program Files\Internet Explorer\iexplore.exe" sUrl        
' The Microsoft account owner would interactively accept or deny the authorization request.

' Add the code to load the url in a web browser here...
' Add the code to load the url in a web browser here...
' Add the code to load the url in a web browser here...

' Now wait for the authorization.
' We'll wait for a max of 60 seconds.

numMsWaited = 0
Do While (numMsWaited < 60000) And (oauth2.AuthFlowState < 3)
    oauth2.SleepMs 100
    numMsWaited = numMsWaited + 100
Loop

' If there was no response from the browser within 30 seconds, then 
' the AuthFlowState will be equal to 1 or 2.
' 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
' 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
' In that case, cancel the background task started in the call to StartAuth.
If (oauth2.AuthFlowState < 3) Then
    success = oauth2.Cancel()
    Debug.Print "No response from the browser!"
    Exit Sub
End If

' Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
' The possible AuthFlowState values are:
' 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
' 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
' 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
If (oauth2.AuthFlowState = 5) Then
    Debug.Print "OAuth2 failed to complete."
    Debug.Print oauth2.FailureInfo
    Exit Sub
End If

If (oauth2.AuthFlowState = 4) Then
    Debug.Print "OAuth2 authorization was denied."
    Debug.Print oauth2.AccessTokenResponse
    Exit Sub
End If

If (oauth2.AuthFlowState <> 3) Then
    Debug.Print "Unexpected AuthFlowState:"; oauth2.AuthFlowState
    Exit Sub
End If

Debug.Print "OAuth2 authorization granted!"
Debug.Print "Access Token = "; oauth2.AccessToken

' Get the full JSON response:
Dim json As Chilkat.JsonObject
Set json = Chilkat.NewJsonObject
success = json.Load(oauth2.AccessTokenResponse)
json.EmitCompact = False
Debug.Print 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 Chilkat.FileAccess
Set fac = Chilkat.NewFileAccess
success = fac.WriteEntireTextFile("qa_data/tokens/vonage_uc_extend.json",json.Emit(),"utf-8",False)

 

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