(Classic ASP) Zoom OAuth2 Access Token

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Demonstrates how to get a Zoom OAuth2.0 access token for desktop applications.

For more information, see https://developers.zoom.us/docs/integrations/oauth/

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.OAuth2")
set oauth2 = Server.CreateObject("Chilkat.OAuth2")

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

oauth2.AuthorizationEndpoint = "https://zoom.us/oauth/authorize"
oauth2.TokenEndpoint = "https://zoom.us/oauth/token"

' Replace these with actual values.
oauth2.ClientId = "CLIENT_ID"
oauth2.ClientSecret = "CLIENT_SECRET"
oauth2.UseBasicAuth = 1

' Make sure to change to the SPACE separated list of scopes you'll actually need.
oauth2.Scope = "account:read:admin"

' Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
url = oauth2.StartAuth()
If (oauth2.LastMethodSuccess <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( oauth2.LastErrorText) & "</pre>"
    Response.End
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 30 seconds.
numMsWaited = 0
Do While (numMsWaited < 30000) 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()
    Response.Write "<pre>" & Server.HTMLEncode( "No response from the browser!") & "</pre>"
    Response.End
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
    Response.Write "<pre>" & Server.HTMLEncode( "OAuth2 failed to complete.") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( oauth2.FailureInfo) & "</pre>"
    Response.End
End If

If (oauth2.AuthFlowState = 4) Then
    Response.Write "<pre>" & Server.HTMLEncode( "OAuth2 authorization was denied.") & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( oauth2.AccessTokenResponse) & "</pre>"
    Response.End
End If

If (oauth2.AuthFlowState <> 3) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Unexpected AuthFlowState:" & oauth2.AuthFlowState) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "OAuth2 authorization granted!") & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "Access Token = " & oauth2.AccessToken) & "</pre>"

' Get the full JSON response:
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.JsonObject")
set json = Server.CreateObject("Chilkat.JsonObject")
success = json.Load(oauth2.AccessTokenResponse)
json.EmitCompact = 0

' The JSON response looks like this:

Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"

' Save the JSON to a file for future requests.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.FileAccess")
set fac = Server.CreateObject("Chilkat.FileAccess")
success = fac.WriteEntireTextFile("qa_data/tokens/zoom.json",json.Emit(),"utf-8",0)

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