PowerBuilder

Refresh a Zoom OAuth2 Access Token

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Refreshes a Zoom OAuth2 access token. When an access token expires, HTTPS requests will receive a 401 status response indicating failure. When that happens, your application can run this code to refresh the access token, and then retry the request using the new access token. Refreshing an access token does not need user interaction (i.e. does not need to display a browser to have the user interactive authorize access). PowerBuilder

integer li_rc
integer li_Success
oleobject loo_JsonToken
oleobject loo_Oauth2
oleobject loo_SbJson

li_Success = 0

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

// It is assumed we previously obtained an OAuth2 access token.
// This example loads the JSON access token file 
// saved by this example: Get Zoom OAuth2 Access Token

loo_JsonToken = create oleobject
li_rc = loo_JsonToken.ConnectToNewObject("Chilkat.JsonObject")
if li_rc < 0 then
    destroy loo_JsonToken
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_JsonToken.LoadFile("qa_data/tokens/zoom.json")
if li_Success <> 1 then
    Write-Debug "Failed to load APP.json"
    destroy loo_JsonToken
    return
end if

// The access token JSON looks like this:

// {
//   "access_token": "eyJz......zpGk0w",
//   "token_type": "bearer",
//   "refresh_token": "eyJzdi........cfgw",
//   "expires_in": 3599,
//   "scope": "account:read:admin"
// }

loo_Oauth2 = create oleobject
li_rc = loo_Oauth2.ConnectToNewObject("Chilkat.OAuth2")

loo_Oauth2.TokenEndpoint = "https://zoom.us/oauth/token"

// Replace these with actual values.
loo_Oauth2.ClientId = "CLIENT_ID"
loo_Oauth2.ClientSecret = "CLIENT_SECRET"

// Get the "refresh_token"
loo_Oauth2.RefreshToken = loo_JsonToken.StringOf("refresh_token")

// Send the HTTP POST to refresh the access token..
li_Success = loo_Oauth2.RefreshAccessToken()
if li_Success <> 1 then
    Write-Debug loo_Oauth2.LastErrorText
    destroy loo_JsonToken
    destroy loo_Oauth2
    return
end if

loo_JsonToken.UpdateString("access_token",loo_Oauth2.AccessToken)

// Save the new JSON access token response to a file.
loo_SbJson = create oleobject
li_rc = loo_SbJson.ConnectToNewObject("Chilkat.StringBuilder")

loo_JsonToken.EmitCompact = 0
loo_JsonToken.EmitSb(loo_SbJson)
loo_SbJson.WriteFile("qa_data/tokens/zoom.json","utf-8",0)

Write-Debug "OAuth2 token refreshed!"
Write-Debug "New Access Token = " + loo_Oauth2.AccessToken


destroy loo_JsonToken
destroy loo_Oauth2
destroy loo_SbJson