PowerBuilder Google Drive: Get Starting pageToken for Listing Future Changes

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Gets the starting pageToken for listing future changes.

Documentation: https://developers.google.com/drive/v3/reference/changes/getStartPageToken

integer li_rc
oleobject loo_Rest
integer li_Success
oleobject loo_Oauth2
oleobject loo_SbJson
oleobject loo_Json
string ls_Kind
string ls_StartPageToken

loo_Rest = create oleobject
li_rc = loo_Rest.ConnectToNewObject("Chilkat_9_5_0.Rest")
if li_rc < 0 then
    destroy loo_Rest
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//   Provide a previously obtained OAuth2 access token.
loo_Oauth2 = create oleobject
li_rc = loo_Oauth2.ConnectToNewObject("Chilkat_9_5_0.OAuth2")

loo_Oauth2.AccessToken = "OAUTH2_ACCESS_TOKEN"
loo_Rest.SetAuthOAuth2(loo_Oauth2)

li_Success = loo_Rest.Connect("www.googleapis.com",443,1,1)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_Oauth2
    return
end if

loo_Rest.AddQueryParam("teamDriveId","0AEd3EhGff2SaUk9PVA")
loo_Rest.AddQueryParam("supportsTeamDrives","true")

loo_SbJson = create oleobject
li_rc = loo_SbJson.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

li_Success = loo_Rest.FullRequestNoBodySb("GET","/drive/v3/changes/startPageToken",loo_SbJson)
if li_Success <> 1 then
    Write-Debug loo_Rest.LastErrorText
    destroy loo_Rest
    destroy loo_Oauth2
    destroy loo_SbJson
    return
end if

if loo_Rest.ResponseStatusCode <> 200 then
    Write-Debug "Received error response code: " + string(loo_Rest.ResponseStatusCode)
    Write-Debug "Response body:"
    Write-Debug loo_SbJson.GetAsString()
    destroy loo_Rest
    destroy loo_Oauth2
    destroy loo_SbJson
    return
end if

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_Json.LoadSb(loo_SbJson)

//  The following code parses the JSON response.
//  A sample JSON response is shown below the sample code.

ls_Kind = loo_Json.StringOf("kind")
ls_StartPageToken = loo_Json.StringOf("startPageToken")

Write-Debug "Example Completed."


destroy loo_Rest
destroy loo_Oauth2
destroy loo_SbJson
destroy loo_Json

Sample JSON Response Body

{
  "kind": "drive#startPageToken",
  "startPageToken": "13"
}