CanvasAutorize - redirection to facebook permissions dialog clears the request_ids query string sent when user accepts an app request_问答_开发者

CanvasAutorize - redirection to facebook permissions dialog clears the request_ids query string sent when user accepts an app request

开发者 https://www.devze.com 2023-02-11 03:27 出处：网络

When a user accepts my application request, the user is redirected to my app page with a parameter request_ids which is the request id info for 开发者_JS百科that application request. The problem is that my app page has the [CanvasAuthorize] attribute that redirects the user to the permissions grant dialog and when user accepts it it returns the app entry point, but during this transfer i lose the request_ids querystring and cannot use the request id in my code.

How can I avoid this? What are the recommendations?

Thanks!

I overcome this by redirecting manually the ActionResult to an empty template with the following javascript autogen code:

public static string GetCanvasRedirectHtml(string url)
        {
            var fbApp = new FacebookApp();

            string authUrl = string.Format("http://www.facebook.com/dialog/oauth?client_id={0}&redirect_uri={1}&scope={2}", fbApp.AppId, url, requiredAppPermissions);

            if (string.IsNullOrEmpty(url))
            {
                throw new ArgumentNullException("url");
            }

            return "<html><head>" +
                   "<script type=\"text/javascript\">\n" +
                    "top.location = \"" + authUrl + "\";\n" +
                    "</script>" +
                   "</head><body></body></html>";
        }

This would give me back the access_code that I would later on exchange for the accesstoken and get a valid session.

HTH someone!