def getAppInfo(self, appId):
        """
        Every application registered with Portal for ArcGIS has a unique
        client ID and a list of redirect URIs that are used for OAuth. This
        operation returns these OAuth-specific properties of an application.
        You can use this information to update the redirect URIs by using
        the Update App Info operation.

        Input:
           appId - unique id of the application to get the information
            about.
        """
        params = {
            "f" : "json",
            "appID" : appId
        }
        url = self._url + "/oauth/getAppInfo"
        return self._get(url=url, param_dict=params,
                         proxy_url=self._proxy_url,
                         proxy_port=self._proxy_port)