Checks that url is an absolute https URL. The player refuses plain http: hold audio is fetched by the server, and a cleartext fetch would let anyone on the path substitute what callers hear.
url
when the URL is malformed or not https.
Checks that
urlis an absolute https URL. The player refuses plain http: hold audio is fetched by the server, and a cleartext fetch would let anyone on the path substitute what callers hear.