The code tried hard to ignore garbage URLs, as Qt is quite lenient, e.g. QUrl("Garbage Url") is still valid.
There is no way to change the strictness of a QUrl after creation, so the code would enforce it by doing QUrl strictUrl(inputUrl.toString(), QUrl::StrictMode).
However, toString() defaults to PrettyDecoded which avoids percent-encoding and keeps spaces in tact which is not a valid thing to have in a strict URL.
Effectively, we want to ensure a URL is either a valid path to a local file, or one of the special applications (for menu ids), or preferred for preferred applications, like web browser,