Const
An absolute http:/https: URL (obtainKey()'s sourceUrl). A custom transport may do no scheme check of its own, so a file:/ftp: URL is never handed to it.
http:
https:
sourceUrl
file:
ftp:
An absolute
http:/https:URL (obtainKey()'ssourceUrl). A custom transport may do no scheme check of its own, so afile:/ftp:URL is never handed to it.