public static String getURLProtocol ( String urlString ) { String protocol = null ; int firstColon = urlString . indexOf ( ' ' ) ; if ( firstColon >= 0 ) { String specifiedProtocol = urlString . substring ( 0 , firstColon ) ; if ( FindBugs . knownURLProtocolSet . contains ( specifiedProtocol ) ) { protocol = specifiedProtocol ; } } return protocol ; }
Get the URL protocol of given URL string .