Qt5 - How to make qurl detect wether the given url is local or not and add "http://" if not?

Question

QUrl class can be used to open both local or online file. I used QLineEdit to take URL as QString and give it to QUrl. The program can access both local and online file. My point question is: is there any official way to automatically detect if the given url is local or online and add http:// automatically if the url is online?

For example, if user type www.google.com, it should be online and should be added http:// before it being processed. If user type /home/username/somepath it should be offline.

Of course a little if and else thing with string pattern check can be used for this purpose. My question is, if there's officially supported way to do something like this from Qt5.

Answer 1

You can use QUrl:fromUserInput(...) for that purpose.

QString first("qt-project.org");
QString second("ftp.qt-project.org");
QString third("hostname");
QString fourth("/home/user/test.html");

qDebug() << QUrl::fromUserInput(first);   // QUrl( "http://qt-project.org" )       
qDebug() << QUrl::fromUserInput(second);  // QUrl( "ftp://ftp.qt-project.org" )    
qDebug() << QUrl::fromUserInput(third);   // QUrl( "http://hostname" )             
qDebug() << QUrl::fromUserInput(fourth);  // QUrl( "file:///home/user/test.html" )