How to check is custom protocol supported

Posted by Piotr Pankowski on Stack Overflow See other posts from Stack Overflow or by Piotr Pankowski
Published on 2010-05-20T08:28:17Z Indexed on 2010/05/20 8:30 UTC
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We are using software that registers its own protocol. We can run application from browser then by link like:

customprotocol://do_this.

but is there a way to check is such custom protocol supported by user`s system? If not we would like to ask user to install software first.

E.g.

if (canHandle ('customprotocol')) {
     // run software
}
else {
    // ask to install
}

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