Take the 2-minute tour ×  Is there a built-in function/method
that can check if a given string is a valid URI or not in the
Mozilla XUL toolkit? I have looked for one but found none, but
since this is my first time using XUL and its documentation it
could be that I just overlooked it. So I'm just making sure
before I start writing my own IsValidURI function.
share|improve this question add comment  1 Answer  up vote 3
down vote accepted  The nsIIOService.newURI(...) method is what
you're looking for. It throws NS_ERROR_MALFORMED_URI if the URI
string is invalid.   try {   var ioServ =
Components.classes["@mozilla.org/network/io-service;1"]   var
uriObj = ioServ.newURI(uriString, uriCharset, baseURI); } catch
(e) {    // catch the error here  share|improve this answer add
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