Question

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.

Answer 1

The nsIIOService.newURI(…) method is what you’re looking for. It throws NS_ERROR_MALFORMED_URI if the URI string is invalid.

Example:

try {   var ioServ = Components.classes['@mozilla.org/network/io-service;1']                          .getService(Components.interfaces.nsIIOService);   var uriObj = ioServ.newURI(uriString, uriCharset, baseURI); } catch (e) {    // catch the error here  }