Checking if userinput is a valid URI in XUL
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09-06-2019 - |
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.
Solution
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
}
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