Home/ Questions/Q 7726183
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-01T05:09:03+00:00

I have a field where people enter their IP. So I try to validate

  • 0

I have a field where people enter their IP. So I try to validate that field with jquery:

$.validator.addMethod("http-ipvalidation", 
    function(value, element) {
        return /^[\d.]+$/.test(value);
    }, 
   "Sorry, only numbers and dots allowed here"
);

But some people are using DynDNS which can then use an url. So now I need to allow both. Is there a way to combine the default jquery url validation with my custom IP validation?

I could alter the jquery url check but this regex is crazy, so I wouldn’t know where to begin:

return /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i.test(val);

Plus I think it would be nice to allow people to enter without the http(s):// as part of it. So to summarize I want to create validation where users can enter:

12.34.56.78 or my.domain.com or http://my.domain.com

Perhaps, I should just take a simple validation to take out some special characters and leave it at that? Thanks in advance.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I recommend doing nearly nothing to validate this field; IDN means that users can legitimately enter nearly anything into the field: █▄ִ█▄█ִ▀▄▀.tk (currently a domain-squatter) or █ִ̲̲̲̅̅̅bִ̲̲̅̅oִ̲̲̅̅xִ̲̲̅̅eִ̲̲̅̅dִ̲̲̲̅̅̅█.tk (a website cataloging some IDN domain names) or other horrible-looking-yet legal addresses that most browsers can turn into their behind-the-scenes ASCII counterparts.

    • 0