Javascript Regex for serverName:port

Question

What is the best regex that I can use for client validation of URLs of the form;

example.com:8080 (Valid)
10.15.123.14:8080 (Valid)
example.com (Invalid)
10.15.123.14 (Invalid)

The protocol "http" is not necessary/required. In fact that is not going to part of my form field.

What about `/:[1-9][0-9]*$/`? – h2ooooooo May 07 '14 at 11:35 — h2ooooooo, May 07 '14 at 11:35

Yannick · Answer 1 · 2014-05-07T11:51:18.003

3

Matches ip's until 255.255.255.255 and ports until 65535:

^((([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])|[a-zA-Z0-9]*):(6553[0-5]|655[0-2][0-9]\d|65[0-4](\d){2}|6[0-4](\d){3}|[1-5](\d){4}|[1-9](\d){0,3})$

Matches websites (or ip's) and ports until 65535:

^[^:]+:(6553[0-5]|655[0-2][0-9]\d|65[0-4](\d){2}|6[0-4](\d){3}|[1-5](\d){4}|[1-9](\d){0,3})$

edited May 07 '14 at 11:51

answered May 07 '14 at 11:45

Yannick

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+1 for effort, but it'd be **way** better just parsing the string without regex. – h2ooooooo May 07 '14 at 11:55

Reactgular · Accepted Answer · 2014-05-07T11:51:28.693

2

I would go with something like this /^([a-z0-9\-]+\.)+[a-z0-9]+\:[1-9][0-9]+$/i

var str = [
    "Example.com:8080",
    "10.15.123.14:8080",
    "example.com",
    "10.13.123.14",
    "example!1.com:8080",
    "example-1.com:8080",
    "example!1.com:8080",
    "example\1.com:8080",
    "example1.com:8"
    ];

var regex = /^([a-z0-9\-]+\.)+[a-z0-9]+\:[1-9][0-9]+$/i;

for(var i=0; i < str.length; i++) {
    $('#test').append(regex.test(str[i])+"</br>");
}

http://jsfiddle.net/thinkingmedia/2SnhP/5/

edited May 07 '14 at 11:51

answered May 07 '14 at 11:36

Reactgular

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This would also match `google.com:0`. – h2ooooooo May 07 '14 at 11:36
@h2ooooooo true.. hmmm... I'll improve it :) – Reactgular May 07 '14 at 11:37
1

..now all you need is just anchors as without them you'd match `:) I know a website: google.com:8080 is a website you DO NOT WANT TO GO TO`. – h2ooooooo May 07 '14 at 11:39
It is also matching example!1.com:8080 ....I want the only valid special characters as hyphen and dot...Also port number should be numeric 2-4 chars – copenndthagen May 07 '14 at 11:42
why is it matching `!`????? – Reactgular May 07 '14 at 11:43
I just tested on http://jsfiddle.net/2SnhP/4/ – copenndthagen May 07 '14 at 11:46
@testndtv ah, it wasn't matching from the start of the string. it's fixed now. – Reactgular May 07 '14 at 11:51
1

Don't say I didn't warn you: "*now all you need is just anchors*" ;) – h2ooooooo May 07 '14 at 11:56
@h2ooooooo lol, I was too busy in fiddle and missed that and I even upvoted it. I need more coffee. – Reactgular May 07 '14 at 12:05
Thx a lot..just a single issue now..the port number should be between 2-4 numeri chars...so :8 and :80808 should be invalid – copenndthagen May 07 '14 at 12:13
@testndtv change `:[1-9][0-9]+` to `:[1-9][0-9]{1,4}` – Reactgular May 07 '14 at 13:24

Javascript Regex for serverName:port

2 Answers2