Question

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What is a good regular expression to match a URL?

I have a string sent from the server that looks like this:

“Hey, have a look at this picture here http://example.com/fantastic.jpg, isn’t it nice?”

I would like a regex function which does something like this:

function returnUrl(text) {
    regex here ...
    return url;
}

I am really bad with regex, so I am coming here asking for help. Please have a look at the picture below to get the idea of what I mean:

This is stackOverflow automatically changing my inserted text in a clickable URL, I suppose it’s jQuery / regex.

Thanks in advance.

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EDIT:

Forgot to mention, this regex should only work for images (jpg, png, etc.) not for all links.

Answer 1

A simple one will be :

https?://[\w-\.\?\#\/]+

A complete one (which I use) will be :

[-a-zA-Z0-9@:%_\+.~#?&//=]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&//=]*)?

And the last oe precisely come from What is a good regular expression to match a URL?

EDIT

A simple one for direct image links (see here)

https?://[\w-\.\/]+(\.jpg|\.jpeg|\.png|\.bmp)