extract url from string with Javascript

Question

hi everyone, this sounds like something you could just google, but been looking for hours.

basically have this string i am ajaxing from another site

'function onclick(event) { toFacebook("http://www.domain.com.au/deal/url-test?2049361208?226781981"); }'

it comes out like that because im extracting the onclick.

i just want to extract the url from the string.

any help would be greatly appreciated.

---- edit ----

OK IF I GO HERE..http://regexlib.com/RESilverlight.aspx regext online tester

and run this regex.

(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?

on my string, it highlights the url perfectly.. i just can get it to run with JS?

Answer 1

if it is always with the dash (i'm assuming you want everything before the dash), you can use the split method:

var arr = split(val);

your data will be in arr[0]

Answer 2

you can use these functions in javascript:

function parseUrl1(data) {
var e=/^((http|ftp):\/)?\/?([^:\/\s]+)((\/\w+)*\/)([\w\-\.]+\.[^#?\s]+)(#[\w\-]+)?$/;

if (data.match(e)) {
    return  {url: RegExp['$&'],
            protocol: RegExp.$2,
            host:RegExp.$3,
            path:RegExp.$4,
            file:RegExp.$6,
            hash:RegExp.$7};
}
else {
    return  {url:"", protocol:"",host:"",path:"",file:"",hash:""};
}
}

function parseUrl2(data) {
var e=/((http|ftp):\/)?\/?([^:\/\s]+)((\/\w+)*\/)([\w\-\.]+\.[^#?\s]+)(#[\w\-]+)?/;

if (data.match(e)) {
    return  {url: RegExp['$&'],
            protocol: RegExp.$2,
            host:RegExp.$3,
            path:RegExp.$4,
            file:RegExp.$6,
            hash:RegExp.$7};
}
else {
    return  {url:"", protocol:"",host:"",path:"",file:"",hash:""};
}
}

References :http://lawrence.ecorp.net/inet/samples/regexp-parse.php

Answer 3

Use Regular Expressions:

http://stackoverflow.com/questions/369147/javascript-regex-to-extract-anchor-text-and-url-from-anchor-tags

var url_match = /https?:\/\/([-\w.]+)+(:\d+)?(\/([\w/_.]*(\?\S+)?)?)?/;

alert(url_match.test("http://stackoverflow.com"));

Answer 4

just ended up doing this

$a.substring($a.indexOf("http:"), $a.indexOf("?"))

regular expressions are beyond me.