Extract domain regex from form input

Discussion in 'JavaScript' started by RectangleMan, Jan 8, 2011.

0
  1. #1
    I'm trying to grab the TLD from an input form. Having a hard time.

    Here are example inputs.

    http://www.test.com
    http://test.com
    test.com
    http://www.test.com/
    http://www.test.com/index.php
    http://www.test.com/index.php?action=x

    I need the regex to return only "test.com"

    Basically code has to look like this I guess:

    theinput = document.getElementById('domain_input').value;
    var regexp = /([^.]+)(\..*)/;
    var match = regexp.exec(theinput);
    var prefix = match[1];
    var domain = match[2];
    var extra = match[3];
    alert ( domain )

    My issue I believe is the regexp line. I can't seem to get this working at all. Any help is appreciated. If you get me perfect working code I'll Paypal you $5.

    Thanks.
     
    RectangleMan, Jan 8, 2011 IP
  2. kokulusilgi

    kokulusilgi Peon

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    #2 
    function parseUri(sourceUri){
    var uriPartNames = ["source","protocol","authority","domain","port","path","directoryPath","fileName","query","anchor"];
    var uriParts = new RegExp("^(?:([^:/?#.]+):)?(?://)?(([^:/?#]*)(?::(\\d*))?)?((/(?:[^?#](?![^?#/]*\\.[^?#/.]+(?:[\\?#]|$)))*/?)?([^?#/]*))?(?:\\?([^#]*))?(?:#(.*))?").exec(sourceUri);
    var uri = {};
    
    for(var i = 0; i < 10; i++){
        uri[uriPartNames[i]] = (uriParts[i] ? uriParts[i] : "");
    }
    
    if(uri.directoryPath.length > 0){
        uri.directoryPath = uri.directoryPath.replace(/\/?$/, "/");
    }
    domain = uri['domain'];
	onlyhost = domain.replace('www.', '');
    return onlyhost;
}

alert(parseUri('http://www.test.com/index.php?action=x'));
    HTML:
     
    kokulusilgi, Jan 11, 2011 IP
  3. Cash Nebula

    Cash Nebula Peon

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    #3
    Does it have to be a regex? An easier method is to take out the parts one by one:
    
<html>
<head>
<style type="text/css">
p { float: left; font-size: 18px; margin: 0; width: 400px; }
div { clear: both; }
</style>
<script type="text/javascript">
	function getDomain(s) {
		var i = s.indexOf("://");
		if (i != -1) s = s.slice(i + 3, s.length);
		i = s.indexOf("www.");
		if (i != -1) s = s.slice(i + 4, s.length);
		i = s.indexOf(":");
		if (i != -1) s = s.slice(0, i);
		i = s.indexOf("/");
		if (i != -1) s = s.slice(0, i);
		return s;
	}
		
	var test = ["http://www.test.com", "http://test.com", "test.com", "http://www.test.com:8080/", "ftp://www.test.com/index.php", 
	"https://www.test.com/index.php?action=x", "http://test.co.uk/", "http://www.test.co.uk/", "http://subdomain.test.com/"];
	for (i=0; i<test.length; i++) {
		var s = test[i];
		document.write("<div><p>"+s+"</p><p>"+getDomain(s)+"</p></div>");
	}
</script>
</head>
<body>
</body>
</html>
    Code (markup):
     
    Cash Nebula, Jan 11, 2011 IP