location.host vs location.hostname and cross-browser compatibility?

javascript html location window host

2022-08-29 23:13:40

Which one of these is the most effective vs checking if the user agent is accessing via the correct domain.

We would like to show a small js based 'top bar' style warning if they are accessing the domain using some sort of web proxy (as it tends to break the js).

We were thinking about using the following:

var r = /.*domain\.com$/;
if (r.test(location.hostname)) {
    // showMessage ...
}

That would take care of any subdomains we ever use.

Which should we use host or hostname?

In Firefox 5 and Chrome 12:

console.log(location.host);
console.log(location.hostname);

.. shows the same for both.

Is that because the port isn't actually in the address bar?

W3Schools says host contains the port.

Should location.host/hostname be validated or can we be pretty certain in IE6+ and all the others it will exist?

答案 1

As a little memo: the interactive link anatomy

--

In short (assuming a location of ):http://example.org:8888/foo/bar#bang

hostname gives you example.org
host gives you example.org:8888

答案 2

host just includes the port number if there is one specified. If there is no port number specifically in the URL, then it returns the same as hostname. You pick whether you care to match the port number or not. See https://developer.mozilla.org/en/window.location for more info.

I would assume you want hostname to just get the site name.