Checking connection to a server

[clivethebadger]

Hi,
Is it possible to test whether a given URL is reachable within using any server-side scripting?
Cheers,
Jon

[rnd me]

Hi,
Is it possible to test whether a given URL is reachable within using any server-side scripting?
Cheers,
Jon

1. synchronous ajaxing the url. a head request is the quickest.

2. use the domainOK function below to simply check on rules, not existence.

function qualifyPath(paf) { var i = new Image; i.src = paf; return i.src; }
 
function domainOK(paf) { 
var tlc = window.location;
 var myDomain = tlc.hostname || tlc.host; 
var paf3 = qualifyPath(paf); 
var pafDomain = paf3.split(/^https?\:\/\//)[1].split(/\//)[0]; 
return myDomain == pafDomain; }
 
 
 

[clivethebadger]

Btw, my original post should have read:

Hi,
Is it possible to test whether a given URL is reachable without using any server-side scripting?
Cheers,
Jon

[acoder]

The first option suggested by rnd me should work. For an example, see the section titled 'Does a URL exist?' on this page.

[clivethebadger]

The servers I need to test are remote and this method only seems to work for local paths.

Cheers,
Jon

[acoder]

The servers I need to test are remote and this method only seems to work for local paths.

If they're from a different domain, then you will need some server-side code, but you said "without using any server-side scripting" so the answer would be that it's not possible.

[clivethebadger]

Ok, thanks.

What would be easiest method of doing this with minimal server-side scripting?

Thanks,
Jon

[acoder]

Make an http request from your server-side script. All it has to return (print/echo) is 0 or 1 (or true/false). Then the Ajax script can check the response.