How can I read the HTTP response headers of the page?

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How can I read the HTTP response headers of the page?

7 comments. Current rating: 4 stars

(3 votes). Leave comments and/ or rate it.

The browser object model doesn't provide access to these headers but in IE 5 and newer you have an ActiveX Object Microsoft.XMLDOM which can request the page and return the headers as shown below:

<script language="JavaScript" type="text/javascript">
<!--
var http = new ActiveXObject('Microsoft.XMLHTTP');

// display headers of current document:
http.open('HEAD', location.href, false);
http.send();
alert(http.getAllResponseHeaders())

// or display headers of yahoo.com:
http.open('HEAD', 'http://www.yahoo.com/', false);
http.send();
alert(http.getAllResponseHeaders())

//-->
</script>

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Comments:

2008-04-18, 01:34:48

anonymous from India

How to use this script? can you tell the complete procedure

2008-05-19, 15:51:12

anonymous from United States

How to use it, depends on what you need it to do.
It fires off an AJAX request to the server to fetch just the headers for
the current page, so if you're on a page that has submitted some data or something
you'd get a duplicate request to the server.

If you just want to look at the headers for a given page really quickly int
the browser you can do it like this. (Adapted from above)
Copy the following string, and paste it into the location bar of your IE browser (doesn't
work in FF).
javascript:var http = new ActiveXObject('Microsoft.XMLHTTP');http.open('HEAD', location.href, false);http.send();alert(http.getAllResponseHeaders())

It'll fetch the headers for the page you're sitting on, and display them.

2008-06-20, 03:11:38

[hidden] from Yangon, Myanmar

2009-07-06, 02:38:19

anonymous from Denpasar, Indonesia

The script author seems to have forgotten something in the 'send' method:

http.send(null)

Works a lot better like that. Hope it helps!

2009-12-24, 21:02:32

anonymous

Thank you for the script. But when I run it, I get error on remote url. It's says I didn't have any access.

2009-12-24, 21:16:57

anonymous from China

Hello, I look up in w3schools.com, and find out open method: open('method','URL',async,'uname','pswd')

like your last script, open the remote url, if I don't know password, the last parm, how can I get the header from a remote url?

Thank for you help anyway.

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