If all you're worried about is not sending content, I believe a lot of
web servers will handle this for you. I have a few mod_perl servers
(including masonhq.com) that don't do anything special for HEAD, and
no content gets sent anyway, so I assume Apache is throwing away the
content:
swartz> telnet masonhq.com 80
Trying 208.185.231.106...
Connected to masonhq.com.
Escape character is '^]'.
HEAD / HTTP/1.0
HTTP/1.1 200 OK
Date: Thu, 01 Oct 2009 17:58:39 GMT
Server: Apache/1.3.33 (Unix) mod_perl/1.29
Content-Type: text/html
X-Cache: MISS from www.masonhq.com
Connection: close
Connection closed by foreign host.
Of course, this is wasting processing time, but that only matters if
you are getting more than a trivial number of HEAD requests.
Interestingly I just noticed the other day that Amazon returns a 405
on HEAD requests. I wonder if this is an oversight or a statement on
the modern irrelevance of HEAD requests?
swartz> HEAD http://www.amazon.com/
405 MethodNotAllowed
Jon
On Oct 1, 2009, at 5:18 AM, Jérôme Etévé wrote:
> Hi all,
>
> I'm wondering how to handle HEAD requests with mason.
> The w3c states : "The HEAD method is identical to GET except that the
> server MUST NOT return a message-body in the response."
>
> So I'd like to know if there's a way to just send the http headers and
> skip the content with Mason, so a Mason site can be standard compliant
> on this point.
>
> Would this code in my top level component (after any other call that
> could modify the headers) be enough ?:
>
> if ( $ENV{'HTTP_METHOD'} eq 'HEAD' ){
> $m->clear_buffer() ;
> $r->send_http_header() ;
> $m->abort() ;
> }
>
>
> Thanks for any help!
>
> Jerome.
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