Get "Last-modified" header from server

[Anon]

Hi,

When i do a simple HTTP request like this one:
HEAD /index.htm HTTP/1.0

'Last modified' header isn't returned, i do have some headers but not this one.

My qestion is, How can i do in order to get the 'Last Modified' header from the serv?
May i have to specify an extra header to my request ?

Thx in advance for your help

[yelvington]

You need to open a socket and send the request.

Here's an example without any error checking. Set the obvious variables first, then...

$fp = fsockopen($server, $port);
fputs($fp, "HEAD $uri HTTP/1.0\r\n\r\n");
$response = fread($fp,4096);

If this is a name-based host, you will need to use HTTP/1.1 and send a more complex string.

[Anon]

This is what i did but only a few header are showed (Date, Server,Connection, Content-Type only)

Any solution ?

[kparker]

Have you read the HTTP RFCs for more information? Consulting RFC 2616, section 14.29, we find:

  HTTP/1.1 servers SHOULD send Last-Modified whenever feasible.

I.e. it is encouraged but not required. I would guess if you're not getting from a particular server as a matter of course, you're not going to be able to get it.