Example B-1 shows the request line:
HEAD / HTTP/1.0
followed by the server response. The HEAD
keyword asks the server to respond with only the HTTP response header fields and not the whole requested document, which is useful if the requested page is large, or the request is for an image. The HEAD
keyword is followed by the resource component of the URL and the version of HTTP that the client supports. To see a full response, the request line:
GET / HTTP/1.1
is entered followed by a blank line.
Example B-1. A simulated HTTP request using telnet
% telnet www.w3.org 80 Trying 18.29.1.35... Connected to www.w3.org. Escape character is '^]'. HEAD / HTTP/1.1 HTTP/1.1 200 OK Date: Wed, 26 Sep 2001 03:42:32 GMT Server: Apache/1.3.6 (Unix) PHP/3.0.11 P3P: policyref="http://www.w3.org/2001/05/P3P/p3p.xml" Cache-Control: max-age=600 Expires: Wed, 26 Sep 2001 03:52:32 GMT Last-Modified: Tue, 25 Sep 2001 21:08:00 GMT ETag: "5b42a7-4b06-3bb0f230" Accept-Ranges: bytes Content-Length: 19206 Connection: close Content-Type: text/html; charset=us-ascii Connection closed by foreign host. %