A new Request for Comments is now available in online RFC libraries.


        RFC 2227

	Title:      Simple Hit-Metering and Usage-Limiting for HTTP
	Author:     J. Mogul, P. Leach
        Status:     Proposed Standard
	Date:       October 1997
        Mailbox:    mogul@wrl.dec.com, paulle@microsoft.com
        Pages:      37
        Characters: 85127
        Updates/Obsoletes: None	

        URL:        ftp://ds.internic.net/rfc/rfc2227.txt


This document proposes a simple extension to HTTP, using a new "Meter"
header, which permits a limited form of demographic information
(colloquially called "hit-counts") to be reported by caches to origin
servers, in a more efficient manner than the "cache-busting"
techniques currently used.  It also permits an origin server to
control the number of times a cache uses a cached response, and
outlines a technique that origin servers can use to capture referral
information without "cache-busting."


This document is a product of the HyperText Transfer Protocol Working
Group of the IETF.

This is now a Proposed Standard Protocol.

This document specifies an Internet standards track protocol for
the Internet community, and requests discussion and suggestions
for improvements.  Please refer to the current edition of the
"Internet Official Protocol Standards" (STD 1) for the
standardization state and status of this protocol.  Distribution
of this memo is unlimited.

This announcement is sent to the IETF list and the RFC-DIST list.
Requests to be added to or deleted from the IETF distribution list
should be sent to IETF-REQUEST@IETF.ORG.  Requests to be
added to or deleted from the RFC-DIST distribution list should
be sent to RFC-DIST-REQUEST@ISI.EDU.

Details on obtaining RFCs via FTP or EMAIL may be obtained by sending
an EMAIL message to rfc-info@ISI.EDU with the message body 
help: ways_to_get_rfcs.  For example:

        To: rfc-info@ISI.EDU
        Subject: getting rfcs

        help: ways_to_get_rfcs

Requests for special distribution should be addressed to either the
author of the RFC in question, or to admin@DS.INTERNIC.NET.  Unless
specifically noted otherwise on the RFC itself, all RFCs are for
unlimited distribution.

Submissions for Requests for Comments should be sent to
RFC-EDITOR@ISI.EDU.  Please consult RFC 1543, Instructions to RFC
Authors, for further information.


Joyce K. Reynolds and Alegre Ramos
USC/Information Sciences Institute