I-D ACTION:draft-mogul-http-revalidate-01.txt
Internet-Drafts@ietf.org Thu, 29 May 1997 13:56 UTC
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Subject: I-D ACTION:draft-mogul-http-revalidate-01.txt
Date: Thu, 29 May 1997 09:43:37 -0400
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A Revised Internet-Draft is available from the on-line Internet-Drafts directories. Title : Forcing HTTP/1.1 proxies to revalidate responses Author(s) : J. Mogul Filename : draft-mogul-http-revalidate-01.txt Pages : 10 Date : 05/28/1997 The HTTP/1.1 specification [1] currently defines a ``proxy-revalidate'' Cache-control directive, which forces a proxy to revalidate a stale response before using it in a reply. There is no mechanism defined that forces a proxy, but not an end-client, to revalidate a fresh response. The lack of such a mechanism is due to an error in drafting RFC2068, and appears to create problems for use of the Authorization header, the Digest Access Authentication extension [2], the State Management Mechanism [3], and several other proposed extensions. This document discusses the problem and several possible solutions, and proposes to add a new ``s-maxage'' directive as the best available solution. Internet-Drafts are available by anonymous FTP. Login with the username "anonymous" and a password of your e-mail address. After logging in, type "cd internet-drafts" and then "get draft-mogul-http-revalidate-01.txt". A URL for the Internet-Draft is: ftp://ds.internic.net/internet-drafts/draft-mogul-http-revalidate-01.txt Internet-Drafts directories are located at: o Africa: ftp.is.co.za o Europe: ftp.nordu.net ftp.nis.garr.it o Pacific Rim: munnari.oz.au o US East Coast: ds.internic.net o US West Coast: ftp.isi.edu Internet-Drafts are also available by mail. Send a message to: mailserv@ds.internic.net. In the body type: "FILE /internet-drafts/draft-mogul-http-revalidate-01.txt". NOTE: The mail server at ds.internic.net can return the document in MIME-encoded form by using the "mpack" utility. To use this feature, insert the command "ENCODING mime" before the "FILE" command. To decode the response(s), you will need "munpack" or a MIME-compliant mail reader. Different MIME-compliant mail readers exhibit different behavior, especially when dealing with "multipart" MIME messages (i.e., documents which have been split up into multiple messages), so check your local documentation on how to manipulate these messages. Below is the data which will enable a MIME compliant mail reader implementation to automatically retrieve the ASCII version of the Internet-Draft.
- I-D ACTION:draft-mogul-http-revalidate-01.txt Internet-Drafts