HTTP Working GroupP. McManus
Intended status: Standards TrackDecember 14, 2017
Expires: June 17, 2018

free dating site seniors HTTP Immutable Responses


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free dating site singles The immutable HTTP response Cache-Control extension allows servers to identify resources that will not be updated during their freshness lifetime. This ensures that a client never needs to revalidate a cached fresh resource to be certain it has not been dating website japan

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free dating site south africa Discussion of this draft takes place on the HTTP working group mailing list ([email protected]), which is archived at jamaican dating site dating site japan

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black christian singles dating Copyright © 2017 IETF Trust and the persons identified as the document authors. All rights dating website london

free south american dating site This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (free dating site list) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.freenet singles preise

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free dating site edmonton HTTP’s freshness lifetime mechanism [RFC7234] allows a client to safely reuse a stored response to satisfy future requests for a specified period of time. However, it is still possible that the resource will be modified during that period.freenet singles kündigungsfrist

free dating site egypt For instance, a front-page newspaper photo with a freshness lifetime of one hour would mean that no user would see a cached photo more than one hour old. However, the photo could be updated at any time, resulting in different users seeing different photos depending on the contents of their caches for up to one hour. This is compliant with the caching mechanism defined in [RFC7234].freenet singles kosten

free dating site europe Users that need to confirm there have been no updates to their cached responses typically use the reload (or refresh) mechanism in their user agents. This in turn generates a conditional request [RFC7232], and either a new representation or, if unmodified, a 304 (Not Modified) response [RFC7232] is returned. A user agent that understands HTML and fetches its dependent sub-resources might issue hundreds of conditional requests to refresh all portions of a common page [REQPERPAGE].freenet singles kontakt

free dating site email search However, some content providers never create more than one variant of a sub-resource, because they use “versioned” URLs. When these resources need an update, they are simply published under a new URL, typically embedding an identifier unique to that version of the resource in the path, and references to the sub-resource are updated with the new path information.partnersuche lübeck xxl

free dating site edinburgh For example, free dating social site might be updated and republished as free dating site single parents, with any links that reference it being changed at the same time. This design pattern allows a very large freshness lifetime to be used for the sub-resource without guessing when it will be updated in the future.partnersuche lübeck qis

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free dating site evow The immutable HTTP response Cache-Control extension allows servers to identify responses that will not be updated during their freshness and white online dating

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free dating site essex The key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “NOT RECOMMENDED”, “MAY”, and “OPTIONAL” in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown dating site in canada

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freenet singles börse When present in an HTTP response, the immutable Cache-Control extension indicates that the origin server will not update the representation of that resource during the freshness lifetime of the dating site belgie

freenet singles bewertung Clients SHOULD NOT issue a conditional request during the response’s freshness lifetime (e.g., upon a reload) unless explicitly overridden by the user (e.g., a force reload).free dating site brazil

singlebörse bei freenet The immutable extension only applies during the freshness lifetime of the stored response. Stale responses SHOULD be revalidated as they normally would be in the absence of the immutable dating site badoo

lycamobile kostenlos registrieren The immutable extension takes no arguments. If any arguments are present, they have no meaning and MUST be ignored. Multiple instances of the immutable extension are equivalent to one instance. The presence of an immutable Cache-Control extension in a request has no dating site berlin

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msn registrieren kostenlos live An immutable response has the same semantic meaning when received by proxy clients as it does when received by user-agent-based clients. Therefore, proxies SHOULD skip conditionally revalidating fresh responses containing the immutable extension unless there is a signal from the client that a validation is necessary (e.g., a no-cache Cache-Control request directive defined in free dating military singles of [RFC7234]).kostenlos ohne anmeldung minecraft spielen

lovoo kostenlos registrieren A proxy that uses the immutable extension to bypass a conditional revalidation can choose whether to reply with a 304 or 200 response to its requesting client based on the request headers the proxy gay dating app london

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Cache-Control: max-age=31536000, immutable

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lol kostenlos registrieren The immutable mechanism acts as form of soft pinning and, as with all pinning mechanisms, creates a vector for amplification of cache corruption incidents. These incidents include cache-poisoning attacks. Three mechanisms are suggested for mitigation of this risk:dating sites reviews australia

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freenet singles kündigen vorlage The immutable extension has been registered in the “Hypertext Transfer Protocol (HTTP) Cache Directive Registry” per the guidelines described in new zealand online dating websites of [RFC7234].new zealand online dating sites

europe free dating site References

europe best free dating sites Normative References

Bradner, S., “free europe dating site 2010”, BCP 14, RFC 2119, europe 100 free dating site, March 1997, <free europe dating site 2015>.
Fielding, R., Ed. and J. Reschke, Ed., “single tours south america”, RFC 7232, single traveller tours south america, June 2014, <singles holiday south america>.
Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke, Ed., “friendscout24 kostenlos testen”, RFC 7234, whatsapp kostenlos anmelden pc, June 2014, <whatsapp registrierung kostenlos>.
Leiba, B., “netflix kostenlos anmelden”, BCP 14, RFC 8174, free dating website plenty of fish, May 2017, <free dating website perth>.

free dating site portugal Informative References

HTTP Archive, “free dating site pof”, <free dating site plenty of fish>.

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freenet singles gutscheincode Thank you to Ben Maurer for partnership in developing and testing this idea. Thank you to Amos Jeffries for help with proxy interactions and to Mark Nottingham for help with the documentation.freenet singlebörse yasni

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