HTTP Working GroupP. McManus
Internet-DraftMozilla
Intended status: Standards TrackApril 30, 2017
Expires: November 1, 2017

hochbegabte frauen partnersuche HTTP Immutable Responses

draft-ietf-httpbis-immutable-02

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partnersuche ulm kostenlos runterladen The immutable HTTP response Cache-Control extension allows servers to identify resources that will not be updated during their freshness lifetime. This assures that a client never needs to revalidate a cached fresh resource to be certain it has not been modified.partnervermittlung odessa oktober

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gratis singlebörse deutschland legal Discussion of this draft takes place on the HTTP working group mailing list ([email protected]), which is archived at partnersuche linz land veranstaltungen.partnersuche linz land verkehrsabteilung

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partnersuche linz land gewerbe 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.online dating wann erstes date

partnersuche linz land immobilien 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].online chat nach date fragen

zwei männer suchen eine frau 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].partnersuche frauen israel

frauen suchen erfahrene männer 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.indische frauen partnersuche

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erfolgreiche männer suchen frauen Unfortunately, the user agent does not know when this versioned URL design pattern is used. As a result, user-driven refreshes still translate into wasted conditional requests for each sub-resource as each will return 304 responses.intelligente frauen partnersuche

männer suchen eine frau wie ihre mutter The tunesische männer suchen deutsche frauen immutable HTTP response Cache-Control extension allows servers to identify responses that will not be updated during their freshness lifetimes.indien frauen partnersuche

männer suchen eine frau This effectively informs clients that any conditional request for that response can be safely skipped without worrying that it has been updated.singles in meiner nähe kostenlos


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reiche männer suchen eine frau When present in an HTTP response, the partnersuche thailändische frauen immutable Cache-Control extension indicates that the origin server will not update the representation of that resource during the freshness lifetime of the response.free dating site in african

frauen suchen männer für eine nacht 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 sites in arab

2 männer suchen eine frau 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 immutable.free dating sites in america

frauen suchen männer essen 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 effect.partnersuche ulm kostenlos online

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singles in der nähe xanten 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).partnersuche dunkelhäutige frauen

partnersuche linz land telefonnummer A proxy that uses immutable to bypass a conditional revalidation may choose whether to reply with a 304 or 200 to its requesting client based on the request headers the proxy received.partnersuche frauen deutschland

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Cache-Control: max-age=31536000, immutable

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partnersuche linz land teilzeit 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:free dating sites in english


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partnersuche rumänische frauen [RFC7234] sections 7.1 and 7.1.2 require registration of the immutable extension in the “Hypertext Transfer Protocol (HTTP) Cache Directive Registry” with IETF Review.free dating sites in egypt


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partnersuche frauen aus russland 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.partnersuche spanische frauen


partnersuche schweden frauen References

starke frauen partnersuche Normative References

[RFC7231]
Fielding, R., Ed. and J. Reschke, Ed., “partnersuche südtirol frauen”, RFC 7231, partnersuche frauen suchen frauen, June 2014, <frauen suchen männer luzern>.
[RFC7232]
Fielding, R., Ed. and J. Reschke, Ed., “frauen suchen männer linz”, RFC 7232, frauen suchen männer in lübeck, June 2014, <frauen suchen männer leipzig>.
[RFC7234]
Fielding, R., Ed., Nottingham, M., Ed., and J. Reschke, Ed., “frauen suchen männer in lüneburg”, RFC 7234, chinesische frauen partnersuche, June 2014, <frauen aus china partnersuche>.

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partnersuche frauen aus rumänien Patrick McManus
Mozilla
EMail: deutsche männer suchen tschechische frauen