Changeset 2235 for draft-ietf-httpbis/latest/p6-cache.xml
- Timestamp:
- 07/05/13 06:17:49 (10 years ago)
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- 1 edited
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draft-ietf-httpbis/latest/p6-cache.xml
r2234 r2235 579 579 </t> 580 580 <t> 581 When calculating freshness, to avoid common problems in date parsing: 582 </t> 583 <t> 584 <list style="symbols"> 585 <t>Although all date formats are specified to be case-sensitive, 586 cache recipients &SHOULD; match day, week and timezone names 587 case-insensitively.</t> 588 589 <t>If a cache recipient's internal implementation of time has less 590 resolution than the value of an HTTP-date, the recipient &MUST; 591 internally represent a parsed <x:ref>Expires</x:ref> date as the 592 nearest time equal to or earlier than the received value.</t> 593 594 <t>Cache recipients &MUST-NOT; allow local time zones to influence the 595 calculation or comparison of an age or expiration time.</t> 596 597 <t>Cache recipients &SHOULD; consider a date with a zone abbreviation 598 other than "GMT" to be invalid for calculating expiration.</t> 599 </list> 600 </t> 601 <t> 581 602 Note that freshness applies only to cache operation; it cannot be used to 582 603 force a user agent to refresh its display or reload a resource. See <xref … … 761 782 current_age = corrected_initial_age + resident_time; 762 783 </artwork></figure> 763 <t>764 Additionally, to avoid common problems in date parsing:765 </t>766 <t>767 <list style="symbols">768 <t>Although all date formats are specified to be case-sensitive,769 cache recipients &SHOULD; match day, week and timezone names770 case-insensitively.</t>771 772 <t>If a cache recipient's internal implementation of time has less773 resolution than the value of an HTTP-date, the recipient &MUST;774 internally represent a parsed <x:ref>Expires</x:ref> date as the775 nearest time equal to or earlier than the received value.</t>776 777 <t>Cache recipients &MUST-NOT; allow local time zones to influence the778 calculation or comparison of an age or expiration time.</t>779 780 <t>Cache recipients &SHOULD; consider a date with a zone abbreviation781 other than "GMT" to be invalid for calculating expiration.</t>782 </list>783 </t>784 784 </section> 785 785
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