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Changeset 784 for draft-ietf-httpbis/latest/p6-cache.html
- Timestamp:
- Mar 10, 2010, 12:45:16 AM (10 years ago)
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draft-ietf-httpbis/latest/p6-cache.html (modified) (9 diffs)
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draft-ietf-httpbis/latest/p6-cache.html
r783 r784 854 854 </p> 855 855 <ul class="empty"> 856 <li>The term "age_value" denotes the value of the Age header, in a form appropriate for arithmetic operation; or 0, if not available.</li> 856 <li>The term "age_value" denotes the value of the Age header (<a href="#header.age" id="rfc.xref.header.age.2" title="Age">Section 3.1</a>), in a form appropriate for arithmetic operation; or 0, if not available. 857 </li> 857 858 </ul> 858 859 <p id="rfc.section.2.3.2.p.4"> <dfn>date_value</dfn> … … 860 861 <ul class="empty"> 861 862 <li>HTTP/1.1 requires origin servers to send a Date header, if possible, with every response, giving the time at which the response 862 was generated (see <a href="p1-messaging.html#header.date" title="Date">Section 9.3</a> of <a href="#Part1" id="rfc.xref.Part1.11"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>). The term "date_value" denotes the value of the Date header, in a form appropriate for arithmetic operations. See <a href="p1-messaging.html#clockless.origin.server.operation" title="Clockless Origin Server Operation">Section 9.3.1</a> of <a href="#Part1" id="rfc.xref.Part1.12"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for requirements regarding responses without a Date response header.<span class="comment" id="TODO-checkref">[<a href="#TODO-checkref" class="smpl">TODO-checkref</a>: correct reference? --jre]</span> 863 was generated. The term "date_value" denotes the value of the Date header, in a form appropriate for arithmetic operations. 864 See <a href="p1-messaging.html#header.date" title="Date">Section 9.3</a> of <a href="#Part1" id="rfc.xref.Part1.11"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a> for the definition of the Date header, and for requirements regarding responses without a Date response header. 863 865 </li> 864 866 </ul> … … 893 895 <div id="rfc.figure.u.5"></div><pre class="text"> corrected_initial_age = corrected_received_age 894 896 + (now - request_time) 895 </pre><p id="rfc.section.2.3.2.p.12">where "request_time" is the time (according to the local clock) when the request that elicited this response was sent.</p> 896 <p id="rfc.section.2.3.2.p.13">The current_age of a stored response can then be calculated by adding the amount of time (in seconds) since the stored response 897 </pre><p id="rfc.section.2.3.2.p.12">The current_age of a stored response can then be calculated by adding the amount of time (in seconds) since the stored response 897 898 was last validated by the origin server to the corrected_initial_age. 898 899 </p> … … 972 973 <ul> 973 974 <li>adding or removing whitespace, where allowed in the header's syntax</li> 974 <li>combining multiple message-header fields with the same field name (see <a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.1 3"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>)975 <li>combining multiple message-header fields with the same field name (see <a href="p1-messaging.html#header.fields" title="Header Fields">Section 3.2</a> of <a href="#Part1" id="rfc.xref.Part1.12"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>) 975 976 </li> 976 977 <li>normalizing both header values in a way that is known to have identical semantics, according to the header's specification … … 1247 1248 that time. 1248 1249 </p> 1249 <p id="rfc.section.3.3.p.3">The field-value is an absolute date and time as defined by HTTP-date in <a href="p1-messaging.html#date.time.formats.full.date" title="Date/Time Formats: Full Date">Section 6.1</a> of <a href="#Part1" id="rfc.xref.Part1.1 4"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>; it <em class="bcp14">MUST</em> be sent in rfc1123-date format.1250 <p id="rfc.section.3.3.p.3">The field-value is an absolute date and time as defined by HTTP-date in <a href="p1-messaging.html#date.time.formats.full.date" title="Date/Time Formats: Full Date">Section 6.1</a> of <a href="#Part1" id="rfc.xref.Part1.13"><cite title="HTTP/1.1, part 1: URIs, Connections, and Message Parsing">[Part1]</cite></a>; it <em class="bcp14">MUST</em> be sent in rfc1123-date format. 1250 1251 </p> 1251 1252 <div id="rfc.figure.u.13"></div><pre class="inline"><span id="rfc.iref.g.9"></span><span id="rfc.iref.g.10"></span> <a href="#header.expires" class="smpl">Expires</a> = "Expires" ":" <a href="#core.rules" class="smpl">OWS</a> <a href="#header.expires" class="smpl">Expires-v</a> … … 1427 1428 <td class="left">http</td> 1428 1429 <td class="left">standard</td> 1429 <td class="left"> <a href="#header.age" id="rfc.xref.header.age. 2" title="Age">Section 3.1</a>1430 <td class="left"> <a href="#header.age" id="rfc.xref.header.age.3" title="Age">Section 3.1</a> 1430 1431 </td> 1431 1432 </tr> … … 1783 1784 <li class="indline0"><a id="rfc.index.A" href="#rfc.index.A"><b>A</b></a><ul class="ind"> 1784 1785 <li class="indline1">age <a class="iref" href="#rfc.iref.a.1">1.2</a></li> 1785 <li class="indline1">Age header <a class="iref" href="#rfc.xref.header.age.1">2.2</a>, <a class="iref" href="#rfc. iref.a.2"><b>3.1</b></a>, <a class="iref" href="#rfc.xref.header.age.2">5.1</a></li>1786 <li class="indline1">Age header <a class="iref" href="#rfc.xref.header.age.1">2.2</a>, <a class="iref" href="#rfc.xref.header.age.2">2.3.2</a>, <a class="iref" href="#rfc.iref.a.2"><b>3.1</b></a>, <a class="iref" href="#rfc.xref.header.age.3">5.1</a></li> 1786 1787 </ul> 1787 1788 </li> … … 1852 1853 <li class="indline1">Headers 1853 1854 <ul class="ind"> 1854 <li class="indline1">Age <a class="iref" href="#rfc.xref.header.age.1">2.2</a>, <a class="iref" href="#rfc. iref.h.2"><b>3.1</b></a>, <a class="iref" href="#rfc.xref.header.age.2">5.1</a></li>1855 <li class="indline1">Age <a class="iref" href="#rfc.xref.header.age.1">2.2</a>, <a class="iref" href="#rfc.xref.header.age.2">2.3.2</a>, <a class="iref" href="#rfc.iref.h.2"><b>3.1</b></a>, <a class="iref" href="#rfc.xref.header.age.3">5.1</a></li> 1855 1856 <li class="indline1">Cache-Control <a class="iref" href="#rfc.xref.header.cache-control.1">2.1</a>, <a class="iref" href="#rfc.xref.header.cache-control.2">2.1</a>, <a class="iref" href="#rfc.xref.header.cache-control.3">2.2</a>, <a class="iref" href="#rfc.iref.h.3"><b>3.2</b></a>, <a class="iref" href="#rfc.xref.header.cache-control.4">5.1</a>, <a class="iref" href="#rfc.xref.header.cache-control.5">A.1</a>, <a class="iref" href="#rfc.xref.header.cache-control.6">A.1</a></li> 1856 1857 <li class="indline1">Expires <a class="iref" href="#rfc.xref.header.expires.1">2.1</a>, <a class="iref" href="#rfc.xref.header.expires.2">2.3</a>, <a class="iref" href="#rfc.xref.header.expires.3">2.3.1</a>, <a class="iref" href="#rfc.iref.h.4"><b>3.3</b></a>, <a class="iref" href="#rfc.xref.header.expires.4">5.1</a></li> … … 1913 1914 </li> 1914 1915 <li class="indline0"><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul class="ind"> 1915 <li class="indline1"><em>Part1</em> <a class="iref" href="#rfc.xref.Part1.1">1.4</a>, <a class="iref" href="#rfc.xref.Part1.2">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.3">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.4">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.5">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.6">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.7">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.8">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.9">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.10">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.11">2.3.2</a>, <a class="iref" href="#rfc.xref.Part1.12">2. 3.2</a>, <a class="iref" href="#rfc.xref.Part1.13">2.6</a>, <a class="iref" href="#rfc.xref.Part1.14">3.3</a>, <a class="iref" href="#Part1"><b>8.1</b></a><ul class="ind">1916 <li class="indline1"><em>Part1</em> <a class="iref" href="#rfc.xref.Part1.1">1.4</a>, <a class="iref" href="#rfc.xref.Part1.2">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.3">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.4">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.5">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.6">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.7">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.8">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.9">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.10">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.11">2.3.2</a>, <a class="iref" href="#rfc.xref.Part1.12">2.6</a>, <a class="iref" href="#rfc.xref.Part1.13">3.3</a>, <a class="iref" href="#Part1"><b>8.1</b></a><ul class="ind"> 1916 1917 <li class="indline1"><em>Section 1.2</em> <a class="iref" href="#rfc.xref.Part1.1">1.4</a></li> 1917 1918 <li class="indline1"><em>Section 1.2.2</em> <a class="iref" href="#rfc.xref.Part1.2">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.3">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.4">1.4.1</a>, <a class="iref" href="#rfc.xref.Part1.5">1.4.1</a></li> 1918 1919 <li class="indline1"><em>Section 2.6</em> <a class="iref" href="#rfc.xref.Part1.8">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.10">1.4.2</a></li> 1919 <li class="indline1"><em>Section 3.2</em> <a class="iref" href="#rfc.xref.Part1.6">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.1 3">2.6</a></li>1920 <li class="indline1"><em>Section 6.1</em> <a class="iref" href="#rfc.xref.Part1.7">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.1 4">3.3</a></li>1920 <li class="indline1"><em>Section 3.2</em> <a class="iref" href="#rfc.xref.Part1.6">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.12">2.6</a></li> 1921 <li class="indline1"><em>Section 6.1</em> <a class="iref" href="#rfc.xref.Part1.7">1.4.2</a>, <a class="iref" href="#rfc.xref.Part1.13">3.3</a></li> 1921 1922 <li class="indline1"><em>Section 9.3</em> <a class="iref" href="#rfc.xref.Part1.11">2.3.2</a></li> 1922 <li class="indline1"><em>Section 9.3.1</em> <a class="iref" href="#rfc.xref.Part1.12">2.3.2</a></li>1923 1923 <li class="indline1"><em>Section 9.9</em> <a class="iref" href="#rfc.xref.Part1.9">1.4.2</a></li> 1924 1924 </ul>
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