Changeset 792 for draft-ietf-httpbis/latest/p6-cache.html

Timestamp:

17/03/10 10:11:28 (12 years ago)

Author:

julian.reschke@…

Message:

make age calculation a bit less conservative (related to #29)

File:

• draft-ietf-httpbis/latest/p6-cache.html (modified) (6 diffs)

draft-ietf-httpbis/latest/p6-cache.html

@@ -402 +402 @@
       <meta name="dct.creator" content="Reschke, J. F.">
       <meta name="dct.identifier" content="urn:ietf:id:draft-ietf-httpbis-p6-cache-latest">
-      <meta name="dct.issued" scheme="ISO8601" content="2010-03-10">
+      <meta name="dct.issued" scheme="ISO8601" content="2010-03-17">
       <meta name="dct.replaces" content="urn:ietf:rfc:2616">
       <meta name="dct.abstract" content="The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypermedia information systems. This document is Part 6 of the seven-part specification that defines the protocol referred to as &#34;HTTP/1.1&#34; and, taken together, obsoletes RFC 2616. Part 6 defines requirements on HTTP caches and the associated header fields that control cache behavior or indicate cacheable response messages.">
@@ -428 +428 @@
             </tr>
             <tr>
-               <td class="left">Expires: September 11, 2010</td>
+               <td class="left">Expires: September 18, 2010</td>
                <td class="right">J. Mogul</td>
             </tr>
@@ -489 +489 @@
             <tr>
                <td class="left"></td>
-               <td class="right">March 10, 2010</td>
+               <td class="right">March 17, 2010</td>
             </tr>
          </tbody>
@@ -519 +519 @@
       <p>The list of Internet-Draft Shadow Directories can be accessed at <a href="http://www.ietf.org/shadow.html">http://www.ietf.org/shadow.html</a>.
       </p>
-      <p>This Internet-Draft will expire in September 11, 2010.</p>
+      <p>This Internet-Draft will expire in September 18, 2010.</p>
       <h1><a id="rfc.copyrightnotice" href="#rfc.copyrightnotice">Copyright Notice</a></h1>
       <p>Copyright © 2010 IETF Trust and the persons identified as the document authors. All rights reserved.</p>
@@ -887 +887 @@
             clock. If the result is negative, the result is replaced by zero.
          </li>
-         <li>age_value, if all of the caches along the response path implement HTTP/1.1.</li>
+         <li>the "corrected_age_value", if all of the caches along the response path implement HTTP/1.1; note this value <em class="bcp14">MUST</em> be interpreted relative to the time the request was initiated, not the time that the response was received.
+         </li>
       </ol>
-      <div id="rfc.figure.u.4"></div> 
-      <p>These are combined as</p>  <pre class="text">  apparent_age = max(0, response_time - date_value);
-  corrected_received_age = max(apparent_age, age_value);
-</pre><p id="rfc.section.2.3.2.p.10">When an Age value is received, it <em class="bcp14">MUST</em> be interpreted relative to the time the request was initiated, not the time that the response was received.
-      </p>
-      <div id="rfc.figure.u.5"></div><pre class="text">  response_delay = response_time - request_time;
-  corrected_initial_age = corrected_received_age + response_delay;
-</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
+      <div id="rfc.figure.u.4"></div> <pre class="text">  apparent_age = max(0, response_time - date_value);
+
+  response_delay = response_time - request_time;
+  corrected_age_value = age_value + response_delay;  
+</pre> <div id="rfc.figure.u.5"></div> 
+      <p>These are combined as</p>  <pre class="text">  corrected_initial_age = max(apparent_age, corrected_age_value);
+</pre><p id="rfc.section.2.3.2.p.11">The current_age of a stored response can then be calculated by adding the amount of time (in seconds) since the stored response
          was last validated by the origin server to the corrected_initial_age.
       </p>
@@ -1772 +1772 @@
       </ul>
       <h2 id="rfc.section.C.11"><a href="#rfc.section.C.11">C.11</a>&nbsp;<a id="changes.since.09" href="#changes.since.09">Since draft-ietf-httpbis-p6-cache-09</a></h2>
-      <p id="rfc.section.C.11.p.1">No significant changes.</p>
+      <p id="rfc.section.C.11.p.1">Closed issues: </p>
+      <ul>
+         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/29">http://tools.ietf.org/wg/httpbis/trac/ticket/29</a>&gt;: "Age calculation"
+         </li>
+      </ul>
       <h1 id="rfc.index"><a href="#rfc.index">Index</a></h1>
       <p class="noprint"><a href="#rfc.index.A">A</a> <a href="#rfc.index.C">C</a> <a href="#rfc.index.E">E</a> <a href="#rfc.index.F">F</a> <a href="#rfc.index.G">G</a> <a href="#rfc.index.H">H</a> <a href="#rfc.index.M">M</a> <a href="#rfc.index.N">N</a> <a href="#rfc.index.O">O</a> <a href="#rfc.index.P">P</a> <a href="#rfc.index.R">R</a> <a href="#rfc.index.S">S</a> <a href="#rfc.index.V">V</a> <a href="#rfc.index.W">W</a>