Changeset 771 for draft-ietf-httpbis/latest/p6-cache.xml

Timestamp:

Mar 5, 2010, 2:05:58 AM (10 years ago)

Author:

julian.reschke@…

Message:

clarify header normalization vs matching request headers (see #147)

File:

• draft-ietf-httpbis/latest/p6-cache.xml (modified) (2 diffs)

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

@@ -822 +822 @@
 </t>
 <t>
-  The selecting request-headers from two requests are defined to match if and only if the
-  selecting request-headers in the first request can be transformed to the selecting
-  request-headers in the second request by adding or removing linear white space
-  <cref anchor="TODO-missing-ref">[ref]</cref> at places where this is allowed by the corresponding ABNF, and/or
-  combining multiple message-header fields with the same field name following the rules
-  about header fields in &header-fields;.
-</t>
-<t>
-  If a header field is absent from a request, it can only match another request 
-  if it is also absent there.
+  The selecting request-headers from two requests are defined to match
+  if and only if those in the first request can be transformed to those in the
+  second request by applying any of the following:
+  <list style="symbols">
+    <t>
+      adding or removing whitespace, where allowed in the header's syntax
+    </t>
+    <t>
+      combining multiple message-header fields with the same field name (see
+      &header-fields;)
+    </t>
+    <t>
+      normalizing both header values in a way that is known to have identical
+      semantics, according to the header's specification (e.g., re-ordering field values
+      when order is not significant; case-normalization, where values are defined to be
+      case-insensitive)   
+    </t>
+  </list>
+</t>
+<t>
+  If (after any normalisation that may take place) a header field is absent
+  from a request, it can only match another request if it is also absent there.
 </t>
 <t>
@@ -2269 +2281 @@
   <list style="symbols"> 
     <t>
+      <eref target="http://tools.ietf.org/wg/httpbis/trac/ticket/147" />:
+      "serving negotiated responses from cache: header-specific canonicalization"
+    </t>
+    <t>
       <eref target="http://tools.ietf.org/wg/httpbis/trac/ticket/197" />:
       "Effect of CC directives on history lists"