Re: [whatwg/fetch] HTTP cache partitioning (#943)

@annevk commented on this pull request.



> @@ -2050,6 +2050,34 @@ clearly stipulates that <a>connections</a> are keyed on
      WebSocket saner -->
 
 
+<h3 id=http-cache-partitions>HTTP cache partitions</h3>
+
+<p>To
+<dfn lt="determine the HTTP cache partition|determining the HTTP cache partition">determine the HTTP cache partition</dfn>,
+given <var>request</var>, run these steps:
+
+<ol>
+ <li><p>If <var>request</var> is a <a>navigation request</a>, set <var>environmentSettings</var> to
+ <var>request</var>'s <a for="environment">target browsing context</a>'s <a>active document</a>'s
+ <a>environment settings object</a>. Otherwise let <var>environmentSettings</var> be
+ <var>request</var>'s <a for=request>client</a>.

You need the request's reserved client before you can get to a target browsing context. Any reason not to use the creation URL's origin of the reserved client?

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