preconnect

Author: noamr

fetch.bs

@@ -2909,6 +2909,37 @@ reused across <a>connections</a> whose <a for=connection>credentials</a> are fal
 <a>connections</a> whose <a for=connection>credentials</a> are true.
 </div>
 
+<div algorithm="preemmptively-obtain-a-connection">
+<p>To <dfn export>preemptively obtain a connection</dfn>, given an
+<a>environment settings object</a> <var>environment</var>, a <a for=/>URL</a> <var>url</var>, and a
+boolean <var>credentials</var>, run these steps:
+
+<ol>
+ <li><p>Let <var>key</var> be the result of <a for=/>determining the network partition key</a> given
+ <var>environment</var>.
+
+ <li><p><a>Check resource hint CSP</a> with <var>environment</var> and <var>url</var>. If that
+ returns <b>allowed</b>, <a>Obtain a connection</a> with <var>key</var>, <var>url</var> and
+ <var>credentials</var>.
+</ol>
+</div>
+
+<div algorithm="check-resource-hint-csp">
+<p>To <dfn export>Check resource hint CSP</dfn>, given an
+<a>environment settings object</a> <var>environment</var>, and a <a for=/>URL</a> <var>url</var>,
+run these steps:
+
+<ol>
+ <li><p>Let <var>request</var> be a <a for=/>request</a> whose <a for=request>URL</a> is
+ <var>url</var>, <a for=request>initiator</a> is "<code>prefetch</code>", and whose
+ <a for=request>client</a> is <var>environment</var>.
+
+ <li><p>Return the result of running <a>should request be blocked by Content Security Policy?</a>
+ given <var>request</var>.
+
+</ol>
+</div>
+
 <hr>
 
 <div algorithm>