lib: support more attributes for early hint link

PR-URL: #44874
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: anonrig

lib/internal/validators.js

@@ -441,7 +441,7 @@ function validateUnion(value, name, union) {
   }
 }
 
-const linkValueRegExp = /^(?:<[^>]*>;)\s*(?:rel=(")?[^;"]*\1;?)\s*(?:(?:as|anchor|title)=(")?[^;"]*\2)?$/;
+const linkValueRegExp = /^(?:<[^>]*>;)\s*(?:rel=(")?[^;"]*\1;?)\s*(?:(?:as|anchor|title|crossorigin|disabled|fetchpriority|rel|referrerpolicy)=(")?[^;"]*\2)?$/;
 
 /**
  * @param {any} value

test/parallel/test-validators.js

@@ -12,6 +12,7 @@ const {
   validateString,
   validateInt32,
   validateUint32,
+  validateLinkHeaderValue,
 } = require('internal/validators');
 const { MAX_SAFE_INTEGER, MIN_SAFE_INTEGER } = Number;
 const outOfRangeError = {
@@ -154,3 +155,15 @@ const invalidArgValueError = {
     code: 'ERR_INVALID_ARG_TYPE'
   }));
 }
+
+{
+  // validateLinkHeaderValue type validation.
+  [
+    ['</styles.css>; rel=preload; as=style', '</styles.css>; rel=preload; as=style'],
+    ['</styles.css>; rel=preload; title=hello', '</styles.css>; rel=preload; title=hello'],
+    ['</styles.css>; rel=preload; crossorigin=hello', '</styles.css>; rel=preload; crossorigin=hello'],
+    ['</styles.css>; rel=preload; disabled=true', '</styles.css>; rel=preload; disabled=true'],
+    ['</styles.css>; rel=preload; fetchpriority=high', '</styles.css>; rel=preload; fetchpriority=high'],
+    ['</styles.css>; rel=preload; referrerpolicy=origin', '</styles.css>; rel=preload; referrerpolicy=origin'],
+  ].forEach(([value, expected]) => assert.strictEqual(validateLinkHeaderValue(value), expected));
+}