refactor: small improvements

lib/fetch/util.js

@@ -335,7 +335,8 @@ function determineRequestsReferrer (request) {
     // referrerSource be requests's referrer.
     referrerSource = request.referrer
   } else {
-    // If referrerSource is null, then return "no-referrer".
+    // If referrerSource neither client nor instance of URL
+    // then return "no-referrer".
     return 'no-referrer'
   }
 
@@ -359,7 +360,7 @@ function determineRequestsReferrer (request) {
   // source for use as referrer (using util function, with originOnly true)
   // 6. If result of seralizing referrerUrl is a string whose length is greater than
   // 4096, then set referrerURL to referrerOrigin
-    ? referrerOrigin = stripURLForReferrer(referrerSource, true)
+    ? (referrerOrigin = stripURLForReferrer(referrerSource, true))
     : temp
   const areSameOrigin = sameOrigin(request, referrerUrl)
   const isNonPotentiallyTrustWorthy = isURLPotentiallyTrustworthy(referrerUrl) &&
@@ -368,37 +369,38 @@ function determineRequestsReferrer (request) {
   // NOTE: How to treat step 7?
   // 8. Execute the switch statements corresponding to the value of policy:
   switch (policy) {
-    case 'origin': return referrerOrigin
+    case 'origin': return referrerOrigin ?? stripURLForReferrer(referrerSource, true)
     case 'unsafe-url': return referrerUrl
-    case 'strict-origin':
-      /**
-       * 1. If referrerURL is a potentially trustworthy URL and
-       * request’s current URL is not a potentially trustworthy URL,
-       * then return no referrer.
-       * 2. Return referrerOrigin
-       */
-      return isNonPotentiallyTrustWorthy ? 'no-referrer' : referrerOrigin
-    case 'strict-origin-when-cross-origin':
-      /**
-       * 1. If the origin of referrerURL and the origin of request’s current URL are the same,
-       * then return referrerURL.
-       * 2. If referrerURL is a potentially trustworthy URL and request’s current URL is not a
-       * potentially trustworthy URL, then return no referrer.
-       * 3. Return referrerOrigin
-      */
-      if (areSameOrigin) return referrerOrigin
-      else return isNonPotentiallyTrustWorthy ? 'no-referrer' : referrerOrigin
     case 'same-origin':
       return areSameOrigin ? referrerOrigin : 'no-referrer'
     case 'origin-when-cross-origin':
       return areSameOrigin ? referrerUrl : referrerOrigin
-    case 'no-referrer-when-downgrade':
+    case 'strict-origin-when-cross-origin':
+      /**
+         * 1. If the origin of referrerURL and the origin of request’s current URL are the same,
+         * then return referrerURL.
+         * 2. If referrerURL is a potentially trustworthy URL and request’s current URL is not a
+         * potentially trustworthy URL, then return no referrer.
+         * 3. Return referrerOrigin
+      */
+      if (areSameOrigin) return referrerOrigin
+      // else return isNonPotentiallyTrustWorthy ? 'no-referrer' : referrerOrigin
+    case 'strict-origin': // eslint-disable-line
+      /**
+         * 1. If referrerURL is a potentially trustworthy URL and
+         * request’s current URL is not a potentially trustworthy URL,
+         * then return no referrer.
+         * 2. Return referrerOrigin
+        */
+    case 'no-referrer-when-downgrade': // eslint-disable-line
       /**
        * 1. If referrerURL is a potentially trustworthy URL and
        * request’s current URL is not a potentially trustworthy URL,
        * then return no referrer.
        * 2. Return referrerOrigin
       */
+
+    default: // eslint-disable-line
       return isNonPotentiallyTrustWorthy ? 'no-referrer' : referrerOrigin
   }
 
@@ -408,12 +410,7 @@ function determineRequestsReferrer (request) {
     urlObject.password = ''
     urlObject.hash = ''
 
-    if (originOnly) {
-      urlObject.pathname = ''
-      urlObject.search = ''
-    }
-
-    return urlObject.href
+    return originOnly ? urlObject.origin : urlObject.href
   }
 }