Bug 1504085 - P1 refactor ReferrerInfo for reuse referrer-policy algorithm r=tnguyen

Differential Revision: https://phabricator.services.mozilla.com/D34453

--HG--
extra : moz-landing-system : lando

dom/security/ReferrerInfo.cpp

@@ -208,13 +208,17 @@ bool ReferrerInfo::ShouldResponseInheritReferrerInfo(nsIChannel* aChannel) {
   return aboutSpec.EqualsLiteral("about:srcdoc");
 }
 
-nsresult ReferrerInfo::HandleSecureToInsecureReferral(nsIURI* aURI,
-                                                      bool& aAllowed) const {
+/* static */
+nsresult ReferrerInfo::HandleSecureToInsecureReferral(nsIURI* aOriginalURI,
+                                                      nsIURI* aURI,
+                                                      uint32_t aPolicy,
+                                                      bool& aAllowed) {
+  NS_ENSURE_ARG(aOriginalURI);
   NS_ENSURE_ARG(aURI);
 
   aAllowed = false;
   bool referrerIsHttpsScheme;
-  nsresult rv = mOriginalReferrer->SchemeIs("https", &referrerIsHttpsScheme);
+  nsresult rv = aOriginalURI->SchemeIs("https", &referrerIsHttpsScheme);
   if (NS_WARN_IF(NS_FAILED(rv))) {
     return rv;
   }
@@ -234,9 +238,9 @@ nsresult ReferrerInfo::HandleSecureToInsecureReferral(nsIURI* aURI,
   // policy is "unsafe-url", "origin", or "origin-when-cross-origin".
   // in other referrer policies, https->http is not allowed...
 
-  if (mPolicy != nsIHttpChannel::REFERRER_POLICY_UNSAFE_URL &&
-      mPolicy != nsIHttpChannel::REFERRER_POLICY_ORIGIN_WHEN_XORIGIN &&
-      mPolicy != nsIHttpChannel::REFERRER_POLICY_ORIGIN && !uriIsHttpsScheme) {
+  if (aPolicy != nsIHttpChannel::REFERRER_POLICY_UNSAFE_URL &&
+      aPolicy != nsIHttpChannel::REFERRER_POLICY_ORIGIN_WHEN_XORIGIN &&
+      aPolicy != nsIHttpChannel::REFERRER_POLICY_ORIGIN && !uriIsHttpsScheme) {
     return NS_OK;
   }
 
@@ -357,7 +361,8 @@ nsresult ReferrerInfo::HandleUserReferrerSendingPolicy(nsIHttpChannel* aChannel,
   return NS_OK;
 }
 
-bool ReferrerInfo::IsCrossOriginRequest(nsIHttpChannel* aChannel) const {
+/* static */
+bool ReferrerInfo::IsCrossOriginRequest(nsIHttpChannel* aChannel) {
   nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
 
   nsCOMPtr<nsIURI> triggeringURI;
@@ -789,7 +794,8 @@ nsresult ReferrerInfo::ComputeReferrer(nsIHttpChannel* aChannel) {
   }
 
   bool isSecureToInsecureAllowed = false;
-  rv = HandleSecureToInsecureReferral(uri, isSecureToInsecureAllowed);
+  rv = HandleSecureToInsecureReferral(mOriginalReferrer, uri, mPolicy,
+                                      isSecureToInsecureAllowed);
   if (NS_WARN_IF(NS_FAILED(rv))) {
     return rv;
   }

dom/security/ReferrerInfo.h

@@ -102,6 +102,21 @@ class ReferrerInfo : public nsIReferrerInfo {
    */
   static bool HideOnionReferrerSource();
 
+  /*
+   * Check whether referrer is allowed to send in secure to insecure scenario.
+   */
+  static nsresult HandleSecureToInsecureReferral(nsIURI* aOriginalURI,
+                                                 nsIURI* aURI, uint32_t aPolicy,
+                                                 bool& aAllowed);
+
+  /**
+   * Returns true if the given channel is cross-origin request
+   *
+   * Computing whether the request is cross-origin may be expensive, so please
+   * do that in cases where we're going to use this information later on.
+   */
+  static bool IsCrossOriginRequest(nsIHttpChannel* aChannel);
+
   /**
    * Return default referrer policy which is controlled by user
    * prefs:
@@ -180,19 +195,6 @@ class ReferrerInfo : public nsIReferrerInfo {
    */
   bool HasRelNoReferrer(nsINode* aNode) const;
 
-  /**
-   * Returns true if the given channel is cross-origin request
-   *
-   * Computing whether the request is cross-origin may be expensive, so please
-   * do that in cases where we're going to use this information later on.
-   */
-  bool IsCrossOriginRequest(nsIHttpChannel* aChannel) const;
-
-  /*
-   * Check whether referrer is allowed to send in secure to insecure scenario.
-   */
-  nsresult HandleSecureToInsecureReferral(nsIURI* aURI, bool& aAllowed) const;
-
   /*
    * Handle user controlled pref network.http.referer.XOriginPolicy
    */