Bug 1416307 - Set triggeringPrincipal to current document's principal, if aPrincipal is not given. r=bz, a=ritu

MozReview-Commit-ID: 8lxKFeUlyzq

--HG--
extra : rebase_source : 5f364f5cf84c12717bee021d752aa0f9ba4619dd
extra : intermediate-source : 9df27a7142ffb065fb56c3fc873298988deacb98
extra : source : 9fcf48189000ab8ee16f236be57c9659c7243b42

docshell/base/nsDocShell.cpp

@@ -6806,9 +6806,17 @@ nsDocShell::ForceRefreshURI(nsIURI* aURI, int32_t aDelay, bool aMetaRefresh, nsI
    */
   loadInfo->SetReferrer(mCurrentURI);
 
-  /* Don't ever "guess" on which principal to use to avoid picking
+  // Set the triggering pricipal to aPrincipal if available, or current
-   * the current principal.
+  // document's principal otherwise.
-   */
+  nsCOMPtr<nsIPrincipal> principal = aPrincipal;
+  if (!principal) {
+    nsCOMPtr<nsIDocument> doc = GetDocument();
+    if (!doc) {
+      return NS_ERROR_FAILURE;
+    }
+    principal = doc->NodePrincipal();
+  }
+  loadInfo->SetTriggeringPrincipal(principal);
   loadInfo->SetPrincipalIsExplicit(true);
 
   /* Check if this META refresh causes a redirection
@@ -6836,13 +6844,6 @@ nsDocShell::ForceRefreshURI(nsIURI* aURI, int32_t aDelay, bool aMetaRefresh, nsI
     loadInfo->SetLoadType(nsIDocShellLoadInfo::loadRefresh);
   }
 
-  // If the principal is null, the refresh will have a triggeringPrincipal
-  // derived from the referrer URI, or will be set to the system principal
-  // if there is no refererrer. See LoadURI()
-  if (aPrincipal) {
-    loadInfo->SetTriggeringPrincipal(aPrincipal);
-  }
-
   /*
    * LoadURI(...) will cancel all refresh timers... This causes the
    * Timer and its refreshData instance to be released...

docshell/base/nsIRefreshURI.idl

@@ -19,9 +19,8 @@ interface nsIRefreshURI : nsISupports {
       *
       * @param aUri The uri to refresh.
       * @param aPrincipal The triggeringPrincipal for the refresh load
-      *   May be null, in which case a principal will be built based on the
+      *   May be null, in which case the principal of current document will be
-      *   referrer URI of the previous docshell load, or will use the system
+      *   applied.
-      *   principal when there is no referrer.
       * @param aMillis The number of milliseconds to wait.
       * @param aRepeat Flag to indicate if the uri is to be 
       *                repeatedly refreshed every aMillis milliseconds.
@@ -37,9 +36,8 @@ interface nsIRefreshURI : nsISupports {
       *
       * @param aURI The URI to refresh.
       * @param aPrincipal The triggeringPrincipal for the refresh load
-      *   May be null, in which case a principal will be built based on the
+      *   May be null, in which case the principal of current document will be
-      *   referrer URI of the previous docshell load, or will use the system
+      *   applied.
-      *   principal when there is no referrer.
       * @param aMillis The number of milliseconds by which this refresh would
       *                be delayed if it were not being forced.
       * @param aMetaRefresh Flag to indicate if this is a meta refresh.
@@ -70,9 +68,8 @@ interface nsIRefreshURI : nsISupports {
       *
       * @param aBaseURI base URI to resolve refresh uri with.
       * @param aPrincipal The triggeringPrincipal for the refresh load
-      *   May be null, in which case a principal will be built based on the
+      *   May be null, in which case the principal of current document will be
-      *   referrer URI of the previous docshell load, or will use the system
+      *   applied.
-      *   principal when there is no referrer.
       * @param aHeader  The meta refresh header string.
       */
     void setupRefreshURIFromHeader(in nsIURI aBaseURI,