Bug 1206961 - Use channel->AsyncOpen2() for imageLoader; Remove security checks from callsites (r=bz)

dom/security/nsContentSecurityManager.cpp

@@ -39,6 +39,44 @@ static bool SchemeIs(nsIURI* aURI, const char* aScheme)
   return NS_SUCCEEDED(baseURI->SchemeIs(aScheme, &isScheme)) && isScheme;
 }
 
+
+static bool IsImageLoadInEditorAppType(nsILoadInfo* aLoadInfo)
+{
+  // Editor apps get special treatment here, editors can load images
+  // from anywhere.  This allows editor to insert images from file://
+  // into documents that are being edited.
+  nsContentPolicyType type = aLoadInfo->InternalContentPolicyType();
+  if (type != nsIContentPolicy::TYPE_INTERNAL_IMAGE  &&
+      type != nsIContentPolicy::TYPE_INTERNAL_IMAGE_PRELOAD &&
+      type != nsIContentPolicy::TYPE_IMAGESET) {
+    return false;
+  }
+
+  uint32_t appType = nsIDocShell::APP_TYPE_UNKNOWN;
+  nsINode* node = aLoadInfo->LoadingNode();
+  if (!node) {
+    return false;
+  }
+  nsIDocument* doc = node->OwnerDoc();
+  if (!doc) {
+    return false;
+  }
+
+  nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = doc->GetDocShell();
+  if (!docShellTreeItem) {
+    return false;
+  }
+
+  nsCOMPtr<nsIDocShellTreeItem> root;
+  docShellTreeItem->GetRootTreeItem(getter_AddRefs(root));
+  nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(root));
+  if (!docShell || NS_FAILED(docShell->GetAppType(&appType))) {
+    appType = nsIDocShell::APP_TYPE_UNKNOWN;
+  }
+
+  return appType == nsIDocShell::APP_TYPE_EDITOR;
+}
+
 static nsresult
 DoCheckLoadURIChecks(nsIURI* aURI, nsILoadInfo* aLoadInfo)
 {
@@ -55,8 +93,11 @@ DoCheckLoadURIChecks(nsIURI* aURI, nsILoadInfo* aLoadInfo)
     flags |= nsIScriptSecurityManager::ALLOW_CHROME;
   }
 
+  bool isImageInEditorType = IsImageLoadInEditorAppType(aLoadInfo);
+
   // We don't have a loadingPrincipal for TYPE_DOCUMENT
-  if (aLoadInfo->GetExternalContentPolicyType() != nsIContentPolicy::TYPE_DOCUMENT) {
+  if (aLoadInfo->GetExternalContentPolicyType() != nsIContentPolicy::TYPE_DOCUMENT &&
+      !isImageInEditorType) {
     rv = nsContentUtils::GetSecurityManager()->
       CheckLoadURIWithPrincipal(loadingPrincipal,
                                 aURI,
@@ -67,7 +108,7 @@ DoCheckLoadURIChecks(nsIURI* aURI, nsILoadInfo* aLoadInfo)
   // If the loadingPrincipal and the triggeringPrincipal are different, then make
   // sure the triggeringPrincipal is allowed to access that URI.
   nsCOMPtr<nsIPrincipal> triggeringPrincipal = aLoadInfo->TriggeringPrincipal();
-  if (loadingPrincipal != triggeringPrincipal) {
+  if (loadingPrincipal != triggeringPrincipal && !isImageInEditorType) {
     rv = nsContentUtils::GetSecurityManager()->
            CheckLoadURIWithPrincipal(triggeringPrincipal,
                                      aURI,
@@ -155,7 +196,8 @@ DoContentSecurityChecks(nsIURI* aURI, nsILoadInfo* aLoadInfo)
     }
 
     case nsIContentPolicy::TYPE_IMAGE: {
-      MOZ_ASSERT(false, "contentPolicyType not supported yet");
+      mimeTypeGuess = EmptyCString();
+      requestingContext = aLoadInfo->LoadingNode();
       break;
     }
 
@@ -295,7 +337,8 @@ DoContentSecurityChecks(nsIURI* aURI, nsILoadInfo* aLoadInfo)
     }
 
     case nsIContentPolicy::TYPE_IMAGESET: {
-      MOZ_ASSERT(false, "contentPolicyType not supported yet");
+      mimeTypeGuess = EmptyCString();
+      requestingContext = aLoadInfo->LoadingNode();
       break;
     }
 

dom/xbl/nsXBLResourceLoader.cpp

@@ -113,11 +113,6 @@ nsXBLResourceLoader::LoadResources(bool* aResult)
       continue;
 
     if (curr->mType == nsGkAtoms::image) {
-      if (!nsContentUtils::CanLoadImage(url, doc, doc, docPrincipal)) {
-        // We're not permitted to load this image, move on...
-        continue;
-      }
-
       // Now kick off the image load...
       // Passing nullptr for pretty much everything -- cause we don't care!
       // XXX: initialDocumentURI is nullptr! 

layout/style/ImageLoader.cpp

@@ -257,26 +257,21 @@ ImageLoader::LoadImage(nsIURI* aURI, nsIPrincipal* aOriginPrincipal,
     return;
   }
 
-  if (!nsContentUtils::CanLoadImage(aURI, mDocument, mDocument,
-                                    aOriginPrincipal)) {
-    return;
-  }
-
   RefPtr<imgRequestProxy> request;
-  nsContentUtils::LoadImage(aURI, mDocument, mDocument,
-                            aOriginPrincipal, aReferrer,
-                            mDocument->GetReferrerPolicy(),
-                            nullptr, nsIRequest::LOAD_NORMAL,
-                            NS_LITERAL_STRING("css"),
-                            getter_AddRefs(request));
+  nsresult rv = nsContentUtils::LoadImage(aURI, mDocument, mDocument,
+                                          aOriginPrincipal, aReferrer,
+                                          mDocument->GetReferrerPolicy(),
+                                          nullptr, nsIRequest::LOAD_NORMAL,
+                                          NS_LITERAL_STRING("css"),
+                                          getter_AddRefs(request));
 
-  if (!request) {
+  if (NS_FAILED(rv) || !request) {
     return;
   }
 
   RefPtr<imgRequestProxy> clonedRequest;
   mInClone = true;
-  nsresult rv = request->Clone(this, getter_AddRefs(clonedRequest));
+  rv = request->Clone(this, getter_AddRefs(clonedRequest));
   mInClone = false;
 
   if (NS_FAILED(rv)) {

layout/xul/nsImageBoxFrame.cpp

@@ -233,15 +233,13 @@ nsImageBoxFrame::UpdateImage()
                                               src,
                                               doc,
                                               baseURI);
+    if (uri) {
+      nsresult rv = nsContentUtils::LoadImage(uri, mContent, doc, mContent->NodePrincipal(),
+                                              doc->GetDocumentURI(), doc->GetReferrerPolicy(),
+                                              mListener, mLoadFlags,
+                                              EmptyString(), getter_AddRefs(mImageRequest));
 
-    if (uri && nsContentUtils::CanLoadImage(uri, mContent, doc,
-                                            mContent->NodePrincipal())) {
-      nsContentUtils::LoadImage(uri, mContent, doc, mContent->NodePrincipal(),
-                                doc->GetDocumentURI(), doc->GetReferrerPolicy(),
-                                mListener, mLoadFlags,
-                                EmptyString(), getter_AddRefs(mImageRequest));
-
-      if (mImageRequest) {
+      if (NS_SUCCEEDED(rv) && mImageRequest) {
         nsLayoutUtils::RegisterImageRequestIfAnimated(presContext,
                                                       mImageRequest,
                                                       &mRequestRegistered);

layout/xul/tree/nsTreeBodyFrame.cpp

@@ -2188,21 +2188,17 @@ nsTreeBodyFrame::GetImage(int32_t aRowIndex, nsTreeColumn* aCol, bool aUseContex
 
       // XXXbz what's the origin principal for this stuff that comes from our
       // view?  I guess we should assume that it's the node's principal...
-      if (nsContentUtils::CanLoadImage(srcURI, mContent, doc,
-                                       mContent->NodePrincipal())) {
-        nsresult rv = nsContentUtils::LoadImage(srcURI,
-                                                mContent,
-                                                doc,
-                                                mContent->NodePrincipal(),
-                                                doc->GetDocumentURI(),
-                                                doc->GetReferrerPolicy(),
-                                                imgNotificationObserver,
-                                                nsIRequest::LOAD_NORMAL,
-                                                EmptyString(),
-                                                getter_AddRefs(imageRequest));
-        NS_ENSURE_SUCCESS(rv, rv);
-                                  
-      }
+      nsresult rv = nsContentUtils::LoadImage(srcURI,
+                                              mContent,
+                                              doc,
+                                              mContent->NodePrincipal(),
+                                              doc->GetDocumentURI(),
+                                              doc->GetReferrerPolicy(),
+                                              imgNotificationObserver,
+                                              nsIRequest::LOAD_NORMAL,
+                                              EmptyString(),
+                                              getter_AddRefs(imageRequest));
+      NS_ENSURE_SUCCESS(rv, rv);
     }
     listener->UnsuppressInvalidation();