Block execution of failed 'crossorigin' <script>s.

Source/core/dom/ScriptLoader.h

 /*
  * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 12 matching lines @@
 
 #include "core/fetch/ResourceClient.h"
 #include "core/fetch/ResourcePtr.h"
 #include "wtf/text/TextPosition.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class ScriptResource;
 class ContainerNode;
+class Document;
 class Element;
 class ScriptLoaderClient;
 class ScriptSourceCode;
 
 
 class ScriptLoader : private ResourceClient {
 public:
     static PassOwnPtr<ScriptLoader> create(Element*, bool createdByParser, bool isEvaluated);
     virtual ~ScriptLoader();
 
     Element* element() const { return m_element; }
 
     enum LegacyTypeSupport { DisallowLegacyTypeInTypeAttribute, AllowLegacyTypeInTypeAttribute };
     bool prepareScript(const TextPosition& scriptStartPosition = TextPosition::minimumPosition(), LegacyTypeSupport = DisallowLegacyTypeInTypeAttribute);
 
     String scriptCharset() const { return m_characterEncoding; }
     String scriptContent() const;
     void executeScript(const ScriptSourceCode&);
     void execute(ScriptResource*);
 
+    // Check if potentially cross-origin enabled script is accessible
+    // prior to execution. Returns 'false' if not accessible, signalling
+    // that callers must not dispatch load events as the cross-origin
+    // fetch failed.
+    bool executePotentiallyCrossOriginScript(const ScriptSourceCode&);
+
     // XML parser calls these
     void dispatchLoadEvent();
     void dispatchErrorEvent();
     bool isScriptTypeSupported(LegacyTypeSupport) const;
 
     bool haveFiredLoadEvent() const { return m_haveFiredLoad; }
     bool willBeParserExecuted() const { return m_willBeParserExecuted; }
     bool readyToBeParserExecuted() const { return m_readyToBeParserExecuted; }
     bool willExecuteWhenDocumentFinishedParsing() const { return m_willExecuteWhenDocumentFinishedParsing; }
     ResourcePtr<ScriptResource> resource() { return m_resource; }
 
     void setHaveFiredLoadEvent(bool haveFiredLoad) { m_haveFiredLoad = haveFiredLoad; }
     bool isParserInserted() const { return m_parserInserted; }
     bool alreadyStarted() const { return m_alreadyStarted; }
     bool forceAsync() const { return m_forceAsync; }
 
     // Helper functions used by our parent classes.
     void didNotifySubtreeInsertionsToDocument();
     void childrenChanged();
     void handleSourceAttribute(const String& sourceUrl);
     void handleAsyncAttribute();
 
+    static void reportCrossOriginFailure(Document*, const KURL& originUrl, const String& errorDescription);
+
 private:
     ScriptLoader(Element*, bool createdByParser, bool isEvaluated);
 
     bool ignoresLoadRequest() const;
     bool isScriptForEventSupported() const;
 
     bool fetchScript(const String& sourceUrl);
     void stopLoadRequest();
 
     ScriptLoaderClient* client() const;
@@ skipping 21 matching lines @@
 
 inline PassOwnPtr<ScriptLoader> ScriptLoader::create(Element* element, bool createdByParser, bool isEvaluated)
 {
     return adoptPtr(new ScriptLoader(element, createdByParser, isEvaluated));
 }
 
 }
 
 
 #endif