Implement navigator.sendBeacon()

Source/core/loader/SimplexLoader.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SimplexLoader_h
+#define SimplexLoader_h
+
+#include "core/fetch/ResourceLoaderOptions.h"
+#include "core/page/PageLifecycleObserver.h"
+#include "platform/Timer.h"
+#include "public/platform/WebURLLoaderClient.h"
+#include "wtf/Noncopyable.h"
+#include "wtf/RefPtr.h"
+
+namespace WebCore {
+
+class FormData;
+class LocalFrame;
+class KURL;
+class ResourceError;
+class ResourceHandle;
+class ResourceRequest;
+class ResourceResponse;
+
+// Issue an asynchronous, one-directional request at some resources, ignoring
+// any response. The request is made independent of any LocalFrame staying alive,
+// and must only stay alive until the transmission has completed successfully
+// (or not -- errors are not propagated back either.) Upon transmission, the
+// the load is cancelled and the loader cancels itself.
+//
+// The simplex loader is used by both 'ping' and 'beacon' loaders to perform
+// their requests.
+//
+class SimplexLoader : public PageLifecycleObserver, private blink::WebURLLoaderClient {
+    WTF_MAKE_NONCOPYABLE(SimplexLoader);
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    virtual ~SimplexLoader();
+
+protected:
+    SimplexLoader(LocalFrame*, ResourceRequest&, const FetchInitiatorInfo&, StoredCredentials);
+
+    static void start(LocalFrame*, ResourceRequest&, const FetchInitiatorInfo&, StoredCredentials = AllowStoredCredentials);
+
+private:
+    virtual void didReceiveResponse(blink::WebURLLoader*, const blink::WebURLResponse&) OVERRIDE;
+    virtual void didReceiveData(blink::WebURLLoader*, const char*, int, int) OVERRIDE;
+    virtual void didFinishLoading(blink::WebURLLoader*, double, int64_t) OVERRIDE;
+    virtual void didFail(blink::WebURLLoader*, const blink::WebURLError&) OVERRIDE;
+
+    void timeout(Timer<SimplexLoader>*);
+
+    OwnPtr<blink::WebURLLoader> m_loader;
+    Timer<SimplexLoader> m_timeout;
+    String m_url;
+    unsigned long m_identifier;
+};
+
+}
+
+#endif // SimplexLoader_h