/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
 * distribution.
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 */

#ifndef PingLoader_h
#define PingLoader_h

#include "core/fetch/ResourceLoaderOptions.h"
#include "platform/Timer.h"
#include "public/platform/WebURLLoaderClient.h"
#include "wtf/Noncopyable.h"
#include "wtf/RefPtr.h"

namespace WebCore {

class FormData;
class Frame;
class KURL;
class ResourceError;
class ResourceHandle;
class ResourceRequest;
class ResourceResponse;

// This class triggers asynchronous loads independent of Frame staying alive (i.e., auditing pingbacks).
// Since nothing depends on resources loaded through this class, we just want
// to allow the load to live long enough to ensure the message was actually sent.
// Therefore, as soon as a callback is received from the ResourceHandle, this class
// will cancel the load and delete itself.
class PingLoader : private WebKit::WebURLLoaderClient {
    WTF_MAKE_NONCOPYABLE(PingLoader); WTF_MAKE_FAST_ALLOCATED;
public:
    enum ViolationReportType {
        ContentSecurityPolicyViolationReport,
        XSSAuditorViolationReport
    };

    static void loadImage(Frame*, const KURL& url);
    static void sendPing(Frame*, const KURL& pingURL, const KURL& destinationURL);
    static void sendViolationReport(Frame*, const KURL& reportURL, PassRefPtr<FormData> report, ViolationReportType);

    virtual ~PingLoader();

private:
    PingLoader(Frame*, ResourceRequest&, StoredCredentials = AllowStoredCredentials);

    virtual void didReceiveResponse(WebKit::WebURLLoader*, const WebKit::WebURLResponse&) OVERRIDE { delete this; }
    virtual void didReceiveData(WebKit::WebURLLoader*, const char*, int, int) OVERRIDE { delete this; }
    virtual void didFinishLoading(WebKit::WebURLLoader*, double) OVERRIDE { delete this; }
    virtual void didFail(WebKit::WebURLLoader*, const WebKit::WebURLError&) OVERRIDE { delete this; }
    void timeout(Timer<PingLoader>*) { delete this; }

    OwnPtr<WebKit::WebURLLoader> m_loader;
    Timer<PingLoader> m_timeout;
};

}

#endif