1/*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 */
31
32#ifndef PingLoader_h
33#define PingLoader_h
34
35#include "ResourceHandleClient.h"
36#include "Timer.h"
37#include <wtf/Noncopyable.h>
38#include <wtf/RefPtr.h>
39
40namespace WebCore {
41
42class FormData;
43class Frame;
44class URL;
45class ResourceError;
46class ResourceHandle;
47class ResourceResponse;
48
49// This class triggers asynchronous loads independent of Frame staying alive (i.e., auditing pingbacks).
50// Since nothing depends on resources loaded through this class, we just want
51// to allow the load to live long enough to ensure the message was actually sent.
52// Therefore, as soon as a callback is received from the ResourceHandle, this class
53// will cancel the load and delete itself.
54class PingLoader : private ResourceHandleClient {
55    WTF_MAKE_NONCOPYABLE(PingLoader); WTF_MAKE_FAST_ALLOCATED;
56public:
57    static void loadImage(Frame&, const URL&);
58    static void sendPing(Frame&, const URL& pingURL, const URL& destinationURL);
59    static void sendViolationReport(Frame&, const URL& reportURL, PassRefPtr<FormData> report);
60
61    virtual ~PingLoader();
62
63private:
64    static void createPingLoader(Frame&, ResourceRequest&);
65    PingLoader(Frame&, ResourceRequest&);
66
67    virtual void didReceiveResponse(ResourceHandle*, const ResourceResponse&) override { delete this; }
68    virtual void didReceiveData(ResourceHandle*, const char*, unsigned, int) override { delete this; }
69    virtual void didFinishLoading(ResourceHandle*, double) override { delete this; }
70    virtual void didFail(ResourceHandle*, const ResourceError&) override { delete this; }
71    virtual bool shouldUseCredentialStorage(ResourceHandle*)  override { return m_shouldUseCredentialStorage; }
72    void timeoutTimerFired(Timer<PingLoader>&) { delete this; }
73
74    RefPtr<ResourceHandle> m_handle;
75    Timer<PingLoader> m_timeout;
76    bool m_shouldUseCredentialStorage;
77};
78
79}
80
81#endif
82