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#include "config.h"
33#include "PingLoader.h"
34
35#include "FormData.h"
36#include "Frame.h"
37#include "FrameLoaderClient.h"
38#include "Page.h"
39#include "ProgressTracker.h"
40#include "ResourceHandle.h"
41#include "SecurityOrigin.h"
42#include <wtf/OwnPtr.h>
43#include <wtf/UnusedParam.h>
44#include <wtf/text/CString.h>
45
46namespace WebCore {
47
48void PingLoader::loadImage(Frame* frame, const KURL& url)
49{
50    if (!frame->document()->securityOrigin()->canDisplay(url)) {
51        FrameLoader::reportLocalLoadFailed(frame, url);
52        return;
53    }
54
55    ResourceRequest request(url);
56    request.setTargetType(ResourceRequest::TargetIsImage);
57    request.setHTTPHeaderField("Cache-Control", "max-age=0");
58    if (!SecurityOrigin::shouldHideReferrer(request.url(), frame->loader()->outgoingReferrer()))
59        request.setHTTPReferrer(frame->loader()->outgoingReferrer());
60    frame->loader()->addExtraFieldsToSubresourceRequest(request);
61    OwnPtr<PingLoader> pingLoader = adoptPtr(new PingLoader(frame, request));
62
63    // Leak the ping loader, since it will kill itself as soon as it receives a response.
64    PingLoader* leakedPingLoader = pingLoader.leakPtr();
65    UNUSED_PARAM(leakedPingLoader);
66}
67
68// http://www.whatwg.org/specs/web-apps/current-work/multipage/links.html#hyperlink-auditing
69void PingLoader::sendPing(Frame* frame, const KURL& pingURL, const KURL& destinationURL)
70{
71    ResourceRequest request(pingURL);
72    request.setTargetType(ResourceRequest::TargetIsSubresource);
73    request.setHTTPMethod("POST");
74    request.setHTTPContentType("text/ping");
75    request.setHTTPBody(FormData::create("PING"));
76    request.setHTTPHeaderField("Cache-Control", "max-age=0");
77    frame->loader()->addExtraFieldsToSubresourceRequest(request);
78
79    SecurityOrigin* sourceOrigin = frame->document()->securityOrigin();
80    RefPtr<SecurityOrigin> pingOrigin = SecurityOrigin::create(pingURL);
81    FrameLoader::addHTTPOriginIfNeeded(request, sourceOrigin->toString());
82    request.setHTTPHeaderField("Ping-To", destinationURL);
83    if (sourceOrigin->isSameSchemeHostPort(pingOrigin.get()))
84        request.setHTTPHeaderField("Ping-From", frame->document()->url());
85    else if (!SecurityOrigin::shouldHideReferrer(pingURL, frame->loader()->outgoingReferrer()))
86        request.setHTTPReferrer(frame->loader()->outgoingReferrer());
87    OwnPtr<PingLoader> pingLoader = adoptPtr(new PingLoader(frame, request));
88
89    // Leak the ping loader, since it will kill itself as soon as it receives a response.
90    PingLoader* leakedPingLoader = pingLoader.leakPtr();
91    UNUSED_PARAM(leakedPingLoader);
92}
93
94PingLoader::PingLoader(Frame* frame, const ResourceRequest& request)
95    : m_timeout(this, &PingLoader::timeout)
96{
97    unsigned long identifier = frame->page()->progress()->createUniqueIdentifier();
98    m_shouldUseCredentialStorage = frame->loader()->client()->shouldUseCredentialStorage(frame->loader()->activeDocumentLoader(), identifier);
99    m_handle = ResourceHandle::create(frame->loader()->networkingContext(), request, this, false, false);
100
101    // If the server never responds, FrameLoader won't be able to cancel this load and
102    // we'll sit here waiting forever. Set a very generous timeout, just in case.
103    m_timeout.startOneShot(60000);
104}
105
106PingLoader::~PingLoader()
107{
108    m_handle->cancel();
109}
110
111}
112