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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ResourceHandle.h"
#include "ResourceHandleClient.h"
#include "Timer.h"
namespace WebCore {
// This class triggers asynchronous loads independent of the networking context staying alive (i.e., auditing pingbacks).
// The object just needs to live long enough to ensure the message was actually sent.
// As soon as any callback is received from the ResourceHandle, this class will cancel the load and delete itself.
class PingHandle final : private ResourceHandleClient {
WTF_MAKE_NONCOPYABLE(PingHandle); WTF_MAKE_FAST_ALLOCATED;
public:
enum class UsesAsyncCallbacks {
Yes,
No,
};
PingHandle(NetworkingContext* networkingContext, const ResourceRequest& request, bool shouldUseCredentialStorage, UsesAsyncCallbacks useAsyncCallbacks, bool shouldFollowRedirects)
: m_timeoutTimer(*this, &PingHandle::timeoutTimerFired)
, m_shouldUseCredentialStorage(shouldUseCredentialStorage)
, m_shouldFollowRedirects(shouldFollowRedirects)
, m_usesAsyncCallbacks(useAsyncCallbacks)
{
m_handle = ResourceHandle::create(networkingContext, request, this, false, false);
// If the server never responds, this object will hang around forever.
// Set a very generous timeout, just in case.
m_timeoutTimer.startOneShot(60000_s);
}
private:
ResourceRequest willSendRequest(ResourceHandle*, ResourceRequest&& request, ResourceResponse&&) final
{
return m_shouldFollowRedirects ? request : ResourceRequest();
}
void willSendRequestAsync(ResourceHandle* handle, ResourceRequest&& request, ResourceResponse&&) final
{
if (m_shouldFollowRedirects) {
handle->continueWillSendRequest(WTFMove(request));
return;
}
delete this;
}
void didReceiveResponse(ResourceHandle*, ResourceResponse&&) final { delete this; }
void didReceiveBuffer(ResourceHandle*, Ref<SharedBuffer>&&, int) final { delete this; };
void didFinishLoading(ResourceHandle*) final { delete this; }
void didFail(ResourceHandle*, const ResourceError&) final { delete this; }
bool shouldUseCredentialStorage(ResourceHandle*) final { return m_shouldUseCredentialStorage; }
bool usesAsyncCallbacks() final { return m_usesAsyncCallbacks == UsesAsyncCallbacks::Yes; }
void timeoutTimerFired() { delete this; }
virtual ~PingHandle()
{
if (m_handle) {
ASSERT(m_handle->client() == this);
m_handle->clearClient();
m_handle->cancel();
}
}
RefPtr<ResourceHandle> m_handle;
Timer m_timeoutTimer;
bool m_shouldUseCredentialStorage;
bool m_shouldFollowRedirects;
UsesAsyncCallbacks m_usesAsyncCallbacks;
};
} // namespace WebCore
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