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/*
* Copyright (C) 2017 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
#include "config.h"
#include "KeepaliveRequestTracker.h"
namespace WebCore {
const uint64_t maxInflightKeepaliveBytes { 65536 }; // 64 kibibytes as per Fetch specification.
KeepaliveRequestTracker::~KeepaliveRequestTracker()
{
auto inflightRequests = WTFMove(m_inflightKeepaliveRequests);
for (auto& resource : inflightRequests)
resource->removeClient(*this);
}
bool KeepaliveRequestTracker::tryRegisterRequest(CachedResource& resource)
{
ASSERT(resource.options().keepAlive);
auto body = resource.resourceRequest().httpBody();
if (!body)
return true;
uint64_t bodySize = body->lengthInBytes();
if (m_inflightKeepaliveBytes + bodySize > maxInflightKeepaliveBytes)
return false;
registerRequest(resource);
return true;
}
void KeepaliveRequestTracker::registerRequest(CachedResource& resource)
{
ASSERT(resource.options().keepAlive);
auto body = resource.resourceRequest().httpBody();
if (!body)
return;
ASSERT(!m_inflightKeepaliveRequests.contains(&resource));
m_inflightKeepaliveRequests.append(&resource);
m_inflightKeepaliveBytes += body->lengthInBytes();
ASSERT(m_inflightKeepaliveBytes <= maxInflightKeepaliveBytes);
resource.addClient(*this);
}
void KeepaliveRequestTracker::responseReceived(CachedResource& resource, const ResourceResponse&, CompletionHandler<void()>&& completionHandler)
{
// Per Fetch specification, allocated quota should be returned before the promise is resolved,
// which is when the response is received.
unregisterRequest(resource);
if (completionHandler)
completionHandler();
}
void KeepaliveRequestTracker::notifyFinished(CachedResource& resource, const NetworkLoadMetrics&)
{
unregisterRequest(resource);
}
void KeepaliveRequestTracker::unregisterRequest(CachedResource& resource)
{
ASSERT(resource.options().keepAlive);
m_inflightKeepaliveBytes -= resource.resourceRequest().httpBody()->lengthInBytes();
ASSERT(m_inflightKeepaliveBytes <= maxInflightKeepaliveBytes);
resource.removeClient(*this);
bool wasRemoved = m_inflightKeepaliveRequests.removeFirst(&resource); // May destroy |resource|.
ASSERT_UNUSED(wasRemoved, wasRemoved);
}
}
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