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/*
* Copyright (C) 2009, 2010, 2011 Research In Motion Limited. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "DeferredData.h"
#include "NetworkJob.h"
namespace WebCore {
DeferredData::DeferredData(NetworkJob& job)
: m_job(job)
, m_processDataTimer(this, &DeferredData::fireProcessDataTimer)
, m_deferredStatusReceived(false)
, m_status(0)
, m_bytesSent(0)
, m_totalBytesToBeSent(0)
, m_deferredCloseStatus(BlackBerry::Platform::FilterStream::StatusSuccess)
, m_deferredClose(false)
, m_inProcessDeferredData(false)
{
}
void DeferredData::deferOpen(int status, const String& message)
{
m_deferredStatusReceived = true;
m_status = status;
m_message = message;
}
void DeferredData::deferHeaderReceived(const String& key, const String& value)
{
m_headerKeys.append(key);
m_headerValues.append(value);
}
void DeferredData::deferMultipartHeaderReceived(const String& key, const String& value)
{
m_multipartHeaderKeys.append(key);
m_multipartheaderValues.append(value);
}
void DeferredData::deferDataSent(unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
{
m_bytesSent = bytesSent;
m_totalBytesToBeSent = totalBytesToBeSent;
}
void DeferredData::deferDataReceived(const char* buf, size_t len)
{
m_dataSegments.append(Vector<char>());
m_dataSegments.rbegin()->append(buf, len);
}
void DeferredData::deferClose(int status)
{
m_deferredCloseStatus = status;
m_deferredClose = true;
}
bool DeferredData::processHeaders(Vector<String>& headerKeys, Vector<String>& headerValues, HandleHeadersFunction function)
{
size_t numHeaders = headerKeys.size();
ASSERT(headerValues.size() == numHeaders);
for (size_t i = 0; i < numHeaders; ++i) {
(m_job.*function)(headerKeys[i], headerValues[i]);
if (m_job.isDeferringLoading()) {
// Remove all the headers that have already been processed.
headerKeys.remove(0, i + 1);
headerValues.remove(0, i + 1);
return false;
}
if (m_job.isCancelled()) {
// Don't bother removing headers; job will be deleted.
return false;
}
}
headerKeys.clear();
headerValues.clear();
return true;
}
void DeferredData::processDeferredData()
{
if (m_inProcessDeferredData)
return;
RecursionGuard guard(m_inProcessDeferredData);
// Sending data to webkit causes it to be parsed and javascript executed,
// which might cause it to cancel the job or set defersLoading again. So
// to be safe, check this after every step.
if (m_job.isDeferringLoading() || m_job.isCancelled())
return;
if (m_deferredStatusReceived) {
m_job.handleNotifyStatusReceived(m_status, m_message);
m_deferredStatusReceived = false;
if (m_job.isDeferringLoading() || m_job.isCancelled())
return;
}
if (!processHeaders(m_headerKeys, m_headerValues, &NetworkJob::handleNotifyHeaderReceived)
|| !processHeaders(m_multipartHeaderKeys, m_multipartheaderValues, &NetworkJob::handleNotifyMultipartHeaderReceived))
return;
// Only process 32k of data at a time to avoid blocking the event loop for too long.
static const unsigned maxData = 32 * 1024;
unsigned totalData = 0;
while (!m_dataSegments.isEmpty()) {
const Vector<char>& buffer = m_dataSegments.first();
m_job.handleNotifyDataReceived(buffer.data(), buffer.size());
totalData += buffer.size();
if (m_job.isCancelled()) {
// Don't bother removing segment; job will be deleted.
return;
}
m_dataSegments.removeFirst();
if (m_job.isDeferringLoading()) {
// Stop processing until deferred loading is turned off again.
return;
}
if (totalData >= maxData && !m_dataSegments.isEmpty()) {
// Pause for now, and schedule a timer to continue after running the event loop.
scheduleProcessDeferredData();
return;
}
}
if (m_totalBytesToBeSent) {
m_job.handleNotifyDataSent(m_bytesSent, m_totalBytesToBeSent);
m_bytesSent = 0;
m_totalBytesToBeSent = 0;
}
if (m_deferredClose) {
m_job.handleNotifyClose(m_deferredCloseStatus);
m_deferredClose = false;
if (m_job.isDeferringLoading() || m_job.isCancelled())
return;
}
}
void DeferredData::fireProcessDataTimer(Timer<DeferredData>*)
{
processDeferredData();
}
} // namespace WebCore
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