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rstudio/src/cpp/core/http/SocketProxy.cpp at master · pearsonca/rstudio · GitHub
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SocketProxy.cpp
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SocketProxy.cpp
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/*
* SocketProxy.cpp
*
* Copyright (C) 2009-12 by RStudio, PBC
*
* Unless you have received this program directly from RStudio pursuant
* to the terms of a commercial license agreement with RStudio, then
* this program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
//
boost requires that winsock2.h must be included before windows.h
#
ifdef
_WIN32
#
include
<
winsock2.h
>
#
endif
#
ifndef
_WIN32
#
include
<
core/http/BoostAsioSsl.hpp
>
#
endif
#
include
<
core/http/SocketProxy.hpp
>
#
include
<
core/http/Util.hpp
>
#
include
<
iostream
>
#
include
<
boost/bind.hpp
>
#
include
<
boost/asio/placeholders.hpp
>
#
include
<
shared_core/Error.hpp
>
#
include
<
core/Log.hpp
>
#
include
<
core/http/SocketUtils.hpp
>
using
namespace
rstudio
::core
;
namespace
rstudio
{
namespace
core
{
namespace
http
{
void
SocketProxy::readClient
()
{
ptrClient_->
asyncReadSome
(
boost::asio::buffer
(clientBuffer_),
boost::bind
(
&SocketProxy::handleClientRead,
SocketProxy::shared_from_this
(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
void
SocketProxy::readServer
()
{
ptrServer_->
asyncReadSome
(
boost::asio::buffer
(serverBuffer_),
boost::bind
(
&SocketProxy::handleServerRead,
SocketProxy::shared_from_this
(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
void
SocketProxy::handleClientRead
(
const
boost::system::error_code& e,
std::
size_t
bytesTransferred)
{
//
client and server reads can happen simultaneously on two threads; a race
//
condition during close can lead to the socket not getting properly
//
shut down. use a simple mutex to prevent the threads from simultaneously
//
writing to the socket state.
LOCK_MUTEX
(socketMutex_)
{
if
(!e)
{
std::vector<boost::asio::const_buffer> buffers;
buffers.
push_back
(
boost::asio::buffer
(clientBuffer_.
data
(),
bytesTransferred));
ptrServer_->
asyncWrite
(buffers,
boost::bind
(
&SocketProxy::handleServerWrite,
SocketProxy::shared_from_this
(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
else
{
handleError
(e,
ERROR_LOCATION
);
}
}
END_LOCK_MUTEX
}
void
SocketProxy::handleServerRead
(
const
boost::system::error_code& e,
std::
size_t
bytesTransferred)
{
LOCK_MUTEX
(socketMutex_)
{
if
(!e)
{
std::vector<boost::asio::const_buffer> buffers;
buffers.
push_back
(
boost::asio::buffer
(serverBuffer_.
data
(),
bytesTransferred));
ptrClient_->
asyncWrite
(buffers,
boost::bind
(
&SocketProxy::handleClientWrite,
SocketProxy::shared_from_this
(),
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
else
{
handleError
(e,
ERROR_LOCATION
);
}
}
END_LOCK_MUTEX
}
void
SocketProxy::handleClientWrite
(
const
boost::system::error_code& e,
std::
size_t
bytesTransferred)
{
if
(!e)
{
readServer
();
}
else
{
handleError
(e,
ERROR_LOCATION
);
}
}
void
SocketProxy::handleServerWrite
(
const
boost::system::error_code& e,
std::
size_t
bytesTransferred)
{
if
(!e)
{
readClient
();
}
else
{
handleError
(e,
ERROR_LOCATION
);
}
}
void
SocketProxy::handleError
(
const
boost::system::error_code& e,
const
core::ErrorLocation& location)
{
//
log the error if it wasn't connection terminated
Error
error
(e, location);
if
(!
http::isConnectionTerminatedError
(error) &&
(e != boost::asio::error::operation_aborted) &&
!
util::isSslShutdownError
(e))
{
LOG_ERROR
(error);
}
close
();
}
void
SocketProxy::close
()
{
ptrClient_->
close
();
ptrServer_->
close
();
}
}
//
namespace http
}
//
namespace core
}
//
namespace rstudio
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