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2cb3834bbb
Beast.WebSocket provides developers with a robust WebSocket implementation built on Boost.Asio with a consistent asynchronous model using a modern C++ approach.
135 lines
3.6 KiB
C++
135 lines
3.6 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef RIPPLE_SERVER_WSSESSION_H_INCLUDED
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#define RIPPLE_SERVER_WSSESSION_H_INCLUDED
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#include <ripple/server/Port.h>
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#include <ripple/server/Writer.h>
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#include <boost/asio/buffer.hpp>
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#include <boost/asio/ip/tcp.hpp>
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#include <boost/logic/tribool.hpp>
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#include <algorithm>
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#include <functional>
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#include <memory>
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#include <utility>
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#include <vector>
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namespace ripple {
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class WSMsg
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{
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public:
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WSMsg() = default;
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WSMsg(WSMsg const&) = delete;
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WSMsg& operator=(WSMsg const&) = delete;
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virtual ~WSMsg() = default;
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/** Retrieve message data.
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Returns a tribool indicating whether or not
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data is available, and a ConstBufferSequence
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representing the data.
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tribool values:
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maybe: Data is not ready yet
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false: Data is available
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true: Data is available, and
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it is the last chunk of bytes.
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Derived classes that do not know when the data
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ends (for example, when returning the output of a
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paged database query) may return `true` and an
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empty vector.
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*/
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virtual
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std::pair<boost::tribool,
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std::vector<boost::asio::const_buffer>>
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prepare(std::size_t bytes,
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std::function<void(void)> resume) = 0;
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};
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template<class Streambuf>
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class StreambufWSMsg : public WSMsg
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{
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Streambuf sb_;
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std::size_t n_ = 0;
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public:
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StreambufWSMsg(Streambuf&& sb)
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: sb_(std::move(sb))
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{
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}
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std::pair<boost::tribool,
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std::vector<boost::asio::const_buffer>>
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prepare(std::size_t bytes,
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std::function<void(void)>) override
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{
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if(sb_.size() == 0)
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return { true, {} };
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sb_.consume(n_);
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boost::tribool done;
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// VFALCO TODO respect `bytes` fully
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if(bytes < sb_.size())
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{
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n_ = bytes;
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done = boost::indeterminate;
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}
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else
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{
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n_ = sb_.size();
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done = true;
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}
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std::vector<boost::asio::const_buffer> vb;
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auto const& data = sb_.data();
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vb.reserve(std::distance(
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data.begin(), data.end()));
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std::copy(data.begin(), data.end(),
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std::back_inserter(vb));
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return { done, vb };
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}
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};
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struct WSSession
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{
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std::shared_ptr<void> appDefined;
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virtual
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Port const&
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port() const = 0;
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virtual
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boost::asio::ip::tcp::endpoint const&
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remote_endpoint() const = 0;
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/** Send a WebSockets message. */
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virtual
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void
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send(std::shared_ptr<WSMsg> w) = 0;
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virtual
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void
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close() = 0;
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};
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} // ripple
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#endif
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