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https://github.com/XRPLF/rippled.git
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Refactor beast core, http, tests, and examples:
* Fix warnings * Port cmake scripts to linux * Add command line options for running test suites * Add examples to CMakeLists * Return std::uint64_t from writer::content_length * basic_parser::write takes asio::const_buffer instead of pointer and size * Turn message test back on now that it passes * Rename to http::headers, use std::allocator, remove http_headers * http::message::method is now a string * Refactor to_string for ConstBufferSequence * Remove chunk_encode from the public interface * Initialize members for default constructed iterators * Disallow default construction for dependent buffer sequences Refactor http::message serialization: * Serialization no longer creates a copy of the headers and modifies them * New function prepare(), sets Connection, Transfer-Encoding, Content-Length based on the body attributes and caller options. Callers can use prepare() to have the fields set automatically, or they can set the fields manually. * Use write for operator<< * Tests for serialization
This commit is contained in:
Vinnie Falco
267
examples/websocket_async_echo_peer.hpp
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267
examples/websocket_async_echo_peer.hpp
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//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
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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 BEAST_WEBSOCKET_ASYNC_ECHO_PEER_H_INCLUDED
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#define BEAST_WEBSOCKET_ASYNC_ECHO_PEER_H_INCLUDED
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#include <beast/placeholders.hpp>
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#include <beast/streambuf.hpp>
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#include <beast/websocket.hpp>
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#include <boost/optional.hpp>
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#include <functional>
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#include <iostream>
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#include <memory>
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#include <thread>
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namespace beast {
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namespace websocket {
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// Asynchronous WebSocket echo client/server
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//
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class async_echo_peer
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{
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public:
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using error_code = boost::system::error_code;
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using endpoint_type = boost::asio::ip::tcp::endpoint;
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using address_type = boost::asio::ip::address;
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using socket_type = boost::asio::ip::tcp::socket;
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private:
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boost::asio::io_service ios_;
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socket_type sock_;
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boost::asio::ip::tcp::acceptor acceptor_;
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std::vector<std::thread> thread_;
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public:
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async_echo_peer(bool server,
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endpoint_type const& ep, std::size_t threads)
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: sock_(ios_)
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, acceptor_(ios_)
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{
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if(server)
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{
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error_code ec;
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acceptor_.open(ep.protocol(), ec);
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maybe_throw(ec, "open");
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acceptor_.bind(ep, ec);
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maybe_throw(ec, "bind");
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acceptor_.listen(
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boost::asio::socket_base::max_connections, ec);
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maybe_throw(ec, "listen");
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acceptor_.async_accept(sock_,
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std::bind(&async_echo_peer::on_accept, this,
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beast::asio::placeholders::error));
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}
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else
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{
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Peer{std::move(sock_), ep};
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}
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thread_.reserve(threads);
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for(std::size_t i = 0; i < threads; ++i)
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thread_.emplace_back(
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[&]{ ios_.run(); });
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}
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~async_echo_peer()
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{
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error_code ec;
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ios_.dispatch(
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[&]{ acceptor_.close(ec); });
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for(auto& t : thread_)
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t.join();
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}
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private:
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class Peer
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{
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struct data
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{
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int state = 0;
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boost::optional<endpoint_type> ep;
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websocket::stream<socket_type> ws;
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websocket::opcode op;
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beast::streambuf sb;
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int id;
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data(socket_type&& sock_)
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: ws(std::move(sock_))
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, id([]
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{
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static int n = 0;
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return ++n;
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}())
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{
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}
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data(socket_type&& sock_,
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endpoint_type const& ep_)
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: ep(ep_)
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, ws(std::move(sock_))
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, id([]
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{
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static int n = 0;
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return ++n;
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}())
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{
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}
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};
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std::shared_ptr<data> d_;
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public:
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Peer(Peer&&) = default;
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Peer(Peer const&) = default;
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Peer& operator=(Peer&&) = delete;
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Peer& operator=(Peer const&) = delete;
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struct identity
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{
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template<class Body, class Headers>
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void
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operator()(http::message<true, Body, Headers>& req)
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{
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req.headers.replace("User-Agent", "async_echo_client");
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}
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template<class Body, class Headers>
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void
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operator()(http::message<false, Body, Headers>& resp)
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{
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resp.headers.replace("Server", "async_echo_server");
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}
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};
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template<class... Args>
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explicit
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Peer(socket_type&& sock, Args&&... args)
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: d_(std::make_shared<data>(
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std::forward<socket_type>(sock),
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std::forward<Args>(args)...))
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{
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auto& d = *d_;
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d.ws.set_option(decorate(identity{}));
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d.ws.set_option(read_message_max(64 * 1024 * 1024));
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run();
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}
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void run()
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{
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auto& d = *d_;
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if(! d.ep)
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{
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d.ws.async_accept(std::move(*this));
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}
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else
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{
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d.state = 4;
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d.ws.next_layer().async_connect(
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*d.ep, std::move(*this));
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}
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}
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void operator()(error_code ec)
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{
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auto& d = *d_;
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switch(d_->state)
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{
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// did accept
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case 0:
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if(ec)
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return fail(ec, "async_accept");
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// start
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case 1:
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if(ec)
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return fail(ec, "async_handshake");
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d.sb.consume(d.sb.size());
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// read message
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d.state = 2;
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d.ws.async_read(d.op, d.sb, std::move(*this));
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return;
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// got message
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case 2:
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if(ec == websocket::error::closed)
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return;
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if(ec)
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return fail(ec, "async_read");
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// write message
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d.state = 1;
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d.ws.set_option(websocket::message_type(d.op));
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d.ws.async_write(d.sb.data(), std::move(*this));
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return;
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// connected
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case 4:
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if(ec)
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return fail(ec, "async_connect");
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d.state = 1;
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d.ws.async_handshake(
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d.ep->address().to_string() + ":" +
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std::to_string(d.ep->port()),
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"/", std::move(*this));
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return;
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}
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}
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private:
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void
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fail(error_code ec, std::string what)
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{
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if(ec != websocket::error::closed)
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std::cerr << "#" << d_->id << " " <<
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what << ": " << ec.message() << std::endl;
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}
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};
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void
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fail(error_code ec, std::string what)
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{
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std::cerr <<
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what << ": " << ec.message() << std::endl;
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}
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void
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maybe_throw(error_code ec, std::string what)
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{
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if(ec)
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{
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fail(ec, what);
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throw ec;
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}
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}
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void
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on_accept(error_code ec)
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{
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if(! acceptor_.is_open())
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return;
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maybe_throw(ec, "accept");
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socket_type sock(std::move(sock_));
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acceptor_.async_accept(sock_,
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std::bind(&async_echo_peer::on_accept, this,
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beast::asio::placeholders::error));
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Peer{std::move(sock)};
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}
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};
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} // websocket
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} // beast
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#endif
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