21101426787

Committed 17 Jan 2026 09:52PM UTC coverage: 28.005% (+0.01%) from 27.995%

Build # 21101426787

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github

Committed by

reinder

Commit Message

[traintastic] fixed restart crash (out of memory)

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12 of 38 new or added lines in 11 files covered. (31.58%)

5 existing lines in 2 files now uncovered.

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/server/src/network/server.cpp

/**
 * This file is part of Traintastic,
 * see <https://github.com/traintastic/traintastic>.
 *
 * Copyright (C) 2022-2026 Reinder Feenstra
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include "server.hpp"
#include <boost/beast/http/buffer_body.hpp>
#include <boost/beast/http/file_body.hpp>
#include <boost/url/url_view.hpp>
#include <boost/url/parse.hpp>
#include <span>
#include <traintastic/network/message.hpp>
#include <traintastic/utils/standardpaths.hpp>
#include <version.hpp>
#include "clientconnection.hpp"
#include "httpconnection.hpp"
#include "webthrottleconnection.hpp"
#include "../core/eventloop.hpp"
#include "../log/log.hpp"
#include "../log/logmessageexception.hpp"
#include "../utils/endswith.hpp"
#include "../utils/setthreadname.hpp"
#include "../utils/startswith.hpp"
#include "../utils/stripprefix.hpp"

//#define SERVE_FROM_FS // Development option, NOT for production!
#ifdef SERVE_FROM_FS
  #include "../utils/readfile.hpp"

  static const auto www = std::filesystem::absolute(std::filesystem::path(__FILE__).parent_path() / ".." / ".." / "www");
#else
  #include <resource/www/throttle.html.hpp>
  #include <resource/www/css/throttle.css.hpp>
  #include <resource/www/js/throttle.js.hpp>
#endif
#include <resource/www/css/normalize.css.hpp>
#include <resource/shared/gfx/appicon.ico.hpp>

#define IS_SERVER_THREAD (std::this_thread::get_id() == m_threadId)

namespace beast = boost::beast;
namespace http = beast::http;

namespace
{

static constexpr std::string_view serverHeader{"Traintastic-server/" TRAINTASTIC_VERSION_FULL};
static constexpr std::string_view contentTypeTextPlain{"text/plain"};
static constexpr std::string_view contentTypeTextHtml{"text/html"};
static constexpr std::string_view contentTypeTextCss{"text/css"};
static constexpr std::string_view contentTypeTextJavaScript{"text/javascript"};
static constexpr std::string_view contentTypeImageXIcon{"image/x-icon"};
static constexpr std::string_view contentTypeImagePng{"image/png"};
static constexpr std::string_view contentTypeApplicationGzip{"application/gzip"};
static constexpr std::string_view contentTypeApplicationJson{"application/json"};
static constexpr std::string_view contentTypeApplicationXml{"application/xml"};

static constexpr std::array<std::string_view, 7> manualAllowedExtensions{{
  ".html",
  ".css",
  ".js",
  ".json",
  ".png",
  ".xml",
  ".xml.gz",
}};

std::string_view getContentType(std::string_view filename)
{
  if(endsWith(filename, ".html"))
  {
    return contentTypeTextHtml;
  }
  else if(endsWith(filename, ".png"))
  {
    return contentTypeImagePng;
  }
  else if(endsWith(filename, ".css"))
  {
    return contentTypeTextCss;
  }
  else if(endsWith(filename, ".js"))
  {
    return contentTypeTextJavaScript;
  }
  else if(endsWith(filename, ".json"))
  {
    return contentTypeApplicationJson;
  }
  else if(endsWith(filename, ".xml"))
  {
    return contentTypeApplicationXml;
  }
  else if(endsWith(filename, ".gz"))
  {
    return contentTypeApplicationGzip;
  }
  return {};
}

http::message_generator notFound(const http::request<http::string_body>& request)
{
  http::response<http::string_body> response{http::status::not_found, request.version()};
  response.set(http::field::server, serverHeader);
  response.set(http::field::content_type, contentTypeTextPlain);
  response.keep_alive(request.keep_alive());
  response.body() = "404 Not Found";
  response.prepare_payload();
  return response;
}

http::message_generator methodNotAllowed(const http::request<http::string_body>& request, std::initializer_list<http::verb> allowedMethods)
{
  std::string allow;
  for(auto method : allowedMethods)
  {
    allow.append(http::to_string(method)).append(" ");
  }
  http::response<http::string_body> response{http::status::method_not_allowed, request.version()};
  response.set(http::field::server, serverHeader);
  response.set(http::field::content_type, contentTypeTextPlain);
  response.set(http::field::allow, allow);
  response.keep_alive(request.keep_alive());
  response.body() = "405 Method Not Allowed";
  response.prepare_payload();
  return response;
}

http::message_generator binary(const http::request<http::string_body>& request, std::string_view contentType, std::span<const std::byte> body)
{
  if(request.method() != http::verb::get && request.method() != http::verb::head)
  {
    return methodNotAllowed(request, {http::verb::get, http::verb::head});
  }
  http::response<http::buffer_body> response{http::status::ok, request.version()};
  response.set(http::field::server, serverHeader);
  response.set(http::field::content_type, contentType);
  response.keep_alive(request.keep_alive());
  if(request.method() == http::verb::head)
  {
    response.content_length(body.size());
  }
  else
  {
    response.body().data = const_cast<std::byte*>(body.data());
    response.body().size = body.size();
  }
  response.body().more = false;
  response.prepare_payload();
  return response;
}

http::message_generator text(const http::request<http::string_body>& request, std::string_view contentType, std::string_view body)
{
  if(request.method() != http::verb::get && request.method() != http::verb::head)
  {
    return methodNotAllowed(request, {http::verb::get, http::verb::head});
  }
  http::response<http::string_body> response{http::status::ok, request.version()};
  response.set(http::field::server, serverHeader);
  response.set(http::field::content_type, contentType);
  response.keep_alive(request.keep_alive());
  if(request.method() == http::verb::head)
  {
    response.content_length(body.size());
  }
  else
  {
    response.body() = body;
  }
  response.prepare_payload();
  return response;
}

http::message_generator textPlain(const http::request<http::string_body>& request, std::string_view body)
{
  return text(request, contentTypeTextPlain, body);
}

http::message_generator textHtml(const http::request<http::string_body>& request, std::string_view body)
{
  return text(request, contentTypeTextHtml, body);
}

http::message_generator textCss(const http::request<http::string_body>& request, std::string_view body)
{
  return text(request, contentTypeTextCss, body);
}

http::message_generator textJavaScript(const http::request<http::string_body>& request, std::string_view body)
{
  return text(request, contentTypeTextJavaScript, body);
}

http::message_generator serveFileFromFileSystem(const http::request<http::string_body>& request, std::string_view target, const std::filesystem::path& root, std::span<const std::string_view> allowedExtensions)
{
  if(request.method() != http::verb::get && request.method() != http::verb::head)
  {
    return methodNotAllowed(request, {http::verb::get, http::verb::head});
  }

  if(const auto url = boost::urls::parse_origin_form(target))
  {
    const std::filesystem::path path = std::filesystem::weakly_canonical(root / url->path().substr(1));

    if(std::mismatch(path.begin(), path.end(), root.begin(), root.end()).second == root.end() && std::filesystem::exists(path))
    {
      const auto filename = path.string();

      if(endsWith(filename, allowedExtensions))
      {
        http::file_body::value_type file;
        boost::system::error_code ec;

        file.open(filename.c_str(), boost::beast::file_mode::scan, ec);
        if(!ec)
        {
          http::response<http::file_body> response{
            std::piecewise_construct,
            std::make_tuple(std::move(file)),
            std::make_tuple(http::status::ok, request.version())};

          response.set(http::field::server, serverHeader);
          response.set(http::field::content_type, getContentType(filename));
          response.content_length(file.size());
          response.keep_alive(request.keep_alive());

          if(request.method() == http::verb::head)
          {
            response.body().close(); // don’t send file contents
          }

          return response;
        }
      }
    }
  }

  return notFound(request);
}

}

Server::Server(bool localhostOnly, uint16_t port, bool discoverable)
  : m_ioContext{1}
  , m_acceptor{m_ioContext}
  , m_socketUDP{m_ioContext}
  , m_localhostOnly{localhostOnly}
  , m_manualPath{getManualPath()}
{
  assert(isEventLoopThread());

  boost::system::error_code ec;
  boost::asio::ip::tcp::endpoint endpoint(localhostOnly ? boost::asio::ip::address_v4::loopback() : boost::asio::ip::address_v4::any(), port);

  m_acceptor.open(endpoint.protocol(), ec);
  if(ec)
    throw LogMessageException(LogMessage::F1001_OPENING_TCP_SOCKET_FAILED_X, ec);

  m_acceptor.set_option(boost::asio::socket_base::reuse_address(true), ec);
  if(ec)
    throw LogMessageException(LogMessage::F1002_TCP_SOCKET_ADDRESS_REUSE_FAILED_X, ec);

  m_acceptor.bind(endpoint, ec);
  if(ec)
    throw LogMessageException(LogMessage::F1003_BINDING_TCP_SOCKET_FAILED_X, ec);

  m_acceptor.listen(5, ec);
  if(ec)
    throw LogMessageException(LogMessage::F1004_TCP_SOCKET_LISTEN_FAILED_X, ec);

  if(discoverable)
  {
    if(port == defaultPort)
    {
      m_socketUDP.open(boost::asio::ip::udp::v4(), ec);
      if(ec)
        throw LogMessageException(LogMessage::F1005_OPENING_UDP_SOCKET_FAILED_X, ec);

      m_socketUDP.set_option(boost::asio::socket_base::reuse_address(true), ec);
      if(ec)
        throw LogMessageException(LogMessage::F1006_UDP_SOCKET_ADDRESS_REUSE_FAILED_X, ec);

      m_socketUDP.bind(boost::asio::ip::udp::endpoint(boost::asio::ip::address_v4::any(), defaultPort), ec);
      if(ec)
        throw LogMessageException(LogMessage::F1007_BINDING_UDP_SOCKET_FAILED_X, ec);

      Log::log(id, LogMessage::N1005_DISCOVERY_ENABLED);
    }
    else
    {
      Log::log(id, LogMessage::W1001_DISCOVERY_DISABLED_ONLY_ALLOWED_ON_PORT_X, defaultPort);
      discoverable = false;
    }
  }
  else
    Log::log(id, LogMessage::N1006_DISCOVERY_DISABLED);

  Log::log(id, LogMessage::N1007_LISTENING_AT_X_X, m_acceptor.local_endpoint().address().to_string(), m_acceptor.local_endpoint().port());

  m_ioContext.post(
    [this, discoverable]()
    {
      if(discoverable)
        doReceive();

      doAccept();
    });

  m_thread = std::thread(
    [this]()
    {
#ifndef NDEBUG
      m_threadId = std::this_thread::get_id();
#endif
      setThreadName("server");
      m_ioContext.run();
    });
}

Server::~Server()
{
  assert(isEventLoopThread());

  if(!m_ioContext.stopped())
  {
    for(const auto& connection : m_connections)
    {
      connection->disconnect();
    }

    m_ioContext.post(
      [this]()
      {
        boost::system::error_code ec;
        if(m_acceptor.cancel(ec))
          Log::log(id, LogMessage::E1008_SOCKET_ACCEPTOR_CANCEL_FAILED_X, ec);

        m_acceptor.close();

        m_socketUDP.close();
      });
  }

  if(m_thread.joinable())
    m_thread.join();
}

void Server::connectionGone(const std::shared_ptr<WebSocketConnection>& connection)
{
  assert(isEventLoopThread());

  m_connections.erase(std::find(m_connections.begin(), m_connections.end(), connection));
}

void Server::doReceive()
{
  assert(IS_SERVER_THREAD);

  m_socketUDP.async_receive_from(boost::asio::buffer(m_udpBuffer), m_remoteEndpoint,
    [this](const boost::system::error_code& ec, std::size_t bytesReceived)
    {
      if(!ec)
      {
        if(bytesReceived == sizeof(Message::Header))
        {
          Message message(*reinterpret_cast<Message::Header*>(m_udpBuffer.data()));

          if(!m_localhostOnly || m_remoteEndpoint.address().is_loopback())
          {
            if(message.dataSize() == 0)
            {
              std::unique_ptr<Message> response = processMessage(message);
              if(response)
              {
                m_socketUDP.async_send_to(boost::asio::buffer(**response, response->size()), m_remoteEndpoint,
                  [this](const boost::system::error_code& /*ec*/, std::size_t /*bytesTransferred*/)
                  {
                    doReceive();
                  });
                return;
              }
            }
          }
        }
        doReceive();
      }
      else if(ec != boost::asio::error::operation_aborted)
      {
        Log::log(id, LogMessage::E1003_UDP_RECEIVE_ERROR_X, ec.message());
      }
    });
}

std::unique_ptr<Message> Server::processMessage(const Message& message)
{
  if(message.command() == Message::Command::Discover && message.isRequest())
  {
    std::unique_ptr<Message> response = Message::newResponse(message.command(), message.requestId());
    response->write(boost::asio::ip::host_name());
    response->write<uint16_t>(TRAINTASTIC_VERSION_MAJOR);
    response->write<uint16_t>(TRAINTASTIC_VERSION_MINOR);
    response->write<uint16_t>(TRAINTASTIC_VERSION_PATCH);
    assert(response->size() <= 1500); // must fit in a UDP packet
    return response;
  }

  return {};
}

void Server::doAccept()
{
  assert(IS_SERVER_THREAD);

  m_acceptor.async_accept(
    [this](boost::system::error_code ec, boost::asio::ip::tcp::socket socket)
    {
      if(!ec)
      {
        std::make_shared<HTTPConnection>(shared_from_this(), std::move(socket))->start();

        doAccept();
      }
      else if(ec != boost::asio::error::operation_aborted)
      {
        Log::log(id, LogMessage::E1004_TCP_ACCEPT_ERROR_X, ec.message());
      }
    });
}

http::message_generator Server::handleHTTPRequest(http::request<http::string_body>&& request)
{
  const auto target = request.target();
  if(target == "/")
  {
    return textHtml(request,
      "<!DOCTYPE html>"
      "<html>"
      "<head>"
        "<meta charset=\"utf-8\">"
        "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1, shrink-to-fit=no\">"
        "<title>Traintastic v" TRAINTASTIC_VERSION_FULL "</title>"
      "</head>"
      "<body>"
        "<h1>Traintastic <small>v" TRAINTASTIC_VERSION_FULL "</small></h1>"
        "<ul>"
          "<li><a href=\"/manual/en/index.html\">Manual</a></li>"
          "<li><a href=\"/throttle\">Web throttle</a></li>"
        "</ul>"
      "</body>"
      "</html>");
  }
  if(target == "/favicon.ico")
  {
    return binary(request, contentTypeImageXIcon, Resource::shared::gfx::appicon_ico);
  }
  if(request.target() == "/css/normalize.css")
  {
    return textCss(request, Resource::www::css::normalize_css);
  }
  if(request.target() == "/css/throttle.css")
  {
#ifdef SERVE_FROM_FS
    const auto css = readFile(www / "css" / "throttle.css");
    return css ? textCss(request, *css) : notFound(request);
#else
    return textCss(request, Resource::www::css::throttle_css);
#endif
  }
  if(request.target() == "/js/throttle.js")
  {
#ifdef SERVE_FROM_FS
    const auto js = readFile(www / "js" / "throttle.js");
    return js ? textJavaScript(request, *js) : notFound(request);
#else
    return textJavaScript(request, Resource::www::js::throttle_js);
#endif
  }
  if(request.target() == "/throttle")
  {
#ifdef SERVE_FROM_FS
    const auto html = readFile(www / "throttle.html");
    return html ? textHtml(request, *html) : notFound(request);
#else
    return textHtml(request, Resource::www::throttle_html);
#endif
  }
  if(target == "/version")
  {
    return textPlain(request, TRAINTASTIC_VERSION_FULL);
  }
  if(startsWith(target, "/manual"))
  {
    return serveFileFromFileSystem(
      request,
      stripPrefix(target, "/manual"),
      m_manualPath,
      manualAllowedExtensions);
  }
  return notFound(request);
}

bool Server::handleWebSocketUpgradeRequest(http::request<http::string_body>&& request, beast::tcp_stream& stream)
{
  if(request.target() == "/client")
  {
    return acceptWebSocketUpgradeRequest<ClientConnection>(std::move(request), stream);
  }
  if(request.target() == "/throttle")
  {
    return acceptWebSocketUpgradeRequest<WebThrottleConnection>(std::move(request), stream);
  }
  return false;
}

template<class T>
bool Server::acceptWebSocketUpgradeRequest(http::request<http::string_body>&& request, beast::tcp_stream& stream)
{
  namespace websocket = beast::websocket;

  beast::get_lowest_layer(stream).expires_never(); // disable HTTP timeout

  auto ws = std::make_shared<websocket::stream<beast::tcp_stream>>(std::move(stream));
  ws->set_option(websocket::stream_base::timeout::suggested(beast::role_type::server));
  ws->set_option(websocket::stream_base::decorator(
    [](websocket::response_type& response)
    {
      response.set(beast::http::field::server, serverHeader);
    }));

  ws->async_accept(request,
    [this, ws](beast::error_code ec)
    {
      if(!ec)
      {
        auto connection = std::make_shared<T>(*this, ws);
        connection->start();

        EventLoop::call(
          [this, connection]()
          {
            Log::log(connection->id, LogMessage::I1003_NEW_CONNECTION);
            m_connections.push_back(connection);
          });
      }
      else if(ec != boost::asio::error::operation_aborted)
      {
        Log::log(id, LogMessage::E1004_TCP_ACCEPT_ERROR_X, ec.message());
      }
    });

  return true;
}

1	/**
2	* This file is part of Traintastic,
3	* see <https://github.com/traintastic/traintastic>.
4	*
5	* Copyright (C) 2022-2026 Reinder Feenstra
6	*
7	* This program is free software; you can redistribute it and/or
8	* modify it under the terms of the GNU General Public License
9	* as published by the Free Software Foundation; either version 2
10	* of the License, or (at your option) any later version.
11	*
12	* This program is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* GNU General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License
18	* along with this program; if not, write to the Free Software
19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20	*/
21
22	#include "server.hpp"
23	#include <boost/beast/http/buffer_body.hpp>
24	#include <boost/beast/http/file_body.hpp>
25	#include <boost/url/url_view.hpp>
26	#include <boost/url/parse.hpp>
27	#include <span>
28	#include <traintastic/network/message.hpp>
29	#include <traintastic/utils/standardpaths.hpp>
30	#include <version.hpp>
31	#include "clientconnection.hpp"
32	#include "httpconnection.hpp"
33	#include "webthrottleconnection.hpp"
34	#include "../core/eventloop.hpp"
35	#include "../log/log.hpp"
36	#include "../log/logmessageexception.hpp"
37	#include "../utils/endswith.hpp"
38	#include "../utils/setthreadname.hpp"
39	#include "../utils/startswith.hpp"
40	#include "../utils/stripprefix.hpp"
41
42	//#define SERVE_FROM_FS // Development option, NOT for production!
43	#ifdef SERVE_FROM_FS
44	#include "../utils/readfile.hpp"
45
46	static const auto www = std::filesystem::absolute(std::filesystem::path(__FILE__).parent_path() / ".." / ".." / "www");
47	#else
48	#include <resource/www/throttle.html.hpp>
49	#include <resource/www/css/throttle.css.hpp>
50	#include <resource/www/js/throttle.js.hpp>
51	#endif
52	#include <resource/www/css/normalize.css.hpp>
53	#include <resource/shared/gfx/appicon.ico.hpp>
54
55	#define IS_SERVER_THREAD (std::this_thread::get_id() == m_threadId)
56
57	namespace beast = boost::beast;
58	namespace http = beast::http;
59
60	namespace
61	{
62
63	static constexpr std::string_view serverHeader{"Traintastic-server/" TRAINTASTIC_VERSION_FULL};
64	static constexpr std::string_view contentTypeTextPlain{"text/plain"};
65	static constexpr std::string_view contentTypeTextHtml{"text/html"};
66	static constexpr std::string_view contentTypeTextCss{"text/css"};
67	static constexpr std::string_view contentTypeTextJavaScript{"text/javascript"};
68	static constexpr std::string_view contentTypeImageXIcon{"image/x-icon"};
69	static constexpr std::string_view contentTypeImagePng{"image/png"};
70	static constexpr std::string_view contentTypeApplicationGzip{"application/gzip"};
71	static constexpr std::string_view contentTypeApplicationJson{"application/json"};
72	static constexpr std::string_view contentTypeApplicationXml{"application/xml"};
73
74	static constexpr std::array<std::string_view, 7> manualAllowedExtensions{{
75	".html",
76	".css",
77	".js",
78	".json",
79	".png",
80	".xml",
81	".xml.gz",
82	}};
83
84	std::string_view getContentType(std::string_view filename)	×
85	{
86	if(endsWith(filename, ".html"))	×
87	{
88	return contentTypeTextHtml;	×
89	}
90	else if(endsWith(filename, ".png"))	×
91	{
92	return contentTypeImagePng;	×
93	}
94	else if(endsWith(filename, ".css"))	×
95	{
96	return contentTypeTextCss;	×
97	}
98	else if(endsWith(filename, ".js"))	×
99	{
100	return contentTypeTextJavaScript;	×
101	}
102	else if(endsWith(filename, ".json"))	×
103	{
104	return contentTypeApplicationJson;	×
105	}
106	else if(endsWith(filename, ".xml"))	×
107	{
108	return contentTypeApplicationXml;	×
109	}
110	else if(endsWith(filename, ".gz"))	×
111	{
112	return contentTypeApplicationGzip;	×
113	}
114	return {};	×
115	}
116
117	http::message_generator notFound(const http::request<http::string_body>& request)	×
118	{
119	http::response<http::string_body> response{http::status::not_found, request.version()};	×
120	response.set(http::field::server, serverHeader);	×
121	response.set(http::field::content_type, contentTypeTextPlain);	×
122	response.keep_alive(request.keep_alive());	×
123	response.body() = "404 Not Found";	×
124	response.prepare_payload();	×
125	return response;	×
126	}	×
127
128	http::message_generator methodNotAllowed(const http::request<http::string_body>& request, std::initializer_list<http::verb> allowedMethods)	×
129	{
130	std::string allow;	×
131	for(auto method : allowedMethods)	×
132	{
133	allow.append(http::to_string(method)).append(" ");	×
134	}
135	http::response<http::string_body> response{http::status::method_not_allowed, request.version()};	×
136	response.set(http::field::server, serverHeader);	×
137	response.set(http::field::content_type, contentTypeTextPlain);	×
138	response.set(http::field::allow, allow);	×
139	response.keep_alive(request.keep_alive());	×
140	response.body() = "405 Method Not Allowed";	×
141	response.prepare_payload();	×
142	return response;	×
143	}	×
144
145	http::message_generator binary(const http::request<http::string_body>& request, std::string_view contentType, std::span<const std::byte> body)	×
146	{
147	if(request.method() != http::verb::get && request.method() != http::verb::head)	×
148	{
149	return methodNotAllowed(request, {http::verb::get, http::verb::head});	×
150	}
151	http::response<http::buffer_body> response{http::status::ok, request.version()};	×
152	response.set(http::field::server, serverHeader);	×
153	response.set(http::field::content_type, contentType);	×
154	response.keep_alive(request.keep_alive());	×
155	if(request.method() == http::verb::head)	×
156	{
157	response.content_length(body.size());	×
158	}
159	else
160	{
161	response.body().data = const_cast<std::byte*>(body.data());	×
162	response.body().size = body.size();	×
163	}
164	response.body().more = false;	×
165	response.prepare_payload();	×
166	return response;	×
167	}	×
168
169	http::message_generator text(const http::request<http::string_body>& request, std::string_view contentType, std::string_view body)	×
170	{
171	if(request.method() != http::verb::get && request.method() != http::verb::head)	×
172	{
173	return methodNotAllowed(request, {http::verb::get, http::verb::head});	×
174	}
175	http::response<http::string_body> response{http::status::ok, request.version()};	×
176	response.set(http::field::server, serverHeader);	×
177	response.set(http::field::content_type, contentType);	×
178	response.keep_alive(request.keep_alive());	×
179	if(request.method() == http::verb::head)	×
180	{
181	response.content_length(body.size());	×
182	}
183	else
184	{
185	response.body() = body;	×
186	}
187	response.prepare_payload();	×
188	return response;	×
189	}	×
190
191	http::message_generator textPlain(const http::request<http::string_body>& request, std::string_view body)	×
192	{
193	return text(request, contentTypeTextPlain, body);	×
194	}
195
196	http::message_generator textHtml(const http::request<http::string_body>& request, std::string_view body)	×
197	{
198	return text(request, contentTypeTextHtml, body);	×
199	}
200
201	http::message_generator textCss(const http::request<http::string_body>& request, std::string_view body)	×
202	{
203	return text(request, contentTypeTextCss, body);	×
204	}
205
206	http::message_generator textJavaScript(const http::request<http::string_body>& request, std::string_view body)	×
207	{
208	return text(request, contentTypeTextJavaScript, body);	×
209	}
210
211	http::message_generator serveFileFromFileSystem(const http::request<http::string_body>& request, std::string_view target, const std::filesystem::path& root, std::span<const std::string_view> allowedExtensions)	×
212	{
213	if(request.method() != http::verb::get && request.method() != http::verb::head)	×
214	{
215	return methodNotAllowed(request, {http::verb::get, http::verb::head});	×
216	}
217
218	if(const auto url = boost::urls::parse_origin_form(target))	×
219	{
220	const std::filesystem::path path = std::filesystem::weakly_canonical(root / url->path().substr(1));	×
221
222	if(std::mismatch(path.begin(), path.end(), root.begin(), root.end()).second == root.end() && std::filesystem::exists(path))	×
223	{
224	const auto filename = path.string();	×
225
226	if(endsWith(filename, allowedExtensions))	×
227	{
228	http::file_body::value_type file;	×
229	boost::system::error_code ec;	×
230
231	file.open(filename.c_str(), boost::beast::file_mode::scan, ec);	×
232	if(!ec)	×
233	{
234	http::response<http::file_body> response{
235	std::piecewise_construct,
236	std::make_tuple(std::move(file)),	×
237	std::make_tuple(http::status::ok, request.version())};	×
238
239	response.set(http::field::server, serverHeader);	×
240	response.set(http::field::content_type, getContentType(filename));	×
241	response.content_length(file.size());	×
242	response.keep_alive(request.keep_alive());	×
243
244	if(request.method() == http::verb::head)	×
245	{
246	response.body().close(); // don’t send file contents	×
247	}
248
249	return response;	×
250	}	×
251	}	×
252	}	×
253	}	×
254
255	return notFound(request);	×
256	}
257
258	}
259
260	Server::Server(bool localhostOnly, uint16_t port, bool discoverable)	×
261	: m_ioContext{1}	×
262	, m_acceptor{m_ioContext}	×
263	, m_socketUDP{m_ioContext}	×
264	, m_localhostOnly{localhostOnly}	×
265	, m_manualPath{getManualPath()}	×
266	{
267	assert(isEventLoopThread());	×
268
269	boost::system::error_code ec;	×
270	boost::asio::ip::tcp::endpoint endpoint(localhostOnly ? boost::asio::ip::address_v4::loopback() : boost::asio::ip::address_v4::any(), port);	×
271
272	m_acceptor.open(endpoint.protocol(), ec);	×
273	if(ec)	×
274	throw LogMessageException(LogMessage::F1001_OPENING_TCP_SOCKET_FAILED_X, ec);	×
275
276	m_acceptor.set_option(boost::asio::socket_base::reuse_address(true), ec);	×
277	if(ec)	×
278	throw LogMessageException(LogMessage::F1002_TCP_SOCKET_ADDRESS_REUSE_FAILED_X, ec);	×
279
280	m_acceptor.bind(endpoint, ec);	×
281	if(ec)	×
282	throw LogMessageException(LogMessage::F1003_BINDING_TCP_SOCKET_FAILED_X, ec);	×
283
284	m_acceptor.listen(5, ec);	×
285	if(ec)	×
286	throw LogMessageException(LogMessage::F1004_TCP_SOCKET_LISTEN_FAILED_X, ec);	×
287
288	if(discoverable)	×
289	{
290	if(port == defaultPort)	×
291	{
292	m_socketUDP.open(boost::asio::ip::udp::v4(), ec);	×
293	if(ec)	×
294	throw LogMessageException(LogMessage::F1005_OPENING_UDP_SOCKET_FAILED_X, ec);	×
295
296	m_socketUDP.set_option(boost::asio::socket_base::reuse_address(true), ec);	×
297	if(ec)	×
298	throw LogMessageException(LogMessage::F1006_UDP_SOCKET_ADDRESS_REUSE_FAILED_X, ec);	×
299
300	m_socketUDP.bind(boost::asio::ip::udp::endpoint(boost::asio::ip::address_v4::any(), defaultPort), ec);	×
301	if(ec)	×
302	throw LogMessageException(LogMessage::F1007_BINDING_UDP_SOCKET_FAILED_X, ec);	×
303
304	Log::log(id, LogMessage::N1005_DISCOVERY_ENABLED);	×
305	}
306	else
307	{
308	Log::log(id, LogMessage::W1001_DISCOVERY_DISABLED_ONLY_ALLOWED_ON_PORT_X, defaultPort);	×
309	discoverable = false;	×
310	}
311	}
312	else
313	Log::log(id, LogMessage::N1006_DISCOVERY_DISABLED);	×
314
315	Log::log(id, LogMessage::N1007_LISTENING_AT_X_X, m_acceptor.local_endpoint().address().to_string(), m_acceptor.local_endpoint().port());	×
316
317	m_ioContext.post(	×
318	[this, discoverable]()	×
319	{
320	if(discoverable)	×
321	doReceive();	×
322
323	doAccept();	×
324	});	×
325
NEW 326	m_thread = std::thread(	×
NEW 327	[this]()	×
328	{
329	#ifndef NDEBUG
NEW 330	m_threadId = std::this_thread::get_id();	×
331	#endif
NEW 332	setThreadName("server");	×
NEW 333	m_ioContext.run();	×
NEW 334	});	×
UNCOV 335	}	×
336
337	Server::~Server()	×
338	{
339	assert(isEventLoopThread());	×
340
341	if(!m_ioContext.stopped())	×
342	{
NEW 343	for(const auto& connection : m_connections)	×
344	{
NEW 345	connection->disconnect();	×
346	}
347
348	m_ioContext.post(	×
349	[this]()	×
350	{
351	boost::system::error_code ec;	×
352	if(m_acceptor.cancel(ec))	×
353	Log::log(id, LogMessage::E1008_SOCKET_ACCEPTOR_CANCEL_FAILED_X, ec);	×
354
355	m_acceptor.close();	×
356
357	m_socketUDP.close();	×
358	});	×
359	}
360
361	if(m_thread.joinable())	×
362	m_thread.join();	×
UNCOV 363	}	×
364
365	void Server::connectionGone(const std::shared_ptr<WebSocketConnection>& connection)	×
366	{
367	assert(isEventLoopThread());	×
368
369	m_connections.erase(std::find(m_connections.begin(), m_connections.end(), connection));	×
370	}	×
371
372	void Server::doReceive()	×
373	{
374	assert(IS_SERVER_THREAD);	×
375
376	m_socketUDP.async_receive_from(boost::asio::buffer(m_udpBuffer), m_remoteEndpoint,	×
377	[this](const boost::system::error_code& ec, std::size_t bytesReceived)	×
378	{
379	if(!ec)	×
380	{
381	if(bytesReceived == sizeof(Message::Header))	×
382	{
383	Message message(reinterpret_cast<Message::Header>(m_udpBuffer.data()));	×
384
385	if(!m_localhostOnly \|\| m_remoteEndpoint.address().is_loopback())	×
386	{
387	if(message.dataSize() == 0)	×
388	{
389	std::unique_ptr<Message> response = processMessage(message);	×
390	if(response)	×
391	{
392	m_socketUDP.async_send_to(boost::asio::buffer(**response, response->size()), m_remoteEndpoint,	×
393	[this](const boost::system::error_code& /ec/, std::size_t /bytesTransferred/)	×
394	{
395	doReceive();	×
396	});	×
397	return;	×
398	}
399	}	×
400	}
401	}	×
402	doReceive();	×
403	}
NEW 404	else if(ec != boost::asio::error::operation_aborted)	×
405	{
UNCOV 406	Log::log(id, LogMessage::E1003_UDP_RECEIVE_ERROR_X, ec.message());	×
407	}
408	});
409	}	×
410
411	std::unique_ptr<Message> Server::processMessage(const Message& message)	×
412	{
413	if(message.command() == Message::Command::Discover && message.isRequest())	×
414	{
415	std::unique_ptr<Message> response = Message::newResponse(message.command(), message.requestId());	×
416	response->write(boost::asio::ip::host_name());	×
417	response->write<uint16_t>(TRAINTASTIC_VERSION_MAJOR);	×
418	response->write<uint16_t>(TRAINTASTIC_VERSION_MINOR);	×
419	response->write<uint16_t>(TRAINTASTIC_VERSION_PATCH);	×
420	assert(response->size() <= 1500); // must fit in a UDP packet	×
421	return response;	×
422	}	×
423
424	return {};	×
425	}
426
427	void Server::doAccept()	×
428	{
429	assert(IS_SERVER_THREAD);	×
430
431	m_acceptor.async_accept(	×
432	[this](boost::system::error_code ec, boost::asio::ip::tcp::socket socket)	×
433	{
434	if(!ec)	×
435	{
436	std::make_shared<HTTPConnection>(shared_from_this(), std::move(socket))->start();	×
437
438	doAccept();	×
439	}
NEW 440	else if(ec != boost::asio::error::operation_aborted)	×
441	{
442	Log::log(id, LogMessage::E1004_TCP_ACCEPT_ERROR_X, ec.message());	×
443	}
444	});	×
445	}	×
446
447	http::message_generator Server::handleHTTPRequest(http::request<http::string_body>&& request)	×
448	{
449	const auto target = request.target();	×
450	if(target == "/")	×
451	{
452	return textHtml(request,	×
453	"<!DOCTYPE html>"
454	"<html>"
455	"<head>"
456	"<meta charset=\"utf-8\">"
457	"<meta name=\"viewport\" content=\"width=device-width, initial-scale=1, shrink-to-fit=no\">"
458	"<title>Traintastic v" TRAINTASTIC_VERSION_FULL "</title>"
459	"</head>"
460	"<body>"
461	"<h1>Traintastic <small>v" TRAINTASTIC_VERSION_FULL "</small></h1>"
462	"<ul>"
463	"<li><a href=\"/manual/en/index.html\">Manual</a></li>"
464	"<li><a href=\"/throttle\">Web throttle</a></li>"
465	"</ul>"
466	"</body>"
467	"</html>");	×
468	}
469	if(target == "/favicon.ico")	×
470	{
471	return binary(request, contentTypeImageXIcon, Resource::shared::gfx::appicon_ico);	×
472	}
473	if(request.target() == "/css/normalize.css")	×
474	{
475	return textCss(request, Resource::www::css::normalize_css);	×
476	}
477	if(request.target() == "/css/throttle.css")	×
478	{
479	#ifdef SERVE_FROM_FS
480	const auto css = readFile(www / "css" / "throttle.css");
481	return css ? textCss(request, *css) : notFound(request);
482	#else
483	return textCss(request, Resource::www::css::throttle_css);	×
484	#endif
485	}
486	if(request.target() == "/js/throttle.js")	×
487	{
488	#ifdef SERVE_FROM_FS
489	const auto js = readFile(www / "js" / "throttle.js");
490	return js ? textJavaScript(request, *js) : notFound(request);
491	#else
492	return textJavaScript(request, Resource::www::js::throttle_js);	×
493	#endif
494	}
495	if(request.target() == "/throttle")	×
496	{
497	#ifdef SERVE_FROM_FS
498	const auto html = readFile(www / "throttle.html");
499	return html ? textHtml(request, *html) : notFound(request);
500	#else
501	return textHtml(request, Resource::www::throttle_html);	×
502	#endif
503	}
504	if(target == "/version")	×
505	{
506	return textPlain(request, TRAINTASTIC_VERSION_FULL);	×
507	}
508	if(startsWith(target, "/manual"))	×
509	{
510	return serveFileFromFileSystem(
511	request,
512	stripPrefix(target, "/manual"),	×
513	m_manualPath,	×
514	manualAllowedExtensions);	×
515	}
516	return notFound(request);	×
517	}
518
519	bool Server::handleWebSocketUpgradeRequest(http::request<http::string_body>&& request, beast::tcp_stream& stream)	×
520	{
521	if(request.target() == "/client")	×
522	{
523	return acceptWebSocketUpgradeRequest<ClientConnection>(std::move(request), stream);	×
524	}
525	if(request.target() == "/throttle")	×
526	{
527	return acceptWebSocketUpgradeRequest<WebThrottleConnection>(std::move(request), stream);	×
528	}
529	return false;	×
530	}
531
532	template<class T>
533	bool Server::acceptWebSocketUpgradeRequest(http::request<http::string_body>&& request, beast::tcp_stream& stream)	×
534	{
535	namespace websocket = beast::websocket;
536
537	beast::get_lowest_layer(stream).expires_never(); // disable HTTP timeout	×
538
539	auto ws = std::make_shared<websocket::stream<beast::tcp_stream>>(std::move(stream));	×
540	ws->set_option(websocket::stream_base::timeout::suggested(beast::role_type::server));	×
541	ws->set_option(websocket::stream_base::decorator(	×
542	[](websocket::response_type& response)	×
543	{
544	response.set(beast::http::field::server, serverHeader);	×
545	}));
546
547	ws->async_accept(request,	×
548	[this, ws](beast::error_code ec)	×
549	{
550	if(!ec)	×
551	{
552	auto connection = std::make_shared<T>(*this, ws);	×
553	connection->start();	×
554
555	EventLoop::call(	×
556	[this, connection]()	×
557	{
558	Log::log(connection->id, LogMessage::I1003_NEW_CONNECTION);	×
559	m_connections.push_back(connection);	×
560	});
561	}	×
NEW 562	else if(ec != boost::asio::error::operation_aborted)	×
563	{
564	Log::log(id, LogMessage::E1004_TCP_ACCEPT_ERROR_X, ec.message());	×
565	}
566	});
567
568	return true;	×
569	}	×

traintastic / traintastic / 21101426787

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