HttpServer.h

Go to the documentation of this file.

/* Copyright 2013-2019 Homegear GmbH
 *
 * Homegear 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 3 of the
 * License, or (at your option) any later version.
 *
 * Homegear 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 Homegear.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU Lesser General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
*/

#ifndef HTTPSERVER_H_
#define HTTPSERVER_H_

#include "../Exception.h"
#include "../Managers/FileDescriptorManager.h"
#include "../Encoding/Http.h"
#include "TcpSocket.h"

#include <atomic>

namespace BaseLib {

class HttpServerException : public Exception {
 public:
  HttpServerException(std::string message) : Exception(message) {}
};

class HttpServer {
 public:
  struct HttpServerInfo {
    bool useSsl = false;
    uint32_t connectionBacklogSize = 100;
    uint32_t maxConnections = 10;
    uint32_t serverThreads = 1;
    std::unordered_map<std::string, TcpSocket::PCertificateInfo> certificates;
    std::string dhParamFile;
    std::string dhParamData;
    bool requireClientCert = false;

    std::function<void(int32_t clientId, std::string address, uint16_t port)> newConnectionCallback;
    std::function<void(int32_t clientId)> connectionClosedCallback;
    std::function<void(int32_t clientId, Http &http)> packetReceivedCallback;
  };

  HttpServer(BaseLib::SharedObjects *baseLib, HttpServerInfo &serverInfo);
  virtual ~HttpServer();

  void bind(std::string address, std::string port, std::string &listenAddress);

  void startPrebound(std::string &listenAddress, size_t processingThreads = 0);

  void start(std::string address, std::string port, std::string &listenAddress, size_t processingThreads = 0);
  void stop();
  void waitForStop();
  void reload();

  double GetPacketsPerMinuteReceived();
  double GetPacketsPerMinuteSent();
  double GetServerThreadLoad();
  double GetProcessingThreadLoad();
  double GetProcessingThreadLoadMax();

  void send(int32_t clientId, const TcpSocket::TcpPacket &packet, bool closeConnection = true);
  void send(int32_t clientId, const std::vector<char> &packet, bool closeConnection = true);

  std::string getClientCertDn(int32_t clientId);
  std::string getClientCertSerial(int32_t clientId);
  int64_t getClientCertExpiration(int32_t clientId);
 protected:
  struct HttpClientInfo {
    std::shared_ptr<Http> http;
  };

  BaseLib::SharedObjects *_bl = nullptr;
  std::shared_ptr<TcpSocket> _socket;

  std::mutex _httpClientInfoMutex;
  std::unordered_map<int32_t, HttpClientInfo> _httpClientInfo;

  std::function<void(int32_t clientId, std::string address, uint16_t port)> _newConnectionCallback;
  std::function<void(int32_t clientId)> _connectionClosedCallback;
  std::function<void(int32_t clientId, Http &http)> _packetReceivedCallback;

  void newConnection(int32_t clientId, std::string address, uint16_t port);
  void connectionClosed(int32_t clientId);
  void packetReceived(int32_t clientId, TcpSocket::TcpPacket &packet);
};

}
#endif