server_https.hpp

#ifndef SERVER_HTTPS_HPP
#define	SERVER_HTTPS_HPP

#include "server_http.hpp"
#include <boost/asio/ssl.hpp>
#include <openssl/ssl.h>
#include <algorithm>

namespace SimpleWeb {
    typedef boost::asio::ssl::stream<boost::asio::ip::tcp::socket> HTTPS;    
    
    template<>
    class Server<HTTPS> : public ServerBase<HTTPS> {
        std::string session_id_context;
        bool set_session_id_context=false;
    public:
        DEPRECATED Server(unsigned short port, size_t thread_pool_size, const std::string& cert_file, const std::string& private_key_file,
                long timeout_request=5, long timeout_content=300,
                const std::string& verify_file=std::string()) : 
                Server(cert_file, private_key_file, verify_file) {
            config.port=port;
            config.thread_pool_size=thread_pool_size;
            config.timeout_request=timeout_request;
            config.timeout_content=timeout_content;
        }
        
        Server(const std::string& cert_file, const std::string& private_key_file, const std::string& verify_file=std::string()):
                ServerBase<HTTPS>::ServerBase(443), context(boost::asio::ssl::context::tlsv12) {
            context.use_certificate_chain_file(cert_file);
            context.use_private_key_file(private_key_file, boost::asio::ssl::context::pem);
            
            if(verify_file.size()>0) {
                context.load_verify_file(verify_file);
                context.set_verify_mode(boost::asio::ssl::verify_peer | boost::asio::ssl::verify_fail_if_no_peer_cert |
                                        boost::asio::ssl::verify_client_once);
                set_session_id_context=true;
            }
        }
        
        void start() {
            if(set_session_id_context) {
                // Creating session_id_context from address:port but reversed due to small SSL_MAX_SSL_SESSION_ID_LENGTH
                session_id_context=std::to_string(config.port)+':';
                session_id_context.append(config.address.rbegin(), config.address.rend());
                SSL_CTX_set_session_id_context(context.native_handle(), reinterpret_cast<const unsigned char*>(session_id_context.data()),
                                               std::min<size_t>(session_id_context.size(), SSL_MAX_SSL_SESSION_ID_LENGTH));
            }
            ServerBase::start();
        }

    protected:
        boost::asio::ssl::context context;
        
        void accept() {
            //Create new socket for this connection
            //Shared_ptr is used to pass temporary objects to the asynchronous functions
            auto socket=std::make_shared<HTTPS>(*io_service, context);

            acceptor->async_accept((*socket).lowest_layer(), [this, socket](const boost::system::error_code& ec) {
                //Immediately start accepting a new connection (if io_service hasn't been stopped)
                if (ec != boost::asio::error::operation_aborted)
                    accept();

                
                if(!ec) {
                    boost::asio::ip::tcp::no_delay option(true);
                    socket->lowest_layer().set_option(option);
                    
                    //Set timeout on the following boost::asio::ssl::stream::async_handshake
                    auto timer=get_timeout_timer(socket, config.timeout_request);
                    socket->async_handshake(boost::asio::ssl::stream_base::server, [this, socket, timer]
                            (const boost::system::error_code& ec) {
                        if(timer)
                            timer->cancel();
                        if(!ec)
                            read_request_and_content(socket);
                        else if(on_error)
                            on_error(std::shared_ptr<Request>(new Request(*socket)), ec);
                    });
                }
                else if(on_error)
                    on_error(std::shared_ptr<Request>(new Request(*socket)), ec);
            });
        }
    };
}


#endif	/* SERVER_HTTPS_HPP */