Boost Asio 实现的UDP异步监听和TCP异步发送程序
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http://blog.chinaunix.net/uid-24544542-id-176702.html
代码很粗糙，希望朋友们多多指正^&^ #include <boost/asio/deadline_timer.hpp> #include <boost/asio/io_service.hpp> #include <boost/asio/ip/tcp.hpp> #include <boost/asio/read_until.hpp> #include <boost/asio/streambuf.hpp> #include <boost/asio/write.hpp> #include <boost/asio.hpp> #include <boost/bind.hpp> #include <boost/shared_ptr.hpp> #include <boost/enable_shared_from_this.hpp> #include <iostream> #include "Message.hpp" #define MAXLEN 1024 #define SECONDS 5 using namespace std; using namespace ****; using namespace ****::Protocol; using boost::asio::deadline_timer; using boost::asio::ip::tcp; using boost::asio::ip::udp; class Session{ public: Session(boost::asio::io_service& io_service, const char *path, int port) :stopped_(false), socket_(io_service), command_(io_service, udp::endpoint(udp::v4(), port)), deadline_(io_service), heartbeat_timer_(io_service) { callback_ = new Callback(path); input_stream_ = new char[MAXLEN]; } ~Session(){ delete callback_; delete input_stream_; } void start(tcp::resolver::iterator endpoint_iter){ start_connect(endpoint_iter); deadline_.async_wait(boost::bind(&Session::check_deadline, this)); } void stop(){ stopped_ = true; socket_.close(); deadline_.cancel(); heartbeat_timer_.cancel(); } private: void start_connect(tcp::resolver::iterator endpoint_iter){ if(endpoint_iter != tcp::resolver::iterator()){ logs.write_log(NORMAL, "inof:Connect--->"); deadline_.expires_from_now(boost::posix_time::seconds(60)); socket_.async_connect(endpoint_iter->endpoint(), boost::bind(&Session::handle_connect, this, _1, endpoint_iter)); } else{ stop(); } } void handle_connect(const boost::system::error_code& ec, tcp::resolver::iterator endpoint_iter){ if(stopped_) return; if(!socket_.is_open()){ logs.write_log(NORMAL, "info:Connect time out"); start_connect(++endpoint_iter); } else if(ec){ logs.write_log(NORMAL, "info:Connect error"); socket_.close(); start_connect(++endpoint_iter); } else{ //logs.write_log(NORMAL, "info:Conected to %s ", endpoint_iter->endpoint()); logs.write_log(NORMAL, "info:Conected! "); start_read(); start_write_heartbeat(); start_delivery(); } } void start_read(){ deadline_.expires_from_now(boost::posix_time::seconds(SECONDS*6)); socket_.async_receive( boost::asio::buffer(&header_, HEADERLEN), boost::bind(&Session::handle_read_header, this, boost::asio::placeholders::error) ); } void handle_read_header(const boost::system::error_code& ec){ if(stopped_) return; if(!ec){ if(HEARTBEAT == header_.type){ logs.write_log(NORMAL, "info:Receive heartbeat message--->"); deadline_.expires_from_now(boost::posix_time::seconds(SECONDS*6)); //heartbeat_timer_.expires_from_now(boost::posix_time::seconds(SECONDS)); start_read(); } else if(PACKET == header_.type){ logs.write_log(NORMAL, "info:Receive packet message--->"); socket_.async_receive( boost::asio::buffer(input_stream_, header_.length), boost::bind(&Session::handle_read_body, this, boost::asio::placeholders::error) ); logs.write_log(NORMAL, "info:Receive %d bytes", header_.length); } } else{ logs.write_log(NORMAL, "Error on receive: %s", (ec.message()).c_str()); stop(); } } void handle_read_body(const boost::system::error_code& ec){ if(stopped_) return; if(!ec){ if(packet_message_.Parse(input_stream_, header_.length)){ Packet * packet = packet_message_.pack(); logs.write_log(NORMAL, "info:Receive data: %s", (packet->data()).c_str()); callback_->Write(packet); } start_read(); } else{ logs.write_log(NORMAL, "Error on receive: %s", (ec.message()).c_str()); stop(); } } void start_write_heartbeat(){ if(stopped_) return ; Header header; header.length = 0; header.type = HEARTBEAT; boost::asio::async_write(socket_, boost::asio::buffer(&header, HEADERLEN), boost::bind(&Session::handle_write_heartbeat, this, boost::asio::placeholders::error )); logs.write_log(NORMAL, "info:Send heartbeat message--->"); } void handle_write_heartbeat(const boost::system::error_code& ec){ if(stopped_) return ; if(!ec){ heartbeat_timer_.expires_from_now(boost::posix_time::seconds(SECONDS)); heartbeat_timer_.async_wait(boost::bind(&Session::start_write_heartbeat, this)); } else{ logs.write_log(NORMAL, "info:Error on heartbeat: %s ", (ec.message()).c_str()); stop(); } } void start_delivery(){ if(stopped_) return ; Configure * conf = conf_message_.conf(); Header header; conf->set_ip("10.14.2.40"); conf->set_conf("\\d+\\w+*"); conf->set_file("/tmp/aaa.txt"); conf->set_chars("hello world"); conf->set_offset(0); conf_message_.Serialize(); header.length = conf_message_.length(); header.type = CONFIG; socket_.async_send( boost::asio::buffer(&header, HEADERLEN), boost::bind(&Session::handle_write_config, this, boost::asio::placeholders::error) ); } void handle_write_config(const boost::system::error_code& ec){ if(stopped_) return ; if(!ec){ socket_.async_send( boost::asio::buffer(conf_message_.data(), conf_message_.length()), boost::bind(&Session::handle_wait_commander, this, boost::asio::placeholders::error) ); } } void handle_wait_commander(const boost::system::error_code& ec){ logs.write_log(NORMAL, "info:Waiting for the commander --->.."); /* *boost::bind(&Session::delivery--->.) * */ command_.async_receive_from( boost::asio::buffer(&commander_header_, HEADERLEN), receive_entpoint_, boost::bind(&Session::handle_check_commander, this, boost::asio::placeholders::error) ); } void handle_check_commander(const boost::system::error_code& ec){ if(DELIVERY == commander_header_.type || 8888 == commander_header_.length){ logs.write_log(NORMAL, "info:Receive a Command, delivery a Configure "); /* boost::bind(&Session::start_delivery, this, boost::asio::placeholders::error); */ start_delivery(); } else{ logs.write_log(NORMAL, "Error:Bad command format!"); } } void check_deadline() { if (stopped_) return; // Check whether the deadline has passed. We compare the deadline against // the current time since a new asynchronous operation may have moved the // deadline before this actor had a chance to run. if (deadline_.expires_at() <= deadline_timer::traits_type::now()) { // The deadline has passed. The socket is closed so that any outstanding // asynchronous operations are cancelled. socket_.close(); // There is no longer an active deadline. The expiry is set to positive // infinity so that the actor takes no action until a new deadline is set. deadline_.expires_at(boost::posix_time::pos_infin); } // Put the actor back to sleep. deadline_.async_wait(boost::bind(&Session::check_deadline, this)); } private: bool stopped_; tcp::socket socket_; udp::socket command_; udp::endpoint receive_entpoint_; Header header_; Header commander_header_; ConfigMessage conf_message_; DataMessage packet_message_; HeartbeatMessage heartbeat_message_; deadline_timer deadline_; deadline_timer heartbeat_timer_; Callback *callback_; char *input_stream_; }; int main(int argc, char* argv[]) { try { if (argc != 4) { std::cerr << "Usage: Session <host> <port> <udp-port>\n"; return 1; } boost::asio::io_service io_service; tcp::resolver r(io_service); const char * path = "/home/lidawei/Doc/file"; Session s(io_service, path, std::atoi(argv[3])); logs.write_log(NORMAL, "record file: %s", path); s.start(r.resolve(tcp::resolver::query(argv[1], argv[2]))); logs.write_log(NORMAL, "info:Session start--->"); io_service.run(); } catch (std::exception& e) { std::cerr << "Exception: " << e.what() << "\n"; } return 0; }编译：
g++ -Wall -g -I /usr/include/boost -L /usr/lib/boost easyzlib.o LogServer.pb.cc Message.cpp daemon.cpp Client.cpp -o Client -lboost_thread -lboost_system `pkg-config --cflags --libs protobuf`
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