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WIP: refactor server and proxy and remove gnet/v2
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,177 @@ | ||
| package network | ||
|
|
||
| import ( | ||
| "context" | ||
| "net" | ||
| "strconv" | ||
| "time" | ||
|
|
||
| "github.com/rs/zerolog" | ||
| ) | ||
|
|
||
| type Option struct { | ||
| Multicore bool | ||
| NumEventLoop int | ||
| // LB LoadBalancing | ||
| ReuseAddr bool | ||
| ReusePort bool | ||
| MulticastInterfaceIndex int | ||
| ReadBufferCap int | ||
| WriteBufferCap int | ||
| LockOSThread bool | ||
| Ticker bool | ||
| TCPKeepAlive time.Duration | ||
| TCPNoDelay TCPSocketOpt | ||
| SocketRecvBuffer int | ||
| SocketSendBuffer int | ||
| LogPath string | ||
| LogLevel zerolog.Level | ||
| Logger zerolog.Logger | ||
| } | ||
|
|
||
| type Action int | ||
|
|
||
| const ( | ||
| None Action = iota | ||
| Close | ||
| Shutdown | ||
| ) | ||
|
|
||
| type TCPSocketOpt int | ||
|
|
||
| const ( | ||
| TCPNoDelay TCPSocketOpt = iota | ||
| TCPDelay | ||
| ) | ||
|
|
||
| type Engine struct { | ||
| listener net.Listener | ||
| host string | ||
| port int | ||
| connections map[string]*net.Conn | ||
| bufferSize int | ||
| handler EventHandler | ||
| stopChannel chan struct{} | ||
| } | ||
|
|
||
| func (engine *Engine) CountConnections() int { | ||
| return len(engine.connections) | ||
| } | ||
|
|
||
| func (engine *Engine) Stop(ctx context.Context) error { | ||
| engine.stopChannel <- struct{}{} | ||
| return nil | ||
| } | ||
|
|
||
| type ( | ||
| EventHandler interface { | ||
| OnBoot(eng Engine) (action Action) | ||
| OnShutdown(eng Engine) | ||
| OnOpen(c net.Conn) (out []byte, action Action) | ||
| OnClose(c net.Conn, err error) (action Action) | ||
| OnTraffic(c net.Conn) (action Action) | ||
| OnTick() (delay time.Duration, action Action) | ||
| } | ||
|
|
||
| BuiltinEventEngine struct{} | ||
| ) | ||
|
|
||
| // Create a new TCP server. | ||
| func Run(network, address string, server *Server, opts ...Option) error { | ||
| engine := Engine{ | ||
| connections: make(map[string]*net.Conn), | ||
| stopChannel: make(chan struct{}), | ||
| } | ||
|
|
||
| if action := server.OnBoot(engine); action != None { | ||
| return nil | ||
| } | ||
| server.logger.Debug().Msg("Server booted") | ||
|
|
||
| if ln, err := net.Listen(network, address); err != nil { | ||
| server.logger.Error().Err(err).Msg("Failed to listen") | ||
| } else { | ||
| engine.listener = ln | ||
| } | ||
| defer engine.listener.Close() | ||
| server.logger.Debug().Str("address", engine.listener.Addr().String()).Msg("Server listening") | ||
|
|
||
| if engine.listener == nil { | ||
| server.logger.Error().Msg("Listener is nil") | ||
| return nil | ||
| } | ||
| server.logger.Debug().Msg("Server started") | ||
|
|
||
| if host, port, err := net.SplitHostPort(engine.listener.Addr().String()); err != nil { | ||
| server.logger.Error().Err(err).Msg("Failed to split host and port") | ||
| return err | ||
| } else { | ||
| engine.host = host | ||
| if engine.port, err = strconv.Atoi(port); err != nil { | ||
| server.logger.Error().Err(err).Msg("Failed to convert port to integer") | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| for { | ||
| // if <-engine.stopChannel == struct{}{} { | ||
| // server.logger.Debug().Msg("Server stopped") | ||
| // break | ||
| // } | ||
| server.logger.Debug().Msg("Server tick") | ||
|
|
||
| conn, err := engine.listener.Accept() | ||
| if err != nil { | ||
| server.logger.Error().Err(err).Msg("Failed to accept connection") | ||
| return err | ||
| } | ||
|
|
||
| server.logger.Debug().Str("address", conn.RemoteAddr().String()).Msg("Connection accepted") | ||
|
|
||
| if out, action := server.OnOpen(conn); action != None { | ||
| conn.Write(out) | ||
| conn.Close() | ||
| if action == Shutdown { | ||
| server.logger.Debug().Str("address", conn.RemoteAddr().String()).Msg( | ||
| "Connection closed") | ||
| return nil | ||
| } | ||
| } | ||
| server.logger.Debug().Str("address", conn.RemoteAddr().String()).Msg("Connection accepted") | ||
|
|
||
| // engine.connections[conn.RemoteAddr().String()] = &conn | ||
| go func(server *Server, conn net.Conn) { | ||
| // FIXME: DO WE NEED A FOR-LOOP HERE? | ||
| // for { | ||
| // if n, err := conn.Read([]byte{}); n == 0 && err != nil { | ||
| // return | ||
| // } | ||
| // if action := server.OnTraffic(conn); action == Close { | ||
| // if action := server.OnClose(conn, err); action == Close { | ||
| // conn.Close() | ||
| // break | ||
| // } | ||
| // } | ||
| if action := server.OnTraffic(conn); action == Close { | ||
| if action := server.OnClose(conn, err); action == Close { | ||
| // FIXME: this should be handled by the server | ||
| server.logger.Debug().Str("address", conn.RemoteAddr().String()).Msg( | ||
| "Connection closed") | ||
| conn.Close() | ||
| return | ||
| } | ||
| } | ||
| // time.Sleep(100 * time.Millisecond) | ||
| // } | ||
| }(server, conn) | ||
|
|
||
| // defer delete(engine.connections, conn.RemoteAddr().String()) | ||
|
|
||
| // if duration, action := server.OnTick(); action == Shutdown { | ||
| // return nil | ||
| // } else if duration > 0 { | ||
| // time.Sleep(duration) | ||
| // } | ||
| } | ||
| // engine.handler.OnShutdown(engine) | ||
| } |
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