moved server code to internal/server

internal/server/Server.go

@@ -0,0 +1,59 @@
+package server
+
+import (
+	"net"
+	"serveg/internal/log"
+	"strconv"
+	"time"
+)
+
+func Serve(conf *Config) error {
+	logger := log.LoggerContext{Name: "server"}
+	addr := net.JoinHostPort(conf.Ip.String(), strconv.Itoa(int(conf.Port)))
+
+	logger.Info("listening at", addr)
+	srv, err := net.Listen("tcp", addr)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = srv.Close() }()
+
+	for i := int64(0); ; i++ {
+		conn, err := srv.Accept()
+		if err != nil {
+			logger.Warn(err)
+			continue
+		}
+		go handleConnection(conn, i)
+	}
+}
+
+func handleConnection(conn net.Conn, n int64) {
+	logger := log.LoggerContext{Name: "conn-" + strconv.FormatInt(n, 10)}
+	defer func() {
+		if r := recover(); r != nil {
+			logger.Error("panic: ", r)
+		}
+		_ = conn.Close()
+	}()
+
+	buf := make([]byte, 4096)
+
+	for {
+		if err := conn.SetDeadline(time.Now().Add(30 * time.Second)); err != nil {
+			logger.Warn(err)
+			break
+		}
+		n, err := conn.Read(buf)
+		if err != nil {
+			logger.Warn(err)
+			break
+		}
+		msgBytes := buf[:n]
+		logger.Info("msg: `", string(msgBytes), "`")
+		if _, err := conn.Write(msgBytes); err != nil {
+			logger.Warn(err)
+			break
+		}
+	}
+}