server with basic hot reload

Makefile

@@ -27,9 +27,11 @@ run: build
 	@echo "-- running $(NAME)"
 	@$(BINARY)
 
+#BUILD_PARAMS = -trimpath
+
 build:
 	@echo "-- building $(NAME)"
-	@go build -o $(BINARY) $(ENTRY)
+	@go build $(BUILD_PARAMS) -o $(BINARY) $(ENTRY)  
 
 test:
 	@echo "-- testing $(NAME)"

cmd/root.go

@@ -14,4 +14,4 @@ var rootCmd = &cobra.Command{
 
 func Execute() error {
 	return rootCmd.Execute()
-}
+}

cmd/serve.go

@@ -1,36 +1,149 @@
 package cmd
 
 import (
+	"fmt"
 	"log/slog"
+	"net"
+	"net/http"
+	"time"
 
+	application "git.oblat.lv/alex/triggerssmith/internal/app"
 	"git.oblat.lv/alex/triggerssmith/internal/config"
 	"github.com/spf13/cobra"
 )
 
 var opts = struct {
 	ConfigPath *string
-	Debug     *bool
+	Debug      *bool
 }{}
 
+// simple middleware for request logging
+func loggingMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		start := time.Now()
+
+		slog.Info("HTTP request",
+			slog.String("method", r.Method),
+			slog.String("path", r.URL.Path),
+			slog.String("remote", r.RemoteAddr),
+		)
+
+		next.ServeHTTP(w, r)
+
+		slog.Debug("HTTP request finished",
+			slog.String("method", r.Method),
+			slog.String("path", r.URL.Path),
+			slog.Duration("latency", time.Since(start)),
+		)
+	})
+}
 
 var serveCmd = &cobra.Command{
 	Use:   "serve",
 	Short: "Start the server",
 	Run: func(cmd *cobra.Command, args []string) {
+		// defer func() {
+		// 	if r := recover(); r != nil {
+		// 		slog.Error("Application panicked", slog.Any("error", r))
+		// 	}
+		// }()
+		// configure logger
 		if *opts.Debug {
-			slog.SetDefault(slog.New(slog.NewTextHandler(cmd.OutOrStdout(), &slog.HandlerOptions{Level: slog.LevelDebug})))
+			slog.SetDefault(slog.New(slog.NewTextHandler(cmd.OutOrStdout(), &slog.HandlerOptions{Level: slog.LevelDebug, AddSource: true})))
 		} else {
 			slog.SetDefault(slog.New(slog.NewTextHandler(cmd.OutOrStdout(), &slog.HandlerOptions{Level: slog.LevelInfo})))
 		}
+
 		slog.Debug("Starting server")
+
+		// load config
 		slog.Debug("Reading configuration", slog.String("path", *opts.ConfigPath))
-		config, err := config.LoadConfig(*opts.ConfigPath)
+		cfg, err := config.LoadConfig(*opts.ConfigPath)
 		if err != nil {
 			slog.Error("Failed to load configuration", slog.String("path", *opts.ConfigPath), slog.String("error", err.Error()))
 			return
 		}
-		slog.Debug("Configuration loaded", slog.Any("config", config))
+		slog.Debug("Configuration loaded", slog.Any("config", cfg))
-		slog.Info("Server started", slog.Int("port", config.Server.Port), slog.String("address", config.Server.Addr))
+
+		// init app
+		app, err := application.NewApp()
+		if err != application.ErrNilPointerWarn && err != nil {
+			slog.Error("Failed to create app instance", slog.String("error", err.Error()))
+			return
+		}
+		app.LoadConfiguration(cfg)
+
+		/*
+			// setup handlers
+			mux := http.NewServeMux()
+
+			// static files
+			staticPath := cfg.Server.StaticFilesPath
+			slog.Debug("Setting up static file server", slog.String("path", staticPath))
+			fs := http.FileServer(http.Dir(staticPath))
+			mux.Handle("/static/", http.StripPrefix("/static/", fs))
+			handler := loggingMiddleware(mux)
+		*/
+
+		// start server
+		/*addr := fmt.Sprintf("%s:%d", cfg.Server.Addr, cfg.Server.Port)
+		slog.Debug("Binding listener", slog.String("address", addr))
+
+		ln, err := net.Listen("tcp", addr)
+		if err != nil {
+			slog.Error("Failed to start listener", slog.String("address", addr), slog.String("error", err.Error()))
+			return
+		}
+
+		srv := &http.Server{
+			Addr:    addr,
+			Handler: handler,
+		}
+
+		slog.Info("Server started", slog.String("address", addr))
+
+		if err := srv.Serve(ln); err != nil && err != http.ErrServerClosed {
+			slog.Error("HTTP server stopped with error", slog.String("error", err.Error()))
+		}*/
+
+		server := app.Server()
+		mux := http.NewServeMux()
+
+		// static files
+		staticPath := cfg.Server.StaticFilesPath
+		slog.Debug("Setting up static file server", slog.String("path", staticPath))
+		fs := http.FileServer(http.Dir(staticPath))
+		mux.Handle("/static/", http.StripPrefix("/static/", fs))
+		handler := loggingMiddleware(mux)
+
+		server.SetHandler(handler)
+		server.Init()
+
+		var addr = net.JoinHostPort(cfg.Server.Addr, fmt.Sprintf("%d", cfg.Server.Port))
+		slog.Debug("Binding listener", slog.String("address", addr))
+		err = server.Start(addr)
+		if err != nil {
+			slog.Error("Failed to start server", slog.String("error", err.Error()))
+			return
+		} else {
+			slog.Info("Server started", slog.String("address", net.JoinHostPort(cfg.Server.Addr, fmt.Sprintf("%d", cfg.Server.Port))))
+		}
+
+		for true {
+			fmt.Scanln()
+			if err := config.ReloadConfig(cfg); err != nil {
+				slog.Error("Failed to reload configuration", slog.String("error", err.Error()))
+			} else {
+				slog.Info("Configuration reloaded", slog.Any("config", cfg))
+				var addr = net.JoinHostPort(cfg.Server.Addr, fmt.Sprintf("%d", cfg.Server.Port))
+				err = server.Reload(addr)
+				if err != nil {
+					slog.Error("Failed to restart server with new configuration", slog.String("error", err.Error()))
+				} else {
+					slog.Info("Server restarted with new configuration", slog.String("address", net.JoinHostPort(cfg.Server.Addr, fmt.Sprintf("%d", cfg.Server.Port))))
+				}
+			}
+		}
 	},
 }
 

config.yaml

@@ -1,2 +1,3 @@
 server:
-  addr: "0.0.0.0"
+  address: "0.0.0.0"
+  port: 8089

go.mod

@@ -11,6 +11,9 @@ require (
 	github.com/fsnotify/fsnotify v1.9.0 // indirect
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/mattn/go-sqlite3 v1.14.22 // indirect
 	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
 	github.com/sagikazarmark/locafero v0.11.0 // indirect
 	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
@@ -22,4 +25,6 @@ require (
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/sys v0.29.0 // indirect
 	golang.org/x/text v0.28.0 // indirect
+	gorm.io/driver/sqlite v1.6.0 // indirect
+	gorm.io/gorm v1.31.1 // indirect
 )

go.sum

@@ -13,10 +13,16 @@ github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
+github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
+github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
 github.com/pelletier/go-toml/v2 v2.2.4 h1:mye9XuhQ6gvn5h28+VilKrrPoQVanw5PMw/TB0t5Ec4=
 github.com/pelletier/go-toml/v2 v2.2.4/go.mod h1:2gIqNv+qfxSVS7cM2xJQKtLSTLUE9V8t9Stt+h56mCY=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -54,3 +60,7 @@ gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogR
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gorm.io/driver/sqlite v1.6.0 h1:WHRRrIiulaPiPFmDcod6prc4l2VGVWHz80KspNsxSfQ=
+gorm.io/driver/sqlite v1.6.0/go.mod h1:AO9V1qIQddBESngQUKWL9yoH93HIeA1X6V633rBwyT8=
+gorm.io/gorm v1.31.1 h1:7CA8FTFz/gRfgqgpeKIBcervUn3xSyPUmr6B2WXJ7kg=
+gorm.io/gorm v1.31.1/go.mod h1:XyQVbO2k6YkOis7C2437jSit3SsDK72s7n7rsSHd+Gs=

internal/app/app.go

@@ -1,6 +1,38 @@
 package app
 
+import (
+	"sync/atomic"
+
+	"git.oblat.lv/alex/triggerssmith/internal/config"
+	"git.oblat.lv/alex/triggerssmith/internal/server"
+)
 
 type App struct {
-	// Application state and configurations can be added here
+	configuration atomic.Value // *config.Config
-}
+	ls            *server.LiveServer
+}
+
+// NewApp creates a new instance of the App struct. Always returns ErrNilPointerWarn.
+func NewApp() (*App, error) {
+	app := &App{}
+	return app, ErrNilPointerWarn
+}
+
+func (a *App) LoadConfiguration(cfg *config.Config) {
+	a.configuration.Store(cfg)
+}
+
+func (a *App) Configuration() *config.Config {
+	cfg := a.configuration.Load()
+	if cfg == nil {
+		return nil
+	}
+	return cfg.(*config.Config)
+}
+
+func (a *App) Server() *server.LiveServer {
+	if a.ls == nil {
+		a.ls, _ = server.Create("main_server")
+	}
+	return a.ls
+}

internal/app/errors.go

@@ -6,4 +6,4 @@ import (
 
 var (
 	ErrNilPointerWarn = errors.New("nil pointer dereference warning")
-)
+)

internal/config/config.go

@@ -1,26 +1,43 @@
 package config
 
 import (
+	"sync/atomic"
+
 	"github.com/akyaiy/GSfass/core/config"
 )
 
 type ServerConfig struct {
-	Port int `mapstructure:"port"`
+	Port            int    `mapstructure:"port"`
-	Addr string `mapstructure:"address"`
+	Addr            string `mapstructure:"address"`
+	StaticFilesPath string `mapstructure:"static_dir"`
+	LogPath         string `mapstructure:"log_path"`
 }
 
 type Config struct {
 	Server ServerConfig `mapstructure:"server"`
 }
 
+var configPath atomic.Value // string
+var defaults = map[string]any{
+	"server.port":       8080,
+	"server.address":    "127.0.0.0",
+	"server.static_dir": "./static",
+}
+
+func read(cfg *Config) error {
+	return config.Read().Config().FilePath(configPath.Load().(string)).SetBy(cfg).SetDefaults(defaults).End()
+}
+
 func LoadConfig(path string) (*Config, error) {
+	configPath.Store(path)
 	var cfg Config
-	err := config.Read().Config().FilePath(path).SetBy(&cfg).SetDefaults(map[string]any{
+	err := read(&cfg)
-		"server.port": 8080,
-		"server.address": "127.0.0.0",
-	}).End()
 	if err != nil {
 		return nil, err
 	}
 	return &cfg, nil
 }
+
+func ReloadConfig(cfg *Config) error {
+	return read(cfg)
+}

internal/safe/recover.go

@@ -0,0 +1,16 @@
+package safe
+
+import (
+	"fmt"
+)
+
+func SafeGO(fn func(), errs chan<- error) {
+	go func() {
+		defer func() {
+			if r := recover(); r != nil {
+				errs <- fmt.Errorf("panic: %v", r)
+			}
+		}()
+		fn()
+	}()
+}

internal/server/server.go

@@ -0,0 +1,465 @@
+// package server
+
+// import (
+// 	"context"
+// 	"fmt"
+// 	"log/slog"
+// 	"net"
+// 	"net/http"
+// 	"sync/atomic"
+// 	"time"
+
+// 	"git.oblat.lv/alex/triggerssmith/internal/config"
+// 	"git.oblat.lv/alex/triggerssmith/internal/safe"
+// )
+
+// type LiveServer struct {
+// 	current atomic.Value // *Server
+// }
+
+// type Server struct {
+// 	generalLogger *slog.Logger
+// 	cfg           *config.ServerConfig
+
+// 	srv *http.Server
+// 	ln  net.Listener
+// }
+
+// func (s *Server) GetConfig() *config.ServerConfig {
+// 	return s.cfg
+// }
+
+// func (ls *LiveServer) Start(cfg *config.ServerConfig, handler http.Handler) error {
+// 	slog.Debug("Starting new server", slog.Any("config", *cfg))
+// 	addr := fmt.Sprintf("%s:%d", cfg.Addr, cfg.Port)
+// 	ln, err := net.Listen("tcp", addr)
+// 	if err != nil {
+// 		return err
+// 	}
+// 	srv := &http.Server{
+// 		Handler: handler,
+// 	}
+// 	hs := &Server{
+// 		cfg: cfg,
+// 		ln:  ln,
+// 		srv: srv,
+// 	}
+// 	started := make(chan error, 1)
+// 	go func() {
+// 		err := srv.Serve(ln)
+// 		started <- err
+// 	}()
+
+// 	select {
+// 	case err := <-started:
+// 		return fmt.Errorf("cannot start server: %w", err)
+// 	case <-time.After(1 * time.Millisecond):
+// 	}
+
+// 	old := ls.current.Load()
+// 	ls.current.Store(hs)
+// 	if old != nil {
+// 		errorChan := make(chan error, 1)
+// 		safe.SafeGO(func() {
+// 			ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+// 			defer cancel()
+// 			old.(*Server).srv.Shutdown(ctx)
+// 		}, errorChan)
+// 		select {
+// 		case err := <-errorChan:
+// 			return err
+// 		case <-time.After(4 * time.Second):
+// 			return fmt.Errorf("timeout while shutting down old server")
+// 		}
+// 	}
+// 	return nil
+// }
+
+package server
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"net"
+	"net/http"
+	"sync"
+	"sync/atomic"
+)
+
+type LiveServer struct {
+	name string
+	data any // config, etc
+
+	handler http.Handler
+
+	active atomic.Value // *instance
+	mu sync.Mutex
+
+	statusMu sync.Mutex
+	status Status
+
+	initDone bool
+}
+
+type instance struct {
+	srv *http.Server
+	ln net.Listener
+
+	addr string
+}
+
+func Create(name string) (*LiveServer, error) {
+	if name == "" {
+		return nil, fmt.Errorf("server name is empty")
+	}
+
+	ls := &LiveServer{name: name}
+	ls.setStatus(Status{ID: StatusStopped})
+	return ls, nil
+}
+
+func (ls *LiveServer) setStatus(st Status) {
+	ls.statusMu.Lock()
+	defer ls.statusMu.Unlock()
+
+	ls.status = st
+}
+
+func (ls *LiveServer) Status() Status {
+	ls.statusMu.Lock()
+	defer ls.statusMu.Unlock()
+
+	return ls.status
+}
+
+func (ls *LiveServer) SetHandler(h http.Handler) {
+	ls.mu.Lock()
+	defer ls.mu.Unlock()
+
+	ls.handler = h
+}
+
+func (ls *LiveServer) listen(addr string) (net.Listener, error) {
+	slog.Debug("listening", slog.String("addr", addr))
+	ln, err := net.Listen("tcp", addr)
+	if err != nil {
+		slog.Debug("listening failed", slog.String("err", err.Error()))
+		return nil, err
+	}
+	return ln, nil
+}
+
+func (ls *LiveServer) serve(inst *instance) (chan error, error) {
+	slog.Debug("serving", slog.Any("instance", *inst))
+	errChan := make(chan error, 1)
+	if inst == nil {
+		err := fmt.Errorf("instance is nil")
+		slog.Debug("serving failed", slog.String("err", err.Error()))
+		return nil, err
+	}
+	srv := inst.srv
+	ln := inst.ln
+	go func() {
+		err := srv.Serve(ln)
+		errChan <- err
+	}()
+	return errChan, nil
+}
+
+func (ls *LiveServer) Init() error {
+	slog.Debug("initializating live server", slog.Any("liveserver", *ls))
+	ls.mu.Lock()
+	defer ls.mu.Unlock()
+	ls.setStatus(Status{ID: StatusInitializing})
+
+	if ls.handler == nil {
+		err := fmt.Errorf("handler not set")
+		slog.Debug("initializating failed", slog.String("err", err.Error()))
+		return err
+	}
+	ls.initDone = true
+	return nil
+}
+
+func (ls *LiveServer) Start(addr string) error {
+	slog.Debug("starting server", slog.String("addr", addr))
+
+	if !ls.initDone {
+		err := fmt.Errorf("server is not initialized")
+		slog.Debug("starting failed", slog.String("err", err.Error()))
+		return err
+	}
+	ls.setStatus(Status{ID: StatusStarting})
+
+	ln, err := ls.listen(addr)
+	if err != nil {
+		ls.setStatus(Status{ID: StatusError, Err: err})
+		return err
+	}
+	srv := &http.Server{Handler: ls.handler}
+	
+	ls.active.Store(&instance{
+		srv: srv,
+		ln:  ln,
+		addr: addr,
+	})
+
+	_, err = ls.serve(ls.active.Load().(*instance))
+	if err != nil {
+		ls.setStatus(Status{ID: StatusError, Err: err})
+		return err
+	}
+	ls.setStatus(Status{ID: StatusOK})
+
+	// go func() {
+	// 	err := <-errChan
+	// 	if err != nil && err != http.ErrServerClosed {
+	// 		ls.setStatus(Status{ID: StatusError, Err: err})
+	// 		slog.Error("Server stopped with error", slog.String("name", ls.name), slog.String("error", err.Error()))
+	// 		return
+	// 	}
+	// }()
+
+	slog.Debug("Server started", slog.String("name", ls.name), slog.String("address", addr))
+	return nil
+}
+
+func (ls *LiveServer) stop(inst *instance) error {
+	slog.Debug("stopping server")
+
+	instAny := ls.active.Load()
+	if instAny == nil {
+		return nil
+	}
+
+	inst.ln.Close()
+	err := inst.srv.Shutdown(context.Background())
+	if err != nil {
+		slog.Debug("shutdown", slog.String("err", err.Error()))
+	}
+	ls.setStatus(Status{ID: StatusStopped})
+
+	if err != http.ErrServerClosed {
+		return err
+	}
+	return nil
+}
+
+func (ls *LiveServer) Stop() error {
+	return ls.stop(ls.active.Load().(*instance))
+}
+
+
+func (ls *LiveServer) Reload(newAddr string) error {
+	ls.mu.Lock()
+	oldInstAny := ls.active.Load()
+	var oldAddr string
+	if oldInstAny != nil {
+		oldAddr = oldInstAny.(*instance).addr
+	}
+	ls.mu.Unlock()
+	
+	println("Old addr:", oldAddr, "New addr:", newAddr)
+	if oldAddr == newAddr {
+		return nil
+	}
+	slog.Debug("Reloading server", slog.String("name", ls.name), slog.String("new_address", newAddr))
+
+	ls.setStatus(Status{ID: StatusStarting})
+
+	slog.Debug("starting new server")
+	err := ls.Start(newAddr)
+	if err != nil {
+		ls.active.Store(oldInstAny)
+		return fmt.Errorf("cannot start new server: %w", err)
+	}
+
+	if err := ls.stop(oldInstAny.(*instance)); err != nil {
+		slog.Debug("stopping failed", slog.String("err", err.Error()))
+		return err
+	}
+
+	return nil
+}
+
+// package server
+
+// import (
+// 	"context"
+// 	"errors"
+// 	"fmt"
+// 	"log/slog"
+// 	"net"
+// 	"net/http"
+// 	"sync"
+// 	"sync/atomic"
+// 	"time"
+
+// 	"git.oblat.lv/alex/triggerssmith/internal/config"
+// )
+
+// type LiveServer struct {
+// 	name     string
+// 	handler  http.Handler
+// 	cfg      *config.Config
+
+// 	active   atomic.Value // *instance
+// 	mu       sync.Mutex   // защищает операции Start/Stop/Reload
+
+// 	statusMu sync.Mutex
+// 	status   Status
+// }
+
+// type instance struct {
+// 	srv *http.Server
+// 	ln  net.Listener
+// 	cfg *config.ServerConfig
+// }
+
+// func Create(name string) (*LiveServer, error) {
+// 	if name == "" {
+// 		return nil, errors.New("server name is empty")
+// 	}
+
+// 	ls := &LiveServer{name: name}
+// 	ls.setStatus(Status{ID: StatusStopped})
+// 	return ls, nil
+// }
+
+// func (ls *LiveServer) setStatus(st Status) {
+// 	ls.statusMu.Lock()
+// 	ls.status = st
+// 	ls.statusMu.Unlock()
+// }
+
+// func (ls *LiveServer) Status() Status {
+// 	ls.statusMu.Lock()
+// 	s := ls.status
+// 	ls.statusMu.Unlock()
+// 	return s
+// }
+
+// func (ls *LiveServer) LoadConfiguration(cfg *config.Config) {
+// 	ls.mu.Lock()
+// 	defer ls.mu.Unlock()
+
+// 	ls.cfg = cfg
+// }
+
+// func (ls *LiveServer) SetHandler(h http.Handler) {
+// 	ls.mu.Lock()
+// 	defer ls.mu.Unlock()
+
+// 	ls.handler = h
+// }
+
+// func (ls *LiveServer) Start() error {
+// 	ls.mu.Lock()
+// 	defer ls.mu.Unlock()
+
+// 	if ls.cfg == nil {
+// 		return errors.New("configuration not loaded")
+// 	}
+// 	if ls.handler == nil {
+// 		return errors.New("handler not set")
+// 	}
+
+// 	ln, err := net.Listen("tcp", fmt.Sprintf("%s:%d", ls.cfg.Server.Addr, ls.cfg.Server.Port))
+// 	if err != nil {
+// 		ls.setStatus(Status{ID: StatusError, Err: err})
+// 		return err
+// 	}
+
+// 	srv := &http.Server{Handler: ls.handler}
+
+// 	inst := &instance{
+// 		srv: srv,
+// 		ln:  ln,
+// 		cfg: &ls.cfg.Server,
+// 	}
+
+// 	ls.setStatus(Status{ID: StatusStarting})
+// 	ls.active.Store(inst)
+
+// 	go func() {
+// 		err := srv.Serve(ln)
+// 		if err != nil && err != http.ErrServerClosed {
+// 			ls.setStatus(Status{ID: StatusError, Err: err})
+// 			return
+// 		}
+// 	}()
+
+// 	// даём серверу время забиндиться
+// 	time.Sleep(5 * time.Millisecond)
+
+// 	ls.setStatus(Status{ID: StatusOK})
+// 	slog.Info("Server started", slog.String("name", ls.name), slog.String("address", fmt.Sprintf("%s:%d", ls.cfg.Server.Addr, ls.cfg.Server.Port)))
+// 	return nil
+// }
+
+// func (ls *LiveServer) Stop() error {
+// 	ls.mu.Lock()
+// 	defer ls.mu.Unlock()
+
+// 	instAny := ls.active.Load()
+// 	if instAny == nil {
+// 		return nil
+// 	}
+// 	inst := instAny.(*instance)
+
+// 	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+// 	defer cancel()
+
+// 	err := inst.srv.Shutdown(ctx)
+// 	inst.ln.Close()
+
+// 	ls.setStatus(Status{ID: StatusStopped})
+// 	return err
+// }
+
+// func (ls *LiveServer) Reload(newCfg *config.Config) error {
+// 	ls.mu.Lock()
+// 	defer ls.mu.Unlock()
+
+// 	oldInstAny := ls.active.Load()
+// 	var oldCfg *config.ServerConfig
+
+// 	if oldInstAny != nil {
+// 		oldCfg = oldInstAny.(*instance).cfg
+// 	}
+
+// 	if oldCfg != nil &&
+// 		oldCfg.Addr == newCfg.Server.Addr &&
+// 		oldCfg.Port == newCfg.Server.Port {
+// 		ls.cfg = newCfg
+// 		return nil
+// 	}
+
+// 	// ln, err := net.Listen("tcp", fmt.Sprintf("%s:%d", newCfg.Server.Addr, newCfg.Server.Port))
+// 	// if err != nil {
+// 	// 	return fmt.Errorf("cannot bind new address: %w", err)
+// 	// }
+// 	// srv := &http.Server{Handler: ls.handler}
+
+// 	// newInst := &instance{
+// 	// 	srv: srv,
+// 	// 	ln:  ln,
+// 	// 	cfg: &newCfg.Server,
+// 	// }
+
+// 	ls.setStatus(Status{ID: StatusStarting})
+	
+
+// 	err := ls.Start()
+// 	if err != nil {
+// 		ls.active.Store(oldInstAny)
+// 		return fmt.Errorf("cannot start new server: %w", err)
+// 	}
+
+// 	if err := ls.Stop(); err != nil {
+// 		return err
+// 	}
+
+// 	return nil
+// }

internal/server/status.go

@@ -0,0 +1,20 @@
+package server
+
+type StatusID int
+
+const (
+	StatusStopped StatusID = iota
+	StatusStarting
+	StatusOK
+	StatusError
+	StatusInitializing
+)
+
+type Status struct {
+	ID    StatusID
+	Err   error
+}
+
+func (s Status) Error() string {
+	return s.Err.Error()
+}

main.go

@@ -6,4 +6,4 @@ import (
 
 func main() {
 	cmd.Execute()
-}
+}

static/index.html

@@ -0,0 +1 @@
+Hiwqe