X-Git-Url: https://git.r.bdr.sh/rbdr/mobius/blobdiff_plain/0c0b2680077c1103609c87a652bcc2263460b1d7..3e20402491f013710dfa1c2f3d0cd6ab0e212585:/cmd/mobius-hotline-server/main.go

diff --git a/cmd/mobius-hotline-server/main.go b/cmd/mobius-hotline-server/main.go
index 772625b..66566cd 100644
--- a/cmd/mobius-hotline-server/main.go
+++ b/cmd/mobius-hotline-server/main.go
@@ -2,72 +2,213 @@ package main
 
 import (
 	"context"
+	"embed"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"github.com/jhalter/mobius/hotline"
-	"go.uber.org/zap"
-	"go.uber.org/zap/zapcore"
+	"gopkg.in/natefinch/lumberjack.v2"
+	"io"
+	"log"
+	"log/slog"
+	"net/http"
 	"os"
+	"path/filepath"
+	"runtime"
 )
 
-const (
-	defaultConfigPath = "/usr/local/var/mobius/config/" // matches Homebrew default config location
-	defaultPort       = 5500
+//go:embed mobius/config
+var cfgTemplate embed.FS
+
+const defaultPort = 5500
+
+var logLevels = map[string]slog.Level{
+	"debug": slog.LevelDebug,
+	"info":  slog.LevelInfo,
+	"error": slog.LevelError,
+}
+
+var (
+	version = "dev"
+	commit  = "none"
+	date    = "unknown"
 )
 
 func main() {
-	ctx, cancelRoot := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancel(context.Background())
 
-	basePort := flag.Int("bind", defaultPort, "Bind address and port")
-	configDir := flag.String("config", defaultConfigPath, "Path to config root")
-	version := flag.Bool("version", false, "print version and exit")
+	// TODO: implement graceful shutdown by closing context
+	// c := make(chan os.Signal, 1)
+	// signal.Notify(c, os.Interrupt)
+	// defer func() {
+	// 	signal.Stop(c)
+	// 	cancel()
+	// }()
+	// go func() {
+	// 	select {
+	// 	case <-c:
+	// 		cancel()
+	// 	case <-ctx.Done():
+	// 	}
+	// }()
+
+	netInterface := flag.String("interface", "", "IP addr of interface to listen on.  Defaults to all interfaces.")
+	basePort := flag.Int("bind", defaultPort, "Base Hotline server port.  File transfer port is base port + 1.")
+	statsPort := flag.String("stats-port", "", "Enable stats HTTP endpoint on address and port")
+	configDir := flag.String("config", defaultConfigPath(), "Path to config root")
+	printVersion := flag.Bool("version", false, "print version and exit")
 	logLevel := flag.String("log-level", "info", "Log level")
+	logFile := flag.String("log-file", "", "Path to log file")
+
+	init := flag.Bool("init", false, "Populate the config dir with default configuration")
+
 	flag.Parse()
 
-	if *version {
-		fmt.Printf("v%s\n", hotline.VERSION)
+	if *printVersion {
+		fmt.Printf("mobius-hotline-server %s, commit %s, built at %s", version, commit, date)
 		os.Exit(0)
 	}
 
-	zapLvl, ok := zapLogLevel[*logLevel]
-	if !ok {
-		fmt.Printf("Invalid log level %s.  Must be debug, info, warn, or error.\n", *logLevel)
-		os.Exit(0)
-	}
+	slogger := slog.New(
+		slog.NewTextHandler(
+			io.MultiWriter(os.Stdout, &lumberjack.Logger{
+				Filename:   *logFile,
+				MaxSize:    100, // MB
+				MaxBackups: 3,
+				MaxAge:     365, // days
+			}),
+			&slog.HandlerOptions{Level: logLevels[*logLevel]},
+		),
+	)
 
-	cores := []zapcore.Core{newStdoutCore(zapLvl)}
-	l := zap.New(zapcore.NewTee(cores...))
-	defer func() { _ = l.Sync() }()
-	logger := l.Sugar()
+	if *init {
+		if _, err := os.Stat(filepath.Join(*configDir, "/config.yaml")); os.IsNotExist(err) {
+			if err := os.MkdirAll(*configDir, 0750); err != nil {
+				slogger.Error(fmt.Sprintf("error creating config dir: %s", err))
+				os.Exit(1)
+			}
+
+			if err := copyDir("mobius/config", *configDir); err != nil {
+				slogger.Error(fmt.Sprintf("error copying config dir: %s", err))
+				os.Exit(1)
+			}
+			slogger.Info("Config dir initialized at " + *configDir)
+		} else {
+			slogger.Info("Existing config dir found.  Skipping initialization.")
+		}
+	}
 
 	if _, err := os.Stat(*configDir); os.IsNotExist(err) {
-		logger.Fatalw("Configuration directory not found", "path", configDir)
+		slogger.Error(fmt.Sprintf("Configuration directory not found.  Correct the path or re-run with -init to generate initial config."))
+		os.Exit(1)
 	}
 
-	srv, err := hotline.NewServer(*configDir, "", *basePort, logger)
+	srv, err := hotline.NewServer(*configDir, *netInterface, *basePort, slogger, &hotline.OSFileStore{})
 	if err != nil {
-		logger.Fatal(err)
+		slogger.Error(fmt.Sprintf("Error starting server: %s", err))
+		os.Exit(1)
 	}
 
+	sh := statHandler{hlServer: srv}
+	if *statsPort != "" {
+		http.HandleFunc("/", sh.RenderStats)
+
+		go func(srv *hotline.Server) {
+			// Use the default DefaultServeMux.
+			err = http.ListenAndServe(":"+*statsPort, nil)
+			if err != nil {
+				log.Fatal(err)
+			}
+		}(srv)
+	}
+
+	slogger.Info("Hotline server started",
+		"version", version,
+		"API port", fmt.Sprintf("%s:%v", *netInterface, *basePort),
+		"Transfer port", fmt.Sprintf("%s:%v", *netInterface, *basePort+1),
+	)
+
 	// Serve Hotline requests until program exit
-	logger.Fatal(srv.ListenAndServe(ctx, cancelRoot))
+	log.Fatal(srv.ListenAndServe(ctx, cancel))
 }
 
-func newStdoutCore(level zapcore.Level) zapcore.Core {
-	encoderCfg := zap.NewProductionEncoderConfig()
-	encoderCfg.TimeKey = "timestamp"
-	encoderCfg.EncodeTime = zapcore.ISO8601TimeEncoder
+type statHandler struct {
+	hlServer *hotline.Server
+}
 
-	return zapcore.NewCore(
-		zapcore.NewConsoleEncoder(encoderCfg),
-		zapcore.Lock(os.Stdout),
-		level,
-	)
+func (sh *statHandler) RenderStats(w http.ResponseWriter, _ *http.Request) {
+	u, err := json.Marshal(sh.hlServer.CurrentStats())
+	if err != nil {
+		panic(err)
+	}
+
+	_, _ = io.WriteString(w, string(u))
+}
+
+func defaultConfigPath() (cfgPath string) {
+	switch runtime.GOOS {
+	case "windows":
+		cfgPath = "config/"
+	case "darwin":
+		if _, err := os.Stat("/usr/local/var/mobius/config/"); err == nil {
+			cfgPath = "/usr/local/var/mobius/config/"
+		} else if _, err := os.Stat("/opt/homebrew/var/mobius/config"); err == nil {
+			cfgPath = "/opt/homebrew/var/mobius/config/"
+		}
+	case "linux":
+		cfgPath = "/usr/local/var/mobius/config/"
+	default:
+		cfgPath = "./config/"
+	}
+
+	return cfgPath
 }
 
-var zapLogLevel = map[string]zapcore.Level{
-	"debug": zap.DebugLevel,
-	"info":  zap.InfoLevel,
-	"warn":  zap.WarnLevel,
-	"error": zap.ErrorLevel,
+// TODO: Simplify this mess.  Why is it so difficult to recursively copy a directory?
+func copyDir(src, dst string) error {
+	entries, err := cfgTemplate.ReadDir(src)
+	if err != nil {
+		return err
+	}
+	for _, dirEntry := range entries {
+		if dirEntry.IsDir() {
+			if err := os.MkdirAll(filepath.Join(dst, dirEntry.Name()), 0777); err != nil {
+				panic(err)
+			}
+			subdirEntries, _ := cfgTemplate.ReadDir(filepath.Join(src, dirEntry.Name()))
+			for _, subDirEntry := range subdirEntries {
+				f, err := os.Create(filepath.Join(dst, dirEntry.Name(), subDirEntry.Name()))
+				if err != nil {
+					return err
+				}
+
+				srcFile, err := cfgTemplate.Open(filepath.Join(src, dirEntry.Name(), subDirEntry.Name()))
+				if err != nil {
+					return err
+				}
+				_, err = io.Copy(f, srcFile)
+				if err != nil {
+					return err
+				}
+				f.Close()
+			}
+		} else {
+			f, err := os.Create(filepath.Join(dst, dirEntry.Name()))
+			if err != nil {
+				return err
+			}
+
+			srcFile, err := cfgTemplate.Open(filepath.Join(src, dirEntry.Name()))
+			if err != nil {
+				return err
+			}
+			_, err = io.Copy(f, srcFile)
+			if err != nil {
+				return err
+			}
+			f.Close()
+		}
+	}
+
+	return nil
 }