git.r.bdr.sh - rbdr/mobius/blob - cmd/mobius-hotline-server/main.go

   1 package main
   2
   3 import (
   4         "context"
   5         "embed"
   6         "encoding/json"
   7         "flag"
   8         "fmt"
   9         "github.com/jhalter/mobius/hotline"
  10         "github.com/jhalter/mobius/internal/mobius"
  11         "gopkg.in/natefinch/lumberjack.v2"
  12         "io"
  13         "log"
  14         "log/slog"
  15         "net/http"
  16         "os"
  17         "os/signal"
  18         "path"
  19         "path/filepath"
  20         "syscall"
  21 )
  22
  23 //go:embed mobius/config
  24 var cfgTemplate embed.FS
  25
  26 var logLevels = map[string]slog.Level{
  27         "debug": slog.LevelDebug,
  28         "info":  slog.LevelInfo,
  29         "error": slog.LevelError,
  30 }
  31
  32 // Values swapped in by go-releaser at build time
  33 var (
  34         version = "dev"
  35         commit  = "none"
  36         date    = "unknown"
  37 )
  38
  39 func main() {
  40         ctx, cancel := context.WithCancel(context.Background())
  41
  42         sigChan := make(chan os.Signal, 1)
  43         signal.Notify(sigChan, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGINT, os.Interrupt)
  44
  45         netInterface := flag.String("interface", "", "IP addr of interface to listen on.  Defaults to all interfaces.")
  46         basePort := flag.Int("bind", 5500, "Base Hotline server port.  File transfer port is base port + 1.")
  47         statsPort := flag.String("stats-port", "", "Enable stats HTTP endpoint on address and port")
  48         configDir := flag.String("config", configSearchPaths(), "Path to config root")
  49         printVersion := flag.Bool("version", false, "Print version and exit")
  50         logLevel := flag.String("log-level", "info", "Log level")
  51         logFile := flag.String("log-file", "", "Path to log file")
  52         init := flag.Bool("init", false, "Populate the config dir with default configuration")
  53
  54         flag.Parse()
  55
  56         if *printVersion {
  57                 fmt.Printf("mobius-hotline-server %s, commit %s, built at %s", version, commit, date)
  58                 os.Exit(0)
  59         }
  60
  61         slogger := slog.New(
  62                 slog.NewTextHandler(
  63                         io.MultiWriter(os.Stdout, &lumberjack.Logger{
  64                                 Filename:   *logFile,
  65                                 MaxSize:    100, // MB
  66                                 MaxBackups: 3,
  67                                 MaxAge:     365, // days
  68                         }),
  69                         &slog.HandlerOptions{Level: logLevels[*logLevel]},
  70                 ),
  71         )
  72
  73         // It's important for Windows compatibility to use path.Join and not filepath.Join for the config dir initialization.
  74         // https://github.com/golang/go/issues/44305
  75         if *init {
  76                 if _, err := os.Stat(path.Join(*configDir, "/config.yaml")); os.IsNotExist(err) {
  77                         if err := os.MkdirAll(*configDir, 0750); err != nil {
  78                                 slogger.Error(fmt.Sprintf("error creating config dir: %s", err))
  79                                 os.Exit(1)
  80                         }
  81                         if err := copyDir(path.Join("mobius", "config"), *configDir); err != nil {
  82                                 slogger.Error(fmt.Sprintf("error copying config dir: %s", err))
  83                                 os.Exit(1)
  84                         }
  85                         slogger.Info("Config dir initialized at " + *configDir)
  86                 } else {
  87                         slogger.Info("Existing config dir found.  Skipping initialization.")
  88                 }
  89         }
  90
  91         config, err := mobius.LoadConfig(path.Join(*configDir, "config.yaml"))
  92         if err != nil {
  93                 slogger.Error(fmt.Sprintf("Error loading config: %v", err))
  94                 os.Exit(1)
  95         }
  96
  97         srv, err := hotline.NewServer(
  98                 hotline.WithInterface(*netInterface),
  99                 hotline.WithLogger(slogger),
 100                 hotline.WithPort(*basePort),
 101                 hotline.WithConfig(*config),
 102         )
 103         if err != nil {
 104                 slogger.Error(fmt.Sprintf("Error starting server: %s", err))
 105                 os.Exit(1)
 106         }
 107
 108         srv.MessageBoard, err = mobius.NewFlatNews(path.Join(*configDir, "MessageBoard.txt"))
 109         if err != nil {
 110                 slogger.Error(fmt.Sprintf("Error loading message board: %v", err))
 111                 os.Exit(1)
 112         }
 113
 114         srv.BanList, err = mobius.NewBanFile(path.Join(*configDir, "Banlist.yaml"))
 115         if err != nil {
 116                 slogger.Error(fmt.Sprintf("Error loading ban list: %v", err))
 117                 os.Exit(1)
 118         }
 119
 120         srv.ThreadedNewsMgr, err = mobius.NewThreadedNewsYAML(path.Join(*configDir, "ThreadedNews.yaml"))
 121         if err != nil {
 122                 slogger.Error(fmt.Sprintf("Error loading news: %v", err))
 123                 os.Exit(1)
 124         }
 125
 126         srv.AccountManager, err = mobius.NewYAMLAccountManager(filepath.Join(*configDir, "Users/"))
 127         if err != nil {
 128                 slogger.Error(fmt.Sprintf("Error loading accounts: %v", err))
 129                 os.Exit(1)
 130         }
 131
 132         srv.Agreement, err = mobius.NewAgreement(*configDir, "\r")
 133         if err != nil {
 134                 slogger.Error(fmt.Sprintf("Error loading agreement: %v", err))
 135                 os.Exit(1)
 136         }
 137
 138         bannerPath := filepath.Join(*configDir, config.BannerFile)
 139         srv.Banner, err = os.ReadFile(bannerPath)
 140         if err != nil {
 141                 slogger.Error(fmt.Sprintf("Error loading accounts: %v", err))
 142                 os.Exit(1)
 143         }
 144
 145         reloadFunc := func() {
 146                 if err := srv.MessageBoard.(*mobius.FlatNews).Reload(); err != nil {
 147                         slogger.Error("Error reloading news", "err", err)
 148                 }
 149
 150                 if err := srv.BanList.(*mobius.BanFile).Load(); err != nil {
 151                         slogger.Error("Error reloading ban list", "err", err)
 152                 }
 153
 154                 if err := srv.ThreadedNewsMgr.(*mobius.ThreadedNewsYAML).Load(); err != nil {
 155                         slogger.Error("Error reloading threaded news list", "err", err)
 156                 }
 157
 158                 if err := srv.Agreement.(*mobius.Agreement).Reload(); err != nil {
 159                         slogger.Error(fmt.Sprintf("Error reloading agreement: %v", err))
 160                         os.Exit(1)
 161                 }
 162         }
 163
 164         reloadHandler := func(reloadFunc func()) func(w http.ResponseWriter, _ *http.Request) {
 165                 return func(w http.ResponseWriter, _ *http.Request) {
 166                         reloadFunc()
 167
 168                         _, _ = io.WriteString(w, `{ "msg": "config reloaded" }`)
 169                 }
 170         }
 171
 172         sh := APIHandler{hlServer: srv}
 173         if *statsPort != "" {
 174                 http.HandleFunc("/", sh.RenderStats)
 175                 http.HandleFunc("/api/v1/stats", sh.RenderStats)
 176                 http.HandleFunc("/api/v1/reload", reloadHandler(reloadFunc))
 177
 178                 go func(srv *hotline.Server) {
 179                         err = http.ListenAndServe(":"+*statsPort, nil)
 180                         if err != nil {
 181                                 log.Fatal(err)
 182                         }
 183                 }(srv)
 184         }
 185
 186         go func() {
 187                 for {
 188                         sig := <-sigChan
 189                         switch sig {
 190                         case syscall.SIGHUP:
 191                                 slogger.Info("SIGHUP received.  Reloading configuration.")
 192
 193                                 reloadFunc()
 194                         default:
 195                                 signal.Stop(sigChan)
 196                                 cancel()
 197                                 os.Exit(0)
 198                         }
 199
 200                 }
 201         }()
 202
 203         slogger.Info("Hotline server started",
 204                 "version", version,
 205                 "config", *configDir,
 206                 "API port", fmt.Sprintf("%s:%v", *netInterface, *basePort),
 207                 "Transfer port", fmt.Sprintf("%s:%v", *netInterface, *basePort+1),
 208         )
 209
 210         // Assign functions to handle specific Hotline transaction types
 211         mobius.RegisterHandlers(srv)
 212
 213         // Serve Hotline requests until program exit
 214         log.Fatal(srv.ListenAndServe(ctx))
 215 }
 216
 217 type APIHandler struct {
 218         hlServer *hotline.Server
 219 }
 220
 221 func (sh *APIHandler) RenderStats(w http.ResponseWriter, _ *http.Request) {
 222         u, err := json.Marshal(sh.hlServer.CurrentStats())
 223         if err != nil {
 224                 panic(err)
 225         }
 226
 227         _, _ = io.WriteString(w, string(u))
 228 }
 229
 230 func configSearchPaths() string {
 231         for _, cfgPath := range mobius.ConfigSearchOrder {
 232                 if _, err := os.Stat(cfgPath); err == nil {
 233                         return cfgPath
 234                 }
 235         }
 236
 237         return "config"
 238 }
 239
 240 // copyDir recursively copies a directory tree, attempting to preserve permissions.
 241 func copyDir(src, dst string) error {
 242         entries, err := cfgTemplate.ReadDir(src)
 243         if err != nil {
 244                 return err
 245         }
 246         for _, dirEntry := range entries {
 247                 if dirEntry.IsDir() {
 248                         if err := os.MkdirAll(path.Join(dst, dirEntry.Name()), 0777); err != nil {
 249                                 panic(err)
 250                         }
 251                         subdirEntries, _ := cfgTemplate.ReadDir(path.Join(src, dirEntry.Name()))
 252                         for _, subDirEntry := range subdirEntries {
 253                                 f, err := os.Create(path.Join(dst, dirEntry.Name(), subDirEntry.Name()))
 254                                 if err != nil {
 255                                         return err
 256                                 }
 257
 258                                 srcFile, err := cfgTemplate.Open(path.Join(src, dirEntry.Name(), subDirEntry.Name()))
 259                                 if err != nil {
 260                                         return fmt.Errorf("error copying srcFile: %w", err)
 261                                 }
 262                                 _, err = io.Copy(f, srcFile)
 263                                 if err != nil {
 264                                         return err
 265                                 }
 266                                 _ = f.Close()
 267                         }
 268                 } else {
 269                         f, err := os.Create(path.Join(dst, dirEntry.Name()))
 270                         if err != nil {
 271                                 return err
 272                         }
 273
 274                         srcFile, err := cfgTemplate.Open(path.Join(src, dirEntry.Name()))
 275                         if err != nil {
 276                                 return err
 277                         }
 278                         _, err = io.Copy(f, srcFile)
 279                         if err != nil {
 280                                 return err
 281                         }
 282                         _ = f.Close()
 283                 }
 284         }
 285
 286         return nil
 287 }