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

   1 package main
   2
   3 import (
   4         "context"
   5         "encoding/json"
   6         "flag"
   7         "fmt"
   8         "github.com/jhalter/mobius/hotline"
   9         "go.uber.org/zap"
  10         "go.uber.org/zap/zapcore"
  11         "io"
  12         "log"
  13         "math/rand"
  14         "net/http"
  15         "os"
  16         "runtime"
  17         "time"
  18 )
  19
  20 const (
  21         defaultPort = 5500
  22 )
  23
  24 func main() {
  25         rand.Seed(time.Now().UnixNano())
  26
  27         ctx, cancelRoot := context.WithCancel(context.Background())
  28
  29         basePort := flag.Int("bind", defaultPort, "Bind address and port")
  30         statsPort := flag.String("stats-port", "", "Enable stats HTTP endpoint on address and port")
  31         configDir := flag.String("config", defaultConfigPath(), "Path to config root")
  32         version := flag.Bool("version", false, "print version and exit")
  33         logLevel := flag.String("log-level", "info", "Log level")
  34         flag.Parse()
  35
  36         if *version {
  37                 fmt.Printf("v%s\n", hotline.VERSION)
  38                 os.Exit(0)
  39         }
  40
  41         zapLvl, ok := zapLogLevel[*logLevel]
  42         if !ok {
  43                 fmt.Printf("Invalid log level %s.  Must be debug, info, warn, or error.\n", *logLevel)
  44                 os.Exit(0)
  45         }
  46
  47         cores := []zapcore.Core{newStdoutCore(zapLvl)}
  48         l := zap.New(zapcore.NewTee(cores...))
  49         defer func() { _ = l.Sync() }()
  50         logger := l.Sugar()
  51
  52         if _, err := os.Stat(*configDir); os.IsNotExist(err) {
  53                 logger.Fatalw("Configuration directory not found", "path", configDir)
  54         }
  55
  56         srv, err := hotline.NewServer(*configDir, "", *basePort, logger, &hotline.OSFileStore{})
  57         if err != nil {
  58                 logger.Fatal(err)
  59         }
  60
  61         sh := statHandler{hlServer: srv}
  62         if *statsPort != "" {
  63                 http.HandleFunc("/", sh.RenderStats)
  64
  65                 go func(srv *hotline.Server) {
  66                         // Use the default DefaultServeMux.
  67                         err = http.ListenAndServe(":"+*statsPort, nil)
  68                         if err != nil {
  69                                 log.Fatal(err)
  70                         }
  71                 }(srv)
  72         }
  73
  74         // Serve Hotline requests until program exit
  75         logger.Fatal(srv.ListenAndServe(ctx, cancelRoot))
  76 }
  77
  78 type statHandler struct {
  79         hlServer *hotline.Server
  80 }
  81
  82 func (sh *statHandler) RenderStats(w http.ResponseWriter, _ *http.Request) {
  83         u, err := json.Marshal(sh.hlServer.Stats)
  84         if err != nil {
  85                 panic(err)
  86         }
  87
  88         _, _ = io.WriteString(w, string(u))
  89 }
  90
  91 func newStdoutCore(level zapcore.Level) zapcore.Core {
  92         encoderCfg := zap.NewProductionEncoderConfig()
  93         encoderCfg.TimeKey = "timestamp"
  94         encoderCfg.EncodeTime = zapcore.ISO8601TimeEncoder
  95
  96         return zapcore.NewCore(
  97                 zapcore.NewConsoleEncoder(encoderCfg),
  98                 zapcore.Lock(os.Stdout),
  99                 level,
 100         )
 101 }
 102
 103 var zapLogLevel = map[string]zapcore.Level{
 104         "debug": zap.DebugLevel,
 105         "info":  zap.InfoLevel,
 106         "warn":  zap.WarnLevel,
 107         "error": zap.ErrorLevel,
 108 }
 109
 110 func defaultConfigPath() (cfgPath string) {
 111         switch runtime.GOOS {
 112         case "windows":
 113                 cfgPath = "config"
 114         case "darwin":
 115                 if _, err := os.Stat("/usr/local/var/mobius/config/"); err == nil {
 116                         cfgPath = "/usr/local/var/mobius/config/"
 117                 } else if _, err := os.Stat("/opt/homebrew/var/mobius/config"); err == nil {
 118                         cfgPath = "/opt/homebrew/var/mobius/config/"
 119                 }
 120         case "linux":
 121                 cfgPath = "/usr/local/var/mobius/config/"
 122         default:
 123                 fmt.Printf("unsupported OS")
 124         }
 125
 126         return cfgPath
 127 }