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|
package main
import (
"context"
"crypto/sha256"
"flag"
"fmt"
"log"
"log/slog"
"os"
"os/signal"
"path/filepath"
"syscall"
"time"
"github.com/kyren223/eko/embeds"
"github.com/kyren223/eko/internal/server"
"github.com/kyren223/eko/internal/server/api"
"github.com/kyren223/eko/internal/server/ctxkeys"
"github.com/kyren223/eko/internal/webserver"
"github.com/kyren223/eko/pkg/assert"
"gopkg.in/natefinch/lumberjack.v2"
)
const (
port = 7223
TosEnvVar = "EKO_SERVER_TOS_FILE"
PrivacyEnvVar = "EKO_SERVER_PRIVACY_FILE"
LogDirEnvVar = "EKO_SERVER_LOG_DIR"
)
var prod = true
func main() {
prodFlag := flag.Bool("prod", true, "true for production mode, false for dev mode")
flag.Parse()
prod = !(*prodFlag)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
setupLogging()
handleReload()
handleShutdown(cancel)
if ok := reloadTosAndPrivacy(); !ok {
return
}
api.ConnectToDatabase()
assert.AddFlush(api.DB())
defer api.DB().Close()
go webserver.ServeEkoWebsite()
server := server.NewServer(ctx, port)
server.Run() // blocks
slog.Info("exited gracefully")
}
func handleReload() {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGHUP)
go func() {
for range c {
slog.Info("SIGHUP received, reloading...")
reloadTosAndPrivacy()
slog.Info("reload completed")
}
}()
slog.Info("reload handler ready")
}
func handleShutdown(cancel context.CancelFunc) {
signalChan := make(chan os.Signal, 1)
signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
go func() {
signal := <-signalChan
slog.Info("shutdown signal received", "signal", signal)
cancel()
}()
slog.Info("shutdown handler ready")
}
func setupLogging() {
logDir := os.Getenv(LogDirEnvVar)
if logDir == "" {
logDir = "logs"
}
err := os.MkdirAll(logDir, 0750)
if err != nil {
log.Fatalln(err)
}
rotator := &lumberjack.Logger{
Filename: filepath.Join(logDir, "server.log"),
MaxSize: 100, // megabytes
MaxAge: 7, // days (see Privacy Section 3: Log Retention)
}
level := slog.LevelDebug
if prod {
level = slog.LevelInfo
}
baseHandler := slog.NewJSONHandler(rotator, &slog.HandlerOptions{
AddSource: true,
Level: level,
})
handler := ctxkeys.WrapLogHandler(baseHandler)
logger := slog.New(handler)
slog.SetDefault(logger)
slog.SetLogLoggerLevel(level) // TODO: remove me after fully migrating to slog
slog.Info("logging handler ready")
go func() {
for {
now := time.Now().UTC() // UTC Time (see Privacy Section 3)
next := now.Truncate(24 * time.Hour).Add(24 * time.Hour)
time.Sleep(time.Until(next)) // sleep until next midnight
err := rotator.Rotate()
if err != nil {
slog.Error("log file rotation failed", "error", err)
} else {
slog.Info("log file rotated")
}
}
}()
}
func reloadTosAndPrivacy() bool {
if embeds.TosPrivacyHash.Load() == nil {
if prod {
embeds.TosPrivacyHash.Store("")
embeds.TermsOfService.Store("")
embeds.PrivacyPolicy.Store("")
} else {
// Set stub values for development
embeds.TermsOfService.Store(embeds.StubTos)
embeds.PrivacyPolicy.Store(embeds.StubPrivacy)
tosPrivacy := []byte(string(embeds.StubTos) + string(embeds.StubPrivacy))
stubHash := fmt.Sprintf("%x", sha256.Sum256(tosPrivacy))
embeds.TosPrivacyHash.Store(stubHash)
return true
}
}
tosFile := os.Getenv(TosEnvVar)
privacyFile := os.Getenv(PrivacyEnvVar)
if tosFile == "" || privacyFile == "" {
if prod {
slog.Error("TOS or Privacy env vars are undefined", TosEnvVar, tosFile, PrivacyEnvVar, privacyFile)
return false
}
}
tos, err := os.ReadFile(tosFile)
if err != nil {
slog.Error("error reading TOS file", "error", err)
return false
}
privacy, err := os.ReadFile(privacyFile)
if err != nil {
slog.Error("error reading Privacy file", "error", err)
return false
}
tosPrivacy := []byte(string(tos) + string(privacy))
hash := fmt.Sprintf("%x", sha256.Sum256(tosPrivacy))
oldHash := embeds.TosPrivacyHash.Load().(string)
if oldHash == hash {
slog.Info("updated nothing, tos+privacy hash remained the same", "hash", hash)
return true
}
embeds.TermsOfService.Store(tos)
embeds.PrivacyPolicy.Store(privacy)
embeds.TosPrivacyHash.Store(hash)
if oldHash == "" {
slog.Info("loaded Terms of Service and Privacy Policy", "hash", hash)
} else {
slog.Info("updated tos+privacy, hash changed", "hash", hash, "old_hash", hash)
}
return true
}
|
