/
main.go
311 lines (279 loc) · 10.1 KB
/
main.go
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package main
import (
"context"
"database/sql"
"errors"
"flag"
"fmt"
"net"
"net/http"
"net/url"
"os"
"os/signal"
"path/filepath"
"strconv"
"strings"
"syscall"
"time"
"github.com/coreos/go-oidc/v3/oidc"
"github.com/go-kit/log"
"github.com/gorilla/securecookie"
"github.com/joho/godotenv"
_ "github.com/lib/pq"
"github.com/nats-io/nats.go"
"github.com/prometheus/client_golang/prometheus/promhttp"
"golang.org/x/oauth2"
"golang.org/x/oauth2/endpoints"
"github.com/nakamauwu/nakama"
"github.com/nakamauwu/nakama/mailing"
natspubsub "github.com/nakamauwu/nakama/pubsub/nats"
"github.com/nakamauwu/nakama/storage"
fsstorage "github.com/nakamauwu/nakama/storage/fs"
s3storage "github.com/nakamauwu/nakama/storage/s3"
"github.com/nakamauwu/nakama/transport"
httptransport "github.com/nakamauwu/nakama/transport/http"
)
func main() {
_ = godotenv.Load()
ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
defer cancel()
logger := log.NewLogfmtLogger(log.NewSyncWriter(os.Stderr))
logger = log.With(logger, "ts", log.DefaultTimestampUTC)
if err := run(ctx, logger, os.Args[1:]); err != nil {
_ = logger.Log("error", err)
os.Exit(1)
}
}
func run(ctx context.Context, logger log.Logger, args []string) error {
var (
port, _ = strconv.Atoi(env("PORT", "3000"))
originStr = env("ORIGIN", fmt.Sprintf("http://localhost:%d", port))
dbURL = env("DATABASE_URL", "postgresql://root@127.0.0.1:26257/nakama?sslmode=disable")
execSchema, _ = strconv.ParseBool(env("EXEC_SCHEMA", "false"))
tokenKey = env("TOKEN_KEY", "supersecretkeyyoushouldnotcommit")
natsURL = env("NATS_URL", nats.DefaultURL)
sendgridAPIKey = os.Getenv("SENDGRID_API_KEY")
smtpHost = env("SMTP_HOST", "smtp.mailtrap.io")
smtpPort, _ = strconv.Atoi(env("SMTP_PORT", "25"))
smtpUsername = os.Getenv("SMTP_USERNAME")
smtpPassword = os.Getenv("SMTP_PASSWORD")
embedStaticFiles, _ = strconv.ParseBool(env("EMBED_STATIC", "false"))
s3Secure, _ = strconv.ParseBool(env("S3_SECURE", "true"))
s3Endpoint = os.Getenv("S3_ENDPOINT")
s3Region = os.Getenv("S3_REGION")
s3AccessKey = os.Getenv("S3_ACCESS_KEY")
s3SecretKey = os.Getenv("S3_SECRET_KEY")
avatarURLPrefix = env("AVATAR_URL_PREFIX", originStr+"/img/avatars/")
coverURLPrefix = env("COVER_URL_PREFIX", originStr+"/img/covers/")
mediaURLPrefix = env("MEDIA_URL_PREFIX", originStr+"/img/media/")
cookieHashKey = env("COOKIE_HASH_KEY", "supersecretkeyyoushouldnotcommit")
cookieBlockKey = env("COOKIE_BLOCK_KEY", "supersecretkeyyoushouldnotcommit")
githubClientID = os.Getenv("GITHUB_CLIENT_ID")
githubClientSecret = os.Getenv("GITHUB_CLIENT_SECRET")
googleClientID = os.Getenv("GOOGLE_CLIENT_ID")
googleClientSecret = os.Getenv("GOOGLE_CLIENT_SECRET")
disabledDevLogin, _ = strconv.ParseBool(os.Getenv("DISABLE_DEV_LOGIN"))
allowedOrigins = os.Getenv("ALLOWED_ORIGINS")
vapidPrivateKey = os.Getenv("VAPID_PRIVATE_KEY")
vapidPublicKey = os.Getenv("VAPID_PUBLIC_KEY")
)
fs := flag.NewFlagSet("nakama", flag.ExitOnError)
fs.Usage = func() {
fs.PrintDefaults()
fmt.Println("\nDon't forget to set TOKEN_KEY, and SENDGRID_API_KEY or SMTP_USERNAME and SMTP_PASSWORD for real usage.")
}
fs.IntVar(&port, "port", port, "Port in which this server will run")
fs.StringVar(&originStr, "origin", originStr, "URL origin for this service")
fs.StringVar(&dbURL, "db", dbURL, "Database URL")
fs.BoolVar(&execSchema, "exec-schema", execSchema, "Execute database schema")
fs.StringVar(&natsURL, "nats", natsURL, "NATS URL")
fs.StringVar(&smtpHost, "smtp-host", smtpHost, "SMTP server host")
fs.IntVar(&smtpPort, "smtp-port", smtpPort, "SMTP server port")
fs.BoolVar(&embedStaticFiles, "embed-static", embedStaticFiles, "Embed static files")
fs.StringVar(&avatarURLPrefix, "avatar-url-prefix", avatarURLPrefix, "Avatar URL prefix")
fs.StringVar(&coverURLPrefix, "cover-url-prefix", coverURLPrefix, "Cover URL prefix")
fs.StringVar(&mediaURLPrefix, "media-url-prefix", mediaURLPrefix, "Media URL prefix")
fs.StringVar(&cookieHashKey, "cookie-hash-key", cookieHashKey, "Cookie hash key. 32 or 64 bytes")
fs.StringVar(&cookieBlockKey, "cookie-block-key", cookieBlockKey, "Cookie block key. 16, 24, or 32 bytes")
fs.StringVar(&githubClientID, "github-client-id", githubClientID, "GitHub client ID")
fs.StringVar(&googleClientID, "google-client-id", googleClientID, "Google client ID")
fs.BoolVar(&disabledDevLogin, "disable-dev-login", disabledDevLogin, "Disable development login endpoint")
fs.StringVar(&allowedOrigins, "allowed-origins", allowedOrigins, "Comma separated list of allowed origins")
if err := fs.Parse(args); err != nil {
return fmt.Errorf("could not parse flags: %w", err)
}
origin, err := url.Parse(originStr)
if err != nil || !origin.IsAbs() {
return errors.New("invalid url origin")
}
if h := origin.Hostname(); h == "localhost" || h == "127.0.0.1" {
if p := origin.Port(); p != strconv.Itoa(port) {
origin.Host = fmt.Sprintf("%s:%d", h, port)
}
}
if i, err := strconv.Atoi(origin.Port()); err == nil {
port = i
}
db, err := sql.Open("postgres", dbURL)
if err != nil {
return fmt.Errorf("could not open db connection: %w", err)
}
defer db.Close()
if err = db.PingContext(ctx); err != nil {
return fmt.Errorf("could not ping to db: %w", err)
}
if execSchema {
_, err := db.ExecContext(ctx, nakama.Schema)
if err != nil {
return fmt.Errorf("could not run schema: %w", err)
}
}
natsConn, err := nats.Connect(natsURL)
if err != nil {
return fmt.Errorf("could not connect to NATS server: %w", err)
}
pubsub := &natspubsub.PubSub{Conn: natsConn}
var sender mailing.Sender
sendFrom := "no-reply@" + origin.Hostname()
if sendgridAPIKey != "" {
_ = logger.Log("mailing_implementation", "sendgrid")
sender = mailing.NewSendgridSender(sendFrom, sendgridAPIKey)
} else if smtpUsername != "" && smtpPassword != "" {
_ = logger.Log("mailing_implementation", "smtp")
sender = mailing.NewSMTPSender(
sendFrom,
smtpHost,
smtpPort,
smtpUsername,
smtpPassword,
)
} else {
_ = logger.Log("mailing_implementation", "log")
sender = mailing.NewLogSender(
sendFrom,
log.With(logger, "component", "mailing"),
)
}
var store storage.Store
s3Enabled := s3Endpoint != "" && s3AccessKey != "" && s3SecretKey != ""
if s3Enabled {
_ = logger.Log("storage_implementation", "s3")
s3 := &s3storage.Store{
Secure: s3Secure,
Endpoint: s3Endpoint,
Region: s3Region,
AccessKey: s3AccessKey,
SecretKey: s3SecretKey,
BucketList: []string{nakama.AvatarsBucket, nakama.CoversBucket, nakama.MediaBucket},
}
if err := s3.Setup(ctx); err != nil {
return fmt.Errorf("could not setup S3 storage: %w", err)
}
store = s3
} else {
_ = logger.Log("storage_implementation", "os file system")
wd, err := os.Getwd()
if err != nil {
return fmt.Errorf("could not get current working directory: %w", err)
}
store = &fsstorage.Store{Root: filepath.Join(wd, "web", "static", "img")}
}
var svc transport.Service = &nakama.Service{
Logger: logger,
DB: db,
Sender: sender,
Origin: origin,
TokenKey: tokenKey,
PubSub: pubsub,
Store: store,
AvatarURLPrefix: avatarURLPrefix,
CoverURLPrefix: coverURLPrefix,
MediaURLPrefix: mediaURLPrefix,
DisabledDevLogin: disabledDevLogin,
AllowedOrigins: strings.Split(allowedOrigins, ","),
VAPIDPrivateKey: vapidPrivateKey,
VAPIDPublicKey: vapidPublicKey,
}
var promHandler http.Handler
{
promHandler = promhttp.Handler()
svc = &transport.ServiceWithInstrumentation{Next: svc}
}
var oauthProviders []httptransport.OauthProvider
if githubClientID != "" && githubClientSecret != "" {
oauthProviders = append(oauthProviders, httptransport.OauthProvider{
Name: "github",
Config: &oauth2.Config{
ClientID: githubClientID,
ClientSecret: githubClientSecret,
RedirectURL: origin.String() + "/api/github_auth/callback",
Endpoint: endpoints.GitHub,
Scopes: []string{"read:user", "user:email"},
},
FetchUser: httptransport.GithubUserFetcher,
})
}
if googleClientID != "" && googleClientSecret != "" {
provider, err := oidc.NewProvider(ctx, "https://accounts.google.com")
if err != nil {
return fmt.Errorf("setup google oidc: %w", err)
}
oauthProviders = append(oauthProviders, httptransport.OauthProvider{
Name: "google",
Config: &oauth2.Config{
ClientID: googleClientID,
ClientSecret: googleClientSecret,
RedirectURL: origin.String() + "/api/google_auth/callback",
Endpoint: provider.Endpoint(),
Scopes: []string{
oidc.ScopeOpenID,
"profile",
"email",
},
},
IDTokenVerifier: provider.Verifier(&oidc.Config{
ClientID: googleClientID,
}),
})
}
cookieCodec := securecookie.New(
[]byte(cookieHashKey),
[]byte(cookieBlockKey),
)
h := httptransport.New(svc, oauthProviders, origin, log.With(logger, "component", "http"), store, cookieCodec, promHandler, embedStaticFiles)
server := &http.Server{
Addr: fmt.Sprintf(":%d", port),
Handler: h,
ReadHeaderTimeout: time.Second * 10,
ReadTimeout: time.Second * 30,
BaseContext: func(net.Listener) context.Context {
return ctx
},
}
errs := make(chan error, 1)
go func() {
<-ctx.Done()
fmt.Println()
_ = logger.Log("message", "gracefully shutting down")
ctxShutdown, cancelShutdown := context.WithTimeout(context.Background(), time.Second*5)
defer cancelShutdown()
if err := server.Shutdown(ctxShutdown); err != nil {
errs <- fmt.Errorf("could not shutdown server: %w", err)
}
errs <- nil
}()
_ = logger.Log("message", "accepting connections", "port", port)
_ = logger.Log("message", "starting server", "origin", origin)
if err := server.ListenAndServe(); err != http.ErrServerClosed {
close(errs)
return fmt.Errorf("could not listen and serve: %w", err)
}
return <-errs
}
func env(key, fallbackValue string) string {
s, ok := os.LookupEnv(key)
if !ok {
return fallbackValue
}
return s
}