package main import ( "context" "crypto/ecdsa" "math" "net" "net/http" crypto "github.com/nspcc-dev/neofs-crypto" "github.com/nspcc-dev/neofs-s3-gw/api" "github.com/nspcc-dev/neofs-s3-gw/api/auth" "github.com/nspcc-dev/neofs-s3-gw/api/handler" "github.com/nspcc-dev/neofs-s3-gw/api/layer" "github.com/nspcc-dev/neofs-sdk-go/pkg/pool" "github.com/spf13/viper" "go.uber.org/zap" ) type ( // App is the main application structure. App struct { pool pool.Pool ctr auth.Center log *zap.Logger cfg *viper.Viper tls *tlsConfig obj layer.Client api api.Handler maxClients api.MaxClients webDone chan struct{} wrkDone chan struct{} } tlsConfig struct { KeyFile string CertFile string } ) func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App { var ( conns pool.Pool key *ecdsa.PrivateKey err error tls *tlsConfig caller api.Handler ctr auth.Center obj layer.Client poolPeers = fetchPeers(l, v) reBalance = defaultRebalanceTimer conTimeout = defaultConnectTimeout reqTimeout = defaultRequestTimeout maxClientsCount = defaultMaxClientsCount maxClientsDeadline = defaultMaxClientsDeadline nfsCredential = v.GetString(cfgNeoFSPrivateKey) ) if v := v.GetDuration(cfgConnectTimeout); v > 0 { conTimeout = v } if v := v.GetDuration(cfgRequestTimeout); v > 0 { reqTimeout = v } if v := v.GetInt(cfgMaxClientsCount); v > 0 { maxClientsCount = v } if v := v.GetDuration(cfgMaxClientsDeadline); v > 0 { maxClientsDeadline = v } if v := v.GetDuration(cfgRebalanceTimer); v > 0 { reBalance = v } if key, err = crypto.LoadPrivateKey(nfsCredential); err != nil { l.Fatal("could not load NeoFS private key") } if v.IsSet(cfgTLSKeyFile) && v.IsSet(cfgTLSCertFile) { tls = &tlsConfig{ KeyFile: v.GetString(cfgTLSKeyFile), CertFile: v.GetString(cfgTLSCertFile), } } l.Info("using credentials", zap.String("NeoFS", nfsCredential)) opts := &pool.BuilderOptions{ Key: key, NodeConnectionTimeout: conTimeout, NodeRequestTimeout: reqTimeout, ClientRebalanceInterval: reBalance, SessionExpirationEpoch: math.MaxUint64, } conns, err = poolPeers.Build(ctx, opts) if err != nil { l.Fatal("failed to create connection pool", zap.Error(err)) } // prepare object layer obj = layer.NewLayer(l, conns) // prepare auth center ctr = auth.New(conns, key) if caller, err = handler.New(l, obj); err != nil { l.Fatal("could not initialize API handler", zap.Error(err)) } return &App{ ctr: ctr, pool: conns, log: l, cfg: v, obj: obj, tls: tls, api: caller, webDone: make(chan struct{}, 1), wrkDone: make(chan struct{}, 1), maxClients: api.NewMaxClientsMiddleware(maxClientsCount, maxClientsDeadline), } } // Wait waits for application to finish. func (a *App) Wait() { a.log.Info("application started") <-a.webDone // wait for web-server to be stopped a.log.Info("application finished") } // Server runs HTTP server to handle S3 API requests. func (a *App) Server(ctx context.Context) { var ( err error lis net.Listener lic net.ListenConfig srv = new(http.Server) addr = a.cfg.GetString(cfgListenAddress) ) if lis, err = lic.Listen(ctx, "tcp", addr); err != nil { a.log.Fatal("could not prepare listener", zap.Error(err)) } router := newS3Router() // Attach app-specific routes: // attachHealthy(router, a.cli) attachMetrics(router, a.cfg, a.log) attachProfiler(router, a.cfg, a.log) // Attach S3 API: domains := fetchDomains(a.cfg) a.log.Info("fetch domains, prepare to use API", zap.Strings("domains", domains)) api.Attach(router, domains, a.maxClients, a.api, a.ctr, a.log) // Use mux.Router as http.Handler srv.Handler = router srv.ErrorLog = zap.NewStdLog(a.log) go func() { a.log.Info("starting server", zap.String("bind", addr)) switch a.tls { case nil: if err = srv.Serve(lis); err != nil && err != http.ErrServerClosed { a.log.Fatal("listen and serve", zap.Error(err)) } default: a.log.Info("using certificate", zap.String("key", a.tls.KeyFile), zap.String("cert", a.tls.CertFile)) if err = srv.ServeTLS(lis, a.tls.CertFile, a.tls.KeyFile); err != nil && err != http.ErrServerClosed { a.log.Fatal("listen and serve", zap.Error(err)) } } }() <-ctx.Done() ctx, cancel := context.WithTimeout(context.Background(), defaultShutdownTimeout) defer cancel() a.log.Info("stopping server", zap.Error(srv.Shutdown(ctx))) close(a.webDone) }