package main import ( "context" "crypto/ecdsa" "errors" "time" "github.com/fasthttp/router" "google.golang.org/grpc/grpclog" "github.com/nspcc-dev/neofs-api-go/service" "github.com/nspcc-dev/neofs-api-go/state" "github.com/spf13/viper" "github.com/valyala/fasthttp" "go.uber.org/zap" ) type ( app struct { pool *Pool log *zap.Logger cfg *viper.Viper key *ecdsa.PrivateKey wlog logger web *fasthttp.Server jobDone chan struct{} webDone chan struct{} rebalanceTimer time.Duration nodes []string reqHealth *state.HealthRequest reqNetmap *state.NetmapRequest conTimeout time.Duration reqTimeout time.Duration } App interface { Wait() Worker(context.Context) Serve(context.Context) } Option func(a *app) ) func WithLogger(l *zap.Logger) Option { return func(a *app) { if l == nil { return } a.log = l } } func WithConfig(c *viper.Viper) Option { return func(a *app) { if c == nil { return } a.cfg = c } } func newApp(opt ...Option) App { a := &app{ log: zap.L(), cfg: viper.GetViper(), web: new(fasthttp.Server), jobDone: make(chan struct{}), webDone: make(chan struct{}), } for i := range opt { opt[i](a) } a.wlog = gRPCLogger(a.log) if a.cfg.GetBool("verbose") { grpclog.SetLoggerV2(a.wlog) } a.key = fetchKey(a.log, a.cfg) a.rebalanceTimer = a.cfg.GetDuration("rebalance_timer") a.conTimeout = a.cfg.GetDuration("connect_timeout") a.reqTimeout = a.cfg.GetDuration("request_timeout") // -- setup FastHTTP server: -- a.web.Name = "neofs-http-gate" a.web.ReadBufferSize = a.cfg.GetInt("web.read_buffer_size") a.web.WriteBufferSize = a.cfg.GetInt("web.write_buffer_size") a.web.ReadTimeout = a.cfg.GetDuration("web.read_timeout") a.web.WriteTimeout = a.cfg.GetDuration("web.write_timeout") a.web.GetOnly = true a.web.DisableHeaderNamesNormalizing = true a.web.NoDefaultServerHeader = true a.web.NoDefaultContentType = true // -- -- -- -- -- -- -- -- -- -- a.reqHealth = new(state.HealthRequest) a.reqHealth.SetTTL(service.NonForwardingTTL) if err := service.SignRequestHeader(a.key, a.reqHealth); err != nil { a.log.Fatal("could not sign `HealthRequest`", zap.Error(err)) } a.reqNetmap = new(state.NetmapRequest) a.reqNetmap.SetTTL(service.SingleForwardingTTL) if err := service.SignRequestHeader(a.key, a.reqNetmap); err != nil { a.log.Fatal("could not sign `NetmapRequest`", zap.Error(err)) } a.pool = newPool(a.log, a.cfg) return a } func (a *app) Wait() { a.log.Info("application started") select { case <-a.jobDone: // wait for job is stopped <-a.webDone case <-a.webDone: // wait for web-server is stopped <-a.jobDone } } func (a *app) Worker(ctx context.Context) { dur := a.rebalanceTimer tick := time.NewTimer(dur) a.pool.reBalance(ctx) switch _, err := a.pool.getConnection(ctx); { case err == nil: // ignore case errors.Is(err, context.Canceled): // ignore // l.Info("context canceled") default: a.log.Fatal("could get connection", zap.Error(err)) } loop: for { select { case <-ctx.Done(): break loop case <-tick.C: a.pool.reBalance(ctx) tick.Reset(dur) } } a.pool.close() tick.Stop() a.log.Info("connection worker stopped") close(a.jobDone) } func (a *app) Serve(ctx context.Context) { go func() { <-ctx.Done() a.log.Info("stop web-server", zap.Error(a.web.Shutdown())) close(a.webDone) }() r := router.New() r.RedirectTrailingSlash = true r.GET("/get/:cid/:oid/", a.receiveFile) // attaching /-/(ready,healthy) attachHealthy(r, a.pool.unhealthy) // enable metrics if a.cfg.GetBool("metrics") { a.log.Info("enabled /metrics") attachMetrics(r, a.wlog) } // enable pprof if a.cfg.GetBool("pprof") { a.log.Info("enabled /debug/pprof") attachProfiler(r) } bind := a.cfg.GetString("listen_address") a.log.Info("run gateway server", zap.String("address", bind)) a.web.Handler = r.Handler if err := a.web.ListenAndServe(bind); err != nil { a.log.Fatal("could not start server", zap.Error(err)) } }