Golang redis.New函數代碼示例

func NewRedisStore(namespace string, host string) (*RedisStore, error) {
	r := &RedisStore{
		namespace: namespace,
	}

	r.client = redis.New(host)

	return r, nil
}

func main() {
	var err error
	cfgfile := flag.String("config", "server.conf", "set config file")
	flag.Parse()
	Config, err = ReadConfig(*cfgfile)
	if err != nil {
		log.Fatal(err)
	}
	// Set up databases
	Redis = redis.New(Config.Redis)
	MySQL, err = sql.Open("mysql", Config.MySQL)
	if err != nil {
		log.Fatal(err)
	}
	// Set up routing and print server info
	route()
	hello()
	// Run HTTP and HTTPS servers
	wg := &sync.WaitGroup{}
	if Config.HTTP.Addr != "" {
		wg.Add(1)
		log.Printf("Starting HTTP server on %s", Config.HTTP.Addr)
		go func() {
			// Use httpxtra's listener to support Unix sockets.
			server := http.Server{
				Addr: Config.HTTP.Addr,
				Handler: httpxtra.Handler{
					Logger:   logger,
					XHeaders: Config.HTTP.XHeaders,
				},
			}
			log.Fatal(httpxtra.ListenAndServe(server))
			//wg.Done()
		}()
	}
	if Config.HTTPS.Addr != "" {
		wg.Add(1)
		log.Printf("Starting HTTPS server on %s", Config.HTTPS.Addr)
		go func() {
			server := http.Server{
				Addr:    Config.HTTPS.Addr,
				Handler: httpxtra.Handler{Logger: logger},
			}
			log.Fatal(server.ListenAndServeTLS(
				Config.HTTPS.CrtFile, Config.HTTPS.KeyFile))
			//wg.Done()
		}()
	}
	wg.Wait()
}

func main() {
	redis_client = redis.New("127.0.0.1:6379")

	queue_name_re := "([a-zA-Z0-9]+)$"
	remux.HandleFunc("^/$", IndexHandler)
	remux.HandleFunc("^/q/"+queue_name_re, queueHandler)
	server := http.Server{
		Addr:    ":8080",
		Handler: remux.DefaultServeMux,
		Logger:  logger,
	}
	server.ListenAndServe()

}

func TestRateLimiter(t *testing.T) {
	counter := struct {
		sync.Mutex
		n int
	}{}
	hf := func(w http.ResponseWriter, r *http.Request) {
		counter.Lock()
		counter.n++
		counter.Unlock()
	}
	kmf := func(r *http.Request) string {
		return "rate-limiter-test"
	}
	rl := &RateLimiter{
		Redis:    redis.New(),
		Max:      2,
		Interval: time.Second,
		KeyMaker: KeyMakerFunc(kmf),
		Handler:  http.HandlerFunc(hf),
	}
	mux := http.NewServeMux()
	mux.Handle("/", rl)
	s := httptest.NewServer(mux)
	defer s.Close()
	for i := 0; i < 3; i++ {
		resp, err := http.Get(s.URL)
		if err != nil {
			t.Fatal(err)
		}
		resp.Body.Close()
		if resp.StatusCode == http.StatusServiceUnavailable {
			t.Skip("Redis unavailable, cannot proceed")
		}
		if resp.StatusCode != http.StatusOK {
			if resp.StatusCode == http.StatusForbidden && i != 2 {
				t.Fatal(resp.Status)
			}
		}
		lim, _ := strconv.Atoi(resp.Header.Get("X-RateLimit-Limit"))
		rem, _ := strconv.Atoi(resp.Header.Get("X-RateLimit-Remaining"))
		res, _ := strconv.Atoi(resp.Header.Get("X-RateLimit-Reset"))
		switch {
		case i == 0 && lim == 2 && rem == 1 && res > 0:
		case (i == 1 || i == 2) && lim == 2 && rem == 0 && res > 0:
		default:
			log.Fatalf("Unexpected values: limit=%d, remaining=%d, reset=%d",
				lim, rem, res)
		}
	}
}

func main() {
	configFile := flag.String("c", "%name%.conf", "")
	logFile := flag.String("l", "", "")
	flag.Usage = func() {
		fmt.Println("Usage: %name% [-c %name%.conf] [-l logfile]")
		os.Exit(1)
	}
	flag.Parse()

	var err error
	config, err := loadConfig(*configFile)
	if err != nil {
		log.Fatal(err)
	}

	// Initialize log.
	if *logFile != "" {
		setLog(*logFile)
	}

	// Parse templates.
	HTML = html.Must(html.ParseGlob(config.TemplatesDir + "/*.html"))
	TEXT = text.Must(text.ParseGlob(config.TemplatesDir + "/*.txt"))

	// Set up databases.
	rc := redis.New(config.DB.Redis)
	db, err := sql.Open("mysql", config.DB.MySQL)
	if err != nil {
		log.Fatal(err)
	}

	// Set GOMAXPROCS and show server info.
	var cpuinfo string
	if n := runtime.NumCPU(); n > 1 {
		runtime.GOMAXPROCS(n)
		cpuinfo = fmt.Sprintf("%d CPUs", n)
	} else {
		cpuinfo = "1 CPU"
	}
	log.Printf("%s %s (%s)", APPNAME, VERSION, cpuinfo)

	// Start HTTP server.
	s := new(httpServer)
	s.init(config, rc, db)
	go s.ListenAndServe()
	go s.ListenAndServeTLS()

	// Sleep forever.
	select {}
}

func newTestHandler(db *freegeoip.DB) http.Handler {
	return NewHandler(&HandlerConfig{
		Prefix:    "/api",
		PublicDir: ".",
		DB:        db,
		RateLimiter: RateLimiter{
			Redis:    redis.New(),
			Max:      5,
			Interval: time.Second,
			KeyMaker: KeyMakerFunc(func(r *http.Request) string {
				return "handler-test"
			}),
		},
	})
}

func main() {
	cfgfile := flag.String("c", "%name%.conf", "set config file")
	flag.Usage = func() {
		fmt.Println("Usage: %name% [-c %name%.conf]")
		os.Exit(1)
	}
	flag.Parse()

	var err error
	cfg, err = LoadConfig(*cfgfile)
	if err != nil {
		log.Fatal(err)
	}

	// Set up databases.
	Redis = redis.New(cfg.DB.Redis)
	MySQL, err = sql.Open("mysql", cfg.DB.MySQL)
	if err != nil {
		log.Fatal(err)
	}

	// Print server info and set up HTTP routes.
	hello()
	RouteHTTP()

	// Run HTTP and HTTPS servers.
	wg := &sync.WaitGroup{}
	if cfg.HTTP.Addr != "" {
		wg.Add(1)
		go ListenHTTP()
	}
	if cfg.HTTPS.Addr != "" {
		wg.Add(1)
		go ListenHTTPS()
	}
	wg.Wait()
}

func (s *redisConfigSource) newClient(db int) *redis.Client {
	return redis.New(s.connectionURL(db))
}

// GeoipHandler handles GET on /csv, /xml and /json.
func GeoipHandler() http.HandlerFunc {
	db, err := sql.Open("sqlite3", conf.IPDB.File)
	if err != nil {
		panic(err)
	}
	_, err = db.Exec("PRAGMA cache_size=" + conf.IPDB.CacheSize)
	if err != nil {
		panic(err)
	}
	rc := redis.New(conf.Redis...)
	return func(w http.ResponseWriter, r *http.Request) {
		switch r.Method {
		case "GET":
			w.Header().Set("Access-Control-Allow-Origin", "*")
		case "OPTIONS":
			w.Header().Set("Access-Control-Allow-Origin", "*")
			w.Header().Set("Content-Type", "text/plain")
			w.Header().Set("Access-Control-Allow-Methods", "GET")
			w.Header().Set("Access-Control-Allow-Headers", "X-Requested-With")
			w.WriteHeader(200)
			return
		default:
			w.Header().Set("Allow", "GET, OPTIONS")
			http.Error(w, http.StatusText(405), 405)
			return
		}
		// GET
		// Check quota
		var ipkey string
		if ip, _, err := net.SplitHostPort(r.RemoteAddr); err != nil {
			ipkey = r.RemoteAddr // support for XHeaders
		} else {
			ipkey = ip
		}
		if qcs, err := rc.Get(ipkey); err != nil {
			if conf.Debug {
				log.Println("Redis error:", err.Error())
			}
			http.Error(w, http.StatusText(503), 503) // redis down
			return
		} else if qcs == "" {
			if err := rc.Set(ipkey, "1"); err == nil {
				rc.Expire(ipkey, conf.Limit.Expire)
			}
		} else if qc, _ := strconv.Atoi(qcs); qc < conf.Limit.MaxRequests {
			rc.Incr(ipkey)
		} else {
			// Out of quota, soz :(
			http.Error(w, http.StatusText(403), 403)
			return
		}
		// Parse URL and build the query.
		var ip string
		a := strings.SplitN(r.URL.Path, "/", 3)
		if len(a) == 3 && a[2] != "" {
			// e.g. /csv/google.com
			addrs, err := net.LookupHost(a[2])
			if err != nil {
				http.Error(w, http.StatusText(404), 404)
				return
			}
			ip = addrs[0]
		} else {
			ip = ipkey
		}
		geoip, err := GeoipLookup(db, ip)
		if err != nil {
			http.NotFound(w, r)
			return
		}
		switch a[1][0] {
		case 'c':
			w.Header().Set("Content-Type", "application/csv")
			fmt.Fprintf(w, `"%s","%s","%s","%s","%s","%s",`+
				`"%s","%0.4f","%0.4f","%s","%s"`+"\r\n",
				geoip.Ip,
				geoip.CountryCode, geoip.CountryName,
				geoip.RegionCode, geoip.RegionName,
				geoip.CityName, geoip.ZipCode,
				geoip.Latitude, geoip.Longitude,
				geoip.MetroCode, geoip.AreaCode)
		case 'j':
			resp, err := json.Marshal(geoip)
			if err != nil {
				if conf.Debug {
					log.Println("JSON error:", err.Error())
				}
				http.NotFound(w, r)
				return
			}
			callback := r.FormValue("callback")
			if callback != "" {
				w.Header().Set("Content-Type", "text/javascript")
				fmt.Fprintf(w, "%s(%s);", callback, resp)
			} else {
				w.Header().Set("Content-Type", "application/json")
				fmt.Fprintf(w, "%s", resp)
			}
		case 'x':
//.........這裏部分代碼省略.........

func (q *RedisQuota) Setup(args ...string) {
	redis.MaxIdleConnsPerAddr = 5000
	q.c = redis.New(args...)
	q.c.Timeout = time.Duration(1500) * time.Millisecond
}

func redisClear() {
	c := redis.New(addr)
	c.FlushAll()
}

func (q *redisQuota) init(cf *configFile) {
	redis.MaxIdleConnsPerAddr = 5000
	q.cf = cf
	q.rc = redis.New(cf.Redis...)
	q.rc.Timeout = time.Duration(1500) * time.Millisecond
}

func save_to_redis(key string, value string) {
	redis_client := redis.New("127.0.0.1:6379")
	redis_client.Set(key, value)
}

func main() {
	cfgfile := flag.String("c", "%name%.conf", "")
	keygen := flag.Bool("k", false, "")
	flag.Usage = func() {
		fmt.Println("Usage: %name% [-k] [-c %name%.conf]")
		os.Exit(1)
	}

	flag.Parse()

	if *keygen {
		fmt.Println(RandHex(16))
		return
	}

	var err error
	cfg, err = LoadConfig(*cfgfile)
	if err != nil {
		log.Fatal(err)
	}

	// Set up databases.
	Redis = redis.New(cfg.DB.Redis)
	MySQL, err = sql.Open("mysql", cfg.DB.MySQL)
	if err != nil {
		log.Fatal(err)
	}

	// Load HTML and plain text templates.
	LoadTemplates()

	// Set up session keys
	Session = sessions.NewCookieStore(
		[]byte(cfg.Session.AuthKey),
		[]byte(cfg.Session.CryptKey),
	)

	// Public html.
	DocumentRoot = http.FileServer(http.Dir(cfg.DocumentRoot))

	// Set GOMAXPROCS and show server info.
	var cpuinfo string
	if n := runtime.NumCPU(); n > 1 {
		runtime.GOMAXPROCS(n)
		cpuinfo = fmt.Sprintf("%d CPUs", n)
	} else {
		cpuinfo = "1 CPU"
	}

	log.Printf("%s v%s (%s)", APPNAME, VERSION, cpuinfo)

	// Start email delivery goroutine.
	go DeliverEmail()

	// Run HTTP and HTTPS servers.
	wg := &sync.WaitGroup{}
	if cfg.HTTP.Addr != "" {
		wg.Add(1)
		go ListenHTTP()
	}
	if cfg.HTTPS.Addr != "" {
		wg.Add(1)
		go ListenHTTPS()
	}
	wg.Wait()
}

func (q *RedisQuota) Setup(args ...string) {
	q.c = redis.New(args...)
	q.c.Timeout = time.Duration(800) * time.Millisecond
}