diff options
Diffstat (limited to 'Godeps/_workspace/src/gopkg.in/throttled/throttled.v1/examples/rate-limit')
-rw-r--r-- | Godeps/_workspace/src/gopkg.in/throttled/throttled.v1/examples/rate-limit/main.go | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/gopkg.in/throttled/throttled.v1/examples/rate-limit/main.go b/Godeps/_workspace/src/gopkg.in/throttled/throttled.v1/examples/rate-limit/main.go new file mode 100644 index 000000000..1e4c1cb8f --- /dev/null +++ b/Godeps/_workspace/src/gopkg.in/throttled/throttled.v1/examples/rate-limit/main.go @@ -0,0 +1,101 @@ +package main + +import ( + "flag" + "fmt" + "log" + "math/rand" + "net/http" + "sync" + "time" + + "github.com/mattermost/platform/Godeps/_workspace/src/github.com/garyburd/redigo/redis" + "github.com/mattermost/platform/Godeps/_workspace/src/gopkg.in/throttled/throttled.v1" + "github.com/mattermost/platform/Godeps/_workspace/src/gopkg.in/throttled/throttled.v1/store" +) + +var ( + requests = flag.Int("requests", 10, "number of requests allowed in the time window") + window = flag.Duration("window", time.Minute, "time window for the limit of requests") + storeType = flag.String("store", "mem", "store to use, one of `mem` or `redis` (on default localhost port)") + delayRes = flag.Duration("delay-response", 0, "delay the response by a random duration between 0 and this value") + output = flag.String("output", "v", "type of output, one of `v`erbose, `q`uiet, `ok`-only, `ko`-only") +) + +func main() { + flag.Parse() + + var h http.Handler + var ok, ko int + var mu sync.Mutex + var st throttled.Store + + // Keep the start time to print since-time + start := time.Now() + // Create the rate-limit store + switch *storeType { + case "mem": + st = store.NewMemStore(0) + case "redis": + st = store.NewRedisStore(setupRedis(), "throttled:", 0) + default: + log.Fatalf("unsupported store: %s", *storeType) + } + // Create the rate-limit throttler, varying on path + t := throttled.RateLimit(throttled.Q{Requests: *requests, Window: *window}, &throttled.VaryBy{ + Path: true, + }, st) + + // Set its denied handler + t.DeniedHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + if *output == "v" || *output == "ko" { + log.Printf("KO: %s", time.Since(start)) + } + throttled.DefaultDeniedHandler.ServeHTTP(w, r) + mu.Lock() + defer mu.Unlock() + ko++ + }) + + // Throttle the OK handler + rand.Seed(time.Now().Unix()) + h = t.Throttle(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + if *output == "v" || *output == "ok" { + log.Printf("ok: %s", time.Since(start)) + } + if *delayRes > 0 { + wait := time.Duration(rand.Intn(int(*delayRes))) + time.Sleep(wait) + } + w.WriteHeader(200) + mu.Lock() + defer mu.Unlock() + ok++ + })) + + // Print stats once in a while + go func() { + for _ = range time.Tick(10 * time.Second) { + mu.Lock() + log.Printf("ok: %d, ko: %d", ok, ko) + mu.Unlock() + } + }() + fmt.Println("server listening on port 9000") + http.ListenAndServe(":9000", h) +} + +func setupRedis() *redis.Pool { + pool := &redis.Pool{ + MaxIdle: 3, + IdleTimeout: 30 * time.Second, + Dial: func() (redis.Conn, error) { + return redis.Dial("tcp", ":6379") + }, + TestOnBorrow: func(c redis.Conn, t time.Time) error { + _, err := c.Do("PING") + return err + }, + } + return pool +} |