55 lines
1.3 KiB
Go
55 lines
1.3 KiB
Go
package ratelimiter
|
|
|
|
import (
|
|
"context"
|
|
"net/http"
|
|
"time"
|
|
|
|
"github.com/containous/traefik/pkg/config/dynamic"
|
|
"github.com/containous/traefik/pkg/middlewares"
|
|
"github.com/containous/traefik/pkg/tracing"
|
|
"github.com/opentracing/opentracing-go/ext"
|
|
"github.com/vulcand/oxy/ratelimit"
|
|
"github.com/vulcand/oxy/utils"
|
|
)
|
|
|
|
const (
|
|
typeName = "RateLimiterType"
|
|
)
|
|
|
|
type rateLimiter struct {
|
|
handler http.Handler
|
|
name string
|
|
}
|
|
|
|
// New creates rate limiter middleware.
|
|
func New(ctx context.Context, next http.Handler, config dynamic.RateLimit, name string) (http.Handler, error) {
|
|
middlewares.GetLogger(ctx, name, typeName).Debug("Creating middleware")
|
|
|
|
extractFunc, err := utils.NewExtractor(config.ExtractorFunc)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
rateSet := ratelimit.NewRateSet()
|
|
for _, rate := range config.RateSet {
|
|
if err = rateSet.Add(time.Duration(rate.Period), rate.Average, rate.Burst); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
rl, err := ratelimit.New(next, extractFunc, rateSet)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &rateLimiter{handler: rl, name: name}, nil
|
|
}
|
|
|
|
func (r *rateLimiter) GetTracingInformation() (string, ext.SpanKindEnum) {
|
|
return r.name, tracing.SpanKindNoneEnum
|
|
}
|
|
|
|
func (r *rateLimiter) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
|
|
r.handler.ServeHTTP(rw, req)
|
|
}
|