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