59 lines
1.7 KiB
Go
59 lines
1.7 KiB
Go
package inflightreq
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import (
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"context"
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"fmt"
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"net/http"
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"github.com/opentracing/opentracing-go/ext"
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"github.com/traefik/traefik/v2/pkg/config/dynamic"
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"github.com/traefik/traefik/v2/pkg/log"
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"github.com/traefik/traefik/v2/pkg/middlewares"
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"github.com/traefik/traefik/v2/pkg/tracing"
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"github.com/vulcand/oxy/connlimit"
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)
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const (
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typeName = "InFlightReq"
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)
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type inFlightReq struct {
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handler http.Handler
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name string
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}
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// New creates a max request middleware.
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// If no source criterion is provided in the config, it defaults to RequestHost.
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func New(ctx context.Context, next http.Handler, config dynamic.InFlightReq, name string) (http.Handler, error) {
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ctxLog := log.With(ctx, log.Str(log.MiddlewareName, name), log.Str(log.MiddlewareType, typeName))
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log.FromContext(ctxLog).Debug("Creating middleware")
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if config.SourceCriterion == nil ||
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config.SourceCriterion.IPStrategy == nil &&
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config.SourceCriterion.RequestHeaderName == "" && !config.SourceCriterion.RequestHost {
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config.SourceCriterion = &dynamic.SourceCriterion{
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RequestHost: true,
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}
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}
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sourceMatcher, err := middlewares.GetSourceExtractor(ctxLog, config.SourceCriterion)
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if err != nil {
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return nil, fmt.Errorf("error creating requests limiter: %w", err)
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}
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handler, err := connlimit.New(next, sourceMatcher, config.Amount)
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if err != nil {
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return nil, fmt.Errorf("error creating connection limit: %w", err)
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}
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return &inFlightReq{handler: handler, name: name}, nil
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}
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func (i *inFlightReq) GetTracingInformation() (string, ext.SpanKindEnum) {
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return i.name, tracing.SpanKindNoneEnum
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}
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func (i *inFlightReq) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
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i.handler.ServeHTTP(rw, req)
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}
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