49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
package maxconnection
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net/http"
|
|
|
|
"github.com/containous/traefik/v2/pkg/config/dynamic"
|
|
"github.com/containous/traefik/v2/pkg/middlewares"
|
|
"github.com/containous/traefik/v2/pkg/tracing"
|
|
"github.com/opentracing/opentracing-go/ext"
|
|
"github.com/vulcand/oxy/connlimit"
|
|
"github.com/vulcand/oxy/utils"
|
|
)
|
|
|
|
const (
|
|
typeName = "MaxConnection"
|
|
)
|
|
|
|
type maxConnection struct {
|
|
handler http.Handler
|
|
name string
|
|
}
|
|
|
|
// New creates a max connection middleware.
|
|
func New(ctx context.Context, next http.Handler, maxConns dynamic.MaxConn, name string) (http.Handler, error) {
|
|
middlewares.GetLogger(ctx, name, typeName).Debug("Creating middleware")
|
|
|
|
extractFunc, err := utils.NewExtractor(maxConns.ExtractorFunc)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error creating connection limit: %v", err)
|
|
}
|
|
|
|
handler, err := connlimit.New(next, extractFunc, maxConns.Amount)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("error creating connection limit: %v", err)
|
|
}
|
|
|
|
return &maxConnection{handler: handler, name: name}, nil
|
|
}
|
|
|
|
func (mc *maxConnection) GetTracingInformation() (string, ext.SpanKindEnum) {
|
|
return mc.name, tracing.SpanKindNoneEnum
|
|
}
|
|
|
|
func (mc *maxConnection) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
|
|
mc.handler.ServeHTTP(rw, req)
|
|
}
|