RoadRunner HTTP server uses default Golang middleware model which allows you to extend it using custom or community-driven middlewares. Simplest service with middleware registration would look like:
package custom
import (
rrttp "github.com/spiral/roadrunner/service/http"
"net/http"
)
const ID = "custom"
type Service struct {
}
func (s *Service) Init(r *rrttp.Service) (bool, error) {
r.AddMiddleware(s.middleware)
return true, nil
}
func (s *Service) middleware(f http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
f(w, r)
}
}
We have to register this service after http in the main.go file in order to properly resolve dependency:
rr.Container.Register(http.ID, &http.Service{})
rr.Container.Register(custom.ID, &custom.Service{})
You can safely pass values to ServerRequestInterface->getAttributes() using attributes package:
func (s *Service) middleware(f http.HandlerFunc) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
attributes.Set(r, "key", "value")
f(w, r)
}
}