traefik/middlewares/addPrefix.go

35 lines
762 B
Go

package middlewares
import (
"context"
"net/http"
)
// AddPrefix is a middleware used to add prefix to an URL request
type AddPrefix struct {
Handler http.Handler
Prefix string
}
type key string
const (
// AddPrefixKey is the key within the request context used to
// store the added prefix
AddPrefixKey key = "AddPrefix"
)
func (s *AddPrefix) ServeHTTP(w http.ResponseWriter, r *http.Request) {
r.URL.Path = s.Prefix + r.URL.Path
if r.URL.RawPath != "" {
r.URL.RawPath = s.Prefix + r.URL.RawPath
}
r.RequestURI = r.URL.RequestURI()
r = r.WithContext(context.WithValue(r.Context(), AddPrefixKey, s.Prefix))
s.Handler.ServeHTTP(w, r)
}
// SetHandler sets handler
func (s *AddPrefix) SetHandler(Handler http.Handler) {
s.Handler = Handler
}