40 lines
947 B
Go
40 lines
947 B
Go
|
package http
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"net/http"
|
||
|
|
|
||
|
|
"github.com/influxdata/influxdb/v2/kit/feature"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Enabler allows the switching between two HTTP Handlers
|
||
|
|
type Enabler interface {
|
||
|
|
Enabled(ctx context.Context, flagger ...feature.Flagger) bool
|
||
|
|
}
|
||
|
|
|
||
|
|
// FeatureHandler is used to switch requests between an exisiting and a feature flagged
|
||
|
|
// HTTP Handler on a per-request basis
|
||
|
|
type FeatureHandler struct {
|
||
|
|
enabler Enabler
|
||
|
|
flagger feature.Flagger
|
||
|
|
oldHandler http.Handler
|
||
|
|
newHandler http.Handler
|
||
|
|
prefix string
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewFeatureHandler(e Enabler, f feature.Flagger, old, new http.Handler, prefix string) *FeatureHandler {
|
||
|
|
return &FeatureHandler{e, f, old, new, prefix}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (h *FeatureHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
|
||
|
|
if h.enabler.Enabled(r.Context(), h.flagger) {
|
||
|
|
h.newHandler.ServeHTTP(w, r)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
h.oldHandler.ServeHTTP(w, r)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (h *FeatureHandler) Prefix() string {
|
||
|
|
return h.prefix
|
||
|
|
}
|