/
middleware.go
44 lines (38 loc) · 1001 Bytes
/
middleware.go
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package router
import (
"github.com/struckoff/kvstore/logger"
"go.uber.org/zap"
"net/http"
"time"
)
//LatencyMiddleware - simulates node latency
func LatencyMiddleware(h http.Handler, wait time.Duration) *Middleware {
prefunc := func(w http.ResponseWriter, r *http.Request) error {
time.Sleep(wait)
return nil
}
return &Middleware{h: h, prefunc: prefunc, postfunc: nil}
}
//Middleware - middleware template
type Middleware struct {
h http.Handler
prefunc func(w http.ResponseWriter, r *http.Request) error
postfunc func(w http.ResponseWriter, r *http.Request) error
}
func (m *Middleware) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if m.prefunc != nil {
if err := m.prefunc(w, r); err != nil {
logger.Logger().Error("middleware error", zap.Error(err))
return
}
}
if m.h != nil {
m.h.ServeHTTP(w, r)
}
if m.postfunc != nil {
if err := m.postfunc(w, r); err != nil {
logger.Logger().Error("middleware error", zap.Error(err))
return
}
}
}