fail2ban-prometheus-exporter/auth/middleware.go

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package auth
import (
"net/http"
)
type BasicAuthProvider interface {
Enabled() bool
DoesBasicAuthMatch(username, password string) bool
}
func BasicAuthMiddleware(handlerFunc http.HandlerFunc, basicAuthProvider BasicAuthProvider) http.HandlerFunc {
if basicAuthProvider.Enabled() {
return func(w http.ResponseWriter, r *http.Request) {
if doesBasicAuthMatch(r, basicAuthProvider) {
handlerFunc.ServeHTTP(w, r)
} else {
w.WriteHeader(http.StatusUnauthorized)
}
}
}
return handlerFunc
}
func doesBasicAuthMatch(r *http.Request, basicAuthProvider BasicAuthProvider) bool {
rawUsername, rawPassword, ok := r.BasicAuth()
if ok {
return basicAuthProvider.DoesBasicAuthMatch(rawUsername, rawPassword)
}
return false
}