// Copyright 2017 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.

package fn

import (
	"context"
	"net/http"
)

// Global plugins, such as IP filter, logs
var globalPlugins []PluginFunc

type PluginFunc func(context.Context, *http.Request) (context.Context, error)

func Plugin(plugins ...PluginFunc) {
	for _, a := range plugins {
		if a != nil {
			globalPlugins = append(globalPlugins, a)
		}
	}
}