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- // Copyright 2019 fatedier, fatedier@gmail.com
- //
- // 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,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
- package config
- import (
- "encoding/json"
- "errors"
- "strconv"
- "strings"
- )
- const (
- MB = 1024 * 1024
- KB = 1024
- BandwidthLimitModeClient = "client"
- BandwidthLimitModeServer = "server"
- )
- type BandwidthQuantity struct {
- s string // MB or KB
- i int64 // bytes
- }
- func NewBandwidthQuantity(s string) (BandwidthQuantity, error) {
- q := BandwidthQuantity{}
- err := q.UnmarshalString(s)
- if err != nil {
- return q, err
- }
- return q, nil
- }
- func MustBandwidthQuantity(s string) BandwidthQuantity {
- q := BandwidthQuantity{}
- err := q.UnmarshalString(s)
- if err != nil {
- panic(err)
- }
- return q
- }
- func (q *BandwidthQuantity) Equal(u *BandwidthQuantity) bool {
- if q == nil && u == nil {
- return true
- }
- if q != nil && u != nil {
- return q.i == u.i
- }
- return false
- }
- func (q *BandwidthQuantity) String() string {
- return q.s
- }
- func (q *BandwidthQuantity) UnmarshalString(s string) error {
- s = strings.TrimSpace(s)
- if s == "" {
- return nil
- }
- var (
- base int64
- f float64
- err error
- )
- switch {
- case strings.HasSuffix(s, "MB"):
- base = MB
- fstr := strings.TrimSuffix(s, "MB")
- f, err = strconv.ParseFloat(fstr, 64)
- if err != nil {
- return err
- }
- case strings.HasSuffix(s, "KB"):
- base = KB
- fstr := strings.TrimSuffix(s, "KB")
- f, err = strconv.ParseFloat(fstr, 64)
- if err != nil {
- return err
- }
- default:
- return errors.New("unit not support")
- }
- q.s = s
- q.i = int64(f * float64(base))
- return nil
- }
- func (q *BandwidthQuantity) UnmarshalJSON(b []byte) error {
- if len(b) == 4 && string(b) == "null" {
- return nil
- }
- var str string
- err := json.Unmarshal(b, &str)
- if err != nil {
- return err
- }
- return q.UnmarshalString(str)
- }
- func (q *BandwidthQuantity) MarshalJSON() ([]byte, error) {
- return []byte("\"" + q.s + "\""), nil
- }
- func (q *BandwidthQuantity) Bytes() int64 {
- return q.i
- }
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