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types.go
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types.go
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/*
* Copyright 2020 The Dragonfly Authors
*
* 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 clientutil
import (
"encoding/json"
"time"
"github.com/docker/go-units"
"github.com/pkg/errors"
"golang.org/x/time/rate"
"gopkg.in/yaml.v3"
)
// RateLimit is a wrapper for rate.Limit, support json and yaml unmarshal function
// yaml example 1:
// rate_limit: 2097152 # 2MiB
// yaml example 2:
// rate_limit: 2MiB
type RateLimit struct {
rate.Limit
}
func (r *RateLimit) UnmarshalJSON(b []byte) error {
return r.unmarshal(json.Unmarshal, b)
}
func (r *RateLimit) UnmarshalYAML(node *yaml.Node) error {
return r.unmarshal(yaml.Unmarshal, []byte(node.Value))
}
func (r *RateLimit) unmarshal(unmarshal func(in []byte, out interface{}) (err error), b []byte) error {
var v interface{}
if err := unmarshal(b, &v); err != nil {
return err
}
switch value := v.(type) {
case float64:
r.Limit = rate.Limit(value)
return nil
case int:
r.Limit = rate.Limit(value)
return nil
case string:
limit, err := units.RAMInBytes(value)
if err != nil {
return errors.WithMessage(err, "invalid rate limit")
}
r.Limit = rate.Limit(limit)
return nil
default:
return errors.New("invalid rate limit")
}
}
type Duration struct {
time.Duration
}
func (d *Duration) UnmarshalJSON(b []byte) error {
var v interface{}
if err := json.Unmarshal(b, &v); err != nil {
return err
}
return d.unmarshal(v)
}
func (d *Duration) UnmarshalYAML(node *yaml.Node) error {
var v interface{}
switch node.Kind {
case yaml.ScalarNode:
switch node.Tag {
case "!!int":
var i int
if err := node.Decode(&i); err != nil {
return err
}
v = i
case "!!str":
var i string
if err := node.Decode(&i); err != nil {
return err
}
v = i
default:
return errors.New("invalid duration")
}
default:
return errors.New("invalid duration")
}
return d.unmarshal(v)
}
func (d *Duration) unmarshal(v interface{}) error {
switch value := v.(type) {
case float64:
d.Duration = time.Duration(value)
return nil
case int:
d.Duration = time.Duration(value)
return nil
case string:
var err error
d.Duration, err = time.ParseDuration(value)
if err != nil {
return err
}
return nil
default:
return errors.New("invalid duration")
}
}