128 lines
2.7 KiB
Go
128 lines
2.7 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package clientutil
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import (
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"encoding/json"
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"errors"
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"fmt"
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"time"
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"github.com/docker/go-units"
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"golang.org/x/time/rate"
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"gopkg.in/yaml.v3"
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)
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// RateLimit is a wrapper for rate.Limit, support json and yaml unmarshal function
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// yaml example 1:
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// rate_limit: 2097152 # 2MiB
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// yaml example 2:
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// rate_limit: 2MiB
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type RateLimit struct {
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rate.Limit
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}
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func (r *RateLimit) UnmarshalJSON(b []byte) error {
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return r.unmarshal(json.Unmarshal, b)
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}
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func (r *RateLimit) UnmarshalYAML(node *yaml.Node) error {
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return r.unmarshal(yaml.Unmarshal, []byte(node.Value))
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}
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func (r *RateLimit) unmarshal(unmarshal func(in []byte, out interface{}) (err error), b []byte) error {
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var v interface{}
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if err := unmarshal(b, &v); err != nil {
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return err
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}
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switch value := v.(type) {
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case float64:
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r.Limit = rate.Limit(value)
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return nil
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case int:
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r.Limit = rate.Limit(value)
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return nil
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case string:
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limit, err := units.RAMInBytes(value)
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if err != nil {
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return fmt.Errorf("invalid rate limit: %w", err)
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}
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r.Limit = rate.Limit(limit)
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return nil
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default:
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return errors.New("invalid rate limit")
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}
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}
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type Duration struct {
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time.Duration
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}
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func (d *Duration) UnmarshalJSON(b []byte) error {
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var v interface{}
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if err := json.Unmarshal(b, &v); err != nil {
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return err
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}
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return d.unmarshal(v)
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}
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func (d *Duration) UnmarshalYAML(node *yaml.Node) error {
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var v interface{}
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switch node.Kind {
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case yaml.ScalarNode:
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switch node.Tag {
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case "!!int":
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var i int
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if err := node.Decode(&i); err != nil {
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return err
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}
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v = i
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case "!!str":
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var i string
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if err := node.Decode(&i); err != nil {
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return err
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}
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v = i
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default:
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return errors.New("invalid duration")
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}
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default:
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return errors.New("invalid duration")
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}
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return d.unmarshal(v)
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}
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func (d *Duration) unmarshal(v interface{}) error {
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switch value := v.(type) {
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case float64:
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d.Duration = time.Duration(value)
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return nil
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case int:
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d.Duration = time.Duration(value)
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return nil
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case string:
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var err error
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d.Duration, err = time.ParseDuration(value)
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if err != nil {
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return err
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}
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return nil
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default:
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return errors.New("invalid duration")
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}
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}
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