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Merge pull request fatedier#1495 from fatedier/new
support bandwith limit for one proxy
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| // Copyright 2019 fatedier, [email protected] | ||
| // | ||
| // 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 ( | ||
| "errors" | ||
| "strconv" | ||
| "strings" | ||
| ) | ||
|
|
||
| const ( | ||
| MB = 1024 * 1024 | ||
| KB = 1024 | ||
| ) | ||
|
|
||
| type BandwithQuantity struct { | ||
| s string // MB or KB | ||
|
|
||
| i int64 // bytes | ||
| } | ||
|
|
||
| func NewBandwithQuantity(s string) (BandwithQuantity, error) { | ||
| q := BandwithQuantity{} | ||
| err := q.UnmarshalString(s) | ||
| if err != nil { | ||
| return q, err | ||
| } | ||
| return q, nil | ||
| } | ||
|
|
||
| func (q *BandwithQuantity) Equal(u *BandwithQuantity) bool { | ||
| if q == nil && u == nil { | ||
| return true | ||
| } | ||
| if q != nil && u != nil { | ||
| return q.i == u.i | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| func (q *BandwithQuantity) String() string { | ||
| return q.s | ||
| } | ||
|
|
||
| func (q *BandwithQuantity) UnmarshalString(s string) error { | ||
| q.s = strings.TrimSpace(s) | ||
| if q.s == "" { | ||
| return nil | ||
| } | ||
|
|
||
| var ( | ||
| base int64 | ||
| f float64 | ||
| err error | ||
| ) | ||
| if strings.HasSuffix(s, "MB") { | ||
| base = MB | ||
| s = strings.TrimSuffix(s, "MB") | ||
| f, err = strconv.ParseFloat(s, 64) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } else if strings.HasSuffix(s, "KB") { | ||
| base = KB | ||
| s = strings.TrimSuffix(s, "KB") | ||
| f, err = strconv.ParseFloat(s, 64) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } else { | ||
| return errors.New("unit not support") | ||
| } | ||
|
|
||
| q.i = int64(f * float64(base)) | ||
| return nil | ||
| } | ||
|
|
||
| func (q *BandwithQuantity) UnmarshalJSON(b []byte) error { | ||
| return q.UnmarshalString(string(b)) | ||
| } | ||
|
|
||
| func (q *BandwithQuantity) MarshalJSON() ([]byte, error) { | ||
| return []byte(q.s), nil | ||
| } | ||
|
|
||
| func (q *BandwithQuantity) Bytes() int64 { | ||
| return q.i | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| // Copyright 2019 fatedier, [email protected] | ||
| // | ||
| // 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 limit | ||
|
|
||
| import ( | ||
| "context" | ||
| "io" | ||
|
|
||
| "golang.org/x/time/rate" | ||
| ) | ||
|
|
||
| type Reader struct { | ||
| r io.Reader | ||
| limiter *rate.Limiter | ||
| } | ||
|
|
||
| func NewReader(r io.Reader, limiter *rate.Limiter) *Reader { | ||
| return &Reader{ | ||
| r: r, | ||
| limiter: limiter, | ||
| } | ||
| } | ||
|
|
||
| func (r *Reader) Read(p []byte) (n int, err error) { | ||
| b := r.limiter.Burst() | ||
| if b < len(p) { | ||
| p = p[:b] | ||
| } | ||
| n, err = r.r.Read(p) | ||
| if err != nil { | ||
| return | ||
| } | ||
|
|
||
| err = r.limiter.WaitN(context.Background(), n) | ||
| if err != nil { | ||
| return | ||
| } | ||
| return | ||
| } |
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