mirror of https://github.com/fatedier/frp
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
1.1 KiB
52 lines
1.1 KiB
5 years ago
|
// 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 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
|
||
|
|
}
|