mirror of https://gitee.com/IrisVega/frp.git
65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
|
// Copyright 2018 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 net
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"io"
|
||
|
|
"net"
|
||
|
|
)
|
||
|
|
|
||
|
|
type SharedConn struct {
|
||
|
|
net.Conn
|
||
|
|
buf *bytes.Buffer
|
||
|
|
}
|
||
|
|
|
||
|
|
// the bytes you read in io.Reader, will be reserved in SharedConn
|
||
|
|
func NewSharedConn(conn net.Conn) (*SharedConn, io.Reader) {
|
||
|
|
sc := &SharedConn{
|
||
|
|
Conn: conn,
|
||
|
|
buf: bytes.NewBuffer(make([]byte, 0, 1024)),
|
||
|
|
}
|
||
|
|
return sc, io.TeeReader(conn, sc.buf)
|
||
|
|
}
|
||
|
|
|
||
|
|
func NewSharedConnSize(conn net.Conn, bufSize int) (*SharedConn, io.Reader) {
|
||
|
|
sc := &SharedConn{
|
||
|
|
Conn: conn,
|
||
|
|
buf: bytes.NewBuffer(make([]byte, 0, bufSize)),
|
||
|
|
}
|
||
|
|
return sc, io.TeeReader(conn, sc.buf)
|
||
|
|
}
|
||
|
|
|
||
|
|
// Not thread safety.
|
||
|
|
func (sc *SharedConn) Read(p []byte) (n int, err error) {
|
||
|
|
if sc.buf == nil {
|
||
|
|
return sc.Conn.Read(p)
|
||
|
|
}
|
||
|
|
n, err = sc.buf.Read(p)
|
||
|
|
if err == io.EOF {
|
||
|
|
sc.buf = nil
|
||
|
|
var n2 int
|
||
|
|
n2, err = sc.Conn.Read(p[n:])
|
||
|
|
n += n2
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
func (sc *SharedConn) ResetBuf(buffer []byte) (err error) {
|
||
|
|
sc.buf.Reset()
|
||
|
|
_, err = sc.buf.Write(buffer)
|
||
|
|
return err
|
||
|
|
}
|