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