mirror of https://gitee.com/IrisVega/frp.git
125 lines
2.7 KiB
Go
125 lines
2.7 KiB
Go
// Copyright 2017 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 io
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import (
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"io"
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"sync"
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"github.com/fatedier/frp/utils/crypto"
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"github.com/fatedier/frp/utils/pool"
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)
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// Join two io.ReadWriteCloser and do some operations.
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func Join(c1 io.ReadWriteCloser, c2 io.ReadWriteCloser) (inCount int64, outCount int64) {
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var wait sync.WaitGroup
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pipe := func(to io.ReadWriteCloser, from io.ReadWriteCloser, count *int64) {
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defer to.Close()
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defer from.Close()
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defer wait.Done()
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buf := pool.GetBuf(16 * 1024)
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defer pool.PutBuf(buf)
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*count, _ = io.CopyBuffer(to, from, buf)
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}
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wait.Add(2)
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go pipe(c1, c2, &inCount)
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go pipe(c2, c1, &outCount)
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wait.Wait()
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return
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}
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func WithEncryption(rwc io.ReadWriteCloser, key []byte) (io.ReadWriteCloser, error) {
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w, err := crypto.NewWriter(rwc, key)
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if err != nil {
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return nil, err
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}
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return WrapReadWriteCloser(crypto.NewReader(rwc, key), w, func() error {
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return rwc.Close()
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}), nil
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}
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func WithCompression(rwc io.ReadWriteCloser) io.ReadWriteCloser {
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sr := pool.GetSnappyReader(rwc)
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sw := pool.GetSnappyWriter(rwc)
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return WrapReadWriteCloser(sr, sw, func() error {
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err := rwc.Close()
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pool.PutSnappyReader(sr)
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pool.PutSnappyWriter(sw)
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return err
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})
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}
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type ReadWriteCloser struct {
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r io.Reader
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w io.Writer
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closeFn func() error
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closed bool
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mu sync.Mutex
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}
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// closeFn will be called only once
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func WrapReadWriteCloser(r io.Reader, w io.Writer, closeFn func() error) io.ReadWriteCloser {
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return &ReadWriteCloser{
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r: r,
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w: w,
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closeFn: closeFn,
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closed: false,
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}
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}
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func (rwc *ReadWriteCloser) Read(p []byte) (n int, err error) {
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return rwc.r.Read(p)
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}
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func (rwc *ReadWriteCloser) Write(p []byte) (n int, err error) {
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return rwc.w.Write(p)
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}
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func (rwc *ReadWriteCloser) Close() (errRet error) {
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rwc.mu.Lock()
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if rwc.closed {
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rwc.mu.Unlock()
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return
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}
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rwc.closed = true
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rwc.mu.Unlock()
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var err error
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if rc, ok := rwc.r.(io.Closer); ok {
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err = rc.Close()
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if err != nil {
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errRet = err
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}
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}
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if wc, ok := rwc.w.(io.Closer); ok {
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err = wc.Close()
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if err != nil {
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errRet = err
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}
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}
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if rwc.closeFn != nil {
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err = rwc.closeFn()
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if err != nil {
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errRet = err
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}
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}
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return
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}
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