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io.go
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io.go
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package netx
import (
"io"
"sync"
"github.com/golang/snappy"
"github.com/starudream/secret-tunnel/internal/pool"
)
type ReadWriteCloser struct {
r io.Reader
w io.Writer
closed bool
closeFn func() error
mu sync.Mutex
}
var _ io.ReadWriteCloser = (*ReadWriteCloser)(nil)
func (rwc *ReadWriteCloser) Read(p []byte) (n int, err error) {
return rwc.r.Read(p)
}
func (rwc *ReadWriteCloser) Write(p []byte) (n int, err error) {
n, err = rwc.w.Write(p)
if err != nil {
return
}
if w, ok := rwc.w.(*snappy.Writer); ok {
err = w.Flush()
}
return
}
func (rwc *ReadWriteCloser) Close() (res error) {
rwc.mu.Lock()
if rwc.closed {
rwc.mu.Unlock()
return
}
rwc.closed = true
rwc.mu.Unlock()
var err error
if rc, ok := rwc.r.(io.Closer); ok {
err = rc.Close()
if err != nil {
res = err
}
}
if wc, ok := rwc.w.(io.Closer); ok {
err = wc.Close()
if err != nil {
res = err
}
}
if rwc.closeFn != nil {
err = rwc.closeFn()
if err != nil {
res = err
}
}
return
}
func WrapReadWriteCloser(r io.Reader, w io.Writer, closeFn func() error) io.ReadWriteCloser {
return &ReadWriteCloser{
r: r,
w: w,
closeFn: closeFn,
}
}
func WithCompression(rwc io.ReadWriteCloser) io.ReadWriteCloser {
sr := pool.GetSnappyReader(rwc)
sw := pool.GetSnappyWriter(rwc)
return WrapReadWriteCloser(sr, sw, func() error {
err := rwc.Close()
pool.PutSnappyReader(sr)
pool.PutSnappyWriter(sw)
return err
})
}