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package rpcplugin
import (
"bufio"
"encoding/binary"
"io"
"os"
)
type rwc struct {
io.ReadCloser
io.WriteCloser
}
func (rwc *rwc) Close() (err error) {
if f, ok := rwc.ReadCloser.(*os.File); ok {
// https://groups.google.com/d/topic/golang-nuts/i4w58KJ5-J8/discussion
err = os.NewFile(f.Fd(), "").Close()
} else {
err = rwc.ReadCloser.Close()
}
werr := rwc.WriteCloser.Close()
if err == nil {
err = werr
}
return
}
func NewReadWriteCloser(r io.ReadCloser, w io.WriteCloser) io.ReadWriteCloser {
return &rwc{r, w}
}
type RemoteIOReader struct {
conn io.ReadWriteCloser
}
func (r *RemoteIOReader) Read(b []byte) (int, error) {
var buf [10]byte
n := binary.PutVarint(buf[:], int64(len(b)))
if _, err := r.conn.Write(buf[:n]); err != nil {
return 0, err
}
return r.conn.Read(b)
}
func (r *RemoteIOReader) Close() error {
return r.conn.Close()
}
func ConnectIOReader(conn io.ReadWriteCloser) io.ReadCloser {
return &RemoteIOReader{conn}
}
func ServeIOReader(r io.Reader, conn io.ReadWriteCloser) {
cr := bufio.NewReader(conn)
defer conn.Close()
buf := make([]byte, 32*1024)
for {
n, err := binary.ReadVarint(cr)
if err != nil {
break
}
if written, err := io.CopyBuffer(conn, io.LimitReader(r, n), buf); err != nil || written < n {
break
}
}
}
|
