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package client
import (
"bytes"
"errors"
"io"
"net"
"time"
"tunnel/pkg/config"
"tunnel/pkg/netstring"
)
var errClosed = errors.New("server closed connection")
type Client struct {
conn net.Conn
}
func New(path string) (*Client, error) {
conn, err := net.Dial("unixpacket", path)
if err != nil {
return nil, err
}
return &Client{conn: conn}, nil
}
func (c *Client) Send(args []string) (string, error) {
c.conn.SetDeadline(time.Now().Add(config.IoTimeout))
defer func() {
var t time.Time
c.conn.SetDeadline(t)
}()
out := new(bytes.Buffer)
enc := netstring.NewEncoder(out)
for _, s := range args {
enc.Encode(s)
}
buf := make([]byte, config.BufSize)
_, ew := c.conn.Write(out.Bytes())
if ew != nil {
return "", ew
}
nr, er := c.conn.Read(buf)
if er != nil {
if er == io.EOF {
return "", errClosed
}
return "", er
}
return string(buf[:nr]), nil
}
func (c *Client) Close() {
c.conn.Close()
}
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