forked from owenthereal/upterm
/
proxy.go
71 lines (60 loc) · 1.43 KB
/
proxy.go
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package command
import (
"context"
"fmt"
"io"
"net/url"
"os"
"github.com/oklog/run"
uio "github.com/owenthereal/upterm/io"
"github.com/owenthereal/upterm/ws"
"github.com/spf13/cobra"
)
func proxyCmd() *cobra.Command {
cmd := &cobra.Command{
Use: "proxy",
Short: "Proxy a terminal session over WebSocket",
Long: "Proxy a terminal session over WebSocket. This must be used in conjunction with SSH ProxyCommand.",
Example: ` # The host shares a session by running $SHELL over WebSocket
upterm host --server wss://uptermd.upterm.dev -- YOUR_COMMAND
# A client connects to the host session via WebSocket
ssh -o ProxyCommand='upterm proxy wss://TOKEN@uptermd.upterm.dev' TOKEN:uptermd.uptermd.dev:443`,
RunE: proxyRunE,
}
return cmd
}
func proxyRunE(c *cobra.Command, args []string) error {
if len(args) == 0 {
return fmt.Errorf("missing WebSocket url")
}
u, err := url.Parse(args[0])
if err != nil {
return err
}
conn, err := ws.NewWSConn(u, true)
if err != nil {
return err
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
var g run.Group
{
g.Add(func() error {
_, err := io.Copy(conn, uio.NewContextReader(ctx, os.Stdin))
return err
}, func(err error) {
conn.Close()
cancel()
})
}
{
g.Add(func() error {
_, err := io.Copy(os.Stdout, uio.NewContextReader(ctx, conn))
return err
}, func(err error) {
conn.Close()
cancel()
})
}
return g.Run()
}