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docs: add an example of reverse proxy (#214)
closes #191 Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,71 @@ | ||
package main | ||
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import ( | ||
"context" | ||
"errors" | ||
"fmt" | ||
"os" | ||
"os/signal" | ||
"syscall" | ||
"time" | ||
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"github.com/charmbracelet/log" | ||
"github.com/charmbracelet/ssh" | ||
"github.com/charmbracelet/wish" | ||
"github.com/charmbracelet/wish/logging" | ||
) | ||
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const ( | ||
host = "localhost" | ||
port = 23234 | ||
) | ||
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// example usage: ssh -N -R 23236:localhost:23235 -p 23234 localhost | ||
func main() { | ||
forwardHandler := &ssh.ForwardedTCPHandler{} | ||
s, err := wish.NewServer( | ||
wish.WithAddress(fmt.Sprintf("%s:%d", host, port)), | ||
wish.WithHostKeyPath(".ssh/term_info_ed25519"), | ||
func(s *ssh.Server) error { | ||
s.ReversePortForwardingCallback = func(_ ssh.Context, bindHost string, bindPort uint32) bool { | ||
log.Info("reverse port forwarding allowed", "host", bindHost, "port", bindPort) | ||
return true | ||
} | ||
s.RequestHandlers = map[string]ssh.RequestHandler{ | ||
"tcpip-forward": forwardHandler.HandleSSHRequest, | ||
"cancel-tcpip-forward": forwardHandler.HandleSSHRequest, | ||
} | ||
return nil | ||
}, | ||
wish.WithMiddleware( | ||
func(h ssh.Handler) ssh.Handler { | ||
return func(s ssh.Session) { | ||
wish.Println(s, "remote port forwarding available") | ||
h(s) | ||
} | ||
}, | ||
logging.Middleware(), | ||
), | ||
) | ||
if err != nil { | ||
log.Error("could not start server", "error", err) | ||
} | ||
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done := make(chan os.Signal, 1) | ||
signal.Notify(done, os.Interrupt, syscall.SIGINT, syscall.SIGTERM) | ||
log.Info("Starting SSH server", "host", host, "port", port) | ||
go func() { | ||
if err = s.ListenAndServe(); err != nil && !errors.Is(err, ssh.ErrServerClosed) { | ||
log.Error("could not start server", "error", err) | ||
done <- nil | ||
} | ||
}() | ||
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<-done | ||
log.Info("Stopping SSH server") | ||
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second) | ||
defer func() { cancel() }() | ||
if err := s.Shutdown(ctx); err != nil && !errors.Is(err, ssh.ErrServerClosed) { | ||
log.Error("could not stop server", "error", err) | ||
} | ||
} |
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