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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 |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "os" | ||
| "os/signal" | ||
| "syscall" | ||
| "time" | ||
|
|
||
| "github.com/charmbracelet/log" | ||
| "github.com/charmbracelet/ssh" | ||
| "github.com/charmbracelet/wish" | ||
| "github.com/charmbracelet/wish/logging" | ||
| ) | ||
|
|
||
| const ( | ||
| host = "localhost" | ||
| port = 23234 | ||
| ) | ||
|
|
||
| // 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) | ||
| } | ||
|
|
||
| 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 | ||
| } | ||
| }() | ||
|
|
||
| <-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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