| 1 | package cli |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "net" |
| 7 | "net/http" |
| 8 | "net/url" |
| 9 | "strings" |
| 10 | "time" |
| 11 | |
| 12 | "reasonix/internal/serve" |
| 13 | ) |
| 14 | |
| 15 | // runServeListenerAfterReady opens the browser only after HTTP responds. |
| 16 | func runServeListenerAfterReady(ctx context.Context, srv *serve.Server, ln net.Listener, addr string, onReady func()) error { |
| 17 | serveCtx, cancel := context.WithCancel(ctx) |
| 18 | defer cancel() |
| 19 | done := make(chan error, 1) |
| 20 | go func() { done <- srv.RunGracefulListener(serveCtx, ln) }() |
| 21 | if err := waitForServeHTTPReady(serveCtx, addr); err != nil { |
| 22 | cancel() |
| 23 | if serveErr := <-done; serveErr != nil { |
| 24 | return fmt.Errorf("wait for Web server readiness: %w (server: %w)", err, serveErr) |
| 25 | } |
| 26 | return fmt.Errorf("wait for Web server readiness: %w", err) |
| 27 | } |
| 28 | if onReady != nil { |
| 29 | onReady() |
| 30 | } |
| 31 | return <-done |
| 32 | } |
| 33 | |
| 34 | func waitForServeHTTPReady(ctx context.Context, addr string) error { |
| 35 | readyCtx, cancel := context.WithTimeout(ctx, 5*time.Second) |
| 36 | defer cancel() |
| 37 | req, err := http.NewRequestWithContext(readyCtx, http.MethodGet, "http://"+browserHostPort(addr)+"/", nil) |
| 38 | if err != nil { |
| 39 | return err |
| 40 | } |
| 41 | req.Close = true |
| 42 | client := &http.Client{ |
| 43 | Transport: &http.Transport{DisableKeepAlives: true}, |
| 44 | CheckRedirect: func(*http.Request, []*http.Request) error { return http.ErrUseLastResponse }, |
| 45 | } |
| 46 | resp, err := client.Do(req) |
| 47 | if err != nil { |
| 48 | return err |
| 49 | } |
| 50 | _ = resp.Body.Close() |
| 51 | return nil |
| 52 | } |
| 53 | |
| 54 | // webBrowserURL maps wildcard binds to loopback and keeps tokens in fragments. |
| 55 | func webBrowserURL(srv *serve.Server, addr, sessionID string) string { |
| 56 | base := "http://" + browserHostPort(addr) |
| 57 | entryPath := "/" |
| 58 | if sessionID != "" { |
| 59 | entryPath = "/sessions/" + url.PathEscape(sessionID) |
| 60 | } |
| 61 | switch srv.AuthMode() { |
| 62 | case "token": |
| 63 | return base + entryPath + "#token=" + url.QueryEscape(srv.AuthToken()) |
| 64 | case "password": |
| 65 | if sessionID != "" { |
| 66 | return base + entryPath |
| 67 | } |
| 68 | return base + "/login" |
| 69 | default: |
| 70 | if token := srv.AuthToken(); token != "" { |
| 71 | return base + entryPath + "#token=" + url.QueryEscape(token) |
| 72 | } |
| 73 | return base + entryPath |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | func launchWebBrowser(srv *serve.Server, addr, sessionID string) (string, error) { |
| 78 | browserURL := webBrowserURL(srv, addr, sessionID) |
| 79 | return browserURL, openBrowserURL(browserURL) |
| 80 | } |
| 81 | |
| 82 | func browserHostPort(addr string) string { |
| 83 | host, port, err := net.SplitHostPort(addr) |
| 84 | if err != nil { |
| 85 | return addr |
| 86 | } |
| 87 | switch strings.TrimSpace(host) { |
| 88 | case "", "0.0.0.0", "::": |
| 89 | host = "127.0.0.1" |
| 90 | } |
| 91 | return net.JoinHostPort(host, port) |
| 92 | } |
| 93 |