| 1 | package cli |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "net/http" |
| 6 | "net/url" |
| 7 | "strings" |
| 8 | "time" |
| 9 | ) |
| 10 | |
| 11 | const remoteServeCapabilityTimeout = 2 * time.Second |
| 12 | |
| 13 | // remoteServeBrowserURL keeps fragments for current Serve versions while |
| 14 | // preserving reconnects to already-running legacy processes that only accept |
| 15 | // the query-token bootstrap. Probe failures fall back to the compatible path. |
| 16 | func remoteServeBrowserURL(ctx context.Context, bound, token string) string { |
| 17 | base := "http://" + bound + "/" |
| 18 | escapedToken := url.QueryEscape(token) |
| 19 | if remoteServeSupportsFragmentToken(ctx, base) { |
| 20 | return base + "#token=" + escapedToken |
| 21 | } |
| 22 | return base + "?token=" + escapedToken |
| 23 | } |
| 24 | |
| 25 | // remoteServeSupportsFragmentToken probes without sending the secret. Current |
| 26 | // Serve versions expose /auth/token and reject GET with 405; legacy token auth |
| 27 | // rejects the unauthenticated request with 401 before routing the endpoint. |
| 28 | func remoteServeSupportsFragmentToken(ctx context.Context, base string) bool { |
| 29 | probeCtx, cancel := context.WithTimeout(ctx, remoteServeCapabilityTimeout) |
| 30 | defer cancel() |
| 31 | req, err := http.NewRequestWithContext(probeCtx, http.MethodGet, strings.TrimRight(base, "/")+"/auth/token", nil) |
| 32 | if err != nil { |
| 33 | return false |
| 34 | } |
| 35 | req.Close = true |
| 36 | client := &http.Client{ |
| 37 | Transport: &http.Transport{DisableKeepAlives: true}, |
| 38 | CheckRedirect: func(*http.Request, []*http.Request) error { return http.ErrUseLastResponse }, |
| 39 | } |
| 40 | resp, err := client.Do(req) |
| 41 | if err != nil { |
| 42 | return false |
| 43 | } |
| 44 | _ = resp.Body.Close() |
| 45 | return resp.StatusCode == http.StatusMethodNotAllowed |
| 46 | } |
| 47 |