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Go fly.io sticky session handler
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| package fly | |
| import ( | |
| "net/http" | |
| "os" | |
| "time" | |
| ) | |
| const ( | |
| flyMachineId = "fly-machine-id" | |
| flyReplay = "Fly-Replay" | |
| ) | |
| func Sticky(next http.HandlerFunc) http.HandlerFunc { | |
| mid := os.Getenv("FLY_MACHINE_ID") | |
| return func(w http.ResponseWriter, r *http.Request) { | |
| if mid != "" { | |
| cookie, err := r.Cookie(flyMachineId) | |
| if err == nil && cookie.Value != mid { | |
| w.Header().Set(flyReplay, mid) | |
| w.WriteHeader(http.StatusTemporaryRedirect) | |
| return | |
| } | |
| http.SetCookie(w, &http.Cookie{ | |
| Name: flyMachineId, | |
| Value: mid, | |
| Path: "/", | |
| Expires: time.Now().Add(24 * time.Hour), | |
| }) | |
| } | |
| next(w, r) | |
| } | |
| } |
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