Example #1
0
func autoUpdate(s mvc.State, token string) {
	up, err := update.New().VerifySignatureWithPEM([]byte(publicKey))
	if err != nil {
		log.Error("Failed to create update with signature: %v", err)
		return
	}

	update := func() (tryAgain bool) {
		log.Info("Checking for update")
		params := check.Params{
			AppId:      appId,
			AppVersion: version.MajorMinor(),
			UserId:     token,
		}

		result, err := params.CheckForUpdate(updateEndpoint, up)
		if err == check.NoUpdateAvailable {
			log.Info("No update available")
			return true
		} else if err != nil {
			log.Error("Error while checking for update: %v", err)
			return true
		}

		if result.Initiative == check.INITIATIVE_AUTO {
			if err := up.CanUpdate(); err != nil {
				log.Error("Can't update: insufficient permissions: %v", err)
				// tell the user to update manually
				s.SetUpdateStatus(mvc.UpdateAvailable)
			} else {
				applyUpdate(s, result)
			}
		} else if result.Initiative == check.INITIATIVE_MANUAL {
			// this is the way the server tells us to update manually
			log.Info("Server wants us to update manually")
			s.SetUpdateStatus(mvc.UpdateAvailable)
		} else {
			log.Info("Update available, but ignoring")
		}

		// stop trying after a single download attempt
		// XXX: improve this so the we can:
		// 1. safely update multiple times
		// 2. only retry after temporary errors
		return false
	}

	// try to update immediately and then at a set interval
	for {
		if tryAgain := update(); !tryAgain {
			break
		}

		time.Sleep(updateCheckInterval)
	}
}
Example #2
0
func checkForUpdate() (*check.Result, error) {
	params := check.Params{
		AppVersion: Version,
		AppId:      "ap_BQxVz1iWMxmjQnbVGd85V58qz6",
		Channel:    "stable",
	}

	up := update.New()
	up, err := up.VerifySignatureWithPEM([]byte(updatePublicKey))
	if err != nil {
		return nil, fmt.Errorf("parse public key for updates: %s.", err)
	}

	return params.CheckForUpdate(updateUri, up)
}