package server import ( "encoding/json" "fmt" "net/http" "regexp" "github.com/SherClockHolmes/webpush-go" "heckel.io/ntfy/log" "heckel.io/ntfy/user" ) // test: https://regexr.com/7eqvl // example urls: // // https://android.googleapis.com/XYZ // https://fcm.googleapis.com/XYZ // https://updates.push.services.mozilla.com/XYZ // https://updates-autopush.stage.mozaws.net/XYZ // https://updates-autopush.dev.mozaws.net/XYZ // https://AAA.notify.windows.com/XYZ // https://AAA.push.apple.com/XYZ const ( webPushEndpointAllowRegexStr = `^https:\/\/(android\.googleapis\.com|fcm\.googleapis\.com|updates\.push\.services\.mozilla\.com|updates-autopush\.stage\.mozaws\.net|updates-autopush\.dev\.mozaws\.net|.*\.notify\.windows\.com|.*\.push\.apple\.com)\/.*$` webPushTopicSubscribeLimit = 50 ) var webPushEndpointAllowRegex = regexp.MustCompile(webPushEndpointAllowRegexStr) func (s *Server) handleWebPushUpdate(w http.ResponseWriter, r *http.Request, v *visitor) error { req, err := readJSONWithLimit[apiWebPushUpdateSubscriptionRequest](r.Body, jsonBodyBytesLimit, false) if err != nil || req.Endpoint == "" || req.P256dh == "" || req.Auth == "" { return errHTTPBadRequestWebPushSubscriptionInvalid } else if !webPushEndpointAllowRegex.MatchString(req.Endpoint) { return errHTTPBadRequestWebPushEndpointUnknown } else if len(req.Topics) > webPushTopicSubscribeLimit { return errHTTPBadRequestWebPushTopicCountTooHigh } topics, err := s.topicsFromIDs(req.Topics...) if err != nil { return err } if s.userManager != nil { u := v.User() for _, t := range topics { if err := s.userManager.Authorize(u, t.ID, user.PermissionRead); err != nil { logvr(v, r).With(t).Err(err).Debug("Access to topic %s not authorized", t.ID) return errHTTPForbidden.With(t) } } } if err := s.webPush.UpsertSubscription(req.Endpoint, req.Auth, req.P256dh, v.MaybeUserID(), req.Topics); err != nil { return err } return s.writeJSON(w, newSuccessResponse()) } func (s *Server) handleWebPushDelete(w http.ResponseWriter, r *http.Request, _ *visitor) error { req, err := readJSONWithLimit[apiWebPushUpdateSubscriptionRequest](r.Body, jsonBodyBytesLimit, false) if err != nil || req.Endpoint == "" { return errHTTPBadRequestWebPushSubscriptionInvalid } if err := s.webPush.RemoveSubscriptionsByEndpoint(req.Endpoint); err != nil { return err } return s.writeJSON(w, newSuccessResponse()) } func (s *Server) publishToWebPushEndpoints(v *visitor, m *message) { subscriptions, err := s.webPush.SubscriptionsForTopic(m.Topic) if err != nil { logvm(v, m).Err(err).Warn("Unable to publish web push messages") return } payload, err := json.Marshal(newWebPushPayload(fmt.Sprintf("%s/%s", s.config.BaseURL, m.Topic), m)) if err != nil { log.Tag(tagWebPush).Err(err).Warn("Unable to marshal expiring payload") return } for _, subscription := range subscriptions { ctx := log.Context{"endpoint": subscription.Endpoint, "username": subscription.UserID, "topic": m.Topic, "message_id": m.ID} if err := s.sendWebPushNotification(payload, subscription, &ctx); err != nil { log.Tag(tagWebPush).Err(err).Fields(ctx).Warn("Unable to publish web push message") } } } func (s *Server) pruneAndNotifyWebPushSubscriptions() { if s.config.WebPushPublicKey == "" { return } go func() { if err := s.pruneAndNotifyWebPushSubscriptionsInternal(); err != nil { log.Tag(tagWebPush).Err(err).Warn("Unable to prune or notify web push subscriptions") } }() } func (s *Server) pruneAndNotifyWebPushSubscriptionsInternal() error { // Expire old subscriptions if err := s.webPush.RemoveExpiredSubscriptions(s.config.WebPushExpiryDuration); err != nil { return err } // Notify subscriptions that will expire soon subscriptions, err := s.webPush.SubscriptionsExpiring(s.config.WebPushExpiryWarningDuration) if err != nil { return err } else if len(subscriptions) == 0 { return nil } payload, err := json.Marshal(newWebPushSubscriptionExpiringPayload()) if err != nil { log.Tag(tagWebPush).Err(err).Warn("Unable to marshal expiring payload") return err } warningSent := make([]*webPushSubscription, 0) for _, subscription := range subscriptions { ctx := log.Context{"endpoint": subscription.Endpoint} if err := s.sendWebPushNotification(payload, subscription, &ctx); err != nil { log.Tag(tagWebPush).Err(err).Fields(ctx).Warn("Unable to publish expiry imminent warning") continue } warningSent = append(warningSent, subscription) } if err := s.webPush.MarkExpiryWarningSent(warningSent); err != nil { return err } log.Tag(tagWebPush).Debug("Expired old subscriptions and published %d expiry imminent warnings", len(subscriptions)) return nil } func (s *Server) sendWebPushNotification(message []byte, sub *webPushSubscription, ctx *log.Context) error { resp, err := webpush.SendNotification(message, sub.ToSubscription(), &webpush.Options{ Subscriber: s.config.WebPushEmailAddress, VAPIDPublicKey: s.config.WebPushPublicKey, VAPIDPrivateKey: s.config.WebPushPrivateKey, Urgency: webpush.UrgencyHigh, // iOS requires this to ensure delivery TTL: int(s.config.CacheDuration.Seconds()), }) if err != nil { log.Tag(tagWebPush).Err(err).Fields(*ctx).Debug("Unable to publish web push message, removing endpoint") if err := s.webPush.RemoveSubscriptionsByEndpoint(sub.Endpoint); err != nil { return err } return err } if (resp.StatusCode < 200 || resp.StatusCode > 299) && resp.StatusCode != 429 { log.Tag(tagWebPush).Fields(*ctx).Field("response_code", resp.StatusCode).Debug("Unable to publish web push message, unexpected response") if err := s.webPush.RemoveSubscriptionsByEndpoint(sub.Endpoint); err != nil { return err } return errHTTPInternalErrorWebPushUnableToPublish.Fields(*ctx) } return nil }