Push Notifications: Generate local notifications based on /sync result.

[giomfo]

tfheen has been investigating fixing the privacy leaking problems that we currently have on iOS by needlessly passing the msg bodies of all push notifications to Apple. would it be possible to look into generating notifications as Local Notifications based on the result of the /sync triggered by the APNS push, rather than displaying the actual APNS push?

[ara4n]

See also matrix-org/synapse#1540. This is quite a major security issue.

[kfatehi]

Looked into this a bit, because I did not think it's possible, but my knowledge was outdated, and it is indeed possible. http://stackoverflow.com/questions/11861117/can-push-notifications-be-used-to-run-code-without-notifying-user

With release of iOS 7 this is finally possible using Remote/Silent notifications. They work same as Push notifications but instead of alerting the user immediately they can fire up background fetch mode and upload/download new content.

Here is simple tutorial: http://www.objc.io/issue-5/multitasking.html

[ara4n]

we do this these days :)