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722 lines
23 KiB
Markdown
722 lines
23 KiB
Markdown
---
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type: module
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weight: 130
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---
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### Push Notifications
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+--------------------+ +-------------------+
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Matrix HTTP | | | |
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Notification Protocol | App Developer | | Device Vendor |
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| | | |
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+-------------------+ | +----------------+ | | +---------------+ |
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| | | | | | | | | |
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| Matrix homeserver +-----> Push Gateway +------> Push Provider | |
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| | | | | | | | | |
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+-^-----------------+ | +----------------+ | | +----+----------+ |
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| | | | | |
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Matrix | | | | | |
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Client/Server API + | | | | |
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| | +--------------------+ +-------------------+
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| +--+-+ |
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| | <-------------------------------------------+
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+---+ |
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| | Provider Push Protocol
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+----+
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Mobile Device or Client
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This module adds support for push notifications. Homeservers send
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notifications of events to user-configured HTTP endpoints. Users may
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also configure a number of rules that determine which events generate
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notifications. These are all stored and managed by the user's
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homeserver. This allows user-specific push settings to be reused between
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client applications.
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The above diagram shows the flow of push notifications being sent to a
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handset where push notifications are submitted via the handset vendor,
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such as Apple's APNS or Google's GCM. This happens as follows:
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1. The client app signs in to a homeserver.
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2. The client app registers with its vendor's Push Provider and obtains
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a routing token of some kind.
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3. The mobile app uses the Client/Server API to add a 'pusher',
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providing the URL of a specific Push Gateway which is configured for
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that application. It also provides the routing token it has acquired
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from the Push Provider.
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4. The homeserver starts sending HTTP requests to the Push Gateway
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using the supplied URL. The Push Gateway relays this notification to
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the Push Provider, passing the routing token along with any
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necessary private credentials the provider requires to send push
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notifications.
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5. The Push Provider sends the notification to the device.
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Definitions for terms used in this section are below:
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Push Provider
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A push provider is a service managed by the device vendor which can send
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notifications directly to the device. Google Cloud Messaging (GCM) and
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Apple Push Notification Service (APNS) are two examples of push
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providers.
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Push Gateway
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A push gateway is a server that receives HTTP event notifications from
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homeservers and passes them on to a different protocol such as APNS for
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iOS devices or GCM for Android devices. Clients inform the homeserver
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which Push Gateway to send notifications to when it sets up a Pusher.
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Pusher
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A pusher is a worker on the homeserver that manages the sending of HTTP
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notifications for a user. A user can have multiple pushers: one per
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device.
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Push Rule
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A push rule is a single rule that states under what *conditions* an
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event should be passed onto a push gateway and *how* the notification
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should be presented. These rules are stored on the user's homeserver.
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They are manually configured by the user, who can create and view them
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via the Client/Server API.
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Push Ruleset
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A push ruleset *scopes a set of rules according to some criteria*. For
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example, some rules may only be applied for messages from a particular
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sender, a particular room, or by default. The push ruleset contains the
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entire set of scopes and rules.
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#### Client behaviour
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Clients MUST configure a Pusher before they will receive push
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notifications. There is a single API endpoint for this, as described
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below.
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{{pusher\_cs\_http\_api}}
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##### Listing Notifications
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A client can retrieve a list of events that it has been notified about.
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This may be useful so that users can see a summary of what important
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messages they have received.
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{{notifications\_cs\_http\_api}}
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##### Receiving notifications
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Servers MUST include the number of unread notifications in a client's
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`/sync` stream, and MUST update it as it changes. Notifications are
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determined by the push rules which apply to an event.
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When the user updates their read receipt (either by using the API or by
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sending an event), notifications prior to and including that event MUST
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be marked as read.
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##### Push Rules
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A push rule is a single rule that states under what *conditions* an
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event should be passed onto a push gateway and *how* the notification
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should be presented. There are different "kinds" of push rules and each
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rule has an associated priority. Every push rule MUST have a `kind` and
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`rule_id`. The `rule_id` is a unique string within the kind of rule and
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its' scope: `rule_ids` do not need to be unique between rules of the
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same kind on different devices. Rules may have extra keys depending on
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the value of `kind`.
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The different `kind`s of rule, in the order that they are checked, are:
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Override Rules `override`
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The highest priority rules are user-configured overrides.
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Content-specific Rules `content`
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These configure behaviour for (unencrypted) messages that match certain
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patterns. Content rules take one parameter: `pattern`, that gives the
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glob pattern to match against. This is treated in the same way as
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`pattern` for `event_match`.
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Room-specific Rules `room`
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These rules change the behaviour of all messages for a given room. The
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`rule_id` of a room rule is always the ID of the room that it affects.
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Sender-specific rules `sender`
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These rules configure notification behaviour for messages from a
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specific Matrix user ID. The `rule_id` of Sender rules is always the
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Matrix user ID of the user whose messages they'd apply to.
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Underride rules `underride`
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These are identical to `override` rules, but have a lower priority than
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`content`, `room` and `sender` rules.
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Rules with the same `kind` can specify an ordering priority. This
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determines which rule is selected in the event of multiple matches. For
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example, a rule matching "tea" and a separate rule matching "time" would
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both match the sentence "It's time for tea". The ordering of the rules
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would then resolve the tiebreak to determine which rule is executed.
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Only `actions` for highest priority rule will be sent to the Push
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Gateway.
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Each rule can be enabled or disabled. Disabled rules never match. If no
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rules match an event, the homeserver MUST NOT notify the Push Gateway
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for that event. Homeservers MUST NOT notify the Push Gateway for events
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that the user has sent themselves.
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###### Actions
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All rules have an associated list of `actions`. An action affects if and
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how a notification is delivered for a matching event. The following
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actions are defined:
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`notify`
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This causes each matching event to generate a notification.
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`dont_notify`
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This prevents each matching event from generating a notification
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`coalesce`
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This enables notifications for matching events but activates homeserver
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specific behaviour to intelligently coalesce multiple events into a
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single notification. Not all homeservers may support this. Those that do
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not support it should treat it as the `notify` action.
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`set_tweak`
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Sets an entry in the `tweaks` dictionary key that is sent in the
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notification request to the Push Gateway. This takes the form of a
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dictionary with a `set_tweak` key whose value is the name of the tweak
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to set. It may also have a `value` key which is the value to which it
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should be set.
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Actions that have no parameters are represented as a string. Otherwise,
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they are represented as a dictionary with a key equal to their name and
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other keys as their parameters, e.g.
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`{ "set_tweak": "sound", "value": "default" }`
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####### Tweaks
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The `set_tweak` action is used to add an entry to the 'tweaks'
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dictionary that is sent in the notification request to the Push Gateway.
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The following tweaks are defined:
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`sound`
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A string representing the sound to be played when this notification
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arrives. A value of `default` means to play a default sound. A device
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may choose to alert the user by some other means if appropriate, eg.
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vibration.
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`highlight`
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A boolean representing whether or not this message should be highlighted
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in the UI. This will normally take the form of presenting the message in
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a different colour and/or style. The UI might also be adjusted to draw
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particular attention to the room in which the event occurred. If a
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`highlight` tweak is given with no value, its value is defined to be
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`true`. If no highlight tweak is given at all then the value of
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`highlight` is defined to be false.
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Tweaks are passed transparently through the homeserver so client
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applications and Push Gateways may agree on additional tweaks. For
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example, a tweak may be added to specify how to flash the notification
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light on a mobile device.
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###### Conditions
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`override` and `underride` rules MAY have a list of 'conditions'. All
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conditions must hold true for an event in order for the rule to match. A
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rule with no conditions always matches. The following conditions are
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defined:
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`event_match`
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This is a glob pattern match on a field of the event. Parameters:
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- `key`: The dot-separated field of the event to match, e.g.
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`content.body`
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- `pattern`: The glob-style pattern to match against. Patterns with no
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special glob characters should be treated as having asterisks
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prepended and appended when testing the condition.
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`contains_display_name`
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This matches unencrypted messages where `content.body` contains the
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owner's display name in that room. This is a separate rule because
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display names may change and as such it would be hard to maintain a rule
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that matched the user's display name. This condition has no parameters.
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`room_member_count`
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This matches the current number of members in the room. Parameters:
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- `is`: A decimal integer optionally prefixed by one of, `==`, `<`,
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`>`, `>=` or `<=`. A prefix of `<` matches rooms where the member
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count is strictly less than the given number and so forth. If no
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prefix is present, this parameter defaults to `==`.
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`sender_notification_permission`
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This takes into account the current power levels in the room, ensuring
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the sender of the event has high enough power to trigger the
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notification.
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Parameters:
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- `key`: A string that determines the power level the sender must have
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to trigger notifications of a given type, such as `room`. Refer to
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the [m.room.power\_levels]() event schema for information about what
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the defaults are and how to interpret the event. The `key` is used
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to look up the power level required to send a notification type from
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the `notifications` object in the power level event content.
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Unrecognised conditions MUST NOT match any events, effectively making
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the push rule disabled.
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`room`, `sender` and `content` rules do not have conditions in the same
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way, but instead have predefined conditions. In the cases of `room` and
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`sender` rules, the `rule_id` of the rule determines its behaviour.
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###### Predefined Rules
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Homeservers can specify "server-default rules" which operate at a lower
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priority than "user-defined rules". The `rule_id` for all server-default
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rules MUST start with a dot (".") to identify them as "server-default".
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The following server-default rules are specified:
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####### Default Override Rules
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######## `.m.rule.master`
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Matches all events. This can be enabled to turn off all push
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notifications other than those generated by override rules set by the
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user. By default this rule is disabled.
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Definition
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{
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"rule_id": ".m.rule.master",
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"default": true,
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"enabled": false,
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"conditions": [],
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"actions": [
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"dont_notify"
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]
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}
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######## `.m.rule.suppress_notices`
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Matches messages with a `msgtype` of `notice`.
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Definition:
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{
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"rule_id": ".m.rule.suppress_notices",
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"default": true,
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"enabled": true,
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"conditions": [
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{
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"kind": "event_match",
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"key": "content.msgtype",
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"pattern": "m.notice",
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}
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],
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"actions": [
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"dont_notify",
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]
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}
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######## `.m.rule.invite_for_me`
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Matches any invites to a new room for this user.
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Definition:
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{
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"rule_id": ".m.rule.invite_for_me",
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"default": true,
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"enabled": true,
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"conditions": [
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{
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"key": "type",
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"kind": "event_match",
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"pattern": "m.room.member"
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},
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{
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"key": "content.membership",
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"kind": "event_match",
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"pattern": "invite"
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},
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{
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"key": "state_key",
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"kind": "event_match",
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"pattern": "[the user's Matrix ID]"
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}
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],
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"actions": [
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"notify",
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{
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"set_tweak": "sound",
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"value": "default"
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}
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]
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}
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######## `.m.rule.member_event`
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Matches any `m.room.member_event`.
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Definition:
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{
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"rule_id": ".m.rule.member_event",
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"default": true,
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"enabled": true,
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"conditions": [
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{
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"key": "type",
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"kind": "event_match",
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"pattern": "m.room.member"
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}
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],
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"actions": [
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"dont_notify"
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]
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}
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######## `.m.rule.contains_display_name`
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Matches any message whose content is unencrypted and contains the user's
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current display name in the room in which it was sent.
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Definition:
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{
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"rule_id": ".m.rule.contains_display_name",
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"default": true,
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"enabled": true,
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"conditions": [
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{
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"kind": "contains_display_name"
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}
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],
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"actions": [
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"notify",
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{
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"set_tweak": "sound",
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"value": "default"
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},
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{
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"set_tweak": "highlight"
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}
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]
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}
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######## `.m.rule.tombstone`
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Matches any state event whose type is `m.room.tombstone`. This is
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intended to notify users of a room when it is upgraded, similar to what
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an `@room` notification would accomplish.
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Definition:
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{
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"rule_id": ".m.rule.tombstone",
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"default": true,
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"enabled": true,
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"conditions": [
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{
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"kind": "event_match",
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"key": "type",
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"pattern": "m.room.tombstone"
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},
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{
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"kind": "event_match",
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"key": "state_key",
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"pattern": ""
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}
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],
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"actions": [
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"notify",
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{
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"set_tweak": "highlight"
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}
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]
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}
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######## `.m.rule.roomnotif`
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Matches any message whose content is unencrypted and contains the text
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`@room`, signifying the whole room should be notified of the event.
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Definition:
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{
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"rule_id": ".m.rule.roomnotif",
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"default": true,
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"enabled": true,
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"conditions": [
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{
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"kind": "event_match",
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"key": "content.body",
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"pattern": "@room"
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},
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{
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"kind": "sender_notification_permission",
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"key": "room"
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}
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],
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"actions": [
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"notify",
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{
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"set_tweak": "highlight"
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}
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]
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}
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####### Default Content Rules
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######## `.m.rule.contains_user_name`
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Matches any message whose content is unencrypted and contains the local
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part of the user's Matrix ID, separated by word boundaries.
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Definition (as a `content` rule):
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{
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"rule_id": ".m.rule.contains_user_name",
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"default": true,
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"enabled": true,
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"pattern": "[the local part of the user's Matrix ID]",
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"actions": [
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"notify",
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{
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"set_tweak": "sound",
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"value": "default"
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},
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{
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"set_tweak": "highlight"
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}
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]
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}
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####### Default Underride Rules
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######## `.m.rule.call`
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Matches any incoming VOIP call.
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Definition:
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{
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"rule_id": ".m.rule.call",
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"default": true,
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"enabled": true,
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"conditions": [
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{
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"key": "type",
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"kind": "event_match",
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"pattern": "m.call.invite"
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}
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],
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"actions": [
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"notify",
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{
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"set_tweak": "sound",
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"value": "ring"
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}
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]
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}
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######## `.m.rule.encrypted_room_one_to_one`
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Matches any encrypted event sent in a room with exactly two members.
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Unlike other push rules, this rule cannot be matched against the content
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of the event by nature of it being encrypted. This causes the rule to be
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an "all or nothing" match where it either matches *all* events that are
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encrypted (in 1:1 rooms) or none.
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Definition:
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{
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"rule_id": ".m.rule.encrypted_room_one_to_one",
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"default": true,
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"enabled": true,
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"conditions": [
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{
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"kind": "room_member_count",
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"is": "2"
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},
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{
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"kind": "event_match",
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"key": "type",
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"pattern": "m.room.encrypted"
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}
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],
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"actions": [
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"notify",
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{
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"set_tweak": "sound",
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"value": "default"
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}
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]
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}
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######## `.m.rule.room_one_to_one`
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Matches any message sent in a room with exactly two members.
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Definition:
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{
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"rule_id": ".m.rule.room_one_to_one",
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"default": true,
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"enabled": true,
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"conditions": [
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{
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"kind": "room_member_count",
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"is": "2"
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},
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{
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"kind": "event_match",
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"key": "type",
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|
"pattern": "m.room.message"
|
|
}
|
|
],
|
|
"actions": [
|
|
"notify",
|
|
{
|
|
"set_tweak": "sound",
|
|
"value": "default"
|
|
}
|
|
]
|
|
}
|
|
|
|
######## `.m.rule.message`
|
|
|
|
Matches all chat messages.
|
|
|
|
Definition:
|
|
|
|
{
|
|
"rule_id": ".m.rule.message",
|
|
"default": true,
|
|
"enabled": true,
|
|
"conditions": [
|
|
{
|
|
"kind": "event_match",
|
|
"key": "type",
|
|
"pattern": "m.room.message"
|
|
}
|
|
],
|
|
"actions": [
|
|
"notify"
|
|
]
|
|
}
|
|
|
|
######## `.m.rule.encrypted`
|
|
|
|
Matches all encrypted events. Unlike other push rules, this rule cannot
|
|
be matched against the content of the event by nature of it being
|
|
encrypted. This causes the rule to be an "all or nothing" match where it
|
|
either matches *all* events that are encrypted (in group rooms) or none.
|
|
|
|
Definition:
|
|
|
|
{
|
|
"rule_id": ".m.rule.encrypted",
|
|
"default": true,
|
|
"enabled": true,
|
|
"conditions": [
|
|
{
|
|
"kind": "event_match",
|
|
"key": "type",
|
|
"pattern": "m.room.encrypted"
|
|
}
|
|
],
|
|
"actions": [
|
|
"notify"
|
|
]
|
|
}
|
|
|
|
##### Push Rules: API
|
|
|
|
Clients can retrieve, add, modify and remove push rules globally or
|
|
per-device using the APIs below.
|
|
|
|
{{pushrules\_cs\_http\_api}}
|
|
|
|
##### Push Rules: Events
|
|
|
|
When a user changes their push rules a `m.push_rules` event is sent to
|
|
all clients in the `account_data` section of their next `/sync` request.
|
|
The content of the event is the current push rules for the user.
|
|
|
|
{{m\_push\_rules\_event}}
|
|
|
|
###### Examples
|
|
|
|
To create a rule that suppresses notifications for the room with ID
|
|
`!dj234r78wl45Gh4D:matrix.org`:
|
|
|
|
curl -X PUT -H "Content-Type: application/json" "https://example.com/_matrix/client/%CLIENT_MAJOR_VERSION%/pushrules/global/room/%21dj234r78wl45Gh4D%3Amatrix.org?access_token=123456" -d \
|
|
'{
|
|
"actions" : ["dont_notify"]
|
|
}'
|
|
|
|
To suppress notifications for the user `@spambot:matrix.org`:
|
|
|
|
curl -X PUT -H "Content-Type: application/json" "https://example.com/_matrix/client/%CLIENT_MAJOR_VERSION%/pushrules/global/sender/%40spambot%3Amatrix.org?access_token=123456" -d \
|
|
'{
|
|
"actions" : ["dont_notify"]
|
|
}'
|
|
|
|
To always notify for messages that contain the work 'cake' and set a
|
|
specific sound (with a rule\_id of `SSByZWFsbHkgbGlrZSBjYWtl`):
|
|
|
|
curl -X PUT -H "Content-Type: application/json" "https://example.com/_matrix/client/%CLIENT_MAJOR_VERSION%/pushrules/global/content/SSByZWFsbHkgbGlrZSBjYWtl?access_token=123456" -d \
|
|
'{
|
|
"pattern": "cake",
|
|
"actions" : ["notify", {"set_sound":"cakealarm.wav"}]
|
|
}'
|
|
|
|
To add a rule suppressing notifications for messages starting with
|
|
'cake' but ending with 'lie', superseding the previous rule:
|
|
|
|
curl -X PUT -H "Content-Type: application/json" "https://example.com/_matrix/client/%CLIENT_MAJOR_VERSION%/pushrules/global/content/U3BvbmdlIGNha2UgaXMgYmVzdA?access_token=123456&before=SSByZWFsbHkgbGlrZSBjYWtl" -d \
|
|
'{
|
|
"pattern": "cake*lie",
|
|
"actions" : ["notify"]
|
|
}'
|
|
|
|
To add a custom sound for notifications messages containing the word
|
|
'beer' in any rooms with 10 members or fewer (with greater importance
|
|
than the room, sender and content rules):
|
|
|
|
curl -X PUT -H "Content-Type: application/json" "https://example.com/_matrix/client/%CLIENT_MAJOR_VERSION%/pushrules/global/override/U2VlIHlvdSBpbiBUaGUgRHVrZQ?access_token=123456" -d \
|
|
'{
|
|
"conditions": [
|
|
{"kind": "event_match", "key": "content.body", "pattern": "beer" },
|
|
{"kind": "room_member_count", "is": "<=10"}
|
|
],
|
|
"actions" : [
|
|
"notify",
|
|
{"set_sound":"beeroclock.wav"}
|
|
]
|
|
}'
|
|
|
|
#### Server behaviour
|
|
|
|
#### Push Gateway behaviour
|
|
|
|
##### Recommendations for APNS
|
|
|
|
The exact format for sending APNS notifications is flexible and up to
|
|
the client app and its' push gateway to agree on. As APNS requires that
|
|
the sender has a private key owned by the app developer, each app must
|
|
have its own push gateway. It is recommended that:
|
|
|
|
- The APNS token be base64 encoded and used as the pushkey.
|
|
- A different app\_id be used for apps on the production and sandbox
|
|
APS environments.
|
|
- APNS push gateways do not attempt to wait for errors from the APNS
|
|
gateway before returning and instead to store failures and return
|
|
'rejected' responses next time that pushkey is used.
|
|
|
|
#### Security considerations
|
|
|
|
Clients specify the Push Gateway URL to use to send event notifications
|
|
to. This URL should be over HTTPS and *never* over HTTP.
|
|
|
|
As push notifications will pass through a Push Provider, message content
|
|
shouldn't be sent in the push itself where possible. Instead, Push
|
|
Gateways should send a "sync" command to instruct the client to get new
|
|
events from the homeserver directly.
|