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1265 lines
41 KiB
ReStructuredText
1265 lines
41 KiB
ReStructuredText
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=========================
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Synapse Client-Server API
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=========================
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The following specification outlines how a client can send and receive data from
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a home server.
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[[TODO(kegan): 4/7/14 Grilling
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- Mechanism for getting historical state changes (e.g. topic updates) - add
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query param flag?
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- Generic mechanism for linking first class events (e.g. feedback) with other s
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first class events (e.g. messages)?
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- Generic mechanism for updating 'stuff about the room' (e.g. favourite coffee)
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AND specifying clobbering rules (clobber/add to list/etc)?
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- How to ensure a consistent view for clients paginating through room lists?
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They aren't really ordered in any way, and if you're paginating
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through them, how can you show them a consistent result set? Temporary 'room
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list versions' akin to event version? How does that work?
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]]
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[[TODO(kegan):
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Outstanding problems / missing spec:
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- Push
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- Typing notifications
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]]
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Terminology
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-----------
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Stream Tokens:
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An opaque token used to make further streaming requests. When using any
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pagination streaming API, responses will contain a start and end stream token.
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When reconnecting to the stream, these tokens can be used to tell the server
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where the client got up to in the stream.
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Event ID:
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Every event that comes down the event stream or that is returned from the REST
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API has an associated event ID (event_id). This ID will be the same between the
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REST API and the event stream, so any duplicate events can be clobbered
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correctly without knowing anything else about the event.
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Message ID:
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The ID of a message sent by a client in a room. Clients send IMs to each other
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in rooms. Each IM sent by a client must have a unique message ID which is unique
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for that particular client.
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User ID:
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The @username:host style ID of the client. When registering for an account, the
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client specifies their username. The user_id is this username along with the
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home server's unique hostname. When federating between home servers, the user_id
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is used to uniquely identify users across multiple home servers.
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Room ID:
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The room_id@host style ID for the room. When rooms are created, the client either
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specifies or is allocated a room ID. This room ID must be used to send messages
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in that room. Like with clients, there may be multiple rooms with the same ID
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across multiple home servers. The room_id is used to uniquely identify a room
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when federating.
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Global message ID:
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The globally unique ID for a message. This ID is formed from the msg_id, the
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client's user_id and the room_id. This uniquely identifies any
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message. It is represented with '-' as the delimeter between IDs. The
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global_msg_id is of the form: room_id-user_id-msg_id
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REST API and the Event Stream
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-----------------------------
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Clients send data to the server via a RESTful API. They can receive data via
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this API or from an event stream. An event stream is a special path which
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streams all events the client may be interested in. This makes it easy to
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immediately receive updates from the REST API. All data is represented as JSON.
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Pagination streaming API
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========================
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Clients are often interested in very large datasets. The data itself could
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be 1000s of messages in a given room, 1000s of rooms in a public room list, or
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1000s of events (presence, typing, messages, etc) in the system. It is not
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practical to send vast quantities of data to the client every time they
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request a list of public rooms for example. There needs to be a way to show a
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subset of this data, and apply various filters to it. This is what the pagination
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streaming API is. This API defines standard request/response parameters which
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can be used when navigating this stream of data.
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Pagination Request Query Parameters
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-----------------------------------
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Clients may wish to paginate results from the event stream, or other sources of
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information where the amount of information may be a problem,
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e.g. in a room with 10,000s messages. The pagination query parameters provide a
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way to navigate a 'window' around a large set of data. These
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parameters are only valid for GET requests.
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S e r v e r - s i d e d a t a
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|-------------------------------------------------|
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START ^ ^ END
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|_______________|
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Client-extraction
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'START' and 'END' are magic token values which specify the start and end of the
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dataset respectively.
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Query parameters:
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from : $streamtoken - The opaque token to start streaming from.
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to : $streamtoken - The opaque token to end streaming at. Typically,
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clients will not know the item of data to end at, so this will usually be
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START or END.
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limit : integer - An integer representing the maximum number of items to
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return.
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For example, the event stream has events E1 -> E15. The client wants the last 5
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events and doesn't know any previous events:
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S E
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|-E1-E2-E3-E4-E5-E6-E7-E8-E9-E10-E11-E12-E13-E14-E15-|
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| _____| |
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|__________________ | ___________________|
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GET /events?to=START&limit=5&from=END
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Returns:
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E15,E14,E13,E12,E11
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Another example: a public room list has rooms R1 -> R17. The client is showing 5
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rooms at a time on screen, and is on page 2. They want to
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now show page 3 (rooms R11 -> 15):
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S E
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| 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | stream token
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|-R1-R2-R3-R4-R5-R6-R7-R8-R9-R10-R11-R12-R13-R14-R15-R16-R17| room
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|____________| |________________|
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Currently |
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viewing |
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GET /rooms/list?from=9&to=END&limit=5
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Returns: R11,R12,R13,R14,R15
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Note that tokens are treated in an *exclusive*, not inclusive, manner. The end
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token from the intial request was '9' which corresponded to R10. When the 2nd
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request was made, R10 did not appear again, even though from=9 was specified. If
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you know the token, you already have the data.
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Pagination Response
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-------------------
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Responses to pagination requests MUST follow the format:
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{
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"chunk": [ ... , Responses , ... ],
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"start" : $streamtoken,
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"end" : $streamtoken
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}
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Where $streamtoken is an opaque token which can be used in another query to
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get the next set of results. The "start" and "end" keys can only be omitted if
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the complete dataset is provided in "chunk".
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If the client wants earlier results, they should use from=$start_streamtoken,
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to=START. Likewise, if the client wants later results, they should use
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from=$end_streamtoken, to=END.
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Unless specified, the default pagination parameters are from=START, to=END,
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without a limit set. This allows you to hit an API like
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/events without any query parameters to get everything.
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The Event Stream
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----------------
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The event stream returns events using the pagination streaming API. When the
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client disconnects for a while and wants to reconnect to the event stream, they
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should specify from=$end_streamtoken. This lets the server know where in the
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event stream the client is. These tokens are completely opaque, and the client
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cannot infer anything from them.
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GET /events?from=$LAST_STREAM_TOKEN
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REST Path: /events
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Returns (success): A JSON array of Event Data.
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Returns (failure): An Error Response
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LAST_STREAM_TOKEN is the last stream token obtained from the event stream. If the
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client is connecting for the first time and does not know any stream tokens,
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they can use "START" to request all events from the start. For more information
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on this, see "Pagination Request Query Parameters".
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The event stream supports shortpoll and longpoll with the "timeout" query
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parameter. This parameter specifies the number of milliseconds the server should
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hold onto the connection waiting for incoming events. If no events occur in this
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period, the connection will be closed and an empty chunk will be returned. To
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use shortpoll, specify "timeout=0".
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Event Data
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----------
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This is a JSON object which looks like:
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{
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"event_id" : $EVENT_ID,
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"type" : $EVENT_TYPE,
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$URL_ARGS,
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"content" : {
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$EVENT_CONTENT
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}
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}
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EVENT_ID
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An ID identifying this event. This is so duplicate events can be suppressed on
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the client.
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EVENT_TYPE
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The namespaced event type (m.*)
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URL_ARGS
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Path specific data from the REST API.
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EVENT_CONTENT
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The event content, matching the REST content PUT previously.
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Events are differentiated via the event type "type" key. This is the type of
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event being received. This can be expanded upon by using different namespaces.
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Every event MUST have a 'type' key.
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Most events will have a corresponding REST URL. This URL will generally have
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data in it to represent the resource being modified,
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e.g. /rooms/$room_id. The event data will contain extra top-level keys to expose
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this information to clients listening on an event
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stream. The event content maps directly to the contents submitted via the REST
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API.
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For example:
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Event Type: m.example.room.members
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REST Path: /examples/room/$room_id/members/$user_id
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REST Content: { "membership" : "invited" }
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is represented in the event stream as:
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{
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"event_id" : "e_some_event_id",
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"type" : "m.example.room.members",
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"room_id" : $room_id,
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"user_id" : $user_id,
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"content" : {
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"membership" : "invited"
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}
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}
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As convention, the URL variable "$varname" will map directly onto the name
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of the JSON key "varname".
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Error Responses
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---------------
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If the client sends an invalid request, the server MAY respond with an error
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response. This is of the form:
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{
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"error" : "string",
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"errcode" : "string"
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}
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The 'error' string will be a human-readable error message, usually a sentence
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explaining what went wrong.
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The 'errcode' string will be a unique string which can be used to handle an
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error message e.g. "M_FORBIDDEN". These error codes should have their namespace
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first in ALL CAPS, followed by a single _. For example, if there was a custom
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namespace com.mydomain.here, and a "FORBIDDEN" code, the error code should look
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like "COM.MYDOMAIN.HERE_FORBIDDEN". There may be additional keys depending on
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the error, but the keys 'error' and 'errcode' will always be present.
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Some standard error codes are below:
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M_FORBIDDEN:
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Forbidden access, e.g. bad access token, failed login.
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M_BAD_JSON:
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Request contained valid JSON, but it was malformed in some way, e.g. missing
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required keys, invalid values for keys.
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M_NOT_JSON:
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Request did not contain valid JSON.
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M_NOT_FOUND:
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No resource was found for this request.
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Some requests have unique error codes:
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M_USER_IN_USE:
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Encountered when trying to register a user ID which has been taken.
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M_ROOM_IN_USE:
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Encountered when trying to create a room which has been taken.
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M_BAD_PAGINATION:
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Encountered when specifying bad pagination values to a Pagination Streaming API.
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========
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REST API
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========
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All content must be application/json. Some keys are required, while others are
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optional. Unless otherwise specified,
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all HTTP PUT/POST/DELETEs will return a 200 OK with an empty response body on
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success, and a 4xx/5xx with an optional Error Response on failure. When sending
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data, if there are no keys to send, an empty JSON object should be sent.
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All POST/PUT/GET/DELETE requests MUST have an 'access_token' query parameter to
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allow the server to authenticate the client. All
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POST requests MUST be submitted as application/json.
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All paths MUST be namespaced by the version of the API being used. This should
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be:
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/matrix/client/api/v1
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All REST paths in this section MUST be prefixed with this. E.g.
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REST Path: /rooms/$room_id
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Absolute Path: /matrix/client/api/v1/rooms/$room_id
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Registration
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============
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Clients must register with the server in order to use the service. After
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registering, the client will be given an
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access token which must be used in ALL requests as a query parameter
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'access_token'.
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Registering for an account
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--------------------------
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POST /register
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With: A JSON object containing the key "user_id" which contains the desired
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user_id, or an empty JSON object to have the server allocate a user_id
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automatically.
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Returns (success): 200 OK with a JSON object:
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{
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"user_id" : "string [user_id]",
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"access_token" : "string"
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}
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Returns (failure): An Error Response. M_USER_IN_USE if the user ID is taken.
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Unregistering an account
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------------------------
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POST /unregister
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With query parameters: access_token=$ACCESS_TOKEN
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Returns (success): 200 OK
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Returns (failure): An Error Response.
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Logging in to an existing account
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=================================
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If the client has already registered, they need to be able to login to their
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account. The home server may provide many different ways of logging in, such
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as user/password auth, login via a social network (OAuth), login by confirming
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a token sent to their email address, etc. This section does NOT define how home
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servers should authorise their users who want to login to their existing
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accounts. This section defines the standard interface which implementations
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should follow so that ANY client can login to ANY home server.
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The login process breaks down into the following:
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1: Get login process info.
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2: Submit the login stage credentials.
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3: Get access token or be told the next stage in the login process and repeat
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step 2.
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Getting login process info:
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GET /login
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Returns (success): 200 OK with LoginInfo.
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Returns (failure): An Error Response.
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Submitting the login stage credentials:
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POST /login
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With: LoginSubmission
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Returns (success): 200 OK with LoginResult
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Returns (failure): An Error Response
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Where LoginInfo is a JSON object which MUST have a "type" key which denotes the
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login type. If there are multiple login stages, this object MUST also contain a
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"stages" key, which has a JSON array of login types denoting all the steps in
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order to login, including the first stage which is in "type". This allows the
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client to make an informed decision as to whether or not they can natively
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handle the entire login process, or whether they should fallback (see below).
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Where LoginSubmission is a JSON object which MUST have a "type" key.
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Where LoginResult is a JSON object which MUST have either a "next" key OR an
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"access_token" key, depending if the login process is over or not. This object
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MUST have a "session" key if multiple POSTs need to be sent to /login.
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Fallback
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--------
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If the client does NOT know how to handle the given type, they should:
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GET /login/fallback
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This MUST return an HTML page which can perform the entire login process.
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Password-based
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--------------
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Type: "m.login.password"
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LoginSubmission:
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{
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"type": "m.login.password",
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"user": <user_id>,
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"password": <password>
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}
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Example:
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Assume you are @bob:matrix.org and you wish to login on another mobile device.
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First, you GET /login which returns:
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{
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"type": "m.login.password"
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}
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Your client knows how to handle this, so your client prompts the user to enter
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their username and password. This is then submitted:
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{
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"type": "m.login.password",
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"user": "@bob:matrix.org",
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"password": "monkey"
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}
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The server checks this, finds it is valid, and returns:
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{
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"access_token": "abcdef0123456789"
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}
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OAuth2-based
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||
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------------
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||
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Type: "m.login.oauth2"
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This is a multi-stage login.
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LoginSubmission:
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{
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"type": "m.login.oauth2",
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"user": <user_id>
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}
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Returns:
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{
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"uri": <Authorization Request uri OR service selection uri>
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}
|
||
|
|
||
|
The home server acts as a 'confidential' Client for the purposes of OAuth2.
|
||
|
|
||
|
If the uri is a "sevice selection uri", it is a simple page which prompts the
|
||
|
user to choose which service to authorize with. On selection of a service, they
|
||
|
link through to Authorization Request URIs. If there is only 1 service which the
|
||
|
home server accepts when logging in, this indirection can be skipped and the
|
||
|
"uri" key can be the Authorization Request URI.
|
||
|
|
||
|
The client visits the Authorization Request URI, which then shows the OAuth2
|
||
|
Allow/Deny prompt. Hitting 'Allow' returns the redirect URI with the auth code.
|
||
|
Home servers can choose any path for the redirect URI. The client should visit
|
||
|
the redirect URI, which will then finish the OAuth2 login process, granting the
|
||
|
home server an access token for the chosen service. When the home server gets
|
||
|
this access token, it knows that the cilent has authed with the 3rd party, and
|
||
|
so can return a LoginResult.
|
||
|
|
||
|
The OAuth redirect URI (with auth code) MUST return a LoginResult.
|
||
|
|
||
|
Example:
|
||
|
Assume you are @bob:matrix.org and you wish to login on another mobile device.
|
||
|
First, you GET /login which returns:
|
||
|
{
|
||
|
"type": "m.login.oauth2"
|
||
|
}
|
||
|
Your client knows how to handle this, so your client prompts the user to enter
|
||
|
their username. This is then submitted:
|
||
|
{
|
||
|
"type": "m.login.oauth2",
|
||
|
"user": "@bob:matrix.org"
|
||
|
}
|
||
|
The server only accepts auth from Google, so returns the Authorization Request
|
||
|
URI for Google:
|
||
|
{
|
||
|
"uri": "https://accounts.google.com/o/oauth2/auth?response_type=code&
|
||
|
client_id=CLIENT_ID&redirect_uri=REDIRECT_URI&scope=photos"
|
||
|
}
|
||
|
The client then visits this URI and authorizes the home server. The client then
|
||
|
visits the REDIRECT_URI with the auth code= query parameter which returns:
|
||
|
{
|
||
|
"access_token": "0123456789abcdef"
|
||
|
}
|
||
|
|
||
|
Email-based (code)
|
||
|
------------------
|
||
|
Type: "m.login.email.code"
|
||
|
This is a multi-stage login.
|
||
|
|
||
|
First LoginSubmission:
|
||
|
{
|
||
|
"type": "m.login.email.code",
|
||
|
"user": <user_id>
|
||
|
"email": <email address>
|
||
|
}
|
||
|
Returns:
|
||
|
{
|
||
|
"session": <session id>
|
||
|
}
|
||
|
|
||
|
The email contains a code which must be sent in the next LoginSubmission:
|
||
|
{
|
||
|
"type": "m.login.email.code",
|
||
|
"session": <session id>,
|
||
|
"code": <code in email sent>
|
||
|
}
|
||
|
Returns:
|
||
|
{
|
||
|
"access_token": <access token>
|
||
|
}
|
||
|
|
||
|
Example:
|
||
|
Assume you are @bob:matrix.org and you wish to login on another mobile device.
|
||
|
First, you GET /login which returns:
|
||
|
{
|
||
|
"type": "m.login.email.code"
|
||
|
}
|
||
|
Your client knows how to handle this, so your client prompts the user to enter
|
||
|
their email address. This is then submitted:
|
||
|
{
|
||
|
"type": "m.login.email.code",
|
||
|
"user": "@bob:matrix.org",
|
||
|
"email": "bob@mydomain.com"
|
||
|
}
|
||
|
The server confirms that bob@mydomain.com is linked to @bob:matrix.org, then
|
||
|
sends an email to this address and returns:
|
||
|
{
|
||
|
"session": "ewuigf7462"
|
||
|
}
|
||
|
The client's screen changes to a code submission page. The email arrives and it
|
||
|
says something to the effect of "please enter 2348623 into the app". This is
|
||
|
the submitted along with the session:
|
||
|
{
|
||
|
"type": "m.login.email.code",
|
||
|
"session": "ewuigf7462",
|
||
|
"code": "2348623"
|
||
|
}
|
||
|
The server accepts this and returns:
|
||
|
{
|
||
|
"access_token": "abcdef0123456789"
|
||
|
}
|
||
|
|
||
|
Email-based (url)
|
||
|
-----------------
|
||
|
Type: "m.login.email.url"
|
||
|
This is a multi-stage login.
|
||
|
|
||
|
First LoginSubmission:
|
||
|
{
|
||
|
"type": "m.login.email.url",
|
||
|
"user": <user_id>
|
||
|
"email": <email address>
|
||
|
}
|
||
|
Returns:
|
||
|
{
|
||
|
"session": <session id>
|
||
|
}
|
||
|
|
||
|
The email contains a URL which must be clicked. After it has been clicked, the
|
||
|
client should perform a request:
|
||
|
{
|
||
|
"type": "m.login.email.code",
|
||
|
"session": <session id>
|
||
|
}
|
||
|
Returns:
|
||
|
{
|
||
|
"access_token": <access token>
|
||
|
}
|
||
|
|
||
|
Example:
|
||
|
Assume you are @bob:matrix.org and you wish to login on another mobile device.
|
||
|
First, you GET /login which returns:
|
||
|
{
|
||
|
"type": "m.login.email.url"
|
||
|
}
|
||
|
Your client knows how to handle this, so your client prompts the user to enter
|
||
|
their email address. This is then submitted:
|
||
|
{
|
||
|
"type": "m.login.email.url",
|
||
|
"user": "@bob:matrix.org",
|
||
|
"email": "bob@mydomain.com"
|
||
|
}
|
||
|
The server confirms that bob@mydomain.com is linked to @bob:matrix.org, then
|
||
|
sends an email to this address and returns:
|
||
|
{
|
||
|
"session": "ewuigf7462"
|
||
|
}
|
||
|
The client then starts polling the server with the following:
|
||
|
{
|
||
|
"type": "m.login.email.url",
|
||
|
"session": "ewuigf7462"
|
||
|
}
|
||
|
(Alternatively, the server could send the device a push notification when the
|
||
|
email has been validated). The email arrives and it contains a URL to click on.
|
||
|
The user clicks on the which completes the login process with the server. The
|
||
|
next time the client polls, it returns:
|
||
|
{
|
||
|
"access_token": "abcdef0123456789"
|
||
|
}
|
||
|
|
||
|
N-Factor auth
|
||
|
-------------
|
||
|
Multiple login stages can be combined with the "next" key in the LoginResult.
|
||
|
|
||
|
Example:
|
||
|
A server demands an email.code then password auth before logging in. First, the
|
||
|
client performs a GET /login which returns:
|
||
|
{
|
||
|
"type": "m.login.email.code",
|
||
|
"stages": ["m.login.email.code", "m.login.password"]
|
||
|
}
|
||
|
The client performs the email login (See "Email-based (code)"), but instead of
|
||
|
returning an access_token, it returns:
|
||
|
{
|
||
|
"next": "m.login.password"
|
||
|
}
|
||
|
The client then presents a user/password screen and the login continues until
|
||
|
this is complete (See "Password-based"), which then returns the "access_token".
|
||
|
|
||
|
Rooms
|
||
|
=====
|
||
|
A room is a conceptual place where users can send and receive messages. Rooms
|
||
|
can be created, joined and left. Messages are sent
|
||
|
to a room, and all participants in that room will receive the message. Rooms are
|
||
|
uniquely identified via the room_id.
|
||
|
|
||
|
Creating a room (with a room ID)
|
||
|
--------------------------------
|
||
|
Event Type: m.room.create [TODO(kegan): Do we generate events for this?]
|
||
|
REST Path: /rooms/$room_id
|
||
|
Valid methods: PUT
|
||
|
Required keys: None.
|
||
|
Optional keys:
|
||
|
visibility : [public|private] - Set whether this room shows up in the public
|
||
|
room list.
|
||
|
Returns:
|
||
|
On Failure: MAY return a suggested alternative room ID if this room ID is
|
||
|
taken.
|
||
|
{
|
||
|
suggested_room_id : $new_room_id
|
||
|
error : "Room already in use."
|
||
|
errcode : "M_ROOM_IN_USE"
|
||
|
}
|
||
|
|
||
|
|
||
|
Creating a room (without a room ID)
|
||
|
-----------------------------------
|
||
|
Event Type: m.room.create [TODO(kegan): Do we generate events for this?]
|
||
|
REST Path: /rooms
|
||
|
Valid methods: POST
|
||
|
Required keys: None.
|
||
|
Optional keys:
|
||
|
visibility : [public|private] - Set whether this room shows up in the public
|
||
|
room list.
|
||
|
Returns:
|
||
|
On Success: The allocated room ID. Additional information about the room
|
||
|
such as the visibility MAY be included as extra keys in this response.
|
||
|
{
|
||
|
room_id : $room_id
|
||
|
}
|
||
|
|
||
|
Setting the topic for a room
|
||
|
----------------------------
|
||
|
Event Type: m.room.topic
|
||
|
REST Path: /rooms/$room_id/topic
|
||
|
Valid methods: GET/PUT
|
||
|
Required keys:
|
||
|
topic : $topicname - Set the topic to $topicname in room $room_id.
|
||
|
|
||
|
|
||
|
See a list of public rooms
|
||
|
--------------------------
|
||
|
REST Path: /public/rooms?pagination_query_parameters
|
||
|
Valid methods: GET
|
||
|
This API can use pagination query parameters.
|
||
|
Returns:
|
||
|
{
|
||
|
"chunk" : JSON array of RoomInfo JSON objects - Required.
|
||
|
"start" : "string (start token)" - See Pagination Response.
|
||
|
"end" : "string (end token)" - See Pagination Response.
|
||
|
"total" : integer - Optional. The total number of rooms.
|
||
|
}
|
||
|
|
||
|
RoomInfo: Information about a single room.
|
||
|
Servers MUST send the key: room_id
|
||
|
Servers MAY send the keys: topic, num_members
|
||
|
{
|
||
|
"room_id" : "string",
|
||
|
"topic" : "string",
|
||
|
"num_members" : integer
|
||
|
}
|
||
|
|
||
|
Room Members
|
||
|
============
|
||
|
|
||
|
Invite/Joining/Leaving a room
|
||
|
-----------------------------
|
||
|
Event Type: m.room.member
|
||
|
REST Path: /rooms/$room_id/members/$user_id/state
|
||
|
Valid methods: PUT/GET/DELETE
|
||
|
Required keys:
|
||
|
membership : [join|invite] - The membership state of $user_id in room
|
||
|
$room_id.
|
||
|
|
||
|
Where:
|
||
|
join - Indicate you ($user_id) are joining the room $room_id.
|
||
|
invite - Indicate that $user_id has been invited to room $room_id.
|
||
|
|
||
|
User $user_id can leave room $room_id by DELETEing this path.
|
||
|
|
||
|
Checking the user list of a room
|
||
|
--------------------------------
|
||
|
REST Path: /rooms/$room_id/members/list
|
||
|
This API can use pagination query parameters.
|
||
|
Valid methods: GET
|
||
|
Returns:
|
||
|
A pagination response with chunk data as m.room.member events.
|
||
|
|
||
|
Messages
|
||
|
========
|
||
|
Users send messages to other users in rooms. These messages may be text, images,
|
||
|
video, etc. Clients may also want to acknowledge messages by sending feedback,
|
||
|
in the form of delivery/read receipts.
|
||
|
|
||
|
Server-attached keys
|
||
|
--------------------
|
||
|
The server MAY attach additional keys to messages and feedback. If a client
|
||
|
submits keys with the same name, they will be clobbered by
|
||
|
the server.
|
||
|
|
||
|
Required keys:
|
||
|
from : "string [user_id]"
|
||
|
The user_id of the user who sent the message/feedback.
|
||
|
|
||
|
Optional keys:
|
||
|
hsob_ts : integer
|
||
|
A timestamp (ms resolution) representing when the message/feedback got to the
|
||
|
sender's home server ("home server outbound timestamp").
|
||
|
|
||
|
hsib_ts : integer
|
||
|
A timestamp (ms resolution) representing when the
|
||
|
message/feedback got to the receiver's home server ("home server inbound
|
||
|
timestamp"). This may be the same as hsob_ts if the sender/receiver are on the
|
||
|
same home server.
|
||
|
|
||
|
Sending messages
|
||
|
----------------
|
||
|
Event Type: m.room.message
|
||
|
REST Path: /rooms/$room_id/messages/$from/$msg_id
|
||
|
Valid methods: GET/PUT
|
||
|
URL parameters:
|
||
|
$from : user_id - The sender's user_id. This value will be clobbered by the
|
||
|
server before sending.
|
||
|
Required keys:
|
||
|
msgtype: [m.text|m.emote|m.image|m.audio|m.video|m.location|m.file] -
|
||
|
The type of message. Not to be confused with the Event 'type'.
|
||
|
Optional keys:
|
||
|
sender_ts : integer - A timestamp (ms resolution) representing the
|
||
|
wall-clock time when the message was sent from the client.
|
||
|
Reserved keys:
|
||
|
body : "string" - The human readable string for compatibility with clients
|
||
|
which cannot process a given msgtype. This key is optional, but
|
||
|
if it is included, it MUST be human readable text
|
||
|
describing the message. See individual msgtypes for more
|
||
|
info on what this means in practice.
|
||
|
|
||
|
Each msgtype may have required fields of their own.
|
||
|
|
||
|
msgtype: m.text
|
||
|
----------------
|
||
|
Required keys:
|
||
|
body : "string" - The body of the message.
|
||
|
Optional keys:
|
||
|
None.
|
||
|
|
||
|
msgtype: m.emote
|
||
|
-----------------
|
||
|
Required keys:
|
||
|
body : "string" - *tries to come up with a witty explanation*.
|
||
|
Optional keys:
|
||
|
None.
|
||
|
|
||
|
msgtype: m.image
|
||
|
-----------------
|
||
|
Required keys:
|
||
|
url : "string" - The URL to the image.
|
||
|
Optional keys:
|
||
|
body : "string" - info : JSON object (ImageInfo) - The image info for image
|
||
|
referred to in 'url'.
|
||
|
thumbnail_url : "string" - The URL to the thumbnail.
|
||
|
thumbnail_info : JSON object (ImageInfo) - The image info for the image
|
||
|
referred to in 'thumbnail_url'.
|
||
|
|
||
|
ImageInfo: Information about an image.
|
||
|
{
|
||
|
"size" : integer (size of image in bytes),
|
||
|
"w" : integer (width of image in pixels),
|
||
|
"h" : integer (height of image in pixels),
|
||
|
"mimetype" : "string (e.g. image/jpeg)"
|
||
|
}
|
||
|
|
||
|
Interpretation of 'body' key: The alt text of the image, or some kind of content
|
||
|
description for accessibility e.g. "image attachment".
|
||
|
|
||
|
msgtype: m.audio
|
||
|
-----------------
|
||
|
Required keys:
|
||
|
url : "string" - The URL to the audio.
|
||
|
Optional keys:
|
||
|
info : JSON object (AudioInfo) - The audio info for the audio referred to in
|
||
|
'url'.
|
||
|
|
||
|
AudioInfo: Information about a piece of audio.
|
||
|
{
|
||
|
"mimetype" : "string (e.g. audio/aac)",
|
||
|
"size" : integer (size of audio in bytes),
|
||
|
"duration" : integer (duration of audio in milliseconds)
|
||
|
}
|
||
|
|
||
|
Interpretation of 'body' key: A description of the audio e.g. "Bee Gees -
|
||
|
Stayin' Alive", or some kind of content description for accessibility e.g.
|
||
|
"audio attachment".
|
||
|
|
||
|
msgtype: m.video
|
||
|
-----------------
|
||
|
Required keys:
|
||
|
url : "string" - The URL to the video.
|
||
|
Optional keys:
|
||
|
info : JSON object (VideoInfo) - The video info for the video referred to in
|
||
|
'url'.
|
||
|
|
||
|
VideoInfo: Information about a video.
|
||
|
{
|
||
|
"mimetype" : "string (e.g. video/mp4)",
|
||
|
"size" : integer (size of video in bytes),
|
||
|
"duration" : integer (duration of video in milliseconds),
|
||
|
"w" : integer (width of video in pixels),
|
||
|
"h" : integer (height of video in pixels),
|
||
|
"thumbnail_url" : "string (URL to image)",
|
||
|
"thumbanil_info" : JSON object (ImageInfo)
|
||
|
}
|
||
|
|
||
|
Interpretation of 'body' key: A description of the video e.g. "Gangnam style",
|
||
|
or some kind of content description for accessibility e.g. "video attachment".
|
||
|
|
||
|
msgtype: m.location
|
||
|
--------------------
|
||
|
Required keys:
|
||
|
geo_uri : "string" - The geo URI representing the location.
|
||
|
Optional keys:
|
||
|
thumbnail_url : "string" - The URL to a thumnail of the location being
|
||
|
represented.
|
||
|
thumbnail_info : JSON object (ImageInfo) - The image info for the image
|
||
|
referred to in 'thumbnail_url'.
|
||
|
|
||
|
Interpretation of 'body' key: A description of the location e.g. "Big Ben,
|
||
|
London, UK", or some kind of content description for accessibility e.g.
|
||
|
"location attachment".
|
||
|
|
||
|
|
||
|
Sending feedback
|
||
|
----------------
|
||
|
When you receive a message, you may want to send delivery receipt to let the
|
||
|
sender know that the message arrived. You may also want to send a read receipt
|
||
|
when the user has read the message. These receipts are collectively known as
|
||
|
'feedback'.
|
||
|
|
||
|
Event Type: m.room.message.feedback
|
||
|
REST Path: /rooms/$room_id/messages/$msgfrom/$msg_id/feedback/$from/$feedback
|
||
|
Valid methods: GET/PUT
|
||
|
URL parameters:
|
||
|
$msgfrom - The sender of the message's user_id.
|
||
|
$from : user_id - The sender of the feedback's user_id. This value will be
|
||
|
clobbered by the server before sending.
|
||
|
$feedback : [d|r] - Specify if this is a [d]elivery or [r]ead receipt.
|
||
|
Required keys:
|
||
|
None.
|
||
|
Optional keys:
|
||
|
sender_ts : integer - A timestamp (ms resolution) representing the
|
||
|
wall-clock time when the receipt was sent from the client.
|
||
|
|
||
|
Receiving messages (bulk/pagination)
|
||
|
------------------------------------
|
||
|
Event Type: m.room.message
|
||
|
REST Path: /rooms/$room_id/messages/list
|
||
|
Valid methods: GET
|
||
|
Query Parameters:
|
||
|
feedback : [true|false] - Specify if feedback should be bundled with each
|
||
|
message.
|
||
|
This API can use pagination query parameters.
|
||
|
Returns:
|
||
|
A JSON array of Event Data in "chunk" (see Pagination Response). If the
|
||
|
"feedback" parameter was set, the Event Data will also contain a "feedback"
|
||
|
key which contains a JSON array of feedback, with each element as Event Data
|
||
|
with compressed feedback for this message.
|
||
|
|
||
|
Event Data with compressed feedback is a special type of feedback with
|
||
|
contextual keys removed. It is designed to limit the amount of redundant data
|
||
|
being sent for feedback. This removes the type, event_id, room ID,
|
||
|
message sender ID and message ID keys.
|
||
|
|
||
|
ORIGINAL (via event streaming)
|
||
|
{
|
||
|
"event_id":"e1247632487",
|
||
|
"type":"m.room.message.feedback",
|
||
|
"from":"string [user_id]",
|
||
|
"feedback":"string [d|r]",
|
||
|
"room_id":"$room_id",
|
||
|
"msg_id":"$msg_id",
|
||
|
"msgfrom":"$msgfromid",
|
||
|
"content":{
|
||
|
"sender_ts":139880943
|
||
|
}
|
||
|
}
|
||
|
|
||
|
COMPRESSED (via /messages/list)
|
||
|
{
|
||
|
"from":"string [user_id]",
|
||
|
"feedback":"string [d|r]",
|
||
|
"content":{
|
||
|
"sender_ts":139880943
|
||
|
}
|
||
|
}
|
||
|
|
||
|
When you join a room $room_id, you may want the last 10 messages with feedback.
|
||
|
This is represented as:
|
||
|
GET
|
||
|
/rooms/$room_id/messages/list?from=END&to=START&limit=10&feedback=true
|
||
|
|
||
|
You may want to get 10 messages even earlier than that without feedback. If the
|
||
|
start stream token from the previous request was stok_019173, this request would
|
||
|
be:
|
||
|
GET
|
||
|
/rooms/$room_id/messages/list?from=stok_019173&to=START&limit=10&
|
||
|
feedback=false
|
||
|
|
||
|
NOTE: Care must be taken when using this API in conjunction with event
|
||
|
streaming. It is possible that this will return a message which will
|
||
|
then come down the event stream, resulting in a duplicate message. Clients
|
||
|
should clobber based on the global message ID, or event ID.
|
||
|
|
||
|
|
||
|
Get current state for all rooms (aka IM Initial Sync API)
|
||
|
-------------------------------
|
||
|
REST Path: /im/sync
|
||
|
Valid methods: GET
|
||
|
This API can use pagination query parameters. Pagination is applied on a per
|
||
|
*room* basis. E.g. limit=1 means "get 1 message for each room" and not "get 1
|
||
|
room's messages". If there is no limit, all messages for all rooms will be
|
||
|
returned.
|
||
|
If you want 1 room's messages, see "Receiving messages (bulk/pagination)".
|
||
|
Additional query parameters:
|
||
|
feedback: [true] - Bundles feedback with messages.
|
||
|
Returns:
|
||
|
An array of RoomStateInfo.
|
||
|
|
||
|
RoomStateInfo: A snapshot of information about a single room.
|
||
|
{
|
||
|
"room_id" : "string",
|
||
|
"membership" : "string [join|invite]",
|
||
|
"messages" : {
|
||
|
"start": "string",
|
||
|
"end": "string",
|
||
|
"chunk":
|
||
|
m.room.message pagination stream events (with feedback if specified),
|
||
|
this is the same as "Receiving messages (bulk/pagination)".
|
||
|
}
|
||
|
}
|
||
|
The "membership" key is the calling user's membership state in the given
|
||
|
"room_id". The "messages" key may be omitted if the "membership" value is
|
||
|
"invite". Additional keys may be added to the top-level object, such as:
|
||
|
"topic" : "string" - The topic for the room in question.
|
||
|
"room_image_url" : "string" - The URL of the room image if specified.
|
||
|
"num_members" : integer - The number of members in the room.
|
||
|
|
||
|
|
||
|
Profiles
|
||
|
========
|
||
|
|
||
|
Getting/Setting your own displayname
|
||
|
------------------------------------
|
||
|
REST Path: /profile/$user_id/displayname
|
||
|
Valid methods: GET/PUT
|
||
|
Required keys:
|
||
|
displayname : The displayname text
|
||
|
|
||
|
Getting/Setting your own avatar image URL
|
||
|
-----------------------------------------
|
||
|
The homeserver does not currently store the avatar image itself, but offers
|
||
|
storage for the user to specify a web URL that points at the required image,
|
||
|
leaving it up to clients to fetch it themselves.
|
||
|
REST Path: /profile/$user_id/avatar_url
|
||
|
Valid methods: GET/PUT
|
||
|
Required keys:
|
||
|
avatar_url : The URL path to the required image
|
||
|
|
||
|
Getting other user's profile information
|
||
|
----------------------------------------
|
||
|
Either of the above REST methods may be used to fetch other user's profile
|
||
|
information by the client, either on other local users on the same homeserver or
|
||
|
for users from other servers entirely.
|
||
|
|
||
|
|
||
|
Presence
|
||
|
========
|
||
|
|
||
|
In the following messages, the presence state is an integer enumeration of the
|
||
|
following states:
|
||
|
0 : OFFLINE
|
||
|
1 : BUSY
|
||
|
2 : ONLINE
|
||
|
3 : FREE_TO_CHAT
|
||
|
|
||
|
Aside from OFFLINE, the protocol doesn't assign any special meaning to these
|
||
|
states; they are provided as an approximate signal for users to give to other
|
||
|
users and for clients to present them in some way that may be useful. Clients
|
||
|
could have different behaviours for different states of the user's presence, for
|
||
|
example to decide how much prominence or sound to use for incoming event
|
||
|
notifications.
|
||
|
|
||
|
Getting/Setting your own presence state
|
||
|
---------------------------------------
|
||
|
REST Path: /presence/$user_id/status
|
||
|
Valid methods: GET/PUT
|
||
|
Required keys:
|
||
|
state : [0|1|2|3] - The user's new presence state
|
||
|
Optional keys:
|
||
|
status_msg : text string provided by the user to explain their status
|
||
|
|
||
|
Fetching your presence list
|
||
|
---------------------------
|
||
|
REST Path: /presence_list/$user_id
|
||
|
Valid methods: GET/(post)
|
||
|
Returns:
|
||
|
An array of presence list entries. Each entry is an object with the
|
||
|
following keys:
|
||
|
{
|
||
|
"user_id" : string giving the observed user's ID
|
||
|
"state" : int giving their status
|
||
|
"status_msg" : optional text string
|
||
|
"displayname" : optional text string from the user's profile
|
||
|
"avatar_url" : optional text string from the user's profile
|
||
|
}
|
||
|
|
||
|
Maintaining your presence list
|
||
|
------------------------------
|
||
|
REST Path: /presence_list/$user_id
|
||
|
Valid methods: POST/(get)
|
||
|
With: A JSON object optionally containing either of the following keys:
|
||
|
"invite" : a list of strings giving user IDs to invite for presence
|
||
|
subscription
|
||
|
"drop" : a list of strings giving user IDs to remove from your presence
|
||
|
list
|
||
|
|
||
|
Receiving presence update events
|
||
|
--------------------------------
|
||
|
Event Type: m.presence
|
||
|
Keys of the event's content are the same as those returned by the presence
|
||
|
list.
|
||
|
|
||
|
Examples
|
||
|
========
|
||
|
|
||
|
The following example is the story of "bob", who signs up at "sy.org" and joins
|
||
|
the public room "room_beta@sy.org". They get the 2 most recent
|
||
|
messages (with feedback) in that room and then send a message in that room.
|
||
|
|
||
|
For context, here is the complete chat log for room_beta@sy.org:
|
||
|
|
||
|
Room: "Hello world" (room_beta@sy.org)
|
||
|
Members: (2) alice@randomhost.org, friend_of_alice@randomhost.org
|
||
|
Messages:
|
||
|
alice@randomhost.org : hi friend!
|
||
|
[friend_of_alice@randomhost.org DELIVERED]
|
||
|
alice@randomhost.org : you're my only friend
|
||
|
[friend_of_alice@randomhost.org DELIVERED]
|
||
|
alice@randomhost.org : afk
|
||
|
[friend_of_alice@randomhost.org DELIVERED]
|
||
|
[ bob@sy.org joins ]
|
||
|
bob@sy.org : Hi everyone
|
||
|
[ alice@randomhost.org changes the topic to "FRIENDS ONLY" ]
|
||
|
alice@randomhost.org : Hello!!!!
|
||
|
alice@randomhost.org : Let's go to another room
|
||
|
alice@randomhost.org : You're not my friend
|
||
|
[ alice@randomhost.org invites bob@sy.org to the room
|
||
|
commoners@randomhost.org]
|
||
|
|
||
|
|
||
|
REGISTER FOR AN ACCOUNT
|
||
|
POST: /register
|
||
|
Content: {}
|
||
|
Returns: { "user_id" : "bob@sy.org" , "access_token" : "abcdef0123456789" }
|
||
|
|
||
|
GET PUBLIC ROOM LIST
|
||
|
GET: /rooms/list?access_token=abcdef0123456789
|
||
|
Returns:
|
||
|
{
|
||
|
"total":3,
|
||
|
"chunk":
|
||
|
[
|
||
|
{ "room_id":"room_alpha@sy.org", "topic":"I am a fish" },
|
||
|
{ "room_id":"room_beta@sy.org", "topic":"Hello world" },
|
||
|
{ "room_id":"room_xyz@sy.org", "topic":"Goodbye cruel world" }
|
||
|
]
|
||
|
}
|
||
|
|
||
|
JOIN ROOM room_beta@sy.org
|
||
|
PUT
|
||
|
/rooms/room_beta%40sy.org/members/bob%40sy.org/state?
|
||
|
access_token=abcdef0123456789
|
||
|
Content: { "membership" : "join" }
|
||
|
Returns: 200 OK
|
||
|
|
||
|
GET LATEST 2 MESSAGES WITH FEEDBACK
|
||
|
GET
|
||
|
/rooms/room_beta%40sy.org/messages/list?from=END&to=START&limit=2&
|
||
|
feedback=true&access_token=abcdef0123456789
|
||
|
Returns:
|
||
|
{
|
||
|
"chunk":
|
||
|
[
|
||
|
{
|
||
|
"event_id":"01948374",
|
||
|
"type":"m.room.message",
|
||
|
"room_id":"room_beta@sy.org",
|
||
|
"msg_id":"avefifu",
|
||
|
"from":"alice@randomhost.org",
|
||
|
"hs_ts":139985736,
|
||
|
"content":{
|
||
|
"msgtype":"m.text",
|
||
|
"body":"afk"
|
||
|
}
|
||
|
"feedback": [
|
||
|
{
|
||
|
"from":"friend_of_alice@randomhost.org",
|
||
|
"feedback":"d",
|
||
|
"hs_ts":139985850,
|
||
|
"content":{
|
||
|
"sender_ts":139985843
|
||
|
}
|
||
|
}
|
||
|
]
|
||
|
},
|
||
|
{
|
||
|
"event_id":"028dfe8373",
|
||
|
"type":"m.room.message",
|
||
|
"room_id":"room_beta@sy.org",
|
||
|
"msg_id":"afhgfff",
|
||
|
"from":"alice@randomhost.org",
|
||
|
"hs_ts":139970006,
|
||
|
"content":{
|
||
|
"msgtype":"m.text",
|
||
|
"body":"you're my only friend"
|
||
|
}
|
||
|
"feedback": [
|
||
|
{
|
||
|
"from":"friend_of_alice@randomhost.org",
|
||
|
"feedback":"d",
|
||
|
"hs_ts":139970144,
|
||
|
"content":{
|
||
|
"sender_ts":139970122
|
||
|
}
|
||
|
}
|
||
|
]
|
||
|
},
|
||
|
],
|
||
|
"start": "stok_04823947",
|
||
|
"end": "etok_1426425"
|
||
|
}
|
||
|
|
||
|
SEND MESSAGE IN ROOM
|
||
|
PUT
|
||
|
/rooms/room_beta%40sy.org/messages/bob%40sy.org/m0001?
|
||
|
access_token=abcdef0123456789
|
||
|
Content: { "msgtype" : "text" , "body" : "Hi everyone" }
|
||
|
Returns: 200 OK
|
||
|
|
||
|
|
||
|
Checking the event stream for this user:
|
||
|
GET: /events?from=START&access_token=abcdef0123456789
|
||
|
Returns:
|
||
|
{
|
||
|
"chunk":
|
||
|
[
|
||
|
{
|
||
|
"event_id":"e10f3d2b",
|
||
|
"type":"m.room.member",
|
||
|
"room_id":"room_beta@sy.org",
|
||
|
"user_id":"bob@sy.org",
|
||
|
"content":{
|
||
|
"membership":"join"
|
||
|
}
|
||
|
},
|
||
|
{
|
||
|
"event_id":"1b352d32",
|
||
|
"type":"m.room.message",
|
||
|
"room_id":"room_beta@sy.org",
|
||
|
"msg_id":"m0001",
|
||
|
"from":"bob@sy.org",
|
||
|
"hs_ts":140193857,
|
||
|
"content":{
|
||
|
"msgtype":"m.text",
|
||
|
"body":"Hi everyone"
|
||
|
}
|
||
|
}
|
||
|
],
|
||
|
"start": "stok_9348635",
|
||
|
"end": "etok_1984723"
|
||
|
}
|
||
|
|
||
|
Client disconnects for a while and the topic is updated in this room, 3 new
|
||
|
messages arrive whilst offline, and bob is invited to another room.
|
||
|
|
||
|
GET /events?from=etok_1984723&access_token=abcdef0123456789
|
||
|
Returns:
|
||
|
{
|
||
|
"chunk":
|
||
|
[
|
||
|
{
|
||
|
"event_id":"feee0294",
|
||
|
"type":"m.room.topic",
|
||
|
"room_id":"room_beta@sy.org",
|
||
|
"from":"alice@randomhost.org",
|
||
|
"content":{
|
||
|
"topic":"FRIENDS ONLY",
|
||
|
}
|
||
|
},
|
||
|
{
|
||
|
"event_id":"a028bd9e",
|
||
|
"type":"m.room.message",
|
||
|
"room_id":"room_beta@sy.org",
|
||
|
"msg_id":"z839409",
|
||
|
"from":"alice@randomhost.org",
|
||
|
"hs_ts":140195000,
|
||
|
"content":{
|
||
|
"msgtype":"m.text",
|
||
|
"body":"Hello!!!"
|
||
|
}
|
||
|
},
|
||
|
{
|
||
|
"event_id":"49372d9e",
|
||
|
"type":"m.room.message",
|
||
|
"room_id":"room_beta@sy.org",
|
||
|
"msg_id":"z839410",
|
||
|
"from":"alice@randomhost.org",
|
||
|
"hs_ts":140196000,
|
||
|
"content":{
|
||
|
"msgtype":"m.text",
|
||
|
"body":"Let's go to another room"
|
||
|
}
|
||
|
},
|
||
|
{
|
||
|
"event_id":"10abdd01",
|
||
|
"type":"m.room.message",
|
||
|
"room_id":"room_beta@sy.org",
|
||
|
"msg_id":"z839411",
|
||
|
"from":"alice@randomhost.org",
|
||
|
"hs_ts":140197000,
|
||
|
"content":{
|
||
|
"msgtype":"m.text",
|
||
|
"body":"You're not my friend"
|
||
|
}
|
||
|
},
|
||
|
{
|
||
|
"event_id":"0018453d",
|
||
|
"type":"m.room.member",
|
||
|
"room_id":"commoners@randomhost.org",
|
||
|
"from":"alice@randomhost.org",
|
||
|
"user_id":"bob@sy.org",
|
||
|
"content":{
|
||
|
"membership":"invite"
|
||
|
}
|
||
|
},
|
||
|
],
|
||
|
"start": "stok_0184288",
|
||
|
"end": "etok_1348723"
|
||
|
}
|