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diff --git a/docs/client-server/specification b/docs/client-server/specification new file mode 100644 index 0000000000..7df2bb14c5 --- /dev/null +++ b/docs/client-server/specification @@ -0,0 +1,1264 @@ +========================= +Synapse Client-Server API +========================= + +The following specification outlines how a client can send and receive data from +a home server. + +[[TODO(kegan): 4/7/14 Grilling +- Mechanism for getting historical state changes (e.g. topic updates) - add + query param flag? +- Generic mechanism for linking first class events (e.g. feedback) with other s + first class events (e.g. messages)? +- Generic mechanism for updating 'stuff about the room' (e.g. favourite coffee) + AND specifying clobbering rules (clobber/add to list/etc)? +- How to ensure a consistent view for clients paginating through room lists? + They aren't really ordered in any way, and if you're paginating + through them, how can you show them a consistent result set? Temporary 'room + list versions' akin to event version? How does that work? +]] + +[[TODO(kegan): +Outstanding problems / missing spec: +- Push +- Typing notifications +]] + +Terminology +----------- +Stream Tokens: +An opaque token used to make further streaming requests. When using any +pagination streaming API, responses will contain a start and end stream token. +When reconnecting to the stream, these tokens can be used to tell the server +where the client got up to in the stream. + +Event ID: +Every event that comes down the event stream or that is returned from the REST +API has an associated event ID (event_id). This ID will be the same between the +REST API and the event stream, so any duplicate events can be clobbered +correctly without knowing anything else about the event. + +Message ID: +The ID of a message sent by a client in a room. Clients send IMs to each other +in rooms. Each IM sent by a client must have a unique message ID which is unique +for that particular client. + +User ID: +The @username:host style ID of the client. When registering for an account, the +client specifies their username. The user_id is this username along with the +home server's unique hostname. When federating between home servers, the user_id +is used to uniquely identify users across multiple home servers. + +Room ID: +The room_id@host style ID for the room. When rooms are created, the client either +specifies or is allocated a room ID. This room ID must be used to send messages +in that room. Like with clients, there may be multiple rooms with the same ID +across multiple home servers. The room_id is used to uniquely identify a room +when federating. + +Global message ID: +The globally unique ID for a message. This ID is formed from the msg_id, the +client's user_id and the room_id. This uniquely identifies any +message. It is represented with '-' as the delimeter between IDs. The +global_msg_id is of the form: room_id-user_id-msg_id + + +REST API and the Event Stream +----------------------------- +Clients send data to the server via a RESTful API. They can receive data via +this API or from an event stream. An event stream is a special path which +streams all events the client may be interested in. This makes it easy to +immediately receive updates from the REST API. All data is represented as JSON. + +Pagination streaming API +======================== +Clients are often interested in very large datasets. The data itself could +be 1000s of messages in a given room, 1000s of rooms in a public room list, or +1000s of events (presence, typing, messages, etc) in the system. It is not +practical to send vast quantities of data to the client every time they +request a list of public rooms for example. There needs to be a way to show a +subset of this data, and apply various filters to it. This is what the pagination +streaming API is. This API defines standard request/response parameters which +can be used when navigating this stream of data. + +Pagination Request Query Parameters +----------------------------------- +Clients may wish to paginate results from the event stream, or other sources of +information where the amount of information may be a problem, +e.g. in a room with 10,000s messages. The pagination query parameters provide a +way to navigate a 'window' around a large set of data. These +parameters are only valid for GET requests. + + S e r v e r - s i d e d a t a + |-------------------------------------------------| +START ^ ^ END + |_______________| + | + Client-extraction + +'START' and 'END' are magic token values which specify the start and end of the +dataset respectively. + +Query parameters: + from : $streamtoken - The opaque token to start streaming from. + to : $streamtoken - The opaque token to end streaming at. Typically, + clients will not know the item of data to end at, so this will usually be + START or END. + limit : integer - An integer representing the maximum number of items to + return. + +For example, the event stream has events E1 -> E15. The client wants the last 5 +events and doesn't know any previous events: + +S E +|-E1-E2-E3-E4-E5-E6-E7-E8-E9-E10-E11-E12-E13-E14-E15-| +| | | +| _____| | +|__________________ | ___________________| + | | | + GET /events?to=START&limit=5&from=END + Returns: + E15,E14,E13,E12,E11 + + +Another example: a public room list has rooms R1 -> R17. The client is showing 5 +rooms at a time on screen, and is on page 2. They want to +now show page 3 (rooms R11 -> 15): + +S E +| 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | stream token +|-R1-R2-R3-R4-R5-R6-R7-R8-R9-R10-R11-R12-R13-R14-R15-R16-R17| room + |____________| |________________| + | | + Currently | + viewing | + | + GET /rooms/list?from=9&to=END&limit=5 + Returns: R11,R12,R13,R14,R15 + +Note that tokens are treated in an *exclusive*, not inclusive, manner. The end +token from the intial request was '9' which corresponded to R10. When the 2nd +request was made, R10 did not appear again, even though from=9 was specified. If +you know the token, you already have the data. + +Pagination Response +------------------- +Responses to pagination requests MUST follow the format: +{ + "chunk": [ ... , Responses , ... ], + "start" : $streamtoken, + "end" : $streamtoken +} +Where $streamtoken is an opaque token which can be used in another query to +get the next set of results. The "start" and "end" keys can only be omitted if +the complete dataset is provided in "chunk". + +If the client wants earlier results, they should use from=$start_streamtoken, +to=START. Likewise, if the client wants later results, they should use +from=$end_streamtoken, to=END. + +Unless specified, the default pagination parameters are from=START, to=END, +without a limit set. This allows you to hit an API like +/events without any query parameters to get everything. + +The Event Stream +---------------- +The event stream returns events using the pagination streaming API. When the +client disconnects for a while and wants to reconnect to the event stream, they +should specify from=$end_streamtoken. This lets the server know where in the +event stream the client is. These tokens are completely opaque, and the client +cannot infer anything from them. + + GET /events?from=$LAST_STREAM_TOKEN + REST Path: /events + Returns (success): A JSON array of Event Data. + Returns (failure): An Error Response + +LAST_STREAM_TOKEN is the last stream token obtained from the event stream. If the +client is connecting for the first time and does not know any stream tokens, +they can use "START" to request all events from the start. For more information +on this, see "Pagination Request Query Parameters". + +The event stream supports shortpoll and longpoll with the "timeout" query +parameter. This parameter specifies the number of milliseconds the server should +hold onto the connection waiting for incoming events. If no events occur in this +period, the connection will be closed and an empty chunk will be returned. To +use shortpoll, specify "timeout=0". + +Event Data +---------- +This is a JSON object which looks like: +{ + "event_id" : $EVENT_ID, + "type" : $EVENT_TYPE, + $URL_ARGS, + "content" : { + $EVENT_CONTENT + } +} + +EVENT_ID + An ID identifying this event. This is so duplicate events can be suppressed on + the client. + +EVENT_TYPE + The namespaced event type (m.*) + +URL_ARGS + Path specific data from the REST API. + +EVENT_CONTENT + The event content, matching the REST content PUT previously. + +Events are differentiated via the event type "type" key. This is the type of +event being received. This can be expanded upon by using different namespaces. +Every event MUST have a 'type' key. + +Most events will have a corresponding REST URL. This URL will generally have +data in it to represent the resource being modified, +e.g. /rooms/$room_id. The event data will contain extra top-level keys to expose +this information to clients listening on an event +stream. The event content maps directly to the contents submitted via the REST +API. + +For example: + Event Type: m.example.room.members + REST Path: /examples/room/$room_id/members/$user_id + REST Content: { "membership" : "invited" } + +is represented in the event stream as: + +{ + "event_id" : "e_some_event_id", + "type" : "m.example.room.members", + "room_id" : $room_id, + "user_id" : $user_id, + "content" : { + "membership" : "invited" + } +} + +As convention, the URL variable "$varname" will map directly onto the name +of the JSON key "varname". + +Error Responses +--------------- +If the client sends an invalid request, the server MAY respond with an error +response. This is of the form: +{ + "error" : "string", + "errcode" : "string" +} +The 'error' string will be a human-readable error message, usually a sentence +explaining what went wrong. + +The 'errcode' string will be a unique string which can be used to handle an +error message e.g. "M_FORBIDDEN". These error codes should have their namespace +first in ALL CAPS, followed by a single _. For example, if there was a custom +namespace com.mydomain.here, and a "FORBIDDEN" code, the error code should look +like "COM.MYDOMAIN.HERE_FORBIDDEN". There may be additional keys depending on +the error, but the keys 'error' and 'errcode' will always be present. + +Some standard error codes are below: + +M_FORBIDDEN: +Forbidden access, e.g. bad access token, failed login. + +M_BAD_JSON: +Request contained valid JSON, but it was malformed in some way, e.g. missing +required keys, invalid values for keys. + +M_NOT_JSON: +Request did not contain valid JSON. + +M_NOT_FOUND: +No resource was found for this request. + +Some requests have unique error codes: + +M_USER_IN_USE: +Encountered when trying to register a user ID which has been taken. + +M_ROOM_IN_USE: +Encountered when trying to create a room which has been taken. + +M_BAD_PAGINATION: +Encountered when specifying bad pagination values to a Pagination Streaming API. + + +======== +REST API +======== + +All content must be application/json. Some keys are required, while others are +optional. Unless otherwise specified, +all HTTP PUT/POST/DELETEs will return a 200 OK with an empty response body on +success, and a 4xx/5xx with an optional Error Response on failure. When sending +data, if there are no keys to send, an empty JSON object should be sent. + +All POST/PUT/GET/DELETE requests MUST have an 'access_token' query parameter to +allow the server to authenticate the client. All +POST requests MUST be submitted as application/json. + +All paths MUST be namespaced by the version of the API being used. This should +be: + +/matrix/client/api/v1 + +All REST paths in this section MUST be prefixed with this. E.g. + REST Path: /rooms/$room_id + Absolute Path: /matrix/client/api/v1/rooms/$room_id + +Registration +============ +Clients must register with the server in order to use the service. After +registering, the client will be given an +access token which must be used in ALL requests as a query parameter +'access_token'. + +Registering for an account +-------------------------- + POST /register + With: A JSON object containing the key "user_id" which contains the desired + user_id, or an empty JSON object to have the server allocate a user_id + automatically. + Returns (success): 200 OK with a JSON object: + { + "user_id" : "string [user_id]", + "access_token" : "string" + } + Returns (failure): An Error Response. M_USER_IN_USE if the user ID is taken. + + +Unregistering an account +------------------------ + POST /unregister + With query parameters: access_token=$ACCESS_TOKEN + Returns (success): 200 OK + Returns (failure): An Error Response. + + +Logging in to an existing account +================================= +If the client has already registered, they need to be able to login to their +account. The home server may provide many different ways of logging in, such +as user/password auth, login via a social network (OAuth), login by confirming +a token sent to their email address, etc. This section does NOT define how home +servers should authorise their users who want to login to their existing +accounts. This section defines the standard interface which implementations +should follow so that ANY client can login to ANY home server. + +The login process breaks down into the following: + 1: Get login process info. + 2: Submit the login stage credentials. + 3: Get access token or be told the next stage in the login process and repeat + step 2. + +Getting login process info: + GET /login + Returns (success): 200 OK with LoginInfo. + Returns (failure): An Error Response. + +Submitting the login stage credentials: + POST /login + With: LoginSubmission + Returns (success): 200 OK with LoginResult + Returns (failure): An Error Response + +Where LoginInfo is a JSON object which MUST have a "type" key which denotes the +login type. If there are multiple login stages, this object MUST also contain a +"stages" key, which has a JSON array of login types denoting all the steps in +order to login, including the first stage which is in "type". This allows the +client to make an informed decision as to whether or not they can natively +handle the entire login process, or whether they should fallback (see below). + +Where LoginSubmission is a JSON object which MUST have a "type" key. + +Where LoginResult is a JSON object which MUST have either a "next" key OR an +"access_token" key, depending if the login process is over or not. This object +MUST have a "session" key if multiple POSTs need to be sent to /login. + +Fallback +-------- +If the client does NOT know how to handle the given type, they should: + GET /login/fallback +This MUST return an HTML page which can perform the entire login process. + +Password-based +-------------- +Type: "m.login.password" +LoginSubmission: +{ + "type": "m.login.password", + "user": <user_id>, + "password": <password> +} + +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.password" +} +Your client knows how to handle this, so your client prompts the user to enter +their username and password. This is then submitted: +{ + "type": "m.login.password", + "user": "@bob:matrix.org", + "password": "monkey" +} +The server checks this, finds it is valid, and returns: +{ + "access_token": "abcdef0123456789" +} + +OAuth2-based +------------ +Type: "m.login.oauth2" +This is a multi-stage login. + +LoginSubmission: +{ + "type": "m.login.oauth2", + "user": <user_id> +} +Returns: +{ + "uri": <Authorization Request uri OR service selection uri> +} + +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" +} |