You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
575 lines
17 KiB
ReStructuredText
575 lines
17 KiB
ReStructuredText
.. TODO
|
|
Sometimes application services need to create rooms (e.g. when lazy loading
|
|
from room aliases). Created rooms need to have a user that created them, so
|
|
federation works (as it relies on an entry existing in m.room.member). We
|
|
should be able to add metadata to m.room.member to state that this user is an
|
|
application service, a virtual user, etc.
|
|
|
|
|
|
Application Services HTTP API
|
|
=============================
|
|
|
|
.. contents:: Table of Contents
|
|
|
|
.. sectnum::
|
|
|
|
Application Service -> Home Server
|
|
----------------------------------
|
|
This contains home server APIs which are used by the application service.
|
|
|
|
Registration API ``[Draft]``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
This API registers the application service with its host homeserver to offer its
|
|
services.
|
|
|
|
Inputs:
|
|
- Credentials (e.g. some kind of string token)
|
|
- Namespace[users]
|
|
- Namespace[room aliases]
|
|
- URL base to receive inbound comms
|
|
Output:
|
|
- The credentials the HS will use to query the AS with in return. (e.g. some
|
|
kind of string token)
|
|
Side effects:
|
|
- The HS will start delivering events to the URL base specified if this 200s.
|
|
API called when:
|
|
- The application service wants to register with a brand new home server.
|
|
Notes:
|
|
- An application service can state whether they should be the only ones who
|
|
can manage a specified namespace. This is referred to as an "exclusive"
|
|
namespace. An exclusive namespace prevents humans and other application
|
|
services from creating/deleting entities in that namespace. Typically,
|
|
exclusive namespaces are used when the rooms represent real rooms on
|
|
another service (e.g. IRC). Non-exclusive namespaces are used when the
|
|
application service is merely augmenting the room itself (e.g. providing
|
|
logging or searching facilities).
|
|
- Namespaces are represented by POSIX extended regular expressions in JSON.
|
|
They look like::
|
|
|
|
users: [
|
|
{
|
|
"exclusive": true,
|
|
"regex": "@irc\.freenode\.net/.*"
|
|
}
|
|
]
|
|
|
|
::
|
|
|
|
POST /register
|
|
|
|
Request format
|
|
{
|
|
url: "https://my.application.service.com/matrix/",
|
|
as_token: "some_AS_token",
|
|
namespaces: {
|
|
users: [
|
|
{
|
|
"exclusive": true,
|
|
"regex": "@irc\.freenode\.net/.*"
|
|
}
|
|
],
|
|
aliases: [
|
|
{
|
|
"exclusive": true,
|
|
"regex": "#irc\.freenode\.net/.*"
|
|
}
|
|
],
|
|
rooms: [
|
|
{
|
|
"exclusive": true,
|
|
"regex": "!irc\.freenode\.net/.*"
|
|
}
|
|
]
|
|
}
|
|
}
|
|
|
|
|
|
Returns:
|
|
200 : Registration accepted.
|
|
400 : Namespaces do not conform to regex
|
|
401 : Credentials need to be supplied.
|
|
403 : AS credentials rejected.
|
|
|
|
|
|
200 OK response format
|
|
|
|
{
|
|
hs_token: "string"
|
|
}
|
|
|
|
Unregister API ``[Draft]``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
This API unregisters a previously registered AS from the home server.
|
|
|
|
Inputs:
|
|
- AS token
|
|
Output:
|
|
- None.
|
|
Side effects:
|
|
- The HS will stop delivering events to the URL base specified for this AS if
|
|
this 200s.
|
|
API called when:
|
|
- The application service wants to stop receiving all events from the HS.
|
|
|
|
::
|
|
|
|
POST /unregister
|
|
|
|
Request format
|
|
{
|
|
as_token: "string"
|
|
}
|
|
|
|
|
|
Home Server -> Application Service
|
|
----------------------------------
|
|
This contains application service APIs which are used by the home server.
|
|
|
|
User Query ``[Draft]``
|
|
~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
This API is called by the HS to query the existence of a user on the Application
|
|
Service's namespace.
|
|
|
|
Inputs:
|
|
- User ID
|
|
- HS Credentials
|
|
Output:
|
|
- Whether the user exists.
|
|
Side effects:
|
|
- User is created on the HS by the AS via CS APIs during the processing of this request.
|
|
API called when:
|
|
- HS receives an event for an unknown user ID in the AS's namespace, e.g. an
|
|
invite event to a room.
|
|
Notes:
|
|
- When the AS receives this request, if the user exists, it must create the user via
|
|
the CS API.
|
|
- It can also set arbitrary information about the user (e.g. display name, join rooms, etc)
|
|
using the CS API.
|
|
- When this setup is complete, the AS should respond to the HS request. This means the AS
|
|
blocks the HS until the user is created.
|
|
- This is deemed more flexible than alternative methods (e.g. returning a JSON blob with the
|
|
user's display name and get the HS to provision the user).
|
|
Retry notes:
|
|
- The home server cannot respond to the client's request until the response to
|
|
this API is obtained from the AS.
|
|
- Recommended that home servers try a few times then time out, returning a
|
|
408 Request Timeout to the client.
|
|
|
|
::
|
|
|
|
GET /users/$user_id?access_token=$hs_token
|
|
|
|
Returns:
|
|
200 : User is recognised.
|
|
404 : User not found.
|
|
401 : Credentials need to be supplied.
|
|
403 : HS credentials rejected.
|
|
|
|
|
|
200 OK response format
|
|
|
|
{}
|
|
|
|
Room Alias Query ``[Draft]``
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
This API is called by the HS to query the existence of a room alias on the
|
|
Application Service's namespace.
|
|
|
|
Inputs:
|
|
- Room alias
|
|
- HS Credentials
|
|
Output:
|
|
- Whether the room exists.
|
|
Side effects:
|
|
- Room is created on the HS by the AS via CS APIs during the processing of
|
|
this request.
|
|
API called when:
|
|
- HS receives an event to join a room alias in the AS's namespace.
|
|
Notes:
|
|
- When the AS receives this request, if the room exists, it must create the room via
|
|
the CS API.
|
|
- It can also set arbitrary information about the room (e.g. name, topic, etc)
|
|
using the CS API.
|
|
- It can send messages as other users in order to populate scrollback.
|
|
- When this setup is complete, the AS should respond to the HS request. This means the AS
|
|
blocks the HS until the room is created and configured.
|
|
- This is deemed more flexible than alternative methods (e.g. returning an initial sync
|
|
style JSON blob and get the HS to provision the room). It also means that the AS knows
|
|
the room ID -> alias mapping.
|
|
Retry notes:
|
|
- The home server cannot respond to the client's request until the response to
|
|
this API is obtained from the AS.
|
|
- Recommended that home servers try a few times then time out, returning a
|
|
408 Request Timeout to the client.
|
|
|
|
::
|
|
|
|
GET /rooms/$room_alias?access_token=$hs_token
|
|
|
|
Returns:
|
|
200 : Room is recognised.
|
|
404 : Room not found.
|
|
401 : Credentials need to be supplied.
|
|
403 : HS credentials rejected.
|
|
|
|
|
|
200 OK response format
|
|
|
|
{}
|
|
|
|
Pushing ``[Draft]``
|
|
~~~~~~~~~~~~~~~~~~~
|
|
This API is called by the HS when the HS wants to push an event (or batch of
|
|
events) to the AS.
|
|
|
|
Inputs:
|
|
- HS Credentials
|
|
- Event(s) to give to the AS
|
|
- HS-generated transaction ID
|
|
Output:
|
|
- None.
|
|
|
|
Data flows:
|
|
|
|
::
|
|
|
|
Typical
|
|
HS ---> AS : Home server sends events with transaction ID T.
|
|
<--- : AS sends back 200 OK.
|
|
|
|
AS ACK Lost
|
|
HS ---> AS : Home server sends events with transaction ID T.
|
|
<-/- : AS 200 OK is lost.
|
|
HS ---> AS : Home server retries with the same transaction ID of T.
|
|
<--- : AS sends back 200 OK. If the AS had processed these events
|
|
already, it can NO-OP this request (and it knows if it is the same
|
|
events based on the transacton ID).
|
|
|
|
|
|
Retry notes:
|
|
- If the HS fails to pass on the events to the AS, it must retry the request.
|
|
- Since ASes by definition cannot alter the traffic being passed to it (unlike
|
|
say, a Policy Server), these requests can be done in parallel to general HS
|
|
processing; the HS doesn't need to block whilst doing this.
|
|
- Home servers should use exponential backoff as their retry algorithm.
|
|
- Home servers MUST NOT alter (e.g. add more) events they were going to
|
|
send within that transaction ID on retries, as the AS may have already
|
|
processed the events.
|
|
|
|
Ordering notes:
|
|
- The events sent to the AS should be linearised, as they are from the event
|
|
stream.
|
|
- The home server will need to maintain a queue of transactions to send to
|
|
the AS.
|
|
|
|
::
|
|
|
|
PUT /transactions/$transaction_id?access_token=$hs_token
|
|
|
|
Request format
|
|
{
|
|
events: [
|
|
...
|
|
]
|
|
}
|
|
|
|
Client-Server v2 API Extensions
|
|
-------------------------------
|
|
|
|
Identity assertion
|
|
~~~~~~~~~~~~~~~~~~
|
|
The client-server API infers the user ID from the ``access_token`` provided in
|
|
every request. It would be an annoying amount of book-keeping to maintain tokens
|
|
for every virtual user. It would be preferable if the application service could
|
|
use the CS API with its own ``as_token`` instead, and specify the virtual user
|
|
they wish to be acting on behalf of. For real users, this would require
|
|
additional permissions granting the AS permission to masquerade as a matrix user.
|
|
|
|
Inputs:
|
|
- Application service token (``access_token``)
|
|
|
|
Either:
|
|
- User ID in the AS namespace to act as.
|
|
Or:
|
|
- OAuth2 token of real user (which may end up being an access token)
|
|
Notes:
|
|
- This will apply on all aspects of the CS API, except for Account Management.
|
|
- The ``as_token`` is inserted into ``access_token`` which is usually where the
|
|
client token is. This is done on purpose to allow application services to
|
|
reuse client SDKs.
|
|
|
|
::
|
|
|
|
/path?access_token=$token&user_id=$userid
|
|
|
|
Query Parameters:
|
|
access_token: The application service token
|
|
user_id: The desired user ID to act as.
|
|
|
|
/path?access_token=$token&user_token=$token
|
|
|
|
Query Parameters:
|
|
access_token: The application service token
|
|
user_token: The token granted to the AS by the real user
|
|
|
|
Timestamp massaging
|
|
~~~~~~~~~~~~~~~~~~~
|
|
The application service may want to inject events at a certain time (reflecting
|
|
the time on the network they are tracking e.g. irc, xmpp). Application services
|
|
need to be able to adjust the ``origin_server_ts`` value to do this.
|
|
|
|
Inputs:
|
|
- Application service token (``as_token``)
|
|
- Desired timestamp
|
|
Notes:
|
|
- This will only apply when sending events.
|
|
|
|
::
|
|
|
|
/path?access_token=$token&ts=$timestamp
|
|
|
|
Query Parameters added to the send event APIs only:
|
|
access_token: The application service token
|
|
ts: The desired timestamp
|
|
|
|
Server admin style permissions
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
The home server needs to give the application service *full control* over its
|
|
namespace, both for users and for room aliases. This means that the AS should
|
|
be able to create/edit/delete any room alias in its namespace, as well as
|
|
create/delete any user in its namespace. No additional API changes need to be
|
|
made in order for control of room aliases to be granted to the AS. Creation of
|
|
users needs API changes in order to:
|
|
|
|
- Work around captchas.
|
|
- Have a 'passwordless' user.
|
|
|
|
This involves bypassing the registration flows entirely. This is achieved by
|
|
including the AS token on a ``/register`` request, along with a login type of
|
|
``m.login.application_service`` to set the desired user ID without a password.
|
|
|
|
::
|
|
|
|
/register?access_token=$as_token
|
|
|
|
Content:
|
|
{
|
|
type: "m.login.application_service",
|
|
user: "<desired user localpart in AS namespace>"
|
|
}
|
|
|
|
Application services which attempt to create users or aliases *outside* of
|
|
their defined namespaces will receive an error code ``M_EXCLUSIVE``. Similarly,
|
|
normal users who attempt to create users or alises *inside* an application
|
|
service-defined namespace will receive the same ``M_EXCLUSIVE`` error code.
|
|
|
|
ID conventions ``[Draft]``
|
|
--------------------------
|
|
.. NOTE::
|
|
- Giving HSes the freedom to namespace still feels like the Right Thing here.
|
|
- Exposing a public API provides the consistency which was the main complaint
|
|
against namespacing.
|
|
- This may have knock-on effects for the AS registration API. E.g. why don't
|
|
we let ASes specify the *URI* regex they want?
|
|
|
|
This concerns the well-defined conventions for mapping 3P network IDs to matrix
|
|
IDs, which we expect clients to be able to do by themselves.
|
|
|
|
User IDs
|
|
~~~~~~~~
|
|
Matrix users may wish to directly contact a virtual user, e.g. to send an email.
|
|
The URI format is a well-structured way to represent a number of different ID
|
|
types, including:
|
|
|
|
- MSISDNs (``tel``)
|
|
- Email addresses (``mailto``)
|
|
- IRC nicks (``irc`` - https://tools.ietf.org/html/draft-butcher-irc-url-04)
|
|
- XMPP (xep-0032)
|
|
- SIP URIs (RFC 3261)
|
|
|
|
As a result, virtual user IDs SHOULD relate to their URI counterpart. This
|
|
mapping from URI to user ID can be expressed in a number of ways:
|
|
|
|
- Expose a C-S API on the HS which takes URIs and responds with user IDs.
|
|
- Munge the URI with the user ID.
|
|
|
|
Exposing an API would allow HSes to internally map user IDs however they like,
|
|
at the cost of an extra round trip (of which the response can be cached).
|
|
Munging the URI would allow clients to apply the mapping locally, but would force
|
|
user X on service Y to always map to the same munged user ID. Considering the
|
|
exposed API could just be applying this munging, there is more flexibility if
|
|
an API is exposed.
|
|
|
|
::
|
|
|
|
GET /_matrix/app/v1/user?uri=$url_encoded_uri
|
|
|
|
Returns 200 OK:
|
|
{
|
|
user_id: <complete user ID on local HS>
|
|
}
|
|
|
|
Room Aliases
|
|
~~~~~~~~~~~~
|
|
We may want to expose some 3P network rooms so Matrix users can join them directly,
|
|
e.g. IRC rooms. We don't want to expose every 3P network room though, e.g. mailto,
|
|
tel. Rooms which are publicly accessible (e.g. IRC rooms) can be exposed as an alias by
|
|
the application service. Private rooms (e.g. sending an email to someone) should not
|
|
be exposed in this way, but should instead operate using normal invite/join semantics.
|
|
Therefore, the ID conventions discussed below are only valid for public rooms which
|
|
expose room aliases.
|
|
|
|
Matrix users may wish to join XMPP rooms (e.g. using XEP-0045) or IRC rooms. In both
|
|
cases, these rooms can be expressed as URIs. For consistency, these "room" URIs
|
|
SHOULD be mapped in the same way as "user" URIs.
|
|
|
|
::
|
|
|
|
GET /_matrix/app/v1/alias?uri=$url_encoded_uri
|
|
|
|
Returns 200 OK:
|
|
{
|
|
alias: <complete room alias on local HS>
|
|
}
|
|
|
|
Event fields
|
|
~~~~~~~~~~~~
|
|
We recommend that any gatewayed events should include an ``external_url`` field
|
|
in their content to provide a way for Matrix clients to link into the 'native'
|
|
client from which the event originated. For instance, this could contain the
|
|
message-ID for emails/nntp posts, or a link to a blog comment when gatewaying
|
|
blog comment traffic in & out of matrix
|
|
|
|
|
|
Examples
|
|
--------
|
|
.. NOTE::
|
|
- User/Alias namespaces are subject to change depending on ID conventions.
|
|
|
|
IRC
|
|
~~~
|
|
Pre-conditions:
|
|
- Server admin stores the AS token "T_a" on the home server.
|
|
- Home server has a token "T_h".
|
|
- Home server has the domain "hsdomain.com"
|
|
|
|
1. Application service registration
|
|
|
|
::
|
|
|
|
AS -> HS: Registers itself with the home server
|
|
POST /register
|
|
{
|
|
url: "https://someapp.com/matrix",
|
|
as_token: "T_a",
|
|
namespaces: {
|
|
users: [
|
|
{
|
|
"exclusive": true,
|
|
"regex": "@irc\.freenode\.net/.*"
|
|
}
|
|
],
|
|
aliases: [
|
|
{
|
|
"exclusive": true,
|
|
"regex": "#irc\.freenode\.net/.*"
|
|
}
|
|
]
|
|
}
|
|
}
|
|
|
|
Returns 200 OK:
|
|
{
|
|
hs_token: "T_h"
|
|
}
|
|
|
|
2. IRC user "Bob" says "hello?" on "#matrix" at timestamp 1421416883133:
|
|
|
|
::
|
|
|
|
- AS stores message as potential scrollback.
|
|
- Nothing happens as no Matrix users are in the room.
|
|
|
|
3. Matrix user "@alice:hsdomain.com" wants to join "#matrix":
|
|
|
|
::
|
|
|
|
User -> HS: Request to join "#irc.freenode.net/#matrix:hsdomain.com"
|
|
|
|
HS -> AS: Room Query "#irc.freenode.net/#matrix:hsdomain.com"
|
|
GET /rooms/%23irc.freenode.net%2F%23matrix%3Ahsdomain.com?access_token=T_h
|
|
[Starts blocking]
|
|
AS -> HS: Creates room. Gets room ID "!aasaasasa:hsdomain.com".
|
|
AS -> HS: Sets room name to "#matrix".
|
|
AS -> HS: Sends message as ""@irc.freenode.net/Bob:hsdomain.com"
|
|
PUT /rooms/%21aasaasasa%3Ahsdomain.com/send/m.room.message
|
|
?access_token=T_a
|
|
&user_id=%40irc.freenode.net%2FBob%3Ahsdomain.com
|
|
&ts=1421416883133
|
|
{
|
|
body: "hello?"
|
|
msgtype: "m.text"
|
|
}
|
|
HS -> AS: User Query "@irc.freenode.net/Bob:hsdomain.com"
|
|
GET /users/%40irc.freenode.net%2FBob%3Ahsdomain.com?access_token=T_h
|
|
[Starts blocking]
|
|
AS -> HS: Creates user using CS API extension.
|
|
POST /register?access_token=T_a
|
|
{
|
|
type: "m.login.application_service",
|
|
user: "irc.freenode.net/Bob"
|
|
}
|
|
AS -> HS: Set user display name to "Bob".
|
|
[Finishes blocking]
|
|
[Finished blocking]
|
|
|
|
- HS sends room information back to client.
|
|
|
|
4. @alice:hsdomain.com says "hi!" in this room:
|
|
|
|
::
|
|
|
|
User -> HS: Send message "hi!" in room !aasaasasa:hsdomain.com
|
|
|
|
- HS sends message.
|
|
- HS sees the room ID is in the AS namespace and pushes it to the AS.
|
|
|
|
HS -> AS: Push event
|
|
PUT /transactions/1?access_token=T_h
|
|
{
|
|
events: [
|
|
{
|
|
content: {
|
|
body: "hi!",
|
|
msgtype: "m.text"
|
|
},
|
|
origin_server_ts: <generated by hs>,
|
|
user_id: "@alice:hsdomain.com",
|
|
room_id: "!aasaasasa:hsdomain.com",
|
|
type: "m.room.message"
|
|
}
|
|
]
|
|
}
|
|
|
|
- AS passes this through to IRC.
|
|
|
|
|
|
5. IRC user "Bob" says "what's up?" on "#matrix" at timestamp 1421418084816:
|
|
|
|
::
|
|
|
|
IRC -> AS: "what's up?"
|
|
AS -> HS: Send message via CS API extension
|
|
PUT /rooms/%21aasaasasa%3Ahsdomain.com/send/m.room.message
|
|
?access_token=T_a
|
|
&user_id=%40irc.freenode.net%2FBob%3Ahsdomain.com
|
|
&ts=1421418084816
|
|
{
|
|
body: "what's up?"
|
|
msgtype: "m.text"
|
|
}
|
|
|
|
- HS modifies the user_id and origin_server_ts on the event and sends it.
|