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<ol class="chapter"><li class="chapter-item expanded affix "><li class="part-title">Introduction</li><li class="chapter-item expanded "><a href="../welcome_and_overview.html">Welcome and Overview</a></li><li class="chapter-item expanded affix "><li class="part-title">Setup</li><li class="chapter-item expanded "><a href="../setup/installation.html">Installation</a></li><li class="chapter-item expanded "><a href="../postgres.html">Using Postgres</a></li><li class="chapter-item expanded "><a href="../reverse_proxy.html">Configuring a Reverse Proxy</a></li><li class="chapter-item expanded "><a href="../setup/forward_proxy.html">Configuring a Forward/Outbound Proxy</a></li><li class="chapter-item expanded "><a href="../turn-howto.html">Configuring a Turn Server</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../setup/turn/coturn.html">coturn TURN server</a></li><li class="chapter-item expanded "><a href="../setup/turn/eturnal.html">eturnal TURN server</a></li></ol></li><li class="chapter-item expanded "><a href="../delegate.html">Delegation</a></li><li class="chapter-item expanded affix "><li class="part-title">Upgrading</li><li class="chapter-item expanded "><a href="../upgrade.html">Upgrading between Synapse Versions</a></li><li class="chapter-item expanded affix "><li class="part-title">Usage</li><li class="chapter-item expanded "><a href="../federate.html">Federation</a></li><li class="chapter-item expanded "><a href="../usage/configuration/index.html">Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../usage/configuration/config_documentation.html">Configuration Manual</a></li><li class="chapter-item expanded "><a href="../usage/configuration/homeserver_sample_config.html">Homeserver Sample Config File</a></li><li class="chapter-item expanded "><a href="../usage/configuration/logging_sample_config.html">Logging Sample Config File</a></li><li class="chapter-item expanded "><a href="../structured_logging.html">Structured Logging</a></li><li class="chapter-item expanded "><a href="../templates.html">Templates</a></li><li class="chapter-item expanded "><a href="../usage/configuration/user_authentication/index.html">User Authentication</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../usage/configuration/user_authentication/single_sign_on/index.html">Single-Sign On</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../openid.html">OpenID Connect</a></li><li class="chapter-item expanded "><a href="../usage/configuration/user_authentication/single_sign_on/saml.html">SAML</a></li><li class="chapter-item expanded "><a href="../usage/configuration/user_authentication/single_sign_on/cas.html">CAS</a></li><li class="chapter-item expanded "><a href="../sso_mapping_providers.html">SSO Mapping Providers</a></li></ol></li><li class="chapter-item expanded "><a href="../password_auth_providers.html">Password Auth Providers</a></li><li class="chapter-item expanded "><a href="../jwt.html">JSON Web Tokens</a></li><li class="chapter-item expanded "><a href="../usage/configuration/user_authentication/refresh_tokens.html">Refresh Tokens</a></li></ol></li><li class="chapter-item expanded "><a href="../CAPTCHA_SETUP.html">Registration Captcha</a></li><li class="chapter-item expanded "><a href="../application_services.html">Application Services</a></li><li class="chapter-item expanded "><a href="../server_notices.html">Server Notices</a></li><li class="chapter-item expanded "><a href="../consent_tracking.html">Consent Tracking</a></li><li class="chapter-item expanded "><a href="../user_directory.html">User Directory</a></li><li class="chapter-item expanded "><a href="../message_retention_policies.html">Message Retention Policies</a></li><li class="chapter-item expanded "><a href="../modules/index.html">Pluggable Modules</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../modules/writing_a_module.html">Writing a module</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../modules/spam_checker_callbacks.html">Spam checker callbacks</a></li><li class="chapter-item expanded "><a href="../modules/third_party_rules_callbacks.html">Third-party rules callbacks</a></li><li class="chapter-item expanded "><a href="../modules/presence_router_callbacks.html">Presence router callbacks</a></li><li class="chapter-item expanded "><a href="../modules/account_validity_callbacks.html">Account validity callbacks</a></li><li class="chapter-item expanded "><a href="../modules/password_auth_provider_callbacks.html">Password auth provider callbacks</a></li><li class="chapter-item expanded "><a href="../modules/background_update_controller_callbacks.html">Background update controller callbacks</a></li><li class="chapter-item expanded "><a href="../modules/account_data_callbacks.html" class="active">Account data callbacks</a></li><li class="chapter-item expanded "><a hrefLine truncated
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<h1 id="account-data-callbacks"><a class="header" href="#account-data-callbacks">Account data callbacks</a></h1>
|
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<p>Account data callbacks allow module developers to react to changes of the account data
|
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of local users. Account data callbacks can be registered using the module API's
|
||||
<code>register_account_data_callbacks</code> method.</p>
|
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<h2 id="callbacks"><a class="header" href="#callbacks">Callbacks</a></h2>
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<p>The available account data callbacks are:</p>
|
||||
<h3 id="on_account_data_updated"><a class="header" href="#on_account_data_updated"><code>on_account_data_updated</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.57.0</em></p>
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||||
<pre><code class="language-python">async def on_account_data_updated(
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user_id: str,
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||||
room_id: Optional[str],
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||||
account_data_type: str,
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||||
content: "synapse.module_api.JsonDict",
|
||||
) -> None:
|
||||
</code></pre>
|
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<p>Called after user's account data has been updated. The module is given the
|
||||
Matrix ID of the user whose account data is changing, the room ID the data is associated
|
||||
with, the type associated with the change, as well as the new content. If the account
|
||||
data is not associated with a specific room, then the room ID is <code>None</code>.</p>
|
||||
<p>This callback is triggered when new account data is added or when the data associated with
|
||||
a given type (and optionally room) changes. This includes deletion, since in Matrix,
|
||||
deleting account data consists of replacing the data associated with a given type
|
||||
(and optionally room) with an empty dictionary (<code>{}</code>).</p>
|
||||
<p>Note that this doesn't trigger when changing the tags associated with a room, as these are
|
||||
processed separately by Synapse.</p>
|
||||
<p>If multiple modules implement this callback, Synapse runs them all in order.</p>
|
||||
<h2 id="example"><a class="header" href="#example">Example</a></h2>
|
||||
<p>The example below is a module that implements the <code>on_account_data_updated</code> callback, and
|
||||
sends an event to an audit room when a user changes their account data.</p>
|
||||
<pre><code class="language-python">import json
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import attr
|
||||
from typing import Any, Dict, Optional
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from synapse.module_api import JsonDict, ModuleApi
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from synapse.module_api.errors import ConfigError
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|
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|
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@attr.s(auto_attribs=True)
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class CustomAccountDataConfig:
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audit_room: str
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sender: str
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|
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class CustomAccountDataModule:
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def __init__(self, config: CustomAccountDataConfig, api: ModuleApi):
|
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self.api = api
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||||
self.config = config
|
||||
|
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self.api.register_account_data_callbacks(
|
||||
on_account_data_updated=self.log_new_account_data,
|
||||
)
|
||||
|
||||
@staticmethod
|
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def parse_config(config: Dict[str, Any]) -> CustomAccountDataConfig:
|
||||
def check_in_config(param: str):
|
||||
if param not in config:
|
||||
raise ConfigError(f"'{param}' is required")
|
||||
|
||||
check_in_config("audit_room")
|
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check_in_config("sender")
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|
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return CustomAccountDataConfig(
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audit_room=config["audit_room"],
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sender=config["sender"],
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)
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async def log_new_account_data(
|
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self,
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user_id: str,
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room_id: Optional[str],
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account_data_type: str,
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content: JsonDict,
|
||||
) -> None:
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content_raw = json.dumps(content)
|
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msg_content = f"{user_id} has changed their account data for type {account_data_type} to: {content_raw}"
|
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|
||||
if room_id is not None:
|
||||
msg_content += f" (in room {room_id})"
|
||||
|
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await self.api.create_and_send_event_into_room(
|
||||
{
|
||||
"room_id": self.config.audit_room,
|
||||
"sender": self.config.sender,
|
||||
"type": "m.room.message",
|
||||
"content": {
|
||||
"msgtype": "m.text",
|
||||
"body": msg_content
|
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}
|
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}
|
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)
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</code></pre>
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<h1 id="account-validity-callbacks"><a class="header" href="#account-validity-callbacks">Account validity callbacks</a></h1>
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<p>Account validity callbacks allow module developers to add extra steps to verify the
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validity on an account, i.e. see if a user can be granted access to their account on the
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Synapse instance. Account validity callbacks can be registered using the module API's
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<p>The available account validity callbacks are:</p>
|
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<h3 id="is_user_expired"><a class="header" href="#is_user_expired"><code>is_user_expired</code></a></h3>
|
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<p><em>First introduced in Synapse v1.39.0</em></p>
|
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<pre><code class="language-python">async def is_user_expired(user: str) -> Optional[bool]
|
||||
</code></pre>
|
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<p>Called when processing any authenticated request (except for logout requests). The module
|
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can return a <code>bool</code> to indicate whether the user has expired and should be locked out of
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their account, or <code>None</code> if the module wasn't able to figure it out. The user is
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represented by their Matrix user ID (e.g. <code>@alice:example.com</code>).</p>
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<p>If the module returns <code>True</code>, the current request will be denied with the error code
|
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<code>ORG_MATRIX_EXPIRED_ACCOUNT</code> and the HTTP status code 403. Note that this doesn't
|
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invalidate the user's access token.</p>
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<p>If multiple modules implement this callback, they will be considered in order. If a
|
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callback returns <code>None</code>, Synapse falls through to the next one. The value of the first
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callback that does not return <code>None</code> will be used. If this happens, Synapse will not call
|
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any of the subsequent implementations of this callback.</p>
|
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<h3 id="on_user_registration"><a class="header" href="#on_user_registration"><code>on_user_registration</code></a></h3>
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<p><em>First introduced in Synapse v1.39.0</em></p>
|
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<pre><code class="language-python">async def on_user_registration(user: str) -> None
|
||||
</code></pre>
|
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<p>Called after successfully registering a user, in case the module needs to perform extra
|
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operations to keep track of them. (e.g. add them to a database table). The user is
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represented by their Matrix user ID.</p>
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<p>If multiple modules implement this callback, Synapse runs them all in order.</p>
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<h1 id="background-update-controller-callbacks"><a class="header" href="#background-update-controller-callbacks">Background update controller callbacks</a></h1>
|
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<p>Background update controller callbacks allow module developers to control (e.g. rate-limit)
|
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how database background updates are run. A database background update is an operation
|
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Synapse runs on its database in the background after it starts. It's usually used to run
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database operations that would take too long if they were run at the same time as schema
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updates (which are run on startup) and delay Synapse's startup too much: populating a
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table with a big amount of data, adding an index on a big table, deleting superfluous data,
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etc.</p>
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<p>Background update controller callbacks can be registered using the module API's
|
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<code>register_background_update_controller_callbacks</code> method. Only the first module (in order
|
||||
of appearance in Synapse's configuration file) calling this method can register background
|
||||
update controller callbacks, subsequent calls are ignored.</p>
|
||||
<p>The available background update controller callbacks are:</p>
|
||||
<h3 id="on_update"><a class="header" href="#on_update"><code>on_update</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.49.0</em></p>
|
||||
<pre><code class="language-python">def on_update(update_name: str, database_name: str, one_shot: bool) -> AsyncContextManager[int]
|
||||
</code></pre>
|
||||
<p>Called when about to do an iteration of a background update. The module is given the name
|
||||
of the update, the name of the database, and a flag to indicate whether the background
|
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update will happen in one go and may take a long time (e.g. creating indices). If this last
|
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argument is set to <code>False</code>, the update will be run in batches.</p>
|
||||
<p>The module must return an async context manager. It will be entered before Synapse runs a
|
||||
background update; this should return the desired duration of the iteration, in
|
||||
milliseconds.</p>
|
||||
<p>The context manager will be exited when the iteration completes. Note that the duration
|
||||
returned by the context manager is a target, and an iteration may take substantially longer
|
||||
or shorter. If the <code>one_shot</code> flag is set to <code>True</code>, the duration returned is ignored.</p>
|
||||
<p><strong>Note</strong>: Unlike most module callbacks in Synapse, this one is <em>synchronous</em>. This is
|
||||
because asynchronous operations are expected to be run by the async context manager.</p>
|
||||
<p>This callback is required when registering any other background update controller callback.</p>
|
||||
<h3 id="default_batch_size"><a class="header" href="#default_batch_size"><code>default_batch_size</code></a></h3>
|
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<p><em>First introduced in Synapse v1.49.0</em></p>
|
||||
<pre><code class="language-python">async def default_batch_size(update_name: str, database_name: str) -> int
|
||||
</code></pre>
|
||||
<p>Called before the first iteration of a background update, with the name of the update and
|
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of the database. The module must return the number of elements to process in this first
|
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iteration.</p>
|
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<p>If this callback is not defined, Synapse will use a default value of 100.</p>
|
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<h3 id="min_batch_size"><a class="header" href="#min_batch_size"><code>min_batch_size</code></a></h3>
|
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<p><em>First introduced in Synapse v1.49.0</em></p>
|
||||
<pre><code class="language-python">async def min_batch_size(update_name: str, database_name: str) -> int
|
||||
</code></pre>
|
||||
<p>Called before running a new batch for a background update, with the name of the update and
|
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of the database. The module must return an integer representing the minimum number of
|
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elements to process in this iteration. This number must be at least 1, and is used to
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ensure that progress is always made.</p>
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|
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<p><strong>Note</strong>: When using third-party modules, you effectively allow someone else to run
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|
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<h2 id="using-modules"><a class="header" href="#using-modules">Using modules</a></h2>
|
||||
<p>To use a module on Synapse, add it to the <code>modules</code> section of the configuration file:</p>
|
||||
<pre><code class="language-yaml">modules:
|
||||
- module: my_super_module.MySuperClass
|
||||
config:
|
||||
do_thing: true
|
||||
- module: my_other_super_module.SomeClass
|
||||
config: {}
|
||||
</code></pre>
|
||||
<p>Each module is defined by a path to a Python class as well as a configuration. This
|
||||
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|
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<h2 id="using-multiple-modules"><a class="header" href="#using-multiple-modules">Using multiple modules</a></h2>
|
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<p>The order in which modules are listed in this section is important. When processing an
|
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|
||||
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|
||||
<li>If several modules register the same callback, the callback registered by the module
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|
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|
||||
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|
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|
||||
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|
||||
<p>Note that Synapse doesn't allow multiple modules implementing authentication checkers via
|
||||
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|
||||
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|
||||
<h2 id="current-status"><a class="header" href="#current-status">Current status</a></h2>
|
||||
<p>We are currently in the process of migrating module interfaces to this system. While some
|
||||
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|
||||
another part of Synapse's configuration file.</p>
|
||||
<p>Currently, only the following pre-existing interfaces are compatible with this new system:</p>
|
||||
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|
||||
<li>spam checker</li>
|
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<h1 id="password-auth-provider-callbacks"><a class="header" href="#password-auth-provider-callbacks">Password auth provider callbacks</a></h1>
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<p>Password auth providers offer a way for server administrators to integrate
|
||||
their Synapse installation with an external authentication system. The callbacks can be
|
||||
registered by using the Module API's <code>register_password_auth_provider_callbacks</code> method.</p>
|
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<h2 id="callbacks"><a class="header" href="#callbacks">Callbacks</a></h2>
|
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<h3 id="auth_checkers"><a class="header" href="#auth_checkers"><code>auth_checkers</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.46.0</em></p>
|
||||
<pre><code class="language-python">auth_checkers: Dict[Tuple[str, Tuple[str, ...]], Callable]
|
||||
</code></pre>
|
||||
<p>A dict mapping from tuples of a login type identifier (such as <code>m.login.password</code>) and a
|
||||
tuple of field names (such as <code>("password", "secret_thing")</code>) to authentication checking
|
||||
callbacks, which should be of the following form:</p>
|
||||
<pre><code class="language-python">async def check_auth(
|
||||
user: str,
|
||||
login_type: str,
|
||||
login_dict: "synapse.module_api.JsonDict",
|
||||
) -> Optional[
|
||||
Tuple[
|
||||
str,
|
||||
Optional[Callable[["synapse.module_api.LoginResponse"], Awaitable[None]]]
|
||||
]
|
||||
]
|
||||
</code></pre>
|
||||
<p>The login type and field names should be provided by the user in the
|
||||
request to the <code>/login</code> API. <a href="https://matrix.org/docs/spec/client_server/latest#authentication-types">The Matrix specification</a>
|
||||
defines some types, however user defined ones are also allowed.</p>
|
||||
<p>The callback is passed the <code>user</code> field provided by the client (which might not be in
|
||||
<code>@username:server</code> form), the login type, and a dictionary of login secrets passed by
|
||||
the client.</p>
|
||||
<p>If the authentication is successful, the module must return the user's Matrix ID (e.g.
|
||||
<code>@alice:example.com</code>) and optionally a callback to be called with the response to the
|
||||
<code>/login</code> request. If the module doesn't wish to return a callback, it must return <code>None</code>
|
||||
instead.</p>
|
||||
<p>If the authentication is unsuccessful, the module must return <code>None</code>.</p>
|
||||
<p>If multiple modules register an auth checker for the same login type but with different
|
||||
fields, Synapse will refuse to start.</p>
|
||||
<p>If multiple modules register an auth checker for the same login type with the same fields,
|
||||
then the callbacks will be executed in order, until one returns a Matrix User ID (and
|
||||
optionally a callback). In that case, the return value of that callback will be accepted
|
||||
and subsequent callbacks will not be fired. If every callback returns <code>None</code>, then the
|
||||
authentication fails.</p>
|
||||
<h3 id="check_3pid_auth"><a class="header" href="#check_3pid_auth"><code>check_3pid_auth</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.46.0</em></p>
|
||||
<pre><code class="language-python">async def check_3pid_auth(
|
||||
medium: str,
|
||||
address: str,
|
||||
password: str,
|
||||
) -> Optional[
|
||||
Tuple[
|
||||
str,
|
||||
Optional[Callable[["synapse.module_api.LoginResponse"], Awaitable[None]]]
|
||||
]
|
||||
]
|
||||
</code></pre>
|
||||
<p>Called when a user attempts to register or log in with a third party identifier,
|
||||
such as email. It is passed the medium (eg. <code>email</code>), an address (eg. <code>jdoe@example.com</code>)
|
||||
and the user's password.</p>
|
||||
<p>If the authentication is successful, the module must return the user's Matrix ID (e.g.
|
||||
<code>@alice:example.com</code>) and optionally a callback to be called with the response to the <code>/login</code> request.
|
||||
If the module doesn't wish to return a callback, it must return None instead.</p>
|
||||
<p>If the authentication is unsuccessful, the module must return <code>None</code>.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>None</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>None</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback. If every callback returns <code>None</code>,
|
||||
the authentication is denied.</p>
|
||||
<h3 id="on_logged_out"><a class="header" href="#on_logged_out"><code>on_logged_out</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.46.0</em></p>
|
||||
<pre><code class="language-python">async def on_logged_out(
|
||||
user_id: str,
|
||||
device_id: Optional[str],
|
||||
access_token: str
|
||||
) -> None
|
||||
</code></pre>
|
||||
<p>Called during a logout request for a user. It is passed the qualified user ID, the ID of the
|
||||
deactivated device (if any: access tokens are occasionally created without an associated
|
||||
device ID), and the (now deactivated) access token.</p>
|
||||
<p>If multiple modules implement this callback, Synapse runs them all in order.</p>
|
||||
<h3 id="get_username_for_registration"><a class="header" href="#get_username_for_registration"><code>get_username_for_registration</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.52.0</em></p>
|
||||
<pre><code class="language-python">async def get_username_for_registration(
|
||||
uia_results: Dict[str, Any],
|
||||
params: Dict[str, Any],
|
||||
) -> Optional[str]
|
||||
</code></pre>
|
||||
<p>Called when registering a new user. The module can return a username to set for the user
|
||||
being registered by returning it as a string, or <code>None</code> if it doesn't wish to force a
|
||||
username for this user. If a username is returned, it will be used as the local part of a
|
||||
user's full Matrix ID (e.g. it's <code>alice</code> in <code>@alice:example.com</code>).</p>
|
||||
<p>This callback is called once <a href="https://spec.matrix.org/latest/client-server-api/#user-interactive-authentication-api">User-Interactive Authentication</a>
|
||||
has been completed by the user. It is not called when registering a user via SSO. It is
|
||||
passed two dictionaries, which include the information that the user has provided during
|
||||
the registration process.</p>
|
||||
<p>The first dictionary contains the results of the <a href="https://spec.matrix.org/latest/client-server-api/#user-interactive-authentication-api">User-Interactive Authentication</a>
|
||||
flow followed by the user. Its keys are the identifiers of every step involved in the flow,
|
||||
associated with either a boolean value indicating whether the step was correctly completed,
|
||||
or additional information (e.g. email address, phone number...). A list of most existing
|
||||
identifiers can be found in the <a href="https://spec.matrix.org/v1.1/client-server-api/#authentication-types">Matrix specification</a>.
|
||||
Here's an example featuring all currently supported keys:</p>
|
||||
<pre><code class="language-python">{
|
||||
"m.login.dummy": True, # Dummy authentication
|
||||
"m.login.terms": True, # User has accepted the terms of service for the homeserver
|
||||
"m.login.recaptcha": True, # User has completed the recaptcha challenge
|
||||
"m.login.email.identity": { # User has provided and verified an email address
|
||||
"medium": "email",
|
||||
"address": "alice@example.com",
|
||||
"validated_at": 1642701357084,
|
||||
},
|
||||
"m.login.msisdn": { # User has provided and verified a phone number
|
||||
"medium": "msisdn",
|
||||
"address": "33123456789",
|
||||
"validated_at": 1642701357084,
|
||||
},
|
||||
"m.login.registration_token": "sometoken", # User has registered through a registration token
|
||||
}
|
||||
</code></pre>
|
||||
<p>The second dictionary contains the parameters provided by the user's client in the request
|
||||
to <code>/_matrix/client/v3/register</code>. See the <a href="https://spec.matrix.org/latest/client-server-api/#post_matrixclientv3register">Matrix specification</a>
|
||||
for a complete list of these parameters.</p>
|
||||
<p>If the module cannot, or does not wish to, generate a username for this user, it must
|
||||
return <code>None</code>.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>None</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>None</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback. If every callback returns <code>None</code>,
|
||||
the username provided by the user is used, if any (otherwise one is automatically
|
||||
generated).</p>
|
||||
<h3 id="get_displayname_for_registration"><a class="header" href="#get_displayname_for_registration"><code>get_displayname_for_registration</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.54.0</em></p>
|
||||
<pre><code class="language-python">async def get_displayname_for_registration(
|
||||
uia_results: Dict[str, Any],
|
||||
params: Dict[str, Any],
|
||||
) -> Optional[str]
|
||||
</code></pre>
|
||||
<p>Called when registering a new user. The module can return a display name to set for the
|
||||
user being registered by returning it as a string, or <code>None</code> if it doesn't wish to force a
|
||||
display name for this user.</p>
|
||||
<p>This callback is called once <a href="https://spec.matrix.org/latest/client-server-api/#user-interactive-authentication-api">User-Interactive Authentication</a>
|
||||
has been completed by the user. It is not called when registering a user via SSO. It is
|
||||
passed two dictionaries, which include the information that the user has provided during
|
||||
the registration process. These dictionaries are identical to the ones passed to
|
||||
<a href="#get_username_for_registration"><code>get_username_for_registration</code></a>, so refer to the
|
||||
documentation of this callback for more information about them.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>None</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>None</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback. If every callback returns <code>None</code>,
|
||||
the username will be used (e.g. <code>alice</code> if the user being registered is <code>@alice:example.com</code>).</p>
|
||||
<h2 id="is_3pid_allowed"><a class="header" href="#is_3pid_allowed"><code>is_3pid_allowed</code></a></h2>
|
||||
<p><em>First introduced in Synapse v1.53.0</em></p>
|
||||
<pre><code class="language-python">async def is_3pid_allowed(self, medium: str, address: str, registration: bool) -> bool
|
||||
</code></pre>
|
||||
<p>Called when attempting to bind a third-party identifier (i.e. an email address or a phone
|
||||
number). The module is given the medium of the third-party identifier (which is <code>email</code> if
|
||||
the identifier is an email address, or <code>msisdn</code> if the identifier is a phone number) and
|
||||
its address, as well as a boolean indicating whether the attempt to bind is happening as
|
||||
part of registering a new user. The module must return a boolean indicating whether the
|
||||
identifier can be allowed to be bound to an account on the local homeserver.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>True</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>True</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback.</p>
|
||||
<h2 id="example"><a class="header" href="#example">Example</a></h2>
|
||||
<p>The example module below implements authentication checkers for two different login types: </p>
|
||||
<ul>
|
||||
<li><code>my.login.type</code>
|
||||
<ul>
|
||||
<li>Expects a <code>my_field</code> field to be sent to <code>/login</code></li>
|
||||
<li>Is checked by the method: <code>self.check_my_login</code></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><code>m.login.password</code> (defined in <a href="https://matrix.org/docs/spec/client_server/latest#password-based">the spec</a>)
|
||||
<ul>
|
||||
<li>Expects a <code>password</code> field to be sent to <code>/login</code></li>
|
||||
<li>Is checked by the method: <code>self.check_pass</code></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
<pre><code class="language-python">from typing import Awaitable, Callable, Optional, Tuple
|
||||
|
||||
import synapse
|
||||
from synapse import module_api
|
||||
|
||||
|
||||
class MyAuthProvider:
|
||||
def __init__(self, config: dict, api: module_api):
|
||||
|
||||
self.api = api
|
||||
|
||||
self.credentials = {
|
||||
"bob": "building",
|
||||
"@scoop:matrix.org": "digging",
|
||||
}
|
||||
|
||||
api.register_password_auth_provider_callbacks(
|
||||
auth_checkers={
|
||||
("my.login_type", ("my_field",)): self.check_my_login,
|
||||
("m.login.password", ("password",)): self.check_pass,
|
||||
},
|
||||
)
|
||||
|
||||
async def check_my_login(
|
||||
self,
|
||||
username: str,
|
||||
login_type: str,
|
||||
login_dict: "synapse.module_api.JsonDict",
|
||||
) -> Optional[
|
||||
Tuple[
|
||||
str,
|
||||
Optional[Callable[["synapse.module_api.LoginResponse"], Awaitable[None]]],
|
||||
]
|
||||
]:
|
||||
if login_type != "my.login_type":
|
||||
return None
|
||||
|
||||
if self.credentials.get(username) == login_dict.get("my_field"):
|
||||
return (self.api.get_qualified_user_id(username), None)
|
||||
|
||||
async def check_pass(
|
||||
self,
|
||||
username: str,
|
||||
login_type: str,
|
||||
login_dict: "synapse.module_api.JsonDict",
|
||||
) -> Optional[
|
||||
Tuple[
|
||||
str,
|
||||
Optional[Callable[["synapse.module_api.LoginResponse"], Awaitable[None]]],
|
||||
]
|
||||
]:
|
||||
if login_type != "m.login.password":
|
||||
return None
|
||||
|
||||
if self.credentials.get(username) == login_dict.get("password"):
|
||||
return (self.api.get_qualified_user_id(username), None)
|
||||
</code></pre>
|
||||
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<h1 id="porting-an-existing-module-that-uses-the-old-interface"><a class="header" href="#porting-an-existing-module-that-uses-the-old-interface">Porting an existing module that uses the old interface</a></h1>
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<h1 id="presence-router-callbacks"><a class="header" href="#presence-router-callbacks">Presence router callbacks</a></h1>
|
||||
<p>Presence router callbacks allow module developers to specify additional users (local or remote)
|
||||
to receive certain presence updates from local users. Presence router callbacks can be
|
||||
registered using the module API's <code>register_presence_router_callbacks</code> method.</p>
|
||||
<h2 id="callbacks"><a class="header" href="#callbacks">Callbacks</a></h2>
|
||||
<p>The available presence router callbacks are:</p>
|
||||
<h3 id="get_users_for_states"><a class="header" href="#get_users_for_states"><code>get_users_for_states</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.42.0</em></p>
|
||||
<pre><code class="language-python">async def get_users_for_states(
|
||||
state_updates: Iterable["synapse.api.UserPresenceState"],
|
||||
) -> Dict[str, Set["synapse.api.UserPresenceState"]]
|
||||
</code></pre>
|
||||
<p><strong>Requires</strong> <code>get_interested_users</code> to also be registered</p>
|
||||
<p>Called when processing updates to the presence state of one or more users. This callback can
|
||||
be used to instruct the server to forward that presence state to specific users. The module
|
||||
must return a dictionary that maps from Matrix user IDs (which can be local or remote) to the
|
||||
<code>UserPresenceState</code> changes that they should be forwarded.</p>
|
||||
<p>Synapse will then attempt to send the specified presence updates to each user when possible.</p>
|
||||
<p>If multiple modules implement this callback, Synapse merges all the dictionaries returned
|
||||
by the callbacks. If multiple callbacks return a dictionary containing the same key,
|
||||
Synapse concatenates the sets associated with this key from each dictionary. </p>
|
||||
<h3 id="get_interested_users"><a class="header" href="#get_interested_users"><code>get_interested_users</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.42.0</em></p>
|
||||
<pre><code class="language-python">async def get_interested_users(
|
||||
user_id: str
|
||||
) -> Union[Set[str], "synapse.module_api.PRESENCE_ALL_USERS"]
|
||||
</code></pre>
|
||||
<p><strong>Requires</strong> <code>get_users_for_states</code> to also be registered</p>
|
||||
<p>Called when determining which users someone should be able to see the presence state of. This
|
||||
callback should return complementary results to <code>get_users_for_state</code> or the presence information
|
||||
may not be properly forwarded.</p>
|
||||
<p>The callback is given the Matrix user ID for a local user that is requesting presence data and
|
||||
should return the Matrix user IDs of the users whose presence state they are allowed to
|
||||
query. The returned users can be local or remote. </p>
|
||||
<p>Alternatively the callback can return <code>synapse.module_api.PRESENCE_ALL_USERS</code>
|
||||
to indicate that the user should receive updates from all known users.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. Synapse
|
||||
calls each callback one by one, and use a concatenation of all the <code>set</code>s returned by the
|
||||
callbacks. If one callback returns <code>synapse.module_api.PRESENCE_ALL_USERS</code>, Synapse uses
|
||||
this value instead. If this happens, Synapse does not call any of the subsequent
|
||||
implementations of this callback.</p>
|
||||
<h2 id="example"><a class="header" href="#example">Example</a></h2>
|
||||
<p>The example below is a module that implements both presence router callbacks, and ensures
|
||||
that <code>@alice:example.org</code> receives all presence updates from <code>@bob:example.com</code> and
|
||||
<code>@charlie:somewhere.org</code>, regardless of whether Alice shares a room with any of them.</p>
|
||||
<pre><code class="language-python">from typing import Dict, Iterable, Set, Union
|
||||
|
||||
from synapse.module_api import ModuleApi
|
||||
|
||||
|
||||
class CustomPresenceRouter:
|
||||
def __init__(self, config: dict, api: ModuleApi):
|
||||
self.api = api
|
||||
|
||||
self.api.register_presence_router_callbacks(
|
||||
get_users_for_states=self.get_users_for_states,
|
||||
get_interested_users=self.get_interested_users,
|
||||
)
|
||||
|
||||
async def get_users_for_states(
|
||||
self,
|
||||
state_updates: Iterable["synapse.api.UserPresenceState"],
|
||||
) -> Dict[str, Set["synapse.api.UserPresenceState"]]:
|
||||
res = {}
|
||||
for update in state_updates:
|
||||
if (
|
||||
update.user_id == "@bob:example.com"
|
||||
or update.user_id == "@charlie:somewhere.org"
|
||||
):
|
||||
res.setdefault("@alice:example.com", set()).add(update)
|
||||
|
||||
return res
|
||||
|
||||
async def get_interested_users(
|
||||
self,
|
||||
user_id: str,
|
||||
) -> Union[Set[str], "synapse.module_api.PRESENCE_ALL_USERS"]:
|
||||
if user_id == "@alice:example.com":
|
||||
return {"@bob:example.com", "@charlie:somewhere.org"}
|
||||
|
||||
return set()
|
||||
</code></pre>
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<h1 id="spam-checker-callbacks"><a class="header" href="#spam-checker-callbacks">Spam checker callbacks</a></h1>
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<p>Spam checker callbacks allow module developers to implement spam mitigation actions for
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|
||||
<code>register_spam_checker_callbacks</code> method.</p>
|
||||
<h2 id="callbacks"><a class="header" href="#callbacks">Callbacks</a></h2>
|
||||
<p>The available spam checker callbacks are:</p>
|
||||
<h3 id="check_event_for_spam"><a class="header" href="#check_event_for_spam"><code>check_event_for_spam</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.37.0</em></p>
|
||||
<p><em>Changed in Synapse v1.60.0: <code>synapse.module_api.NOT_SPAM</code> and <code>synapse.module_api.errors.Codes</code> can be returned by this callback. Returning a boolean or a string is now deprecated.</em> </p>
|
||||
<pre><code class="language-python">async def check_event_for_spam(event: "synapse.module_api.EventBase") -> Union["synapse.module_api.NOT_SPAM", "synapse.module_api.errors.Codes", str, bool]
|
||||
</code></pre>
|
||||
<p>Called when receiving an event from a client or via federation. The callback must return one of:</p>
|
||||
<ul>
|
||||
<li><code>synapse.module_api.NOT_SPAM</code>, to allow the operation. Other callbacks may still
|
||||
decide to reject it.</li>
|
||||
<li><code>synapse.module_api.errors.Codes</code> to reject the operation with an error code. In case
|
||||
of doubt, <code>synapse.module_api.errors.Codes.FORBIDDEN</code> is a good error code.</li>
|
||||
<li>(deprecated) a non-<code>Codes</code> <code>str</code> to reject the operation and specify an error message. Note that clients
|
||||
typically will not localize the error message to the user's preferred locale.</li>
|
||||
<li>(deprecated) <code>False</code>, which is the same as returning <code>synapse.module_api.NOT_SPAM</code>.</li>
|
||||
<li>(deprecated) <code>True</code>, which is the same as returning <code>synapse.module_api.errors.Codes.FORBIDDEN</code>.</li>
|
||||
</ul>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>synapse.module_api.NOT_SPAM</code>, Synapse falls through to the next one.
|
||||
The value of the first callback that does not return <code>synapse.module_api.NOT_SPAM</code> will
|
||||
be used. If this happens, Synapse will not call any of the subsequent implementations of
|
||||
this callback.</p>
|
||||
<h3 id="user_may_join_room"><a class="header" href="#user_may_join_room"><code>user_may_join_room</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.37.0</em></p>
|
||||
<p><em>Changed in Synapse v1.61.0: <code>synapse.module_api.NOT_SPAM</code> and <code>synapse.module_api.errors.Codes</code> can be returned by this callback. Returning a boolean is now deprecated.</em> </p>
|
||||
<pre><code class="language-python">async def user_may_join_room(user: str, room: str, is_invited: bool) -> Union["synapse.module_api.NOT_SPAM", "synapse.module_api.errors.Codes", bool]
|
||||
</code></pre>
|
||||
<p>Called when a user is trying to join a room. The user is represented by their Matrix user ID (e.g.
|
||||
<code>@alice:example.com</code>) and the room is represented by its Matrix ID (e.g.
|
||||
<code>!room:example.com</code>). The module is also given a boolean to indicate whether the user
|
||||
currently has a pending invite in the room.</p>
|
||||
<p>This callback isn't called if the join is performed by a server administrator, or in the
|
||||
context of a room creation.</p>
|
||||
<p>The callback must return one of:</p>
|
||||
<ul>
|
||||
<li><code>synapse.module_api.NOT_SPAM</code>, to allow the operation. Other callbacks may still
|
||||
decide to reject it.</li>
|
||||
<li><code>synapse.module_api.errors.Codes</code> to reject the operation with an error code. In case
|
||||
of doubt, <code>synapse.module_api.errors.Codes.FORBIDDEN</code> is a good error code.</li>
|
||||
<li>(deprecated) <code>False</code>, which is the same as returning <code>synapse.module_api.NOT_SPAM</code>.</li>
|
||||
<li>(deprecated) <code>True</code>, which is the same as returning <code>synapse.module_api.errors.Codes.FORBIDDEN</code>.</li>
|
||||
</ul>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>synapse.module_api.NOT_SPAM</code>, Synapse falls through to the next one.
|
||||
The value of the first callback that does not return <code>synapse.module_api.NOT_SPAM</code> will
|
||||
be used. If this happens, Synapse will not call any of the subsequent implementations of
|
||||
this callback.</p>
|
||||
<h3 id="user_may_invite"><a class="header" href="#user_may_invite"><code>user_may_invite</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.37.0</em></p>
|
||||
<p><em>Changed in Synapse v1.62.0: <code>synapse.module_api.NOT_SPAM</code> and <code>synapse.module_api.errors.Codes</code> can be returned by this callback. Returning a boolean is now deprecated.</em> </p>
|
||||
<pre><code class="language-python">async def user_may_invite(inviter: str, invitee: str, room_id: str) -> Union["synapse.module_api.NOT_SPAM", "synapse.module_api.errors.Codes", bool]
|
||||
</code></pre>
|
||||
<p>Called when processing an invitation. Both inviter and invitee are
|
||||
represented by their Matrix user ID (e.g. <code>@alice:example.com</code>).</p>
|
||||
<p>The callback must return one of:</p>
|
||||
<ul>
|
||||
<li>
|
||||
<p><code>synapse.module_api.NOT_SPAM</code>, to allow the operation. Other callbacks may still
|
||||
decide to reject it.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><code>synapse.module_api.errors.Codes</code> to reject the operation with an error code. In case
|
||||
of doubt, <code>synapse.module_api.errors.Codes.FORBIDDEN</code> is a good error code.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>False</code>, which is the same as returning <code>synapse.module_api.NOT_SPAM</code>.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>True</code>, which is the same as returning <code>synapse.module_api.errors.Codes.FORBIDDEN</code>.</p>
|
||||
</li>
|
||||
</ul>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>synapse.module_api.NOT_SPAM</code>, Synapse falls through to the next one.
|
||||
The value of the first callback that does not return <code>synapse.module_api.NOT_SPAM</code> will
|
||||
be used. If this happens, Synapse will not call any of the subsequent implementations of
|
||||
this callback.</p>
|
||||
<h3 id="user_may_send_3pid_invite"><a class="header" href="#user_may_send_3pid_invite"><code>user_may_send_3pid_invite</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.45.0</em></p>
|
||||
<p><em>Changed in Synapse v1.62.0: <code>synapse.module_api.NOT_SPAM</code> and <code>synapse.module_api.errors.Codes</code> can be returned by this callback. Returning a boolean is now deprecated.</em> </p>
|
||||
<pre><code class="language-python">async def user_may_send_3pid_invite(
|
||||
inviter: str,
|
||||
medium: str,
|
||||
address: str,
|
||||
room_id: str,
|
||||
) -> Union["synapse.module_api.NOT_SPAM", "synapse.module_api.errors.Codes", bool]
|
||||
</code></pre>
|
||||
<p>Called when processing an invitation using a third-party identifier (also called a 3PID,
|
||||
e.g. an email address or a phone number). </p>
|
||||
<p>The inviter is represented by their Matrix user ID (e.g. <code>@alice:example.com</code>), and the
|
||||
invitee is represented by its medium (e.g. "email") and its address
|
||||
(e.g. <code>alice@example.com</code>). See <a href="https://matrix.org/docs/spec/appendices#pid-types">the Matrix specification</a>
|
||||
for more information regarding third-party identifiers.</p>
|
||||
<p>For example, a call to this callback to send an invitation to the email address
|
||||
<code>alice@example.com</code> would look like this:</p>
|
||||
<pre><code class="language-python">await user_may_send_3pid_invite(
|
||||
"@bob:example.com", # The inviter's user ID
|
||||
"email", # The medium of the 3PID to invite
|
||||
"alice@example.com", # The address of the 3PID to invite
|
||||
"!some_room:example.com", # The ID of the room to send the invite into
|
||||
)
|
||||
</code></pre>
|
||||
<p><strong>Note</strong>: If the third-party identifier is already associated with a matrix user ID,
|
||||
<a href="#user_may_invite"><code>user_may_invite</code></a> will be used instead.</p>
|
||||
<p>The callback must return one of:</p>
|
||||
<ul>
|
||||
<li>
|
||||
<p><code>synapse.module_api.NOT_SPAM</code>, to allow the operation. Other callbacks may still
|
||||
decide to reject it.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><code>synapse.module_api.errors.Codes</code> to reject the operation with an error code. In case
|
||||
of doubt, <code>synapse.module_api.errors.Codes.FORBIDDEN</code> is a good error code.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>False</code>, which is the same as returning <code>synapse.module_api.NOT_SPAM</code>.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>True</code>, which is the same as returning <code>synapse.module_api.errors.Codes.FORBIDDEN</code>.</p>
|
||||
</li>
|
||||
</ul>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>synapse.module_api.NOT_SPAM</code>, Synapse falls through to the next one.
|
||||
The value of the first callback that does not return <code>synapse.module_api.NOT_SPAM</code> will
|
||||
be used. If this happens, Synapse will not call any of the subsequent implementations of
|
||||
this callback.</p>
|
||||
<h3 id="user_may_create_room"><a class="header" href="#user_may_create_room"><code>user_may_create_room</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.37.0</em></p>
|
||||
<p><em>Changed in Synapse v1.62.0: <code>synapse.module_api.NOT_SPAM</code> and <code>synapse.module_api.errors.Codes</code> can be returned by this callback. Returning a boolean is now deprecated.</em> </p>
|
||||
<pre><code class="language-python">async def user_may_create_room(user_id: str) -> Union["synapse.module_api.NOT_SPAM", "synapse.module_api.errors.Codes", bool]
|
||||
</code></pre>
|
||||
<p>Called when processing a room creation request.</p>
|
||||
<p>The callback must return one of:</p>
|
||||
<ul>
|
||||
<li>
|
||||
<p><code>synapse.module_api.NOT_SPAM</code>, to allow the operation. Other callbacks may still
|
||||
decide to reject it.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><code>synapse.module_api.errors.Codes</code> to reject the operation with an error code. In case
|
||||
of doubt, <code>synapse.module_api.errors.Codes.FORBIDDEN</code> is a good error code.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>False</code>, which is the same as returning <code>synapse.module_api.NOT_SPAM</code>.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>True</code>, which is the same as returning <code>synapse.module_api.errors.Codes.FORBIDDEN</code>.</p>
|
||||
</li>
|
||||
</ul>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>synapse.module_api.NOT_SPAM</code>, Synapse falls through to the next one.
|
||||
The value of the first callback that does not return <code>synapse.module_api.NOT_SPAM</code> will
|
||||
be used. If this happens, Synapse will not call any of the subsequent implementations of
|
||||
this callback.</p>
|
||||
<h3 id="user_may_create_room_alias"><a class="header" href="#user_may_create_room_alias"><code>user_may_create_room_alias</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.37.0</em></p>
|
||||
<p><em>Changed in Synapse v1.62.0: <code>synapse.module_api.NOT_SPAM</code> and <code>synapse.module_api.errors.Codes</code> can be returned by this callback. Returning a boolean is now deprecated.</em> </p>
|
||||
<pre><code class="language-python">async def user_may_create_room_alias(user_id: str, room_alias: "synapse.module_api.RoomAlias") -> Union["synapse.module_api.NOT_SPAM", "synapse.module_api.errors.Codes", bool]
|
||||
</code></pre>
|
||||
<p>Called when trying to associate an alias with an existing room.</p>
|
||||
<p>The callback must return one of:</p>
|
||||
<ul>
|
||||
<li>
|
||||
<p><code>synapse.module_api.NOT_SPAM</code>, to allow the operation. Other callbacks may still
|
||||
decide to reject it.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><code>synapse.module_api.errors.Codes</code> to reject the operation with an error code. In case
|
||||
of doubt, <code>synapse.module_api.errors.Codes.FORBIDDEN</code> is a good error code.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>False</code>, which is the same as returning <code>synapse.module_api.NOT_SPAM</code>.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>True</code>, which is the same as returning <code>synapse.module_api.errors.Codes.FORBIDDEN</code>.</p>
|
||||
</li>
|
||||
</ul>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>synapse.module_api.NOT_SPAM</code>, Synapse falls through to the next one.
|
||||
The value of the first callback that does not return <code>synapse.module_api.NOT_SPAM</code> will
|
||||
be used. If this happens, Synapse will not call any of the subsequent implementations of
|
||||
this callback.</p>
|
||||
<h3 id="user_may_publish_room"><a class="header" href="#user_may_publish_room"><code>user_may_publish_room</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.37.0</em></p>
|
||||
<p><em>Changed in Synapse v1.62.0: <code>synapse.module_api.NOT_SPAM</code> and <code>synapse.module_api.errors.Codes</code> can be returned by this callback. Returning a boolean is now deprecated.</em> </p>
|
||||
<pre><code class="language-python">async def user_may_publish_room(user_id: str, room_id: str) -> Union["synapse.module_api.NOT_SPAM", "synapse.module_api.errors.Codes", bool]
|
||||
</code></pre>
|
||||
<p>Called when trying to publish a room to the homeserver's public rooms directory.</p>
|
||||
<p>The callback must return one of:</p>
|
||||
<ul>
|
||||
<li>
|
||||
<p><code>synapse.module_api.NOT_SPAM</code>, to allow the operation. Other callbacks may still
|
||||
decide to reject it.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><code>synapse.module_api.errors.Codes</code> to reject the operation with an error code. In case
|
||||
of doubt, <code>synapse.module_api.errors.Codes.FORBIDDEN</code> is a good error code.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>False</code>, which is the same as returning <code>synapse.module_api.NOT_SPAM</code>.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>True</code>, which is the same as returning <code>synapse.module_api.errors.Codes.FORBIDDEN</code>.</p>
|
||||
</li>
|
||||
</ul>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>synapse.module_api.NOT_SPAM</code>, Synapse falls through to the next one.
|
||||
The value of the first callback that does not return <code>synapse.module_api.NOT_SPAM</code> will
|
||||
be used. If this happens, Synapse will not call any of the subsequent implementations of
|
||||
this callback.</p>
|
||||
<h3 id="check_username_for_spam"><a class="header" href="#check_username_for_spam"><code>check_username_for_spam</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.37.0</em></p>
|
||||
<pre><code class="language-python">async def check_username_for_spam(user_profile: synapse.module_api.UserProfile) -> bool
|
||||
</code></pre>
|
||||
<p>Called when computing search results in the user directory. The module must return a
|
||||
<code>bool</code> indicating whether the given user should be excluded from user directory
|
||||
searches. Return <code>True</code> to indicate that the user is spammy and exclude them from
|
||||
search results; otherwise return <code>False</code>.</p>
|
||||
<p>The profile is represented as a dictionary with the following keys:</p>
|
||||
<ul>
|
||||
<li><code>user_id: str</code>. The Matrix ID for this user.</li>
|
||||
<li><code>display_name: Optional[str]</code>. The user's display name, or <code>None</code> if this user
|
||||
has not set a display name.</li>
|
||||
<li><code>avatar_url: Optional[str]</code>. The <code>mxc://</code> URL to the user's avatar, or <code>None</code>
|
||||
if this user has not set an avatar.</li>
|
||||
</ul>
|
||||
<p>The module is given a copy of the original dictionary, so modifying it from within the
|
||||
module cannot modify a user's profile when included in user directory search results.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>False</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>False</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback.</p>
|
||||
<h3 id="check_registration_for_spam"><a class="header" href="#check_registration_for_spam"><code>check_registration_for_spam</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.37.0</em></p>
|
||||
<pre><code class="language-python">async def check_registration_for_spam(
|
||||
email_threepid: Optional[dict],
|
||||
username: Optional[str],
|
||||
request_info: Collection[Tuple[str, str]],
|
||||
auth_provider_id: Optional[str] = None,
|
||||
) -> "synapse.spam_checker_api.RegistrationBehaviour"
|
||||
</code></pre>
|
||||
<p>Called when registering a new user. The module must return a <code>RegistrationBehaviour</code>
|
||||
indicating whether the registration can go through or must be denied, or whether the user
|
||||
may be allowed to register but will be shadow banned.</p>
|
||||
<p>The arguments passed to this callback are:</p>
|
||||
<ul>
|
||||
<li><code>email_threepid</code>: The email address used for registering, if any.</li>
|
||||
<li><code>username</code>: The username the user would like to register. Can be <code>None</code>, meaning that
|
||||
Synapse will generate one later.</li>
|
||||
<li><code>request_info</code>: A collection of tuples, which first item is a user agent, and which
|
||||
second item is an IP address. These user agents and IP addresses are the ones that were
|
||||
used during the registration process.</li>
|
||||
<li><code>auth_provider_id</code>: The identifier of the SSO authentication provider, if any.</li>
|
||||
</ul>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>RegistrationBehaviour.ALLOW</code>, Synapse falls through to the next one.
|
||||
The value of the first callback that does not return <code>RegistrationBehaviour.ALLOW</code> will
|
||||
be used. If this happens, Synapse will not call any of the subsequent implementations of
|
||||
this callback.</p>
|
||||
<h3 id="check_media_file_for_spam"><a class="header" href="#check_media_file_for_spam"><code>check_media_file_for_spam</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.37.0</em></p>
|
||||
<p><em>Changed in Synapse v1.62.0: <code>synapse.module_api.NOT_SPAM</code> and <code>synapse.module_api.errors.Codes</code> can be returned by this callback. Returning a boolean is now deprecated.</em> </p>
|
||||
<pre><code class="language-python">async def check_media_file_for_spam(
|
||||
file_wrapper: "synapse.rest.media.v1.media_storage.ReadableFileWrapper",
|
||||
file_info: "synapse.rest.media.v1._base.FileInfo",
|
||||
) -> Union["synapse.module_api.NOT_SPAM", "synapse.module_api.errors.Codes", bool]
|
||||
</code></pre>
|
||||
<p>Called when storing a local or remote file.</p>
|
||||
<p>The callback must return one of:</p>
|
||||
<ul>
|
||||
<li>
|
||||
<p><code>synapse.module_api.NOT_SPAM</code>, to allow the operation. Other callbacks may still
|
||||
decide to reject it.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p><code>synapse.module_api.errors.Codes</code> to reject the operation with an error code. In case
|
||||
of doubt, <code>synapse.module_api.errors.Codes.FORBIDDEN</code> is a good error code.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>False</code>, which is the same as returning <code>synapse.module_api.NOT_SPAM</code>.</p>
|
||||
</li>
|
||||
<li>
|
||||
<p>(deprecated) <code>True</code>, which is the same as returning <code>synapse.module_api.errors.Codes.FORBIDDEN</code>.</p>
|
||||
</li>
|
||||
</ul>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>synapse.module_api.NOT_SPAM</code>, Synapse falls through to the next one.
|
||||
The value of the first callback that does not return <code>synapse.module_api.NOT_SPAM</code> will
|
||||
be used. If this happens, Synapse will not call any of the subsequent implementations of
|
||||
this callback.</p>
|
||||
<h3 id="should_drop_federated_event"><a class="header" href="#should_drop_federated_event"><code>should_drop_federated_event</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.60.0</em></p>
|
||||
<pre><code class="language-python">async def should_drop_federated_event(event: "synapse.events.EventBase") -> bool
|
||||
</code></pre>
|
||||
<p>Called when checking whether a remote server can federate an event with us. <strong>Returning
|
||||
<code>True</code> from this function will silently drop a federated event and split-brain our view
|
||||
of a room's DAG, and thus you shouldn't use this callback unless you know what you are
|
||||
doing.</strong></p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>False</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>False</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback.</p>
|
||||
<h2 id="example"><a class="header" href="#example">Example</a></h2>
|
||||
<p>The example below is a module that implements the spam checker callback
|
||||
<code>check_event_for_spam</code> to deny any message sent by users whose Matrix user IDs are
|
||||
mentioned in a configured list, and registers a web resource to the path
|
||||
<code>/_synapse/client/list_spam_checker/is_evil</code> that returns a JSON object indicating
|
||||
whether the provided user appears in that list.</p>
|
||||
<pre><code class="language-python">import json
|
||||
from typing import Union
|
||||
|
||||
from twisted.web.resource import Resource
|
||||
from twisted.web.server import Request
|
||||
|
||||
from synapse.module_api import ModuleApi
|
||||
|
||||
|
||||
class IsUserEvilResource(Resource):
|
||||
def __init__(self, config):
|
||||
super(IsUserEvilResource, self).__init__()
|
||||
self.evil_users = config.get("evil_users") or []
|
||||
|
||||
def render_GET(self, request: Request):
|
||||
user = request.args.get(b"user")[0].decode()
|
||||
request.setHeader(b"Content-Type", b"application/json")
|
||||
return json.dumps({"evil": user in self.evil_users}).encode()
|
||||
|
||||
|
||||
class ListSpamChecker:
|
||||
def __init__(self, config: dict, api: ModuleApi):
|
||||
self.api = api
|
||||
self.evil_users = config.get("evil_users") or []
|
||||
|
||||
self.api.register_spam_checker_callbacks(
|
||||
check_event_for_spam=self.check_event_for_spam,
|
||||
)
|
||||
|
||||
self.api.register_web_resource(
|
||||
path="/_synapse/client/list_spam_checker/is_evil",
|
||||
resource=IsUserEvilResource(config),
|
||||
)
|
||||
|
||||
async def check_event_for_spam(self, event: "synapse.events.EventBase") -> Union[Literal["NOT_SPAM"], Codes]:
|
||||
if event.sender in self.evil_users:
|
||||
return Codes.FORBIDDEN
|
||||
else:
|
||||
return synapse.module_api.NOT_SPAM
|
||||
</code></pre>
|
||||
|
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<h1 id="third-party-rules-callbacks"><a class="header" href="#third-party-rules-callbacks">Third party rules callbacks</a></h1>
|
||||
<p>Third party rules callbacks allow module developers to add extra checks to verify the
|
||||
validity of incoming events. Third party event rules callbacks can be registered using
|
||||
the module API's <code>register_third_party_rules_callbacks</code> method.</p>
|
||||
<h2 id="callbacks"><a class="header" href="#callbacks">Callbacks</a></h2>
|
||||
<p>The available third party rules callbacks are:</p>
|
||||
<h3 id="check_event_allowed"><a class="header" href="#check_event_allowed"><code>check_event_allowed</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.39.0</em></p>
|
||||
<pre><code class="language-python">async def check_event_allowed(
|
||||
event: "synapse.events.EventBase",
|
||||
state_events: "synapse.types.StateMap",
|
||||
) -> Tuple[bool, Optional[dict]]
|
||||
</code></pre>
|
||||
<p><strong><span style="color:red">
|
||||
This callback is very experimental and can and will break without notice. Module developers
|
||||
are encouraged to implement <code>check_event_for_spam</code> from the spam checker category instead.
|
||||
</span></strong></p>
|
||||
<p>Called when processing any incoming event, with the event and a <code>StateMap</code>
|
||||
representing the current state of the room the event is being sent into. A <code>StateMap</code> is
|
||||
a dictionary that maps tuples containing an event type and a state key to the
|
||||
corresponding state event. For example retrieving the room's <code>m.room.create</code> event from
|
||||
the <code>state_events</code> argument would look like this: <code>state_events.get(("m.room.create", ""))</code>.
|
||||
The module must return a boolean indicating whether the event can be allowed.</p>
|
||||
<p>Note that this callback function processes incoming events coming via federation
|
||||
traffic (on top of client traffic). This means denying an event might cause the local
|
||||
copy of the room's history to diverge from that of remote servers. This may cause
|
||||
federation issues in the room. It is strongly recommended to only deny events using this
|
||||
callback function if the sender is a local user, or in a private federation in which all
|
||||
servers are using the same module, with the same configuration.</p>
|
||||
<p>If the boolean returned by the module is <code>True</code>, it may also tell Synapse to replace the
|
||||
event with new data by returning the new event's data as a dictionary. In order to do
|
||||
that, it is recommended the module calls <code>event.get_dict()</code> to get the current event as a
|
||||
dictionary, and modify the returned dictionary accordingly.</p>
|
||||
<p>If <code>check_event_allowed</code> raises an exception, the module is assumed to have failed.
|
||||
The event will not be accepted but is not treated as explicitly rejected, either.
|
||||
An HTTP request causing the module check will likely result in a 500 Internal
|
||||
Server Error.</p>
|
||||
<p>When the boolean returned by the module is <code>False</code>, the event is rejected.
|
||||
(Module developers should not use exceptions for rejection.)</p>
|
||||
<p>Note that replacing the event only works for events sent by local users, not for events
|
||||
received over federation.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>True</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>True</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback.</p>
|
||||
<h3 id="on_create_room"><a class="header" href="#on_create_room"><code>on_create_room</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.39.0</em></p>
|
||||
<pre><code class="language-python">async def on_create_room(
|
||||
requester: "synapse.types.Requester",
|
||||
request_content: dict,
|
||||
is_requester_admin: bool,
|
||||
) -> None
|
||||
</code></pre>
|
||||
<p>Called when processing a room creation request, with the <code>Requester</code> object for the user
|
||||
performing the request, a dictionary representing the room creation request's JSON body
|
||||
(see <a href="https://matrix.org/docs/spec/client_server/latest#post-matrix-client-r0-createroom">the spec</a>
|
||||
for a list of possible parameters), and a boolean indicating whether the user performing
|
||||
the request is a server admin.</p>
|
||||
<p>Modules can modify the <code>request_content</code> (by e.g. adding events to its <code>initial_state</code>),
|
||||
or deny the room's creation by raising a <code>module_api.errors.SynapseError</code>.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns without raising an exception, Synapse falls through to the next one. The
|
||||
room creation will be forbidden as soon as one of the callbacks raises an exception. If
|
||||
this happens, Synapse will not call any of the subsequent implementations of this
|
||||
callback.</p>
|
||||
<h3 id="check_threepid_can_be_invited"><a class="header" href="#check_threepid_can_be_invited"><code>check_threepid_can_be_invited</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.39.0</em></p>
|
||||
<pre><code class="language-python">async def check_threepid_can_be_invited(
|
||||
medium: str,
|
||||
address: str,
|
||||
state_events: "synapse.types.StateMap",
|
||||
) -> bool:
|
||||
</code></pre>
|
||||
<p>Called when processing an invite via a third-party identifier (i.e. email or phone number).
|
||||
The module must return a boolean indicating whether the invite can go through.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>True</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>True</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback.</p>
|
||||
<h3 id="check_visibility_can_be_modified"><a class="header" href="#check_visibility_can_be_modified"><code>check_visibility_can_be_modified</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.39.0</em></p>
|
||||
<pre><code class="language-python">async def check_visibility_can_be_modified(
|
||||
room_id: str,
|
||||
state_events: "synapse.types.StateMap",
|
||||
new_visibility: str,
|
||||
) -> bool:
|
||||
</code></pre>
|
||||
<p>Called when changing the visibility of a room in the local public room directory. The
|
||||
visibility is a string that's either "public" or "private". The module must return a
|
||||
boolean indicating whether the change can go through.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>True</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>True</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback.</p>
|
||||
<h3 id="on_new_event"><a class="header" href="#on_new_event"><code>on_new_event</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.47.0</em></p>
|
||||
<pre><code class="language-python">async def on_new_event(
|
||||
event: "synapse.events.EventBase",
|
||||
state_events: "synapse.types.StateMap",
|
||||
) -> None:
|
||||
</code></pre>
|
||||
<p>Called after sending an event into a room. The module is passed the event, as well
|
||||
as the state of the room <em>after</em> the event. This means that if the event is a state event,
|
||||
it will be included in this state.</p>
|
||||
<p>Note that this callback is called when the event has already been processed and stored
|
||||
into the room, which means this callback cannot be used to deny persisting the event. To
|
||||
deny an incoming event, see <a href="spam_checker_callbacks.html#check_event_for_spam"><code>check_event_for_spam</code></a> instead.</p>
|
||||
<p>If multiple modules implement this callback, Synapse runs them all in order.</p>
|
||||
<h3 id="check_can_shutdown_room"><a class="header" href="#check_can_shutdown_room"><code>check_can_shutdown_room</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.55.0</em></p>
|
||||
<pre><code class="language-python">async def check_can_shutdown_room(
|
||||
user_id: str, room_id: str,
|
||||
) -> bool:
|
||||
</code></pre>
|
||||
<p>Called when an admin user requests the shutdown of a room. The module must return a
|
||||
boolean indicating whether the shutdown can go through. If the callback returns <code>False</code>,
|
||||
the shutdown will not proceed and the caller will see a <code>M_FORBIDDEN</code> error.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>True</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>True</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback.</p>
|
||||
<h3 id="check_can_deactivate_user"><a class="header" href="#check_can_deactivate_user"><code>check_can_deactivate_user</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.55.0</em></p>
|
||||
<pre><code class="language-python">async def check_can_deactivate_user(
|
||||
user_id: str, by_admin: bool,
|
||||
) -> bool:
|
||||
</code></pre>
|
||||
<p>Called when the deactivation of a user is requested. User deactivation can be
|
||||
performed by an admin or the user themselves, so developers are encouraged to check the
|
||||
requester when implementing this callback. The module must return a
|
||||
boolean indicating whether the deactivation can go through. If the callback returns <code>False</code>,
|
||||
the deactivation will not proceed and the caller will see a <code>M_FORBIDDEN</code> error.</p>
|
||||
<p>The module is passed two parameters, <code>user_id</code> which is the ID of the user being deactivated, and <code>by_admin</code> which is <code>True</code> if the request is made by a serve admin, and <code>False</code> otherwise.</p>
|
||||
<p>If multiple modules implement this callback, they will be considered in order. If a
|
||||
callback returns <code>True</code>, Synapse falls through to the next one. The value of the first
|
||||
callback that does not return <code>True</code> will be used. If this happens, Synapse will not call
|
||||
any of the subsequent implementations of this callback.</p>
|
||||
<h3 id="on_profile_update"><a class="header" href="#on_profile_update"><code>on_profile_update</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.54.0</em></p>
|
||||
<pre><code class="language-python">async def on_profile_update(
|
||||
user_id: str,
|
||||
new_profile: "synapse.module_api.ProfileInfo",
|
||||
by_admin: bool,
|
||||
deactivation: bool,
|
||||
) -> None:
|
||||
</code></pre>
|
||||
<p>Called after updating a local user's profile. The update can be triggered either by the
|
||||
user themselves or a server admin. The update can also be triggered by a user being
|
||||
deactivated (in which case their display name is set to an empty string (<code>""</code>) and the
|
||||
avatar URL is set to <code>None</code>). The module is passed the Matrix ID of the user whose profile
|
||||
has been updated, their new profile, as well as a <code>by_admin</code> boolean that is <code>True</code> if the
|
||||
update was triggered by a server admin (and <code>False</code> otherwise), and a <code>deactivated</code>
|
||||
boolean that is <code>True</code> if the update is a result of the user being deactivated.</p>
|
||||
<p>Note that the <code>by_admin</code> boolean is also <code>True</code> if the profile change happens as a result
|
||||
of the user logging in through Single Sign-On, or if a server admin updates their own
|
||||
profile.</p>
|
||||
<p>Per-room profile changes do not trigger this callback to be called. Synapse administrators
|
||||
wishing this callback to be called on every profile change are encouraged to disable
|
||||
per-room profiles globally using the <code>allow_per_room_profiles</code> configuration setting in
|
||||
Synapse's configuration file.
|
||||
This callback is not called when registering a user, even when setting it through the
|
||||
<a href="https://matrix-org.github.io/synapse/latest/modules/password_auth_provider_callbacks.html#get_displayname_for_registration"><code>get_displayname_for_registration</code></a>
|
||||
module callback.</p>
|
||||
<p>If multiple modules implement this callback, Synapse runs them all in order.</p>
|
||||
<h3 id="on_user_deactivation_status_changed"><a class="header" href="#on_user_deactivation_status_changed"><code>on_user_deactivation_status_changed</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.54.0</em></p>
|
||||
<pre><code class="language-python">async def on_user_deactivation_status_changed(
|
||||
user_id: str, deactivated: bool, by_admin: bool
|
||||
) -> None:
|
||||
</code></pre>
|
||||
<p>Called after deactivating a local user, or reactivating them through the admin API. The
|
||||
deactivation can be triggered either by the user themselves or a server admin. The module
|
||||
is passed the Matrix ID of the user whose status is changed, as well as a <code>deactivated</code>
|
||||
boolean that is <code>True</code> if the user is being deactivated and <code>False</code> if they're being
|
||||
reactivated, and a <code>by_admin</code> boolean that is <code>True</code> if the deactivation was triggered by
|
||||
a server admin (and <code>False</code> otherwise). This latter <code>by_admin</code> boolean is always <code>True</code>
|
||||
if the user is being reactivated, as this operation can only be performed through the
|
||||
admin API.</p>
|
||||
<p>If multiple modules implement this callback, Synapse runs them all in order.</p>
|
||||
<h3 id="on_threepid_bind"><a class="header" href="#on_threepid_bind"><code>on_threepid_bind</code></a></h3>
|
||||
<p><em>First introduced in Synapse v1.56.0</em></p>
|
||||
<pre><code class="language-python">async def on_threepid_bind(user_id: str, medium: str, address: str) -> None:
|
||||
</code></pre>
|
||||
<p>Called after creating an association between a local user and a third-party identifier
|
||||
(email address, phone number). The module is given the Matrix ID of the user the
|
||||
association is for, as well as the medium (<code>email</code> or <code>msisdn</code>) and address of the
|
||||
third-party identifier.</p>
|
||||
<p>Note that this callback is <em>not</em> called after a successful association on an <em>identity
|
||||
server</em>.</p>
|
||||
<p>If multiple modules implement this callback, Synapse runs them all in order.</p>
|
||||
<h2 id="example"><a class="header" href="#example">Example</a></h2>
|
||||
<p>The example below is a module that implements the third-party rules callback
|
||||
<code>check_event_allowed</code> to censor incoming messages as dictated by a third-party service.</p>
|
||||
<pre><code class="language-python">from typing import Optional, Tuple
|
||||
|
||||
from synapse.module_api import ModuleApi
|
||||
|
||||
_DEFAULT_CENSOR_ENDPOINT = "https://my-internal-service.local/censor-event"
|
||||
|
||||
class EventCensorer:
|
||||
def __init__(self, config: dict, api: ModuleApi):
|
||||
self.api = api
|
||||
self._endpoint = config.get("endpoint", _DEFAULT_CENSOR_ENDPOINT)
|
||||
|
||||
self.api.register_third_party_rules_callbacks(
|
||||
check_event_allowed=self.check_event_allowed,
|
||||
)
|
||||
|
||||
async def check_event_allowed(
|
||||
self,
|
||||
event: "synapse.events.EventBase",
|
||||
state_events: "synapse.types.StateMap",
|
||||
) -> Tuple[bool, Optional[dict]]:
|
||||
event_dict = event.get_dict()
|
||||
new_event_content = await self.api.http_client.post_json_get_json(
|
||||
uri=self._endpoint, post_json=event_dict,
|
||||
)
|
||||
event_dict["content"] = new_event_content
|
||||
return event_dict
|
||||
</code></pre>
|
||||
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<h1 id="writing-a-module"><a class="header" href="#writing-a-module">Writing a module</a></h1>
|
||||
<p>A module is a Python class that uses Synapse's module API to interact with the
|
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homeserver. It can register callbacks that Synapse will call on specific operations, as
|
||||
well as web resources to attach to Synapse's web server.</p>
|
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<p>When instantiated, a module is given its parsed configuration as well as an instance of
|
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the <code>synapse.module_api.ModuleApi</code> class. The configuration is a dictionary, and is
|
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either the output of the module's <code>parse_config</code> static method (see below), or the
|
||||
configuration associated with the module in Synapse's configuration file.</p>
|
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<p>See the documentation for the <code>ModuleApi</code> class
|
||||
<a href="https://github.com/matrix-org/synapse/blob/master/synapse/module_api/__init__.py">here</a>.</p>
|
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<h2 id="when-synapse-runs-with-several-modules-configured"><a class="header" href="#when-synapse-runs-with-several-modules-configured">When Synapse runs with several modules configured</a></h2>
|
||||
<p>If Synapse is running with other modules configured, the order each module appears in
|
||||
within the <code>modules</code> section of the Synapse configuration file might restrict what it can
|
||||
or cannot register. See <a href="index.html#using-multiple-modules">this section</a> for more
|
||||
information.</p>
|
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<p>On top of the rules listed in the link above, if a callback returns a value that should
|
||||
cause the current operation to fail (e.g. if a callback checking an event returns with a
|
||||
value that should cause the event to be denied), Synapse will fail the operation and
|
||||
ignore any subsequent callbacks that should have been run after this one.</p>
|
||||
<p>The documentation for each callback mentions how Synapse behaves when
|
||||
multiple modules implement it.</p>
|
||||
<h2 id="handling-the-modules-configuration"><a class="header" href="#handling-the-modules-configuration">Handling the module's configuration</a></h2>
|
||||
<p>A module can implement the following static method:</p>
|
||||
<pre><code class="language-python">@staticmethod
|
||||
def parse_config(config: dict) -> Any
|
||||
</code></pre>
|
||||
<p>This method is given a dictionary resulting from parsing the YAML configuration for the
|
||||
module. It may modify it (for example by parsing durations expressed as strings (e.g.
|
||||
"5d") into milliseconds, etc.), and return the modified dictionary. It may also verify
|
||||
that the configuration is correct, and raise an instance of
|
||||
<code>synapse.module_api.errors.ConfigError</code> if not.</p>
|
||||
<h2 id="registering-a-web-resource"><a class="header" href="#registering-a-web-resource">Registering a web resource</a></h2>
|
||||
<p>Modules can register web resources onto Synapse's web server using the following module
|
||||
API method:</p>
|
||||
<pre><code class="language-python">def ModuleApi.register_web_resource(path: str, resource: IResource) -> None
|
||||
</code></pre>
|
||||
<p>The path is the full absolute path to register the resource at. For example, if you
|
||||
register a resource for the path <code>/_synapse/client/my_super_module/say_hello</code>, Synapse
|
||||
will serve it at <code>http(s)://[HS_URL]/_synapse/client/my_super_module/say_hello</code>. Note
|
||||
that Synapse does not allow registering resources for several sub-paths in the <code>/_matrix</code>
|
||||
namespace (such as anything under <code>/_matrix/client</code> for example). It is strongly
|
||||
recommended that modules register their web resources under the <code>/_synapse/client</code>
|
||||
namespace.</p>
|
||||
<p>The provided resource is a Python class that implements Twisted's <a href="https://docs.twistedmatrix.com/en/stable/api/twisted.web.resource.IResource.html">IResource</a>
|
||||
interface (such as <a href="https://docs.twistedmatrix.com/en/stable/api/twisted.web.resource.Resource.html">Resource</a>).</p>
|
||||
<p>Only one resource can be registered for a given path. If several modules attempt to
|
||||
register a resource for the same path, the module that appears first in Synapse's
|
||||
configuration file takes priority.</p>
|
||||
<p>Modules <strong>must</strong> register their web resources in their <code>__init__</code> method.</p>
|
||||
<h2 id="registering-a-callback"><a class="header" href="#registering-a-callback">Registering a callback</a></h2>
|
||||
<p>Modules can use Synapse's module API to register callbacks. Callbacks are functions that
|
||||
Synapse will call when performing specific actions. Callbacks must be asynchronous (unless
|
||||
specified otherwise), and are split in categories. A single module may implement callbacks
|
||||
from multiple categories, and is under no obligation to implement all callbacks from the
|
||||
categories it registers callbacks for.</p>
|
||||
<p>Modules can register callbacks using one of the module API's <code>register_[...]_callbacks</code>
|
||||
methods. The callback functions are passed to these methods as keyword arguments, with
|
||||
the callback name as the argument name and the function as its value. A
|
||||
<code>register_[...]_callbacks</code> method exists for each category.</p>
|
||||
<p>Callbacks for each category can be found on their respective page of the
|
||||
<a href="https://matrix-org.github.io/synapse">Synapse documentation website</a>.</p>
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