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diff --git a/v1.76/modules/third_party_rules_callbacks.html b/v1.76/modules/third_party_rules_callbacks.html new file mode 100644 index 0000000000..b8f0a9fcda --- /dev/null +++ b/v1.76/modules/third_party_rules_callbacks.html @@ -0,0 +1,409 @@ +<!DOCTYPE HTML> +<html lang="en" class="sidebar-visible no-js light"> + <head> + <!-- Book generated using mdBook --> + <meta charset="UTF-8"> + <title>Third-party rules callbacks - Synapse</title> + <!-- Custom HTML head --> + <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> + <meta name="description" content=""> + <meta name="viewport" content="width=device-width, initial-scale=1"> + <meta name="theme-color" content="#ffffff" /> + + <link rel="icon" href="../favicon.svg"> + <link rel="shortcut icon" href="../favicon.png"> + <link rel="stylesheet" href="../css/variables.css"> + <link rel="stylesheet" href="../css/general.css"> + <link rel="stylesheet" href="../css/chrome.css"> + <link rel="stylesheet" href="../css/print.css" media="print"> + <!-- Fonts --> + <link rel="stylesheet" href="../FontAwesome/css/font-awesome.css"> + <link rel="stylesheet" href="../fonts/fonts.css"> + <!-- Highlight.js Stylesheets --> + <link rel="stylesheet" href="../highlight.css"> + <link rel="stylesheet" href="../tomorrow-night.css"> + <link rel="stylesheet" href="../ayu-highlight.css"> + + <!-- Custom theme stylesheets --> + <link rel="stylesheet" href="../docs/website_files/table-of-contents.css"> + <link rel="stylesheet" href="../docs/website_files/remove-nav-buttons.css"> + <link rel="stylesheet" href="../docs/website_files/indent-section-headers.css"> + </head> + <body> + <!-- Provide site root to javascript --> + <script type="text/javascript"> + var path_to_root = "../"; + var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? 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(Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar"> + <i class="fa fa-search"></i> + </button> + </div> + + <h1 class="menu-title">Synapse</h1> + + <div class="right-buttons"> + <a href="../print.html" title="Print this book" aria-label="Print this book"> + <i id="print-button" class="fa fa-print"></i> + </a> + <a href="https://github.com/matrix-org/synapse" title="Git repository" aria-label="Git repository"> + <i id="git-repository-button" class="fa fa-github"></i> + </a> + <a href="https://github.com/matrix-org/synapse/edit/develop/docs/modules/third_party_rules_callbacks.md" title="Suggest an edit" aria-label="Suggest an edit"> + <i id="git-edit-button" class="fa fa-edit"></i> + </a> + </div> + </div> + + <div id="search-wrapper" class="hidden"> + <form id="searchbar-outer" class="searchbar-outer"> + <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header"> + </form> + <div id="searchresults-outer" class="searchresults-outer hidden"> + <div id="searchresults-header" class="searchresults-header"></div> + <ul id="searchresults"> + </ul> + </div> + </div> + <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM --> + <script type="text/javascript"> + document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible'); + document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible'); + Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) { + link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1); + }); + </script> + + <div id="content" class="content"> + <main> + <!-- Page table of contents --> + <div class="sidetoc"> + <nav class="pagetoc"></nav> + </div> + + <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> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../modules/spam_checker_callbacks.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> + <i class="fa fa-angle-left"></i> + </a> + <a rel="next" href="../modules/presence_router_callbacks.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> + <i class="fa fa-angle-right"></i> + </a> + <div style="clear: both"></div> + </nav> + </div> + </div> + + <nav class="nav-wide-wrapper" aria-label="Page navigation"> + <a rel="prev" href="../modules/spam_checker_callbacks.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> + <i class="fa fa-angle-left"></i> + </a> + <a rel="next" href="../modules/presence_router_callbacks.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> + <i class="fa fa-angle-right"></i> + </a> + </nav> + + </div> + + <script type="text/javascript"> + window.playground_copyable = true; + </script> + <script src="../elasticlunr.min.js" type="text/javascript" charset="utf-8"></script> + <script src="../mark.min.js" type="text/javascript" charset="utf-8"></script> + <script src="../searcher.js" type="text/javascript" charset="utf-8"></script> + <script src="../clipboard.min.js" type="text/javascript" charset="utf-8"></script> + <script src="../highlight.js" type="text/javascript" charset="utf-8"></script> + <script src="../book.js" type="text/javascript" charset="utf-8"></script> + + <!-- Custom JS scripts --> + <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script> + </body> +</html> \ No newline at end of file |