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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/spam_checker_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="spam-checker-callbacks"><a class="header" href="#spam-checker-callbacks">Spam checker callbacks</a></h1> -<p>Spam checker callbacks allow module developers to implement spam mitigation actions for -Synapse instances. Spam checker callbacks can be registered using the module API's -<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> -<pre><code class="language-python">async def check_event_for_spam(event: &quot;synapse.events.EventBase&quot;) -&gt; Union[bool, str] -</code></pre> -<p>Called when receiving an event from a client or via federation. The module can return -either a <code>bool</code> to indicate whether the event must be rejected because of spam, or a <code>str</code> -to indicate the event must be rejected because of spam and to give a rejection reason to -forward to clients.</p> -<h3 id="user_may_join_room"><a class="header" href="#user_may_join_room"><code>user_may_join_room</code></a></h3> -<pre><code class="language-python">async def user_may_join_room(user: str, room: str, is_invited: bool) -&gt; bool -</code></pre> -<p>Called when a user is trying to join a room. The module must return a <code>bool</code> to indicate -whether the user can join the 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> -<h3 id="user_may_invite"><a class="header" href="#user_may_invite"><code>user_may_invite</code></a></h3> -<pre><code class="language-python">async def user_may_invite(inviter: str, invitee: str, room_id: str) -&gt; bool -</code></pre> -<p>Called when processing an invitation. The module must return a <code>bool</code> indicating whether -the inviter can invite the invitee to the given room. Both inviter and invitee are -represented by their Matrix user ID (e.g. <code>@alice:example.com</code>).</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> -<pre><code class="language-python">async def user_may_send_3pid_invite( - inviter: str, - medium: str, - address: str, - room_id: str, -) -&gt; 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). The module must return a <code>bool</code> indicating -whether the inviter can invite the invitee to the given room.</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. &quot;email&quot;) 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( - &quot;@bob:example.com&quot;, # The inviter's user ID - &quot;email&quot;, # The medium of the 3PID to invite - &quot;alice@example.com&quot;, # The address of the 3PID to invite - &quot;!some_room:example.com&quot;, # 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> -<h3 id="user_may_create_room"><a class="header" href="#user_may_create_room"><code>user_may_create_room</code></a></h3> -<pre><code class="language-python">async def user_may_create_room(user: str) -&gt; bool -</code></pre> -<p>Called when processing a room creation request. The module must return a <code>bool</code> indicating -whether the given user (represented by their Matrix user ID) is allowed to create a room.</p> -<h3 id="user_may_create_room_with_invites"><a class="header" href="#user_may_create_room_with_invites"><code>user_may_create_room_with_invites</code></a></h3> -<pre><code class="language-python">async def user_may_create_room_with_invites( - user: str, - invites: List[str], - threepid_invites: List[Dict[str, str]], -) -&gt; bool -</code></pre> -<p>Called when processing a room creation request (right after <code>user_may_create_room</code>). -The module is given the Matrix user ID of the user trying to create a room, as well as a -list of Matrix users to invite and a list of third-party identifiers (3PID, e.g. email -addresses) to invite.</p> -<p>An invited Matrix user to invite is represented by their Matrix user IDs, and an invited -3PIDs is represented by a dict that includes the 3PID medium (e.g. &quot;email&quot;) through its -<code>medium</code> key and its address (e.g. &quot;alice@example.com&quot;) through its <code>address</code> key.</p> -<p>See <a href="https://matrix.org/docs/spec/appendices#pid-types">the Matrix specification</a> for more -information regarding third-party identifiers.</p> -<p>If no invite and/or 3PID invite were specified in the room creation request, the -corresponding list(s) will be empty.</p> -<p><strong>Note</strong>: This callback is not called when a room is cloned (e.g. during a room upgrade) -since no invites are sent when cloning a room. To cover this case, modules also need to -implement <code>user_may_create_room</code>.</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> -<pre><code class="language-python">async def user_may_create_room_alias(user: str, room_alias: &quot;synapse.types.RoomAlias&quot;) -&gt; bool -</code></pre> -<p>Called when trying to associate an alias with an existing room. The module must return a -<code>bool</code> indicating whether the given user (represented by their Matrix user ID) is allowed -to set the given alias.</p> -<h3 id="user_may_publish_room"><a class="header" href="#user_may_publish_room"><code>user_may_publish_room</code></a></h3> -<pre><code class="language-python">async def user_may_publish_room(user: str, room_id: str) -&gt; bool -</code></pre> -<p>Called when trying to publish a room to the homeserver's public rooms directory. The -module must return a <code>bool</code> indicating whether the given user (represented by their -Matrix user ID) is allowed to publish the given room.</p> -<h3 id="check_username_for_spam"><a class="header" href="#check_username_for_spam"><code>check_username_for_spam</code></a></h3> -<pre><code class="language-python">async def check_username_for_spam(user_profile: Dict[str, str]) -&gt; 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 profile can appear in search results. The profile -is represented as a dictionary with the following keys:</p> -<ul> -<li><code>user_id</code>: The Matrix ID for this user.</li> -<li><code>display_name</code>: The user's display name.</li> -<li><code>avatar_url</code>: The <code>mxc://</code> URL to the user's 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> -<h3 id="check_registration_for_spam"><a class="header" href="#check_registration_for_spam"><code>check_registration_for_spam</code></a></h3> -<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, -) -&gt; &quot;synapse.spam_checker_api.RegistrationBehaviour&quot; -</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> -<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> -<pre><code class="language-python">async def check_media_file_for_spam( - file_wrapper: &quot;synapse.rest.media.v1.media_storage.ReadableFileWrapper&quot;, - file_info: &quot;synapse.rest.media.v1._base.FileInfo&quot;, -) -&gt; bool -</code></pre> -<p>Called when storing a local or remote file. The module must return a boolean indicating -whether the given file can be stored in the homeserver's media store.</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(&quot;evil_users&quot;) or [] - - def render_GET(self, request: Request): - user = request.args.get(b&quot;user&quot;)[0].decode() - request.setHeader(b&quot;Content-Type&quot;, b&quot;application/json&quot;) - return json.dumps({&quot;evil&quot;: user in self.evil_users}).encode() - - -class ListSpamChecker: - def __init__(self, config: dict, api: ModuleApi): - self.api = api - self.evil_users = config.get(&quot;evil_users&quot;) or [] - - self.api.register_spam_checker_callbacks( - check_event_for_spam=self.check_event_for_spam, - ) - - self.api.register_web_resource( - path=&quot;/_synapse/client/list_spam_checker/is_evil&quot;, - resource=IsUserEvilResource(config), - ) - - async def check_event_for_spam(self, event: &quot;synapse.events.EventBase&quot;) -&gt; Union[bool, str]: - return event.sender not in self.evil_users -</code></pre> - - </main> - - <nav class="nav-wrapper" aria-label="Page navigation"> - <!-- Mobile navigation buttons --> - - <a rel="prev" href="../modules/writing_a_module.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/third_party_rules_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/writing_a_module.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/third_party_rules_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