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develop/modules/spam_checker_callbacks.html
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@@ -153,21 +153,28 @@ Synapse instances. Spam checker callbacks can be registered using the module API
<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>
<pre><code class="language-python">async def check_event_for_spam(event: &quot;synapse.events.EventBase&quot;) -&gt; Union[bool, str]
<p><em>First introduced in Synapse v1.37.0</em>
<em>Signature extended to support Allow and Code in Synapse v1.60.0</em>
<em>Boolean and string return value types deprecated in Synapse v1.60.0</em></p>
<pre><code class="language-python">async def check_event_for_spam(event: &quot;synapse.module_api.EventBase&quot;) -&gt; Union[&quot;synapse.module_api.ALLOW&quot;, &quot;synapse.module_api.error.Codes&quot;, str, bool]
</code></pre>
<p>Called when receiving an event from a client or via federation. The callback must return
either:</p>
<p>Called when receiving an event from a client or via federation. The callback must return either:</p>
<ul>
<li>an error message string, to indicate the event must be rejected because of spam and
give a rejection reason to forward to clients;</li>
<li>the boolean <code>True</code>, to indicate that the event is spammy, but not provide further details; or</li>
<li>the booelan <code>False</code>, to indicate that the event is not considered spammy.</li>
<li><code>synapse.module_api.ALLOW</code>, to allow the operation. Other callbacks
may still decide to reject it.</li>
<li><code>synapse.api.Codes</code> to reject the operation with an error code. In case
of doubt, <code>synapse.api.error.Codes.FORBIDDEN</code> is a good error code.</li>
<li>(deprecated) a <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) on <code>False</code>, behave as <code>ALLOW</code>. Deprecated as confusing, as some
callbacks in expect <code>True</code> to allow and others <code>True</code> to reject.</li>
<li>(deprecated) on <code>True</code>, behave as <code>synapse.api.error.Codes.FORBIDDEN</code>. Deprecated as confusing, as
some callbacks in expect <code>True</code> to allow and others <code>True</code> to reject.</li>
</ul>
<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>
callback returns <code>synapse.module_api.ALLOW</code>, Synapse falls through to the next one. The value of the
first callback that does not return <code>synapse.module_api.ALLOW</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>
<pre><code class="language-python">async def user_may_join_room(user: str, room: str, is_invited: bool) -&gt; bool
develop/print.html
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@@ -1694,6 +1694,27 @@ COMMIT;
<p><a href="https://github.com/matrix-org/synapse/issues/11779#issuecomment-1131545970">This comment on issue 11779</a>
has queries that can be used to check a database for this problem in advance.</p>
</details>
<h2 id="spamchecker-apis-check_event_for_spam-has-a-new-signature"><a class="header" href="#spamchecker-apis-check_event_for_spam-has-a-new-signature">SpamChecker API's <code>check_event_for_spam</code> has a new signature.</a></h2>
<p>The previous signature has been deprecated.</p>
<p>Whereas <code>check_event_for_spam</code> callbacks used to return <code>Union[str, bool]</code>, they should now return <code>Union[&quot;synapse.module_api.Allow&quot;, &quot;synapse.module_api.errors.Codes&quot;]</code>.</p>
<p>This is part of an ongoing refactoring of the SpamChecker API to make it less ambiguous and more powerful.</p>
<p>If your module implements <code>check_event_for_spam</code> as follows:</p>
<pre><code class="language-python">async def check_event_for_spam(event):
if ...:
# Event is spam
return True
# Event is not spam
return False
</code></pre>
<p>you should rewrite it as follows:</p>
<pre><code class="language-python">async def check_event_for_spam(event):
if ...:
# Event is spam, mark it as forbidden (you may use some more precise error
# code if it is useful).
return synapse.module_api.errors.Codes.FORBIDDEN
# Event is not spam, mark it as `ALLOW`.
return synapse.module_api.ALLOW
</code></pre>
<h1 id="upgrading-to-v1590"><a class="header" href="#upgrading-to-v1590">Upgrading to v1.59.0</a></h1>
<h2 id="device-name-lookup-over-federation-has-been-disabled-by-default"><a class="header" href="#device-name-lookup-over-federation-has-been-disabled-by-default">Device name lookup over federation has been disabled by default</a></h2>
<p>The names of user devices are no longer visible to users on other homeservers by default.
@@ -11203,21 +11224,28 @@ Synapse instances. Spam checker callbacks can be registered using the module API
<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>
<pre><code class="language-python">async def check_event_for_spam(event: &quot;synapse.events.EventBase&quot;) -&gt; Union[bool, str]
<p><em>First introduced in Synapse v1.37.0</em>
<em>Signature extended to support Allow and Code in Synapse v1.60.0</em>
<em>Boolean and string return value types deprecated in Synapse v1.60.0</em></p>
<pre><code class="language-python">async def check_event_for_spam(event: &quot;synapse.module_api.EventBase&quot;) -&gt; Union[&quot;synapse.module_api.ALLOW&quot;, &quot;synapse.module_api.error.Codes&quot;, str, bool]
</code></pre>
<p>Called when receiving an event from a client or via federation. The callback must return
either:</p>
<p>Called when receiving an event from a client or via federation. The callback must return either:</p>
<ul>
<li>an error message string, to indicate the event must be rejected because of spam and
give a rejection reason to forward to clients;</li>
<li>the boolean <code>True</code>, to indicate that the event is spammy, but not provide further details; or</li>
<li>the booelan <code>False</code>, to indicate that the event is not considered spammy.</li>
<li><code>synapse.module_api.ALLOW</code>, to allow the operation. Other callbacks
may still decide to reject it.</li>
<li><code>synapse.api.Codes</code> to reject the operation with an error code. In case
of doubt, <code>synapse.api.error.Codes.FORBIDDEN</code> is a good error code.</li>
<li>(deprecated) a <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) on <code>False</code>, behave as <code>ALLOW</code>. Deprecated as confusing, as some
callbacks in expect <code>True</code> to allow and others <code>True</code> to reject.</li>
<li>(deprecated) on <code>True</code>, behave as <code>synapse.api.error.Codes.FORBIDDEN</code>. Deprecated as confusing, as
some callbacks in expect <code>True</code> to allow and others <code>True</code> to reject.</li>
</ul>
<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>
callback returns <code>synapse.module_api.ALLOW</code>, Synapse falls through to the next one. The value of the
first callback that does not return <code>synapse.module_api.ALLOW</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>
<pre><code class="language-python">async def user_may_join_room(user: str, room: str, is_invited: bool) -&gt; bool
develop/searchindex.js
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develop/searchindex.json
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develop/upgrade.html
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@@ -295,6 +295,27 @@ COMMIT;
<p><a href="https://github.com/matrix-org/synapse/issues/11779#issuecomment-1131545970">This comment on issue 11779</a>
has queries that can be used to check a database for this problem in advance.</p>
</details>
<h2 id="spamchecker-apis-check_event_for_spam-has-a-new-signature"><a class="header" href="#spamchecker-apis-check_event_for_spam-has-a-new-signature">SpamChecker API's <code>check_event_for_spam</code> has a new signature.</a></h2>
<p>The previous signature has been deprecated.</p>
<p>Whereas <code>check_event_for_spam</code> callbacks used to return <code>Union[str, bool]</code>, they should now return <code>Union[&quot;synapse.module_api.Allow&quot;, &quot;synapse.module_api.errors.Codes&quot;]</code>.</p>
<p>This is part of an ongoing refactoring of the SpamChecker API to make it less ambiguous and more powerful.</p>
<p>If your module implements <code>check_event_for_spam</code> as follows:</p>
<pre><code class="language-python">async def check_event_for_spam(event):
if ...:
# Event is spam
return True
# Event is not spam
return False
</code></pre>
<p>you should rewrite it as follows:</p>
<pre><code class="language-python">async def check_event_for_spam(event):
if ...:
# Event is spam, mark it as forbidden (you may use some more precise error
# code if it is useful).
return synapse.module_api.errors.Codes.FORBIDDEN
# Event is not spam, mark it as `ALLOW`.
return synapse.module_api.ALLOW
</code></pre>
<h1 id="upgrading-to-v1590"><a class="header" href="#upgrading-to-v1590">Upgrading to v1.59.0</a></h1>
<h2 id="device-name-lookup-over-federation-has-been-disabled-by-default"><a class="header" href="#device-name-lookup-over-federation-has-been-disabled-by-default">Device name lookup over federation has been disabled by default</a></h2>
<p>The names of user devices are no longer visible to users on other homeservers by default.