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| author | erikjohnston <erikjohnston@users.noreply.github.com> | 2023-10-31 13:48:18 +0000 |
|---|---|---|
| committer | erikjohnston <erikjohnston@users.noreply.github.com> | 2023-10-31 13:48:18 +0000 |
| commit | f97bb735b56f812d2808391d5e1e53cd3f560c28 (patch) | |
| tree | a337fc5dd27195ccaa570fd1b11fc119b799f461 /v1.96/modules | |
| parent | deploy: c02406ac711095eedbeeff229af8e368f77196aa (diff) | |
| download | synapse-f97bb735b56f812d2808391d5e1e53cd3f560c28.tar.xz | |
deploy: 4724a6ded136c727bcff5082b94c2b3d6355e908
Diffstat (limited to 'v1.96/modules')
| -rw-r--r-- | v1.96/modules/account_data_callbacks.html | 280 | ||||
| -rw-r--r-- | v1.96/modules/account_validity_callbacks.html | 218 | ||||
| -rw-r--r-- | v1.96/modules/add_extra_fields_to_client_events_unsigned.html | 210 | ||||
| -rw-r--r-- | v1.96/modules/background_update_controller_callbacks.html | 236 | ||||
| -rw-r--r-- | v1.96/modules/index.html | 231 | ||||
| -rw-r--r-- | v1.96/modules/password_auth_provider_callbacks.html | 428 | ||||
| -rw-r--r-- | v1.96/modules/porting_legacy_module.html | 206 | ||||
| -rw-r--r-- | v1.96/modules/presence_router_callbacks.html | 277 | ||||
| -rw-r--r-- | v1.96/modules/spam_checker_callbacks.html | 568 | ||||
| -rw-r--r-- | v1.96/modules/third_party_rules_callbacks.html | 437 | ||||
| -rw-r--r-- | v1.96/modules/writing_a_module.html | 298 |
11 files changed, 3389 insertions, 0 deletions
diff --git a/v1.96/modules/account_data_callbacks.html b/v1.96/modules/account_data_callbacks.html new file mode 100644 index 0000000000..9004174bb1 --- /dev/null +++ b/v1.96/modules/account_data_callbacks.html @@ -0,0 +1,280 @@ +<!DOCTYPE HTML> +<html lang="en" class="sidebar-visible no-js light"> + <head> + <!-- Book generated using mdBook --> + <meta charset="UTF-8"> + <title>Account data 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/account_data_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="account-data-callbacks"><a class="header" href="#account-data-callbacks">Account data callbacks</a></h1> +<p>Account data callbacks allow module developers to react to changes of the account data +of local users. Account data callbacks can be registered using the module API's +<code>register_account_data_callbacks</code> method.</p> +<h2 id="callbacks"><a class="header" href="#callbacks">Callbacks</a></h2> +<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> +<pre><code class="language-python">async def on_account_data_updated( + user_id: str, + room_id: Optional[str], + account_data_type: str, + content: "synapse.module_api.JsonDict", +) -> None: +</code></pre> +<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 +import attr +from typing import Any, Dict, Optional + +from synapse.module_api import JsonDict, ModuleApi +from synapse.module_api.errors import ConfigError + + +@attr.s(auto_attribs=True) +class CustomAccountDataConfig: + audit_room: str + sender: str + + +class CustomAccountDataModule: + def __init__(self, config: CustomAccountDataConfig, api: ModuleApi): + self.api = api + self.config = config + + self.api.register_account_data_callbacks( + on_account_data_updated=self.log_new_account_data, + ) + + @staticmethod + 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") + check_in_config("sender") + + return CustomAccountDataConfig( + audit_room=config["audit_room"], + sender=config["sender"], + ) + + async def log_new_account_data( + self, + user_id: str, + room_id: Optional[str], + account_data_type: str, + content: JsonDict, + ) -> None: + content_raw = json.dumps(content) + msg_content = f"{user_id} has changed their account data for type {account_data_type} to: {content_raw}" + + if room_id is not None: + msg_content += f" (in room {room_id})" + + 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 + } + } + ) +</code></pre> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../modules/background_update_controller_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/add_extra_fields_to_client_events_unsigned.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/background_update_controller_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/add_extra_fields_to_client_events_unsigned.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; 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Account validity callbacks can be registered using the module API's +<code>register_account_validity_callbacks</code> method.</p> +<p>The available account validity callbacks are:</p> +<h3 id="is_user_expired"><a class="header" href="#is_user_expired"><code>is_user_expired</code></a></h3> +<p><em>First introduced in Synapse v1.39.0</em></p> +<pre><code class="language-python">async def is_user_expired(user: str) -> Optional[bool] +</code></pre> +<p>Called when processing any authenticated request (except for logout requests). The module +can return a <code>bool</code> to indicate whether the user has expired and should be locked out of +their account, or <code>None</code> if the module wasn't able to figure it out. The user is +represented by their Matrix user ID (e.g. <code>@alice:example.com</code>).</p> +<p>If the module returns <code>True</code>, the current request will be denied with the error code +<code>ORG_MATRIX_EXPIRED_ACCOUNT</code> and the HTTP status code 403. Note that this doesn't +invalidate the user's access token.</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.</p> +<h3 id="on_user_registration"><a class="header" href="#on_user_registration"><code>on_user_registration</code></a></h3> +<p><em>First introduced in Synapse v1.39.0</em></p> +<pre><code class="language-python">async def on_user_registration(user: str) -> None +</code></pre> +<p>Called after successfully registering a user, in case the module needs to perform extra +operations to keep track of them. (e.g. add them to a database table). The user is +represented by their Matrix user ID.</p> +<p>If multiple modules implement this callback, Synapse runs them all in order.</p> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../modules/presence_router_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/password_auth_provider_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/presence_router_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/password_auth_provider_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 diff --git a/v1.96/modules/add_extra_fields_to_client_events_unsigned.html b/v1.96/modules/add_extra_fields_to_client_events_unsigned.html new file mode 100644 index 0000000000..b23940d4bd --- /dev/null +++ b/v1.96/modules/add_extra_fields_to_client_events_unsigned.html @@ -0,0 +1,210 @@ +<!DOCTYPE HTML> +<html lang="en" class="sidebar-visible no-js light"> + <head> + <!-- Book generated using mdBook --> + <meta charset="UTF-8"> + <title>Add extra fields to client events unsigned section 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/add_extra_fields_to_client_events_unsigned.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'); 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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/background_update_controller_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="background-update-controller-callbacks"><a class="header" href="#background-update-controller-callbacks">Background update controller callbacks</a></h1> +<p>Background update controller callbacks allow module developers to control (e.g. rate-limit) +how database background updates are run. A database background update is an operation +Synapse runs on its database in the background after it starts. It's usually used to run +database operations that would take too long if they were run at the same time as schema +updates (which are run on startup) and delay Synapse's startup too much: populating a +table with a big amount of data, adding an index on a big table, deleting superfluous data, +etc.</p> +<p>Background update controller callbacks can be registered using the module API's +<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 +update will happen in one go and may take a long time (e.g. creating indices). If this last +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> +<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 +of the database. The module must return the number of elements to process in this first +iteration.</p> +<p>If this callback is not defined, Synapse will use a default value of 100.</p> +<h3 id="min_batch_size"><a class="header" href="#min_batch_size"><code>min_batch_size</code></a></h3> +<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 +of the database. The module must return an integer representing the minimum number of +elements to process in this iteration. This number must be at least 1, and is used to +ensure that progress is always made.</p> +<p>If this callback is not defined, Synapse will use a default value of 100.</p> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../modules/password_auth_provider_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/account_data_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/password_auth_provider_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/account_data_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 diff --git a/v1.96/modules/index.html b/v1.96/modules/index.html new file mode 100644 index 0000000000..d56942176c --- /dev/null +++ b/v1.96/modules/index.html @@ -0,0 +1,231 @@ +<!DOCTYPE HTML> +<html lang="en" class="sidebar-visible no-js light"> + <head> + <!-- Book generated using mdBook --> + <meta charset="UTF-8"> + <title>Pluggable Modules - 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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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 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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">Account data callbacks</a></li><li class="chapter-item expanded "><a href="../modules/add_extra_fields_to_client_events_unsigned.html">Add extra fields to client events unsigned section callbacks</a></li><li class="chapter-item expanded "><a href="../modules/porting_legacy_module.html">Porting a legacy module to the new interface</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../workers.html">Workers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../synctl_workers.html">Using 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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/index.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="modules"><a class="header" href="#modules">Modules</a></h1> +<p>Synapse supports extending its functionality by configuring external modules.</p> +<p><strong>Note</strong>: When using third-party modules, you effectively allow someone else to run +custom code on your Synapse homeserver. Server admins are encouraged to verify the +provenance of the modules they use on their homeserver and make sure the modules aren't +running malicious code on their instance.</p> +<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 +information for a given module should be available in the module's own documentation.</p> +<h2 id="using-multiple-modules"><a class="header" href="#using-multiple-modules">Using multiple modules</a></h2> +<p>The order in which modules are listed in this section is important. When processing an +action that can be handled by several modules, Synapse will always prioritise the module +that appears first (i.e. is the highest in the list). This means:</p> +<ul> +<li>If several modules register the same callback, the callback registered by the module +that appears first is used.</li> +<li>If several modules try to register a handler for the same HTTP path, only the handler +registered by the module that appears first is used. Handlers registered by the other +module(s) are ignored and Synapse will log a warning message about them.</li> +</ul> +<p>Note that Synapse doesn't allow multiple modules implementing authentication checkers via +the password auth provider feature for the same login type with different fields. If this +happens, Synapse will refuse to start.</p> +<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 +interfaces might be compatible with it, others still require configuring modules in +another part of Synapse's configuration file.</p> +<p>Currently, only the following pre-existing interfaces are compatible with this new system:</p> +<ul> +<li>spam checker</li> +<li>third-party rules</li> +<li>presence router</li> +<li>password auth providers</li> +</ul> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../message_retention_policies.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/writing_a_module.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="../message_retention_policies.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/writing_a_module.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 diff --git a/v1.96/modules/password_auth_provider_callbacks.html b/v1.96/modules/password_auth_provider_callbacks.html new file mode 100644 index 0000000000..941dc90d12 --- /dev/null +++ b/v1.96/modules/password_auth_provider_callbacks.html @@ -0,0 +1,428 @@ +<!DOCTYPE HTML> +<html lang="en" class="sidebar-visible no-js light"> + <head> + <!-- Book generated using mdBook --> + <meta charset="UTF-8"> + <title>Password auth provider 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/password_auth_provider_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="password-auth-provider-callbacks"><a class="header" href="#password-auth-provider-callbacks">Password auth provider callbacks</a></h1> +<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> +<h2 id="callbacks"><a class="header" href="#callbacks">Callbacks</a></h2> +<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>Note that the user is not automatically registered, the <code>register_user(..)</code> method of +the <a href="writing_a_module.html">module API</a> can be used to lazily create users.</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>Deleting the related pushers is done after calling <code>on_logged_out</code>, so you can rely on them +to still be present.</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> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../modules/account_validity_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/background_update_controller_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/account_validity_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/background_update_controller_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; 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Any +changes to the database should now be made by the module using the module API class.</p> +<p>The module's author should also update any example in the module's configuration to only +use the new <code>modules</code> section in Synapse's configuration file (see <a href="index.html#using-modules">this section</a> +for more info).</p> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../modules/add_extra_fields_to_client_events_unsigned.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="../workers.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/add_extra_fields_to_client_events_unsigned.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="../workers.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 diff --git a/v1.96/modules/presence_router_callbacks.html b/v1.96/modules/presence_router_callbacks.html new file mode 100644 index 0000000000..1574797c03 --- /dev/null +++ b/v1.96/modules/presence_router_callbacks.html @@ -0,0 +1,277 @@ +<!DOCTYPE HTML> +<html lang="en" class="sidebar-visible no-js light"> + <head> + <!-- Book generated using mdBook --> + <meta charset="UTF-8"> + <title>Presence router 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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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 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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 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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">Account data callbacks</a></li><li class="chapter-item expanded "><a href="../modules/add_extra_fields_to_client_events_unsigned.html">Add extra fields to client events unsigned section callbacks</a></li><li class="chapter-item expanded "><a href="../modules/porting_legacy_module.html">Porting a legacy module to the new interface</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="../workers.html">Workers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../synctl_workers.html">Using 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Tools</a></li><li class="chapter-item expanded "><a href="../usage/administration/state_groups.html">State Groups</a></li><li class="chapter-item expanded "><a href="../usage/administration/request_log.html">Request log format</a></li><li class="chapter-item expanded "><a href="../usage/administration/admin_faq.html">Admin FAQ</a></li><li class="chapter-item expanded "><div>Scripts</div></li></ol></li><li class="chapter-item expanded "><li class="part-title">Development</li><li class="chapter-item expanded "><a href="../development/contributing_guide.html">Contributing Guide</a></li><li class="chapter-item expanded "><a href="../code_style.html">Code Style</a></li><li class="chapter-item expanded "><a href="../development/reviews.html">Reviewing Code</a></li><li class="chapter-item expanded "><a href="../development/releases.html">Release Cycle</a></li><li class="chapter-item expanded "><a href="../development/git.html">Git Usage</a></li><li class="chapter-item expanded 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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/presence_router_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="presence-router-callbacks"><a class="header" href="#presence-router-callbacks">Presence router callbacks</a></h1> +<p>Presence router callbacks allow module developers to define additional users +which receive presence updates from local users. The additional users +can be local or remote.</p> +<p>For example, it could be used to direct all of <code>@alice:example.com</code> (a local user)'s +presence updates to <code>@bob:matrix.org</code> (a remote user), even though they don't share a +room. (Note that those presence updates might not make it to <code>@bob:matrix.org</code>'s client +unless a similar presence router is running on that homeserver.)</p> +<p>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> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../modules/third_party_rules_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/account_validity_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/third_party_rules_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/account_validity_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; 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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> +<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.media.media_storage.ReadableFileWrapper", + file_info: "synapse.media._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> +<h3 id="check_login_for_spam"><a class="header" href="#check_login_for_spam"><code>check_login_for_spam</code></a></h3> +<p><em>First introduced in Synapse v1.87.0</em></p> +<pre><code class="language-python">async def check_login_for_spam( + user_id: str, + device_id: Optional[str], + initial_display_name: Optional[str], + request_info: Collection[Tuple[Optional[str], str]], + auth_provider_id: Optional[str] = None, +) -> Union["synapse.module_api.NOT_SPAM", "synapse.module_api.errors.Codes"] +</code></pre> +<p>Called when a user logs in.</p> +<p>The arguments passed to this callback are:</p> +<ul> +<li><code>user_id</code>: The user ID the user is logging in with</li> +<li><code>device_id</code>: The device ID the user is re-logging into.</li> +<li><code>initial_display_name</code>: The device display name, if any.</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 login 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>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> +<p><em>Note:</em> This will not be called when a user registers.</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> + + </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; 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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>For any given event, this callback will be called on every worker process, even if that worker will not end up +acting on that event. This callback will not be called for events that are marked as rejected.</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> +<p><strong><span style="color:red"> +This callback is deprecated in favour of the <code>on_add_user_third_party_identifier</code> callback, which +features the same functionality. The only difference is in name. +</span></strong></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> +<h3 id="on_add_user_third_party_identifier"><a class="header" href="#on_add_user_third_party_identifier"><code>on_add_user_third_party_identifier</code></a></h3> +<p><em>First introduced in Synapse v1.79.0</em></p> +<pre><code class="language-python">async def on_add_user_third_party_identifier(user_id: str, medium: str, address: str) -> None: +</code></pre> +<p>Called after successfully creating an association between a 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 (i.e. an email address).</p> +<p>Note that this callback is <em>not</em> called if a user attempts to bind their third-party identifier +to an identity server (via a call to <a href="https://spec.matrix.org/v1.5/client-server-api/#post_matrixclientv3account3pidbind"><code>POST /_matrix/client/v3/account/3pid/bind</code></a>).</p> +<p>If multiple modules implement this callback, Synapse runs them all in order.</p> +<h3 id="on_remove_user_third_party_identifier"><a class="header" href="#on_remove_user_third_party_identifier"><code>on_remove_user_third_party_identifier</code></a></h3> +<p><em>First introduced in Synapse v1.79.0</em></p> +<pre><code class="language-python">async def on_remove_user_third_party_identifier(user_id: str, medium: str, address: str) -> None: +</code></pre> +<p>Called after successfully removing an association between a 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 (i.e. an email address).</p> +<p>Note that this callback is <em>not</em> called if a user attempts to unbind their third-party +identifier from an identity server (via a call to <a href="https://spec.matrix.org/v1.5/client-server-api/#post_matrixclientv3account3pidunbind"><code>POST /_matrix/client/v3/account/3pid/unbind</code></a>).</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; 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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/writing_a_module.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="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 +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> +<p>When instantiated, a module is given its parsed configuration as well as an instance of +the <code>synapse.module_api.ModuleApi</code> class. The configuration is a dictionary, and is +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> +<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> +<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> +<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> +<h2 id="caching"><a class="header" href="#caching">Caching</a></h2> +<p><em>Added in Synapse 1.74.0.</em></p> +<p>Modules can leverage Synapse's caching tools to manage their own cached functions. This +can be helpful for modules that need to repeatedly request the same data from the database +or a remote service.</p> +<p>Functions that need to be wrapped with a cache need to be decorated with a <code>@cached()</code> +decorator (which can be imported from <code>synapse.module_api</code>) and registered with the +<a href="https://github.com/matrix-org/synapse/blob/release-v1.77/synapse/module_api/__init__.py#L888"><code>ModuleApi.register_cached_function</code></a> +API when initialising the module. If the module needs to invalidate an entry in a cache, +it needs to use the <a href="https://github.com/matrix-org/synapse/blob/release-v1.77/synapse/module_api/__init__.py#L904"><code>ModuleApi.invalidate_cache</code></a> +API, with the function to invalidate the cache of and the key(s) of the entry to +invalidate.</p> +<p>Below is an example of a simple module using a cached function:</p> +<pre><code class="language-python">from typing import Any +from synapse.module_api import cached, ModuleApi + +class MyModule: + def __init__(self, config: Any, api: ModuleApi): + self.api = api + + # Register the cached function so Synapse knows how to correctly invalidate + # entries for it. + self.api.register_cached_function(self.get_user_from_id) + + @cached() + async def get_department_for_user(self, user_id: str) -> str: + """A function with a cache.""" + # Request a department from an external service. + return await self.http_client.get_json( + "https://int.example.com/users", {"user_id": user_id) + )["department"] + + async def do_something_with_users(self) -> None: + """Calls the cached function and then invalidates an entry in its cache.""" + + user_id = "@alice:example.com" + + # Get the user. Since get_department_for_user is wrapped with a cache, + # the return value for this user_id will be cached. + department = await self.get_department_for_user(user_id) + + # Do something with `department`... + + # Let's say something has changed with our user, and the entry we have for + # them in the cache is out of date, so we want to invalidate it. + await self.api.invalidate_cache(self.get_department_for_user, (user_id,)) +</code></pre> +<p>See the <a href="https://github.com/matrix-org/synapse/blob/release-v1.77/synapse/module_api/__init__.py#L190"><code>cached</code> docstring</a> for more details.</p> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../modules/index.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/spam_checker_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/index.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/spam_checker_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 |