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diff --git a/v1.94/user_directory.html b/v1.94/user_directory.html new file mode 100644 index 0000000000..df4d710ab0 --- /dev/null +++ b/v1.94/user_directory.html @@ -0,0 +1,319 @@ +<!DOCTYPE HTML> +<html lang="en" class="sidebar-visible no-js light"> + <head> + <!-- Book generated using mdBook --> + <meta charset="UTF-8"> + <title>User Directory - 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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</script> + + <!-- Hide / unhide sidebar before it is displayed --> + <script type="text/javascript"> + var html = document.querySelector('html'); + var sidebar = 'hidden'; + if (document.body.clientWidth >= 1080) { + try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { } + sidebar = sidebar || 'visible'; + } + html.classList.remove('sidebar-visible'); + html.classList.add("sidebar-" + sidebar); + </script> + + <nav id="sidebar" class="sidebar" aria-label="Table of contents"> + <div class="sidebar-scrollbox"> + <ol class="chapter"><li class="chapter-item expanded affix "><li class="part-title">Introduction</li><li class="chapter-item expanded "><a href="welcome_and_overview.html">Welcome and Overview</a></li><li class="chapter-item expanded affix "><li class="part-title">Setup</li><li class="chapter-item expanded "><a href="setup/installation.html">Installation</a></li><li class="chapter-item expanded "><a href="postgres.html">Using Postgres</a></li><li class="chapter-item expanded "><a href="reverse_proxy.html">Configuring a Reverse Proxy</a></li><li class="chapter-item expanded "><a href="setup/forward_proxy.html">Configuring a Forward/Outbound Proxy</a></li><li class="chapter-item expanded "><a href="turn-howto.html">Configuring a Turn Server</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="setup/turn/coturn.html">coturn TURN server</a></li><li class="chapter-item expanded "><a href="setup/turn/eturnal.html">eturnal TURN server</a></li></ol></li><li class="chapter-item expanded "><a href="delegate.html">Delegation</a></li><li class="chapter-item expanded affix "><li class="part-title">Upgrading</li><li class="chapter-item expanded "><a href="upgrade.html">Upgrading between Synapse Versions</a></li><li class="chapter-item expanded affix "><li class="part-title">Usage</li><li class="chapter-item expanded "><a href="federate.html">Federation</a></li><li class="chapter-item expanded "><a href="usage/configuration/index.html">Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="usage/configuration/config_documentation.html">Configuration Manual</a></li><li class="chapter-item expanded "><a href="usage/configuration/homeserver_sample_config.html">Homeserver Sample Config File</a></li><li class="chapter-item expanded "><a href="usage/configuration/logging_sample_config.html">Logging Sample Config File</a></li><li class="chapter-item expanded "><a href="structured_logging.html">Structured Logging</a></li><li class="chapter-item expanded "><a href="templates.html">Templates</a></li><li class="chapter-item expanded "><a href="usage/configuration/user_authentication/index.html">User Authentication</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="usage/configuration/user_authentication/single_sign_on/index.html">Single-Sign On</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="openid.html">OpenID Connect</a></li><li class="chapter-item expanded "><a href="usage/configuration/user_authentication/single_sign_on/saml.html">SAML</a></li><li class="chapter-item expanded "><a href="usage/configuration/user_authentication/single_sign_on/cas.html">CAS</a></li><li class="chapter-item expanded "><a href="sso_mapping_providers.html">SSO Mapping Providers</a></li></ol></li><li class="chapter-item expanded "><a href="password_auth_providers.html">Password Auth Providers</a></li><li class="chapter-item expanded "><a href="jwt.html">JSON Web Tokens</a></li><li class="chapter-item expanded "><a href="usage/configuration/user_authentication/refresh_tokens.html">Refresh Tokens</a></li></ol></li><li class="chapter-item expanded "><a href="CAPTCHA_SETUP.html">Registration Captcha</a></li><li class="chapter-item expanded "><a href="application_services.html">Application Services</a></li><li class="chapter-item expanded "><a href="server_notices.html">Server Notices</a></li><li class="chapter-item expanded "><a href="consent_tracking.html">Consent Tracking</a></li><li class="chapter-item expanded "><a href="user_directory.html" class="active">User Directory</a></li><li class="chapter-item expanded "><a href="message_retention_policies.html">Message Retention Policies</a></li><li class="chapter-item expanded "><a href="modules/index.html">Pluggable Modules</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="modules/writing_a_module.html">Writing a module</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="modules/spam_checker_callbacks.html">Spam checker callbacks</a></li><li class="chapter-item expanded "><a href="modules/third_party_rules_callbacks.html">Third-party rules callbacks</a></li><li class="chapter-item expanded "><a href="modules/presence_router_callbacks.html">Presence router callbacks</a></li><li class="chapter-item expanded "><a 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href="usage/administration/index.html">Administration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="usage/administration/admin_api/index.html">Admin API</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="admin_api/account_validity.html">Account Validity</a></li><li class="chapter-item expanded "><a href="usage/administration/admin_api/background_updates.html">Background Updates</a></li><li class="chapter-item expanded "><a href="admin_api/event_reports.html">Event Reports</a></li><li class="chapter-item expanded "><a href="admin_api/experimental_features.html">Experimental Features</a></li><li class="chapter-item expanded "><a href="admin_api/media_admin_api.html">Media</a></li><li class="chapter-item expanded "><a href="admin_api/purge_history_api.html">Purge History</a></li><li class="chapter-item expanded "><a href="admin_api/register_api.html">Register Users</a></li><li class="chapter-item expanded "><a href="usage/administration/admin_api/registration_tokens.html">Registration Tokens</a></li><li class="chapter-item expanded "><a href="admin_api/room_membership.html">Manipulate Room Membership</a></li><li class="chapter-item expanded "><a href="admin_api/rooms.html">Rooms</a></li><li class="chapter-item expanded "><a href="admin_api/server_notices.html">Server Notices</a></li><li class="chapter-item expanded "><a href="admin_api/statistics.html">Statistics</a></li><li class="chapter-item expanded "><a href="admin_api/user_admin_api.html">Users</a></li><li class="chapter-item expanded "><a href="admin_api/version_api.html">Server Version</a></li><li class="chapter-item expanded "><a href="usage/administration/admin_api/federation.html">Federation</a></li></ol></li><li class="chapter-item expanded "><a href="manhole.html">Manhole</a></li><li class="chapter-item expanded "><a href="metrics-howto.html">Monitoring</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="usage/administration/monitoring/reporting_homeserver_usage_statistics.html">Reporting Homeserver Usage Statistics</a></li></ol></li><li class="chapter-item expanded "><a href="usage/administration/monthly_active_users.html">Monthly Active Users</a></li><li class="chapter-item expanded "><a href="usage/administration/understanding_synapse_through_grafana_graphs.html">Understanding Synapse Through Grafana Graphs</a></li><li class="chapter-item expanded "><a href="usage/administration/useful_sql_for_admins.html">Useful SQL for Admins</a></li><li class="chapter-item expanded "><a href="usage/administration/database_maintenance_tools.html">Database Maintenance 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 "><div>Testing</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="development/demo.html">Demo scripts</a></li></ol></li><li class="chapter-item expanded "><a href="opentracing.html">OpenTracing</a></li><li class="chapter-item expanded "><a href="development/database_schema.html">Database Schemas</a></li><li class="chapter-item expanded "><a href="development/experimental_features.html">Experimental features</a></li><li class="chapter-item expanded "><a href="development/dependencies.html">Dependency management</a></li><li class="chapter-item expanded "><div>Synapse Architecture</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="development/synapse_architecture/cancellation.html">Cancellation</a></li><li class="chapter-item expanded "><a href="log_contexts.html">Log Contexts</a></li><li class="chapter-item expanded "><a href="replication.html">Replication</a></li><li class="chapter-item expanded "><a href="development/synapse_architecture/streams.html">Streams</a></li><li class="chapter-item expanded "><a href="tcp_replication.html">TCP Replication</a></li><li class="chapter-item expanded "><a href="development/synapse_architecture/faster_joins.html">Faster remote joins</a></li></ol></li><li class="chapter-item expanded "><a href="development/internal_documentation/index.html">Internal Documentation</a></li><li><ol class="section"><li class="chapter-item expanded "><div>Single Sign-On</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="development/saml.html">SAML</a></li><li class="chapter-item expanded "><a href="development/cas.html">CAS</a></li></ol></li><li class="chapter-item expanded "><a href="development/room-dag-concepts.html">Room DAG concepts</a></li><li class="chapter-item expanded "><div>State Resolution</div></li><li><ol class="section"><li class="chapter-item expanded "><a href="auth_chain_difference_algorithm.html">The Auth Chain Difference Algorithm</a></li></ol></li><li class="chapter-item expanded "><a href="media_repository.html">Media Repository</a></li><li class="chapter-item expanded "><a href="room_and_user_statistics.html">Room and User Statistics</a></li></ol></li><li class="chapter-item expanded "><div>Scripts</div></li><li class="chapter-item expanded affix "><li class="part-title">Other</li><li class="chapter-item expanded "><a href="deprecation_policy.html">Dependency Deprecation Policy</a></li><li class="chapter-item expanded "><a href="other/running_synapse_on_single_board_computers.html">Running Synapse on a Single-Board Computer</a></li></ol> + </div> + <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div> + </nav> + + <div id="page-wrapper" class="page-wrapper"> + + <div class="page"> + <div id="menu-bar-hover-placeholder"></div> + <div id="menu-bar" class="menu-bar sticky bordered"> + <div class="left-buttons"> + <button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar"> + <i class="fa fa-bars"></i> + </button> + <button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list"> + <i class="fa 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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/user_directory.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="user-directory-api-implementation"><a class="header" href="#user-directory-api-implementation">User Directory API Implementation</a></h1> +<p>The user directory is maintained based on users that are 'visible' to the homeserver - +i.e. ones which are local to the server and ones which any local user shares a +room with.</p> +<p>The directory info is stored in various tables, which can sometimes get out of +sync (although this is considered a bug). If this happens, for now the +solution to fix it is to use the <a href="usage/administration/admin_api/background_updates.html#run">admin API</a> +and execute the job <code>regenerate_directory</code>. This should then start a background task to +flush the current tables and regenerate the directory. Depending on the size +of your homeserver (number of users and rooms) this can take a while.</p> +<h2 id="data-model"><a class="header" href="#data-model">Data model</a></h2> +<p>There are five relevant tables that collectively form the "user directory". +Three of them track a list of all known users. The last two (collectively called +the "search tables") track which users are visible to each other.</p> +<p>From all of these tables we exclude three types of local user:</p> +<ul> +<li>support users</li> +<li>appservice users</li> +<li>deactivated users</li> +</ul> +<p>A description of each table follows:</p> +<ul> +<li> +<p><code>user_directory</code>. This contains the user ID, display name and avatar of each user.</p> +<ul> +<li>Because there is only one directory entry per user, it is important that it +only contain publicly visible information. Otherwise, this will leak the +nickname or avatar used in a private room.</li> +<li>Indexed on rooms. Indexed on users.</li> +</ul> +</li> +<li> +<p><code>user_directory_search</code>. To be joined to <code>user_directory</code>. It contains an extra +column that enables full text search based on user IDs and display names. +Different schemas for SQLite and Postgres are used.</p> +<ul> +<li>Indexed on the full text search data. Indexed on users.</li> +</ul> +</li> +<li> +<p><code>user_directory_stream_pos</code>. When the initial background update to populate +the directory is complete, we record a stream position here. This indicates +that synapse should now listen for room changes and incrementally update +the directory where necessary. (See <a href="development/synapse_architecture/streams.html">stream positions</a>.)</p> +</li> +<li> +<p><code>users_in_public_rooms</code>. Contains associations between users and the public +rooms they're in. Used to determine which users are in public rooms and should +be publicly visible in the directory. Both local and remote users are tracked.</p> +</li> +<li> +<p><code>users_who_share_private_rooms</code>. Rows are triples <code>(L, M, room id)</code> where <code>L</code> +is a local user and <code>M</code> is a local or remote user. <code>L</code> and <code>M</code> should be +different, but this isn't enforced by a constraint.</p> +<p>Note that if two local users share a room then there will be two entries: +<code>(user1, user2, !room_id)</code> and <code>(user2, user1, !room_id)</code>.</p> +</li> +</ul> +<h2 id="configuration-options"><a class="header" href="#configuration-options">Configuration options</a></h2> +<p>The exact way user search works can be tweaked via some server-level +<a href="usage/configuration/config_documentation.html#user_directory">configuration options</a>.</p> +<p>The information is not repeated here, but the options are mentioned below.</p> +<h2 id="search-algorithm"><a class="header" href="#search-algorithm">Search algorithm</a></h2> +<p>If <code>search_all_users</code> is <code>false</code>, then results are limited to users who:</p> +<ol> +<li>Are found in the <code>users_in_public_rooms</code> table, or</li> +<li>Are found in the <code>users_who_share_private_rooms</code> where <code>L</code> is the requesting +user and <code>M</code> is the search result.</li> +</ol> +<p>Otherwise, if <code>search_all_users</code> is <code>true</code>, no such limits are placed and all +users known to the server (matching the search query) will be returned.</p> +<p>By default, locked users are not returned. If <code>show_locked_users</code> is <code>true</code> then +no filtering on the locked status of a user is done.</p> +<p>The user provided search term is lowercased and normalized using <a href="https://en.wikipedia.org/wiki/Unicode_equivalence#Normalization">NFKC</a>, +this treats the string as case-insensitive, canonicalizes different forms of the +same text, and maps some "roughly equivalent" characters together.</p> +<p>The search term is then split into words:</p> +<ul> +<li>If <a href="https://en.wikipedia.org/wiki/International_Components_for_Unicode">ICU</a> is +available, then the system's <a href="https://unicode-org.github.io/icu/userguide/locale/#default-locales">default locale</a> +will be used to break the search term into words. (See the +<a href="setup/installation.html">installation instructions</a> for how to install ICU.)</li> +<li>If unavailable, then runs of ASCII characters, numbers, underscores, and hyphens +are considered words.</li> +</ul> +<p>The queries for PostgreSQL and SQLite are detailed below, by their overall goal +is to find matching users, preferring users who are "real" (e.g. not bots, +not deactivated). It is assumed that real users will have an display name and +avatar set.</p> +<h3 id="postgresql"><a class="header" href="#postgresql">PostgreSQL</a></h3> +<p>The above words are then transformed into two queries:</p> +<ol> +<li>"exact" which matches the parsed words exactly (using <a href="https://www.postgresql.org/docs/current/textsearch-controls.html#TEXTSEARCH-PARSING-QUERIES"><code>to_tsquery</code></a>);</li> +<li>"prefix" which matches the parsed words as prefixes (using <code>to_tsquery</code>).</li> +</ol> +<p>Results are composed of all rows in the <code>user_directory_search</code> table whose information +matches one (or both) of these queries. Results are ordered by calculating a weighted +score for each result, higher scores are returned first:</p> +<ul> +<li>4x if a user ID exists.</li> +<li>1.2x if the user has a display name set.</li> +<li>1.2x if the user has an avatar set.</li> +<li>0x-3x by the full text search results using the <a href="https://www.postgresql.org/docs/current/textsearch-controls.html#TEXTSEARCH-RANKING"><code>ts_rank_cd</code> function</a> +against the "exact" search query; this has four variables with the following weightings: +<ul> +<li><code>D</code>: 0.1 for the user ID's domain</li> +<li><code>C</code>: 0.1 for unused</li> +<li><code>B</code>: 0.9 for the user's display name (or an empty string if it is not set)</li> +<li><code>A</code>: 0.1 for the user ID's localpart</li> +</ul> +</li> +<li>0x-1x by the full text search results using the <code>ts_rank_cd</code> function against the +"prefix" search query. (Using the same weightings as above.)</li> +<li>If <code>prefer_local_users</code> is <code>true</code>, then 2x if the user is local to the homeserver.</li> +</ul> +<p>Note that <code>ts_rank_cd</code> returns a weight between 0 and 1. The initial weighting of +all results is 1.</p> +<h3 id="sqlite"><a class="header" href="#sqlite">SQLite</a></h3> +<p>Results are composed of all rows in the <code>user_directory_search</code> whose information +matches the query. Results are ordered by the following information, with each +subsequent column used as a tiebreaker, for each result:</p> +<ol> +<li>By the <a href="https://www.sqlite.org/windowfunctions.html#built_in_window_functions"><code>rank</code></a> +of the full text search results using the <a href="https://www.sqlite.org/fts3.html#matchinfo"><code>matchinfo</code> function</a>. Higher +ranks are returned first.</li> +<li>If <code>prefer_local_users</code> is <code>true</code>, then users local to the homeserver are +returned first.</li> +<li>Users with a display name set are returned first.</li> +<li>Users with an avatar set are returned first.</li> +</ol> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="consent_tracking.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="message_retention_policies.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="consent_tracking.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="message_retention_policies.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 |