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diff --git a/docs/manual/mod/mod_session_dbd.html.en b/docs/manual/mod/mod_session_dbd.html.en new file mode 100644 index 0000000..d3fc5d7 --- /dev/null +++ b/docs/manual/mod/mod_session_dbd.html.en @@ -0,0 +1,357 @@ +<?xml version="1.0" encoding="ISO-8859-1"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> +<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" /> +<!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>mod_session_dbd - Apache HTTP Server Version 2.4</title> +<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> +<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> +<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.min.js" type="text/javascript"> +</script> + +<link href="../images/favicon.ico" rel="shortcut icon" /></head> +<body> +<div id="page-header"> +<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> +<p class="apache">Apache HTTP Server Version 2.4</p> +<img alt="" src="../images/feather.png" /></div> +<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> +<div id="path"> +<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div> +<div id="page-content"> +<div id="preamble"><h1>Apache Module mod_session_dbd</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_session_dbd.html" title="English"> en </a> | +<a href="../fr/mod/mod_session_dbd.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div> +<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>DBD/SQL based session support</td></tr> +<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>session_dbd_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_session_dbd.c</td></tr> +<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3 and later</td></tr></table> +<h3>Summary</h3> + + <div class="warning"><h3>Warning</h3> + <p>The session modules make use of HTTP cookies, and as such can fall + victim to Cross Site Scripting attacks, or expose potentially private + information to clients. Please ensure that the relevant risks have + been taken into account before enabling the session functionality on + your server.</p> + </div> + + <p>This submodule of <code class="module"><a href="../mod/mod_session.html">mod_session</a></code> provides support for the + storage of user sessions within a SQL database using the + <code class="module"><a href="../mod/mod_dbd.html">mod_dbd</a></code> module.</p> + + <p>Sessions can either be <strong>anonymous</strong>, where the session is + keyed by a unique UUID string stored on the browser in a cookie, or + <strong>per user</strong>, where the session is keyed against the userid of + the logged in user.</p> + + <p>SQL based sessions are hidden from the browser, and so offer a measure of + privacy without the need for encryption.</p> + + <p>Different webservers within a server farm may choose to share a database, + and so share sessions with one another.</p> + + <p>For more details on the session interface, see the documentation for + the <code class="module"><a href="../mod/mod_session.html">mod_session</a></code> module.</p> + +</div> +<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3>Topics</h3> +<ul id="topics"> +<li><img alt="" src="../images/down.gif" /> <a href="#dbdconfig">DBD Configuration</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#anonymous">Anonymous Sessions</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#peruser">Per User Sessions</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#housekeeping">Database Housekeeping</a></li> +</ul><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdcookiename">SessionDBDCookieName</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdcookiename2">SessionDBDCookieName2</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdcookieremove">SessionDBDCookieRemove</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbddeletelabel">SessionDBDDeleteLabel</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdinsertlabel">SessionDBDInsertLabel</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdperuser">SessionDBDPerUser</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdselectlabel">SessionDBDSelectLabel</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#sessiondbdupdatelabel">SessionDBDUpdateLabel</a></li> +</ul> +<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_session_dbd">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_session_dbd">Report a bug</a></li></ul><h3>See also</h3> +<ul class="seealso"> +<li><code class="module"><a href="../mod/mod_session.html">mod_session</a></code></li> +<li><code class="module"><a href="../mod/mod_session_crypto.html">mod_session_crypto</a></code></li> +<li><code class="module"><a href="../mod/mod_session_cookie.html">mod_session_cookie</a></code></li> +<li><code class="module"><a href="../mod/mod_dbd.html">mod_dbd</a></code></li> +<li><a href="#comments_section">Comments</a></li></ul></div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="dbdconfig" id="dbdconfig">DBD Configuration</a></h2> + + <p>Before the <code class="module"><a href="../mod/mod_session_dbd.html">mod_session_dbd</a></code> module can be configured to maintain a + session, the <code class="module"><a href="../mod/mod_dbd.html">mod_dbd</a></code> module must be configured to make the various database queries + available to the server.</p> + + <p>There are four queries required to keep a session maintained, to select an existing session, + to update an existing session, to insert a new session, and to delete an expired or empty + session. These queries are configured as per the example below.</p> + + <div class="example"><h3>Sample DBD configuration</h3><pre class="prettyprint lang-config">DBDriver pgsql +DBDParams "dbname=apachesession user=apache password=xxxxx host=localhost" +DBDPrepareSQL "delete from session where key = %s" deletesession +DBDPrepareSQL "update session set value = %s, expiry = %lld, key = %s where key = %s" updatesession +DBDPrepareSQL "insert into session (value, expiry, key) values (%s, %lld, %s)" insertsession +DBDPrepareSQL "select value from session where key = %s and (expiry = 0 or expiry > %lld)" selectsession +DBDPrepareSQL "delete from session where expiry != 0 and expiry < %lld" cleansession</pre> +</div> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="anonymous" id="anonymous">Anonymous Sessions</a></h2> + + <p>Anonymous sessions are keyed against a unique UUID, and stored on the + browser within an HTTP cookie. This method is similar to that used by most + application servers to store session information.</p> + + <p>To create a simple anonymous session and store it in a postgres database + table called <var>apachesession</var>, and save the session ID in a cookie + called <var>session</var>, configure the session as follows:</p> + + <div class="example"><h3>SQL based anonymous session</h3><pre class="prettyprint lang-config">Session On +SessionDBDCookieName session path=/</pre> +</div> + + <p>For more examples on how the session can be configured to be read + from and written to by a CGI application, see the + <code class="module"><a href="../mod/mod_session.html">mod_session</a></code> examples section.</p> + + <p>For documentation on how the session can be used to store username + and password details, see the <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code> module.</p> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="peruser" id="peruser">Per User Sessions</a></h2> + + <p>Per user sessions are keyed against the username of a successfully + authenticated user. It offers the most privacy, as no external handle + to the session exists outside of the authenticated realm.</p> + + <p>Per user sessions work within a correctly configured authenticated + environment, be that using basic authentication, digest authentication + or SSL client certificates. Due to the limitations of who came first, + the chicken or the egg, per user sessions cannot be used to store + authentication credentials from a module like + <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code>.</p> + + <p>To create a simple per user session and store it in a postgres database + table called <var>apachesession</var>, and with the session keyed to the + userid, configure the session as follows:</p> + + <div class="example"><h3>SQL based per user session</h3><pre class="prettyprint lang-config">Session On +SessionDBDPerUser On</pre> +</div> + + </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="housekeeping" id="housekeeping">Database Housekeeping</a></h2> + <p>Over the course of time, the database can be expected to start accumulating + expired sessions. At this point, the <code class="module"><a href="../mod/mod_session_dbd.html">mod_session_dbd</a></code> module + is not yet able to handle session expiry automatically.</p> + + <div class="warning"><h3>Warning</h3> + <p>The administrator will need to set up an external process via cron to clean + out expired sessions.</p> + </div> + + </div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="SessionDBDCookieName" id="SessionDBDCookieName">SessionDBDCookieName</a> <a name="sessiondbdcookiename" id="sessiondbdcookiename">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Name and attributes for the RFC2109 cookie storing the session ID</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDCookieName <var>name</var> <var>attributes</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr> +</table> + <p>The <code class="directive">SessionDBDCookieName</code> directive specifies the name and + optional attributes of an RFC2109 compliant cookie inside which the session ID will + be stored. RFC2109 cookies are set using the <code>Set-Cookie</code> HTTP header. + </p> + + <p>An optional list of cookie attributes can be specified, as per the example below. + These attributes are inserted into the cookie as is, and are not interpreted by + Apache. Ensure that your attributes are defined correctly as per the cookie specification. + </p> + + <div class="example"><h3>Cookie with attributes</h3><pre class="prettyprint lang-config">Session On +SessionDBDCookieName session path=/private;domain=example.com;httponly;secure;version=1;</pre> +</div> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="SessionDBDCookieName2" id="SessionDBDCookieName2">SessionDBDCookieName2</a> <a name="sessiondbdcookiename2" id="sessiondbdcookiename2">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Name and attributes for the RFC2965 cookie storing the session ID</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDCookieName2 <var>name</var> <var>attributes</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr> +</table> + <p>The <code class="directive">SessionDBDCookieName2</code> directive specifies the name and + optional attributes of an RFC2965 compliant cookie inside which the session ID will + be stored. RFC2965 cookies are set using the <code>Set-Cookie2</code> HTTP header. + </p> + + <p>An optional list of cookie attributes can be specified, as per the example below. + These attributes are inserted into the cookie as is, and are not interpreted by + Apache. Ensure that your attributes are defined correctly as per the cookie specification. + </p> + + <div class="example"><h3>Cookie2 with attributes</h3><pre class="prettyprint lang-config">Session On +SessionDBDCookieName2 session path=/private;domain=example.com;httponly;secure;version=1;</pre> +</div> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="SessionDBDCookieRemove" id="SessionDBDCookieRemove">SessionDBDCookieRemove</a> <a name="sessiondbdcookieremove" id="sessiondbdcookieremove">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Control for whether session ID cookies should be removed from incoming HTTP headers</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDCookieRemove On|Off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDCookieRemove On</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr> +</table> + <p>The <code class="directive">SessionDBDCookieRemove</code> flag controls whether the cookies + containing the session ID will be removed from the headers during request processing.</p> + + <p>In a reverse proxy situation where the Apache server acts as a server frontend for + a backend origin server, revealing the contents of the session ID cookie to the backend + could be a potential privacy violation. When set to on, the session ID cookie will be + removed from the incoming HTTP headers.</p> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="SessionDBDDeleteLabel" id="SessionDBDDeleteLabel">SessionDBDDeleteLabel</a> <a name="sessiondbddeletelabel" id="sessiondbddeletelabel">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The SQL query to use to remove sessions from the database</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDDeleteLabel <var>label</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDDeleteLabel deletesession</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr> +</table> + <p>The <code class="directive">SessionDBDDeleteLabel</code> directive sets the default delete + query label to be used to delete an expired or empty session. This label must have been previously + defined using the <code class="directive"><a href="../mod/mod_dbd.html#dbdpreparesql">DBDPrepareSQL</a></code> directive.</p> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="SessionDBDInsertLabel" id="SessionDBDInsertLabel">SessionDBDInsertLabel</a> <a name="sessiondbdinsertlabel" id="sessiondbdinsertlabel">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The SQL query to use to insert sessions into the database</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDInsertLabel <var>label</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDInsertLabel insertsession</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr> +</table> + <p>The <code class="directive">SessionDBDInsertLabel</code> directive sets the default insert + query label to be used to load in a session. This label must have been previously defined using the + <code class="directive"><a href="../mod/mod_dbd.html#dbdpreparesql">DBDPrepareSQL</a></code> directive.</p> + + <p>If an attempt to update the session affects no rows, this query will be called to insert the + session into the database.</p> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="SessionDBDPerUser" id="SessionDBDPerUser">SessionDBDPerUser</a> <a name="sessiondbdperuser" id="sessiondbdperuser">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable a per user session</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDPerUser On|Off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDPerUser Off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr> +</table> + <p>The <code class="directive">SessionDBDPerUser</code> flag enables a per user session keyed + against the user's login name. If the user is not logged in, this directive will be + ignored.</p> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="SessionDBDSelectLabel" id="SessionDBDSelectLabel">SessionDBDSelectLabel</a> <a name="sessiondbdselectlabel" id="sessiondbdselectlabel">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The SQL query to use to select sessions from the database</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDSelectLabel <var>label</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDSelectLabel selectsession</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr> +</table> + <p>The <code class="directive">SessionDBDSelectLabel</code> directive sets the default select + query label to be used to load in a session. This label must have been previously defined using the + <code class="directive"><a href="../mod/mod_dbd.html#dbdpreparesql">DBDPrepareSQL</a></code> directive.</p> + + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="SessionDBDUpdateLabel" id="SessionDBDUpdateLabel">SessionDBDUpdateLabel</a> <a name="sessiondbdupdatelabel" id="sessiondbdupdatelabel">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The SQL query to use to update existing sessions in the database</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionDBDUpdateLabel <var>label</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SessionDBDUpdateLabel updatesession</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_dbd</td></tr> +</table> + <p>The <code class="directive">SessionDBDUpdateLabel</code> directive sets the default update + query label to be used to load in a session. This label must have been previously defined using the + <code class="directive"><a href="../mod/mod_dbd.html#dbdpreparesql">DBDPrepareSQL</a></code> directive.</p> + + <p>If an attempt to update the session affects no rows, the insert query will be + called to insert the session into the database. If the database supports InsertOrUpdate, + override this query to perform the update in one query instead of two.</p> + + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_session_dbd.html" title="English"> en </a> | +<a href="../fr/mod/mod_session_dbd.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again by our moderators if they are either implemented or considered invalid/off-topic. 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