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<h1>Access Controllers</h1>
<div id="front-matter">
<div id="minitoc-area">
<ul class="minitoc">
<li>
<a href="#Introduction">Introduction</a>
</li>
<li>
<a href="#Defining+the+Role+in+lenya.roles">Defining the Role in lenya.roles</a>
</li>
<li>
<a href="#Declaring+an+AccessController+in+cocoon.xconf">Declaring an AccessController in cocoon.xconf</a>
</li>
<li>
<a href="#Default+Access+Controller">Default Access Controller</a>
</li>
<li>
<a href="#Bypassable+Access+Controller">Bypassable Access Controller</a>
</li>
<li>
<a href="#Customizing+Access+Control">Customizing Access Control</a>
</li>
</ul>
</div>
</div>
<a name="N1000E"></a><a name="Introduction"></a>
<h2 class="h3">Introduction</h2>
<div class="section">
<p>An <em>AccessController</em> has the responsibility to authenticate
clients and to authorize requests.</p>
</div>
<a name="N1001B"></a><a name="Defining+the+Role+in+lenya.roles"></a>
<h2 class="h3">Defining the Role in lenya.roles</h2>
<div class="section">
<pre class="code">&lt;role name="org.apache.lenya.ac.AccessController"
shorthand="access-controller"
default-class="org.apache.lenya.ac.impl.BypassableAccessController"/&gt;</pre>
</div>
<a name="N10026"></a><a name="Declaring+an+AccessController+in+cocoon.xconf"></a>
<h2 class="h3">Declaring an AccessController in cocoon.xconf</h2>
<div class="section">
<p>
Each <em>AccessController</em> component needs a type that is attached to the
<span class="codefrag">role</span> attribute, separated with a slash (/). This allows you to choose an
<em>AccessController</em> in your publication in combination with the
Publication<a href="accesscontrollerresolvers.html">AccessControllerResolver</a>.
The following example shows the declaration of an <em>AccessController</em> with
the type <em>bypassable</em>:
</p>
<pre class="code">&lt;component logger="lenya.ac.accesscontroller.bypassable"
class="org.apache.lenya.ac.impl.BypassableAccessController"
role="org.apache.lenya.ac.AccessController/bypassable"&gt;
...
&lt;/component&gt;</pre>
</div>
<a name="N10047"></a><a name="Default+Access+Controller"></a>
<h2 class="h3">Default Access Controller</h2>
<div class="section">
<p>The <em>DefaultAccessController</em> combines an
<a href="authenticators.html">Authenticator</a>, a set of
<a href="authorizers.html">Authorizers</a>, an
<a href="accreditablemanagers.html">AccreditableManager</a> and a
<a href="policymanagers.html">PolicyManager</a> to perform these tasks.</p>
<pre class="code">&lt;component logger="lenya.ac.accesscontroller.default"
class="org.apache.lenya.ac.impl.DefaultAccessController"
role="org.apache.lenya.ac.AccessController/default"/&gt;</pre>
</div>
<a name="N10068"></a><a name="Bypassable+Access+Controller"></a>
<h2 class="h3">Bypassable Access Controller</h2>
<div class="section">
<p>The <em>BypassableAccessController</em> is a <em>DefaultAccessController</em> that can be
bypassed for certain URL patterns. For URLs that match those patterns
(regular expressions), access is granted for free.</p>
<p>
The <em>BypassableAccessController</em>
allows the definition of a regular expression for the public URL
patterns:
</p>
<pre class="code">&lt;component logger="lenya.ac.accesscontroller.bypassable"
class="org.apache.lenya.ac.impl.BypassableAccessController"
role="org.apache.lenya.ac.AccessController/bypassable"&gt;
&lt;public&gt;.*[.]css|.*[.]jpg|.*[.]gif&lt;/public&gt;
&lt;/component&gt;</pre>
</div>
<a name="N10082"></a><a name="Customizing+Access+Control"></a>
<h2 class="h3">Customizing Access Control</h2>
<div class="section">
<p>
<strong>How can I store my users in a database?</strong>
</p>
<p>You have to implement a <em>UserManager</em> wich accesses the database
to obtain the user information. Additionally, you have to implement an
<em>AccreditableManager</em> which uses this <em>UserManager</em>. This
<em>AccreditableManager</em> has to be declared in
<span class="codefrag">cocoon.xconf</span> and assigned to your
<em>AccessController</em> in
<span class="codefrag">lenya/pubs/mypub/config/ac/ac.xconf</span>. </p>
</div>
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