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    copied!<p>You need to write a Valve or a Realm on container-side which sets the UserPrincipal into the request.</p> <p>As done <a href="http://www.grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/authenticator/BasicAuthenticator.java#157" rel="nofollow">here</a>:</p> <pre><a href="http://grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/authenticator/BasicAuthenticator.java#157" rel="nofollow">157</a> principal = context.<a href="http://grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/Container.java#Container.getRealm%28%29" rel="nofollow" title="org.apache.catalina.Container.getRealm() : Realm">getRealm</a>().<a href="http://grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/Realm.java#Realm.authenticate%28java.lang.String%2Cjava.lang.String%29" rel="nofollow" title="org.apache.catalina.Realm.authenticate(java.lang.String,java.lang.String) : Principal">authenticate</a>(username, password);<br/><a href="http://grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/authenticator/BasicAuthenticator.java#158" rel="nofollow">158</a> <b>if</b> (principal != <b>null</b>) {<br/><a href="http://grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/authenticator/BasicAuthenticator.java#159" rel="nofollow">159</a> <a href="http://grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/authenticator/AuthenticatorBase.java#AuthenticatorBase.register%28org.apache.catalina.connector.Request%2Cjavax.servlet.http.HttpServletResponse%2Cjava.security.Principal%2Cjava.lang.String%2Cjava.lang.String%2Cjava.lang.String%29" rel="nofollow" title="org.apache.catalina.authenticator.AuthenticatorBase.register(org.apache.catalina.connector.Request,javax.servlet.http.HttpServletResponse,java.security.Principal,java.lang.String,java.lang.String,java.lang.String) : void">register</a>(request, response, principal, Constants.BASIC_METHOD,<br/><a href="http://grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/authenticator/BasicAuthenticator.java#160" rel="nofollow">160</a> username, password);<br/><a href="http://grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/authenticator/BasicAuthenticator.java#161" rel="nofollow">161</a> <b>return</b> (<b>true</b>);<br/><a href="http://grepcode.com/file/repository.springsource.com/org.apache.catalina/com.springsource.org.apache.catalina/7.0.12/org/apache/catalina/authenticator/BasicAuthenticator.java#162" rel="nofollow">162</a> }<br/></pre>
 

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