org.acegisecurity.ui.basicauth
Class BasicProcessingFilter

java.lang.Object
  org.acegisecurity.ui.basicauth.BasicProcessingFilter

All Implemented Interfaces:

javax.servlet.Filter, InitializingBean

public class BasicProcessingFilter
extends Object
implements javax.servlet.Filter, InitializingBean

Processes a HTTP request's BASIC authorization headers, putting the result into the SecurityContextHolder.

For a detailed background on what this filter is designed to process, refer to RFC 1945, Section 11.1. Any realm name presented in the HTTP request is ignored.

In summary, this filter is responsible for processing any request that has a HTTP request header of Authorization with an authentication scheme of Basic and a Base64-encoded username:password token. For example, to authenticate user "Aladdin" with password "open sesame" the following header would be presented:

Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==.

This filter can be used to provide BASIC authentication services to both remoting protocol clients (such as Hessian and SOAP) as well as standard user agents (such as Internet Explorer and Netscape).

If authentication is successful, the resulting Authentication object will be placed into the SecurityContextHolder.

If authentication fails, an AuthenticationEntryPoint implementation is called. Usually this should be BasicProcessingFilterEntryPoint, which will prompt the user to authenticate again via BASIC authentication.

Basic authentication is an attractive protocol because it is simple and widely deployed. However, it still transmits a password in clear text and as such is undesirable in many situations. Digest authentication is also provided by Acegi Security and should be used instead of Basic authentication wherever possible. See DigestProcessingFilter.

Do not use this class directly. Instead configure web.xml to use the FilterToBeanProxy.

Version:

$Id: BasicProcessingFilter.java,v 1.16 2005/11/17 00:56:48 benalex Exp $

Author:

Ben Alex

Constructor Summary

BasicProcessingFilter()

Method Summary

void	afterPropertiesSet()
void	destroy()
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)
AuthenticationEntryPoint	getAuthenticationEntryPoint()
AuthenticationManager	getAuthenticationManager()
void	init(javax.servlet.FilterConfig arg0)
void	setAuthenticationEntryPoint(AuthenticationEntryPoint authenticationEntryPoint)
void	setAuthenticationManager(AuthenticationManager authenticationManager)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BasicProcessingFilter

public BasicProcessingFilter()

Method Detail

setAuthenticationEntryPoint

public void setAuthenticationEntryPoint(AuthenticationEntryPoint authenticationEntryPoint)

getAuthenticationEntryPoint

public AuthenticationEntryPoint getAuthenticationEntryPoint()

setAuthenticationManager

public void setAuthenticationManager(AuthenticationManager authenticationManager)

getAuthenticationManager

public AuthenticationManager getAuthenticationManager()

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Specified by:

afterPropertiesSet in interface InitializingBean

Throws:

Exception

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Filter

doFilter

public void doFilter(javax.servlet.ServletRequest request,
                     javax.servlet.ServletResponse response,
                     javax.servlet.FilterChain chain)
              throws IOException,
                     javax.servlet.ServletException

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

IOException

javax.servlet.ServletException

init

public void init(javax.servlet.FilterConfig arg0)
          throws javax.servlet.ServletException

Specified by:

init in interface javax.servlet.Filter

Throws:

javax.servlet.ServletException