public class FilterChainProxy extends GenericFilterBean
Filterrequests to a list of Spring-managed filter beans. As of version 2.0, you shouldn't need to explicitly configure a
FilterChainProxybean in your application context unless you need very fine control over the filter chain contents. Most cases should be adequately covered by the default
<security:http />namespace configuration options.
FilterChainProxy is linked into the servlet container filter chain by
adding a standard Spring
DelegatingFilterProxy declaration in the application
As of version 3.1,
FilterChainProxy is configured using a list of
SecurityFilterChain instances, each of which contains a
and a list of filters which should be applied to matching requests. Most applications
will only contain a single filter chain, and if you are using the namespace, you don't
have to set the chains explicitly. If you require finer-grained control, you can make
use of the
<filter-chain> namespace element. This defines a URI pattern
and the list of filters (as comma-separated bean names) which should be applied to
requests which match the pattern. An example configuration might look like this:
<bean id="myfilterChainProxy" class="org.springframework.security.util.FilterChainProxy"> <constructor-arg> <util:list> <security:filter-chain pattern="/do/not/filter*" filters="none"/> <security:filter-chain pattern="/**" filters="filter1,filter2,filter3"/> </util:list> </constructor-arg> </bean>The names "filter1", "filter2", "filter3" should be the bean names of
Filterinstances defined in the application context. The order of the names defines the order in which the filters will be applied. As shown above, use of the value "none" for the "filters" can be used to exclude a request pattern from the security filter chain entirely. Please consult the security namespace schema file for a full list of available configuration options.
Each possible pattern that the
FilterChainProxy should service must be entered.
The first match for a given request will be used to define all of the
that apply to that request. This means you must put most specific matches at the top of
the list, and ensure all
Filters that should apply for a given matcher are
entered against the respective entry. The
FilterChainProxy will not iterate
through the remainder of the map entries to locate additional
FilterChainProxy respects normal handling of
Filters that elect not to
Filter.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
, in that the remainder of the original or
chain will not be called.
HttpFirewallinstance is used to validate incoming requests and create a wrapped request which provides consistent path values for matching against. See
DefaultHttpFirewall, for more information on the type of attacks which the default implementation protects against. A custom implementation can be injected to provide stricter control over the request contents or if an application needs to support certain types of request which are rejected by default.
Note that this means that you must use the Spring Security filters in combination with
FilterChainProxy if you want this protection. Don't define them explicitly in
FilterChainProxy will use the firewall instance to obtain both request and
response objects which will be fed down the filter chain, so it is also possible to use
this functionality to control the functionality of the response. When the request has
passed through the security filter chain, the
reset method will be called. With
the default implementation this means that the original values of
pathInfo will be returned thereafter, instead of the modified ones used for
security pattern matching.
Since this additional wrapping functionality is performed by the
FilterChainProxy, we don't recommend that you use multiple instances in the
same filter chain. It shouldn't be considered purely as a utility for wrapping filter
beans in a single
Filter lifecycle mismatch between the servlet container and IoC
container. As described in the
DelegatingFilterProxy Javadocs, we recommend you
allow the IoC container to manage the lifecycle instead of the servlet container.
FilterChainProxy does not invoke the standard filter lifecycle methods on any
filter beans that you add to the application context.
|Modifier and Type||Class and Description|
|Constructor and Description|
|Modifier and Type||Method and Description|
Convenience method, mainly for testing.
Used (internally) to specify a validation strategy for the filters in each configured chain.
Sets the "firewall" implementation which will be used to validate and wrap (or potentially reject) the incoming requests.
addRequiredProperty, destroy, getFilterConfig, getFilterName, getServletContext, init, initBeanWrapper, initFilterBean, setBeanName, setEnvironment, setServletContext
public FilterChainProxy(SecurityFilterChain chain)
public void afterPropertiesSet()
public void doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain) throws IOException, javax.servlet.ServletException
url- the URL
public List<SecurityFilterChain> getFilterChains()
SecurityFilterChains which will be matched against and applied to incoming requests.
public void setFilterChainValidator(FilterChainProxy.FilterChainValidator filterChainValidator)
filterChainValidator- the validator instance which will be invoked on during initialization to check the
public void setFirewall(HttpFirewall firewall)