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java.lang.Object org.springframework.web.filter.GenericFilterBean org.springframework.security.web.FilterChainProxy
public class FilterChainProxy
Delegates Filter
requests to a list of Spring-managed beans.
As of version 2.0, you shouldn't need to explicitly configure a FilterChainProxy bean 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.
The FilterChainProxy
is loaded via a standard Spring DelegatingFilterProxy
declaration in
web.xml
. FilterChainProxy
will then pass GenericFilterBean.init(FilterConfig)
, GenericFilterBean.destroy()
and doFilter(ServletRequest, ServletResponse, FilterChain)
invocations through to each Filter
defined against FilterChainProxy
.
As of version 2.0, FilterChainProxy is configured using an ordered Map of path patterns to Lists
of Filter objects. In previous
versions, a FilterInvocationSecurityMetadataSource
was used. This is now deprecated in favour of namespace-based
configuration which provides a more robust and simplfied syntax. The Map instance will normally be
created while parsing the namespace configuration, so doesn't have to be set explicitly.
Instead the <filter-chain-map> element should be used within the FilterChainProxy bean declaration.
This in turn should have a list of child <filter-chain> elements which each define 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"> <security:filter-chain-map pathType="ant"> <security:filter-chain pattern="/do/not/filter" filters="none"/> <security:filter-chain pattern="/**" filters="filter1,filter2,filter3"/> </security:filter-chain-map> </bean>The names "filter1", "filter2", "filter3" should be the bean names of Filter instances 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 Please consult the security namespace schema file for a full list of available configuration options.
Each possible URI pattern that FilterChainProxy
should service must be entered.
The first matching URI pattern for a given request will be used to define all of the
Filter
s that apply to that request. NB: This means you must put most specific URI patterns at the top
of the list, and ensure all Filter
s that should apply for a given URI pattern are entered against the
respective entry. The FilterChainProxy
will not iterate the remainder of the URI patterns to locate
additional Filter
s.
FilterChainProxy
respects normal handling of Filter
s that elect not to call Filter.doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse,
javax.servlet.FilterChain)
, in that the remainder of the original or FilterChainProxy
-declared filter
chain will not be called.
Note the 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. By default the DelegatingFilterProxy
will never call this class' GenericFilterBean.init(FilterConfig)
and GenericFilterBean.destroy()
methods, which in turns means that
the corresponding methods on the filter beans managed by this class will never be called. If you do need your filters to be
initialized and destroyed, please set the targetFilterLifecycle initialization parameter against the
DelegatingFilterProxy
to specify that servlet container lifecycle management should be used. You don't
need to worry about this in most cases.
Nested Class Summary | |
---|---|
static interface |
FilterChainProxy.FilterChainValidator
|
Field Summary | |
---|---|
static String |
TOKEN_NONE
|
Constructor Summary | |
---|---|
FilterChainProxy()
|
Method Summary | |
---|---|
void |
afterPropertiesSet()
|
void |
doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
|
Map<String,List<Filter>> |
getFilterChainMap()
Returns a copy of the underlying filter chain map. |
List<Filter> |
getFilters(String url)
Returns the first filter chain matching the supplied URL. |
UrlMatcher |
getMatcher()
|
protected Collection<Filter> |
obtainAllDefinedFilters()
Obtains all of the unique Filter instances registered in the map of
filter chains. |
void |
setFilterChainMap(Map filterChainMap)
Sets the mapping of URL patterns to filter chains. |
void |
setFilterChainValidator(FilterChainProxy.FilterChainValidator filterChainValidator)
Used (internally) to specify a validation strategy for the filters in each configured chain. |
void |
setMatcher(UrlMatcher matcher)
|
void |
setStripQueryStringFromUrls(boolean stripQueryStringFromUrls)
If set to 'true', the query string will be stripped from the request URL before attempting to find a matching filter chain. |
String |
toString()
|
Methods inherited from class org.springframework.web.filter.GenericFilterBean |
---|
addRequiredProperty, destroy, getFilterConfig, getFilterName, getServletContext, init, initBeanWrapper, initFilterBean, setBeanName, setServletContext |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
---|
public static final String TOKEN_NONE
Constructor Detail |
---|
public FilterChainProxy()
Method Detail |
---|
public void afterPropertiesSet()
afterPropertiesSet
in interface InitializingBean
afterPropertiesSet
in class GenericFilterBean
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
IOException
ServletException
public List<Filter> getFilters(String url)
url
- the request URL
protected Collection<Filter> obtainAllDefinedFilters()
Filter
instances registered in the map of
filter chains.
This is useful in ensuring a Filter
is not initialized or destroyed twice.
Filter
instances in the application context which have an entry
in the map (only one entry is included in the array for
each Filter
that actually exists in application context, even if a given
Filter
is defined multiples times in the filter chain map)public void setFilterChainMap(Map filterChainMap)
filterChainMap
- the map of path Strings to List<Filter>s.public Map<String,List<Filter>> getFilterChainMap()
public void setMatcher(UrlMatcher matcher)
public UrlMatcher getMatcher()
public void setStripQueryStringFromUrls(boolean stripQueryStringFromUrls)
public void setFilterChainValidator(FilterChainProxy.FilterChainValidator filterChainValidator)
filterChainValidator
- public String toString()
toString
in class Object
|
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