Package org.springframework.web.filter

Class UrlHandlerFilter

java.lang.Object

org.springframework.web.filter.GenericFilterBean

org.springframework.web.filter.OncePerRequestFilter

org.springframework.web.filter.UrlHandlerFilter

All Implemented Interfaces:

Filter, Aware, BeanNameAware, DisposableBean, InitializingBean, EnvironmentAware, EnvironmentCapable, ServletContextAware

public final class UrlHandlerFilter
extends OncePerRequestFilter

Filter that modifies the URL, and then either redirects or wraps the request to effect the change.

To create an instance, you can use the following:

 UrlHandlerFilter filter = UrlHandlerFilter
    .trailingSlashHandler("/path1/**").redirect(HttpStatus.PERMANENT_REDIRECT)
    .trailingSlashHandler("/path2/**").wrapRequest()
    .build();
 

This Filter should be ordered after ForwardedHeaderFilter, before ServletRequestPathFilter, and before security filters.

Since:

6.2

Author:

Rossen Stoyanchev

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	UrlHandlerFilter.Builder	Builder for UrlHandlerFilter.

Field Summary

Fields inherited from class org.springframework.web.filter.OncePerRequestFilter

ALREADY_FILTERED_SUFFIX

Method Summary

Modifier and Type	Method	Description
protected void	doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)	Same contract as for doFilter, but guaranteed to be just invoked once per request within a single request thread.
static UrlHandlerFilter.Builder.TrailingSlashSpec	trailingSlashHandler(String... pathPatterns)	Add a handler that removes the trailing slash from URL paths to ensure consistent interpretation of paths with or without a trailing slash for requestion mapping purposes.

Methods inherited from class org.springframework.web.filter.OncePerRequestFilter

doFilter, doFilterNestedErrorDispatch, getAlreadyFilteredAttributeName, isAsyncDispatch, isAsyncStarted, shouldNotFilter, shouldNotFilterAsyncDispatch, shouldNotFilterErrorDispatch

Methods inherited from class org.springframework.web.filter.GenericFilterBean

addRequiredProperty, afterPropertiesSet, createEnvironment, destroy, getEnvironment, getFilterConfig, getFilterName, getServletContext, init, initBeanWrapper, initFilterBean, setBeanName, setEnvironment, setServletContext

Methods inherited from class java.lang.Object

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

Method Details

doFilterInternal

protected void doFilterInternal(HttpServletRequest request,
 HttpServletResponse response,
 FilterChain chain)
                         throws ServletException,
IOException

Description copied from class: OncePerRequestFilter

Same contract as for doFilter, but guaranteed to be just invoked once per request within a single request thread. See OncePerRequestFilter.shouldNotFilterAsyncDispatch() for details.

Provides HttpServletRequest and HttpServletResponse arguments instead of the default ServletRequest and ServletResponse ones.

Specified by:

doFilterInternal in class OncePerRequestFilter

Throws:

ServletException

IOException

trailingSlashHandler

public static UrlHandlerFilter.Builder.TrailingSlashSpec trailingSlashHandler(String... pathPatterns)

Add a handler that removes the trailing slash from URL paths to ensure consistent interpretation of paths with or without a trailing slash for requestion mapping purposes. This is important especially to avoid misalignment between URL-based authorization decisions and web framework request mappings.

The root path "/" is excluded from trailing slash handling.

Note: A method-level @RequestMapping("/") adds a trailing slash to a type-level prefix mapping, and therefore would never match to a URL with the trailing slash removed. Use @RequestMapping without a path instead to avoid the trailing slash in the mapping.

Parameters:

pathPatterns - patterns to map the handler to, e.g. "/path/*", "/path/**", "/path/foo/"

Returns:

a spec to configure the trailing slash handler with

See Also:

• UrlHandlerFilter.Builder.trailingSlashHandler(String...)