Class WebContentInterceptor

java.lang.Object
org.springframework.context.support.ApplicationObjectSupport
org.springframework.web.context.support.WebApplicationObjectSupport
org.springframework.web.servlet.support.WebContentGenerator
org.springframework.web.servlet.mvc.WebContentInterceptor
All Implemented Interfaces:
Aware, ApplicationContextAware, ServletContextAware, HandlerInterceptor
public class WebContentInterceptor extends WebContentGenerator implements HandlerInterceptor
Handler interceptor that checks the request for supported methods and a required session and prepares the response by applying the configured cache settings.

Cache settings may be configured for specific URLs via path pattern with addCacheMapping(CacheControl, String...) and setCacheMappings(Properties), along with a fallback on default settings for all URLs via WebContentGenerator.setCacheControl(CacheControl).

Pattern matching can be done with PathMatcher or with parsed PathPatterns. The syntax is largely the same with the latter being more tailored for web usage and more efficient. The choice depends on the presence of a resolved String lookupPath or a parsed RequestPath which in turn depends on the HandlerMapping that matched the current request.

All the settings supported by this interceptor can also be set on AbstractController. This interceptor is mainly intended for applying checks and preparations to a set of controllers mapped by a HandlerMapping.

Since:
27.11.2003
Author:
Juergen Hoeller, Brian Clozel, Rossen Stoyanchev
See Also:

  • Constructor Details

  • Method Details

    • setAlwaysUseFullPath

      @Deprecated(since="5.3") public void setAlwaysUseFullPath(boolean alwaysUseFullPath)
      Deprecated.
      the path is resolved externally and obtained with ServletRequestPathUtils.getCachedPathValue(ServletRequest)
      Shortcut to the same property on the configured UrlPathHelper.

    • setUrlDecode

      @Deprecated(since="5.3") public void setUrlDecode(boolean urlDecode)
      Deprecated.
      the path is resolved externally and obtained with ServletRequestPathUtils.getCachedPathValue(ServletRequest)
      Shortcut to the same property on the configured UrlPathHelper.

    • setUrlPathHelper

      @Deprecated(since="5.3") public void setUrlPathHelper(UrlPathHelper urlPathHelper)
      Deprecated.
      the path is resolved externally and obtained with ServletRequestPathUtils.getCachedPathValue(ServletRequest)
      Set the UrlPathHelper to use for resolution of lookup paths.

    • setPathMatcher

      @Deprecated(since="7.0", forRemoval=true) public void setPathMatcher(PathMatcher pathMatcher)
      Deprecated, for removal: This API element is subject to removal in a future version.
      use of PathMatcher and UrlPathHelper is deprecated for use at runtime in web modules in favor of parsed patterns with PathPatternParser.
      Configure the PathMatcher to use to match URL paths against registered URL patterns to select the cache settings for a request.

      This is an advanced property that should be used only when a customized AntPathMatcher or a custom PathMatcher is required.

      By default this is AntPathMatcher.

      Note: Setting PathMatcher enforces use of String pattern matching even when a parsed RequestPath is available.

      See Also:

    • setCacheMappings

      public void setCacheMappings(Properties cacheMappings)
      Map settings for cache seconds to specific URL paths via patterns.

      Overrides the default cache seconds setting of this interceptor. Can specify "-1" to exclude a URL path from default caching.

      For pattern syntax see AntPathMatcher and PathPattern as well as the class-level Javadoc for details for when each is used. The syntax is largely the same with PathPattern more tailored for web usage.

      NOTE: Path patterns are not supposed to overlap. If a request matches several mappings, it is effectively undefined which one will apply (due to the lack of key ordering in java.util.Properties).

      Parameters:
      cacheMappings - a mapping between URL paths (as keys) and cache seconds (as values, need to be integer-parsable)
      See Also:

    • addCacheMapping

      public void addCacheMapping(CacheControl cacheControl, String... paths)
      Map specific URL paths to a specific CacheControl.

      Overrides the default cache seconds setting of this interceptor. Can specify an empty CacheControl instance to exclude a URL path from default caching.

      For pattern syntax see AntPathMatcher and PathPattern as well as the class-level Javadoc for details for when each is used. The syntax is largely the same with PathPattern more tailored for web usage.

      NOTE: Path patterns are not supposed to overlap. If a request matches several mappings, it is effectively undefined which one will apply (due to the lack of key ordering in the underlying java.util.HashMap).

      Parameters:
      cacheControl - the CacheControl to use
      paths - the URL paths that will map to the given CacheControl
      Since:
      4.2
      See Also:

    • preHandle

      public boolean preHandle(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response, Object handler) throws jakarta.servlet.ServletException
      Description copied from interface: HandlerInterceptor
      Interception point before the execution of a handler. Called after HandlerMapping determined an appropriate handler object, but before HandlerAdapter invokes the handler.

      DispatcherServlet processes a handler in an execution chain, consisting of any number of interceptors, with the handler itself at the end. With this method, each interceptor can decide to abort the execution chain, typically sending an HTTP error or writing a custom response.

      Note: special considerations apply for asynchronous request processing. For more details see AsyncHandlerInterceptor.

      The default implementation returns true.

      Specified by:
      preHandle in interface HandlerInterceptor
      Parameters:
      request - current HTTP request
      response - current HTTP response
      handler - chosen handler to execute, for type and/or instance evaluation
      Returns:
      true if the execution chain should proceed with the next interceptor or the handler itself. Else, DispatcherServlet assumes that this interceptor has already dealt with the response itself.
      Throws:
      jakarta.servlet.ServletException

    • lookupCacheControl

      protected @Nullable CacheControl lookupCacheControl(PathContainer path)
      Find a CacheControl instance for the given parsed path. This is used when the HandlerMapping uses parsed PathPatterns.
      Parameters:
      path - the path to match to
      Returns:
      the matched CacheControl, or null if no match
      Since:
      5.3

    • lookupCacheControl

      @Deprecated(since="7.0", forRemoval=true) protected @Nullable CacheControl lookupCacheControl(String lookupPath)
      Deprecated, for removal: This API element is subject to removal in a future version.
      use of PathMatcher and UrlPathHelper is deprecated for use at runtime in web modules in favor of parsed patterns with PathPatternParser.
      Find a CacheControl instance for the given String lookupPath. This is used when the HandlerMapping relies on String pattern matching with PathMatcher.
      Parameters:
      lookupPath - the path to match to
      Returns:
      the matched CacheControl, or null if no match

    • lookupCacheSeconds

      protected @Nullable Integer lookupCacheSeconds(PathContainer path)
      Find a cacheSeconds value for the given parsed path. This is used when the HandlerMapping uses parsed PathPatterns.
      Parameters:
      path - the path to match to
      Returns:
      the matched cacheSeconds, or null if there is no match
      Since:
      5.3

    • lookupCacheSeconds

      @Deprecated(since="7.0", forRemoval=true) protected @Nullable Integer lookupCacheSeconds(String lookupPath)
      Deprecated, for removal: This API element is subject to removal in a future version.
      use of PathMatcher and UrlPathHelper is deprecated for use at runtime in web modules in favor of parsed patterns with PathPatternParser.
      Find a cacheSeconds instance for the given String lookupPath. This is used when the HandlerMapping relies on String pattern matching with PathMatcher.
      Parameters:
      lookupPath - the path to match to
      Returns:
      the matched cacheSeconds, or null if there is no match

    • postHandle

      public void postHandle(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView) throws Exception
      This implementation is empty.
      Specified by:
      postHandle in interface HandlerInterceptor
      Parameters:
      request - current HTTP request
      response - current HTTP response
      handler - the handler (or HandlerMethod) that started asynchronous execution, for type and/or instance examination
      modelAndView - the ModelAndView that the handler returned (can also be null)
      Throws:
      Exception - in case of errors

    • afterCompletion

      public void afterCompletion(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response, Object handler, @Nullable Exception ex) throws Exception
      This implementation is empty.
      Specified by:
      afterCompletion in interface HandlerInterceptor
      Parameters:
      request - current HTTP request
      response - current HTTP response
      handler - the handler (or HandlerMethod) that started asynchronous execution, for type and/or instance examination
      ex - any exception thrown on handler execution, if any; this does not include exceptions that have been handled through an exception resolver
      Throws:
      Exception - in case of errors