- Visual C++源码
- Visual Basic源码
- C++ Builder源码
- Java源码
- Delphi源码
- C/C++源码
- PHP源码
- Perl源码
- Python源码
- Asm源码
- Pascal源码
- Borland C++源码
- Others源码
- SQL源码
- VBScript源码
- JavaScript源码
- ASP/ASPX源码
- C#源码
- Flash/ActionScript源码
- matlab源码
- PowerBuilder源码
- LabView源码
- Flex源码
- MathCAD源码
- VBA源码
- IDL源码
- Lisp/Scheme源码
- VHDL源码
- Objective-C源码
- Fortran源码
- tcl/tk源码
- QT源码
WebContentInterceptor.java
上传用户:jiancairen
上传日期:2007-08-27
资源大小:26458k
文件大小:6k
源码类别:
Java编程
开发平台:
Java
- /*
- * Copyright 2002-2004 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.springframework.web.servlet.mvc;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.Map;
- import java.util.Properties;
- import javax.servlet.ServletException;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import org.springframework.util.PathMatcher;
- import org.springframework.web.servlet.HandlerInterceptor;
- import org.springframework.web.servlet.ModelAndView;
- import org.springframework.web.servlet.support.WebContentGenerator;
- import org.springframework.web.util.UrlPathHelper;
- /**
- * Interceptor that checks and prepares request and response. Checks for supported
- * methods and a required session, and applies the specified number of cache seconds.
- * See superclass bean properties for configuration options.
- *
- * <p>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.
- *
- * @author Juergen Hoeller
- * @since 27.11.2003
- * @see AbstractController
- */
- public class WebContentInterceptor extends WebContentGenerator implements HandlerInterceptor {
- private UrlPathHelper urlPathHelper = new UrlPathHelper();
- private Map cacheMappings = new HashMap();
- /**
- * Set if URL lookup should always use full path within current servlet
- * context. Else, the path within the current servlet mapping is used
- * if applicable (i.e. in the case of a ".../*" servlet mapping in web.xml).
- * Default is false.
- * <p>Only relevant for the "cacheMappings" setting.
- * @see #setCacheMappings
- * @see org.springframework.web.util.UrlPathHelper#setAlwaysUseFullPath
- */
- public void setAlwaysUseFullPath(boolean alwaysUseFullPath) {
- this.urlPathHelper.setAlwaysUseFullPath(alwaysUseFullPath);
- }
- /**
- * Set if context path and request URI should be URL-decoded.
- * Both are returned <i>undecoded</i> by the Servlet API,
- * in contrast to the servlet path.
- * <p>Uses either the request encoding or the default encoding according
- * to the Servlet spec (ISO-8859-1).
- * <p>Note: Setting this to true requires J2SE 1.4, as J2SE 1.3's
- * URLDecoder class does not offer a way to specify the encoding.
- * <p>Only relevant for the "cacheMappings" setting.
- * @see #setCacheMappings
- * @see org.springframework.web.util.UrlPathHelper#setUrlDecode
- */
- public void setUrlDecode(boolean urlDecode) {
- this.urlPathHelper.setUrlDecode(urlDecode);
- }
- /**
- * Set the UrlPathHelper to use for resolution of lookup paths.
- * <p>Use this to override the default UrlPathHelper with a custom subclass,
- * or to share common UrlPathHelper settings across multiple HandlerMappings
- * and MethodNameResolvers.
- * <p>Only relevant for the "cacheMappings" setting.
- * @see #setCacheMappings
- * @see org.springframework.web.servlet.handler.AbstractUrlHandlerMapping#setUrlPathHelper
- * @see org.springframework.web.servlet.mvc.multiaction.AbstractUrlMethodNameResolver#setUrlPathHelper
- */
- public void setUrlPathHelper(UrlPathHelper urlPathHelper) {
- this.urlPathHelper = urlPathHelper;
- }
- /**
- * Map specific URL paths to specific cache seconds.
- * <p>Overrides the default cache seconds setting of this interceptor.
- * Can specify "-1" to exclude an URL path from default caching.
- * @param cacheMappings a mapping between URL paths (as keys) and
- * cache seconds (as values, need to be integer-parsable)
- * @see #setCacheSeconds
- */
- public void setCacheMappings(Properties cacheMappings) {
- this.cacheMappings.clear();
- for (Iterator it = cacheMappings.keySet().iterator(); it.hasNext();) {
- String path = (String) it.next();
- this.cacheMappings.put(path, Integer.valueOf(cacheMappings.getProperty(path)));
- }
- }
- public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
- throws ServletException {
- String lookupPath = this.urlPathHelper.getLookupPathForRequest(request);
- if (logger.isDebugEnabled()) {
- logger.debug("Looking up cache seconds for [" + lookupPath + "]");
- }
- Integer cacheSeconds = lookupCacheSeconds(lookupPath);
- if (cacheSeconds != null) {
- if (logger.isDebugEnabled()) {
- logger.debug("Applying " + cacheSeconds + " cache seconds to [" + lookupPath + "]");
- }
- checkAndPrepare(request, response, cacheSeconds.intValue(), handler instanceof LastModified);
- }
- else {
- if (logger.isDebugEnabled()) {
- logger.debug("Applying default cache seconds to [" + lookupPath + "]");
- }
- checkAndPrepare(request, response, handler instanceof LastModified);
- }
- return true;
- }
- /**
- * Look up a cache seconds value for the given URL path.
- * <p>Supports direct matches, e.g. a registered "/test" matches "/test",
- * and various Ant-style pattern matches, e.g. a registered "/t*" matches
- * both "/test" and "/team". For details, see the PathMatcher class.
- * @param urlPath URL the bean is mapped to
- * @return the associated cache seconds, or null if not found
- * @see org.springframework.util.PathMatcher
- */
- protected Integer lookupCacheSeconds(String urlPath) {
- // direct match?
- Integer cacheSeconds = (Integer) this.cacheMappings.get(urlPath);
- if (cacheSeconds == null) {
- // pattern match?
- for (Iterator it = this.cacheMappings.keySet().iterator(); it.hasNext();) {
- String registeredPath = (String) it.next();
- if (PathMatcher.match(registeredPath, urlPath)) {
- cacheSeconds = (Integer) this.cacheMappings.get(registeredPath);
- }
- }
- }
- return cacheSeconds;
- }
- public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
- ModelAndView modelAndView) {
- }
- public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
- Exception ex) {
- }
- }