spring security RequestCacheAwareFilter 源码
spring security RequestCacheAwareFilter 代码
文件路径：/web/src/main/java/org/springframework/security/web/savedrequest/RequestCacheAwareFilter.java
/*
* Copyright 2002-2016 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
*
* https://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.security.web.savedrequest;
import java.io.IOException;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.util.Assert;
import org.springframework.web.filter.GenericFilterBean;
/**
* Responsible for reconstituting the saved request if one is cached and it matches the
* current request.
* <p>
* It will call
* {@link RequestCache#getMatchingRequest(HttpServletRequest, HttpServletResponse)
* getMatchingRequest} on the configured <tt>RequestCache</tt>. If the method returns a
* value (a wrapper of the saved request), it will pass this to the filter chain's
* <tt>doFilter</tt> method. If null is returned by the cache, the original request is
* used and the filter has no effect.
*
* @author Luke Taylor
* @since 3.0
*/
public class RequestCacheAwareFilter extends GenericFilterBean {
private RequestCache requestCache;
public RequestCacheAwareFilter() {
this(new HttpSessionRequestCache());
}
public RequestCacheAwareFilter(RequestCache requestCache) {
Assert.notNull(requestCache, "requestCache cannot be null");
this.requestCache = requestCache;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest wrappedSavedRequest = this.requestCache.getMatchingRequest((HttpServletRequest) request,
(HttpServletResponse) response);
chain.doFilter((wrappedSavedRequest != null) ? wrappedSavedRequest : request, response);
}
}
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