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WebActivityFilter.java
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WebActivityFilter.java
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/*
* Copyright (c) 2008-2024 The Aspectran Project
*
* 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 com.aspectran.web.servlet.filter;
import com.aspectran.core.context.ActivityContext;
import com.aspectran.utils.ObjectUtils;
import com.aspectran.utils.StringUtils;
import com.aspectran.utils.annotation.jsr305.NonNull;
import com.aspectran.utils.logging.Logger;
import com.aspectran.utils.logging.LoggerFactory;
import com.aspectran.utils.wildcard.WildcardPattern;
import com.aspectran.web.service.DefaultServletHttpRequestHandler;
import com.aspectran.web.service.WebService;
import com.aspectran.web.support.util.WebUtils;
import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.FilterConfig;
import jakarta.servlet.ServletContext;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* The Class WebActivityFilter.
*/
public class WebActivityFilter implements Filter {
private static final Logger logger = LoggerFactory.getLogger(WebActivityFilter.class);
private static final String BYPASS_PATTERN_DELIMITERS = ",;\t\r\n\f";
private FilterConfig filterConfig;
private List<WildcardPattern> bypassPatterns;
private DefaultServletHttpRequestHandler defaultServletHttpRequestHandler;
@Override
public void init(@NonNull FilterConfig filterConfig) {
this.filterConfig = filterConfig;
String bypassesParam = filterConfig.getInitParameter("bypasses");
if (bypassesParam != null) {
String[] bypasses = StringUtils.tokenize(bypassesParam, BYPASS_PATTERN_DELIMITERS, true);
if (bypasses.length > 0) {
List<WildcardPattern> bypassPatterns = new ArrayList<>(bypasses.length);
for (String path : bypasses) {
bypassPatterns.add(WildcardPattern.compile(path, ActivityContext.NAME_SEPARATOR_CHAR));
}
ServletContext servletContext = filterConfig.getServletContext();
WebService webService = WebService.getDefaultWebService(servletContext);
DefaultServletHttpRequestHandler defaultHandler = new DefaultServletHttpRequestHandler(servletContext, webService);
defaultHandler.lookupDefaultServletName();
if (logger.isDebugEnabled()) {
for (WildcardPattern pattern : bypassPatterns) {
logger.debug(pattern + " is bypassed by " + getMyName() + " to servlet '" +
defaultHandler.getDefaultServletName() + "'");
}
}
this.bypassPatterns = bypassPatterns;
this.defaultServletHttpRequestHandler = defaultHandler;
}
}
logger.info("Initialized " + getMyName());
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
if (request instanceof HttpServletRequest httpRequest && response instanceof HttpServletResponse httpResponse) {
if (bypassPatterns != null) {
String requestName = WebUtils.getRelativePath(httpRequest.getContextPath(), httpRequest.getRequestURI());
for (WildcardPattern pattern : bypassPatterns) {
if (pattern.matches(requestName)) {
if (defaultServletHttpRequestHandler.handleRequest(httpRequest, httpResponse)) {
return;
}
}
}
}
}
chain.doFilter(request, response);
}
@Override
public void destroy() {
logger.info("Destroyed " + getMyName());
}
@NonNull
private String getMyName() {
return ObjectUtils.simpleIdentityToString(this, filterConfig.getFilterName());
}
}