/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 io.milton.servlet;
import java.io.File;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class StaticResourceFilter implements Filter {
private final Logger log = LoggerFactory.getLogger(StaticResourceFilter.class);
private FilterConfig filterConfig = null;
public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain)throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
String s = MiltonUtils.stripContext(req);
log.debug("url: " + s);
s = "WEB-INF/static/" + s;
log.debug("check path: " + s);
String path = filterConfig.getServletContext().getRealPath(s);
log.debug("real path: " + path);
File f = null;
if( path != null && path.length() > 0 ) {
f = new File(path);
}
if( f != null && f.exists() && !f.isDirectory() ) { // can't forward to a folder
log.debug("static file exists. forwarding..");
req.getRequestDispatcher(s).forward(request,response);
} else {
log.debug("static file does not exist, continuing chain..");
chain.doFilter(request,response);
}
}
public FilterConfig getFilterConfig() {
return (this.filterConfig);
}
public void destroy() {
}
public void init(FilterConfig filterConfig) {
this.filterConfig = filterConfig;
}
}