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SpaResourcesFilter.java
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SpaResourcesFilter.java
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/**
* This Source Code Form is subject to the terms of the Mozilla Public License,
* v. 2.0. If a copy of the MPL was not distributed with this file, You can
* obtain one at http://mozilla.org/MPL/2.0/. OpenMRS is also distributed under
* the terms of the Healthcare Disclaimer located at http://openmrs.org/license.
*
* Copyright (C) OpenMRS Inc. OpenMRS is a registered trademark and the OpenMRS
* graphic logo is a trademark of OpenMRS Inc.
*/
package org.openmrs.module.spa.filter;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openmrs.api.context.Context;
import org.openmrs.module.spa.utils.SpaModuleUtils;
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 java.io.IOException;
import java.util.regex.Pattern;
/**
* This is a filter class that handles all requests for the frontend static resources
* All requests with /frontend are handled by the class
*/
public class SpaResourcesFilter implements Filter {
private Log log = LogFactory.getLog(this.getClass());
@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
String spaResourceBasePath = Context.getAdministrationService().getGlobalProperty(SpaModuleUtils.GLOBAL_PROPERTY_FRONTEND_RESOURCE_BASE_URL,
SpaModuleUtils.DEFAULT_FRONTEND_RESOURCE_BASE_URL);
if (StringUtils.isBlank(spaResourceBasePath)) {
spaResourceBasePath = SpaModuleUtils.DEFAULT_FRONTEND_RESOURCE_BASE_URL;
}
String requestURL = null;
if (isFullBasePath(spaResourceBasePath)) {
requestURL = request.getRequestURL().toString();
} else {
requestURL = request.getServletPath();
}
if (requestURL.startsWith(spaResourceBasePath)) {
String newURL = requestURL.replaceFirst(Pattern.quote(spaResourceBasePath), "/ms/spa/spaModuleResources");
req.getRequestDispatcher(newURL).forward(req, res);
} else {
chain.doFilter(req, res);
}
}
//spaResourceBasePath can be either full path (must contain protocol) or relative servlet path
public static boolean isFullBasePath(String spaBasePath) {
return spaBasePath.contains("://");
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void destroy() {
}
}