Java tutorial
/* * eGov suite of products aim to improve the internal efficiency,transparency, * accountability and the service delivery of the government organizations. * * Copyright (C) <2015> eGovernments Foundation * * The updated version of eGov suite of products as by eGovernments Foundation * is available at http://www.egovernments.org * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see http://www.gnu.org/licenses/ or * http://www.gnu.org/licenses/gpl.html . * * In addition to the terms of the GPL license to be adhered to in using this * program, the following additional terms are to be complied with: * * 1) All versions of this program, verbatim or modified must carry this * Legal Notice. * * 2) Any misrepresentation of the origin of the material is prohibited. It * is required that all modified versions of this material be marked in * reasonable ways as different from the original version. * * 3) This license does not grant any rights to any user of the program * with regards to rights under trademark law for use of the trade names * or trademarks of eGovernments Foundation. * * In case of any queries, you can reach eGovernments Foundation at contact@egovernments.org. */ package org.egov.restapi.filter; import net.sf.json.JSONObject; import org.apache.commons.lang3.StringUtils; import org.apache.log4j.Logger; import org.egov.commons.entity.Source; import org.egov.infra.admin.master.entity.City; import org.egov.infra.admin.master.service.CityService; import org.egov.infra.config.core.ApplicationThreadLocals; import org.egov.infra.exception.ApplicationRuntimeException; import org.egov.restapi.config.properties.RestAPIApplicationProperties; import org.egov.restapi.constants.RestRedirectConstants; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.HttpHeaders; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletInputStream; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import java.io.IOException; import java.util.List; //This is an unnecessary class, the existence of this filter is due to customer is not ready to //change their existing system to call appropriate url from their apps. public class ApiFilter implements Filter { private final static Logger LOG = Logger.getLogger(ApiFilter.class); private static final String SOURCE = "source"; @Autowired private CityService cityService; @Autowired private RestAPIApplicationProperties restAPIApplicationProperties; @Override public void destroy() { } @Override public void doFilter(final ServletRequest servletRequest, final ServletResponse servletResponse, final FilterChain filterChain) throws IOException, ServletException { final MultiReadHttpServletRequest multiReadRequest = new MultiReadHttpServletRequest( (HttpServletRequest) servletRequest); if (!validateRequest(multiReadRequest)) throw new ApplicationRuntimeException("RESTAPI.001"); String ulbCode = null; final byte[] b = new byte[5000]; ulbCode = servletRequest.getParameter("ulbCode"); if (ulbCode == null) { JSONObject jsonObject = null; String jb = new String(); try { final ServletInputStream inputStream = multiReadRequest.getInputStream(); inputStream.read(b); jb = new String(b); } catch (final Exception e) { // Throw error } try { jsonObject = JSONObject.fromObject(jb.toString()); } catch (final Exception e) { throw new RuntimeException("Invalid Json"); } if (jsonObject != null) ulbCode = jsonObject.getString("ulbCode"); else throw new RuntimeException("Invalid Json ULB Code is not Passed"); } if (StringUtils.isNotBlank(ulbCode)) { if (!ulbCode.equals(ApplicationThreadLocals.getCityCode())) { LOG.info("Request Reached Different city. Need to change domain details"); final String cityName = RestRedirectConstants.getCode_ulbNames().get(ulbCode).toLowerCase(); ApplicationThreadLocals.setTenantID(cityName); final City city = cityService.getCityByCode(ulbCode); ApplicationThreadLocals.setDomainName(city.getDomainURL()); ApplicationThreadLocals.setCityCode(ulbCode); } else LOG.info("ULB code resolved to be same, continueing normal request flow"); } else { LOG.error("ULB Code missing in request"); throw new ApplicationRuntimeException("ULB Code missing in request"); } filterChain.doFilter(multiReadRequest, servletResponse); } @Override public void init(final FilterConfig arg0) throws ServletException { } private boolean validateRequest(final MultiReadHttpServletRequest httpServletRequest) { final String referer = httpServletRequest.getHeader(HttpHeaders.REFERER); if (LOG.isInfoEnabled()) { LOG.info("The calling request URL:referer= " + referer); LOG.info("Host = " + httpServletRequest.getHeader("Host")); LOG.info("X-Forwarded-For = " + httpServletRequest.getHeader("X-Forwarded-For")); LOG.info("RequestURL = " + httpServletRequest.getRequestURL()); LOG.info("X-RemoteHost = " + httpServletRequest.getRequest().getRemoteHost()); } final List<String> apOnlineIpAddress = restAPIApplicationProperties.aponlineIPAddress(); final List<String> esevaIpAddress = restAPIApplicationProperties.esevaIPAddress(); final List<String> softtechIpAddress = restAPIApplicationProperties.softtechIPAddress(); if (apOnlineIpAddress != null && referer != null) for (final String aponlineIp : apOnlineIpAddress) if (!aponlineIp.equals("") && referer.contains(aponlineIp)) { httpServletRequest.getSession().setAttribute(SOURCE, Source.APONLINE); return true; } if (esevaIpAddress != null && referer != null) for (final String esevaIp : esevaIpAddress) if (!esevaIp.equals("") && referer.contains(esevaIp)) { httpServletRequest.getSession().setAttribute(SOURCE, Source.ESEVA); return true; } if (softtechIpAddress != null && referer != null) for (final String Ip : softtechIpAddress) if (!Ip.equals("") && referer.contains(Ip)) { httpServletRequest.getSession().setAttribute(SOURCE, Source.SOFTTECH); return true; } return false; } }