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package com.kwoksys.framework.servlets;
import com.kwoksys.biz.ServiceProvider;
import com.kwoksys.biz.admin.AdminService;
import com.kwoksys.biz.admin.dto.AccessUser;
import com.kwoksys.biz.auth.AuthService;
import com.kwoksys.biz.auth.core.Access;
import com.kwoksys.biz.auth.core.AuthUtils;
import com.kwoksys.biz.auth.dto.AccessPage;
import com.kwoksys.biz.system.SystemService;
import com.kwoksys.biz.system.core.Localizer;
import com.kwoksys.biz.system.dto.SystemInfo;
import com.kwoksys.framework.common.RequestContext;
import com.kwoksys.framework.common.ResponseContext;
import com.kwoksys.framework.configs.ConfigManager;
import com.kwoksys.framework.configs.LogConfigManager;
import com.kwoksys.framework.exceptions.DatabaseException;
import com.kwoksys.framework.session.CacheManager;
import com.kwoksys.framework.session.CookieManager;
import com.kwoksys.framework.session.SessionManager;
import org.apache.struts.action.RequestProcessor;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.Enumeration;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Custom RequestProcessor.
*/
public class RequestProcessorServlet extends RequestProcessor {
private static final Logger logger = Logger.getLogger(RequestProcessorServlet.class.getName());
private SystemInfo systemInfo;
public void process(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
RequestContext requestContext = new RequestContext(request);
ResponseContext responseContext = new ResponseContext(response);
try {
// This line is required for utf-8 encoding to work.
request.setCharacterEncoding(ConfigManager.system.getCharacterEncoding());
// These lines are for making the app not to cache pages.
// Especially important for the AJAX to work correctly.
response.setHeader("Pragma", "no-cache"); // For HTTP/1.0 backward compatibility.
response.setHeader("Cache-Control", "no-cache"); // For HTTP/1.1.
((ServletRequest) response).setCharacterEncoding(ConfigManager.system.getCharacterEncoding());
// Pass pageStartTime to jsp pages.
request.setAttribute(RequestContext.PAGE_START_TIME, System.currentTimeMillis());
if (!validate(requestContext)) {
responseContext.sendServiceUnavailable();
return;
}
HttpSession session = request.getSession();
// Do this once for a session
initSession(session);
String requestPath = request.getRequestURI();
String pageName = request.getServletPath();
AccessPage accessPage = Access.getAccessPage(pageName);
Integer moduleId = accessPage == null ? 0 : accessPage.getModuleId();
request.setAttribute(RequestContext.PAGE_KEY, pageName);
request.setAttribute(RequestContext.MODULE_KEY, moduleId);
request.setAttribute(RequestContext.SYSDATE, systemInfo.getSysdate());
Cookie[] cookies = request.getCookies();
AccessUser user = Access.getCookieUser(cookies);
String sessionToken = CookieManager.getSessionToken(cookies).trim();
// Ready to serve the page, let's log it first.
logger.info(LogConfigManager.PAGE_REQUEST_PREFIX + " " + requestPath + ", user ID: " + user.getId());
AuthService authService = ServiceProvider.getAuthService(requestContext);
boolean isValidSessionToken = authService.isValidUserSession(user.getId(), sessionToken);
// Check if the session is valid
if (!isValidSessionToken) {
if (ConfigManager.auth.isBasicAuth()) {
if (!authService.isValidBasicAuthentication(user)) {
Access.requestBasicAuthCredential(requestContext, responseContext);
return;
} else {
// Initialize user session
authService.initializeUserSession(request, response, user);
}
} else if (user.isLoggedOn()) {
// If the user is already logged on, without a valid session token, empty auth cookies
AuthUtils.resetAuthCookies(response);
}
}
// This sounds un-necessary but during basic authentication, we could get a different id than
// what's stored in cookies.
AdminService adminService = ServiceProvider.getAdminService(requestContext);
user = adminService.getUser(user.getId());
request.setAttribute(RequestContext.USER_KEY, user);
if (Access.isPublicPage(pageName)) {
// No permission checking required for public pages.
} else if (accessPage == null) {
// We don't have such page, show a 404.
responseContext.sendNotFound();
return;
} else if (!Access.hasSpecialPagePermission(user, accessPage)) {
Access.forbidden(response);
return;
} else if (!isValidSessionToken && !ConfigManager.auth.isBasicAuth() && user.isLoggedOn()) {
Access.requestCredential(requestContext, responseContext, "sessionExpired");
return;
// We check whether the user is allowed to see pages that require permission.
} else if (!Access.hasPermission(user, pageName)) {
if (!user.isLoggedOn()) {
// Request username/password with error code loginRequired.
Access.requestCredential(requestContext, responseContext, "loginRequired");
return;
} else {
Access.forbidden(response);
return;
}
}
} catch (Exception e) {
// If there are errors with the request processor, don't go to the requested resource.
logger.log(Level.SEVERE, "Problem processing request filter.", e);
responseContext.sendServerError();
return;
}
try {
super.process(request, response);
} catch (Exception e) {
logger.log(Level.SEVERE, "Problem processing request.", e);
responseContext.sendServerError();
return;
}
}
private boolean validate(RequestContext requestContext) {
// Checks database availability by executing a query, also check to see if the current cache key matches
// cached cache key. This is for cache flushing across multiple servers.
SystemService systemService = ServiceProvider.getSystemService(requestContext);
if (!SystemInitServlet.init) {
logger.warning("System not initialized. " + SystemInitServlet.initError);
return false;
}
try {
systemInfo = systemService.getSystemInfo();
if (!systemInfo.getCacheKey().equals(ConfigManager.system.getCacheKey())) {
// Refresh the cache.
ConfigManager.init();
}
// Run a process to check if there are any caches to remove
new CacheManager(requestContext).checkRemoveCaches(systemInfo.getSysdate().getTime());
} catch (DatabaseException e) {
// Don't log anything
return false;
}
return true;
}
private static void initSession(HttpSession session) {
if (session.getAttribute(SessionManager.SESSION_INIT) == null) {
session.setAttribute(SessionManager.SESSION_INIT, true);
Localizer.setSessionLocale(session, ConfigManager.system.getLocaleString());
}
}
private static void printRequest(HttpServletRequest request) {
System.out.println("\n=== Headers ===");
Enumeration headerNames = request.getHeaderNames();
while (headerNames.hasMoreElements()) {
String name = (String)headerNames.nextElement();
System.out.println(name + ": " + request.getHeader(name));
}
System.out.println("\n=== Parameters ===");
Enumeration parameterNames = request.getParameterNames();
while (parameterNames.hasMoreElements()) {
String name = (String)parameterNames.nextElement();
System.out.println(name + ": " + request.getParameter(name));
}
}
} |
