javax.servlet.jsp.jstl.core.Config 使用代码案例

/** 
 * This method looks for a "locale" request parameter. If it finds one, it sets it as the preferred locale and also configures it to work with JSTL.
 * @param request the current request
 * @param response the current response
 * @param chain the chain
 * @throws IOException when something goes wrong
 * @throws ServletException when a communication failure happens
 */
@Override @SuppressWarnings("unchecked") public void doFilterInternal(HttpServletRequest request,final HttpServletResponse response,final FilterChain chain) throws IOException, ServletException {
  final String locale=request.getParameter("locale");
  Locale preferredLocale=null;
  if (locale != null) {
    final int indexOfUnderscore=locale.indexOf(‘_‘);
    if (indexOfUnderscore != -1) {
      final String language=locale.substring(0,indexOfUnderscore);
      final String country=locale.substring(indexOfUnderscore + 1);
      preferredLocale=new Locale(language,country);
    }
 else {
      preferredLocale=new Locale(locale);
    }
  }
  final HttpSession session=request.getSession(false);
  if (session != null) {
    if (preferredLocale == null) {
      preferredLocale=(Locale)session.getAttribute(Constants.PREFERRED_LOCALE_KEY);
    }
 else {
      session.setAttribute(Constants.PREFERRED_LOCALE_KEY,preferredLocale);
      Config.set(session,Config.FMT_LOCALE,preferredLocale);
    }
    if ((preferredLocale != null) && !(request instanceof LocaleRequestWrapper)) {
      request=new LocaleRequestWrapper(request,preferredLocale);
      LocaleContextHolder.setLocale(preferredLocale);
    }
  }
  final String theme=request.getParameter("theme");
  if ((theme != null) && request.isUserInRole(Constants.ADMIN_ROLE)) {
    final Map<String,Object> config=(Map)this.getServletContext().getAttribute(Constants.CONFIG);
    config.put(Constants.CSS_THEME,theme);
  }
  chain.doFilter(request,response);
  LocaleContextHolder.setLocaleContext(null);
}
 

/** 
 * Test jstl locale is set.
 * @throws Exception the exception
 */
public void testJstlLocaleIsSet() throws Exception {
  final MockHttpServletRequest request=new MockHttpServletRequest();
  request.addParameter("locale","es");
  final MockHttpServletResponse response=new MockHttpServletResponse();
  request.setSession(new MockHttpSession(null));
  this.filter.doFilter(request,response,new MockFilterChain());
  Assert.assertNotNull(Config.get(request.getSession(),Config.FMT_LOCALE));
}
 

/** 
 * This method looks for a "locale" request parameter. If it finds one, it sets it as the preferred locale and also configures it to work with JSTL.
 * @param request the current request
 * @param response the current response
 * @param chain the chain
 * @throws IOException when something goes wrong
 * @throws ServletException when a communication failure happens
 */
@SuppressWarnings("unchecked") public void doFilterInternal(HttpServletRequest request,HttpServletResponse response,FilterChain chain) throws IOException, ServletException {
  String locale=request.getParameter("locale");
  Locale preferredLocale=null;
  if (locale != null) {
    int indexOfUnderscore=locale.indexOf(‘_‘);
    if (indexOfUnderscore != -1) {
      String language=locale.substring(0,indexOfUnderscore);
      String country=locale.substring(indexOfUnderscore + 1);
      preferredLocale=new Locale(language,country);
    }
 else {
      preferredLocale=new Locale(locale);
    }
  }
  HttpSession session=request.getSession(false);
  if (session != null) {
    if (preferredLocale == null) {
      preferredLocale=(Locale)session.getAttribute(Constants.PREFERRED_LOCALE_KEY);
    }
 else {
      session.setAttribute(Constants.PREFERRED_LOCALE_KEY,preferredLocale);
      Config.set(session,Config.FMT_LOCALE,preferredLocale);
    }
    if (preferredLocale != null && !(request instanceof LocaleRequestWrapper)) {
      request=new LocaleRequestWrapper(request,preferredLocale);
      LocaleContextHolder.setLocale(preferredLocale);
    }
  }
  chain.doFilter(request,response);
  LocaleContextHolder.setLocaleContext(null);
}
 

public void testJstlLocaleIsSet() throws Exception {
  MockHttpServletRequest request=new MockHttpServletRequest();
  request.addParameter("locale","es");
  MockHttpServletResponse response=new MockHttpServletResponse();
  request.setSession(new MockHttpSession(null));
  filter.doFilter(request,response,new MockFilterChain());
  assertNotNull(Config.get(request.getSession(),Config.FMT_LOCALE));
}
 

/** 
 * This method looks for a "locale" request parameter. If it finds one, it sets it as the preferred locale and also configures it to work with JSTL.
 * @param request the current request
 * @param response the current response
 * @param chain the chain
 * @throws IOException when something goes wrong
 * @throws ServletException when a communication failure happens
 */
@SuppressWarnings("unchecked") public void doFilterInternal(HttpServletRequest request,HttpServletResponse response,FilterChain chain) throws IOException, ServletException {
  String locale=request.getParameter("locale");
  Locale preferredLocale=null;
  if (locale != null) {
    int indexOfUnderscore=locale.indexOf(‘_‘);
    if (indexOfUnderscore != -1) {
      String language=locale.substring(0,indexOfUnderscore);
      String country=locale.substring(indexOfUnderscore + 1);
      preferredLocale=new Locale(language,country);
    }
 else {
      preferredLocale=new Locale(locale);
    }
  }
  HttpSession session=request.getSession(false);
  if (session != null) {
    if (preferredLocale == null) {
      preferredLocale=(Locale)session.getAttribute(Constants.PREFERRED_LOCALE_KEY);
    }
 else {
      session.setAttribute(Constants.PREFERRED_LOCALE_KEY,preferredLocale);
      Config.set(session,Config.FMT_LOCALE,preferredLocale);
    }
    if (preferredLocale != null && !(request instanceof LocaleRequestWrapper)) {
      request=new LocaleRequestWrapper(request,preferredLocale);
      LocaleContextHolder.setLocale(preferredLocale);
    }
  }
  String theme=request.getParameter("theme");
  if (theme != null && request.isUserInRole(Constants.ADMIN_ROLE)) {
    Map<String,Object> config=(Map)getServletContext().getAttribute(Constants.CONFIG);
    config.put(Constants.CSS_THEME,theme);
  }
  chain.doFilter(request,response);
  LocaleContextHolder.setLocaleContext(null);
}
 

public void testJstlLocaleIsSet() throws Exception {
  MockHttpServletRequest request=new MockHttpServletRequest();
  request.addParameter("locale","es");
  MockHttpServletResponse response=new MockHttpServletResponse();
  request.setSession(new MockHttpSession(null));
  filter.doFilter(request,response,new MockFilterChain());
  assertNotNull(Config.get(request.getSession(),Config.FMT_LOCALE));
}
 

public String render(String viewName,Map<String,Object> modelMap,Locale locale) throws IOException {
  String result=null;
  if (locale == null) {
    locale=Locale.getDefault();
  }
  StringWriter sout=new StringWriter();
  StringBuffer sbuffer=sout.getBuffer();
  HttpServletRequest request=new MockIncludedHttpServletRequest();
  HttpServletResponse response=new MockHttpServletResponse();
  HttpServletResponse swallowingResponse=new SwallowingHttpServletResponse(response,sout,"UTF-8");
  LocaleResolver localeResolver=new JspLocaleResolver();
  localeResolver.setLocale(request,swallowingResponse,locale);
  try {
    addModelAsRequestAttributes(request,modelMap);
    request.setAttribute(DispatcherServlet.LOCALE_RESOLVER_ATTRIBUTE,localeResolver);
    LocalizationContext localizationContext=new LocalizationContext(null,locale);
    request.setAttribute(Config.FMT_LOCALIZATION_CONTEXT + ".request",localizationContext);
    request.setAttribute(Config.FMT_LOCALE,locale);
    swallowingResponse.setContentType("text/html; charset=utf-8");
    RequestDispatcher dispatcher=servletContext.getRequestDispatcher(viewResolver.urlForView(viewName));
    dispatcher.include(request,swallowingResponse);
    result=sbuffer.toString();
  }
 catch (  Exception e) {
    throw new IOException(e);
  }
  return result;
}
 

protected void doDSPost(Context context,HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException, SQLException, AuthorizeException {
  String netid=request.getParameter("login_netid");
  String password=request.getParameter("login_password");
  String jsp=null;
  int status=AuthenticationManager.authenticate(context,netid,password,null,request);
  if (status == AuthenticationMethod.SUCCESS) {
    Authenticate.loggedIn(context,request,context.getCurrentUser());
    Locale epersonLocale=I18nUtil.getEPersonLocale(context.getCurrentUser());
    context.setCurrentLocale(epersonLocale);
    Config.set(request.getSession(),Config.FMT_LOCALE,epersonLocale);
    log.info(LogManager.getHeader(context,"login","type=explicit"));
    Authenticate.resumeInterruptedRequest(request,response);
    return;
  }
 else   if (status == AuthenticationMethod.CERT_REQUIRED) {
    jsp="/error/require-certificate.jsp";
  }
 else {
    jsp="/login/incorrect.jsp";
  }
  log.info(LogManager.getHeader(context,"failed_login","netid=" + netid + ", result="+ String.valueOf(status)));
  JSPManager.showJSP(request,response,jsp);
}
 

protected void doDSPost(Context context,HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException, SQLException, AuthorizeException {
  String email=request.getParameter("login_email");
  String password=request.getParameter("login_password");
  String jsp=null;
  int status=AuthenticationManager.authenticate(context,email,password,null,request);
  if (status == AuthenticationMethod.SUCCESS) {
    Authenticate.loggedIn(context,request,context.getCurrentUser());
    Locale epersonLocale=I18nUtil.getEPersonLocale(context.getCurrentUser());
    context.setCurrentLocale(epersonLocale);
    Config.set(request.getSession(),Config.FMT_LOCALE,epersonLocale);
    log.info(LogManager.getHeader(context,"login","type=explicit"));
    Authenticate.resumeInterruptedRequest(request,response);
    return;
  }
 else   if (status == AuthenticationMethod.CERT_REQUIRED)   jsp="/error/require-certificate.jsp";
 else   jsp="/login/incorrect.jsp";
  log.info(LogManager.getHeader(context,"failed_login","email=" + email + ", result="+ String.valueOf(status)));
  JSPManager.showJSP(request,response,jsp);
}
 

/** 
 * Store information about the current user in the request and context
 * @param context DSpace context
 * @param request HTTP request
 * @param eperson the eperson logged in
 */
public static void loggedIn(Context context,HttpServletRequest request,EPerson eperson){
  HttpSession session=request.getSession();
  if ((!session.isNew()) && (session.getAttribute("dspace.current.user.id") == null)) {
    Locale sessionLocale=UIUtil.getSessionLocale(request);
    if (ConfigurationManager.getBooleanProperty("webui.session.invalidate",true)) {
      session.invalidate();
    }
    session=request.getSession();
    if (sessionLocale != null) {
      Config.set(request.getSession(),Config.FMT_LOCALE,sessionLocale);
    }
  }
  context.setCurrentUser(eperson);
  boolean isAdmin=false;
  try {
    isAdmin=AuthorizeManager.isAdmin(context);
  }
 catch (  SQLException se) {
    log.warn("Unable to use AuthorizeManager " + se);
  }
 finally {
    request.setAttribute("is.admin",new Boolean(isAdmin));
  }
  request.setAttribute("dspace.current.user",eperson);
  session.setAttribute("dspace.current.user.id",new Integer(eperson.getID()));
  session.setAttribute("dspace.current.remote.addr",request.getRemoteAddr());
}
 

/** 
 * Log the user out
 * @param context DSpace context
 * @param request HTTP request
 */
public static void loggedOut(Context context,HttpServletRequest request){
  HttpSession session=request.getSession();
  context.setCurrentUser(null);
  request.removeAttribute("is.admin");
  request.removeAttribute("dspace.current.user");
  session.removeAttribute("dspace.current.user.id");
  Locale sessionLocale=UIUtil.getSessionLocale(request);
  if (ConfigurationManager.getBooleanProperty("webui.session.invalidate",true)) {
    session.invalidate();
  }
  if (sessionLocale != null) {
    Config.set(request.getSession(),Config.FMT_LOCALE,sessionLocale);
  }
}
 

/** 
 * Obtain a new context object. If a context object has already been created for this HTTP request, it is re-used, otherwise it is created. If a user has authenticated with the system, the current user of the context is set appropriately.
 * @param request the HTTP request
 * @return a context object
 */
public static Context obtainContext(HttpServletRequest request) throws SQLException {
  try {
    if (request.getCharacterEncoding() == null)     request.setCharacterEncoding(Constants.DEFAULT_ENCODING);
  }
 catch (  Exception e) {
    log.error("Unable to set encoding to UTF-8.",e);
  }
  Context c=(Context)request.getAttribute("dspace.context");
  if (c == null) {
    c=new Context();
    HttpSession session=request.getSession();
    Integer userID=(Integer)session.getAttribute("dspace.current.user.id");
    if (userID != null) {
      String remAddr=(String)session.getAttribute("dspace.current.remote.addr");
      if (remAddr != null && remAddr.equals(request.getRemoteAddr())) {
        EPerson e=EPerson.find(c,userID.intValue());
        Authenticate.loggedIn(c,request,e);
      }
 else {
        log.warn("POSSIBLE HIJACKED SESSION: request from " + request.getRemoteAddr() + " does not match original "+ "session address: "+ remAddr+ ". Authentication rejected.");
      }
    }
    int[] groupIDs=AuthenticationManager.getSpecialGroups(c,request);
    for (int i=0; i < groupIDs.length; i++) {
      c.setSpecialGroup(groupIDs[i]);
      log.debug("Adding Special Group id=" + String.valueOf(groupIDs[i]));
    }
    c.setExtraLogInfo("session_id=" + request.getSession().getId() + ":ip_addr="+ request.getRemoteAddr());
    request.setAttribute("dspace.context",c);
  }
  Locale sessionLocale=getSessionLocale(request);
  Config.set(request.getSession(),Config.FMT_LOCALE,sessionLocale);
  c.setCurrentLocale(sessionLocale);
  return c;
}
 

/** 
 * Get the Locale for a session according to the user‘s language selection or language preferences. Order of selection - language selected via UI - language as set by application - language browser default
 * @param request the request Object
 * @return supportedLocaleLocale supported by this DSpace Instance for this request
 */
public static Locale getSessionLocale(HttpServletRequest request){
  String paramLocale=request.getParameter("locale");
  Locale sessionLocale=null;
  Locale supportedLocale=null;
  if (paramLocale != null && paramLocale != "") {
    sessionLocale=new Locale(paramLocale);
  }
  if (sessionLocale == null) {
    HttpSession session=request.getSession();
    sessionLocale=(Locale)Config.get(session,Config.FMT_LOCALE);
  }
  if (sessionLocale == null) {
    sessionLocale=request.getLocale();
  }
  if (sessionLocale == null) {
    sessionLocale=I18nUtil.DEFAULTLOCALE;
  }
  supportedLocale=I18nUtil.getSupportedLocale(sessionLocale);
  return supportedLocale;
}
 

/** 
 * Select and set (if specified) the character encoding to be used to interpret request parameters for this request.
 * @param request The servlet request we are processing
 * @param result The servlet response we are creating
 * @param chain The filter chain we are processing
 * @exception IOException if an input/output error occurs
 * @exception ServletException if a servlet error occurs
 */
public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException, ServletException {
  if (ignore || (request.getCharacterEncoding() == null)) {
    String encoding=selectEncoding(request);
    if (encoding != null) {
      request.setCharacterEncoding(encoding);
    }
  }
  HttpSession session=((HttpServletRequest)request).getSession(true);
  Locale locale=(Locale)session.getAttribute(Globals.LOCALE_KEY);
  if (locale == null) {
    locale=request.getLocale();
  }
  Config.set(session,Config.FMT_LOCALE,locale);
  chain.doFilter(request,response);
}
 

protected void doDSPost(Context context,HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException, SQLException, AuthorizeException {
  String netid=request.getParameter("login_netid");
  String password=request.getParameter("login_password");
  String jsp=null;
  int status=AuthenticationManager.authenticate(context,netid,password,null,request);
  if (status == AuthenticationMethod.SUCCESS) {
    Authenticate.loggedIn(context,request,context.getCurrentUser());
    Locale epersonLocale=I18nUtil.getEPersonLocale(context.getCurrentUser());
    context.setCurrentLocale(epersonLocale);
    Config.set(request.getSession(),Config.FMT_LOCALE,epersonLocale);
    log.info(LogManager.getHeader(context,"login","type=explicit"));
    Authenticate.resumeInterruptedRequest(request,response);
    return;
  }
 else   if (status == AuthenticationMethod.CERT_REQUIRED) {
    jsp="/error/require-certificate.jsp";
  }
 else {
    jsp="/login/ldap-incorrect.jsp";
  }
  log.info(LogManager.getHeader(context,"failed_login","netid=" + netid + ", result="+ String.valueOf(status)));
  JSPManager.showJSP(request,response,jsp);
}
 

protected void doDSPost(Context context,HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException, SQLException, AuthorizeException {
  String email=request.getParameter("login_email");
  String password=request.getParameter("login_password");
  String jsp=null;
  int status=AuthenticationManager.authenticate(context,email,password,null,request);
  if (status == AuthenticationMethod.SUCCESS) {
    Authenticate.loggedIn(context,request,context.getCurrentUser());
    Locale epersonLocale=I18nUtil.getEPersonLocale(context.getCurrentUser());
    context.setCurrentLocale(epersonLocale);
    Config.set(request.getSession(),Config.FMT_LOCALE,epersonLocale);
    log.info(LogManager.getHeader(context,"login","type=explicit"));
    Authenticate.resumeInterruptedRequest(request,response);
    return;
  }
 else   if (status == AuthenticationMethod.CERT_REQUIRED) {
    jsp="/error/require-certificate.jsp";
  }
 else {
    jsp="/login/incorrect.jsp";
  }
  log.info(LogManager.getHeader(context,"failed_login","email=" + email + ", result="+ String.valueOf(status)));
  JSPManager.showJSP(request,response,jsp);
}
 

/** 
 * Store information about the current user in the request and context
 * @param context DSpace context
 * @param request HTTP request
 * @param eperson the eperson logged in
 */
public static void loggedIn(Context context,HttpServletRequest request,EPerson eperson){
  HttpSession session=request.getSession();
  if ((!session.isNew()) && (session.getAttribute("dspace.current.user.id") == null)) {
    Locale sessionLocale=UIUtil.getSessionLocale(request);
    RequestInfo requestInfo=(RequestInfo)session.getAttribute("interrupted.request.info");
    String requestUrl=(String)session.getAttribute("interrupted.request.url");
    if (ConfigurationManager.getBooleanProperty("webui.session.invalidate",true)) {
      session.invalidate();
    }
    session=request.getSession();
    if (sessionLocale != null) {
      Config.set(request.getSession(),Config.FMT_LOCALE,sessionLocale);
    }
    if (requestInfo != null && requestUrl != null) {
      session.setAttribute("interrupted.request.info",requestInfo);
      session.setAttribute("interrupted.request.url",requestUrl);
    }
  }
  context.setCurrentUser(eperson);
  boolean isAdmin=false;
  try {
    isAdmin=AuthorizeManager.isAdmin(context);
  }
 catch (  SQLException se) {
    log.warn("Unable to use AuthorizeManager " + se);
  }
 finally {
    request.setAttribute("is.admin",Boolean.valueOf(isAdmin));
  }
  request.setAttribute("dspace.current.user",eperson);
  session.setAttribute("dspace.current.user.id",Integer.valueOf(eperson.getID()));
  session.setAttribute("dspace.current.remote.addr",request.getRemoteAddr());
}
 

/** 
 * Log the user out
 * @param context DSpace context
 * @param request HTTP request
 */
public static void loggedOut(Context context,HttpServletRequest request){
  HttpSession session=request.getSession();
  context.setCurrentUser(null);
  request.removeAttribute("is.admin");
  request.removeAttribute("dspace.current.user");
  session.removeAttribute("dspace.current.user.id");
  Locale sessionLocale=UIUtil.getSessionLocale(request);
  if (ConfigurationManager.getBooleanProperty("webui.session.invalidate",true)) {
    session.invalidate();
  }
  if (sessionLocale != null) {
    Config.set(request.getSession(),Config.FMT_LOCALE,sessionLocale);
  }
}
 

/** 
 * Get the Locale for a session according to the user‘s language selection or language preferences. Order of selection - language selected via UI - language as set by application - language browser default
 * @param request the request Object
 * @return supportedLocaleLocale supported by this DSpace Instance for this request
 */
public static Locale getSessionLocale(HttpServletRequest request){
  String paramLocale=request.getParameter("locale");
  Locale sessionLocale=null;
  Locale supportedLocale=null;
  if (!StringUtils.isEmpty(paramLocale)) {
    sessionLocale=new Locale(paramLocale);
  }
  if (sessionLocale == null) {
    HttpSession session=request.getSession();
    sessionLocale=(Locale)Config.get(session,Config.FMT_LOCALE);
  }
  if (sessionLocale == null) {
    sessionLocale=request.getLocale();
  }
  if (sessionLocale == null) {
    sessionLocale=I18nUtil.DEFAULTLOCALE;
  }
  supportedLocale=I18nUtil.getSupportedLocale(sessionLocale);
  return supportedLocale;
}