Java tutorial
/** * Copyright 2002 Instituto Superior Tcnico * * This file is part of FenixEdu Core. * * FenixEdu Core is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * FenixEdu Core 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with FenixEdu Core. If not, see <http://www.gnu.org/licenses/>. */ package net.sourceforge.fenixedu.presentationTier.Action.externalServices.epfl; import java.io.IOException; import java.nio.charset.Charset; import java.util.Locale; import java.util.Set; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sourceforge.fenixedu.domain.ExternalUser; import net.sourceforge.fenixedu.domain.Photograph; import net.sourceforge.fenixedu.domain.person.RoleType; import net.sourceforge.fenixedu.domain.phd.PhdIndividualProgramProcess; import net.sourceforge.fenixedu.domain.phd.PhdIndividualProgramProcessNumber; import net.sourceforge.fenixedu.domain.phd.candidacy.PhdCandidacyReferee; import net.sourceforge.fenixedu.domain.phd.candidacy.PhdProgramPublicCandidacyHashCode; import net.sourceforge.fenixedu.presentationTier.Action.base.FenixAction; import net.sourceforge.fenixedu.presentationTier.Action.person.RetrievePersonalPhotoAction; import org.apache.commons.lang.StringUtils; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.fenixedu.bennu.core.domain.Bennu; import org.fenixedu.bennu.core.domain.User; import org.fenixedu.bennu.core.security.Authenticate; import org.fenixedu.commons.i18n.I18N; import pt.ist.fenixWebFramework.struts.annotations.Mapping; import pt.ist.fenixframework.FenixFramework; @Mapping(module = "external", path = "/epflCandidateInformation", scope = "request", validate = false) public class ExportPhdIndividualProgramProcessInformation extends FenixAction { @Override public ActionForward execute(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) throws Exception { setLocale(request, Locale.ENGLISH); I18N.setLocale(request.getSession(), Locale.ENGLISH); final ActionForward actionForward = checkPermissions(request, response); if (actionForward == null) { final String method = request.getParameter("method"); if (method == null || method.isEmpty() || method.equals("login")) { displayPresentationPage(request, response); } else if (method.equals("displayCandidatePage")) { displayCandidatePage(request, response); } else if (method.equals("displayRefereePage")) { displayRefereePage(request, response); } else if (method.equals("downloadCandidateDocuments")) { downloadCandidateDocuments(request, response); } else if (method.equals("displayPhoto")) { displayPhoto(request, response); } else if (method.equals("exportInformationXml")) { exportInformationXml(request, response); } } return actionForward; } private void displayPresentationPage(HttpServletRequest request, HttpServletResponse response) throws IOException { final byte[] presentationPage = ExportPhdIndividualProgramProcessesInHtml.exportPresentationPage(); writeResponse(response, presentationPage, "text/html"); } private void displayCandidatePage(HttpServletRequest request, HttpServletResponse response) throws IOException { final String hashCode = request.getParameter("process"); final PhdProgramPublicCandidacyHashCode code = (PhdProgramPublicCandidacyHashCode) PhdProgramPublicCandidacyHashCode .getPublicCandidacyCodeByHash(hashCode); final byte[] candidatePage = ExportPhdIndividualProgramProcessesInHtml.drawCandidatePage(code); writeResponse(response, candidatePage, "text/html"); } private void displayRefereePage(HttpServletRequest request, HttpServletResponse response) throws IOException { final String refereeOid = request.getParameter("refereeOid"); final int count = Integer.parseInt(request.getParameter("count")); final PhdCandidacyReferee referee = FenixFramework.getDomainObject(refereeOid); final byte[] refereePage = ExportPhdIndividualProgramProcessesInHtml.drawLetter(referee, count); writeResponse(response, refereePage, "text/html"); } private void downloadCandidateDocuments(HttpServletRequest request, HttpServletResponse response) throws IOException { final String candidateOid = request.getParameter("candidateOid"); final PhdProgramPublicCandidacyHashCode code = FenixFramework.getDomainObject(candidateOid); final byte[] documents = ExportPhdIndividualProgramProcessesInHtml.createZip(code); final String email = code.getEmail().substring(0, code.getEmail().indexOf("@")); final String documentName = email + "-documents.zip"; response.addHeader("Content-Disposition", "attachment; filename=" + documentName); writeResponse(response, documents, "application/zip"); } private void displayPhoto(final HttpServletRequest request, final HttpServletResponse response) { final String photoOid = request.getParameter("photoOid"); if (photoOid == null || photoOid.isEmpty()) { RetrievePersonalPhotoAction.writeUnavailablePhoto(response, getServlet()); } else { final Photograph photo = FenixFramework.getDomainObject(photoOid); RetrievePersonalPhotoAction.writePhoto(response, photo); } } private void exportInformationXml(final HttpServletRequest request, final HttpServletResponse response) throws Exception { response.addHeader("Content-Disposition", "attachment; filename=epfl.xml"); response.setContentType(Charset.defaultCharset().name()); final byte[] content = ExportEPFLPhdProgramCandidacies.run(); writeResponse(response, content, "application/xml"); } private void writeResponse(HttpServletResponse response, final byte[] presentationPage, final String contentType) throws IOException { final ServletOutputStream outputStream = response.getOutputStream(); response.setContentType(contentType); outputStream.write(presentationPage); outputStream.close(); } private ActionForward checkPermissions(final HttpServletRequest request, final HttpServletResponse response) throws IOException { final User userView = Authenticate.getUser(); if (userView == null) { final String externalUser = (String) request.getSession().getAttribute(getClass().getName()); if (externalUser != null && !externalUser.isEmpty()) { return null; } final String username = get(request, "username"); if (username == null) { return displayLoginPage(request, response); } final String password = get(request, "password"); if (isValidExternalUser(username, password)) { request.getSession().setAttribute(getClass().getName(), username); return null; } } else if (userView.getPerson().hasRole(RoleType.MANAGER)) { return null; } return displayUnAuhtorizedPage(request, response); } private String get(final HttpServletRequest request, final String attribute) { final String parameter = request.getParameter(attribute); return parameter == null ? (String) request.getAttribute(attribute) : parameter; } private boolean isValidExternalUser(final String username, final String password) { return !StringUtils.isEmpty(username) && !StringUtils.isEmpty(password) && isValidExternalUserPassword(username, password); } private boolean isValidExternalUserPassword(final String username, final String password) { for (final ExternalUser externalUser : Bennu.getInstance().getExternalUserSet()) { if (externalUser.verify(username, password)) { return true; } } return false; } private ActionForward displayLoginPage(final HttpServletRequest request, final HttpServletResponse response) throws IOException { final String url = "http://fenix.ist.utl.pt/phd/epfl/applications/login"; return new ActionForward(url, true); } private ActionForward displayUnAuhtorizedPage(final HttpServletRequest request, final HttpServletResponse response) throws IOException { final String url = "http://fenix.ist.utl.pt/phd/epfl/applications/notAuthorized"; return new ActionForward(url, true); } private PhdIndividualProgramProcess readProcessByNumber(int year, String number) { Set<PhdIndividualProgramProcessNumber> processList = PhdIndividualProgramProcessNumber.readByYear(year); for (PhdIndividualProgramProcessNumber process : processList) { if (process.getNumber().toString().equals(number)) { return process.getProcess(); } } return null; } }