+++ /dev/null
-/*
- * Sone - FreenetTemplatePage.java - Copyright © 2010–2016 David Roden
- *
- * 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
- * (at your option) 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/>.
- */
-
-package net.pterodactylus.sone.web.page;
-
-import static java.lang.String.format;
-import static java.util.logging.Logger.getLogger;
-
-import java.io.IOException;
-import java.io.StringWriter;
-import java.net.URI;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import net.pterodactylus.util.template.Template;
-import net.pterodactylus.util.template.TemplateContext;
-import net.pterodactylus.util.template.TemplateContextFactory;
-import net.pterodactylus.util.web.Method;
-import net.pterodactylus.util.web.Page;
-import net.pterodactylus.util.web.RedirectResponse;
-import net.pterodactylus.util.web.Response;
-import freenet.clients.http.LinkEnabledCallback;
-import freenet.clients.http.PageMaker;
-import freenet.clients.http.PageNode;
-import freenet.clients.http.ToadletContext;
-import freenet.support.HTMLNode;
-
-/**
- * Base class for all {@link Page}s that are rendered with {@link Template}s and
- * fit into Freenet’s web interface.
- *
- * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
- */
-public class FreenetTemplatePage implements FreenetPage, LinkEnabledCallback {
-
- /** The logger. */
- private static final Logger logger = getLogger(FreenetTemplatePage.class.getName());
-
- /** The path of the page. */
- private final String path;
-
- /** The template context factory. */
- private final TemplateContextFactory templateContextFactory;
-
- /** The template to render. */
- private final Template template;
-
- /** Where to redirect for invalid form passwords. */
- private final String invalidFormPasswordRedirectTarget;
-
- /**
- * Creates a new template page.
- *
- * @param path
- * The path of the page
- * @param templateContextFactory
- * The template context factory
- * @param template
- * The template to render
- * @param invalidFormPasswordRedirectTarget
- * The target to redirect to if a POST request does not contain
- * the correct form password
- */
- public FreenetTemplatePage(String path, TemplateContextFactory templateContextFactory, Template template, String invalidFormPasswordRedirectTarget) {
- this.path = path;
- this.templateContextFactory = templateContextFactory;
- this.template = template;
- this.invalidFormPasswordRedirectTarget = invalidFormPasswordRedirectTarget;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public String getPath() {
- return path;
- }
-
- /**
- * Returns the title of the page.
- *
- * @param request
- * The request to serve
- * @return The title of the page
- */
- @SuppressWarnings("static-method")
- protected String getPageTitle(FreenetRequest request) {
- return null;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public boolean isPrefixPage() {
- return false;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public final Response handleRequest(FreenetRequest request, Response response) throws IOException {
- String redirectTarget = getRedirectTarget(request);
- if (redirectTarget != null) {
- return new RedirectResponse(redirectTarget);
- }
-
- if (isFullAccessOnly() && !request.getToadletContext().isAllowedFullAccess()) {
- return response.setStatusCode(401).setStatusText("Not authorized").setContentType("text/html");
- }
- ToadletContext toadletContext = request.getToadletContext();
- if (request.getMethod() == Method.POST) {
- /* require form password. */
- String formPassword = request.getHttpRequest().getPartAsStringFailsafe("formPassword", 32);
- if (!formPassword.equals(toadletContext.getContainer().getFormPassword())) {
- return new RedirectResponse(invalidFormPasswordRedirectTarget);
- }
- }
- PageMaker pageMaker = toadletContext.getPageMaker();
- PageNode pageNode = pageMaker.getPageNode(getPageTitle(request), toadletContext);
- for (String styleSheet : getStyleSheets()) {
- pageNode.addCustomStyleSheet(styleSheet);
- }
- for (Map<String, String> linkNodeParameters : getAdditionalLinkNodes(request)) {
- HTMLNode linkNode = pageNode.headNode.addChild("link");
- for (Entry<String, String> parameter : linkNodeParameters.entrySet()) {
- linkNode.addAttribute(parameter.getKey(), parameter.getValue());
- }
- }
- String shortcutIcon = getShortcutIcon();
- if (shortcutIcon != null) {
- pageNode.addForwardLink("icon", shortcutIcon);
- }
-
- TemplateContext templateContext = templateContextFactory.createTemplateContext();
- templateContext.mergeContext(template.getInitialContext());
- try {
- long start = System.nanoTime();
- processTemplate(request, templateContext);
- long finish = System.nanoTime();
- logger.log(Level.FINEST, format("Template was rendered in %.2fms.", (finish - start) / 1000000.0));
- } catch (RedirectException re1) {
- return new RedirectResponse(re1.getTarget());
- }
-
- StringWriter stringWriter = new StringWriter();
- template.render(templateContext, stringWriter);
- pageNode.content.addChild("%", stringWriter.toString());
-
- postProcess(request, templateContext);
-
- return response.setStatusCode(200).setStatusText("OK").setContentType("text/html").write(pageNode.outer.generate());
- }
-
- /**
- * Can be overridden to return a custom set of style sheets that are to be
- * included in the page’s header.
- *
- * @return Additional style sheets to load
- */
- @SuppressWarnings("static-method")
- protected Collection<String> getStyleSheets() {
- return Collections.emptySet();
- }
-
- /**
- * Returns the name of the shortcut icon to include in the page’s header.
- *
- * @return The URL of the shortcut icon, or {@code null} for no icon
- */
- @SuppressWarnings("static-method")
- protected String getShortcutIcon() {
- return null;
- }
-
- /**
- * Can be overridden when extending classes need to set variables in the
- * template before it is rendered.
- *
- * @param request
- * The request that is rendered
- * @param templateContext
- * The template context to set variables in
- * @throws RedirectException
- * if the processing page wants to redirect after processing
- */
- protected void processTemplate(FreenetRequest request, TemplateContext templateContext) throws RedirectException {
- /* do nothing. */
- }
-
- /**
- * This method will be called after
- * {@link #processTemplate(FreenetRequest, TemplateContext)} has processed
- * the template and the template was rendered. This method will not be
- * called if {@link #processTemplate(FreenetRequest, TemplateContext)}
- * throws a {@link RedirectException}!
- *
- * @param request
- * The request being processed
- * @param templateContext
- * The template context that supplied the rendered data
- */
- protected void postProcess(FreenetRequest request, TemplateContext templateContext) {
- /* do nothing. */
- }
-
- /**
- * Can be overridden to redirect the user to a different page, in case a log
- * in is required, or something else is wrong.
- *
- * @param request
- * The request that is processed
- * @return The URL to redirect to, or {@code null} to not redirect
- */
- @SuppressWarnings("static-method")
- protected String getRedirectTarget(FreenetRequest request) {
- return null;
- }
-
- /**
- * Returns additional <link> nodes for the HTML’s <head> node.
- *
- * @param request
- * The request for which to return the link nodes
- * @return All link nodes that should be added to the HTML head
- */
- @SuppressWarnings("static-method")
- protected List<Map<String, String>> getAdditionalLinkNodes(FreenetRequest request) {
- return Collections.emptyList();
- }
-
- /**
- * Returns whether this page should only be allowed for requests from hosts
- * with full access.
- *
- * @return {@code true} if this page should only be allowed for hosts with
- * full access, {@code false} to allow this page for any host
- */
- @SuppressWarnings("static-method")
- protected boolean isFullAccessOnly() {
- return false;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public boolean isLinkExcepted(URI link) {
- return false;
- }
-
- //
- // INTERFACE LinkEnabledCallback
- //
-
- /**
- * {@inheritDoc}
- */
- @Override
- public boolean isEnabled(ToadletContext toadletContext) {
- return !isFullAccessOnly();
- }
-
- /**
- * Exception that can be thrown to signal that a subclassed {@link Page}
- * wants to redirect the user during the
- * {@link FreenetTemplatePage#processTemplate(FreenetRequest, TemplateContext)}
- * method call.
- *
- * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
- */
- public static class RedirectException extends Exception {
-
- /** The target to redirect to. */
- private final String target;
-
- /**
- * Creates a new redirect exception.
- *
- * @param target
- * The target of the redirect
- */
- public RedirectException(String target) {
- this.target = target;
- }
-
- /**
- * Returns the target to redirect to.
- *
- * @return The target to redirect to
- */
- public String getTarget() {
- return target;
- }
-
- @Override
- public String toString() {
- return format("RedirectException{target='%s'}", target);
- }
-
- }
-
-}
projects / Sone.git / blobdiff