| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.sling.samples.fling.internal; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.LinkedHashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.annotation.Nonnull; |
| import javax.servlet.RequestDispatcher; |
| import javax.servlet.Servlet; |
| import javax.servlet.ServletException; |
| |
| import org.apache.sling.api.SlingHttpServletRequest; |
| import org.apache.sling.api.SlingHttpServletResponse; |
| import org.apache.sling.api.request.RequestDispatcherOptions; |
| import org.apache.sling.api.resource.ResourceResolver; |
| import org.apache.sling.api.resource.ResourceResolverFactory; |
| import org.apache.sling.api.servlets.HttpConstants; |
| import org.apache.sling.api.servlets.SlingAllMethodsServlet; |
| import org.apache.sling.api.wrappers.SlingHttpServletRequestWrapper; |
| import org.apache.sling.api.wrappers.ValueMapDecorator; |
| import org.apache.sling.commons.messaging.MessageService; |
| import org.apache.sling.commons.messaging.Result; |
| import org.apache.sling.samples.fling.form.Form; |
| import org.apache.sling.samples.fling.form.FormFactory; |
| import org.apache.sling.scripting.thymeleaf.DefaultSlingContext; |
| import org.apache.sling.validation.ValidationResult; |
| import org.apache.sling.validation.ValidationService; |
| import org.apache.sling.validation.model.ValidationModel; |
| import org.osgi.framework.Constants; |
| import org.osgi.service.component.annotations.Component; |
| import org.osgi.service.component.annotations.Reference; |
| import org.osgi.service.component.annotations.ReferencePolicy; |
| import org.osgi.service.component.annotations.ReferencePolicyOption; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.thymeleaf.ITemplateEngine; |
| import org.thymeleaf.context.IContext; |
| |
| @Component( |
| service = Servlet.class, |
| property = { |
| Constants.SERVICE_DESCRIPTION + "=Apache Sling Fling Sample “Form Servlet”", |
| Constants.SERVICE_VENDOR + "=The Apache Software Foundation", |
| "sling.servlet.resourceTypes=fling/page/form", |
| "sling.servlet.methods=POST" |
| } |
| ) |
| public class FormServlet extends SlingAllMethodsServlet { |
| |
| @Reference( |
| policy = ReferencePolicy.DYNAMIC, |
| policyOption = ReferencePolicyOption.GREEDY |
| ) |
| private volatile ValidationService validationService; |
| |
| @Reference( |
| policy = ReferencePolicy.DYNAMIC, |
| policyOption = ReferencePolicyOption.GREEDY |
| ) |
| private volatile ResourceResolverFactory resourceResolverFactory; |
| |
| @Reference( |
| policy = ReferencePolicy.DYNAMIC, |
| policyOption = ReferencePolicyOption.GREEDY |
| ) |
| private volatile ITemplateEngine templateEngine; |
| |
| @Reference( |
| policy = ReferencePolicy.DYNAMIC, |
| policyOption = ReferencePolicyOption.GREEDY |
| ) |
| private volatile MessageService messageService; |
| |
| private final String recipient = "recipient@example.net"; // TODO |
| |
| // see FormPage.form |
| private static final String FORM_REQUEST_ATTRIBUTE_NAME = "form"; |
| |
| private static final String SUCCESS_SELECTOR = "success"; |
| |
| private final Logger logger = LoggerFactory.getLogger(FormServlet.class); |
| |
| public FormServlet() { |
| } |
| |
| @Override |
| protected void doPost(@Nonnull SlingHttpServletRequest request, @Nonnull SlingHttpServletResponse response) throws ServletException, IOException { |
| final Map<String, Object> base = new LinkedHashMap<>(); |
| final ValueMapDecorator parameters = new ValueMapDecorator(base); |
| final Enumeration<String> names = request.getParameterNames(); |
| while (names.hasMoreElements()) { |
| final String name = names.nextElement(); |
| parameters.put(name, request.getRequestParameter(name)); |
| } |
| logger.debug("parameters: {}", parameters); |
| |
| final String formType = request.getParameter("formType"); |
| logger.debug("form type is '{}'", formType); |
| |
| final Form form = FormFactory.build(formType, parameters); |
| if (form == null) { |
| fail(null, 400, request, response); |
| return; |
| } |
| |
| final String resourcePath = request.getRequestPathInfo().getResourcePath(); |
| final ValidationModel validationModel = validationService.getValidationModel(form.getResourceType(), resourcePath, false); |
| if (validationModel == null) { |
| logger.error("no validation model found"); |
| fail(form, 500, request, response); |
| return; |
| } |
| |
| final ValidationResult validationResult = validationService.validate(parameters, validationModel); |
| form.setValidationResult(validationResult); |
| |
| if (!validationResult.isValid()) { |
| logger.debug("validation result not valid"); |
| fail(form, 400, request, response); |
| return; |
| } |
| |
| // render form with message template |
| final String template = "/apps/fling/messaging/form/comment.txt"; // TODO |
| final Map<String, Object> variables = Collections.singletonMap("form", form); |
| |
| final String message; |
| try (final ResourceResolver resourceResolver = resourceResolverFactory.getServiceResourceResolver(null)) { |
| final IContext context = new DefaultSlingContext(resourceResolver, Locale.ENGLISH, variables); |
| logger.debug("rendering message template '{}' with variables: {}", template, variables); |
| message = templateEngine.process(template, context); |
| } catch (Exception e) { // TODO |
| logger.error("sending message failed: {}", e.getMessage(), e); // TODO |
| fail(form, 500, request, response); |
| return; |
| } |
| logger.debug("message: '{}'", message); |
| |
| try { |
| final CompletableFuture<Result> future = messageService.send(message, recipient); |
| future.get(1, TimeUnit.SECONDS); |
| logger.debug("comment [{}] form sent to {}", message, recipient); |
| } catch (Exception e) { |
| logger.error("sending message failed: {}", e.getMessage(), e); |
| fail(form, 500, request, response); |
| return; |
| } |
| |
| succeed(form, request, response); |
| } |
| |
| private void fail(final Form form, final int status, final SlingHttpServletRequest request, final SlingHttpServletResponse response) throws ServletException, IOException { |
| response.setStatus(status); |
| forward(form, request, response, null); |
| } |
| |
| private void succeed(final Form form, final SlingHttpServletRequest request, final SlingHttpServletResponse response) throws ServletException, IOException { |
| final RequestDispatcherOptions options = new RequestDispatcherOptions(); |
| options.setAddSelectors(SUCCESS_SELECTOR); |
| forward(form, request, response, options); |
| } |
| |
| private void forward(final Form form, final SlingHttpServletRequest request, final SlingHttpServletResponse response, final RequestDispatcherOptions options) throws ServletException, IOException { |
| final FormValidationHttpServletRequestWrapper requestWrapper = new FormValidationHttpServletRequestWrapper(request, form); |
| final RequestDispatcher dispatcher = request.getRequestDispatcher(request.getResource(), options); |
| dispatcher.forward(requestWrapper, response); |
| } |
| |
| private class FormValidationHttpServletRequestWrapper extends SlingHttpServletRequestWrapper { |
| |
| FormValidationHttpServletRequestWrapper(final SlingHttpServletRequest request, final Form form) { |
| super(request); |
| setAttribute(FORM_REQUEST_ATTRIBUTE_NAME, form); |
| } |
| |
| @Override |
| public String getMethod() { |
| return HttpConstants.METHOD_GET; |
| } |
| |
| } |
| |
| } |