| /* |
| * 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.scripting.freemarker.internal; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| import javax.servlet.RequestDispatcher; |
| import javax.servlet.ServletException; |
| |
| import freemarker.core.Environment; |
| import freemarker.template.TemplateDirectiveBody; |
| import freemarker.template.TemplateDirectiveModel; |
| import freemarker.template.TemplateException; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateModelException; |
| import freemarker.template.utility.DeepUnwrap; |
| 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.Resource; |
| import org.apache.sling.api.resource.ResourceUtil; |
| import org.apache.sling.api.resource.SyntheticResource; |
| import org.apache.sling.api.scripting.SlingBindings; |
| import org.apache.sling.scripting.core.servlet.CaptureResponseWrapper; |
| import org.osgi.service.component.annotations.Component; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Component( |
| service = { |
| TemplateModel.class |
| }, |
| property = { |
| "namespace=sling", |
| "name=include" |
| } |
| ) |
| public class IncludeDirective implements TemplateDirectiveModel { |
| |
| private static final String ADD_SELECTORS_PARAMETER_NAME = "addSelectors"; |
| |
| private static final String REPLACE_SELECTORS_PARAMETER_NAME = "replaceSelectors"; |
| |
| private static final String REPLACE_SUFFIX_PARAMETER_NAME = "replaceSuffix"; |
| |
| private static final String RESOURCE_TYPE_PARAMETER_NAME = "resourceType"; |
| |
| private final Logger logger = LoggerFactory.getLogger(IncludeDirective.class); |
| |
| public IncludeDirective() { // |
| } |
| |
| @Override |
| public void execute(final Environment environment, final Map parameters, final TemplateModel[] loopVars, final TemplateDirectiveBody body) throws TemplateException, IOException { |
| |
| final SlingHttpServletRequest slingHttpServletRequest = (SlingHttpServletRequest) DeepUnwrap.unwrap(environment.getVariable(SlingBindings.REQUEST)); |
| if (slingHttpServletRequest == null) { |
| throw new TemplateException("request is null", environment); |
| } |
| |
| final SlingHttpServletResponse slingHttpServletResponse = (SlingHttpServletResponse) DeepUnwrap.unwrap(environment.getVariable(SlingBindings.RESPONSE)); |
| if (slingHttpServletResponse == null) { |
| throw new TemplateException("response is null", environment); |
| } |
| |
| final TemplateModel templateModel = (TemplateModel) parameters.get("include"); |
| if (templateModel == null) { |
| throw new TemplateException("include is null", environment); |
| } |
| final Object include = DeepUnwrap.unwrap(templateModel); |
| if (include == null) { |
| throw new TemplateException("unwrapping include failed", environment); |
| } |
| |
| String path = null; |
| if (include instanceof String) { |
| path = (String) include; |
| } |
| Resource resource = null; |
| if (include instanceof Resource) { |
| resource = (Resource) include; |
| } |
| |
| if (path == null && resource == null) { |
| throw new TemplateException("path and resource are null", environment); |
| } |
| |
| // request dispatcher options |
| final RequestDispatcherOptions requestDispatcherOptions = prepareRequestDispatcherOptions(parameters); |
| // dispatch |
| final String content = dispatch(resource, path, slingHttpServletRequest, slingHttpServletResponse, requestDispatcherOptions); |
| if (content == null) { |
| throw new TemplateException("dispatching request failed, content is null", environment); |
| } |
| environment.getOut().write(content); |
| } |
| |
| protected <T> T unwrapParameter(final String name, final Map params, final Class<T> type) throws TemplateModelException { |
| final Object parameter = params.get(name); |
| final TemplateModel templateModel = (TemplateModel) parameter; |
| return (T) DeepUnwrap.unwrap(templateModel); |
| } |
| |
| protected RequestDispatcherOptions prepareRequestDispatcherOptions(final Map params) throws TemplateModelException { |
| final String resourceType = unwrapParameter(RESOURCE_TYPE_PARAMETER_NAME, params, String.class); |
| final String replaceSelectors = unwrapParameter(REPLACE_SELECTORS_PARAMETER_NAME, params, String.class); |
| final String addSelectors = unwrapParameter(ADD_SELECTORS_PARAMETER_NAME, params, String.class); |
| final String replaceSuffix = unwrapParameter(REPLACE_SUFFIX_PARAMETER_NAME, params, String.class); |
| |
| final RequestDispatcherOptions options = new RequestDispatcherOptions(); |
| options.setForceResourceType(resourceType); |
| options.setReplaceSelectors(replaceSelectors); |
| options.setAddSelectors(addSelectors); |
| options.setReplaceSuffix(replaceSuffix); |
| return options; |
| } |
| |
| /** |
| * @param resource the resource to include |
| * @param path the path to include |
| * @param slingHttpServletRequest the current request |
| * @param slingHttpServletResponse the current response |
| * @param requestDispatcherOptions the options for the request dispatcher |
| * @return the character response from the include call to request dispatcher |
| * @see "org.apache.sling.scripting.jsp.taglib.IncludeTagHandler" |
| */ |
| protected String dispatch(Resource resource, String path, final SlingHttpServletRequest slingHttpServletRequest, final SlingHttpServletResponse slingHttpServletResponse, final RequestDispatcherOptions requestDispatcherOptions) { |
| |
| // ensure the path (if set) is absolute and normalized |
| if (path != null) { |
| if (!path.startsWith("/")) { |
| path = slingHttpServletRequest.getResource().getPath() + "/" + path; |
| } |
| path = ResourceUtil.normalize(path); |
| } |
| |
| // check the resource |
| if (resource == null) { |
| if (path == null) { |
| // neither resource nor path is defined, use current resource |
| resource = slingHttpServletRequest.getResource(); |
| } else { |
| // check whether the path (would) resolve, else SyntheticRes. |
| final String resourceType = requestDispatcherOptions.getForceResourceType(); |
| final Resource tmp = slingHttpServletRequest.getResourceResolver().resolve(path); |
| if (tmp == null && resourceType != null) { |
| resource = new SyntheticResource(slingHttpServletRequest.getResourceResolver(), path, resourceType); // TODO DispatcherSyntheticResource? |
| // remove resource type overwrite as synthetic resource is correctly typed as requested |
| requestDispatcherOptions.remove(RequestDispatcherOptions.OPT_FORCE_RESOURCE_TYPE); |
| } |
| } |
| } |
| |
| try { |
| // create a dispatcher for the resource or path |
| final RequestDispatcher dispatcher; |
| if (resource != null) { |
| dispatcher = slingHttpServletRequest.getRequestDispatcher(resource, requestDispatcherOptions); |
| } else { |
| dispatcher = slingHttpServletRequest.getRequestDispatcher(path, requestDispatcherOptions); |
| } |
| |
| if (dispatcher != null) { |
| try { |
| final CaptureResponseWrapper wrapper = new CaptureResponseWrapper(slingHttpServletResponse); |
| dispatcher.include(slingHttpServletRequest, wrapper); |
| if (!wrapper.isBinaryResponse()) { |
| return wrapper.getCapturedCharacterResponse(); |
| } |
| } catch (ServletException e) { |
| logger.error(e.getMessage(), e); |
| } |
| } else { |
| logger.error("no request dispatcher: unable to include {}/'{}'", resource, path); |
| } |
| } catch (IOException e) { |
| logger.error(e.getMessage(), e); |
| } |
| return null; |
| } |
| |
| } |