diff options
Diffstat (limited to 'java/sca-contrib/modules/binding-rss-rome/src/main/java/org/apache/tuscany/sca/binding/rss/provider/RSSBindingListenerServlet.java')
| -rw-r--r-- | java/sca-contrib/modules/binding-rss-rome/src/main/java/org/apache/tuscany/sca/binding/rss/provider/RSSBindingListenerServlet.java | 394 |
1 files changed, 0 insertions, 394 deletions
diff --git a/java/sca-contrib/modules/binding-rss-rome/src/main/java/org/apache/tuscany/sca/binding/rss/provider/RSSBindingListenerServlet.java b/java/sca-contrib/modules/binding-rss-rome/src/main/java/org/apache/tuscany/sca/binding/rss/provider/RSSBindingListenerServlet.java deleted file mode 100644 index 7eb5aeb3df..0000000000 --- a/java/sca-contrib/modules/binding-rss-rome/src/main/java/org/apache/tuscany/sca/binding/rss/provider/RSSBindingListenerServlet.java +++ /dev/null @@ -1,394 +0,0 @@ -/* - * 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.tuscany.sca.binding.rss.provider; - -import java.io.IOException; -import java.io.OutputStreamWriter; -import java.io.UnsupportedEncodingException; -import java.io.Writer; -import java.net.URLDecoder; -import java.util.ArrayList; -import java.util.Date; -import java.util.List; -import java.util.StringTokenizer; -import java.util.logging.Logger; - -import javax.servlet.ServletException; -import javax.servlet.http.HttpServlet; -import javax.servlet.http.HttpServletRequest; -import javax.servlet.http.HttpServletResponse; -import javax.xml.namespace.QName; - -import org.apache.commons.codec.binary.Base64; -import org.apache.tuscany.sca.data.collection.Item; -import org.apache.tuscany.sca.databinding.Mediator; -import org.apache.tuscany.sca.interfacedef.DataType; -import org.apache.tuscany.sca.interfacedef.Operation; -import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl; -import org.apache.tuscany.sca.interfacedef.util.XMLType; -import org.apache.tuscany.sca.invocation.InvocationChain; -import org.apache.tuscany.sca.invocation.Invoker; -import org.apache.tuscany.sca.invocation.Message; -import org.apache.tuscany.sca.invocation.MessageFactory; -import org.apache.tuscany.sca.runtime.RuntimeWire; - -import com.sun.syndication.feed.synd.SyndContent; -import com.sun.syndication.feed.synd.SyndContentImpl; -import com.sun.syndication.feed.synd.SyndEntry; -import com.sun.syndication.feed.synd.SyndEntryImpl; -import com.sun.syndication.feed.synd.SyndFeed; -import com.sun.syndication.feed.synd.SyndFeedImpl; -import com.sun.syndication.feed.synd.SyndLink; -import com.sun.syndication.feed.synd.SyndLinkImpl; -import com.sun.syndication.io.FeedException; -import com.sun.syndication.io.SyndFeedOutput; - -/** - * An RSS binding listener, implemented as a Servlet and - * registered in a Servlet host provided by the SCA hosting runtime. - * - * @version $Rev$ $Date$ - */ -class RSSBindingListenerServlet extends HttpServlet { - private static final Logger logger = Logger.getLogger(RSSBindingListenerServlet.class.getName()); - private static final long serialVersionUID = 1L; - - private RuntimeWire wire; - private Invoker getFeedInvoker; - private Invoker getAllInvoker; - private Invoker queryInvoker; - private MessageFactory messageFactory; - private Mediator mediator; - private DataType<?> itemClassType; - private DataType<?> itemXMLType; - private boolean supportsFeedEntries; - - /** - * Constructs a new binding listener. - * - * @param wire - * @param messageFactory - */ - RSSBindingListenerServlet(RuntimeWire wire, MessageFactory messageFactory, Mediator mediator) { - this.wire = wire; - this.messageFactory = messageFactory; - this.mediator = mediator; - - // Get the invokers for the supported operations - Operation getOperation = null; - for (InvocationChain invocationChain : this.wire.getInvocationChains()) { - invocationChain.setAllowsPassByReference(true); - Operation operation = invocationChain.getTargetOperation(); - String operationName = operation.getName(); - if (operationName.equals("getFeed")) { - getFeedInvoker = invocationChain.getHeadInvoker(); - } else if (operationName.equals("getAll")) { - getAllInvoker = invocationChain.getHeadInvoker(); - } else if (operationName.equals("query")) { - queryInvoker = invocationChain.getHeadInvoker(); - } else if (operationName.equals("get")) { - getOperation = operation; - } - } - - // Determine the collection item type - itemXMLType = new DataTypeImpl<Class<?>>(String.class.getName(), String.class, String.class); - Class<?> itemClass = getOperation.getOutputType().getPhysical(); - if (itemClass == SyndEntry.class) { - supportsFeedEntries = true; - } - DataType<XMLType> outputType = getOperation.getOutputType(); - QName qname = outputType.getLogical().getElementName(); - qname = new QName(qname.getNamespaceURI(), itemClass.getSimpleName()); - itemClassType = new DataTypeImpl<XMLType>("java:complexType", itemClass, new XMLType(qname, null)); - - } - - @Override - protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { - - // No authentication required for a get request - - // Get the request path - String path = URLDecoder.decode(request.getRequestURI().substring(request.getServletPath().length()), "UTF-8"); - - logger.fine("get " + request.getRequestURI()); - - // Handle an RSS request - if (path == null || path.length() == 0 || path.equals("/")) { - - // Return an RSS feed containing the entries in the collection - SyndFeed feed = null; - if (supportsFeedEntries) { - - // The service implementation supports feed entries, invoke its getFeed operation - Message requestMessage = messageFactory.createMessage(); - Message responseMessage = getFeedInvoker.invoke(requestMessage); - if (responseMessage.isFault()) { - throw new ServletException((Throwable)responseMessage.getBody()); - } - feed = (SyndFeed)responseMessage.getBody(); - - } else { - - // The service implementation does not support feed entries, invoke its - // getAll operation to get the data item collection. then create feed entries - // from the data items - Message requestMessage = messageFactory.createMessage(); - Message responseMessage; - if (request.getQueryString() != null) { - requestMessage.setBody(new Object[] {request.getQueryString()}); - responseMessage = queryInvoker.invoke(requestMessage); - } else { - responseMessage = getAllInvoker.invoke(requestMessage); - } - if (responseMessage.isFault()) { - throw new ServletException((Throwable)responseMessage.getBody()); - } - org.apache.tuscany.sca.data.collection.Entry<Object, Object>[] collection = - (org.apache.tuscany.sca.data.collection.Entry<Object, Object>[])responseMessage.getBody(); - if (collection != null) { - // Create the feed - feed = new SyndFeedImpl(); - feed.setTitle("Feed"); - - for (org.apache.tuscany.sca.data.collection.Entry<Object, Object> entry: collection) { - SyndEntry feedEntry = createFeedEntry(entry); - feed.getEntries().add(feedEntry); - } - } - } - - // Convert to an RSS feed - if (feed != null) { - response.setContentType("application/rss+xml; charset=utf-8"); - feed.setFeedType("rss_2.0"); - feed.setLink(path); - SyndFeedOutput syndOutput = new SyndFeedOutput(); - try { - syndOutput.output(feed, getWriter(response)); - } catch (FeedException e) { - throw new ServletException(e); - } - } else { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } - } else { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } - - } - - /** - * Create an Atom entry from a data collection entry. - * @param entry - * @return - */ - private SyndEntry createFeedEntry(org.apache.tuscany.sca.data.collection.Entry<Object, Object> entry) { - Object key = entry.getKey(); - Object data = entry.getData(); - if (data instanceof Item) { - Item item = (Item)data; - - SyndEntry feedEntry = new SyndEntryImpl(); - feedEntry.setUri(key.toString()); - feedEntry.setTitle(item.getTitle()); - - String value = item.getContents(); - if (value != null) { - SyndContent content = new SyndContentImpl(); - content.setType("text/xml"); - content.setValue(value); - List<SyndContent> contents = new ArrayList<SyndContent>(); - contents.add(content); - feedEntry.setContents(contents); - } - - String href = item.getLink(); - if (href == null) { - href = key.toString(); - } - SyndLink link = new SyndLinkImpl(); - link.setRel("edit"); - link.setHref(href); - feedEntry.getLinks().add(link); - link = new SyndLinkImpl(); - link.setRel("alternate"); - link.setHref(href); - feedEntry.getLinks().add(link); - - Date date = item.getDate(); - if (date == null) { - date = new Date(); - } - feedEntry.setPublishedDate(date); - return feedEntry; - - } else if (data != null) { - SyndEntry feedEntry = new SyndEntryImpl(); - feedEntry.setUri(key.toString()); - feedEntry.setTitle("item"); - - // Convert the item to XML - String value = mediator.mediate(data, itemClassType, itemXMLType, null).toString(); - - SyndContent content = new SyndContentImpl(); - content.setType("text/xml"); - content.setValue(value); - List<SyndContent> contents = new ArrayList<SyndContent>(); - contents.add(content); - feedEntry.setContents(contents); - - SyndLink link = new SyndLinkImpl(); - link.setRel("edit"); - link.setHref(key.toString()); - feedEntry.getLinks().add(link); - link = new SyndLinkImpl(); - link.setRel("alternate"); - link.setHref(key.toString()); - feedEntry.getLinks().add(link); - - feedEntry.setPublishedDate(new Date()); - return feedEntry; - } else { - return null; - } - } - - /** - * Create a data collection entry from an RSS entry. - * @param feedEntry - * @return - */ - private org.apache.tuscany.sca.data.collection.Entry<Object, Object> createEntry(SyndEntry feedEntry) { - if (feedEntry != null) { - if (itemClassType.getPhysical() == Item.class) { - String key = feedEntry.getUri(); - - Item item = new Item(); - item.setTitle(feedEntry.getTitle()); - - List<?> contents = feedEntry.getContents(); - if (!contents.isEmpty()) { - SyndContent content = (SyndContent)contents.get(0); - String value = content.getValue(); - item.setContents(value); - } - - for (Object l : feedEntry.getLinks()) { - SyndLink link = (SyndLink)l; - if (link.getRel() == null || "edit".equals(link.getRel())) { - String href = link.getHref(); - if (href.startsWith("null/")) { - href = href.substring(5); - } - item.setLink(href); - break; - } - } - - item.setDate(feedEntry.getPublishedDate()); - - return new org.apache.tuscany.sca.data.collection.Entry<Object, Object>(key, item); - - } else { - String key = feedEntry.getUri(); - - // Create the item from XML - List<?> contents = feedEntry.getContents(); - if (contents.isEmpty()) { - return null; - } - SyndContent content = (SyndContent)contents.get(0); - String value = content.getValue(); - Object data = mediator.mediate(value, itemXMLType, itemClassType, null); - - return new org.apache.tuscany.sca.data.collection.Entry<Object, Object>(key, data); - } - } else { - return null; - } - } - - - private Writer getWriter(HttpServletResponse response) throws UnsupportedEncodingException, IOException { - Writer writer = new OutputStreamWriter(response.getOutputStream(), "UTF-8"); - return writer; - } - - /** - * Process the authorization header - * - * @param request - * @return - * @throws ServletException - */ - private String processAuthorizationHeader(HttpServletRequest request) throws ServletException { - try { - String authorization = request.getHeader("Authorization"); - if (authorization != null) { - StringTokenizer tokens = new StringTokenizer(authorization); - if (tokens.hasMoreTokens()) { - String basic = tokens.nextToken(); - if (basic.equalsIgnoreCase("Basic")) { - String credentials = tokens.nextToken(); - String userAndPassword = new String(Base64.decodeBase64(credentials.getBytes())); - int colon = userAndPassword.indexOf(":"); - if (colon != -1) { - String user = userAndPassword.substring(0, colon); - String password = userAndPassword.substring(colon + 1); - - // Authenticate the User. - if (authenticate(user, password)) { - return user; - } - } - } - } - } - } catch (Exception e) { - throw new ServletException(e); - } - return null; - } - - /** - * Authenticate a user. - * - * @param user - * @param password - * @return - */ - private boolean authenticate(String user, String password) { - - // TODO Handle this using SCA security policies - //FIXME Why are we using endsWith instead of equals here?? - return ("admin".endsWith(user) && "admin".equals(password)); - } - - /** - * Reject an unauthorized request. - * - * @param response - */ - private void unauthorized(HttpServletResponse response) throws IOException { - response.setHeader("WWW-Authenticate", "BASIC realm=\"Tuscany\""); - response.sendError(HttpServletResponse.SC_UNAUTHORIZED); - } -} |