diff options
Diffstat (limited to 'branches/sca-java-20080910/modules/binding-atom-abdera/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java')
-rw-r--r-- | branches/sca-java-20080910/modules/binding-atom-abdera/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java | 846 |
1 files changed, 0 insertions, 846 deletions
diff --git a/branches/sca-java-20080910/modules/binding-atom-abdera/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java b/branches/sca-java-20080910/modules/binding-atom-abdera/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java deleted file mode 100644 index d31247d3ae..0000000000 --- a/branches/sca-java-20080910/modules/binding-atom-abdera/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java +++ /dev/null @@ -1,846 +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.atom.provider; - -import static org.apache.tuscany.sca.binding.atom.provider.AtomBindingUtil.entry; -import static org.apache.tuscany.sca.binding.atom.provider.AtomBindingUtil.feedEntry; - -import java.io.IOException; -import java.io.OutputStreamWriter; -import java.io.UnsupportedEncodingException; -import java.io.Writer; -import java.net.URLDecoder; -import java.text.SimpleDateFormat; -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.abdera.Abdera; -import org.apache.abdera.factory.Factory; -import org.apache.abdera.i18n.iri.IRI; -import org.apache.abdera.model.Collection; -import org.apache.abdera.model.Document; -import org.apache.abdera.model.Feed; -import org.apache.abdera.model.Link; -import org.apache.abdera.model.Service; -import org.apache.abdera.model.Workspace; -import org.apache.abdera.parser.ParseException; -import org.apache.abdera.parser.Parser; -import org.apache.abdera.writer.WriterFactory; - -import org.apache.commons.codec.binary.Base64; -import org.apache.tuscany.sca.binding.http.CacheContext; -import org.apache.tuscany.sca.data.collection.Entry; -import org.apache.tuscany.sca.databinding.Mediator; -import org.apache.tuscany.sca.interfacedef.DataType; -import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl; -import org.apache.tuscany.sca.interfacedef.Operation; -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; - -/** - * A resource collection binding listener, implemented as a Servlet and - * registered in a Servlet host provided by the SCA hosting runtime. - * - * @version $Rev$ $Date$ - */ -class AtomBindingListenerServlet extends HttpServlet { - private static final Logger logger = Logger.getLogger(AtomBindingListenerServlet.class.getName()); - private static final long serialVersionUID = 1L; - - private static final Factory abderaFactory = Abdera.getNewFactory(); - private static final Parser abderaParser = Abdera.getNewParser(); - private static final String ETAG = "ETag"; - private static final String LASTMODIFIED = "Last-Modified"; - private static final String LOCATION = "Location"; - private static final String CONTENTLOCATION = "Content-Location"; - private static final SimpleDateFormat dateFormat = new SimpleDateFormat( "EEE, dd MMM yyyy HH:mm:ss Z" ); // RFC 822 date time - - private RuntimeWire wire; - private Invoker getFeedInvoker; - private Invoker getAllInvoker; - private Invoker queryInvoker; - private Invoker getInvoker; - private Invoker postInvoker; - private Invoker postMediaInvoker; - private Invoker putInvoker; - private Invoker putMediaInvoker; - private Invoker deleteInvoker; - private MessageFactory messageFactory; - private String title; - private Mediator mediator; - private DataType<?> itemClassType; - private DataType<?> itemXMLType; - private boolean supportsFeedEntries; - - /** - * Constructs a new binding listener. - * - * @param wire - * @param messageFactory - * @param feedType - */ - AtomBindingListenerServlet(RuntimeWire wire, MessageFactory messageFactory, Mediator mediator, String title) { - this.wire = wire; - this.messageFactory = messageFactory; - this.mediator = mediator; - this.title = title; - - // 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")) { - getInvoker = invocationChain.getHeadInvoker(); - getOperation = operation; - } else if (operationName.equals("put")) { - putInvoker = invocationChain.getHeadInvoker(); - } else if (operationName.equals("putMedia")) { - putMediaInvoker = invocationChain.getHeadInvoker(); - } else if (operationName.equals("post")) { - postInvoker = invocationChain.getHeadInvoker(); - } else if (operationName.equals("postMedia")) { - postMediaInvoker = invocationChain.getHeadInvoker(); - } else if (operationName.equals("delete")) { - deleteInvoker = invocationChain.getHeadInvoker(); - } - } - - // Determine the collection item type - itemXMLType = new DataTypeImpl<Class<?>>(String.class.getName(), String.class, String.class); - Class<?> itemClass = getOperation.getOutputType().getPhysical(); - if (itemClass == org.apache.abdera.model.Entry.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 - - // Test for any cache info in the request - CacheContext cacheContext = null; - try { - cacheContext = CacheContext.getCacheContextFromRequest( request ); - } catch ( java.text.ParseException e ) { - } - // System.out.println( "AtomBindingListener.doGet cache context=" + cacheContext ); - - // Get the request path - int servletPathLength = request.getContextPath().length() + request.getServletPath().length(); - String path = URLDecoder.decode(request.getRequestURI().substring(servletPathLength), "UTF-8"); - - logger.fine("get " + request.getRequestURI()); - - // Handle an Atom request - if (path != null && path.equals("/atomsvc")) { - /* - <?xml version='1.0' encoding='UTF-8'?> - <service xmlns="http://www.w3.org/2007/app" xmlns:atom="http://www.w3.org/2005/Atom"> - <workspace> - <atom:title type="text">resource</atom:title> - <collection href="http://luck.ibm.com:8084/customer"> - <atom:title type="text">entries</atom:title> - <accept>application/atom+xml;type=entry</accept> - <categories /> - </collection> - </workspace> - </service> - */ - - // Return the Atom service document - response.setContentType("application/atomsvc+xml; charset=utf-8"); - - Service service = abderaFactory.newService(); - //service.setText("service"); - - Workspace workspace = abderaFactory.newWorkspace(); - workspace.setTitle("resource"); - - String href = request.getRequestURL().toString(); - href = href.substring(0, href.length() - "/atomsvc".length()); - - Collection collection = workspace.addCollection("collection", "atom/feed"); - collection.setTitle("entries"); - collection.setAttributeValue("href", href); - collection.setAccept("entry"); - collection.addCategories().setFixed(false); - - workspace.addCollection(collection); - - service.addWorkspace(workspace); - - //FIXME add prettyPrint support - try { - service.getDocument().writeTo(response.getOutputStream()); - } catch (IOException ioe) { - throw new ServletException(ioe); - } - - } else if (path == null || path.length() == 0 || path.equals("/")) { - - // Return a feed containing the entries in the collection - Feed feed = null; - if (supportsFeedEntries) { - - // The service implementation supports feed entries, invoke its getFeed operation - Message requestMessage = messageFactory.createMessage(); - Message responseMessage; - if (request.getQueryString() != null) { - requestMessage.setBody(new Object[] {request.getQueryString()}); - responseMessage = queryInvoker.invoke(requestMessage); - } else { - responseMessage = getFeedInvoker.invoke(requestMessage); - } - if (responseMessage.isFault()) { - throw new ServletException((Throwable)responseMessage.getBody()); - } - feed = (Feed)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 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()); - } - Entry<Object, Object>[] collection = - (Entry<Object, Object>[])responseMessage.getBody(); - if (collection != null) { - - // Create the feed - feed = abderaFactory.newFeed(); - - // Set the feed title - if (title != null) { - feed.setTitle(title); - } else { - feed.setTitle("Feed"); - } - // All feeds must provide Id and updated elements. - // However, some do not, so provide some program protection. - feed.setId( "Feed" + feed.hashCode()); - Date responseLastModified = new Date( 0 ); - - // Add entries to the feed - for (Entry<Object, Object> entry: collection) { - org.apache.abdera.model.Entry feedEntry = feedEntry(entry, itemClassType, itemXMLType, mediator, abderaFactory); - // Use the most recent entry update as the feed update - Date entryUpdated = feedEntry.getUpdated(); - if (( entryUpdated != null ) && (entryUpdated.compareTo( responseLastModified ) > 0 )) - responseLastModified = entryUpdated; - feed.addEntry(feedEntry); - } - // If no entries were newly updated, - if ( responseLastModified.compareTo( new Date( 0 ) ) == 0 ) - responseLastModified = new Date(); - } - } - if (feed != null) { - String feedETag = "\"" + generateFeedETag( feed ) + "\""; - Date feedUpdated = feed.getUpdated(); - // Test request for predicates. - String predicate = request.getHeader( "If-Match" ); - if (( predicate != null ) && ( !predicate.equals(feedETag) )) { - // No match, should short circuit - response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); - return; - } - predicate = request.getHeader( "If-None-Match" ); - if (( predicate != null ) && ( predicate.equals(feedETag) )) { - // Match, should short circuit - response.sendError(HttpServletResponse.SC_NOT_MODIFIED); - return; - } - if ( feedUpdated != null ) { - predicate = request.getHeader( "If-Unmodified-Since" ); - if ( predicate != null ) { - try { - Date predicateDate = dateFormat.parse( predicate ); - if ( predicateDate.compareTo( feedUpdated ) < 0 ) { - // Match, should short circuit - response.sendError(HttpServletResponse.SC_NOT_MODIFIED); - return; - } - } catch ( java.text.ParseException e ) { - // Ignore and move on - } - } - predicate = request.getHeader( "If-Modified-Since" ); - if ( predicate != null ) { - try { - Date predicateDate = dateFormat.parse( predicate ); - if ( predicateDate.compareTo( feedUpdated ) > 0 ) { - // Match, should short circuit - response.sendError(HttpServletResponse.SC_NOT_MODIFIED); - return; - } - } catch ( java.text.ParseException e ) { - // Ignore and move on - } - } - } - // Provide Etag based on Id and time. - response.addHeader(ETAG, feedETag ); - if ( feedUpdated != null ) - response.addHeader(LASTMODIFIED, dateFormat.format( feedUpdated )); - - // Content negotiation - String acceptType = request.getHeader( "Accept" ); - String preferredType = getContentPreference( acceptType ); - if (( preferredType != null ) && ((preferredType.indexOf( "json") > -1) || (preferredType.indexOf( "JSON") > -1 ))) { - // JSON response body - response.setContentType("application/json;type=feed"); - - try { - Abdera abdera = new Abdera(); - WriterFactory wf = abdera.getWriterFactory(); - org.apache.abdera.writer.Writer json = wf.getWriter("json"); - feed.writeTo(json, response.getWriter()); - } catch (Exception e) { - throw new ServletException(e); - } - - } else { - // Write the Atom feed - response.setContentType("application/atom+xml;type=feed"); - try { - feed.getDocument().writeTo(response.getOutputStream()); - } catch (IOException ioe) { - throw new ServletException(ioe); - } - } - } else { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } - - } else if (path.startsWith("/")) { - // Return a specific entry in the collection - org.apache.abdera.model.Entry feedEntry; - - // Invoke the get operation on the service implementation - Message requestMessage = messageFactory.createMessage(); - String id = path.substring(1); - requestMessage.setBody(new Object[] {id}); - Message responseMessage = getInvoker.invoke(requestMessage); - if (responseMessage.isFault()) { - throw new ServletException((Throwable)responseMessage.getBody()); - } - if (supportsFeedEntries) { - // The service implementation returns a feed entry - feedEntry = responseMessage.getBody(); - } else { - // The service implementation only returns a data item, create an entry - // from it - Entry<Object, Object> entry = new Entry<Object, Object>(id, responseMessage.getBody()); - feedEntry = feedEntry(entry, itemClassType, itemXMLType, mediator, abderaFactory); - } - // Write the Atom entry - if (feedEntry != null) { - String entryETag = "\"" + generateEntryETag( feedEntry ) + "\""; - Date entryUpdated = feedEntry.getUpdated(); - if ( entryUpdated != null ) - response.addHeader(LASTMODIFIED, dateFormat.format( entryUpdated )); - // TODO Check If-Modified-Since If-Unmodified-Since predicates against LASTMODIFIED. - // If true return 304 and null body. - - Link link = feedEntry.getSelfLink(); - if (link != null) { - response.addHeader(LOCATION, link.getHref().toString()); - } else { - link = feedEntry.getLink( "Edit" ); - if (link != null) { - response.addHeader(LOCATION, link.getHref().toString()); - } - } - - // Test request for predicates. - String predicate = request.getHeader( "If-Match" ); - if (( predicate != null ) && ( !predicate.equals(entryETag) )) { - // No match, should short circuit - response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); - return; - } - predicate = request.getHeader( "If-None-Match" ); - if (( predicate != null ) && ( predicate.equals(entryETag) )) { - // Match, should short circuit - response.sendError(HttpServletResponse.SC_NOT_MODIFIED); - return; - } - if ( entryUpdated != null ) { - predicate = request.getHeader( "If-Unmodified-Since" ); - if ( predicate != null ) { - try { - Date predicateDate = dateFormat.parse( predicate ); - if ( predicateDate.compareTo( entryUpdated ) < 0 ) { - // Match, should short circuit - response.sendError(HttpServletResponse.SC_NOT_MODIFIED); - return; - } - } catch ( java.text.ParseException e ) { - // Ignore and move on - } - } - predicate = request.getHeader( "If-Modified-Since" ); - if ( predicate != null ) { - try { - Date predicateDate = dateFormat.parse( predicate ); - if ( predicateDate.compareTo( entryUpdated ) > 0 ) { - // Match, should short circuit - response.sendError(HttpServletResponse.SC_NOT_MODIFIED); - return; - } - } catch ( java.text.ParseException e ) { - // Ignore and move on - } - } - } - // Provide Etag based on Id and time. - response.addHeader(ETAG, entryETag ); - if ( entryUpdated != null ) - response.addHeader(LASTMODIFIED, dateFormat.format( entryUpdated )); - - // Content negotiation - String acceptType = request.getHeader( "Accept" ); - String preferredType = getContentPreference( acceptType ); - if (( preferredType != null ) && ((preferredType.indexOf( "json") > -1) || (preferredType.indexOf( "JSON") > -1 ))) { - // JSON response body - response.setContentType("application/json;type=entry"); - try { - Abdera abdera = new Abdera(); - WriterFactory wf = abdera.getWriterFactory(); - org.apache.abdera.writer.Writer json = wf.getWriter("json"); - feedEntry.writeTo(json, response.getWriter()); - } catch (Exception e) { - throw new ServletException(e); - } - } else { - // XML response body - response.setContentType("application/atom+xml;type=entry"); - try { - feedEntry.writeTo(getWriter(response)); - } catch (IOException ioe) { - throw new ServletException(ioe); - } - } - } else { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } - } else { - // Path doesn't match any known pattern - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } - - } - - @Override - protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, - IOException { - // Authenticate the user - String user = processAuthorizationHeader(request); - if (user == null) { - unauthorized(response); - return; - } - - // Get the request path - String path = URLDecoder.decode(request.getRequestURI().substring(request.getServletPath().length()), "UTF-8"); - - if (path == null || path.length() == 0 || path.equals("/")) { - org.apache.abdera.model.Entry createdFeedEntry = null; - - // Create a new Atom entry - String contentType = request.getContentType(); - if (contentType != null && contentType.startsWith("application/atom+xml")) { - - // Read the entry from the request - org.apache.abdera.model.Entry feedEntry; - try { - Document<org.apache.abdera.model.Entry> doc = abderaParser.parse(request.getReader()); - feedEntry = doc.getRoot(); - } catch (ParseException pe) { - throw new ServletException(pe); - } - - // Let the component implementation create it - if (supportsFeedEntries) { - - // The service implementation supports feed entries, pass the entry to it - Message requestMessage = messageFactory.createMessage(); - requestMessage.setBody(new Object[] {feedEntry}); - Message responseMessage = postInvoker.invoke(requestMessage); - if (responseMessage.isFault()) { - throw new ServletException((Throwable)responseMessage.getBody()); - } - createdFeedEntry = responseMessage.getBody(); - } else { - - // The service implementation does not support feed entries, pass the data item to it - Message requestMessage = messageFactory.createMessage(); - Entry<Object, Object> entry = entry(feedEntry, itemClassType, itemXMLType, mediator); - requestMessage.setBody(new Object[] {entry.getKey(), entry.getData()}); - Message responseMessage = postInvoker.invoke(requestMessage); - if (responseMessage.isFault()) { - throw new ServletException((Throwable)responseMessage.getBody()); - } - entry.setKey(responseMessage.getBody()); - createdFeedEntry = feedEntry(entry, itemClassType, itemXMLType, mediator, abderaFactory); - } - - } else if (contentType != null) { - - // Create a new media entry - - // Get incoming headers - String title = request.getHeader("Title"); - String slug = request.getHeader("Slug"); - - // Let the component implementation create the media entry - Message requestMessage = messageFactory.createMessage(); - requestMessage.setBody(new Object[] {title, slug, contentType, request.getInputStream()}); - Message responseMessage = postMediaInvoker.invoke(requestMessage); - if (responseMessage.isFault()) { - throw new ServletException((Throwable)responseMessage.getBody()); - } - createdFeedEntry = responseMessage.getBody(); - } else { - response.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE); - } - - // A new entry was created successfully - if (createdFeedEntry != null) { - - // Set location of the created entry in the Location header - IRI feedId = createdFeedEntry.getId(); - if ( feedId != null ) - response.addHeader(ETAG, "\"" + feedId.toString() + "\"" ); - Date entryUpdated = createdFeedEntry.getUpdated(); - if ( entryUpdated != null ) - response.addHeader(LASTMODIFIED, dateFormat.format( entryUpdated )); - Link link = createdFeedEntry.getSelfLink(); - if (link != null) { - response.addHeader(LOCATION, link.getHref().toString()); - } else { - link = createdFeedEntry.getLink( "Edit" ); - if (link != null) { - response.addHeader(LOCATION, link.getHref().toString()); - } - } - - // Write the created Atom entry - response.setStatus(HttpServletResponse.SC_CREATED); - response.setContentType("application/atom+xml;type=entry"); - try { - createdFeedEntry.writeTo(getWriter(response)); - } catch (ParseException pe) { - throw new ServletException(pe); - } - - } else { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } - - } else { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } - } - - private Writer getWriter(HttpServletResponse response) throws UnsupportedEncodingException, IOException { - Writer writer = new OutputStreamWriter(response.getOutputStream(), "UTF-8"); - return writer; - } - - @Override - protected void doPut(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { - // Authenticate the user - String user = processAuthorizationHeader(request); - if (user == null) { - unauthorized(response); - return; - } - - // Get the request path - String path = request.getRequestURI().substring(request.getServletPath().length()); - - if (path != null && path.startsWith("/")) { - String id = path.substring(1); - - // Update an Atom entry - String contentType = request.getContentType(); - if (contentType != null && contentType.startsWith("application/atom+xml")) { - - // Read the entry from the request - org.apache.abdera.model.Entry feedEntry; - try { - Document<org.apache.abdera.model.Entry> doc = abderaParser.parse(request.getReader()); - feedEntry = doc.getRoot(); - } catch (ParseException pe) { - throw new ServletException(pe); - } - - // Let the component implementation create it - if (supportsFeedEntries) { - // The service implementation supports feed entries, pass the entry to it - Message requestMessage = messageFactory.createMessage(); - requestMessage.setBody(new Object[] {id, feedEntry}); - Message responseMessage = putInvoker.invoke(requestMessage); - if (responseMessage.isFault()) { - Object body = responseMessage.getBody(); - if (body.getClass().getName().endsWith(".NotFoundException")) { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } else { - throw new ServletException((Throwable)responseMessage.getBody()); - } - } - } else { - // The service implementation does not support feed entries, pass the data item to it - Message requestMessage = messageFactory.createMessage(); - Entry<Object, Object> entry = entry(feedEntry, itemClassType, itemXMLType, mediator); - requestMessage.setBody(new Object[] {entry.getKey(), entry.getData()}); - Message responseMessage = putInvoker.invoke(requestMessage); - if (responseMessage.isFault()) { - Object body = responseMessage.getBody(); - if (body.getClass().getName().endsWith(".NotFoundException")) { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } else { - throw new ServletException((Throwable)responseMessage.getBody()); - } - } - } - - } else if (contentType != null) { - - // Updated a media entry - - // Let the component implementation create the media entry - Message requestMessage = messageFactory.createMessage(); - requestMessage.setBody(new Object[] {id, contentType, request.getInputStream()}); - Message responseMessage = putMediaInvoker.invoke(requestMessage); - Object body = responseMessage.getBody(); - if (responseMessage.isFault()) { - if (body.getClass().getName().endsWith(".NotFoundException")) { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } else { - throw new ServletException((Throwable)responseMessage.getBody()); - } - } - } else { - response.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE); - } - } else { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } - } - - @Override - protected void doDelete(HttpServletRequest request, HttpServletResponse response) throws ServletException, - IOException { - - // Authenticate the user - String user = processAuthorizationHeader(request); - if (user == null) { - unauthorized(response); - return; - } - - // Get the request path - String path = URLDecoder.decode(request.getRequestURI().substring(request.getServletPath().length()), "UTF-8"); - - String id; - if (path != null && path.startsWith("/")) { - id = path.substring(1); - } else { - id = ""; - } - - // Delete a specific entry from the collection - Message requestMessage = messageFactory.createMessage(); - requestMessage.setBody(new Object[] {id}); - Message responseMessage = deleteInvoker.invoke(requestMessage); - if (responseMessage.isFault()) { - Object body = responseMessage.getBody(); - if (body.getClass().getName().endsWith(".NotFoundException")) { - response.sendError(HttpServletResponse.SC_NOT_FOUND); - } else { - throw new ServletException((Throwable)responseMessage.getBody()); - } - } - } - - /** - * Process the authorization header - * - * @param request - * @return - * @throws ServletException - */ - private String processAuthorizationHeader(HttpServletRequest request) throws ServletException { - - // FIXME temporarily disabling this as it doesn't work with all browsers - if (true) - return "admin"; - - 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 - return ("admin".equals(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); - } - - /** - * Generate ETag based on feed Id and updated fields. - * Note that the feed id should be unique per feed, immutable, and unchanging, - * but the ETag should change whenever the feed contents change. - * @param feed - * @return ETag - */ - public static String generateFeedETag( Feed feed ) { - if ( feed == null ) { - return null; - } - - IRI feedIdIRI = feed.getId(); - String feedId = "ID"; - if ( feedIdIRI != null ) { - feedId = feedIdIRI.toString(); - } - - Date feedUpdated = feed.getUpdated(); - if ( feedUpdated == null ) { - return feedId; - } - - return feedId + "-" + feedUpdated.hashCode(); - } - - /** - * Generate ETag based on entry Id and updated fields. - * Note that the entry id should be unique per entry, immutable, and unchanging, - * but the ETag should change whenever the entry contents change. - * @param feed - * @return ETag - */ - public static String generateEntryETag( org.apache.abdera.model.Entry entry ) { - if ( entry == null ) { - return null; - } - - IRI entryIdIRI = entry.getId(); - String entryId = "ID"; - if ( entryIdIRI != null ) { - entryId = entryIdIRI.toString(); - } - - Date entryUpdated = entry.getUpdated(); - if ( entryUpdated == null ) { - return entryId; - } - - return entryId + "-" + entryUpdated.hashCode(); - } - - public static String getContentPreference( String acceptType ) { - if (( acceptType == null ) || ( acceptType.length() < 1 )) { - return "application/atom+xml"; - } - StringTokenizer st = new StringTokenizer( acceptType, "," ); - if ( st.hasMoreTokens() ) - return st.nextToken(); - return "application/atom+xml"; - } - -} |