diff options
Diffstat (limited to 'sca-java-2.x/tags/2.0.1-RC1/modules/binding-atom-runtime/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java')
| -rw-r--r-- | sca-java-2.x/tags/2.0.1-RC1/modules/binding-atom-runtime/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java | 910 |
1 files changed, 910 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/binding-atom-runtime/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-atom-runtime/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java new file mode 100644 index 0000000000..861ff5d182 --- /dev/null +++ b/sca-java-2.x/tags/2.0.1-RC1/modules/binding-atom-runtime/src/main/java/org/apache/tuscany/sca/binding/atom/provider/AtomBindingListenerServlet.java @@ -0,0 +1,910 @@ +/* + * 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.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 org.apache.abdera.Abdera; +import org.apache.abdera.factory.Factory; +import org.apache.abdera.i18n.iri.IRI; +import org.apache.abdera.model.Category; +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.tuscany.sca.binding.atom.utils.AtomBindingHttpUtils; +import org.apache.tuscany.sca.common.http.HTTPCacheContext; +import org.apache.tuscany.sca.common.http.HTTPUtils; +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.Operation; +import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl; +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.Invocable; + +/** + * 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 Invocable 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 String description; + private Mediator mediator; + private DataType<?> itemClassType; + private DataType<?> itemXMLType; + private boolean supportsFeedEntries; + + /** + * Constructs a new binding listener. + * + * @param wire + * @param messageFactory + * @param feedType + */ + AtomBindingListenerServlet(Invocable wire, MessageFactory messageFactory, Mediator mediator, String title, String description) { + this.wire = wire; + this.messageFactory = messageFactory; + this.mediator = mediator; + this.title = title; + this.description = description; + + // 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 + if (getOperation != null) { + itemXMLType = new DataTypeImpl<Class<?>>(String.class.getName(), String.class, String.class); + Class<?> itemClass = getOperation.getOutputType().getLogical().get(0).getPhysical(); + if (itemClass == org.apache.abdera.model.Entry.class) { + supportsFeedEntries = true; + } + //We assume that the item type is the same for both input and + //ouput for all operations on the interface + itemClassType = getOperation.getOutputType().getLogical().get(0); + } + } + + @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 + HTTPCacheContext cacheContext = null; + try { + cacheContext = HTTPCacheContext.createCacheContextFromRequest( request ); + } catch ( java.text.ParseException e ) { + } + // System.out.println( "AtomBindingListener.doGet cache context=" + cacheContext ); + + // Get the request path + String path = URLDecoder.decode(HTTPUtils.getRequestPath(request), "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</accept> + <categories /> + </collection> + </workspace> + </service> + */ + + // Return the Atom service document + response.setDateHeader("Date", System.currentTimeMillis()); + response.setContentType("application/atomsvc+xml"); + + String href = request.getRequestURL().toString(); + href = href.substring(0, href.length() - "/atomsvc".length()); + + String workspaceURL = new String( href ); + int pathIndex = workspaceURL.indexOf( request.getServletPath() ); + if ( -1 != pathIndex ) { + workspaceURL = workspaceURL.substring( 0, pathIndex ) + "/"; + } + + Service service = abderaFactory.newService(); + //service.setText("service"); + + Workspace workspace = abderaFactory.newWorkspace(); + if ( title != null ) { + workspace.setTitle(title); + } else { + workspace.setTitle("workspace"); + } + workspace.setBaseUri( new IRI( workspaceURL )); + + Collection collection = workspace.addCollection("collection", href ); + Feed feed = getFeed( request ); + if ( feed != null ) { + String title = feed.getTitle(); + if ( title != null ) { + collection.setTitle(title); + } else { + collection.setTitle("entries"); + } + collection.addAccepts("application/atom+xml"); + collection.addAccepts("application/json"); + List<Category> categories = feed.getCategories(); + if ( categories != null ) { + collection.addCategories(categories, false, null); + } else { + collection.addCategories().setFixed(false); + } + + } else { + collection.setTitle("entries"); + + collection.addAccepts("application/atom+xml"); + collection.addAccepts("application/json"); + 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 = getFeed( request ); + if (feed != null) { + String feedETag = null; + feedETag = HTTPUtils.calculateHashETag(feed.toString().getBytes("utf-8")); + 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( exactSeconds(feedUpdated) ) < 0 ) { + // Match, should short circuit + response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED); + 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( exactSeconds(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 if given. + // Ignore if not given. (Browser may cache if trivial ETag is given.) + if ( feedETag != null ) { + response.addHeader(ETAG, feedETag); + } + if ( feedUpdated != null ) { + response.addHeader(LASTMODIFIED, dateFormat.format( feedUpdated )); + } + + //default http header for response + AtomBindingHttpUtils.prepareHTTPResponse(request, response); + + // 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"); + + 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"); + 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()) { + Object body = responseMessage.getBody(); + if (body.getClass().getName().endsWith(".NotFoundException")) { + response.sendError(HttpServletResponse.SC_NOT_FOUND); + return; + } else { + 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 = null; + entryETag = HTTPUtils.calculateHashETag(feedEntry.toString().getBytes("utf-8")); + 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 if given. + // Ignore if not given. (Browser may cache if trivial ETag is given.) + if (entryETag != null) { + response.addHeader(ETAG, entryETag ); + } + if ( entryUpdated != null ) { + response.addHeader(LASTMODIFIED, dateFormat.format( entryUpdated )); + } + + //default http header for response + AtomBindingHttpUtils.prepareHTTPResponse(request, response); + + // 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"); + 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"); + 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); + } + + } + + protected Feed getFeed( HttpServletRequest request ) throws ServletException { + 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()); + } + return (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 feed = abderaFactory.newFeed(); + + // Set the feed title + if (title != null) { + feed.setTitle(title); + } else { + feed.setTitle("Feed"); + } + if (description != null) { + feed.setSubtitle(description); + } + // All feeds must provide Id and updated elements. + // However, some do not, so provide some program protection. + feed.setId(request.getRequestURI()); + 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(); + } + return feed; + } + } + return null; + } + + @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(HTTPUtils.getRequestPath(request), "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(); + + // Transfer media info to response header. + // Summary is a comma separated list of header properties. + String summary = createdFeedEntry.getSummary(); + addPropertiesToHeader( response, summary ); + + } else { + response.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE); + } + + // A new entry for non-media 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, "\"" + HTTPUtils.calculateHashETag(createdFeedEntry.toString().getBytes("utf-8")) + "\"" ); + } + 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()); + } + Link editLink = createdFeedEntry.getEditLink(); + if (editLink != null) { + response.addHeader(LOCATION, editLink.getHref().toString()); + } + Link editMediaLink = createdFeedEntry.getEditMediaLink(); + if (editMediaLink != null) { + response.addHeader(CONTENTLOCATION, editMediaLink.getHref().toString()); + } + + //default http header for response + AtomBindingHttpUtils.prepareHTTPResponse(request, response); + + // Write the created Atom entry + response.setStatus(HttpServletResponse.SC_CREATED); + response.setContentType("application/atom+xml"); + 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 = URLDecoder.decode(HTTPUtils.getRequestPath(request), "UTF-8"); + + 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) { + + // Update 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()); + } + } + + // Transfer content to response header. + + } 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(HTTPUtils.getRequestPath(request), "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); + } + + /** + * Get content-type preference using application/atom-xml as default + * @param acceptType content-type preference using application/atom-xml as default + * @return + */ + private 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"; + } + + /** Take a list of key values and add them to the header. + * For instance "Content-Type=image/gif,Content-Length=14201" + * @param response + * @param properties + */ + private static void addPropertiesToHeader( HttpServletResponse response, String properties ) { + if ( properties == null ) return; + StringTokenizer props = new StringTokenizer( properties, ","); + while( props.hasMoreTokens()) { + String prop = props.nextToken(); + StringTokenizer keyVal = new StringTokenizer( prop, "="); + String key = null; + String val = null; + if ( keyVal.hasMoreTokens() ) + key = keyVal.nextToken(); + if ( keyVal.hasMoreTokens() ) + val = keyVal.nextToken(); + if (( key != null ) && ( val != null )) { + response.addHeader(key, val); + } + } + } + + /** + * Round a date down to an exact number of seconds + * @param date with millisecond precision + * @return date rounded down to nearest second + */ + private static Date exactSeconds(Date date) { + return new Date(date.getTime() / 1000 * 1000); + } + +} |