public void getEntryById(DBBroker broker, String path, String id, OutgoingMessage response)
throws EXistException, BadRequestException {
XQuery xquery = broker.getXQueryService();
CompiledXQuery feedQuery = xquery.getXQueryPool().borrowCompiledXQuery(broker, entryByIdSource);
XQueryContext context;
if (feedQuery == null) {
context = xquery.newContext(AccessContext.REST);
try {
feedQuery = xquery.compile(context, entryByIdSource);
} catch (XPathException ex) {
throw new EXistException("Cannot compile xquery " + entryByIdSource.getURL(), ex);
} catch (IOException ex) {
throw new EXistException(
"I/O exception while compiling xquery " + entryByIdSource.getURL(), ex);
}
} else {
context = feedQuery.getContext();
}
context.setStaticallyKnownDocuments(
new XmldbURI[] {XmldbURI.create(path).append(AtomProtocol.FEED_DOCUMENT_NAME)});
try {
context.declareVariable("id", id);
Sequence resultSequence = xquery.execute(feedQuery, null);
if (resultSequence.isEmpty()) {
throw new BadRequestException("No topic was found.");
}
String charset = getContext().getDefaultCharset();
response.setContentType("application/atom+xml; charset=" + charset);
Serializer serializer = broker.getSerializer();
serializer.reset();
try {
Writer w = new OutputStreamWriter(response.getOutputStream(), charset);
SAXSerializer sax =
(SAXSerializer) SerializerPool.getInstance().borrowObject(SAXSerializer.class);
Properties outputProperties = new Properties();
sax.setOutput(w, outputProperties);
serializer.setProperties(outputProperties);
serializer.setSAXHandlers(sax, sax);
serializer.toSAX(resultSequence, 1, 1, false);
SerializerPool.getInstance().returnObject(sax);
w.flush();
w.close();
} catch (IOException ex) {
LOG.fatal("Cannot read resource " + path, ex);
throw new EXistException("I/O error on read of resource " + path, ex);
} catch (SAXException saxe) {
LOG.warn(saxe);
throw new BadRequestException("Error while serializing XML: " + saxe.getMessage());
}
resultSequence.itemAt(0);
} catch (XPathException ex) {
throw new EXistException("Cannot execute xquery " + entryByIdSource.getURL(), ex);
} finally {
xquery.getXQueryPool().returnCompiledXQuery(entryByIdSource, feedQuery);
}
}
protected void handleGet(
boolean returnContent, DBBroker broker, IncomingMessage request, OutgoingMessage response)
throws BadRequestException, PermissionDeniedException, NotFoundException, EXistException {
DocumentImpl resource = null;
XmldbURI pathUri = XmldbURI.create(request.getPath());
try {
resource = broker.getXMLResource(pathUri, Lock.READ_LOCK);
if (resource == null) {
String id = request.getParameter("id");
if (id != null) {
id = id.trim();
if (id.length() == 0) {
id = null;
}
}
// Must be a collection
Collection collection = broker.getCollection(pathUri);
if (collection != null) {
if (!collection.getPermissions().validate(broker.getUser(), Permission.READ)) {
throw new PermissionDeniedException("Not allowed to read collection");
}
DocumentImpl feedDoc = collection.getDocument(broker, FEED_DOCUMENT_URI);
if (feedDoc == null) {
throw new BadRequestException(
"Collection " + request.getPath() + " is not an Atom feed.");
}
// Return the collection feed
String charset = getContext().getDefaultCharset();
if (returnContent) {
if (id == null) {
response.setStatusCode(200);
getFeed(broker, request.getPath(), response);
} else {
response.setStatusCode(200);
getEntryById(broker, request.getPath(), id, response);
}
} else {
response.setStatusCode(204);
}
} else {
throw new NotFoundException("Resource " + request.getPath() + " not found");
}
} else {
// Do we have permission to read the resource
if (!resource.getPermissions().validate(broker.getUser(), Permission.READ)) {
throw new PermissionDeniedException("Not allowed to read resource");
}
if (returnContent) {
response.setStatusCode(200);
if (resource.getResourceType() == DocumentImpl.BINARY_FILE) {
response.setContentType(resource.getMetadata().getMimeType());
try {
OutputStream os = response.getOutputStream();
broker.readBinaryResource((BinaryDocument) resource, os);
os.flush();
} catch (IOException ex) {
LOG.fatal("Cannot read resource " + request.getPath(), ex);
throw new EXistException("I/O error on read of resource " + request.getPath(), ex);
}
} else {
// xml resource
Serializer serializer = broker.getSerializer();
serializer.reset();
String charset = getContext().getDefaultCharset();
// Serialize the document
try {
response.setContentType(
resource.getMetadata().getMimeType() + "; charset=" + charset);
Writer w = new OutputStreamWriter(response.getOutputStream(), charset);
serializer.serialize(resource, w);
w.flush();
w.close();
} catch (IOException ex) {
LOG.fatal("Cannot read resource " + request.getPath(), ex);
throw new EXistException("I/O error on read of resource " + request.getPath(), ex);
} catch (SAXException saxe) {
LOG.warn(saxe);
throw new BadRequestException("Error while serializing XML: " + saxe.getMessage());
}
}
} else {
response.setStatusCode(204);
}
}
} finally {
if (resource != null) {
resource.getUpdateLock().release(Lock.READ_LOCK);
}
}
}
