private DownloadableContent getFlowFileContent(
final String connectionId, final String flowfileId, final String dataUri) {
// TODO - ensure the user is authorized - not checking with @PreAuthorized annotation as aspect
// not trigger on call within a class
// if (!NiFiUserUtils.getAuthorities().contains(Authority.ROLE_DFM.toString())) {
// throw new AccessDeniedException("Access is denied.");
// }
return serviceFacade.getContent(connectionId, flowfileId, dataUri);
}
private DownloadableContent getProvenanceEventContent(
final Long eventId, final String dataUri, final ContentDirection direction) {
// TODO - ensure the user is authorized - not checking with @PreAuthorized annotation as aspect
// not trigger on call within a class
// if (!NiFiUserUtils.getAuthorities().contains(Authority.ROLE_PROVENANCE.toString())) {
// throw new AccessDeniedException("Access is denied.");
// }
return serviceFacade.getContent(eventId, dataUri, direction);
}
@Override
@PreAuthorize("hasRole('ROLE_PROVENANCE')")
public DownloadableContent getContent(final ContentRequestContext request) {
// if clustered, send request to cluster manager
if (properties.isClusterManager()) {
// get the URI
URI dataUri;
try {
dataUri = new URI(request.getDataUri());
} catch (final URISyntaxException use) {
throw new ClusterRequestException(use);
}
// set the request parameters
final MultivaluedMap<String, String> parameters = new MultivaluedMapImpl();
parameters.add(CLIENT_ID_PARAM, request.getClientId());
// set the headers
final Map<String, String> headers = new HashMap<>();
if (StringUtils.isNotBlank(request.getProxiedEntitiesChain())) {
headers.put("X-ProxiedEntitiesChain", request.getProxiedEntitiesChain());
}
// add the user's authorities (if any) to the headers
final Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
if (authentication != null) {
final Object userDetailsObj = authentication.getPrincipal();
if (userDetailsObj instanceof NiFiUserDetails) {
// serialize user details object
final String hexEncodedUserDetails =
WebUtils.serializeObjectToHex((Serializable) userDetailsObj);
// put serialized user details in header
headers.put("X-ProxiedEntityUserDetails", hexEncodedUserDetails);
}
}
// get the target node and ensure it exists
final Node targetNode = clusterManager.getNode(request.getClusterNodeId());
if (targetNode == null) {
throw new UnknownNodeException("The specified cluster node does not exist.");
}
final Set<NodeIdentifier> targetNodes = new HashSet<>();
targetNodes.add(targetNode.getNodeId());
// replicate the request to the specific node
final NodeResponse nodeResponse =
clusterManager.applyRequest(HttpMethod.GET, dataUri, parameters, headers, targetNodes);
final ClientResponse clientResponse = nodeResponse.getClientResponse();
final MultivaluedMap<String, String> responseHeaders = clientResponse.getHeaders();
// get the file name
final String contentDisposition = responseHeaders.getFirst("Content-Disposition");
final String filename = StringUtils.substringBetween(contentDisposition, "filename=\"", "\"");
// get the content type
final String contentType = responseHeaders.getFirst("Content-Type");
// create the downloadable content
return new DownloadableContent(filename, contentType, clientResponse.getEntityInputStream());
} else {
// example URI: http://localhost:8080/nifi-api/controller/provenance/events/1/content/input
final String eventDetails = StringUtils.substringAfterLast(request.getDataUri(), "events/");
final String rawEventId = StringUtils.substringBefore(eventDetails, "/content/");
final String rawDirection = StringUtils.substringAfterLast(eventDetails, "/content/");
// get the content type
final Long eventId;
final ContentDirection direction;
try {
eventId = Long.parseLong(rawEventId);
direction = ContentDirection.valueOf(rawDirection.toUpperCase());
} catch (final IllegalArgumentException iae) {
throw new IllegalArgumentException("The specified data reference URI is not valid.");
}
return serviceFacade.getContent(eventId, request.getDataUri(), direction);
}
}