/**
* Get the binary content of a datastream
*
* @param pid persistent identifier of the digital object
* @param dsid datastream identifier
* @return Binary blob
* @throws RepositoryException
*/
@GET
@Path("/{dsid}/content")
public Response getDatastreamContent(
@PathParam("pid") final String pid, @PathParam("dsid") final String dsid)
throws RepositoryException {
final Datastream ds = DatastreamService.getDatastream(pid, dsid);
return ok(ds.getContent(), ds.getMimeType()).build();
}
/**
* Get the datastream profile of a datastream
*
* @param pid persistent identifier of the digital object
* @param dsid datastream identifier
* @return 200
* @throws RepositoryException
* @throws IOException
* @throws TemplateException
*/
@GET
@Path("/{dsid}")
@Produces({TEXT_XML, APPLICATION_JSON})
public DatastreamProfile getDatastream(
@PathParam("pid") final String pid, @PathParam("dsid") final String dsId)
throws RepositoryException, IOException {
logger.trace("Executing getDatastream() with dsId: " + dsId);
Datastream ds = DatastreamService.getDatastream(pid, dsId);
logger.debug("Retrieved dsNode: " + ds.getNode().getName());
return getDSProfile(ds);
}
/**
* Get previous version information for this datastream
*
* @param pid persistent identifier of the digital object
* @param dsId datastream identifier
* @return 200
* @throws RepositoryException
* @throws IOException
* @throws TemplateException
*/
@GET
@Path("/{dsid}/versions")
@Produces({TEXT_XML, APPLICATION_JSON})
// TODO implement this after deciding on a versioning model
public DatastreamHistory getDatastreamHistory(
@PathParam("pid") final String pid, @PathParam("dsid") final String dsId)
throws RepositoryException, IOException {
final Datastream ds = DatastreamService.getDatastream(pid, dsId);
final DatastreamHistory dsHistory = new DatastreamHistory(singletonList(getDSProfile(ds)));
dsHistory.dsID = dsId;
dsHistory.pid = pid;
return dsHistory;
}
/**
* Get the binary content of a datastream
*
* @param pathList
* @return Binary blob
* @throws RepositoryException
*/
@GET
public Response getContent(
@PathParam("path") List<PathSegment> pathList, @Context final Request request)
throws RepositoryException {
String path = toPath(pathList);
final Datastream ds = datastreamService.getDatastream(path);
final EntityTag etag = new EntityTag(ds.getContentDigest().toString());
final Date date = ds.getLastModifiedDate();
final Date roundedDate = new Date();
roundedDate.setTime(date.getTime() - date.getTime() % 1000);
ResponseBuilder builder = request.evaluatePreconditions(roundedDate, etag);
final CacheControl cc = new CacheControl();
cc.setMaxAge(0);
cc.setMustRevalidate(true);
if (builder == null) {
builder = Response.ok(ds.getContent(), ds.getMimeType());
}
return builder.cacheControl(cc).lastModified(date).tag(etag).build();
}