@GET
@Path("/{id}")
public Response get(@PathParam("id") int id, @Context Request request) {
// Create cache control header
CacheControl cc = new CacheControl();
// Set max age to one day
cc.setMaxAge(86400);
Response.ResponseBuilder rb = null;
// Calculate the ETag on last modified date of user resource
EntityTag etag = new EntityTag(UserDao.getLastModifiedById(id).hashCode() + "");
// Verify if it matched with etag available in http request
rb = request.evaluatePreconditions(etag);
// If ETag matches the rb will be non-null;
// Use the rb to return the response without any further processing
if (rb != null) {
return rb.cacheControl(cc).tag(etag).build();
}
// If rb is null then either it is first time request; or resource is modified
// Get the updated representation and return with Etag attached to it
rb = Response.ok(UserDao.get(id).get()).cacheControl(cc).tag(etag);
return rb.build();
}
@Autowired
public IncogitoResource(IncogitoApplication incogito) {
this.incogito = incogito;
cacheForOneHourCacheControl = new CacheControl();
cacheForOneHourCacheControl.setMaxAge(3600);
}
private static Response generateStreamingGeotiffResponse(final GridCoverage2D coverage) {
StreamingOutput streamingOutput =
new StreamingOutput() {
public void write(OutputStream outStream) {
try {
long t0 = System.currentTimeMillis();
GeoTiffWriteParams wp = new GeoTiffWriteParams();
wp.setCompressionMode(GeoTiffWriteParams.MODE_EXPLICIT);
wp.setCompressionType("LZW");
ParameterValueGroup params = new GeoTiffFormat().getWriteParameters();
params
.parameter(AbstractGridFormat.GEOTOOLS_WRITE_PARAMS.getName().toString())
.setValue(wp);
new GeoTiffWriter(outStream)
.write(
coverage,
(GeneralParameterValue[])
params.values().toArray(new GeneralParameterValue[1]));
// new GeoTiffWriter(outStream).write(coverage, null); //wasn't this line writing
// twice and trashing compressed version?
long t1 = System.currentTimeMillis();
LOG.debug("wrote geotiff in {}msec", t1 - t0);
} catch (Exception e) {
LOG.error("exception while preparing geotiff : {}", e.getMessage());
throw new WebApplicationException(e);
}
}
};
CacheControl cc = new CacheControl();
cc.setMaxAge(3600);
cc.setNoCache(false);
return Response.ok(streamingOutput).type("image/geotiff").cacheControl(cc).build();
}
public static Response generateStreamingImageResponse(
final BufferedImage image, final MIMEImageFormat format) {
if (image == null) {
LOG.warn("response image is null");
}
StreamingOutput streamingOutput =
new StreamingOutput() {
public void write(OutputStream outStream) {
try {
long t0 = System.currentTimeMillis();
ImageIO.write(image, format.type, outStream);
long t1 = System.currentTimeMillis();
LOG.debug("wrote image in {}msec", (int) (t1 - t0));
} catch (Exception e) {
LOG.error("exception while preparing image : {}", e.getMessage());
throw new WebApplicationException(e);
}
}
};
CacheControl cc = new CacheControl();
cc.setMaxAge(3600);
cc.setNoCache(false);
return Response.ok(streamingOutput).type(format.toString()).cacheControl(cc).build();
}
public void filter(ContainerRequestContext req, ContainerResponseContext res) throws IOException {
if (req.getMethod().equals("GET")) {
CacheControl cc = new CacheControl();
cc.setMaxAge(this.maxAge);
res.getHeaders().add("Cache-Control", cc);
}
}
private Response.ResponseBuilder getNoCacheResponseBuilder(Response.Status status) {
CacheControl cc = new CacheControl();
cc.setNoCache(true);
cc.setMaxAge(-1);
cc.setMustRevalidate(true);
return Response.status(status).cacheControl(cc);
}
/**
* Get the binary content of a datastream
*
* @param rangeValue the range value
* @return Binary blob
* @throws IOException if io exception occurred
*/
protected Response getBinaryContent(final String rangeValue) throws IOException {
final FedoraBinary binary = (FedoraBinary) resource();
// we include an explicit etag, because the default behavior is to use the JCR node's etag, not
// the jcr:content node digest. The etag is only included if we are not within a transaction.
final String txId = TransactionServiceImpl.getCurrentTransactionId(session());
if (txId == null) {
checkCacheControlHeaders(request, servletResponse, binary, session());
}
final CacheControl cc = new CacheControl();
cc.setMaxAge(0);
cc.setMustRevalidate(true);
Response.ResponseBuilder builder;
if (rangeValue != null && rangeValue.startsWith("bytes")) {
final Range range = Range.convert(rangeValue);
final long contentSize = binary.getContentSize();
final String endAsString;
if (range.end() == -1) {
endAsString = Long.toString(contentSize - 1);
} else {
endAsString = Long.toString(range.end());
}
final String contentRangeValue =
String.format("bytes %s-%s/%s", range.start(), endAsString, contentSize);
if (range.end() > contentSize || (range.end() == -1 && range.start() > contentSize)) {
builder =
status(REQUESTED_RANGE_NOT_SATISFIABLE).header("Content-Range", contentRangeValue);
} else {
final RangeRequestInputStream rangeInputStream =
new RangeRequestInputStream(binary.getContent(), range.start(), range.size());
builder =
status(PARTIAL_CONTENT)
.entity(rangeInputStream)
.header("Content-Range", contentRangeValue);
}
} else {
final InputStream content = binary.getContent();
builder = ok(content);
}
// we set the content-type explicitly to avoid content-negotiation from getting in the way
return builder.type(binary.getMimeType()).cacheControl(cc).build();
}
private static void evaluateRequestPreconditions(
final Request request,
final HttpServletResponse servletResponse,
final FedoraResource resource,
final Session session,
final boolean cacheControl) {
final String txId = TransactionServiceImpl.getCurrentTransactionId(session);
if (txId != null) {
// Force cache revalidation if in a transaction
servletResponse.addHeader(CACHE_CONTROL, "must-revalidate");
servletResponse.addHeader(CACHE_CONTROL, "max-age=0");
return;
}
final EntityTag etag = new EntityTag(resource.getEtagValue());
final Date date = resource.getLastModifiedDate();
final Date roundedDate = new Date();
if (date != null) {
roundedDate.setTime(date.getTime() - date.getTime() % 1000);
}
Response.ResponseBuilder builder = request.evaluatePreconditions(etag);
if (builder != null) {
builder = builder.entity("ETag mismatch");
} else {
builder = request.evaluatePreconditions(roundedDate);
if (builder != null) {
builder = builder.entity("Date mismatch");
}
}
if (builder != null && cacheControl) {
final CacheControl cc = new CacheControl();
cc.setMaxAge(0);
cc.setMustRevalidate(true);
// here we are implicitly emitting a 304
// the exception is not an error, it's genuinely
// an exceptional condition
builder = builder.cacheControl(cc).lastModified(date).tag(etag);
}
if (builder != null) {
throw new WebApplicationException(builder.build());
}
}
@GET
@Path("/")
@ApiOperation(
value = "List the available reports",
responseClass = "String",
multiValueResponse = true)
@Produces({
MediaType.TEXT_HTML,
MediaType.APPLICATION_JSON,
MediaType.APPLICATION_XML,
"text/csv"
})
public Response listReports(@Context HttpHeaders headers, @Context UriInfo uriInfo) {
List<Link> links = new ArrayList<Link>(reports.length);
for (String report : reports) {
UriBuilder uriBuilder = uriInfo.getBaseUriBuilder();
uriBuilder.path("/reports/{report}");
URI uri = uriBuilder.build(report);
Link link = new Link(report, uri.toString());
links.add(link);
}
MediaType mediaType = headers.getAcceptableMediaTypes().get(0);
Response.ResponseBuilder builder = Response.ok();
if (mediaType.getType().equals("text") && mediaType.getSubtype().equals("csv")) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("Report,URL\n");
for (Link link : links) {
stringBuilder.append(link.getRel()).append(",").append(link.getHref());
stringBuilder.append('\n');
}
builder.entity(stringBuilder.toString());
} else if (mediaType.equals(MediaType.TEXT_HTML_TYPE)) {
builder.entity(renderTemplate("reportIndex", links));
} else {
GenericEntity<List<Link>> list = new GenericEntity<List<Link>>(links) {};
builder.entity(list);
}
CacheControl cacheControl = new CacheControl();
cacheControl.setMaxAge(86400); // TODO 1 day or longer? What unit is this anyway?
builder.cacheControl(cacheControl);
return builder.build();
}
/**
* 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();
}
static {
cache.setMaxAge(60); // 60 seconds
cache.setPrivate(true); // no caching on the shared proxy, only the final client
cache.setNoStore(true); // client cannot persist to disk, only in-memory.
}
