@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();
}
private Keyword getKeyword(final Request request) {
if (request.isParam(Command.HELP)) {
return Keyword.HELP;
}
if (request.isParam(Command.NEW)) {
return Keyword.NEW;
}
if (request.isParam(Command.DIFF)) {
return Keyword.DIFF;
}
return Keyword.NONE;
}
private Response doSyncUpdate(final Request request) {
loggerContext.init(getRequestId(request.getRemoteAddress()));
try {
if (!sourceMatchesContext(request.getSource())) {
return Response.status(Response.Status.BAD_REQUEST)
.entity("Invalid source specified: " + request.getSource())
.build();
}
boolean notificationsEnabled = true;
if (request.isParam(Command.REDIRECT)) {
if (!ipRanges.isTrusted(IpInterval.parse(request.getRemoteAddress()))) {
return Response.status(Response.Status.FORBIDDEN)
.entity("Not allowed to disable notifications: " + request.getRemoteAddress())
.build();
}
notificationsEnabled = false;
}
if (!request.hasParam(Command.DATA) && request.isParam(Command.NEW)) {
return Response.status(Response.Status.BAD_REQUEST)
.entity("DATA parameter is missing")
.build();
}
if (!request.hasParam(Command.DATA) && !request.isParam(Command.HELP)) {
return Response.status(Response.Status.BAD_REQUEST).entity("Invalid request").build();
}
loggerContext.log("msg-in.txt", new SyncUpdateLogCallback(request.toString()));
final UpdateContext updateContext = new UpdateContext(loggerContext);
final String content = request.hasParam("DATA") ? request.getParam("DATA") : "";
final UpdateRequest updateRequest =
new UpdateRequest(
new SyncUpdate(dateTimeProvider, request.getRemoteAddress()),
getKeyword(request),
content,
updatesParser.parse(
updateContext, Lists.newArrayList(new ContentWithCredentials(content))),
notificationsEnabled);
final UpdateResponse updateResponse =
updateRequestHandler.handle(updateRequest, updateContext);
loggerContext.log("msg-out.txt", new SyncUpdateLogCallback(updateResponse.getResponse()));
return getResponse(updateResponse);
} finally {
loggerContext.remove();
}
}