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package com.sun.jersey.samples.storageservice.resources;
import com.sun.jersey.api.NotFoundException;
import com.sun.jersey.samples.storageservice.Container;
import com.sun.jersey.samples.storageservice.Item;
import com.sun.jersey.samples.storageservice.MemoryStore;
import java.math.BigInteger;
import java.net.URI;
import java.security.MessageDigest;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.core.EntityTag;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Request;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
import javax.ws.rs.core.UriInfo;
/**
*
* @author Paul.Sandoz@Sun.Com
*/
public class ItemResource {
UriInfo uriInfo;
Request request;
String container;
String item;
public ItemResource(UriInfo uriInfo, Request request,
String container, String item) {
this.uriInfo = uriInfo;
this.request = request;
this.container = container;
this.item = item;
}
@GET
public Response getItem() {
System.out.println("GET ITEM " + container + " " + item);
Item i = MemoryStore.MS.getItem(container, item);
if (i == null)
throw new NotFoundException("Item not found");
Date lastModified = i.getLastModified().getTime();
EntityTag et = new EntityTag(i.getDigest());
ResponseBuilder rb = request.evaluatePreconditions(lastModified, et);
if (rb != null)
return rb.build();
byte[] b = MemoryStore.MS.getItemData(container, item);
return Response.ok(b, i.getMimeType()).
lastModified(lastModified).tag(et).build();
}
@PUT
public Response putItem(
@Context HttpHeaders headers,
byte[] data) {
System.out.println("PUT ITEM " + container + " " + item);
URI uri = uriInfo.getAbsolutePath();
MediaType mimeType = headers.getMediaType();
GregorianCalendar gc = new GregorianCalendar();
gc.set(GregorianCalendar.MILLISECOND, 0);
Item i = new Item(item, uri.toString(), mimeType.toString(), gc);
String digest = computeDigest(data);
i.setDigest(digest);
Response r;
if (!MemoryStore.MS.hasItem(container, item)) {
r = Response.created(uri).build();
} else {
r = Response.noContent().build();
}
Item ii = MemoryStore.MS.createOrUpdateItem(container, i, data);
if (ii == null) {
// Create the container if one has not been created
URI containerUri = uriInfo.getAbsolutePathBuilder().path("..").
build().normalize();
Container c = new Container(container, containerUri.toString());
MemoryStore.MS.createContainer(c);
i = MemoryStore.MS.createOrUpdateItem(container, i, data);
if (i == null)
throw new NotFoundException("Container not found");
}
return r;
}
@DELETE
public void deleteItem() {
System.out.println("DELETE ITEM " + container + " " + item);
Item i = MemoryStore.MS.deleteItem(container, item);
if (i == null) {
throw new NotFoundException("Item not found");
}
}
private String computeDigest(byte[] content) {
try {
MessageDigest md = MessageDigest.getInstance("SHA");
byte[] digest = md.digest(content);
BigInteger bi = new BigInteger(digest);
return bi.toString(16);
} catch (Exception e) {
return "";
}
}
}