UploadServlet.java

package org.kvj.lima1.gae.sync.rest;

import java.io.IOException;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.amber.oauth2.common.OAuth;
import org.codehaus.jettison.json.JSONObject;
import org.kvj.lima1.gae.sync.data.FileStorage;

import com.google.appengine.api.blobstore.BlobKey;
import com.google.appengine.api.blobstore.BlobstoreService;
import com.google.appengine.api.blobstore.BlobstoreServiceFactory;

public class UploadServlet extends OAuthSecuredServlet {

	BlobstoreService blobstoreService = BlobstoreServiceFactory
			.getBlobstoreService();
	private static final long serialVersionUID = 1L;

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)
			throws ServletException, IOException {
		String name = req.getParameter("name");
		String app = req.getParameter("app");
		Map<String, BlobKey> blobs = blobstoreService.getUploadedBlobs(req);
		BlobKey file = blobs.get("file");
		log.info("Upload: " + name + " - " + file);
		if (null != name && null != file) {
			String result = FileStorage.upload(app,
					(String) req.getAttribute(OAuth.OAUTH_CLIENT_ID), file,
					name);
			if (null != result) {
				throw new ServletException(result);
			}
			writeJSON(new JSONObject(), resp);
		} else {
			throw new ServletException("Invalid parameters");
		}
	}

	@Override
	protected JSONObject get(HttpServletRequest req) throws Exception {
		JSONObject result = new JSONObject();
		result.put(
				"u",
				blobstoreService.createUploadUrl("/rest/file/upload?name="
						+ req.getParameter("name") + "&oauth_token="
						+ req.getAttribute(OAuth.OAUTH_TOKEN) + "&app="
						+ req.getParameter("app")));
		return result;
	}
}