/*******************************************************************************
 * Copyright (c) 2014, 2015 IBM Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *******************************************************************************/
package hulo.commons.servlet;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;

/**
 * Servlet implementation class ImportServlet
 */
@WebServlet("/import")
@MultipartConfig()
public class ImportServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		InputStream is = null;
		OutputStream os = null;
		try {
			Part part = null;
			try {
				part = request.getPart("file");
			} catch (Exception e) {
			}
			String contentType = null;
			int contentLength = -1;
			if (part == null) {
				is = request.getInputStream();
				contentType = request.getContentType();
				contentLength = request.getContentLength();
			} else {
				is = part.getInputStream();
				contentType = part.getContentType();
				contentLength = (int) part.getSize();
			}
			response.addHeader("Access-Control-Allow-Origin", "*");
			if (contentType != null) {
				response.setContentType(contentType);
			}
			if (contentLength > 0) {
				response.setContentLength(contentLength);
			}
			os = response.getOutputStream();
			byte data[] = new byte[4096];
			int len = 0;
			while ((len = is.read(data, 0, data.length)) > 0) {
				os.write(data, 0, len);
			}
			os.flush();
		} finally {
			if (is != null) {
				is.close();
			}
			if (os != null) {
				os.close();
			}
		}
	}

}
