org.openxdata.server.servlet.ImportServlet.java Source code

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Here is the source code for org.openxdata.server.servlet.ImportServlet.java

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/*
 *  Licensed to the OpenXdata Foundation (OXDF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The OXDF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with the License. 
 *  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, 
 *  software distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and limitations under the License.
 *
 *  Copyright 2010 http://www.openxdata.org.
 */
package org.openxdata.server.servlet;

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;
import org.apache.log4j.Logger;
import org.openxdata.server.service.UserService;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;

/**
 * Servlet that handles opening of files.
 * 
 * @author daniel
 *
 */
public class ImportServlet extends HttpServlet {

    private UserService userService;

    private Logger log = Logger.getLogger(this.getClass());
    private static final long serialVersionUID = -5428881060119162407L;

    @Override
    public void init(ServletConfig config) throws ServletException {
        super.init(config);

        ServletContext sctx = this.getServletContext();
        WebApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(sctx);
        userService = (UserService) ctx.getBean("userService");
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            String importType = request.getParameter("type");
            String filecontents = null;

            CommonsMultipartResolver multipartResover = new CommonsMultipartResolver(/*this.getServletContext()*/);
            if (multipartResover.isMultipart(request)) {
                MultipartHttpServletRequest multipartRequest = multipartResover.resolveMultipart(request);
                MultipartFile uploadedFile = multipartRequest.getFile("filecontents");
                if (uploadedFile != null && !uploadedFile.isEmpty()) {
                    filecontents = IOUtils.toString(uploadedFile.getInputStream());
                }
            }

            if (filecontents != null) {
                log.info("Starting import of type: " + importType);

                if (importType.equals("user")) {
                    String errors = userService.importUsers(filecontents);
                    if (errors != null) {
                        writeErrorsToResponse(errors, response);
                    }
                } else {
                    log.warn("Unknown import type: " + importType);
                }
            }
        } catch (Exception ex) {
            response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            response.getOutputStream().print(ex.getMessage());
        }
    }

    private void writeErrorsToResponse(String errors, HttpServletResponse response) throws IOException {
        response.setHeader("Cache-Control", "no-cache");
        response.setHeader("Pragma", "no-cache");
        response.setDateHeader("Expires", -1);
        response.setHeader("Cache-Control", "no-store");

        response.setHeader("Content-Type", "text/csv;charset=UTF-8");
        response.setHeader("Content-Disposition", "attachment; filename=importErrros.csv");

        response.getWriter().write(errors);
    }
}