org.openmrs.module.sync.web.CreateChildServlet.java Source code

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Here is the source code for org.openmrs.module.sync.web.CreateChildServlet.java

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/**
 * The contents of this file are subject to the OpenMRS Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://license.openmrs.org
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * Copyright (C) OpenMRS, LLC.  All Rights Reserved.
 */
package org.openmrs.module.sync.web;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;

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

import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.openmrs.api.context.Context;
import org.openmrs.module.sync.SyncConstants;
import org.openmrs.module.sync.SyncUtil;
import org.openmrs.module.sync.api.SyncService;
import org.openmrs.util.OpenmrsUtil;
import org.openmrs.web.WebConstants;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;

/**
 * 
 */
public class CreateChildServlet extends HttpServlet {

    /** Logger for this class and subclasses */
    protected final Log log = LogFactory.getLog(getClass());
    private static final long serialVersionUID = 1L;
    private CommonsMultipartResolver multipartResolver;

    /**
     * @see javax.servlet.GenericServlet#init(javax.servlet.ServletConfig)
     */
    @Override
    public void init(ServletConfig config) throws ServletException {
        // TODO Auto-generated method stub
        super.init(config);
        multipartResolver = new CommonsMultipartResolver(this.getServletContext());
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        HttpSession session = request.getSession();
        if (!Context.isAuthenticated()) {
            response.sendRedirect(request.getContextPath() + "/login.htm");
            return;
        }
        if (!Context.hasPrivilege(SyncConstants.PRIV_BACKUP_ENTIRE_DATABASE)) {
            session.setAttribute(WebConstants.OPENMRS_ERROR_ATTR,
                    "Privilege required: " + SyncConstants.PRIV_BACKUP_ENTIRE_DATABASE);
            session.setAttribute(WebConstants.OPENMRS_LOGIN_REDIRECT_HTTPSESSION_ATTR,
                    request.getRequestURI() + "?" + request.getQueryString());
            response.sendRedirect(request.getContextPath() + "/login.htm");
            return;
        }
        File generatedFile = Context.getService(SyncService.class).generateDataFile();
        response.setContentType("text/sql");
        response.setHeader("Content-Disposition", "attachment; filename=" + generatedFile.getName());
        response.setHeader("Pragma", "no-cache");
        IOUtils.copy(new FileInputStream(generatedFile), response.getOutputStream());
        response.getOutputStream().flush();
        response.getOutputStream().close();

        boolean clonedDBLog = Boolean.parseBoolean(Context.getAdministrationService()
                .getGlobalProperty(SyncConstants.PROPERTY_SYNC_CLONED_DATABASE_LOG_ENABLED, "true"));

        if (!clonedDBLog) {
            generatedFile.delete();
        }
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        HttpSession session = request.getSession();
        if (!Context.isAuthenticated()) {
            reply(response, "Not logged in, please login and retry again", "red");
            return;
        }
        if (!Context.hasPrivilege(SyncConstants.PRIV_BACKUP_ENTIRE_DATABASE)) {
            session.setAttribute(WebConstants.OPENMRS_ERROR_ATTR,
                    "Privilege required: " + SyncConstants.PRIV_BACKUP_ENTIRE_DATABASE);
            session.setAttribute(WebConstants.OPENMRS_LOGIN_REDIRECT_HTTPSESSION_ATTR,
                    request.getRequestURI() + "?" + request.getQueryString());
            response.sendRedirect(request.getContextPath() + "/login.htm");
            return;
        }
        response.setContentType("text/html");
        MultipartHttpServletRequest multipartRequest = multipartResolver.resolveMultipart(request);
        MultipartFile mf = multipartRequest.getFile("cloneFile");
        if (mf != null && !mf.isEmpty()) {
            try {
                File dir = SyncUtil.getSyncApplicationDir();
                File file = new File(dir, SyncConstants.CLONE_IMPORT_FILE_NAME
                        + SyncConstants.SYNC_FILENAME_MASK.format(new Date()) + ".sql");
                IOUtils.copy(mf.getInputStream(), new FileOutputStream(file));
                Context.getService(SyncService.class).execGeneratedFile(file);

                reply(response, "Child database successfully updated", "green");

                boolean clonedDBLog = Boolean.parseBoolean(Context.getAdministrationService()
                        .getGlobalProperty(SyncConstants.PROPERTY_SYNC_CLONED_DATABASE_LOG_ENABLED, "true"));

                if (!clonedDBLog) {
                    file.delete();
                }
            } catch (Exception ex) {
                log.warn("Unable to read the clone data file", ex);
                reply(response, "Unable to read the data clonefile" + ex.toString(), "red");
                ex.printStackTrace();
            }
        } else {

            reply(response, "The file sent is null or empty, please select a file to upload", "red");
        }

    }

    private void reply(HttpServletResponse response, String str, String color) {
        try {
            response.getWriter().println("<html><body onload=\"window.parent.showUploadResponse('" + str + "','"
                    + color + "');\"></body></html>");
        } catch (Exception ex) {
            log.warn(ex.toString());
            ex.printStackTrace();
        }
    }
}