Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2014 Mxico Abierto * * 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. * * For more information visit https://github.com/mxabierto/avisos. */ package mx.org.cedn.avisosconagua.engine.processors; import com.mongodb.BasicDBObject; import com.mongodb.gridfs.GridFS; import com.mongodb.gridfs.GridFSInputFile; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import mx.org.cedn.avisosconagua.engine.Processor; import mx.org.cedn.avisosconagua.exceptions.AvisosException; import mx.org.cedn.avisosconagua.mongo.MongoInterface; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; /** * Workflow processor to display the cyclone development forecast web form. * @author serch */ public class Pronostico implements Processor { /** Max allowed size for uploaded files **/ private static final int MAX_SIZE = 2 * 1024 * 1024; @Override public void invokeForm(HttpServletRequest request, HttpServletResponse response, BasicDBObject data, String parts[]) throws ServletException, IOException { HashMap<String, String> datos = new HashMap<>(); String prevIssue = null; if (null != data) { for (String key : data.keySet()) { datos.put(key, data.getString(key)); //System.out.println("colocando: "+key+" : "+datos.get(key)); } } //Put nhcLinks in map BasicDBObject advice = MongoInterface.getInstance() .getAdvice((String) request.getSession(true).getAttribute("internalId")); if (null != advice) { //Get nhcLinks BasicDBObject section = (BasicDBObject) advice.get("precapture"); if (null != section) { datos.put("nhcForecastLink", section.getString("nhcForecastLink")); datos.put("nhcPublicLink", section.getString("nhcPublicLink")); prevIssue = section.getString("previousIssue"); } } //Advice without pronostico saved and for tracking if (advice != null && advice.get("pronostico") == null) { if (prevIssue != null) { BasicDBObject previous = MongoInterface.getInstance().getAdvice(prevIssue); if (previous != null) { //System.out.println("Putting previous data from "+prevIssue); BasicDBObject forecastSection = (BasicDBObject) previous.get("pronostico"); if (forecastSection != null) { //Set current values to previous values datos.put("issueSateliteLocationImgFooter", forecastSection.getString("issueSateliteLocationImgFooter", "")); } } } } request.setAttribute("data", datos); request.setAttribute("bulletinType", parts[2]); String url = "/jsp/forecast.jsp"; RequestDispatcher rd = request.getRequestDispatcher(url); rd.forward(request, response); } @Override public void processForm(HttpServletRequest request, String[] parts, String currentId) throws ServletException, IOException { HashMap<String, String> parametros = new HashMap<>(); boolean fileflag = false; AvisosException aex = null; if (ServletFileUpload.isMultipartContent(request)) { try { DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(MAX_SIZE); ServletFileUpload upload = new ServletFileUpload(factory); upload.setSizeMax(MAX_SIZE); List<FileItem> items = upload.parseRequest(request); String filename = null; for (FileItem item : items) { if (!item.isFormField() && item.getSize() > 0) { filename = processUploadedFile(item, currentId); parametros.put(item.getFieldName(), filename); } else { //System.out.println("item:" + item.getFieldName() + "=" + item.getString()); parametros.put(item.getFieldName(), new String(item.getString().getBytes("ISO8859-1"), "UTF-8")); } } } catch (FileUploadException fue) { fue.printStackTrace(); fileflag = true; aex = new AvisosException("El archivo sobrepasa el tamao de " + MAX_SIZE + " bytes", fue); } } else { for (Map.Entry<String, String[]> entry : request.getParameterMap().entrySet()) { try { parametros.put(entry.getKey(), new String(request.getParameter(entry.getKey()).getBytes("ISO8859-1"), "UTF-8")); } catch (UnsupportedEncodingException ue) { //No debe llegar a este punto assert false; } } } BasicDBObject anterior = (BasicDBObject) MongoInterface.getInstance().getAdvice(currentId).get(parts[3]); procesaImagen(parametros, anterior); MongoInterface.getInstance().savePlainData(currentId, parts[3], parametros); if (fileflag) { throw aex; } } /** * Processes an uploaded file and stores it in MongoDB. * @param item file item from the parsed servlet request * @param currentId ID for the current MongoDB object for the advice * @return file name * @throws IOException */ private String processUploadedFile(FileItem item, String currentId) throws IOException { GridFS gridfs = MongoInterface.getInstance().getImagesFS(); GridFSInputFile gfsFile = gridfs.createFile(item.getInputStream()); String filename = currentId + ":" + item.getFieldName() + "_" + item.getName(); gfsFile.setFilename(filename); gfsFile.setContentType(item.getContentType()); gfsFile.save(); return filename; } /** * Updates uploaded images from the web form. * @param parametros new advice properties * @param anterior previous advice properties */ private void procesaImagen(HashMap<String, String> parametros, BasicDBObject anterior) { if (null == parametros.get("issueSateliteLocationImg") || "".equals(parametros.get("issueSateliteLocationImg").trim())) { if (null != anterior && null != anterior.getString("issueSateliteLocationImg")) { parametros.put("issueSateliteLocationImg", anterior.getString("issueSateliteLocationImg")); } } } }