Java tutorial
/* * OpenProdoc * * See the help doc files distributed with * this work for additional information regarding copyright ownership. * Joaquin Hierro licenses this file to You under: * * License GNU GPL v3 http://www.gnu.org/licenses/gpl.html * * you may not use this file except in compliance with the License. * Unless agreed to in writing, software 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. * * author: Joaquin Hierro 2011 * */ /* * Oper.java * * Created on 29-ene-2014, 0:52:22 */ package OpenProdocServ; import OpenProdocUI.SParent; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Date; import java.util.HashMap; import java.util.Iterator; import java.util.List; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import prodoc.DriverGeneric; import prodoc.DriverRemote; import prodoc.PDDocs; import prodoc.PDException; import prodoc.PDLog; import prodoc.PDMimeType; import prodoc.ProdocFW; /** * * @author jhierrot */ public class Oper extends HttpServlet { protected static String ProdocProperRef = null; private static boolean FWStartted = false; /** Initializes the servlet. * @param config * @throws ServletException */ public void init(ServletConfig config) throws ServletException { super.init(config); } //----------------------------------------------------------------------------------------------- /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods. * @param request servlet request * @param response servlet response * @throws ServletException * @throws IOException */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/xml;charset=UTF-8"); response.setStatus(HttpServletResponse.SC_OK); try { if (!FWStartted) { StartFW(); FWStartted = true; } if (PDLog.isDebug()) PDLog.Debug("##########################################################################"); if (Connected(request) && request.getContentType().contains("multipart")) { InsFile(request, response); return; } if (request.getParameter(DriverRemote.ORDER) == null) { PrintWriter out = response.getWriter(); Answer(request, out, "<OPD><Result>KO</Result><Msg>Disconnected</Msg></OPD>"); out.close(); return; } String Order = request.getParameter(DriverRemote.ORDER); if (Connected(request) && Order.equals(DriverGeneric.S_RETRIEVEFILE)) { SendFile(request, response); return; } if (Connected(request) || Order.equals(DriverGeneric.S_LOGIN)) { PrintWriter out = response.getWriter(); ProcessPage(request, out); out.close(); } else { PrintWriter out = response.getWriter(); Answer(request, out, false, "<OPD><Result>KO</Result><Msg>Disconnected</Msg></OPD>", null); out.close(); } } catch (Exception e) { PrintWriter out = response.getWriter(); AddLog(e.getMessage()); Answer(request, out, false, e.getMessage(), null); out.close(); } } //----------------------------------------------------------------------------------------------- /** * * @param Req * @param out * @param Ok Result of operation * @param Message Optional Message * @param Data Optional XML Data */ static public void Answer(HttpServletRequest Req, PrintWriter out, boolean Ok, String Message, String Data) { out.println("<OPD>"); out.println("<Result>" + (Ok ? "OK" : "KO") + "</Result>"); if (Message != null && Message.length() != 0) out.println("<Msg>" + Message.replace('<', '^') + "</Msg>"); if (Data != null && Data.length() != 0) out.println("<Data>" + Data + "</Data>"); if (PDLog.isDebug()) { PDLog.Debug("Answer:<Result>" + (Ok ? "OK" : "KO") + "</Result>"); if (Message != null && Message.length() != 0) PDLog.Debug("<Msg>" + Message + "</Msg>"); if (Data != null && Data.length() != 0) PDLog.Debug("<Data>" + Data + "</Data>"); } out.println("</OPD>"); } //----------------------------------------------------------------------------------------------- /** * * @param Req * @param out * @param AllMessage */ static public void Answer(HttpServletRequest Req, PrintWriter out, String AllMessage) { if (PDLog.isDebug()) PDLog.Debug("Answer:" + AllMessage); out.println(AllMessage); } //----------------------------------------------------------------------------------------------- /** * * @param Texto */ protected void AddLog(String Texto) { System.out.println(">> " + this.getServletName() + ":" + new Date() + "=" + Texto); } //----------------------------------------------------------------------------------------------- /** * * @param Req * @return * @throws PDException */ protected boolean Connected(HttpServletRequest Req) throws Exception { if (getSessOPD(Req) == null) return (false); else return (true); } //----------------------------------------------------------------------------------------------- /** * * @param Req * @param out * @throws Exception */ protected void ProcessPage(HttpServletRequest Req, PrintWriter out) throws Exception { String Order = Req.getParameter(DriverRemote.ORDER); String Param = Req.getParameter(DriverRemote.PARAM); if (PDLog.isDebug()) { PDLog.Debug("From:" + Req.getRemoteHost() + "/" + Req.getRemoteHost() + ":" + Req.getRemoteUser()); PDLog.Debug("Order:" + Order); PDLog.Debug("Param:" + Param); } DocumentBuilder DB = DocumentBuilderFactory.newInstance().newDocumentBuilder(); Document XMLObjects = DB.parse(new ByteArrayInputStream(Param.getBytes("UTF-8"))); if (Order.equals(DriverGeneric.S_LOGIN)) { NodeList OPDObjectList = XMLObjects.getElementsByTagName("U"); Node OPDObject = OPDObjectList.item(0); String User = OPDObject.getTextContent(); OPDObjectList = XMLObjects.getElementsByTagName("C"); OPDObject = OPDObjectList.item(0); String Pass = OPDObject.getTextContent(); DriverGeneric D = ProdocFW.getSession("PD", User, Pass); Req.getSession().setAttribute("PRODOC_SESS", D); Answer(Req, out, true, null, null); return; } else if (Order.equals(DriverGeneric.S_UNLOCK)) { getSessOPD(Req).UnLock(); Req.getSession().setAttribute("PRODOC_SESS", null); Answer(Req, out, true, null, null); return; } DriverGeneric D = getSessOPD(Req); String Results = D.RemoteOrder(Order, XMLObjects); Answer(Req, out, Results); XMLObjects = null; DB.reset(); } //----------------------------------------------------------------------------------------------- /** Handles the HTTP <code>GET</code> method. * @param request servlet request * @param response servlet response * @throws ServletException * @throws IOException */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } //----------------------------------------------------------------------------------------------- /** Handles the HTTP <code>POST</code> method. * @param request servlet request * @param response servlet response * @throws ServletException * @throws IOException */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } //----------------------------------------------------------------------------------------------- /** Returns a short description of the servlet. * @return */ @Override public String getServletInfo() { return "Servlet for Oper"; } //----------------------------------------------------------------------------------------------- /** * * @return */ static public String getUrlServlet() { return ("Oper"); } //---------------------------------------------------------- /** * * @param Req * @return */ public static DriverGeneric getSessOPD(HttpServletRequest Req) { return (DriverGeneric) Req.getSession(true).getAttribute("PRODOC_SESS"); } //-------------------------------------------------------------- /** * * @param Req * @param OPDSess */ public static void setSessOPD(HttpServletRequest Req, DriverGeneric OPDSess) { Req.getSession().setAttribute("PRODOC_SESS", OPDSess); } //-------------------------------------------------------------- /** * * @return */ static public String getVersion() { return ("0.9"); } //----------------------------------------------------------------------------------------------- private void StartFW() throws Exception { ProdocFW.InitProdoc("PD", SParent.getProdocProperRef()); } //---------------------------------------------------------- private void SendFile(HttpServletRequest Req, HttpServletResponse response) throws Exception { String Param = Req.getParameter(DriverRemote.PARAM); if (PDLog.isDebug()) PDLog.Debug("SendFile Param:" + Param); DocumentBuilder DB = DocumentBuilderFactory.newInstance().newDocumentBuilder(); Document XMLObjects = DB.parse(new ByteArrayInputStream(Param.getBytes("UTF-8"))); NodeList OPDObjectList = XMLObjects.getElementsByTagName("Id"); Node OPDObject = OPDObjectList.item(0); String Id = OPDObject.getTextContent(); OPDObjectList = XMLObjects.getElementsByTagName("Ver"); OPDObject = OPDObjectList.item(0); String Ver = OPDObject.getTextContent(); DB.reset(); PDDocs doc = new PDDocs(getSessOPD(Req)); doc.setPDId(Id); if (Ver != null && Ver.length() != 0) doc.LoadVersion(Id, Ver); else doc.LoadCurrent(Id); ServletOutputStream out = response.getOutputStream(); PDMimeType mt = new PDMimeType(getSessOPD(Req)); mt.Load(doc.getMimeType()); response.setContentType(mt.getMimeCode()); response.setHeader("Content-disposition", "inline; filename=" + doc.getName()); try { if (Ver != null && Ver.length() != 0) doc.getStreamVer(out); else doc.getStream(out); } catch (Exception e) { out.close(); throw e; } out.close(); } //---------------------------------------------------------- /** * * @param request * @param response */ private void InsFile(HttpServletRequest Req, HttpServletResponse response) throws Exception { if (PDLog.isDebug()) PDLog.Debug("InsFile"); FileItem ItemFile = null; InputStream FileData = null; HashMap ListFields = new HashMap(); DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(1000000); ServletFileUpload upload = new ServletFileUpload(factory); List items = upload.parseRequest(Req); Iterator iter = items.iterator(); while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); if (item.isFormField()) ListFields.put(item.getFieldName(), item.getString()); else { FileData = item.getInputStream(); ItemFile = item; } } DriverGeneric PDSession = getSessOPD(Req); String Id = (String) ListFields.get("Id"); String Ver = (String) ListFields.get("Ver"); PDSession.InsertFile(Id, Ver, FileData); if (FileData != null) FileData.close(); if (ItemFile != null) ItemFile.delete(); items.clear(); // to help and speed gc PrintWriter out = response.getWriter(); Answer(Req, out, true, null, null); out.close(); } //---------------------------------------------------------- }