| commit | author | age | ||
| c583a8 | 1 | /* |
| U | 2 | * To change this license header, choose License Headers in Project Properties. |
| 3 | * To change this template file, choose Tools | Templates | |
| 4 | * and open the template in the editor. | |
| 5 | */ | |
| 6 | package de.uhilger.wbx.web; | |
| 7 | ||
| 8 | import java.io.IOException; | |
| 9 | import java.io.PrintWriter; | |
| 10 | import java.util.logging.Level; | |
| 11 | import java.util.logging.Logger; | |
| 12 | import javax.naming.Context; | |
| 13 | import javax.naming.InitialContext; | |
| 14 | import javax.naming.NamingException; | |
| 15 | import javax.servlet.ServletContext; | |
| 16 | import javax.servlet.ServletException; | |
| 17 | import javax.servlet.http.HttpServlet; | |
| 18 | import javax.servlet.http.HttpServletRequest; | |
| 19 | import javax.servlet.http.HttpServletResponse; | |
| 20 | ||
| 21 | /** | |
| 22 | * | |
| 23 | */ | |
| 24 | public class TestServlet extends HttpServlet { | |
| 25 | ||
| 26 | private static final Logger logger = Logger.getLogger(TestServlet.class.getName()); | |
| 27 | ||
| 28 | public static final String JNDI_CTX_NAME = "java:comp/env"; | |
| 29 | public static final String PARAM_NAME = "wbxFileBase"; | |
| 30 | public static final String NOT_FOUND = " nicht gefunden"; | |
| 31 | public static final String NO_STRING = " ist kein String"; | |
| 32 | ||
| 33 | /** | |
| 34 | * Processes requests for both HTTP <code>GET</code> and <code>POST</code> | |
| 35 | * methods. | |
| 36 | * | |
| 37 | * @param request servlet request | |
| 38 | * @param response servlet response | |
| 39 | * @throws ServletException if a servlet-specific error occurs | |
| 40 | * @throws IOException if an I/O error occurs | |
| 41 | */ | |
| 42 | protected void processRequest(HttpServletRequest request, HttpServletResponse response) | |
| 43 | throws ServletException, IOException { | |
| 44 | response.setContentType("text/html;charset=UTF-8"); | |
| 45 | try (PrintWriter out = response.getWriter()) { | |
| 46 | out.println("<!DOCTYPE html>"); | |
| 47 | out.println("<html>"); | |
| 48 | out.println("<head>"); | |
| 49 | out.println("<title>Servlet TestServlet</title>"); | |
| 50 | out.println("</head>"); | |
| 51 | out.println("<body>"); | |
| 52 | out.println("<h1>Servlet TestServlet at " + request.getContextPath() + "</h1>"); | |
| 53 | ||
| 54 | // hier kommt veraenderlicher Inhalt | |
| 828ffa | 55 | ServletContext ctx = request.getSession().getServletContext(); |
| c583a8 | 56 | Object o = ctx.getAttribute("filebase"); |
| U | 57 | String base; |
| 58 | if(o instanceof String) { | |
| 59 | base = o.toString(); | |
| 60 | } else { | |
| 61 | base = "unbekannt"; | |
| 62 | } | |
| 63 | out.print("<p>filebase: "); | |
| 64 | out.print(base); | |
| 65 | out.print("</p>\n"); | |
| 66 | ||
| 67 | out.print("<p>"); | |
| 68 | out.print(PARAM_NAME); | |
| 69 | out.print(": "); | |
| 70 | out.print(getJNDIParameter(PARAM_NAME)); | |
| 71 | out.print("</p>\n"); | |
| 72 | ||
| 73 | out.print("<p>"); | |
| 74 | out.print("Request URL: "); | |
| 75 | out.print(request.getRequestURL()); | |
| 76 | out.print("</p>\n"); | |
| 77 | // Ende des veraenderlichen Inhalts | |
| 78 | ||
| 79 | out.println("</body>"); | |
| 80 | out.println("</html>"); | |
| 81 | } | |
| 82 | } | |
| 83 | ||
| 84 | private String getJNDIParameter(String pname) { | |
| 85 | try { | |
| 86 | // unseren environment naming context ermitteln | |
| 87 | Context initCtx = new InitialContext(); | |
| 88 | Context envCtx = (Context) initCtx.lookup(JNDI_CTX_NAME); | |
| 89 | ||
| 90 | // unseren Parameter lesen | |
| 91 | Object o = envCtx.lookup(pname); | |
| 92 | if(o instanceof String) { | |
| 93 | return o.toString(); | |
| 94 | } else { | |
| 95 | return NO_STRING; | |
| 96 | } | |
| 97 | } catch (NamingException ex) { | |
| 98 | logger.log(Level.SEVERE, ex.getMessage()); | |
| 99 | return NOT_FOUND; | |
| 100 | } | |
| 101 | } | |
| 102 | ||
| 103 | ||
| 104 | // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> | |
| 105 | /** | |
| 106 | * Handles the HTTP <code>GET</code> method. | |
| 107 | * | |
| 108 | * @param request servlet request | |
| 109 | * @param response servlet response | |
| 110 | * @throws ServletException if a servlet-specific error occurs | |
| 111 | * @throws IOException if an I/O error occurs | |
| 112 | */ | |
| 113 | @Override | |
| 114 | protected void doGet(HttpServletRequest request, HttpServletResponse response) | |
| 115 | throws ServletException, IOException { | |
| 116 | processRequest(request, response); | |
| 117 | } | |
| 118 | ||
| 119 | /** | |
| 120 | * Handles the HTTP <code>POST</code> method. | |
| 121 | * | |
| 122 | * @param request servlet request | |
| 123 | * @param response servlet response | |
| 124 | * @throws ServletException if a servlet-specific error occurs | |
| 125 | * @throws IOException if an I/O error occurs | |
| 126 | */ | |
| 127 | @Override | |
| 128 | protected void doPost(HttpServletRequest request, HttpServletResponse response) | |
| 129 | throws ServletException, IOException { | |
| 130 | processRequest(request, response); | |
| 131 | } | |
| 132 | ||
| 133 | /** | |
| 134 | * Returns a short description of the servlet. | |
| 135 | * | |
| 136 | * @return a String containing servlet description | |
| 137 | */ | |
| 138 | @Override | |
| 139 | public String getServletInfo() { | |
| 140 | return "Short description"; | |
| 141 | }// </editor-fold> | |
| 142 | ||
| 143 | } | |
