From 54bbae3b0cdf11bb776ba7360fba2f690d6cfd50 Mon Sep 17 00:00:00 2001
From: ulrich
Date: Tue, 31 Jan 2017 08:27:16 +0000
Subject: [PATCH] Datenbankzugriff in der Herstellungsbeschreibung ergänzt

---
 src/java/de/uhilger/um/web/NiceFilter.java |   37 +++++++++++++++++++++++++++++++++----
 1 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/src/java/de/uhilger/um/web/NiceFilter.java b/src/java/de/uhilger/um/web/NiceFilter.java
index 61d5a39..c0d120b 100644
--- a/src/java/de/uhilger/um/web/NiceFilter.java
+++ b/src/java/de/uhilger/um/web/NiceFilter.java
@@ -1,8 +1,21 @@
 /*
- * To change this license header, choose License Headers in Project Properties.
- * To change this template file, choose Tools | Templates
- * and open the template in the editor.
+ *  Nutzerverwaltung - User and role management in your browser
+ *  Copyright (C) 2011-2016 Ulrich Hilger, http://uhilger.de
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see http://www.gnu.org/licenses/
  */
+
 package de.uhilger.um.web;
 
 import java.io.IOException;
@@ -19,19 +32,35 @@
  * @author hilgeru
  */
 public class NiceFilter implements Filter {
+  
+  private static final String ZIEL = "../api?c=de.uhilger.um.api.UserMgr&m=";
 
   @Override
   public void init(FilterConfig filterConfig) throws ServletException {
     // ...
   }
 
+  /*
+    hier wird ein URL wie z.B. 
+    http]://example.com/um/svc/testmethode
+    umgesetzt auf
+    http]://example.com/um/api?c=de.uhilger.um.api.UserMgr&m=testmethode
+  
+    der Teil 'svc' ist im Filter Mapping des Deployment Descriptor 
+    deklariert. Der Teil 'api' zeigt mit Hilfe eines Servlet 
+    Mappings im Deployment Descriptor auf das Transit-Servlet.
+  
+    der statische Teil des Ziel-URL ist hier hart kodiert, das kann man 
+    freilich je nach Bedarf noch dynamisch gestalten
+  */
+  
   @Override
   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
     if(request instanceof HttpServletRequest) {
       HttpServletRequest hr = (HttpServletRequest) request;
       String servletPath = hr.getServletPath();
       String[] path = servletPath.split("/");
-      request.getRequestDispatcher("../api?c=de.uhilger.um.api.UserMgr&m=" + path[2]).forward(request, response);
+      request.getRequestDispatcher(ZIEL + path[2]).forward(request, response);
     }
   }
 

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