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1
64
65 package com.jcorporate.expresso.core.servlet;
66
67 import com.jcorporate.expresso.core.misc.ConfigManager;
68 import com.jcorporate.expresso.core.misc.ConfigPathFixedParam;
69 import com.jcorporate.expresso.core.misc.ConfigPathMapping;
70 import com.jcorporate.expresso.core.misc.ConfigPathParam;
71 import com.jcorporate.expresso.core.misc.ConfigurationException;
72 import org.apache.log4j.Logger;
73 import org.apache.oro.text.regex.Pattern;
74 import org.apache.oro.text.regex.PatternMatcher;
75 import org.apache.oro.text.regex.Perl5Matcher;
76
77 import javax.servlet.RequestDispatcher  ;
78 import javax.servlet.ServletException ;
79 import javax.servlet.http.HttpServletRequest ;
80 import javax.servlet.http.HttpServletResponse ;
81 import java.io.IOException ;
82 import java.util.Enumeration ;
83 import java.util.StringTokenizer ;
84 import java.util.Vector ;
85
86
87
92 public class PathHandler
93 extends DBServlet {
94 private static Logger log = Logger.getLogger(PathHandler.class);
95 private static PatternMatcher matcher = new Perl5Matcher();
96
97 public PathHandler() {
98 }
99
100
103 private static void setupLog() {
104 }
105
106
112 private void process(HttpServletRequest req, HttpServletResponse res)
113 throws ServletException , IOException {
114 String originalPath = req.getPathInfo();
115
116 try {
117 for (Enumeration e = ConfigManager.getContext(getDBName(req)).getPathMappings().elements();
118 e.hasMoreElements();) {
119 ConfigPathMapping oneMapping = (ConfigPathMapping) e.nextElement();
120 if (log.isDebugEnabled()) {
121 log.debug("Mapping:" + oneMapping.getUrlPattern() + ", " +
122 oneMapping.getPath());
123 }
124
125 if (log.isDebugEnabled()) {
126 for (Enumeration ep = oneMapping.getParams().elements();
127 ep.hasMoreElements();) {
128 ConfigPathParam oneParam = (ConfigPathParam) ep.
129 nextElement();
130 log.debug("-- Param:" + oneParam.getNumber() + ", " +
131 oneParam.getName());
132 }
133 }
134
135 if (log.isDebugEnabled()) {
136 for (Enumeration epf = oneMapping.getFixedParams().elements();
137 epf.hasMoreElements();) {
138 ConfigPathFixedParam oneFixedParam = (ConfigPathFixedParam) epf.nextElement();
139 log.debug("-- Fixed:" + oneFixedParam.getName() + ", " +
140 oneFixedParam.getValue());
141 }
142 }
143
144 Pattern p = oneMapping.getCompiledUrlPattern();
145
146 boolean result;
147 synchronized (matcher) {
148 result = matcher.matches(originalPath, p);
149 }
150
151 if (result) {
152 log.debug("Path Matches!");
153 redirect(req, res, oneMapping);
154 }
155 }
156 } catch (ConfigurationException ce) {
157 throw new ServletException (ce.getMessage());
158 }
159 }
160
161 private void redirect(HttpServletRequest req, HttpServletResponse res,
162 ConfigPathMapping mapping)
163 throws ServletException , IOException {
164 String queryString = req.getQueryString();
165 String originalPath = req.getPathInfo();
166
167 if (log.isDebugEnabled()) {
168 log.debug("Path:" + originalPath);
169 log.debug("Query:" + queryString);
170 }
171
172 Vector params = new Vector ();
173 StringTokenizer stk = new StringTokenizer (originalPath, "/");
174
175 while (stk.hasMoreElements()) {
176 params.addElement(stk.nextElement());
177 }
178
179 ConfigPathParam oneParam = null;
180 ConfigPathFixedParam oneFixedParam = null;
181 int numberNeeded = 0;
182 boolean needAmpersand = false;
183 StringBuffer newURL = new StringBuffer (mapping.getPath() + "?");
184
185 for (Enumeration ep = mapping.getParams().elements();
186 ep.hasMoreElements();) {
187 oneParam = (ConfigPathParam) ep.nextElement();
188
189 if (needAmpersand) {
190 newURL.append("&");
191 }
192
193 numberNeeded = oneParam.getNumber();
194
195 if (numberNeeded <= params.size()) {
196 newURL.append(oneParam.getName() + "=" +
197 params.elementAt(numberNeeded));
198 }
199
200 needAmpersand = true;
201 }
202 for (Enumeration efp = mapping.getFixedParams().elements();
203 efp.hasMoreElements();) {
204 if (needAmpersand) {
205 newURL.append("&");
206 }
207
208 oneFixedParam = (ConfigPathFixedParam) efp.nextElement();
209 newURL.append(oneFixedParam.getName() + "=" +
210 oneFixedParam.getValue());
211 }
212
213
214 log.debug("New URL:" + newURL);
215
216 RequestDispatcher rd = getServletConfig().getServletContext().getRequestDispatcher(newURL.toString());
217
218 if (rd == null) {
219 throw new ServletException ("Can't forward");
220 }
221
222 rd.forward(req, res);
223 }
224
225
229 public void doGet(HttpServletRequest request, HttpServletResponse response)
230 throws ServletException , IOException {
231 super.doGet(request, response);
232 setupLog();
233 process(request, response);
234 }
235
236
237
241 public void doPost(HttpServletRequest request,
242 HttpServletResponse response)
243 throws ServletException , IOException {
244 super.doGet(request, response);
245 setupLog();
246 process(request, response);
247 }
248
249
250 } |
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