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16 package org.mortbay.jetty.servlet;
17
18
19 import java.io.IOException  ;
20 import java.util.Enumeration ;
21 import java.util.HashMap ;
22 import java.util.Map ;
23
24 import javax.servlet.ServletContext ;
25 import javax.servlet.ServletException ;
26 import javax.servlet.UnavailableException ;
27 import javax.servlet.http.HttpServlet ;
28 import javax.servlet.http.HttpServletRequest ;
29 import javax.servlet.http.HttpServletRequestWrapper ;
30 import javax.servlet.http.HttpServletResponse ;
31
32 import org.apache.commons.logging.Log;
33 import org.mortbay.log.LogFactory;
34 import org.mortbay.util.LogSupport;
35 import org.mortbay.util.URI;
36
37
38
59 public class Invoker extends HttpServlet
60 {
61 private static Log log = LogFactory.getLog(Invoker.class);
62
63 private ServletHandler _servletHandler;
64 private Map.Entry _invokerEntry;
65 private Map _parameters;
66 private boolean _nonContextServlets;
67 private boolean _verbose;
68
69
70 public void init()
71 {
72 ServletContext config=getServletContext();
73 _servletHandler=((ServletHandler.Context)config).getServletHandler();
74
75 Enumeration e = getInitParameterNames();
76 while(e.hasMoreElements())
77 {
78 String param=(String )e.nextElement();
79 String value=getInitParameter(param);
80 String lvalue=value.toLowerCase();
81 if ("nonContextServlets".equals(param))
82 {
83 _nonContextServlets=value.length()>0 && lvalue.startsWith("t");
84 }
85 if ("verbose".equals(param))
86 {
87 _verbose=value.length()>0 && lvalue.startsWith("t");
88 }
89 else
90 {
91 if (_parameters==null)
92 _parameters=new HashMap ();
93 _parameters.put(param,value);
94 }
95 }
96 }
97
98
99 protected void service(HttpServletRequest request, HttpServletResponse response)
100 throws ServletException , IOException
101 {
102 boolean included=false;
104 String servlet_path=(String )request.getAttribute(Dispatcher.__INCLUDE_SERVLET_PATH);
105 if (servlet_path==null)
106 servlet_path=request.getServletPath();
107 else
108 included=true;
109 String path_info = (String )request.getAttribute(Dispatcher.__INCLUDE_PATH_INFO);
110 if (path_info==null)
111 path_info=request.getPathInfo();
112
113 String servlet = path_info;
115 if (servlet==null || servlet.length()<=1 )
116 {
117 response.sendError(404);
118 return;
119 }
120
121 int i0=servlet.charAt(0)=='/'?1:0;
122 int i1=servlet.indexOf('/',i0);
123 servlet=i1<0?servlet.substring(i0):servlet.substring(i0,i1);
124
125 ServletHolder holder=_servletHandler.getServletHolder(servlet);
127 if (holder!=null)
128 {
129 _servletHandler.addServletHolder(holder);
131 _servletHandler.mapPathToServlet(URI.addPaths(servlet_path,servlet)+"/*", holder.getName());
132 }
133 else
134 {
135 if (servlet.endsWith(".class"))
137 servlet=servlet.substring(0,servlet.length()-6);
138 if (servlet==null || servlet.length()==0)
139 {
140 response.sendError(404);
141 return;
142 }
143
144 synchronized(_servletHandler)
145 {
146 if (_invokerEntry==null)
148 _invokerEntry=_servletHandler.getHolderEntry(servlet_path);
149
150 String path=URI.addPaths(servlet_path,servlet);
152 Map.Entry entry = _servletHandler.getHolderEntry(path);
153
154 if (entry!=null && entry!=_invokerEntry)
155 {
156 holder=(ServletHolder)entry.getValue();
158 }
159 else
160 {
161 holder=new ServletHolder(_servletHandler,servlet,servlet);
163
164 if (_parameters!=null)
165 holder.putAll(_parameters);
166
167 try {holder.start();}
168 catch (Exception e)
169 {
170 log.debug(LogSupport.EXCEPTION,e);
171 throw new UnavailableException (e.toString());
172 }
173
174 if (!_nonContextServlets)
176 {
177 Object s=holder.getServlet();
178
179 if (_servletHandler.getClassLoader()!=
180 s.getClass().getClassLoader())
181 {
182 holder.stop();
183 log.warn("Dynamic servlet "+s+
184 " not loaded from context "+
185 request.getContextPath());
186 throw new UnavailableException ("Not in context");
187 }
188 }
189
190 if (_verbose)
192 log("Dynamic load '"+servlet+"' at "+path);
193 _servletHandler.addServletHolder(holder);
194 _servletHandler.mapPathToServlet(path+"/*",holder.getName());
195 _servletHandler.mapPathToServlet(path+".class/*",holder.getName());
196 }
197 }
198
199 }
200
201 if (holder!=null)
202 holder.handle(new Request (request,included,servlet,servlet_path,path_info),
203 response);
204 else
205 response.sendError(404);
206
207 }
208
209
210 class Request extends HttpServletRequestWrapper
211 {
212 String _servletPath;
213 String _pathInfo;
214 boolean _included;
215
216
217 Request(HttpServletRequest request,
218 boolean included,
219 String name,
220 String servletPath,
221 String pathInfo)
222 {
223 super(request);
224 _included=included;
225 _servletPath=URI.addPaths(servletPath,name);
226 _pathInfo=pathInfo.substring(name.length()+1);
227 if (_pathInfo.length()==0)
228 _pathInfo=null;
229 }
230
231
232 public String getServletPath()
233 {
234 if (_included)
235 return super.getServletPath();
236 return _servletPath;
237 }
238
239
240 public String getPathInfo()
241 {
242 if (_included)
243 return super.getPathInfo();
244 return _pathInfo;
245 }
246
247
248 public Object getAttribute(String name)
249 {
250 if (_included)
251 {
252 if (name.equals(Dispatcher.__INCLUDE_REQUEST_URI))
253 return URI.addPaths(URI.addPaths(getContextPath(),_servletPath),_pathInfo);
254 if (name.equals(Dispatcher.__INCLUDE_PATH_INFO))
255 return _pathInfo;
256 if (name.equals(Dispatcher.__INCLUDE_SERVLET_PATH))
257 return _servletPath;
258 }
259 return super.getAttribute(name);
260 }
261 }
262 }
263 |
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