InterfaceHandler


1   /*
2    * Copyright 2005 Joe Walker
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.directwebremoting.servlet;
17  
18  import java.io.IOException  ;
19  import java.io.PrintWriter  ;
20  
21  import javax.servlet.http.HttpServletRequest  ;
22  import javax.servlet.http.HttpServletResponse  ;
23  
24  import org.directwebremoting.extend.Handler;
25  import org.directwebremoting.extend.Remoter;
26  import org.directwebremoting.util.LocalUtil;
27  import org.directwebremoting.util.MimeConstants;
28  
29  /**
30   * A handler for interface generation requests
31   * @author Joe Walker [joe at getahead dot ltd dot uk]
32   */
33  public class InterfaceHandler implements Handler
34  {
35      /* (non-Javadoc)
36       * @see org.directwebremoting.Handler#handle(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
37       */
38      public void handle(HttpServletRequest   request, HttpServletResponse   response) throws IOException  
39      {
40          String   scriptName = request.getPathInfo();
41          scriptName = LocalUtil.replace(scriptName, interfaceHandlerUrl, "");
42          scriptName = LocalUtil.replace(scriptName, PathConstants.EXTENSION_JS, "");
43          String   path = request.getContextPath() + request.getServletPath();
44  
45          String   script = remoter.generateInterfaceScript(scriptName, path);
46  
47          // Officially we should use MimeConstants.MIME_JS, but if we cheat and
48          // use MimeConstants.MIME_PLAIN then it will be easier to read in a
49          // browser window, and will still work just fine.
50          response.setContentType(MimeConstants.MIME_PLAIN);
51          PrintWriter   out = response.getWriter();
52          out.print(script);
53      }
54  
55      /**
56       * Setter for the remoter
57       * @param remoter
58       */
59      public void setRemoter(Remoter remoter)
60      {
61          this.remoter = remoter;
62      }
63  
64      /**
65       * The bean to execute remote requests and generate interfaces
66       */
67      protected Remoter remoter = null;
68  
69      /**
70       * Setter for the URL that this handler available on
71       * @param interfaceHandlerUrl the interfaceHandlerUrl to set
72       */
73      public void setInterfaceHandlerUrl(String   interfaceHandlerUrl)
74      {
75          this.interfaceHandlerUrl = interfaceHandlerUrl;
76      }
77  
78      /**
79       * What URL is this handler available on?
80       */
81      protected String   interfaceHandlerUrl;
82  }
83
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