View Javadoc

1   /*
2    * $Id: HttpRequestToParameter.java 12362 2008-07-16 16:22:55Z dirk.olmes $
3    * --------------------------------------------------------------------------------------
4    * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.com
5    *
6    * The software in this package is published under the terms of the CPAL v1.0
7    * license, a copy of which has been included with this distribution in the
8    * LICENSE.txt file.
9    */
10  
11  package org.mule.transport.servlet;
12  
13  import org.mule.api.MuleMessage;
14  import org.mule.api.transformer.TransformerException;
15  import org.mule.transformer.AbstractMessageAwareTransformer;
16  import org.mule.util.SystemUtils;
17  
18  import java.io.BufferedReader;
19  import java.io.IOException;
20  import java.io.InputStream;
21  import java.io.InputStreamReader;
22  
23  import javax.servlet.http.HttpServletRequest;
24  
25  public class HttpRequestToParameter extends AbstractMessageAwareTransformer
26  {
27  
28      public HttpRequestToParameter()
29      {
30          registerSourceType(Object.class);
31          setReturnClass(String.class);
32      }
33  
34      public Object transform(MuleMessage message, String outputEncoding) throws TransformerException
35      {
36          HttpServletRequest request = ((HttpRequestMessageAdapter) message.getAdapter()).getRequest();
37  
38          String payloadParam = (String)request.getAttribute(AbstractReceiverServlet.PAYLOAD_PARAMETER_NAME);
39          if (null == payloadParam)
40          {
41              payloadParam = AbstractReceiverServlet.DEFAULT_PAYLOAD_PARAMETER_NAME;
42          }
43  
44          String payload = request.getParameter(payloadParam);
45          if (null == payload)
46          {
47              if (isText(request.getContentType()))
48              {
49                  try
50                  {
51                      InputStream is = (InputStream) message.getPayload();
52                      BufferedReader reader = new BufferedReader(new InputStreamReader(is, request.getCharacterEncoding()));
53                      StringBuffer buffer = new StringBuffer(8192);
54                      String line = reader.readLine();
55                      while (line != null)
56                      {
57                          buffer.append(line);
58                          line = reader.readLine();
59                          if (line != null) buffer.append(SystemUtils.LINE_SEPARATOR);
60                      }
61                      payload = buffer.toString();
62                  }
63                  catch (IOException e)
64                  {
65                      throw new TransformerException(this, e);
66                  }
67              }
68          }
69  
70          return payload;
71      }
72  
73      protected boolean isText(String contentType)
74      {
75          if (contentType == null)
76          {
77              return true;
78          }
79          return (contentType.startsWith("text/"));
80      }
81  
82  }