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Java > Open Source Codes > org > riotfamily > forms > fileupload > FormsMultipartResolver


1 /* ***** BEGIN LICENSE BLOCK *****
2  * Version: MPL 1.1
3  * The contents of this file are subject to the Mozilla Public License Version
4  * 1.1 (the "License"); you may not use this file except in compliance with
5  * the License. You may obtain a copy of the License at
6  * http://www.mozilla.org/MPL/
7  *
8  * Software distributed under the License is distributed on an "AS IS" basis,
9  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
10  * for the specific language governing rights and limitations under the
11  * License.
12  *
13  * The Original Code is Riot.
14  *
15  * The Initial Developer of the Original Code is
16  * Neteye GmbH.
17  * Portions created by the Initial Developer are Copyright (C) 2006
18  * the Initial Developer. All Rights Reserved.
19  *
20  * Contributor(s):
21  * Felix Gnass [fgnass at neteye dot de]
22  *
23  * ***** END LICENSE BLOCK ***** */
24 package org.riotfamily.forms.fileupload;
25
26 import javax.servlet.http.HttpServletRequest JavaDoc;
27
28 import org.apache.commons.logging.Log;
29 import org.apache.commons.logging.LogFactory;
30 import org.springframework.web.multipart.MultipartException;
31 import org.springframework.web.multipart.MultipartHttpServletRequest;
32 import org.springframework.web.multipart.MultipartResolver;
33
34 /**
35  * MultipartResolver implementation to track the progress of file uploads.
36  * Acts as wrapper so that the actual work is performed by the implementation
37  * passed as constructor argument. Instead of the original request a
38  * {@link org.riotfamily.forms.fileupload.HttpUploadRequest HttpUploadRequest} is
39  * passed to the underlying resolver which provides the progress information.
40  */
41 public class FormsMultipartResolver implements MultipartResolver {
42
43     private static final String JavaDoc UPLOAD_ID_ATTR =
44             FormsMultipartResolver.class.getName() + ".uploadId";
45     
46     private Log log = LogFactory.getLog(FormsMultipartResolver.class);
47     
48     private MultipartResolver resolver;
49     
50     private String JavaDoc uploadIdParam = "uploadId";
51     
52     public FormsMultipartResolver(MultipartResolver resolver) {
53         this.resolver = resolver;
54     }
55     
56     public boolean isMultipart(HttpServletRequest JavaDoc request) {
57         return resolver.isMultipart(request);
58     }
59
60     public MultipartHttpServletRequest resolveMultipart(
61             HttpServletRequest JavaDoc request) throws MultipartException {
62         
63         String JavaDoc uploadId = request.getParameter(uploadIdParam);
64         if (uploadId == null) {
65             log.debug("Parameter '" + uploadIdParam + "' not set");
66             return resolver.resolveMultipart(request);
67         }
68         log.debug("Upload: " + uploadId);
69         HttpUploadRequest uploadRequest = new HttpUploadRequest(request);
70         request.setAttribute(UPLOAD_ID_ATTR, uploadId);
71         UploadStatus.add(uploadId, uploadRequest);
72         return resolver.resolveMultipart(uploadRequest);
73     }
74
75     public void cleanupMultipart(MultipartHttpServletRequest request) {
76         UploadStatus.clearStatus(request.getAttribute(UPLOAD_ID_ATTR));
77         resolver.cleanupMultipart(request);
78     }
79
80 }
81
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