1 package org
.argeo
.eclipse
.ui
.specific
;
5 import org
.apache
.commons
.logging
.Log
;
6 import org
.apache
.commons
.logging
.LogFactory
;
7 import org
.eclipse
.rwt
.RWT
;
8 import org
.eclipse
.rwt
.service
.IServiceHandler
;
9 import org
.eclipse
.rwt
.service
.IServiceManager
;
10 import org
.eclipse
.ui
.PlatformUI
;
13 * RAP SPECIFIC handler to enable the opening of a download dialog box triggered
14 * by whatever action in the UI
16 * Manages the registration of the effective DownloadServiceHandler at
19 * Manages the process of forwarding the request to the handler at runtime to
23 public class FileHandler
{
24 public final static String FORCED_DOWNLOAD_URL_BASE_PROPERTY
= "argeo.rap.specific.forcedDownloadUrlBase";
26 private final static Log log
= LogFactory
.getLog(FileHandler
.class);
28 public FileHandler(FileProvider provider
) {
29 // Instantiate and register the DownloadServicHandler.
30 IServiceManager manager
= RWT
.getServiceManager();
31 IServiceHandler handler
= new DownloadServiceHandler(provider
);
32 manager
.registerServiceHandler("downloadServiceHandler", handler
);
35 public void openFile(String fileName
, String fileId
) {
38 // http://wiki.eclipse.org/RAP/FAQ#How_to_provide_download_link.3F
39 // And forum discussion :
40 // http://www.eclipse.org/forums/index.php?t=msg&th=205487&start=0&S=43d85dacc88b505402420592109c7240
43 if (log
.isTraceEnabled())
44 log
.trace("URL : " + createFullDownloadUrl(fileName
, fileId
));
46 URL url
= new URL(createFullDownloadUrl(fileName
, fileId
));
47 PlatformUI
.getWorkbench().getBrowserSupport()
48 .createBrowser("DownloadDialog").openURL(url
);
49 } catch (Exception e
) {
53 // These lines are useless in the current use case but might be
54 // necessary with new browsers. Stored here for memo
55 // response.setContentType("application/force-download");
56 // response.setHeader("Content-Disposition", contentDisposition);
57 // response.setHeader("Content-Transfer-Encoding", "binary");
58 // response.setHeader("Pragma", "no-cache");
59 // response.setHeader("Cache-Control", "no-cache, must-revalidate");
62 private String
createFullDownloadUrl(String fileName
, String fileId
) {
63 StringBuilder url
= new StringBuilder();
64 // in case RAP is proxied we need to specify the actual base URL
65 // TODO find a cleaner way
66 String forcedDownloadUrlBase
= System
67 .getProperty(FORCED_DOWNLOAD_URL_BASE_PROPERTY
);
68 if (forcedDownloadUrlBase
!= null)
69 url
.append(forcedDownloadUrlBase
);
71 url
.append(RWT
.getRequest().getRequestURL());
72 url
.append(createParamUrl(fileName
, fileId
));
73 return url
.toString();
76 private String
createParamUrl(String filename
, String fileId
) {
77 StringBuilder url
= new StringBuilder();
79 url
.append(IServiceHandler
.REQUEST_PARAM
);
80 url
.append("=downloadServiceHandler");
81 url
.append("&filename=");
83 url
.append("&fileid=");
85 String encodedURL
= RWT
.getResponse().encodeURL(url
.toString());