Date: 2004-11-26T01:05:50
Editor: NiallPemberton <[EMAIL PROTECTED]>
Wiki: Apache Struts Wiki
Page: StrutsFileDownload
URL: http://wiki.apache.org/struts/StrutsFileDownload
no comment
Change Log:
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@@ -10,6 +10,7 @@
* ResourceStreamInfo Example
* Bye Array Example
* Using the DownloadAction in you Web Pages
+ * Content Disposition
(niallp: Since I haven't actually used this class myself, I'm hoping that
Martin, Frank or anyone else involved in the discussion/creation of this would
take a look here to see if its OK)
@@ -192,3 +193,56 @@
}}}
+== Content Disposition ==
+
+=== Setting the Content Disposition ===
+DownloadAction doesn't cater for setting the content dispositon header. I
guess at the moment the best way to do that would be override the execute()
method and set it first, something like this...
+
+{{{
+
+public class ExampleFileDownload extends DownloadAction{
+
+
+
+ protected StreamInfo getStreamInfo(ActionMapping mapping,
+ ActionForm form,
+ HttpServletRequest request,
+ HttpServletResponse response)
+ throws Exception {
+
+ // Download a "pdf" file - gets the file name from the
+ // Action Mapping's parameter
+ String contentType = "application/pdf";
+ File file = new File(mapping.getParameter());
+
+ return new FileStreamInfo(contentType, file);
+
+ }
+
+ public ActionForward execute(ActionMapping mapping,
+ ActionForm form,
+ HttpServletRequest request,
+ HttpServletResponse response)
+ throws Exception {
+
+ response.setHeader("Content-disposition",
+ "attachment; filename=" + mapping.getParameter());
+
+ return super.execute(mapping, form, request, response);
+
+ }
+}
+
+}}}
+
+Probably would want to play with the file name, to remove any path info first.
+
+=== Content Disposition Values ===
+
+You can set the content disposition to either download the file or open up in
the browser:
+ * To open up in the browser: "inline; filename=myFile.pdf"
+ * To download: "attachment; filename=myFile.pdf"
+
+Displaying images I always set the content disposition to the "inline" option.
+
+'''NOTE:''' I'm not expert at this, just got it working by trial and error. I
had problems and I'm seem to remember I had to play with setting the response
headers to get it to work properly. There may also be browser issues - my app
only has to work with IE. Anyone who knows more about this, feel free to amend
this page.
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