hi for downloading you can do this
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", "attachment; filename=\"" +
filename + "\"");
where filename is say filename="xyz.xml".
Regards,
Vikramjit Singh,
Systems Engineer,
GTL Ltd.
Ph. 7612929-1031
-----Original Message-----
From: Daniel J. D'Cotta [mailto:[EMAIL PROTECTED]]
Sent: Sunday, June 23, 2002 7:38 PM
To: [EMAIL PROTECTED]
Subject: Re: File Upload/Download Issues
File Download:
~~~~~~~~~~~~~~
>response.setHeader("content-type","application/vnd.ms-excel")
I have 2 questions:
1) I am trying to figure which MIME type can be used for all file types
(.xml, .html, .dat, etc). Is there any?
2) Also is there a way to force downloading of all file types, instead of
letting the web browser open them.
PS: Joe, thanks for the information, I really appreciate the help.
Regards,
Daniel
-----Original Message-----
From: Joe Germuska [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, June 19, 2002 9:56 PM
To: Daniel J. D'Cotta
Subject: RE: File Upload/Download Issues
At 10:48 AM +0800 2002/06/19, Daniel J. D'Cotta wrote:
>Joe,
>
>Thanks... but I have a question. (Posting to you direct because it is not
>Struts related)
>
>>>3. Finally, How do you let users download a file with Struts? The file
>>>cannot be outside WEB-INF.
>>
>>You'd need to write directly to the HttpServletResponse object and
>>return a null ActionMapping from the perform/execute method of your
>>Action. You're responsible for setting all the headers (content
>>type, etc). But this isn't hard to do -- it's just not something
>>that Struts helps you do.
>
>How would I do this?
well, ServletResponse (the superclass of HttpServletResponse) has two
methods, "getOutputStream()" and "getWriter()", each of which return
classes to which you can write data (getOutputStream returns a
ServletOutputStream, and getWriter returns a java.io.PrintWriter).
So, once your action decided that everything was OK, first, it would
do some setup on the response object --
* set a status code: if everything is OK, you'd call
"response.setStatus(HttpServletResponse.SC_OK)" The full list of
status codes is in the api doc for HttpServletResponse.
* set a MIME type -- for example, for an Excel spreadsheet:
'setHeader("content-type","application/vnd.ms-excel");' The official
list of registered MIME types is at
<http://www.isi.edu/in-notes/iana/assignments/media-types/media-types>,
although it may be easier to just look at your own web browsers
"helper applications" settings.
* get a handle on your content -- if it's in "WEB-INF", the
easiest way is to use
ServletContext.getResourceAsStream("/WEB-INF/path/to/file"), although
I believe WebLogic 6 has problems with this (I know Weblogic 6 can't
load JSPs from WEB-INF, but not sure about regular files)
* copy from your content InputStream to the
ServletOutputStream (or wrap them in reader/writer classes, etc --
standard java.io stuff here).
* close the streams and you should be done.
It's been a while since I've spit content directly out at the
response -- obviously it's something you only want to do when you
need to. There may be other HTTP headers that you need to set, at
least in some cases, etc. I like the O'Reilly "Webmaster in a
Nutshell" for a quick reference to HTTP headers and the details of
that protocol, although I'm sure you can find comparable material
online.
Hope that helps.
Joe
--
--
* Joe Germuska { [EMAIL PROTECTED] }
"It's pitiful, sometimes, if they've got it bad. Their eyes get
glazed, they go white, their hands tremble.... As I watch them I
often feel that a dope peddler is a gentleman compared with the man
who sells records."
--Sam Goody, 1956
tune in posse radio: <http://www.live365.com/stations/289268>
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