File Download in JSP, Please help

I am wondering if somebody can help me with a problem :
I am trying to register a fact that somebody has downloaded a file
from my company's website.
When a user clicks on the link I provided, a message box came up to prompt user with the location to save the file. How can I register the fact that user press "Cancel" instead of OK. In other words I need to be able to tell whether the guy really downloaded it or not.
Thanks

So, how to determine if user had pressed 'Cancel' or just the connection is broken?
The pure JSP cannot do it.
I think you should have some binary code like applet or active-x to check it.

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Filename on file download from jsp

This may help:
          ----- Original Message -----
          From: "Erik Lindquist" <[email protected]>
          Newsgroups: weblogic.developer.interest.jsp
          Sent: Wednesday, June 28, 2000 6:20 PM
          Subject: How to dynamically display images in JSPs
          > This took a little while to figure out so I thought I'd share. After
          > doing some research I was led to the following approach on how to load
          > images from an Oracle database into a JSP:
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          > The "main" JSP:
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          > <title>Image Test</title>
          > </head>
          > <body>
          > <center>
          > hello
          > <P>
          > <img border=0 src="getImage.jsp?filename=2cents.GIF">
          > <P>
          > <img border=0 src="getImage.jsp?filename=dollar.gif">
          > <P>
          > world
          > </body>
          > </HTML>
          >
          >
          > And this is the image getter:
          >
          > <% try {
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          > String filename = (String) request.getParameter("filename");
          > java.sql.Connection conn =
          > java.sql.DriverManager.getConnection("jdbc:weblogic:pool:orapool"); //
          > connect to db
          > java.sql.Statement stmt = conn.createStatement();
          > String sql = "select image from testimage where filename = '" +
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          > java.sql.ResultSet rs = stmt.executeQuery(sql);
          > if (rs.next()) {
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          > java.io.OutputStream os = response.getOutputStream();
          > os.write(image);
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          > %>
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          > don't know much about how browsers work but I think that once it sees
          > flat ascii come at it it treats everything that follows as text/plain
          > which is incorrect for the binary stream that's being sent. Another
          > work around was to set out = null; but that's kind of ugly and might
          > produce server errors. The real fix is to write a bean to handle images
          > which I'll work on next (does anybody have any hints on how to do
          > that?)
          Cameron Purdy
          [email protected]
          http://www.tangosol.com
          WebLogic Consulting Available
          "Ramesh" <[email protected]> wrote in message
          news:[email protected]...
          >
          > Hi,
          >
          > Even I could download the files with this technique, I couldn't open the
          file downloaded. It seems the file is getting currepted during tranfer.. Can
          u help me in this regard please?
          >
          > Thank u
          > Ramesh
          >
          > [email protected] (Anders B. Jensen) wrote:
          > >In an Web-application written in Java Server Pages it should be possible
          > >for the user to download data from the web-server. The data will never
          > >exist as a file on the web-server, only in the PrintWriter object, out.
          > >To force the Internet Explorer (IE) to show the download dialog window
          > >the Contenttype of the HTTP-header have been set to "html/transfer". The
          > >question is:
          > >
          > >Is it possible to set the filename appearing in the download dialog
          > >appearing on the client?
          > >
          > >
          > >Below is a listing of the source-code:
          > >
          > ><%@ page extends="com.beasys.portal.admin.PortalJspBase"%>
          > ><jsp:useBean id="download" scope="session" class="dk.lec.DownloadData" />
          > >
          > ><%
          > > String tmpstr;
          > > response.setContentType("html/transfer");
          > > out.clear();
          > > tmpstr=download.getStrbuffer().toString();
          > > out.println(tmpstr.trim());
          > >%>
          > >
          > >
          > >Anders B. Jensen
          > >Consultant, Research & Development
          > >LEC AS
          > >
          > >Remove the SPAMLESS to mail me.
          >

File Download in JSP, Please help

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