[SOLVED] Zimlet read+write HttpSession

**mune72** · 03-12-2010, 04:23 AM

I wrote a zimlet to upload, convert a show a video file.

In the development machine it takes few second and it is ok, but in the production machine the process takes minutes, so some kind of feedback is necessary in order to tell the user the serve is still alive.

After a long, looong, thinking, I came out with this solution.

The form with the file to upload has an "onClick" traps that when the user submits the form to a jsp StoreinDB page, opens a jsp popup with a status that reload itself every 5 seconds.

The StoreinDB write in the
httpSession
the info for the popup.

If the jsp in the popup doesn't find any info in the session it displays "not available".

But I have an error in the popup, it looks like

Code:

[...]
<%@ page import="javax.servlet.http.*" %>
[...]
HttpSession session = request.getSession();

that, despite my import, "HttpSession" isn't recognized.

How can a zimlet access to a session?

Thanks

**sposetti** · 03-12-2010, 08:12 AM

Can you upload or paste your JSP code?

**mune72** · 03-13-2010, 04:22 AM

Originally Posted by sposetti

Can you upload or paste your JSP code?

Here they are

MVideoAdd.jsp (is simple form)

Code:

[...]
<BR>
    <form  id="addvideoform" method="post" action="DoAddVideo.jsp" ENCTYPE="multipart/form-data">
	<table border="0" width="400" id="table1">
[...]
        <tr>
            <td align="right">Video</td>
            <td align="left"><input type="file" name="datafile" size="45"></td>
        </tr>
		<tr>
            <td>

              <input name="Submit1" type="submit" value="Aggiungi" onClick="window.open('AddA.jsp', 'popupStatus', 'toolbar=0, location=0, status=0, menubar=0, scrollbars=1, resizable=1, width=320, height=240'); ValidaForm(this.form); return false;"/>
            </td>
		</tr>
	</table>
</form>

[...]
function ValidaForm(myform)  {
[...]

When the button "submit" is pressed a new window is opened and a status popup is opened with AddA.jsp

In AddA.jsp I read the session content every three seconds

Code:

<html>
  <head>
[...]
  </head>

<body>
<%@ page import="java.lang.*, java.sql.*, com.mysql.jdbc.Driver" %>
<%@ page import="java.io.*" %>
<%@ page import="java.util.*" %>
<%@ page import="javax.servlet.http.*" %>
<%@ page import="java.util.Iterator" %>
<%@ page import="org.apache.commons.fileupload.*"%>
<%@ page import="com.zimbra.cs.account.*, com.zimbra.cs.zimlet.*" %>
<%@ page import="java.util.Date, java.text.DateFormat, java.text.SimpleDateFormat" %>

<P align=center> add 1<BR>
<img  id="statusimg" src="img/caricamento.gif" alt="caricamento" border="0">
</P>
<%
[...]

  out.println("  setTimeout(\"window.location.reload()\", 3000);");  

  HttpSession session = request.getSession();
%>
</body>
</html>

**mune72** · 03-14-2010, 09:26 AM

I solved the problem! It was only that the variable "session" was already used, so I simply havn't (re)declared it.

Just to be safe I reinizializated it

Code:

session = request.getSession();

Then I found another little issue: variables coming from the session need to be casted

Code:

String videoName = (String) session.getAttribute(my_uid+"-videoName");

**sposetti** · 03-15-2010, 08:17 AM

Ths casting issue isn't really an issue. You can store any serializable object in a session attribute, not just Strings. So getAttribute() just returns Object that you have to cast. That's just the way to do it.

**mune72** · 03-15-2010, 10:03 AM

Originally Posted by sposetti

Ths casting issue isn't really an issue. You can store any serializable object in a session attribute, not just Strings. So getAttribute() just returns Object that you have to cast. That's just the way to do it.

Yes, it is not a real issue: it is just something I wasn't awared of, I lost on it a couple of hours, I hope nobody else has to throw away his time as I did.

Zimbra

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