455854 - eval, in javacript, when executed, causes a GET/POST request to the page being currently viewed

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[sinuousmail-bugzilla]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1

suppose the page is start.php which contains a script-X

"var dummy = eval ('some text')"

and suppose the page is called as follows

"GET /start.php"

The problem is that after the first "GET /start.php" request, as soon as the script-X is executed for the FIRST time, the browser resends the request "GET /start.php", even though the page is not reloaded or refreshed. NOTE that the contents of the page aren't refreshed , the browser only sends a request.
( Live HTTP headers was used to see these requests )
Also, even if the script-X is changed with another script-Y

"var dummy = eval('()');"

the behavior remains the same.

Reproducible: Always

Steps to Reproduce:
1.Create any page "start.php" with a script having eval function like 
<script type="text/javascript">
   var dummy = eval ('');
</script>

2. Open the page in the browser. Simultaneously, monitor the http requests being sent by the browser.

3.It'll be observed that "GET /start.php" is sent twice, even though the page is loaded only once. The first execution of any eval statement causes the page request to be sent again

Actual Results:  
It'll be observed that "GET /start.php" is sent twice, even though the page is loaded only once. The first execution of any eval statement causes the page request to be sent again

Expected Results:  
"GET /start.php"
should be sent only once.

I was using the default theme.

Comment 1

[sinuousmail-bugzilla]

Attachment: The test case for the reported problem

Try running the attached file from a server ( I used Apach 2.2.8 ) and also take a look at the browser requests simultaneously. It would be observed that after the first alert ( which is before the execution of the eval statement ), there is only one http-request, and after the second alert, there are two http-requests to the server.

Comment 2

[Matthias Versen [:Matti]]

Do you get the additional request if you run Firefox in the Firefox safemode (without addons) ?
http://kb.mozillazine.org/Safe_Mode

Comment 3

[sinuousmail-bugzilla]

Thanks for the reply.
I just checked it up in safemode and there was no additional request. I'll now try to find the exact addon that causes the request to be sent again.
I apologize for bringing up a non-issue.
Thanks again !

Comment 4

[Matthias Versen [:Matti]]

I would guess either firebug or livehttpheaders.
They have to request a page again for some cases to get the headers.
This will be better in the future because recently a new API to get th headers got implemented in Gecko.