1027695 - Setting a cookie in body of document isn't available for reading in loaded js

Status: RESOLVED INVALID

(Core :: Networking: Cookies, defect, P3)

Description

[robert.wlaschin]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0 (Beta/Release)
Build ID: 20140610163407

Steps to reproduce:

Create a cookie in body of html

e.g.
function setCookie(c_name,value,exdays)
{
   var exdate=new Date();
   exdate.setDate(exdate.getDate() + exdays);
   var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
   document.cookie=c_name + "=" + c_value;
}
//enable local debugging
setCookie('localOn',1,1);

Load a new js script 
e.g.
document.write(unescape("%3Cscript src='/ams/js/tag_os.js' type='text/javascript'%3E%3C/script%3E"));

Try to read the cookie from within the loaded js script
e.g.
function readCookie(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
            var c = ca[i];
            while(c.charAt(0) == ' ') {
                c = c.substring(1, c.length);
            }
            if(c.indexOf(nameEQ) == 0) {
                return c.substring(nameEQ.length, c.length);
            }
        }
        return null;
    };

readCookie('localOn');


Actual results:

The cookie was not found

Notes -- when stepping through with debugger problem vanished.


Expected results:

The cookie should have been found with the value of 1

Comment 1

[Firefox Bug Husbandry Bot]

Bulk change to priority: https://bugzilla.mozilla.org/show_bug.cgi?id=1399258

Comment 2

[Firefox Bug Husbandry Bot]

Bulk change to priority: https://bugzilla.mozilla.org/show_bug.cgi?id=1399258

Comment 3

[Andrea Marchesini [:baku]]

This bug looks invalid. We have plenty of similar JS tests about cookies to test this cookie behavior.