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I am trying to learn about cookies and what all they store. Since I am an active user of Google Chrome, I was thinking of accessing the session Id of a webpage from the cookie using only Javascript. I have obtained the list of all cookies stored in the browser using chrome.cookies.getAll().
However I can't understand how to access the session Id from the cookies since there is no keyword for it ?
How can I obtain the session ID from the cookies?
The code from obtaining the cookies is below :
<html><head>
<script>
chrome.browserAction.onClicked.addListener(getCookies);
var cacheMap = {};
var cookie_nameArr = [];
var cookie_valArr = [];
function getCookies(){
chrome.cookies.getAll({}, function(cookies){
for(var b in cookies){
var cookieVal = cookies[b].value;
var cookieName = cookies[b].domain;
cookie_nameArr.push(cookieName);
cookie_valArr.push(cookieVal);
if(!cacheMap[cookieName])
{
cacheMap[cookieName] = 1;
}
else
cacheMap[cookieName]++;
}//alert(cookie_nameArr.length + "," + cookie_valArr.length);
for(var i=0;i<3;i++)
{
alert(cookie_nameArr[i] + ", " + cookie_valArr[i]);
}
});
}
</script></head>
</body></html>
I am trying to learn about cookies and what all they store. Since I am an active user of Google Chrome, I was thinking of accessing the session Id of a webpage from the cookie using only Javascript. I have obtained the list of all cookies stored in the browser using chrome.cookies.getAll().
However I can't understand how to access the session Id from the cookies since there is no keyword for it ?
How can I obtain the session ID from the cookies?
The code from obtaining the cookies is below :
<html><head>
<script>
chrome.browserAction.onClicked.addListener(getCookies);
var cacheMap = {};
var cookie_nameArr = [];
var cookie_valArr = [];
function getCookies(){
chrome.cookies.getAll({}, function(cookies){
for(var b in cookies){
var cookieVal = cookies[b].value;
var cookieName = cookies[b].domain;
cookie_nameArr.push(cookieName);
cookie_valArr.push(cookieVal);
if(!cacheMap[cookieName])
{
cacheMap[cookieName] = 1;
}
else
cacheMap[cookieName]++;
}//alert(cookie_nameArr.length + "," + cookie_valArr.length);
for(var i=0;i<3;i++)
{
alert(cookie_nameArr[i] + ", " + cookie_valArr[i]);
}
});
}
</script></head>
</body></html>
1 Answer
Reset to default 2First you need to figure out what you are looking for. It's hard to look for a black cat in a dark room, especially if it is not there.
Open Chrome dev tools on the page you are interested in and check Resources tab. Do you see your cookie under "Cookies"? If yes, then you will be able to read it with your method. If not, then check your page url - maybe it is passed as url parameter? If not, then maybe session is used only for ajax requests? Maybe it is not used at all?
You need to find it manually first, then do it programmatically. Sessions e in all shapes and sizes, each site has its own way of implementing it. You can't build an extension that reads session for all sites.
Your approach is pretty much the way to go, just there is an easy way of inspecting objects using console instead of alert:
chrome.cookies.getAll({domain: "stackoverflow."}, function(cookies){
console.log(cookies);
});
Click on background.html link on your extensions tab and check the console.
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