An HTTP cookie is a piece of data stored by the user's web browser. Unless otherwise specified, cookies can be created, read, modified and deleted and modified both by JavaScript and from server-side scripts by reading the headers.

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28
votes
6answers
3k views

Standard ratio of cookies to “visitors”?

As noted in a recent blog post, We see a large discrepancy between Google Analytics "visitors" and Quantcast "visitors". Also, for reasons we have never figured out, Google Analytics just gets ...
17
votes
3answers
8k views

How do I set up a cookie-less domain?

I've read that it's best to serve static content (css, javascript, etc.) from a cookie-less domain or subdomain for better performance. I assume a domain is not cookie-less by default. How do I ...
13
votes
5answers
3k views

Google Analytics and the EU cookie directive. Who will fall foul of the law? Google or the developer?

So Google uses cookies when performing its usual duties of tracking users on a website. That is just it though; Google are setting the cookies and not your website as such. This is by virtue of the ...
10
votes
2answers
456 views

How many domains to split components across?

I understand how splitting components across domains can maximize parallel downloads, and enable you to have cookie-free static content domains, but since there's a time cost for each domain lookup ...
9
votes
5answers
2k views

Does the EU cookie law apply to an EU site that is hosted outside of the EU?

I have been reading up about this EU cookie law, and have also had in depth conversations with my girlfriend who is a solicitor/lawyer and with colleagues while building websites. While we are now ...
9
votes
1answer
274 views

Do many users turn off cookies?

Just how generally prevalent is it that users have cookies disabled in their browsers? I want to set a cookie during a user's session so that all the pages know that the presence of a particular ...
7
votes
2answers
3k views

How to use cookies in a secure manner to authenticate users?

In most cases I like using cookies to remember returning users to my websites. In my early/foolish days, I would store a UserID (auto-increment integer) in a cookie and if the user returned I would ...
6
votes
3answers
490 views

Why is the EU cookie directive causing so much excitement?

I am confused by all the excitement surrounding the EU cookie directive; why is it such a painful thing? As far as I can see cookies that are required for your site to function are allowed such as ...
6
votes
4answers
2k views

How can I tell Google Analytics to not use cookies for my sub domain?

I have my web site at example.com, and i have also setup a sub domain for serving static content at static.example.com. On my web pages I'm using Google Analytics, so it will attach its cookies to all ...
6
votes
1answer
91 views

What happens if I try to set a cookie on a bot?

I'm building my site to include some user-identifying cookies. When a visitor chimes in, I will set a cookie with a unique visitor id (a guid) and the date-time of the visit, and save a visit record ...
6
votes
3answers
853 views

Multiple google analytics instances on a page?

My company creates (and hosts) sites for many different clients. We allow clients to send us tracking code, including Google Analytics, and we put them on the page. We would also like to include our ...
6
votes
1answer
122 views

Does the SPDY protocol eliminate the need for cookieless domains?

With plain HTTP, cookieless domains are an optimization to avoid unnecessarily sending cookie headers for page resources. However, the SPDY protocol compresses HTTP headers and in some cases ...
5
votes
1answer
563 views

Forced GZIP Detection on Google App Engine

Some clients are appearing on our Google App Engine instances without the Accept-Encoding header. We normally use the set a cookie with an appended iframe technique (or variation thereof) to detect ...
4
votes
2answers
542 views

Google Analytics setting cookies on static content despite being on entirely separate domain

I recently decided to comply with the YSlow recommendation that static content is hosted on a cookieless domain. As I already use the root of my domain (donaldjenkins.com) to host my website—on which ...
4
votes
1answer
394 views

Age verification in website questions

I am working on a website for a client that is requesting a way to verify your age. I have debated on creating a cookie that stores your age but I am unsure on a few things. How does SEO play into ...
3
votes
1answer
661 views

SEO for images: can I use a different (cookieless) domain?

We want to increase the value of some of our important images by means of SEO, and we want to start serving them from a different, i.e. cookieless, domain. We want to go from ...
3
votes
1answer
468 views

Using .htaccess to set a cookie and 301 redirect

I currently have in my .htaccess: RewriteRule ^$ http://chfmaine.com/ [CO=moved:yes:chfmaine.com:1/,R=301,NE,NC,L] I was basing this off of this post. That's a lot more than I need but the setting ...
3
votes
2answers
293 views

Remember me or not?

I was told to post this on webmasters instead of stackoverflow. Is it safe to have the remember me feature? Would it be somewhat safe (knowing it won't be 100% safe) to allow users to close their ...
3
votes
1answer
1k views

What is the BCSI-CS-**** cookie for?

I'm undertaking an audit of the cookies we use on our external sites. There's one cookie that's used by all the sites, and by different domains within the sites. It starts BCSI-CS- and has random ...
3
votes
1answer
129 views

How to offer a cookie opt in/out to users? [duplicate]

Possible Duplicate: Google Analytics and the EU cookie directive. Who will fall foul of the law? Google or the developer? I intend to use google analyticts, and as I understand it I will ...
3
votes
5answers
293 views

Variable IPs: How variable are they? Best practices for tracking

There are a lot of questions on StackOverflow relating to session security / session hijacking, but there doesn't seem to be a really good solution to the problem. The three most common suggestions ...
3
votes
1answer
252 views

Google Analytics cookie across SagePay checkout

We use SagePay's Server integration for our online payments. We use Google Analytics to track activity on our website and Google Ecommerce tracking to log transactions. In Google Analytics, under the ...
2
votes
4answers
414 views

Can someone explain how FaceBook's cookie tracks you while logged out?

This article claims that Facebook tracks what you do, even when you're logged off of Facebook, via cookies. Now, a cookie is just a text file... that is read/written to while you're actually on that ...
2
votes
3answers
756 views

SEO - Redirect on first page (site.com -> site.com/en)

I have website with multiple languages and at first entrance it checks for cookie and if no cookie is present then it defaults to English language and redirects to site.com/en. So basically every ...
2
votes
1answer
1k views

Do iframes have access to the cookies of the hosting domain?

We want to build an ad-frame which will run on external sites (e.g. YYY.com). The external site will place an iframe to our site (ZZZ.com/ourAdContent.html) and we will show some ads in this frame. ...
2
votes
2answers
61 views

How does this stackexchange form saved the work, I mean keep an auto save function, to retrieve loss of work

How does this stackexchange form saved the work, I mean keep an auto save function, to retrieve loss of work, in case the user's browser crashes.
2
votes
1answer
85 views

Redirecting to a default (or last visited) subdirectory. Does Google like this?

i have a site that has 3 web applications, lets use this example: example.com/nicy example.com/mash example.com/zoken The main application is nicy, so if the user comes for the first time (or if ...
2
votes
1answer
191 views

Does adding LinkedIn button to a website result in cookies that track users?

We are planning to add the LinkedIn button in our website. But the restriction we are having is, the website should not use the cookies which collect the personal information. No impersonation. But I ...
2
votes
2answers
94 views

Setting cookies only on the naked domain

As far as I know, one can set a cookie for example.com and not .example.com and then the cookie will only be visible on example.com and not sub.example.com. Is this true? I have set a cookie on a test ...
2
votes
2answers
214 views

Cookie manager PHP

I own a Joomla commerce store and although I use Google Analytics in order to track visitors, I need to install a cookie manager in order to be able to track cookies that were installed on customer ...
2
votes
2answers
108 views

Google AdSense reloading?

Please tell me something about Google AdSense: 1) Can i reload ads by myself without full-page-reloading? For example refresh AdSense frame or call some script? 2) About "interest-based advertising" ...
2
votes
2answers
102 views

Can a website require search engine robots to support cookies?

Sometimes I pretend to be a search engine robot to get access to "subscriber only" web pages, or just to get a plain and simple view of a page that isn't cluttered with moving animations and other ...
2
votes
2answers
111 views

How to display Cookie Notification text to users that is ignored by Search Engines?

Websites within the EU are meant to inform users about the use of cookies on their website. Whilst the law raises plenty of implementation questions already, the general consensus is that we must at ...
2
votes
1answer
3k views

mod_rewrite to edit cookies conditionally

Is it possible to use mod_rewrite to modify values in cookies based upon a condition? I am completely new to HTTP, but I have tried a thing or two. The only regex I know is Perl-style, I hope it is ...
2
votes
3answers
2k views

Session cookie being dropped when moving under the SSL

The short version: I've got a session cookie being set on a dev site but it's not being picked up when I move to the SSL (so the shopping cart empties when you go to the checkout). When it's set on ...
2
votes
1answer
3k views

What does the Quantcast __qca cookie do?

I'm reviewing the cookies served up from my website and one of them is a first-party cookie __qca which seems to be set by Quantcast. I'm sure this is just used for tracking, but I can't find this ...
2
votes
2answers
141 views

Cookie Audit help needed [closed]

Can anyone recommend any decent cookie audit plugins for firefox or chrome I can see the typical google cookies on the site but I am struggling to find out what a couple of the other cookies actually ...
1
vote
1answer
122 views

Cookie data transfer

The context is a third-party analytics service, specifically Quantcast, but the inquiries are more general in nature. Please forgive and correct me if any of my assumptions are off, and thank you in ...
1
vote
1answer
737 views

Enforcing a specific order for cookie headers

We have an application that cares about the order of cookie headers. It shouldn't, since this isn't mandated by the standards and indeed we're getting the headers in various different orders So we ...
1
vote
1answer
52 views

Returning visitor stats reliably over longer periods of time in Google Analytics

I'm looking into how useful returning visitors stats in Google Analytics are over longer periods of time, such as two or three years. It seems that the __utma cookie is set to expire 2 years from ...
1
vote
3answers
264 views

What are the problems of httponly and secure cookies?

We would like to set: all our cookies (session id, etc.) as "httponly" all security (session token, "remember me", etc.) cookies as "secure" Except compatiblity issues, what are the know problems ...
1
vote
1answer
65 views

How can you set cookieless subdomain with Quantcast

I have correctly setup Google Analtycis so GA is not setting cookies for my subdomain. I mean for my static subdomain. But Quantcast is setting. What i wonder is can i prevent Quantcast to set cookie ...
1
vote
1answer
69 views

Empty Cookie based on IP address

Is there a way to empty a previous cookie based on source ip? I need this to be done because of loadbalancing issues. regards Geert
1
vote
1answer
115 views

Making one exclude cookie for multiple google analytics sites

I've got multiple sites all with different google analytics profiles in them (managed under one account). I would like to exclude everyones traffic in the office from all the sites. To do this when ...
1
vote
2answers
333 views

Temporary redirect needs to detect the URL of original page request from a search engine then redirect again to that page

I've tried searching this an innumerable amount of times with different word combinations, can't seem to crack it. Apparently I do not know the right terms in this situation. When you come to my ...
1
vote
2answers
245 views

Can search engines change language and read the cookie?

I am building a multi language website in PHP and prepared all my strings in English by default using gettext() My locale/it_IT/LC_MESSAGES/default.mo file is working correctly and now I need to sort ...
1
vote
3answers
187 views

cookie not being sent when requesting JS

I host a webservice, and provide my members with a Javascript bookmarklet, which loads a JS sript from my server. However, clients must be logged in, in order to receive the JS script. This works for ...
1
vote
1answer
58 views

Can AdSense crawler view pages that require cookies?

Details I require users to agree to terms and conditions before they can view several pages on my site. Once they have agreed a cookie is set and they can proceed to the webpage. If a user somehow ...
1
vote
1answer
36 views

Cookie being assigned on website

I am updating our privacy policy and was checking what cookies were being assigned to visitors from our website. I found one that I am unaware of. It is a Drupal 6 site and there is no module being ...
1
vote
1answer
89 views

How to handle pages that requires the use of session cookie?

I have a search page that uses session to track search criteria made by the user. A session cookie is created automatically when the page is launched. As bots do not use cookie, 1000s of sessions ...