Cookies are small pieces of information that your web browser stores on your
computer, as requested by websites. Most websites request such cookies to be
stored nowadays, but most of the time these are merely used for navigational
purposes so that the website can present you with webpages that are tweaked
depending on where else you have been on the site. Most modern browsers give you
the ability to block and reject cookies on a per-site basis, but very few give
you any warning about the properties of the cookie (how long your browser will
store the cookie, and which other websites can see the cookie, for instance).
Their biggest commercial use is for advertisers to track conversions through a
The layout of Netscape's cookies.txt file is such that
each line contains one name-value pair. An example cookies.txt file may have an
entry that looks like this:
.netscape.com TRUE / FALSE 946684799
Each line represents a single piece of stored
information. A tab is inserted between each of the fields. From left-to-right,
here is what each field represents:
- domain - The domain that created AND that can read the variable.
- flag - A TRUE/FALSE value indicating if all machines within a given domain
can access the variable. This value is set automatically by the browser,
depending on the value you set for domain.
- path - The path within the domain that the variable is valid for.
- secure - A TRUE/FALSE value indicating if a secure connection with the
domain is needed to access the variable.
- expiration - The UNIX time that the variable will expire on. UNIX time is
defined as the number of seconds since Jan 1, 1970 00:00:00 GMT.
- name - The name of the variable.
- value - The value of the variable.
- Variable name = myCookieA * Variable value = popup_ad
- Host name = www.theonion.com
- Path = /onion3806 (note that in this format, the host name and the path are
- Flag = 1088 (I'm not sure what this is all about; I've also observed 1024 as
a value here; I think it's a True/False flag to indicate whether or not the
cookie is secure)
- Date and Time of Cookie Expiration = 3596769152, 29473513
- Date and Time of Cookie Creation = 2888195648, 29473312
These cookies are set by programming languages such as Perl and PHP.
MyCookieA=popup_ad; path="/"; domain=www.theonion.com; path_spec; discard;
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