Short answer, you can't. People can turn off cookies in every major browser now.

If you must do cookies that way, maybe you can mark the ones that are returned and purge the ones that never get used after a short period?

Alternately, you can do a two stage cookie drop where you send them a "cookie request" cookie and then only make a long term cookie if they have that cookie. But then you have to work out a strategy for url "marking" the people who wouldn't accept the cookie and ignoring them.

--
$you = new YOU;
honk() if $you->love(perl)


In reply to Re: Checking Cookies Support with Perl by extremely
in thread Checking Cookies Support with Perl by phooghoudt

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.