Amazon does both cookies and session ids in the path (and every URI on the page). As long as you are expiring these at the end of a "visit" and mixing in things like IP and user agent on the server side, this can work fine. Plus, with their model, they require a secure sign-in every time you perform account altering actions ("no" for putting something in the cart, "yes" for paying for something or changing an address).

If you do both, you can basically ignore whether or not the client supports cookies. Then again, cookies are so basic to web functionality today that I don't think the dual model is really justified compared to the extra overhead (URI rewriting) and complexity it adds.

In reply to Re^2: Another question about session-id by Your Mother
in thread Another question about session-id by lihao

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.