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Ruby Programming
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Cookies

You can store all kinds of interesting stuff on an unsuspecting surfer's machine using cookies. You can create a named cookie object and store a number of values in it. To send it down to the browser, set a ``cookie'' header in the call to CGI#out.

require "cgi"
cookie = CGI::Cookie.new("rubyweb", "CustID=123", "Part=ABC");
cgi = CGI.new("html3")
cgi.out( "cookie" => [cookie] ){
  cgi.html{
    "\nHTML content here"
  }
}
produces:
Content-Type: text/html
Content-Length: 86
Set-Cookie: rubyweb=CustID%3D123&Part%3DABC; path=

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><HTML> HTML content here</HTML>

The next time the user comes back to this page, you can retrieve the cookie values for CustID and Part, as shown in the HTML output.

require "cgi"
cgi = CGI.new("html3")
cgi.out{
  cgi.html{
    cgi.pre{
      cookie = cgi.cookies["rubyweb"]
        "\nCookies are\n" + cookie.value.join("\n")
    }
  }
}
produces:
Content-Type: text/html
Content-Length: 111

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><HTML><PRE> Cookies are CustID=123 Part=ABC</PRE></HTML>
Ruby Programming
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