readcookie.html

<html>

<h2> Read cookie </h2>

<p> Yes, I read your cookie You have vistited this page 2 times they were 
<ol> 
<li> {{2024,4,3},{1,4,24}}
<li> {{2024,4,3},{1,4,24}}
 </ol>
 Reloading this page will show the session state 


<p>
The code to read the cookie, is simple, we get the cookie passed to the yaws
code in the #arg structure which is the argument supplied to the out/1 function.

<p>We use the <tt>yaws_api:find_cookie_val/2</tt> function to parse
the raw cookie string passed to us from the browser.

The code is:
<br><br>
<div class="box"> <pre>
&lt;html&gt;

&lt;h2&gt; Read cookie &lt;/h2&gt;

&lt;erl&gt;
out(A) -&gt;
    H=A#arg.headers,
    C = H#headers.cookie,

    L=case yaws_api:find_cookie_val(&quot;foobar&quot;, C) of
          [] -&gt;
              f(&quot;&lt;p&gt; No cookie set from the browser, need to &quot;
                &quot;visit &lt;a href=\&quot;setcookie.yaws\&quot;&gt;setcookie.yaws&lt;/a&gt; &quot;
                &quot;to set the cookie first ~n&quot;, []);
          PidStr -&gt;
              Pid = list_to_pid(PidStr),
              Pid ! {self(), tick},
              receive
                  {Pid, VisitList} -&gt;
                    f(&quot;&lt;p&gt; Yes, I read your cookie &quot;
                      &quot;You have vistited this page ~w times &quot;
                      &quot;they were ~n&lt;ol&gt; ~n~s &lt;/ol&gt;~n &quot;

                      &quot;Reloading this page will show the session state &quot;,

                      [length(VisitList),
                       lists:map(fun(D) -&gt;
                                         f(&quot;&lt;li&gt; ~p~n&quot;, [D])  end,
                                 VisitList)
                      ])
              after 500 -&gt;
                      f(&quot;&lt;p&gt; You had a cookie, but the pid handling your sess &quot;
                        &quot;timedout ...&quot;,[])
              end
      end,
    {html, L}.

&lt;/erl&gt;


&lt;p&gt;
The code to read the cookie, is simple, we get the cookie passed to the yaws
code in the #arg structure which is the argument supplied to the out/1 function.

&lt;p&gt;We use the &lt;tt&gt;yaws_api:find_cookie_val/2&lt;/tt&gt; function to parse
the raw cookie string passed to us from the browser.

The code is:
&lt;erl&gt;
out(A) -&gt;
    yaws_api:pre_ssi_files(A#arg.docroot, [&quot;readcookie.yaws&quot;]).
&lt;/erl&gt;


&lt;/html&gt;


</pre></div>
<br>


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