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setpcookie.yaws
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setpcookie.yaws
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<erl>
-export([pserv/0]).
ensure_pcookie_server() ->
case whereis(pcookie_server) of
undefined ->
proc_lib:start(?MODULE, pserv,[]);
_ ->
ok
end.
pserv() ->
catch begin
register(pcookie_server, self()),
T = ets:new(pcookies, [set, public,
named_table]),
ets:insert(T, {counter, 0})
end,
proc_lib:init_ack(ok),
pserv_loop().
pserv_loop() ->
receive
X ->
pserv_loop()
end.
setcookie(A) ->
Num = ets:update_counter(pcookies, counter, 1),
Data = {(A#arg.headers)#headers.user_agent,
calendar:local_time(),
inet:peername(A#arg.clisock)},
ets:insert(pcookies, {{cookie, Num}, Data}),
yaws_api:setcookie("pfoobar",integer_to_list(Num), "/").
out(A) ->
ensure_pcookie_server(),
H = A#arg.headers,
C = H#headers.cookie,
case C of
[Cookie|_] ->
case string:tokens(Cookie, [$=]) of
["pfoobar", NumStr] ->
Num = list_to_integer(NumStr),
%% cookie allready set
case ets:lookup(pcookies, {c, Num}) of
[{cookie, Data}] ->
ok; %% cookie already set
[] ->
setcookie(A)
end;
_ ->
setcookie(A)
end;
_ ->
setcookie(A)
end.
</erl>
<erl>
out(A) -> {ssi, "TAB.inc", [],[]}.
</erl>
<div id="entry">
<h2> Set persistent cookie </h2>
<p>This is the page that set a persistent cookie in
the browser.
<a href="readpcookie.yaws">readpcookie.yaws</a> will
read the cookie and report persistent information.
</div>
<erl>
out(A) -> {ssi, "END2",[],[]}.
</erl>