urandom_from_pid.yaws

<erl>

out(A) ->
    %% Create a random number
    {_A1, A2, A3} = now(),
    random:seed(erlang:phash(node(), 100000),
                erlang:phash(A2, A3),
                A3),
    Sz = random:uniform(100000),

    Pid = spawn(fun() ->
                        %% Read random junk
                        S="dd if=/dev/urandom count=1 bs=" ++
                            integer_to_list(Sz) ++ " 2>/dev/null",
                        P = open_port({spawn, S}, [binary,stream, eof]),
                        rec_loop(A#arg.clisock, P)
                end),

    [{header, {content_length, Sz}},
     {streamcontent_from_pid, "application/octet-stream", Pid}].


rec_loop(Sock, P) ->
    receive
        {discard, YawsPid} ->
            yaws_api:stream_process_end(Sock, YawsPid);
        {ok, YawsPid} ->
            rec_loop(Sock, YawsPid, P)
    end,
    port_close(P),
    exit(normal).

rec_loop(Sock, YawsPid, P) ->
    receive
        {P, {data, BinData}} ->
            yaws_api:stream_process_deliver(Sock, BinData),
            rec_loop(Sock, YawsPid, P);
        {P, eof} ->
            yaws_api:stream_process_end(Sock, YawsPid)
    end.

</erl>