Thanks for those tips! I have modified the code accordingly and modified the OP. Unfortunately, the behavior of my code is the same (while your code snippet works correctly).

In reply to Re^2: PSGI, Plack, Twiggy, AnyEvent and SockJS... I need help by xtpu2
in thread PSGI, Plack, Twiggy, AnyEvent and SockJS... I need help by xtpu2

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