Akkor az a böngésző objektíven szar és nem ismeri a HTTP protokollt:
This means that clients, servers, and proxies MUST be able to recover
from asynchronous close events. Client software SHOULD reopen the
transport connection and retransmit the aborted sequence of requests
without user interaction so long as the request sequence is
idempotent (see section 9.1.2). Non-idempotent methods or sequences
MUST NOT be automatically retried, although user agents MAY offer a
human operator the choice of retrying the request(s).
(https://tools.ietf.org/html/rfc2616#section-8.1.4 - Kiemelés tőlem)
A POST expliciten non-idempotent.
BlackY
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"en is amikor bejovok dolgozni, nem egy pc-t [..] kapcsolok be, hanem a mainframe-et..." (sj)