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respond() unconditionally echoed the response body regardless of
status code. Per RFC 9110 §15.3.5 (204 No Content) and §15.4.5 (304
Not Modified), neither response may include a message body.
Confirmed via a real Joomla CMS API DELETE: PHP's built-in dev server
plus a strict HTTP/1.1 client (Playwright's Node HTTP client) fails to
parse the response at all ("Parse Error: Data after `Connection:
close`"), because a 204 is carrying a non-empty JSON:API body. Apache
is more lenient about the extra bytes, which is likely why this has
gone unnoticed.
Also skips the Content-Type header specifically for 204, since a 204
has no representation to describe. 304 keeps it deliberately -- per
RFC 9110 §15.4.5 a 304 is expected to carry the same representation
metadata headers the 200 it validates would have sent; only the body
is withheld.
Reported at joomla/joomla-cms#48553, traced
upstream to this package per @brianteeman's comment there.
This was referenced Oct 2, 2026
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Summary
respond()unconditionally echoes the response body regardless of status code. Per RFC 9110 §15.3.5 (204 No Content) and §15.4.5 (304 Not Modified), neither response may include a message body.Also skips the
Content-Typeheader specifically for 204, since a 204 has no representation to describe. 304 deliberately keeps it -- per §15.4.5 a 304 is expected to carry the same representation metadata headers the 200 it validates would have sent; only the body is withheld.Found via
A real Joomla CMS API
DELETE: PHP's built-in dev server plus a strict HTTP/1.1 client (Playwright's Node HTTP client) fails to parse the response at all (Parse Error: Data after \Connection: close``), because the 204 carries a non-empty JSON:API body. Apache is more lenient about the extra bytes, which is likely why this has gone unnoticed in practice.Reported at joomla/joomla-cms#48553, traced to this package per @brianteeman's comment there.
Testing
Two new tests added, mirroring the existing
testRespond()/testRespondWithAllowedCaching()pattern: one asserting no body and no Content-Type for 204, one asserting no body but Content-Type preserved for 304. Full existing suite still passes.Companion PR
Same fix on
3.x-dev, since Joomla 5 still pinsjoomla/application^3.0: #156