IDN mod_http_upload failure

[Millesimus]

Environment

• ejabberd version: 21.01
• Erlang version: 9.3.3.6

Bug description

I have an IDN domain (with an umlaut) as host in my ejabberd config. Certificates are issued for the domain in punycode. File upload via mod_http_upload from Conversations 2.9.6 to the internal fileserver would fail with standard configuration, so here is what I tried:

Working

1

host: punycode
put_url: @host@
comment: Works, but nobody wants JIDs in punycode.

2

host: unicode
put_url: punycode

Failing

1

host: unicode
put_url: @host@

2

host: unicode
put_url: unicode

In the failing cases, ejabberd logs that it cannot handle a put request to the host (written in punycode). From the discussion in the Conversations MUC i assume that while Conversations sends http headers (correctly) with punycode, ejabberd should transform them to unicode when interpreting them as host.