https://httpd.apache.org/docs/2.4/mod/mod_proxy_wstunnel.html
clearly states that proxying a websocket is as simple as
ProxyPass "/ws2/" "ws://echo.websocket.org/"
yet no matter what I do I keep getting
==> /var/log/apache2/domain.com-access_log <==
192.168.240.1 - - [29/Mar/2022:20:46:40 +0000] "GET /url-to-proxy/?query-stuff HTTP/1.1" 502 2554
==> /var/log/apache2/domain.com-error_log <==
[Tue Mar 29 20:46:40.096767 2022] [proxy:error] [pid 56] [client 192.168.240.1:54536] AH00898: Unexpected Upgrade: websocket (expecting n/a) returned by /url-to-proxy/
$ cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 11 (bullseye)"
[...]
$ apache2 -v
Server version: Apache/2.4.51 (Debian)
Server built: 2021-10-07T17:49:44
I followed this stackoverflow answer
and used
RewriteEngine On
RewriteCond %{HTTP:Connection} Upgrade [NC]
#RewriteCond %{HTTP:Upgrade} websocket [NC]
RewriteCond %{HTTP:Upgrade} =websocket [NC]
RewriteRule /(.*) ws://127.0.0.1:3000/$1 [P,L]
ProxyRequests off
#ProxyPass / http://127.0.0.1:3000/
ProxyPass /url-to-proxy/ http://127.0.0.1:3000/
#ProxyPass / ws://127.0.0.1:3000/
#ProxyPass /url-to-proxy/ ws://127.0.0.1:3000/
tried with/without RewriteRule/ProxyRequests off/ProxyPassReverse with 'http' or 'ws' or '/' or '/url-to-proxy/' in ProxyPass
but I always get the same error
could this be related: https://bz.apache.org/bugzilla/show_bug.cgi?id=55598
I would like to think a bug from 2016 has been back ported by now to a docker image that is only two months old... (wordpress:5.8.3-php7.4-apache)
