https://bz.apache.org/bugzilla/show_bug.cgi?id=65958
Bug ID: 65958
Summary: mod_proxy_wstunnel doesn't use UDS (UNIX domain
socket) if pseudo-url points to valid virtualhost
Product: Apache httpd-2
Version: 2.4.37
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_proxy_wstunnel
Assignee: bugs@httpd.apache.org
Reporter: apache....@stefan-neufeind.de
Target Milestone: ---
Environment is a ruby-application with his own puma-webserver running on a
unix-socket.
I was using a SSL-virtualhost to provide an application, internally http over
the unix-socket was used instead of https.
What works fine with mod_proxy_http:
ProxyPass / unix:///home/user/puma.sock|http://localhost/
ProxyPassReverse / unix:///home/user/puma.sock|http://localhost/
To use a URL with websockets over the same socket I used:
ProxyPass /cable unix:///home/user/puma.sock|ws://localhost/cable
ProxyPassReverse /cable unix:///home/user/puma.sock|ws://localhost/cable
Logs showed that it actually connected to localhost:80 instead of using the
unix-socket. I suspect that is due to the fact that a virtualhost exists on
port 80.
proxy_util.c(3090): AH02824: WS: connection established with [::1]:80 (*)
But for mod_proxy_http it worked as expected and can also be seen in the
proxy-log:
proxy_util.c(2431): [client 2a02:908:963:dc00::bcd8:52894] AH02545: http: has
determined UDS as /home/user/puma.sock
What worked fine was using some dummy-port (which does not exist!) in the
pseudo-url:
ProxyPass /cable unix:///home/user/puma.sock|ws://localhost:666/cable
ProxyPassReverse /cable unix:///home/user/puma.sock|ws://localhost:666/cable
This then also triggers the WS-handler to collectly use UDS.
Since http and wstunnel behave different in this regard, I wonder whether it is
possible to unify their behaviour. And since I provided a unix-socket the
expected behaviour would of course be to use that UDS no matter what URL is
specified after the pipe (as long as it begins with ws:// or wss:// to trigger
using the WS-handler).
Unfortunately I can't retest this with a newer Apache than 2.4.37 in the
current setup currently. I found in the docs that probably in 2.4.47 there were
changes in mod_proxy_wstunnel?
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