I created a sub-server and activated a proxy path to forward all traffic incl. Websockets to a docker container.
If I open the webpage with Firefox, I see the following message in the developer console:
Firefox can’t establish a connection to the server at wss://test.domainname.de/api/v1/ws
The same problem with Chrome.
Because as a new user I can’t upload files here, I uploaded the original generated apache virtual host config file here: dpaste: CA5DP8CUM
First necessary fix is to add RewriteEngine on also in the :443 section. Somehow this is missing in my setup.
Now the websocket connection started working with Chrome browser, but for Firefox it is still not working.
In the Web-Developer tools in Firefox I found, that the Request header Connection is not only filled with “Upgrade”: Connection: keep-alive, Upgrade
So I think we have to replace
RewriteCond %{HTTP:CONNECTION} ^Upgrade$ [NC] by
RewriteCond %{HTTP:CONNECTION} Upgrade [NC]
to get websockets running also in Firefox.
| SYSTEM INFORMATION | |
|---|---|
| OS type and version | Ubuntu 24.04 |
| Webmin version | 2.202 |
| Virtualmin version | 7.20.2 |
| Webserver version | Apache/2.4.58 (Ubuntu) |