apache proxy configuration for socket.io (project not in root)

Question

I know there are several questions like this but i can't find one solving my problem for a project which is not in the server root. I have the following situation: I have an Apache server which runs several projects like:

 0.0.0.0/project1
 0.0.0.0/project2

I added a node.js project let's call it nodeproject. With ProxyPass I am passing requests made to 0.0.0.0/nodeproject to 0.0.0.0:8080 where my node server is running. This is all working fine except the websocket configuration for socket.io.

In my /etc/apache2/apache2.conf file i placed this code to do the proxying. mod_proxy_wstunnel is enabeld Which i basically copied from here.

ProxyRequests off
ProxyVia on

RewriteEngine On
RewriteCond %{REQUEST_URI}  ^/nodeproject/socket.io            [NC]
RewriteCond %{QUERY_STRING} transport=websocket    [NC]
RewriteRule /(.*)           ws://localhost:8080/$1 [P,L]

ProxyPass        /nodeproject/socket.io http://localhost:8080/socket.io
ProxyPassReverse /nodeproject/socket.io http://localhost:8080/socket.io

<Location /nodeproject>
    ProxyPass http://localhost:8080
    ProxyPassReverse http://localhost:8080
</Location>

The failing request looks like this:

ws://0.0.0.0/nodeproject/socket.io/?EIO=3&transport=websocket&sid=MDuVcHmt3T1sa8ruAAAa

and i get a Bad Request 400 response.

I am not an expert in configuring this kind of stuff where did I go wrong?

Thanks in advance!

Answer 1

You shouldn't put the rewrite conditional in the /etc/apache2/apache2.conf, but in the virtual host directive in /etc/apache2/sites-available/000-project-whatever.conf.

Here's an example from one of my own little projects.

<VirtualHost *:80>

ServerName sockey.api
ServerAdmin webmaster@localhost
DocumentRoot /var/www/sockey.api
<Directory /var/www/sockey.api>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride All
            Order allow,deny
            allow from all
</Directory>

ErrorDocument 404 /index.html
ErrorLog ${APACHE_LOG_DIR}/sockey.api.error.log
CustomLog ${APACHE_LOG_DIR}/sockey.api.access.log combined

RewriteEngine On
RewriteCond %{REQUEST_URI}  ^/socket.io            [NC]
RewriteCond %{QUERY_STRING} transport=websocket    [NC]
RewriteRule /(.*)           ws://localhost:8081/$1 [P,L]

ProxyPass        /socket.io http://localhost:8081/socket.io
ProxyPassReverse /socket.io http://localhost:8081/socket.io

</VirtualHost>