Apache Proxy CORS configuration for fcm.googleapis.com

cors.conf

<VirtualHost *:80>
        ServerName domain.com  # configure your domain
       
        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html

        #Don't miss to enable mod_header and mod_proxy
        #replace fcm.googleapis.com in fcm endpoint registration
        ProxyRequests Off
        <Location /fcm/>
                RewriteEngine  On
                RewriteCond %{REQUEST_METHOD} !=OPTIONS
                RewriteRule "/fcm/(.*)" "https://fcm.googleapis.com/fcm/$1" [P]
                ProxyPassReverse "https://fcm.googleapis.com/fcm/"
                Header set Access-Control-Allow-Origin "*"
                Header set Access-Control-Max-Age 3600
                Header set Access-Control-Allow-Headers "x-requested-with, Content-Type, origin, authorization, accept, client-security-token, ttl, crypto-key, TTL, Crypto-K$
        </Location>
        
        #Custom file logs        
        ErrorLog ${APACHE_LOG_DIR}/fcmproxy.error.log
        CustomLog ${APACHE_LOG_DIR}/fcmproxy.access.log combined
       
        
</VirtualHost>