NameVirtualHost *:80
<VirtualHost *:80>
    ServerName app.mysite
    ServerAlias www.app.mysite
    ProxyPreserveHost On
    <Proxy *>
        AddDefaultCharset Off
        Order deny,allow
        Allow from all
    </Proxy>
    ProxyPass / http://mysite:9023/
    ProxyPassReverse / http://mysite:9023/
</VirtualHost>

NameVirtualHost *:443
<VirtualHost *:443>
    ServerName app.mysite
    ServerAlias www.app.mysite
    ProxyPreserveHost On
    SSLEngine On
    SSLCertificateFile    "C:apachehttpdconfserver.crt"
    SSLCertificateKeyFile "C:apachehttpdconfserver.key"
    <Location />
        SSLRequireSSL
    </Location>
   ProxyPass / http://mysite:9023/
   ProxyPassReverse / http://mysite:9023/
</VirtualHost>

https://app.mysite

ProxyPass / http://mysite:9023/
ProxyPassReverse / http://mysite:9023/