A fundamental for all html server applications is a call to get the IP address of the remote client.
This address is used to: 1) log the details of the client 2) facilitate basic IP blocking against hackers
Strangely there is a remote ip call in the wifi101 udp library ( WiFiUDP.remoteIP() ) and nothing for server/client applications.
Previous arduino wifi/ethernet libraries have supported remoteip for servers.
I would like to see the situation remedied and would be interested to read comments from others.