Nginx conditions to deny *.appcache files to IOS7 users to avoid their severe bugs.

nginx.conf

# If IOS7 sees a *.appcache file it freaks out and disables browser
# history until browser cache is cleared AND it is rebooted.
# Tell IOS7 users asking for a *.appcache file to GTFO with a 412
# "precondition failed" response so they don't hurt themselves.
if ( $http_user_agent ~* '(iPad|iPhone);.*CPU.*OS 7_' ){
  set $test IOS7;
}
if ($request_filename ~* ^.+.appcache$) {
  set $test "${test}_APPCACHE";
}
if ($test = IOS7_APPCACHE){
  return 412;
}

+1

😀