varnish-4.x VCL之User-Agent
示例:
sub vcl_recv {
if (req.http.User-Agent ~ "iPad" ||
req.http.User-Agent ~ "iPhone" ||
req.http.User-Agent ~ "Android") {
set req.http.X-Device = "mobile";
} else {
set req.http.X-Device = "desktop";
}
}