Nginx实现不同域名输出不同的主机头信息方法

location / {
if ( $host = 'segmentfault.com' ){
more_set_headers 'Server: Nginx';
}
if ( $host = '0x01.segmentfault.com' ){
more_set_headers 'Server: Nginx_improved';
}
....
}

map $host $server_x_tag{
'segmentfault.com' 'Nginx';
'0x01.segmentfault.com' 'Nginx_improved';
default 'Nginx';
}

server{
server_name 123;
location / {
more_set_headers 'Server: $server_x_tag';
}
}