nginx的proxy_pass如何使用变量参数

Question

server {
listen 80;
server_name .m.abc.com;
if ( $host ~ ^([^.]+).([^.]+).([^.]+).([^.]+)$ ) {
set $subdomain $1;
set $mD2 $2.$3.$4;
#set $d2 $2;
#set $d3 $3;
#set $d4 $4;
#set $mD2 http://$2.$3.$4/;
}
location / {
rewrite ^/$ /index.jsp?cdm=$subdomain last;
proxy_pass http://m.abc.com/; #可以正常访问
#proxy_pass http://$mD2/; # 502 bad gateway
#proxy_pass http://$d2.abc.com/;# 502 bad gateway
#proxy_pass http://${d2}.${d3}.${d4}/;# 502 bad gateway
#proxy_pass $mD2/;# 502 bad gateway
}
}
请问如何用 变量“$d2 $d3 $d4” 代替 http://m.abc.com/

Answer 1

更正 server_name *.m.abc.com;