利用Access-Control-Allow-Origin允许指定多个域名跨域

add_header Access-Control-Allow-Origin *;

add_header Access-Control-Allow-Origin https://ipkd.cn;

set $cors_origin "";
if ($http_origin ~* "^https://ipkd.cn$") {
  set $cors_origin $http_origin;
}
if ($http_origin ~* "^https://echarts.ipkd.cn$") {
  set $cors_origin $http_origin;
}
add_header Access-Control-Allow-Origin $cors_origin;

add_header Access-Control-Allow-Origin https://ipkd.cn,https://echarts.ipkd.cn;