问带有map的"“中的nginx URL前缀无效

EN

user www-data;
worker_processes auto;
pid /run/nginx.pid;

events {
        worker_connections 768;
        # multi_accept on;
}


http {

    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /var/log/nginx/access.log  main;
    sendfile        on;
    keepalive_timeout  65;

    map $request_uri $target {
        #default http://127.0.0.1:9200;
        ~^/kibana-dev http://127.0.0.1:9200;
        ~^/kibana-test http://127.0.0.1:9100;
    }

    server {

        listen 80 default_server;
        listen [::]:80 default_server ipv6only=on;

        if ( $request_uri ~* ^/kibana-test ) {
        return 301 http://my.domain.com/_plugin/kibana;
        }

        if ( $request_uri ~* ^/kibana-dev ) {
        return 301 http://my.domain.com/_plugin/kibana;
        }

        location / {
        proxy_set_header X-Real-IP 1.2.3.4;
        proxy_http_version 1.1;
        proxy_set_header Connect "Keep-Alive";
        proxy_set_header Proxy-Connection "Keep-Alive";
        proxy_set_header Authorization "";
        proxy_pass $target;
        }

    }
}             

map $uri $target {
        /kibana-dev http://127.0.0.1:9200;
    }