nginx根據http請求，將JSON的請求轉發到后端，將非JSON請求，轉發到前端

nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;

    server {
        listen       22816;
        #server_name  localhost;
        location / {
        　　if ($http_accept ~* .*json.*) {
        　　　　proxy_pass http://IP_1:8082;
        　　　　break;
        　　}
        　　proxy_pass http://IP_2:8081;
        }
    }

}