Nginx反向代理Post参数丢失问题

location /aaa/api {
			proxy_pass http://127.0.0.1:8081/api;
}

location /aaa/api {
			proxy_pass http://127.0.0.1:8081/aaa/api;
}

location /aaa/ {
			proxy_pass http://127.0.0.1:8081/;
}