去除请求path前缀

1. proxy_pass后面加根路径/

location ^~/user/ {
    proxy_set_header Host $host;
    proxy_set_header  X-Real-IP        $remote_addr;
    proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
    proxy_set_header X-NginX-Proxy true;

    proxy_pass http://user/;
}

^~/user/表示匹配前缀是user的请求，proxy_pass的结尾有/，则会把/user/*后面的路径直接拼接到后面，即移除user。

2. 使用rewrite

location ^~/user/ {
    proxy_set_header Host $host;
    proxy_set_header  X-Real-IP        $remote_addr;
    proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
    proxy_set_header X-NginX-Proxy true;

    rewrite ^/user/(.*)$ /$1 break;
    proxy_pass http://user;
}