Resilio Sync with nginx reverse proxy - v2.7.2(1375) OK

vhost.conf

  location /btsync/ {
    proxy_pass http://127.0.0.1:8888/gui/;
    sub_filter '/gui/token.html' 'token.html';
    sub_filter '/gui/' '';
    sub_filter_types text/javascript
    sub_filter_once off;
    proxy_set_header Cookie $http_cookie;
    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_connect_timeout 300;
    proxy_send_timeout 300;
    proxy_read_timeout 300;
    proxy_buffering off;
  }

Nginx should be built with '--with-http_sub_module' to make the filter work.

The problem is that the dev of resilio wrote the absolute path in js.
So the application doesn't care about the subdirectory of Nginx reverse proxy.