新增proxy_request_buffering off;

data-nginx/nginx.conf

@@ -21,6 +21,7 @@ http {
     proxy_buffers 512 256k;
     proxy_busy_buffers_size 256k;
     proxy_temp_file_write_size 256k;
+    proxy_request_buffering off;
     sendfile        on;
     keepalive_timeout  25m;
     gzip on;