bug: apisix 3.0 v3_adapter.filter(data) causes some API response body empty when disabling v3 admin API

[zlhgo]

Current Behavior

apisix/apisix/admin/v3_adapter.lua

Line 180 in 2f4a4db

return

Perhaps should be return body ?

Expected Behavior

No response

Error Logs

No response

Steps to Reproduce

curl http://127.0.0.1:9180/apisix/admin/routes -H "X-API-KEY: ******" -i

Environment

• APISIX version (run apisix version): 3.0
• Operating system (run uname -a):
• OpenResty / Nginx version (run openresty -V or nginx -V):
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info):
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):

[spacewander]

Good catch! Would you like to submit a PR to fix it? Let's add tests in https://github.com/apache/apisix/blob/master/t/admin/api.t to verify the behavior.