bug: rejected_msg not working in limit-count plugin

[tinpad]

Issue description

I am using below request to setup limit-count as global rule.

curl http://127.0.0.1:9080/apisix/admin/global_rules/111 -H 'X-API-KEY: xxxxxxxxxxxxxxxxxxxx' -X PUT -d '
{
"plugins": {
"limit-count": {
"time_window": 60,
"policy": "local",
"count": 10,
"key": "remote_addr",
"rejected_code": 429,
"rejected_msg" : "{"message":"Request Limit Exceeded"}"
}
}
}'
When I hit the below route and the count exceeds the count 10 -

http://127.0.0.1:9080/order/list?pageSize=10

I am getting 429 but not getting the response in json format as mentioned in the above route.
I am getting following html content -

<title>429 Too Many Requests</title>

429 Too Many Requests

---

openresty

Environment

• apisix version (cmd: apisix version): 2.8
• OS (cmd: uname -a): 20.04.1-Ubuntu
• OpenResty / Nginx version (cmd: nginx -V or openresty -V): openresty/1.19.3.2
• etcd version, if have (cmd: run curl http://127.0.0.1:9090/v1/server_info to get the info from server-info API): 3.4.0
• apisix-dashboard version, if have: NA
• the plugin runner version, if the issue is about a plugin runner (cmd: depended on the kind of runner):
• luarocks version, if the issue is about installation (cmd: luarocks --version): 3.4.0

Steps to reproduce

as mentioned above, if we exceed the request count more than 10

Actual result

<title>429 Too Many Requests</title>

429 Too Many Requests

---

openresty

Error log

2021/09/21 13:57:03 [warn] 2926#2926: *85612 [lua] plugin.lua:658: run_plugin(): limit-count exits with http status code 429, client: 127.0.0.1, server: _, request: "GET /order/list?pageSize=10 HTTP/1.1", host: "127.0.0.1:9080"

Expected result

{"message":"Request Limit Exceeded"}

[tokers]

@tinpad Have you ever tried to check out the route object by using the GET API?

[tinpad]

@tokers I am getting below json with get api

{
"node": {
"dir": true,
"nodes": [
{
"createdIndex": 1989,
"key": "/apisix/global_rules/111",
"modifiedIndex": 3019,
"value": {
"plugins": {
"limit-count": {
"key": "remote_addr",
"rejected_code": 429,
"redis_database": 0,
"policy": "local",
"time_window": 60,
"rejected_msg": "{"message":"Request Limit Exceeded"}",
"count": 10
},
"uri-blocker": {
"block_rules": [
"script.bat",
"script.sh",
"script.exe"
],
"rejected_code": 403
},
"http-logger": {
"retry_delay": 1,
"timeout": 3,
"uri": "http://192.168.1.2:8060/logger/log",
"auth_header": "",
"buffer_duration": 60,
"batch_max_size": 1000,
"include_req_body": false,
"inactive_timeout": 5,
"max_retry_count": 0,
"name": "http logger",
"concat_method": "json"
},
"basic-auth": {},
"prometheus": {
"prefer_name": false
}
},
"id": "111",
"update_time": 1632221711,
"create_time": 1631798886
}
}
],
"key": "/apisix/global_rules"
},
"count": "3",
"action": "get"
}

[spacewander]

The rejected_msg is added in 2.9: #4808
So APISIX 2.8 doesn't support it.