Dingding notifier is not supporting robot with sign

[ctwkongmu]

What happened:
When create a new alerting channel to dingding robot with sign for its security setting, grafana fails to fire test notification to dingding.

What you expected to happen:

After click on test in the new alerting channel page in grafana, a testing message should appear in the dingding channel.

How to reproduce it (as minimally and precisely as possible):

1. Create dingding robot on a channel with sign(加签) as its security setting
2. Copy access url
3. Go to grafana and add alerting channel.
4. Add channel with the access url as follow
   
5. Click test button at the bottom
6. On the right top corner, it says "notification sent"

Then nothing happens

Anything else we need to know?:

Seems in the source code grafana is not adding timestamp and sign as query strings in the rendered url.
https://github.com/grafana/grafana/blob/main/pkg/services/alerting/notifiers/dingding.go

Environment:

• Grafana version: v7.4.3 (010f20c1c8)
• Data source type & version:
• OS Grafana is installed on: EC2
• User OS & Browser:
• Grafana plugins:
• Others:

[idafurjes]

@ctwkongmu Could you provide the error stacktrace?

[Ariesly]

There is no place to configure the secretKey.

The implementation related is similar to uptime-kuma.
dingding.js#L54

The following is the relevant explanation from the official documentation.
https://open.dingtalk.com/document/robots/custom-robot-access