HTTP status code selection does not allow 0

[julianbraasch]

📑 I have found these related issues/pull requests

None

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Description

I'm using the gRPC keyword monitor type which I would like to connect to a ChirpStack instance.
I did confirm that my proto file and method are correct by using Postman for the same request. I noticed that Postman lists "0 OK" as the status code of the response. However, I am unable to add 0 as my desired status code in Uptime Kuma. I am not sure if this is actually the reason why this monitor fails.

👟 Reproduction steps

Add new gRPC monitor

👀 Expected behavior

The monitor returns the response of my proto service

😓 Actual Behavior

The monitor reports a failed connection. Ping statistics are available through. No entries in the event list of the monitor itself.

🐻 Uptime-Kuma Version

1.23.15

💻 Operating System and Arch

macOS 15.1

🌐 Browser

Google Chrome 130.0.6723.119

🖥️ Deployment Environment

• Runtime: Docker 4.35.1
• Database: Docker volume
• Filesystem used to store the database on: APFS on a SSD
• number of monitors: 1

📝 Relevant log output

[MONITOR] WARN: Monitor #1 'ChirpStack': Failing: Error in send gRPC 8 Received message larger than max (1752460652 vs 4194304) | Interval: 20 seconds | Type: grpc-keyword | Down Count: 0 | Resend Interval: 0

[CommanderStorm]

Received message larger than max

What is the message that the grpc endpoint is responding with?

[julianbraasch]

The result JSON contains a single entry called jwt which contains a JSON Web Token, which admittedly can be quite long

[CommanderStorm]

If the message is referring to bits, that would be 219 MB.
If it's bytes that would be 1.7GB

Having a limit against such requests is reasonable.
In postman what is the size of the message in MB?

[julianbraasch]

I concur with enforcing request limits, but I can assure you they are orders of magnitude lower. The response in Postman was just 250 bytes long.

{
    "jwt": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJhdWQiOiJjaGlycHN0YWNrIiwiZXhwIjoxNzMyMDk3MDc3LCJpc3MiOiJjaGlycHN0YWNrIiwic3ViIjoiMDUyNDRmMTItNmRhZi00ZTFmLTgzMTUtYzY2NzgzYTBhYjU2IiwidHlwIjoidXNlciJ9.ZnWatLRzzb3EMo5VVEes-3wzhD3ePJpqt02zqyGnmSs"
}

[CommanderStorm]

Interesting.
So not really exceeding the limit...