How to change the signalr emulator access keys?

[tweaktheboss]

I searched the whole web regarding it and there is really no information about changing the default access key: ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789ABCDEFGH

Endpoint=http://0.0.0.0;Port=8888;AccessKey=ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789ABCDEFGH;Version=1.0

I want to change the access keys, is that possible?

This is my dockerfile:

FROM mcr.microsoft.com/dotnet/sdk:8.0

# Create and switch to a non-root user
RUN useradd -ms /bin/bash nonroot && \
    mkdir -p /home/nonroot/signalr && \
    chown -R nonroot:nonroot /home/nonroot

USER nonroot
WORKDIR /home/nonroot/signalr

# Install the SignalR Emulator
RUN dotnet tool install --global Microsoft.Azure.SignalR.Emulator

# Update PATH to include user's dotnet tools
ENV PATH="/home/nonroot/.dotnet/tools:${PATH}"

# Start the emulator with the custom access key
ENTRYPOINT ["asrs-emulator", "start", "-i", "0.0.0.0"]

My docker compose:

  signalr-emulator:
    container_name: signalr-emulator
    image: signalr-emulator:latest
    build:
      dockerfile: signalr/Dockerfile
    networks:
      - marble-network
    env_file:
      - .env.signalr
    volumes:
      - signalr:/home/nonroot/.aspnet
      - ./signalr/signalr-settings.json:/home/nonroot/signalr/settings.json
      - ./signalr/signalr-appsettings.json:/home/nonroot/signalr/appsettings.json
    ports:
      - "7071:7071"
      - "9999:8888"

signalr-appsettings.json

{
    "Logging": {
      "LogLevel": {
        "Default": "Information",
        "Microsoft": "Warning",
        "Microsoft.Hosting.Lifetime": "Warning"
      }
    },
    "AllowedHosts": "*",
    "AccessKey": "This key is not working but included in: https://github.com/Azure/azure-signalr/blob/dev/src/Microsoft.Azure.SignalR.Emulator/appsettings.json and the file is being read according to the logs when running 'asrs-emulator start -i 0.0.0.0' | I also looked at the source code of the said repo, and it seems that the Access Key is hardcoded??"
}

signalr-settings.json

{
    "UpstreamSettings": {
        "Templates": [
            {
                "UrlTemplate": "http://0.0.0.0:7071/runtime/webhooks/signalr",
                "EventPattern": "*",
                "HubPattern": "*",
                "CategoryPattern": "*"
            }
        ]
    }
}

My main issue is where do i set the custom access key? Is it on an environment or a parameter in asrs-emulator? Because according to it's help command, there is no such parameter for setting the custom access key. Its fixed to this:

Endpoint=http://0.0.0.0;Port=8888;AccessKey=ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789ABCDEFGH;Version=1.0

References:
#969

[vicancy]

Could you share why you want to change the AccessKey?

[tweaktheboss]

Hello @vicancy :) We want to use it on a dockerized azure functions app and a static web app locally in our LAN network. Meaning there is no internet.

We have the same codebase for online that is hosted in azure and we have something that is offline, where all data are in-premises. meaning on a LAN network only. We need it for security purposes.

[vicancy]

Hi @tweaktheboss , thanks for sharing more about your use case, happy to hear that emulator is also used in LAN network.

At this time, this feature not in the roadmap of the emulator. However, since our emulator is open-sourced (with AccessKey is set here

azure-signalr/src/Microsoft.Azure.SignalR.Emulator/Startup.cs

Line 78 in ca2d207

Endpoint={address.Scheme}://{address.Host};Port={address.Port};AccessKey={AppBuilderExtensions.AccessKey};Version=1.0;

), we’d love to encourage contributions from the community! If this is a critical feature for your use case, we welcome you to contribute the implementation. We’d be happy to review and collaborate on a pull request to ensure it aligns well with the project!