# HarperDB ACL-Connect

This component allows you define a set of topics for pub/sub (MQTT) with ACLs specifying permissions.

To use this, add `@harperdb/acl-connect` to your projects dependencies and then add this extension to your application's config.yaml:
```yaml
acl-connect:
  package: "@harperdb/acl-connect"
  database: data # The database to use for pub/sub
  file: connect.json
```

And connect.json should be a JSON file with the following format:
```json
{
  "acls": [
    {
      "topicFilter": "topic/sub-topic/#",
      "publishers": [
        "a-group",
        "another-group"
      ],
      "subscribers": [
        "another-group"
      ]
    },
    ...
  ]
}
```
Topics support substitution with `%u` for the user's username and `%c` for the client id. For example, a topic of `user/%u` would be translated to `user/smith` for a user with the username `smith`.


### Anonymous Subscriptions
In order for anonymous subscriptions to work correctly:

`requireAuthentication` must be set to `false` in your harper config. For example:
```yaml
# In harperdb-config.yaml
mqtt:
    requireAuthentication: false
```

A component for defining pub/sub (MQTT) topics and their access control lists (ACLs) in HarperDB. 

@harperdb/acl-connect

A component for defining pub/sub (MQTT) topics and their access control lists (ACLs) in HarperDB

ethan_arrowood

harperdb_team

deliciousmonster

kriszyp

jakehdb

devinhdb

harper-joseph

acl-connect

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@harperdb/acl-connect

HarperDB ACL-Connect

Anonymous Subscriptions

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