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Dart NATS Client

A Dart client for the NATS messaging system. Design to use with Dart and flutter.

Dart Examples

All examples can be found in example folder.

App permissions

Android permissions

For android you need to add to android/app/src/profile/AndroidManifest file lines:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

For activiy in backgroud:

<!-- Allows run app in background -->
<uses-permission android:name="android.permission.REQUEST_COMPANION_RUN_IN_BACKGROUND"/>
<!-- Allows app use data in background -->
<uses-permission android:name="android.permission.REQUEST_COMPANION_USE_DATA_IN_BACKGROUND"/>

iOS permissions

For iOS you don't need any specific permissions for NATS client.

But for background activity you need to add to file ios/Runner/Info.plist lines:

<key>UIBackgroundModes</key>
<array>
  <string>audio</string>
  <string>external-accessory</string>
  <string>fetch</string>
  <string>processing</string>
  <string>remote-notification</string>
</array>

Testing

For running unit-tests use dart test in project root folder.

NOTE. For testing you need run NATS in docker. Instruction

Features

The following is a list of features currently supported and planned by this client:

  • - Publish
  • - Subscribe, unsubscribe
  • - NUID, Inbox
  • - Reconnect to single server when connection lost and resume subscription
  • - Unsubscribe after N message
  • - Request, Respond
  • - Respond, Request example
  • - Queue subscribe
  • - caches, flush, drain
  • - Request timeout
  • - structured data
  • - Connection option (cluster, timeout,ping interval, max ping, echo,... )
  • - Random automatic reconnection, disable reconnect, number of attempts, pausing
  • - Connect to cluster,randomize, Automatic reconnect upon connection failure base server info
  • - Events/status disconnect handler, reconnect handler
  • - Buffering message during reconnect atempts
  • - All authentication models, including NATS 2.0 JWT and seed keys
  • - TLS support