alexa_skill 0.0.2

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Unofficial Dart library for building Alexa skills as Web services.

alexa_skill #

Pub build status

Unofficial Dart library for building Alexa skills as Web services.

Again, this is not an Amazon product.

Usage #

The main functionality of this library is providing JSON models and constants that correspond to all of the standard request and response types for Alexa. In addition, there is a high-level API built on this foundation that closely resembles the official Java SDK.

See example/example.dart for an example Hello world server that you can run directly, using package:shelf.

TODO: More docs here

High Level Usage #

The high-level API closely follows the official Java SDK, and provides:

  • Request handler classes and infrastructure
  • Session/request/persistent storage infrastructure
  • A package:shelf adapter

Below is a contrived example, using RequestHandler classes and the AlexaSkill wraper class:

class HelloWorldHandler extends AlexaLaunchRequestHandler {
  @override
  bool canHandleTyped(
          AlexaHandlerInput handlerInput, AlexaLaunchRequest request) =>
      true;

  @override
  AlexaResponseEnvelope handleTyped(
      AlexaHandlerInput handlerInput, AlexaLaunchRequest request) {
    return handlerInput.responseBuilder
        .withSpeech('Hello, world!')
        .withShouldEndSession(true)
        .response;
  }
}

main() async {
  var skill = AlexaSkill()..requestHandlers.add(HelloWorldHandler());
  await shelf_io.serve(alexaSkillHandler(skill), '127.0.0.1', 3000);
  print('Listening at http://127.0.0.1:3000');
}

Low Level Usage #

Below is a contrived example:

var bodyAsMap = await parseRequestJson();
var requestEnvelope = alexaRequestEnvelopeSerializer.decode(bodyAsMap);
var responseEnvelope = AlexaResponseEnvelope();

if (requestEnvelope.requestType == AlexaRequestType.launchRequest) {
  // Send a basic text response.
  responseEnvelope.response = AlexaResponse(
    outputSpeech: AlexaOutputSpeech(
      type: AlexaOutputSpeechType.plainText,
      text: 'Hello, world!',
    ),
  );
} else if (requestEnvelope.requestType !=
    AlexaRequestType.sessionEndedRequest) {
  // Do something...
}

request.response
  ..headers.contentType = ContentType.json
  ..write(json.encode(responseEnvelope));
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Unofficial Dart library for building Alexa skills as Web services.

Repository (GitHub)
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Documentation

API reference

Uploader

thosakwe@gmail.com

License

LGPL 3.0 (LICENSE)

Dependencies

angel_serialize, asn1lib, charcode, crypto, http, path, shelf, string_scanner, x509csr

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