controller 0.1.5

Metadata-driven HTTP controllers without mirrors

Controller

Controller is a library that facilitates writing HTTP request handlers with Shelf.

Features

• Request mapping
• Validation
• Security

Getting started

Add the Controller libraries to pubspec.yaml:

dependencies:
  controller: ^0.1.4
  json_annotation: ^4.5.0

dev_dependencies:
  build_runner: ^2.1.10
  controller_generator: ^0.1.4
  json_serializable: ^6.2.0

Usage

• Add the @controller metadata to the class where you want to handle requests.
• Annotate handler methods with HTTP verbs (@Get, @Put, @Delete, ...).
• Use @body to deserialize a JSON body to an object.
• Start path parameters with a semicolon.

import 'package:controller/controller.dart';
import 'package:shelf/shelf.dart';

part 'todo_controller.g.dart';

@controller
class TodoController {
  @Post('/todos')
  Future<Response> addTodo(@body Todo todo) {
    // implementation goes here
  }

  @Get('/todos/:id')
  Future<Response> getTodo(String id) {
    // implementation goes here
  }
}

• Annotate classes mapped to the request body with @validatable.
• Annotate fields with validator metadata.
• Add a fromJson() factory method.

import 'package:controller/controller.dart';
import 'package:json_annotation/json_annotation.dart';

part 'todo.g.dart';

@validatable
@JsonSerializable()
class Todo {
  @notEmpty
  final String id;
  @notEmpty
  final String description;

  Todo({
    required this.id,
    required this.description,
  });

  factory Todo.fromJson(Map<String, dynamic> json) => _$TodoFromJson(json);
}

Run dart run build_runner build to generate dispatcher builders and validators.

Create the request dispatcher with the generated dispatcher builders and wire it in Shelf:

import 'package:controller/controller.dart';
import 'package:shelf/shelf.dart';
import 'package:shelf/shelf_io.dart';
import 'todo/todo_controller.dart';

void main() async  {
  var todoController = TodoController();
  var dispatcher = createRequestDispatcher([
    TodoController$DispatcherBuilder(todoController),
  ]);
  var handler = Pipeline().addHandler(dispatcher);
  var server = await serve(handler, '0.0.0.0', 8080);
}