aqueduct经验

代码示例

import 'aqueduct/aqueduct.dart';

class MyAppChannel extends ApplicationChannel {
  @override
  Future prepare() async {
    // 初始化数据库连接等操作
  }

  @override
  Controller get entryPoint {
    final router = Router();

    // 1. 网站端口为6081
    router.route('/').linkFunction((request) async {
      return Response.ok('Hello, world!')
        ..contentType = ContentType.html;
    });

    // 2. 使用orm接口进行数据增删查改访问，过程要求通过非ID字段进行查找数据
    router.route('/items').link(() => ItemsController(context));

    // 3. 使用token进行权限验证
    router.route('/secure').link(() => SecureController());

    // 4. 接收前端上传的图片文件并保存
    router.route('/upload').link(() => UploadController());

    return router;
  }
}

class ItemsController extends ResourceController {
  final ManagedContext context;

  ItemsController(this.context);

  @Operation.get()
  Future<Response> getItems(@Bind.query('name') String name) async {
    final query = Query<Item>(context)
      ..where((item) => item.name).equalTo(name);

    final items = await query.fetch();

    // 5. 将数据库返回的false和true转化为可授权和不可授权后返回前端
    final transformedItems = items.map((item) {
      return {
        'name': item.name,
        'authorized': item.authorized ? '可授权' : '不可授权'
      };
    }).toList();

    // 6. 返回前端的数据中带有前端自己的访问ip
    final clientIP = request.connectionInfo.remoteAddress.address;

    return Response.ok(transformedItems)
      ..contentType = ContentType.json
      ..write(clientIP);
  }
}

class SecureController extends ResourceController {
  @Operation.get()
  Future<Response> getSecureData() async {
    // 验证token逻辑
    if (/* token验证通过 */) {
      return Response.ok('Secure Data');
    } else {
      return Response.forbidden();
    }
  }
}

class UploadController extends ResourceController {
  @Operation.post()
  Future<Response> uploadFile(@Bind.multipart('file') FileUpload file) async {
    // 保存上传的文件逻辑
    final savedFilePath = /* 保存文件的路径 */;
    return Response.ok('File uploaded: $savedFilePath');
  }
}

class Item extends ManagedObject<_Item> implements _Item {}

class _Item {
  @primaryKey
  int id;

  @Column(unique: true)
  String name;

  @Column(defaultValue: 'false')
  bool authorized;
}

Future main() async {
  final app = Application<MyAppChannel>()
    ..options.configurationFilePath = 'config.yaml';

  await app.start(numberOfInstances: 3);
}