如何将我的服务层注入8月警卫？NestJS - AuthGuards

Question

我正在通过UseGuards创建一个身份验证系统，但是如何将依赖项注入到我的警卫中呢？我想以一种全局的方式来做，以避免重复代码和每个控制器导入注入。

我使用依赖反转和注入类的模式，我也使类只依赖于实现和接口规则.

我的AuthServices

export class AuthServices implements IMiddlewareAuth {
  constructor(
    private readonly jwt: IJWTDecrypt,
    private readonly authUserRepo: IAuthUserContract,
  ) {}

  public async intercept(
    req: IMiddlewareAuth.Attrs,
  ): Promise<IMiddlewareAuth.Return> {
    const token = req.headers['Authorization'];

    if (!token) {
      new Fails('Access denied', 403);
    }

    const parts = token.split(' ');
    if (parts.length !== 2) {
      return new Fails('Anauthorized', 401);
    }

    const [scheme, access] = parts;
    if (!/^Bearer$/i.test(scheme)) {
      return new Fails('Anauthorized', 400);
    }

    const id = await this.jwt.decrypt(access);
    if (!id) {
      return new Fails('Anauthorized', 400);
    }

    const user = await this.authUserRepo.findById(id);
    if (!user) {
      return new Fails('Anauthorized', 400);
    }

    return user;
  }
}

我的Auth.Guards

@Injectable()
export class AuthorizationGuard implements CanActivate {
  constructor(
    @Inject('AuthServices')
    private authServices: IMiddlewareAuth,
  ) {}

  public async canActivate(context: ExecutionContext): Promise<boolean> {
    const request = context.switchToHttp().getRequest();

    const user = await this.authServices.intercept(request);
    if (user instanceof Fails) {
      throw new HttpException(
        {
          statusCode: user.statusCode,
          error: user.message,
        },
        user.statusCode,
      );
    }

    request.user = {
      email: user.email,
      id: user.id,
      name: user.name,
    } as ISessionLogin;

    return true;
  }
}

我的Auth.Module

@Module({
  imports: [ConfigModule.forRoot(), TypeOrmModule.forFeature([UserEntity])],
  providers: [
    {
      provide: AuthUserRepository,
      useFactory: (dataSource: DataSource) => {
        return new AuthUserRepository(
          dataSource.getMongoRepository(UserEntity),
        );
      },
      inject: [getDataSourceToken()],
    },
    {
      provide: JsonWebToken,
      useFactory: () => {
        return new JsonWebToken();
      },
    },
    {
      provide: AuthServices,
      useFactory: (
        jwt: JsonWebToken,
        authUserRepository: AuthUserRepository,
      ) => {
        return new AuthServices(jwt, authUserRepository);
      },
      inject: [JsonWebToken, AuthUserRepository],
    },
  ],
  exports: [AuthServices],
})
export class AuthModule {}

错误

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​

Answer 1

使用@Inject(AuthService)而不是@Inject('AuthService')。重要的区别是'AuthService'是与AuthService.name匹配的字符串令牌，AuthService是类引用。另外，确保CreateUsersModule在其imports数组中有AuthModule。