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我有一个使用自定义拦截器的控制器:

控制器:

@UseInterceptors(SignInterceptor)
    @Get('users')
    async findOne(@Query() getUserDto: GetUser) {
        return await this.userService.findByUsername(getUserDto.username)
    }

我也有我的 SignService,它是 NestJwt 的包装器:

标志服务模块:

@Module({
    imports: [
        JwtModule.registerAsync({
            imports: [ConfigModule],
            useFactory: async (configService: ConfigService) => ({
                privateKey: configService.get('PRIVATE_KEY'),
                publicKey: configService.get('PUBLIC_KEY'),
                signOptions: {
                    expiresIn: configService.get('JWT_EXP_TIME_IN_SECONDS'),
                    algorithm: 'RS256',
                },
            }),
            inject: [ConfigService],
        }),
    ],
    providers: [SignService],
    exports: [SignService],
})
export class SignModule {}

最后是SignInterceptor:

@Injectable()
export class SignInterceptor implements NestInterceptor {
    intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
        return next.handle().pipe(map(data => this.sign(data)))
    }

    sign(data) {
        const signed = {
            ...data,
            _signed: 'signedContent',
        }

        return signed
    }
}

SignService 工作正常,我使用它。我想将其用作拦截器如何将 SignService 注入到 SignInterceptor 中,以便可以使用它提供的功能?

4

1 回答 1

1

我认为这SignInterceptor是以下内容的一部分ApiModule

@Module({
  imports: [SignModule], // Import the SignModule into the ApiModule.
  controllers: [UsersController],
  providers: [SignInterceptor],
})
export class ApiModule {}

然后SignService注入SignInterceptor

@Injectable()
export class SignInterceptor implements NestInterceptor {
  constructor(private signService: SignService) {}

  //...
}

因为您@UseInterceptors(SignInterceptor)在控制器中使用了拦截器,所以 Nestjs 将为您实例化SignInterceptor并处理依赖项的注入。

于 2020-08-27T15:05:34.820 回答