☰ Mục lục series
Tài liệu NestJS tiếng Việt
  1. Nhập môn (Overview)
    1. Giới thiệu
    2. First steps
    3. Controllers
    4. Providers
    5. Modules
    6. Middleware
    7. Exception filters
    8. Pipes
    9. Guards
    10. Interceptors
    11. Custom decorators
  2. Nền tảng (Fundamentals)
    1. Custom providers
    2. Asynchronous providers
    3. Dynamic modules
    4. Injection scopes
    5. Circular dependency
    6. Module reference
    7. Lazy-loading modules
    8. Execution context
    9. Lifecycle events
    10. Discovery service
    11. Platform agnosticism
    12. Testing
  3. Kỹ thuật (Techniques)
    1. Configuration
    2. Database (SQL)
    3. MongoDB
    4. Validation
    5. Caching
    6. Serialization
    7. Versioning
    8. Task scheduling
    9. Queues
    10. Logging
    11. Cookies
    12. Events
    13. Compression
    14. File upload
    15. Streaming files
    16. HTTP module
    17. Session
    18. MVC
    19. Performance (Fastify)
    20. Server-Sent Events
  4. Bảo mật (Security)
    1. Authentication
    2. Authorization
    3. Encryption & Hashing
    4. Helmet
    5. CORS
    6. CSRF
    7. Rate limiting
    8. Vòng đời request
  5. OpenAPI (Swagger)
    1. Introduction
    2. Types and parameters
    3. Operations
    4. Security
    5. Mapped types
    6. Decorators
    7. CLI plugin
    8. Other features
  6. Recipes
    1. REPL
    2. CRUD generator
    3. SWC (fast compiler)
    4. Passport (auth)
    5. Hot reload
    6. MikroORM
    7. Router module
    8. Health checks (Terminus)
    9. CQRS
    10. Prisma
    11. Serve static
    12. Commander
    13. Async local storage
  7. WebSockets
    1. Gateways
    2. Exception filters
    3. Pipes
    4. Guards
    5. Interceptors
    6. Adapters
  8. Microservices
    1. Overview
    2. Redis
    3. MQTT
    4. NATS
    5. RabbitMQ
    6. Kafka
    7. gRPC
    8. Custom transporters
    9. Exception filters
    10. Pipes
    11. Pre-request hooks
    12. Guards
    13. Interceptors
  9. GraphQL
    1. Quick start
    2. Resolvers
    3. Mutations
    4. Subscriptions
    5. Scalars
    6. Directives
    7. Interfaces
    8. Unions and enums
    9. Field middleware
    10. Mapped types
    11. Plugins
    12. Complexity
    13. Extensions
    14. CLI plugin
    15. Generating SDL
    16. Sharing models
    17. Other features
    18. Federation
  10. CLI & triển khai
    1. CLI overview
    2. Workspaces
    3. Libraries
    4. Usage
    5. Scripts
    6. Deployment
    7. Standalone apps
  11. FAQ
    1. Serverless
    2. HTTP adapter
    3. Keep-Alive connections
    4. Global path prefix
    5. Raw body
    6. Hybrid application
    7. HTTPS & multiple servers
    8. Common errors
  12. Phụ lục
    1. Bảng thuật ngữ
WebSockets

Interceptors

Bản dịch từ docs.nestjs.com/websockets/interceptors

Không có sự khác biệt giữa interceptor thông thường và interceptor trong web socket. Ví dụ sau đây sử dụng một interceptor được khởi tạo thủ công ở phạm vi method (method-scoped). Giống như với ứng dụng HTTP, bạn cũng có thể dùng interceptor ở phạm vi gateway (gateway-scoped), tức là thêm decorator @UseInterceptors() vào trước class gateway.

@UseInterceptors(new TransformInterceptor())
@SubscribeMessage('events')
handleEvent(client: Client, data: unknown): WsResponse<unknown> {
  const event = 'events';
  return { event, data };
}
@UseInterceptors(new TransformInterceptor())
@SubscribeMessage('events')
handleEvent(client, data) {
  const event = 'events';
  return { event, data };
}

Nội dung gốc: NestJS Documentation © Kamil Myśliwiec, giấy phép MIT. Bản dịch và ghi chú: Lê Văn Dũng.