deepdata: core product code (backend, frontend, runtime, deepflow module)

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# API Gateway
## 概述
API Gateway 是 DeepData 的统一入口,基于 Spring Cloud Gateway 实现,负责路由转发、JWT 认证和限流。
## 架构
```
backend/api-gateway/
├── src/main/java/com/deepdata/gateway/
│ ├── config/ # Gateway 配置
│ ├── filter/ # JWT 认证过滤器
│ └── route/ # 路由定义
└── src/main/resources/
└── application.yml # Gateway 配置
```
## 配置
### 端口
- **默认**: 8080
- **Nacos 发现端口**: 30000
### 关键配置
```yaml
spring:
application:
name: deepdata-gateway
cloud:
nacos:
discovery:
port: 30000
server-addr: ${NACOS_ADDR}
username: consul
password:
deepdata:
jwt:
secret: ${JWT_SECRET}
expiration-seconds: 3600
```
## 功能
### 1. 路由转发
- 将前端请求转发到对应的后端服务
- 支持负载均衡
- 路径重写
### 2. JWT 认证
- 基于 JWT Token 的认证
- Token 验证和过期检查
- 用户上下文传递
### 3. 限流
- (如配置)请求频率限制
- 防止 API 滥用
## 快速开始
### 前置条件
- JDK 21+
- Maven 3.8+
- Nacos 服务(如果使用服务发现)
### 构建
```bash
cd backend/api-gateway
mvn clean install
```
### 运行
```bash
cd backend/api-gateway
mvn spring-boot:run
```
## 开发
### 添加新路由
在 `application.yml` 或通过 Nacos 配置路由规则:
```yaml
spring:
cloud:
gateway:
routes:
- id: data-management
uri: lb://data-management-service
predicates:
- Path=/api/data-management/**
filters:
- StripPrefix=3
```
### 添加自定义过滤器
创建 `GlobalFilter` 或 `GatewayFilter`:
```java
@Component
public class AuthFilter implements GlobalFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
// 过滤逻辑
return chain.filter(exchange);
}
}
```
## 测试
### 测试路由转发
```bash
curl http://localhost:8080/api/data-management/datasets
```
### 测试 JWT 认证
```bash
curl -H "Authorization: Bearer <token>" http://localhost:8080/api/protected-endpoint
```
## 文档
- **Spring Cloud Gateway 文档**: https://docs.spring.io/spring-cloud-gateway/
- **Nacos 发现**: https://nacos.io/
## 相关链接
- [后端 README](../README.md)
- [主应用 README](../services/main-application/README.md)