# CadLabel Backend

Spring Boot backend skeleton for CadLabel.

## Stack

- Java 21
- Spring Boot 3.4.4
- Maven
- MyBatis-Plus
- MySQL
- Tencent Cloud COS SDK

This project intentionally does not include Spring Security, JWT, login APIs, or user-system code.

## Run

```bash
mvn test
mvn spring-boot:run
```

The default profile is `dev`. Configure these environment variables before starting against a real database and COS bucket:

```bash
export APP_DB_URL='jdbc:mysql://localhost:3306/cadlabel?useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai&createDatabaseIfNotExist=true'
export APP_DB_USERNAME='root'
export APP_DB_PASSWORD=''

export APP_COS_SECRET_ID=''
export APP_COS_SECRET_KEY=''
export APP_COS_BUCKET=''
export APP_COS_REGION='ap-beijing'
export APP_COS_PUBLIC_BASE_URL=''
```

## COS APIs

- `POST /api/cos/upload-sessions` issues temporary STS credentials for direct browser upload.
- `POST /api/cos/objects` accepts multipart file upload and stores the file through the backend.

Both endpoints return the standard `ApiResponse<T>` shape.