741 lines
19 KiB
Markdown
741 lines
19 KiB
Markdown
# NanoClaw 后端设计文档
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## 架构概览
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```mermaid
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graph TB
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subgraph Frontend[前端]
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UI[Vue 3 UI]
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end
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subgraph Backend[后端]
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API[Flask Routes]
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SVC[Services]
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TOOLS[Tool System]
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DB[(Database)]
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end
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subgraph External[外部服务]
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LLM[LLM API]
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WEB[Web Resources]
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end
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UI -->|REST/SSE| API
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API --> SVC
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API --> TOOLS
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SVC --> LLM
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TOOLS --> WEB
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SVC --> DB
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TOOLS --> DB
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```
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---
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## 项目结构
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```
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backend/
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├── __init__.py # 应用工厂，数据库初始化
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├── models.py # SQLAlchemy 模型
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├── run.py # 入口文件
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├── config.py # 配置加载器
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│
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├── routes/ # API 路由
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│ ├── __init__.py
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│ ├── conversations.py # 会话 CRUD
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│ ├── messages.py # 消息 CRUD + 聊天
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│ ├── models.py # 模型列表
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│ ├── projects.py # 项目管理
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│ ├── stats.py # Token 统计
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│ └── tools.py # 工具列表
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│
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├── services/ # 业务逻辑
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│ ├── __init__.py
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│ ├── chat.py # 聊天补全服务
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│ └── glm_client.py # GLM API 客户端
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│
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├── tools/ # 工具系统
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│ ├── __init__.py
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│ ├── core.py # 核心类
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│ ├── factory.py # 工具装饰器
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│ ├── executor.py # 工具执行器
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│ ├── services.py # 辅助服务
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│ └── builtin/ # 内置工具
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│ ├── crawler.py # 网页搜索、抓取
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│ ├── data.py # 计算器、文本、JSON
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│ ├── weather.py # 天气查询
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│ ├── file_ops.py # 文件操作（project_id 自动注入）
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│ └── code.py # 代码执行
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│
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├── utils/ # 辅助函数
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│ ├── __init__.py
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│ ├── helpers.py # 通用函数
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│ └── workspace.py # 工作目录工具
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│
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└── migrations/ # 数据库迁移
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└── add_project_support.py
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```
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---
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## 类图
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### 核心数据模型
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```mermaid
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classDiagram
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direction TB
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class User {
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+Integer id
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+String username
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+String password
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+String phone
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+relationship conversations
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+relationship projects
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}
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class Project {
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+String id
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+Integer user_id
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+String name
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+String path
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+String description
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+DateTime created_at
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+DateTime updated_at
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+relationship conversations
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}
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class Conversation {
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+String id
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+Integer user_id
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+String project_id
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+String title
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+String model
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+String system_prompt
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+Float temperature
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+Integer max_tokens
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+Boolean thinking_enabled
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+DateTime created_at
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+DateTime updated_at
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+relationship messages
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}
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class Message {
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+String id
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+String conversation_id
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+String role
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+LongText content
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+Integer token_count
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+DateTime created_at
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}
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class TokenUsage {
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+Integer id
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+Integer user_id
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+Date date
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+String model
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+Integer prompt_tokens
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+Integer completion_tokens
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+Integer total_tokens
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+DateTime created_at
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}
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User "1" --> "*" Conversation : 拥有
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User "1" --> "*" Project : 拥有
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Project "1" --> "*" Conversation : 包含
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Conversation "1" --> "*" Message : 包含
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User "1" --> "*" TokenUsage : 消耗
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```
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### Message Content JSON 结构
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`content` 字段统一使用 JSON 格式存储：
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**User 消息：**
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```json
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{
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"text": "用户输入的文本内容",
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"attachments": [
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{"name": "utils.py", "extension": "py", "content": "def hello()..."}
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]
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}
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```
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**Assistant 消息：**
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```json
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{
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"text": "AI 回复的文本内容",
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"thinking": "思考过程（可选）",
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"tool_calls": [
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{
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"id": "call_xxx",
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"type": "function",
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"function": {
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"name": "file_read",
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"arguments": "{\"path\": \"...\"}"
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},
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"result": "{\"content\": \"...\"}",
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"success": true,
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"skipped": false,
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"execution_time": 0.5
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}
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]
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}
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```
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### 服务层
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```mermaid
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classDiagram
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direction TB
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class ChatService {
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-GLMClient glm_client
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-ToolExecutor executor
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+Integer MAX_ITERATIONS
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+stream_response(conv, tools_enabled, project_id) Response
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-_build_tool_calls_json(calls, results) list
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-_process_tool_calls_delta(delta, list) list
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}
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class GLMClient {
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-str api_url
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-str api_key
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+call(model, messages, kwargs) Response
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}
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class ToolExecutor {
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-ToolRegistry registry
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-dict _cache
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-list _call_history
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+process_tool_calls(calls, context) list
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+build_request(messages, model, tools) dict
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+clear_history() void
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}
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ChatService --> GLMClient : 使用
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ChatService --> ToolExecutor : 使用
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```
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### 工具系统
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```mermaid
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classDiagram
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direction TB
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class ToolDefinition {
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<<dataclass>>
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+str name
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+str description
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+dict parameters
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+Callable handler
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+str category
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+to_openai_format() dict
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}
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class ToolRegistry {
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-dict _tools
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+register(ToolDefinition) void
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+get(str name) ToolDefinition?
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+list_all() list~dict~
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+list_by_category(str) list~dict~
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+execute(str name, dict args) dict
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+remove(str name) bool
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+has(str name) bool
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}
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class ToolExecutor {
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-ToolRegistry registry
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-dict _cache
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-list _call_history
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+process_tool_calls(list, dict) list
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+clear_history() void
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}
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class ToolResult {
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<<dataclass>>
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+bool success
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+Any data
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+str? error
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+to_dict() dict
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+ok(Any)$ ToolResult
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+fail(str)$ ToolResult
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}
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ToolRegistry "1" --> "*" ToolDefinition : 管理
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ToolExecutor "1" --> "1" ToolRegistry : 使用
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ToolDefinition ..> ToolResult : 返回
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```
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---
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## 工作目录系统
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### 概述
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工作目录系统为文件操作工具提供安全隔离，确保所有文件操作都在项目目录内执行。
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### 核心函数
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```python
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# backend/utils/workspace.py
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def get_workspace_root() -> Path:
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"""获取工作区根目录"""
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def get_project_path(project_id: str, project_path: str) -> Path:
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"""获取项目绝对路径"""
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def validate_path_in_project(path: str, project_dir: Path) -> Path:
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"""验证路径在项目目录内（核心安全函数）"""
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def create_project_directory(name: str, user_id: int) -> tuple:
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"""创建项目目录"""
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def delete_project_directory(project_path: str) -> bool:
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"""删除项目目录"""
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def copy_folder_to_project(source_path: str, project_dir: Path, project_name: str) -> dict:
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"""复制文件夹到项目目录"""
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```
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### 安全机制
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`validate_path_in_project()` 是核心安全函数：
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```python
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def validate_path_in_project(path: str, project_dir: Path) -> Path:
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p = Path(path)
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# 相对路径转换为绝对路径
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if not p.is_absolute():
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p = project_dir / p
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p = p.resolve()
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# 安全检查：确保路径在项目目录内
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try:
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p.relative_to(project_dir.resolve())
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except ValueError:
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raise ValueError(f"Path '{path}' is outside project directory")
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return p
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```
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即使传入恶意路径，后端也会拒绝：
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```python
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"../../../etc/passwd" # 尝试跳出项目目录 -> ValueError
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"/etc/passwd" # 绝对路径攻击 -> ValueError
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```
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### project_id 自动注入
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工具执行器自动为文件工具注入 `project_id`：
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```python
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# backend/tools/executor.py
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def process_tool_calls(self, tool_calls, context=None):
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for call in tool_calls:
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name = call["function"]["name"]
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args = json.loads(call["function"]["arguments"])
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# 自动注入 project_id
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if context and name.startswith("file_") and "project_id" in context:
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args["project_id"] = context["project_id"]
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result = self.registry.execute(name, args)
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```
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---
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## API 总览
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### 会话管理
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| 方法 | 路径 | 说明 |
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|------|------|------|
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| `POST` | `/api/conversations` | 创建会话（可选 `project_id` 绑定项目） |
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| `GET` | `/api/conversations` | 获取会话列表（可选 `project_id` 筛选，游标分页） |
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| `GET` | `/api/conversations/:id` | 获取会话详情 |
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| `PATCH` | `/api/conversations/:id` | 更新会话（支持修改 `project_id`） |
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| `DELETE` | `/api/conversations/:id` | 删除会话 |
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### 消息管理
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| 方法 | 路径 | 说明 |
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|------|------|------|
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| `GET` | `/api/conversations/:id/messages` | 获取消息列表（游标分页） |
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| `POST` | `/api/conversations/:id/messages` | 发送消息（SSE 流式） |
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| `DELETE` | `/api/conversations/:id/messages/:mid` | 删除消息 |
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| `POST` | `/api/conversations/:id/regenerate/:mid` | 重新生成消息 |
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### 项目管理
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| 方法 | 路径 | 说明 |
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|------|------|------|
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| `GET` | `/api/projects` | 获取项目列表 |
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| `POST` | `/api/projects` | 创建项目 |
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| `GET` | `/api/projects/:id` | 获取项目详情 |
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| `PUT` | `/api/projects/:id` | 更新项目 |
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| `DELETE` | `/api/projects/:id` | 删除项目 |
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| `POST` | `/api/projects/upload` | 上传文件夹作为项目 |
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| `GET` | `/api/projects/:id/files` | 列出项目文件 |
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### 其他
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| 方法 | 路径 | 说明 |
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|------|------|------|
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| `GET` | `/api/models` | 获取模型列表 |
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| `GET` | `/api/tools` | 获取工具列表 |
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| `GET` | `/api/stats/tokens` | Token 使用统计 |
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---
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## SSE 事件
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| 事件 | 说明 |
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|------|------|
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| `thinking_start` | 新一轮思考开始，前端应清空之前的思考缓冲 |
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| `thinking` | 思维链增量内容（启用时） |
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| `message` | 回复内容的增量片段 |
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| `tool_calls` | 工具调用信息 |
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| `tool_result` | 工具执行结果 |
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| `process_step` | 处理步骤（按顺序：thinking/text/tool_call/tool_result），支持穿插显示 |
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| `error` | 错误信息 |
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| `done` | 回复结束，携带 message_id 和 token_count |
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### process_step 事件格式
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```json
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// 思考过程
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{"index": 0, "type": "thinking", "content": "完整思考内容..."}
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// 回复文本（可穿插在任意步骤之间）
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{"index": 1, "type": "text", "content": "回复文本内容..."}
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// 工具调用
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{"index": 2, "type": "tool_call", "id": "call_abc123", "name": "web_search", "arguments": "{\"query\": \"...\"}"}
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// 工具返回
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{"index": 3, "type": "tool_result", "id": "call_abc123", "name": "web_search", "content": "{\"success\": true, ...}", "skipped": false}
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```
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字段说明：
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- `index`: 步骤序号，确保按正确顺序显示
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- `type`: 步骤类型（thinking/tool_call/tool_result）
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- `id`: 工具调用唯一标识，用于匹配工具调用和返回结果
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- `name`: 工具名称
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- `content`: 内容或结果
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- `skipped`: 工具是否被跳过（失败后跳过）
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---
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## 数据模型
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### User（用户）
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| 字段 | 类型 | 说明 |
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|------|------|------|
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| `id` | Integer | 自增主键 |
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| `username` | String(50) | 用户名（唯一） |
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| `password` | String(255) | 密码（可为空，支持第三方登录） |
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| `phone` | String(20) | 手机号 |
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### Project（项目）
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| 字段 | 类型 | 说明 |
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|------|------|------|
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| `id` | String(64) | UUID 主键 |
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| `user_id` | Integer | 外键关联 User |
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| `name` | String(255) | 项目名称（用户内唯一） |
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| `path` | String(512) | 相对路径（如 user_1/my_project） |
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| `description` | Text | 项目描述 |
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| `created_at` | DateTime | 创建时间 |
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| `updated_at` | DateTime | 更新时间 |
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### Conversation（会话）
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| 字段 | 类型 | 默认值 | 说明 |
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|------|------|--------|------|
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| `id` | String(64) | UUID | 主键 |
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| `user_id` | Integer | - | 外键关联 User |
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| `project_id` | String(64) | null | 外键关联 Project（可选） |
|
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| `title` | String(255) | "" | 会话标题 |
|
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| `model` | String(64) | "glm-5" | 模型名称 |
|
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| `system_prompt` | Text | "" | 系统提示词 |
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| `temperature` | Float | 1.0 | 采样温度 |
|
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| `max_tokens` | Integer | 65536 | 最大输出 token |
|
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| `thinking_enabled` | Boolean | False | 是否启用思维链 |
|
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| `created_at` | DateTime | now | 创建时间 |
|
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| `updated_at` | DateTime | now | 更新时间 |
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|
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### Message（消息）
|
||
|
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| 字段 | 类型 | 说明 |
|
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|------|------|------|
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||
| `id` | String(64) | UUID 主键 |
|
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| `conversation_id` | String(64) | 外键关联 Conversation |
|
||
| `role` | String(16) | user/assistant/system/tool |
|
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| `content` | LongText | JSON 格式内容（见上方结构说明） |
|
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| `token_count` | Integer | Token 数量 |
|
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| `created_at` | DateTime | 创建时间 |
|
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|
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### TokenUsage（Token 使用统计）
|
||
|
||
| 字段 | 类型 | 说明 |
|
||
|------|------|------|
|
||
| `id` | Integer | 自增主键 |
|
||
| `user_id` | Integer | 外键关联 User |
|
||
| `date` | Date | 统计日期 |
|
||
| `model` | String(64) | 模型名称 |
|
||
| `prompt_tokens` | Integer | 输入 token |
|
||
| `completion_tokens` | Integer | 输出 token |
|
||
| `total_tokens` | Integer | 总 token |
|
||
| `created_at` | DateTime | 创建时间 |
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---
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|
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## 分页机制
|
||
|
||
所有列表接口使用**游标分页**：
|
||
|
||
```
|
||
GET /api/conversations?limit=20&cursor=conv_abc123
|
||
```
|
||
|
||
响应：
|
||
```json
|
||
{
|
||
"code": 0,
|
||
"data": {
|
||
"items": [...],
|
||
"next_cursor": "conv_def456",
|
||
"has_more": true
|
||
}
|
||
}
|
||
```
|
||
|
||
- `limit`：每页数量（会话默认 20，消息默认 50，最大 100）
|
||
- `cursor`：上一页最后一条的 ID
|
||
|
||
---
|
||
|
||
## 错误码
|
||
|
||
| Code | 说明 |
|
||
|------|------|
|
||
| `0` | 成功 |
|
||
| `400` | 请求参数错误 |
|
||
| `404` | 资源不存在 |
|
||
| `500` | 服务器错误 |
|
||
|
||
错误响应：
|
||
```json
|
||
{
|
||
"code": 404,
|
||
"message": "conversation not found"
|
||
}
|
||
```
|
||
|
||
---
|
||
|
||
## 项目-对话关联机制
|
||
|
||
### 设计目标
|
||
|
||
将项目（Project）和对话（Conversation）建立**持久绑定关系**，实现：
|
||
1. 创建对话时自动绑定当前选中的项目
|
||
2. 对话列表支持按项目筛选/分组
|
||
3. 工具执行自动使用对话所属项目的上下文，无需 AI 每次询问 `project_id`
|
||
4. 支持对话在项目间迁移
|
||
|
||
### 数据模型（已存在）
|
||
|
||
```mermaid
|
||
erDiagram
|
||
Project ||--o{ Conversation : "包含"
|
||
Conversation {
|
||
string id PK
|
||
int user_id FK
|
||
string project_id FK " nullable, 可选绑定项目"
|
||
string title
|
||
}
|
||
Project {
|
||
string id PK
|
||
int user_id FK
|
||
string name
|
||
}
|
||
```
|
||
|
||
`Conversation.project_id` 是 nullable 的外键：
|
||
- `null` = 未绑定项目（通用对话，文件工具不可用）
|
||
- 非 null = 绑定到特定项目（工具自动使用该项目的工作空间）
|
||
|
||
### API 设计
|
||
|
||
#### 创建对话 `POST /api/conversations`
|
||
|
||
```json
|
||
// Request
|
||
{
|
||
"title": "新对话",
|
||
"project_id": "uuid-of-project" // 可选，传入则绑定项目
|
||
}
|
||
|
||
// Response
|
||
{
|
||
"code": 0,
|
||
"data": {
|
||
"id": "conv-uuid",
|
||
"project_id": "uuid-of-project", // 回显绑定
|
||
"project_name": "AlgoLab", // 附带项目名称，方便前端显示
|
||
"title": "新对话",
|
||
...
|
||
}
|
||
}
|
||
```
|
||
|
||
#### 对话列表 `GET /api/conversations`
|
||
|
||
支持按项目筛选：
|
||
|
||
```
|
||
GET /api/conversations?project_id=xxx # 仅返回该项目的对话
|
||
GET /api/conversations # 返回所有对话（当前行为）
|
||
```
|
||
|
||
响应中附带项目信息：
|
||
|
||
```json
|
||
{
|
||
"code": 0,
|
||
"data": {
|
||
"items": [
|
||
{
|
||
"id": "conv-1",
|
||
"project_id": "proj-1",
|
||
"project_name": "AlgoLab",
|
||
"title": "分析数据",
|
||
...
|
||
},
|
||
{
|
||
"id": "conv-2",
|
||
"project_id": null,
|
||
"project_name": null,
|
||
"title": "闲聊",
|
||
...
|
||
}
|
||
]
|
||
}
|
||
}
|
||
```
|
||
|
||
#### 更新对话 `PATCH /api/conversations/:id`
|
||
|
||
支持修改 `project_id`（迁移对话到其他项目）：
|
||
|
||
```json
|
||
{
|
||
"project_id": "new-project-uuid" // 设为 null 可解绑
|
||
}
|
||
```
|
||
|
||
#### 发送消息 `POST /api/conversations/:id/messages`
|
||
|
||
`project_id` 优先级：
|
||
1. 请求体中的 `project_id`（前端显式传递）
|
||
2. `conversation.project_id`（对话绑定的项目，自动回退）
|
||
3. `null`（无项目上下文，文件工具报错提示）
|
||
|
||
```python
|
||
# 伪代码
|
||
effective_project_id = request_project_id or conv.project_id
|
||
context = {"project_id": effective_project_id} if effective_project_id else None
|
||
```
|
||
|
||
这样 AI **不需要**知道 `project_id`，后端会自动注入。建议将 `project_id` 从文件工具的 `required` 参数列表中移除，改为后端自动注入。
|
||
|
||
### 工具上下文自动注入（已实施）
|
||
|
||
`project_id` 已从所有文件工具的 `required` 参数列表中移除，改为后端自动注入。
|
||
|
||
**实施细节：**
|
||
|
||
1. **工具 Schema**：`file_*` 工具不再声明 `project_id` 参数，AI 不会看到也不会询问
|
||
2. **自动注入**：`ToolExecutor` 在执行文件工具时自动从 context 注入 `project_id`
|
||
3. **Context 构建**：`ChatService` 根据请求或对话绑定自动构建 `context = {"project_id": ...}`
|
||
|
||
```python
|
||
# 工具定义 - 不再声明 project_id
|
||
parameters = {
|
||
"properties": {
|
||
"path": {"type": "string", "description": "文件路径"},
|
||
"pattern": {"type": "string", "description": "过滤模式", "default": "*"}
|
||
},
|
||
"required": [] # 所有参数有默认值，project_id 完全透明
|
||
}
|
||
|
||
# ToolExecutor 自动注入（已有逻辑）
|
||
if name.startswith("file_") and context and "project_id" in context:
|
||
args["project_id"] = context["project_id"]
|
||
```
|
||
|
||
### UI 交互设计
|
||
|
||
#### 侧边栏布局
|
||
|
||
```
|
||
┌─────────────────────┐
|
||
│ [📁 AlgoLab ▼] │ ← 项目选择器
|
||
├─────────────────────┤
|
||
│ [+ 新对话] │
|
||
├─────────────────────┤
|
||
│ 📎 分析数据 3条 │ ← 属于当前项目的对话
|
||
│ 📎 优化算法 5条 │
|
||
│ 📎 调试测试 2条 │
|
||
├─────────────────────┤
|
||
│ 选择其他项目查看对话 │ ← 或切换项目
|
||
└─────────────────────┘
|
||
```
|
||
|
||
**交互规则：**
|
||
1. 顶部项目选择器决定**当前工作空间**
|
||
2. 选中项目后，对话列表**仅显示该项目的对话**
|
||
3. 创建新对话时**自动绑定**当前项目
|
||
4. 未选中项目时显示全部对话
|
||
5. 切换项目不切换当前对话（保持对话焦点）
|
||
|
||
#### 对话项显示
|
||
|
||
- 对话标题前显示小圆点颜色，区分所属项目（可选）
|
||
- 悬浮/详情中显示所属项目名称
|
||
|
||
---
|
||
|
||
## 配置文件
|
||
|
||
配置文件：`config.yml`
|
||
|
||
```yaml
|
||
# 服务端口
|
||
backend_port: 3000
|
||
frontend_port: 4000
|
||
|
||
# LLM API
|
||
api_key: your-api-key
|
||
api_url: https://open.bigmodel.cn/api/paas/v4/chat/completions
|
||
|
||
# 工作区根目录
|
||
workspace_root: ./workspaces
|
||
|
||
# 数据库
|
||
db_type: mysql # mysql, sqlite, postgresql
|
||
db_host: localhost
|
||
db_port: 3306
|
||
db_user: root
|
||
db_password: ""
|
||
db_name: nano_claw
|
||
db_sqlite_file: app.db # SQLite 时使用
|
||
``` |