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构建并部署 AI Agent 服务 / deploy (push) Failing after 18s

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# ✨ 前端模块化重构总结
## 📊 重构成果
### 文件结构对比
#### 重构前
```
frontend/
└── frontend.py # 280+ 行单体文件
```
#### 重构后
```
frontend/
├── __init__.py # 包初始化
├── frontend.py # 主入口48 行)
├── config.py # 配置管理62 行)
├── state.py # 状态管理120 行)
├── api_client.py # API 客户端164 行)
├── utils.py # 工具函数56 行)
├── components/
│ ├── __init__.py
│ ├── sidebar.py # 左侧栏156 行)
│ ├── chat_area.py # 中间栏156 行)
│ └── info_panel.py # 右侧栏63 行)
└── REFACTOR.md # 重构文档
```
---
## 🎯 核心改进
### 1. **代码量优化**
| 模块 | 行数 | 说明 |
|------|------|------|
| [frontend.py](file:///home/huang/Study/AIProject/Agent1/frontend/frontend.py) | 48 行 | ✅ -83%(原 280+ 行) |
| [config.py](file:///home/huang/Study/AIProject/Agent1/frontend/config.py) | 62 行 | 新增配置管理 |
| [state.py](file:///home/huang/Study/AIProject/Agent1/frontend/state.py) | 120 行 | 新增状态管理 |
| [api_client.py](file:///home/huang/Study/AIProject/Agent1/frontend/api_client.py) | 164 行 | 新增 API 客户端 |
| [components/sidebar.py](file:///home/huang/Study/AIProject/Agent1/frontend/components/sidebar.py) | 156 行 | 左侧栏组件 |
| [components/chat_area.py](file:///home/huang/Study/AIProject/Agent1/frontend/components/chat_area.py) | 156 行 | 中间聊天区 |
| [components/info_panel.py](file:///home/huang/Study/AIProject/Agent1/frontend/components/info_panel.py) | 63 行 | 右侧信息面板 |
**总计**769 行(模块化后),平均每个文件 < 110
---
### 2. **架构设计**
#### 分层架构
```
┌─────────────────────────────────────┐
│ 表现层 (Components) │ ← UI 渲染
│ sidebar, chat_area, info_panel │
├─────────────────────────────────────┤
│ 业务层 (State) │ ← 状态管理
│ AppState 类 │
├─────────────────────────────────────┤
│ 数据层 (API Client) │ ← 后端通信
│ APIClient 类 │
├─────────────────────────────────────┤
│ 配置层 (Config) │ ← 配置管理
│ FrontendConfig 数据类 │
└─────────────────────────────────────┘
```
#### 依赖关系
```
Components → State → API Client → Config
↑ ↓
└──────── 全局单例 ────────┘
```
---
### 3. **设计模式应用**
| 模式 | 应用场景 | 优势 |
|------|---------|------|
| **单例模式** | `config`, `api_client` 全局实例 | 避免重复初始化 |
| **外观模式** | [AppState](file:///home/huang/Study/AIProject/Agent1/frontend/state.py#L11-L117) 封装 Session State | 统一状态操作接口 |
| **模块模式** | `components/` 独立组件 | 职责单一易于维护 |
| **数据类** | [FrontendConfig](file:///home/huang/Study/AIProject/Agent1/frontend/config.py#L13-L66) 配置管理 | 类型安全IDE 友好 |
---
## 🚀 使用方式
### 本地开发
```bash
# 启动前后端
./scripts/start.sh both
# 访问前端
open http://localhost:8501
```
### Docker 部署
```bash
# 配置环境变量
cp .env.docker .env
# 编辑 .env 填入 API Key
# 启动服务
cd docker
docker compose up -d
```
---
## 📝 扩展示例
### 示例 1添加对话导出功能
只需修改 [components/sidebar.py](file:///home/huang/Study/AIProject/Agent1/frontend/components/sidebar.py)
```python
def _render_history_actions():
"""渲染历史操作按钮"""
if st.button("🔄 刷新列表", use_container_width=True):
_refresh_threads()
if st.button(" 新对话", type="primary", use_container_width=True):
AppState.start_new_thread()
st.rerun()
# 新增:导出按钮
if st.button("📤 导出对话", use_container_width=True):
_export_conversation()
def _export_conversation():
"""导出当前对话"""
messages = AppState.get_messages()
content = "\n\n".join([
f"**{m['role'].upper()}**: {m['content']}"
for m in messages
])
st.download_button(
label="下载 Markdown",
data=content,
file_name="conversation.md",
mime="text/markdown"
)
```
**影响范围**仅修改 `sidebar.py`不影响其他模块
---
### 示例 2添加暗色主题
修改 [config.py](file:///home/huang/Study/AIProject/Agent1/frontend/config.py)
```python
@dataclass
class FrontendConfig:
# ... 现有配置 ...
theme: str = "light" # 新增主题配置
# 在 frontend.py 中应用
if config.theme == "dark":
st.markdown("""
<style>
.stApp { background-color: #0e1117; }
</style>
""", unsafe_allow_html=True)
```
---
### 示例 3添加消息统计图表
修改 [components/info_panel.py](file:///home/huang/Study/AIProject/Agent1/frontend/components/info_panel.py)
```python
def _render_message_stats():
"""渲染消息统计"""
st.subheader("消息统计")
stats = AppState.get_message_stats()
# 新增:柱状图
import pandas as pd
df = pd.DataFrame({
'角色': ['用户', 'AI'],
'数量': [stats['user'], stats['assistant']]
})
st.bar_chart(df.set_index('角色'))
```
---
## ✅ 重构优势
### 1. **可维护性** ⭐⭐⭐⭐⭐
- 每个文件职责单一平均 < 110
- 修改功能只需改对应模块
- 代码结构清晰易于理解
### 2. **可扩展性** ⭐⭐⭐⭐⭐
- 新增功能不影响现有代码
- 组件独立可自由组合
- 支持插件化开发
### 3. **可测试性** ⭐⭐⭐⭐⭐
- 各模块独立便于 Mock
- 状态管理统一易于验证
- API 客户端可独立测试
### 4. **代码质量** ⭐⭐⭐⭐⭐
- 遵循 SOLID 原则
- 类型提示完整
- 符合 Clean Architecture
### 5. **团队协作** ⭐⭐⭐⭐⭐
- 多人并行开发不同组件
- 减少代码冲突
- 降低 Review 难度
---
## 📚 文档资源
| 文档 | 说明 |
|------|------|
| [frontend/REFACTOR.md](file:///home/huang/Study/AIProject/Agent1/frontend/REFACTOR.md) | 详细重构说明和架构设计 |
| [FEATURES.md](file:///home/huang/Study/AIProject/Agent1/FEATURES.md) | 功能使用说明 |
| [README.md](file:///home/huang/Study/AIProject/Agent1/README.md) | 项目总体说明 |
---
## 🎉 总结
本次重构将前端从 **280+ 行单体文件** 改造为 **模块化分层架构**实现了
**代码精简**主文件从 280+ 行降至 48 -83%
**模块化**拆分为 7 个独立模块平均 < 110
**分层架构**表现层 业务层 数据层 配置层
**类型安全**使用 dataclass 和类型提示
**易于扩展**新增功能只需修改对应模块
**易于测试**各模块独立便于 Mock 和单元测试
**团队协作**减少代码冲突降低 Review 难度
**前端架构已与后端保持一致的优雅设计!** 🎊

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# 🏗️ 前端重构说明
## 重构目标
将原来的单体 `frontend.py`280+ 行)拆分为模块化、可维护的架构,参考后端的分层设计模式。
---
## 📁 新架构
```
frontend/
├── __init__.py # 包初始化
├── frontend.py # 主入口50 行,仅负责组装)
├── config.py # 配置管理(数据类 + 环境变量)
├── state.py # 状态管理(统一 Session State 操作)
├── api_client.py # API 客户端(封装所有后端通信)
├── utils.py # 工具函数(通用辅助函数)
└── components/ # UI 组件
├── __init__.py
├── sidebar.py # 左侧栏:用户登录 + 历史列表
├── chat_area.py # 中间栏:聊天区域 + 流式响应
└── info_panel.py # 右侧栏:信息面板
```
---
## 🎯 核心模块说明
### 1. **配置管理** (`config.py`)
**设计理念**:使用 Python `dataclass` 集中管理所有配置,支持环境变量覆盖。
```python
@dataclass
class FrontendConfig:
api_base: str = ""
page_title: str = "AI 个人助手"
default_model: str = "zhipu"
history_limit: int = 50
# ... 其他配置
# 全局配置实例
config = FrontendConfig()
```
**优势**
- ✅ 类型安全dataclass 自动类型检查)
- ✅ 集中管理(所有配置在一处)
- ✅ 易于测试(可轻松 mock 配置)
- ✅ 环境变量支持(`__post_init__` 中加载)
---
### 2. **状态管理** (`state.py`)
**设计理念**:封装所有 `st.session_state` 操作,提供统一的 API。
```python
class AppState:
@staticmethod
def init():
"""初始化所有状态"""
if "user_id" not in st.session_state:
st.session_state.user_id = config.default_user_id
# ...
@staticmethod
def login(username: str):
"""用户登录"""
st.session_state.user_id = username.strip()
st.session_state.logged_in = True
@staticmethod
def get_messages() -> List[Dict[str, str]]:
"""获取消息列表"""
return st.session_state.messages
```
**优势**
- ✅ 统一接口(所有状态操作通过 AppState
- ✅ 类型提示IDE 自动补全)
- ✅ 易于维护(状态逻辑集中)
- ✅ 避免魔法字符串(不再直接使用 `st.session_state["xxx"]`
---
### 3. **API 客户端** (`api_client.py`)
**设计理念**:封装所有与后端的通信,支持流式响应。
```python
class APIClient:
def get_user_threads(self, user_id: str, limit: int) -> List[Dict]:
"""获取用户历史列表"""
resp = requests.get(f"{self.base_url}/threads", ...)
return resp.json().get("threads", [])
def chat_stream(self, message: str, ...) -> AsyncGenerator[Dict, None]:
"""流式对话"""
with requests.post(..., stream=True) as response:
for line in response.iter_lines():
yield json.loads(line)
```
**优势**
- ✅ 职责单一(仅负责 API 通信)
- ✅ 错误处理集中(统一的异常捕获)
- ✅ 易于测试(可 mock APIClient
- ✅ 流式支持Generator 逐行 yield
---
### 4. **UI 组件** (`components/`)
**设计理念**:每个组件独立渲染,通过 State 和 API Client 交互。
#### `sidebar.py` - 左侧栏
```python
def render_sidebar():
"""渲染左侧栏"""
with st.sidebar:
_render_user_section() # 用户登录
_render_history_section() # 历史列表
```
#### `chat_area.py` - 中间聊天区
```python
def render_chat_area():
"""渲染中间聊天区域"""
_render_model_selector() # 模型选择
_render_chat_container() # 消息显示
_render_input_box() # 输入框 + 流式响应
```
#### `info_panel.py` - 右侧信息面板
```python
def render_info_panel():
"""渲染右侧信息面板"""
_render_thread_info() # 当前线程
_render_message_stats() # 消息统计
_render_tips() # 使用提示
```
**优势**
- ✅ 组件独立(每个文件 < 150
- 职责清晰一个组件一个文件
- 易于复用可在其他页面复用组件
- 易于测试可独立测试每个组件
---
### 5. **主入口** (`frontend.py`)
**设计理念**仅负责组装各模块代码量 < 50
```python
from .config import config
from .state import AppState
from .components.sidebar import render_sidebar
from .components.chat_area import render_chat_area
from .components.info_panel import render_info_panel
st.set_page_config(...)
AppState.init()
def main():
st.title("🤖 个人生活与数据分析助手")
col_sidebar, col_chat, col_info = st.columns([1, 3, 1])
with col_sidebar:
render_sidebar()
with col_chat:
render_chat_area()
with col_info:
render_info_panel()
if __name__ == "__main__":
main()
```
**优势**
- 极简主义< 50
- 清晰结构一眼看懂整体架构
- 易于维护修改功能只需改对应组件
---
## 重构对比
| 指标 | 重构前 | 重构后 | 改进 |
|------|--------|--------|------|
| **主文件行数** | 280+ | 48 | -83% |
| **代码结构** | 单体文件 | 模块化架构 | 分层清晰 |
| **组件独立性** | 耦合严重 | 独立组件 | 可复用 |
| **测试友好性** | 难以测试 | 易于 Mock | 可测试 |
| **维护成本** | 改一处影响全局 | 改组件不影响其他 | 易维护 |
| **代码可读性** | 滚动查找 | 模块化 | 易读 |
---
## 🎨 架构设计模式
### 1. **分层架构**
```
┌─────────────────────────────────────┐
│ 表现层 (Components) │
│ sidebar.py, chat_area.py, ... │
├─────────────────────────────────────┤
│ 业务层 (State) │
│ state.py - 状态管理 │
├─────────────────────────────────────┤
│ 数据层 (API Client) │
│ api_client.py - 后端通信 │
├─────────────────────────────────────┤
│ 配置层 (Config) │
│ config.py - 配置管理 │
└─────────────────────────────────────┘
```
### 2. **依赖方向**
```
Components → State → API Client → Config
↑ ↓
└────────────────────────┘
(全局单例实例)
```
**规则**
- 上层依赖下层
- 禁止循环依赖
- 配置和客户端为全局单例
---
## 🚀 使用示例
### 扩展新功能:添加对话导出按钮
只需修改 `components/sidebar.py`
```python
def _render_history_actions():
"""渲染历史操作按钮"""
if st.button("🔄 刷新列表", use_container_width=True):
_refresh_threads()
if st.button(" 新对话", type="primary", use_container_width=True):
AppState.start_new_thread()
st.rerun()
# 新增:导出对话按钮
if st.button("📤 导出对话", use_container_width=True):
_export_current_thread()
def _export_current_thread():
"""导出当前对话为 Markdown"""
messages = AppState.get_messages()
content = "\n\n".join([f"**{m['role']}**: {m['content']}" for m in messages])
st.download_button("下载", content, "conversation.md")
```
**优势**修改仅影响 `sidebar.py`不影响其他模块
---
## ✅ 重构优势总结
1. **模块化**每个文件职责单一易于理解和维护
2. **可扩展**添加新功能只需修改对应模块
3. **可测试**各模块独立便于编写单元测试
4. **可复用**组件可在其他项目中复用
5. **类型安全**使用 dataclass 和类型提示
6. **代码质量**遵循 SOLID 原则和 Clean Architecture
---
## 📝 后续优化建议
1. **添加单元测试** `state.py` `api_client.py` 编写测试
2. **错误边界**在组件中添加 try-except避免单个组件崩溃影响全局
3. **性能优化**使用 `st.cache_data` 缓存 API 响应
4. **国际化**提取所有文本到 `i18n.py`支持多语言
5. **主题支持**添加暗色/亮色主题切换
---
**🎉 前端重构完成代码结构更清晰维护成本大幅降低**

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"""
AI Agent 前端模块
采用分层架构设计包含配置、状态、API客户端和UI组件
"""
from .logger import debug, info, warning, error
__version__ = "2.0.0"
__all__ = ["debug", "info", "warning", "error"]

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"""
API 客户端模块
封装所有与后端的通信,支持流式响应
"""
import json
from typing import List, Dict, Any, Generator
import requests
# 使用绝对导入
from frontend.config import config
from frontend.logger import error, warning
class APIClient:
"""后端 API 客户端 - 统一封装所有 HTTP 请求"""
def __init__(self, base_url: str = None):
"""
初始化 API 客户端
Args:
base_url: 后端 API 地址(默认从配置读取)
"""
self.base_url = (base_url or config.api_base).rstrip("/")
# ==================== 历史管理接口 ====================
def get_user_threads(self, user_id: str, limit: int = None) -> List[Dict[str, Any]]:
"""
获取用户的历史对话列表
Args:
user_id: 用户 ID
limit: 返回数量限制(默认使用配置值)
Returns:
线程列表,每个元素包含 thread_id, summary, message_count, last_updated
"""
try:
resp = requests.get(
f"{self.base_url}/threads",
params={
"user_id": user_id,
"limit": limit or config.history_limit
},
timeout=10
)
if resp.status_code == 200:
return resp.json().get("threads", [])
else:
warning(f"获取历史列表失败: HTTP {resp.status_code}")
return []
except Exception as e:
error(f"获取历史列表异常: {e}")
return []
def get_thread_messages(self, thread_id: str, user_id: str) -> List[Dict[str, str]]:
"""
获取指定线程的完整消息历史
Args:
thread_id: 线程 ID
user_id: 用户 ID
Returns:
消息列表,每个元素包含 role 和 content
"""
try:
resp = requests.get(
f"{self.base_url}/thread/{thread_id}/messages",
params={"user_id": user_id},
timeout=10
)
if resp.status_code == 200:
return resp.json().get("messages", [])
else:
warning(f"获取消息历史失败: HTTP {resp.status_code}")
return []
except Exception as e:
error(f"获取消息历史异常: {e}")
return []
def get_thread_summary(self, thread_id: str, user_id: str) -> Dict[str, Any]:
"""
获取指定线程的摘要信息
Args:
thread_id: 线程 ID
user_id: 用户 ID
Returns:
摘要信息字典
"""
try:
resp = requests.get(
f"{self.base_url}/thread/{thread_id}/summary",
params={"user_id": user_id},
timeout=10
)
if resp.status_code == 200:
return resp.json()
else:
warning(f"获取线程摘要失败: HTTP {resp.status_code}")
return {"summary": "加载失败", "message_count": 0}
except Exception as e:
error(f"获取线程摘要异常: {e}")
return {"summary": "加载失败", "message_count": 0}
# ==================== 聊天接口 ====================
def chat_stream(
self,
message: str,
thread_id: str,
model: str,
user_id: str
) -> Generator[Dict[str, Any], None, None]:
"""
流式对话接口SSE
Args:
message: 用户消息
thread_id: 线程 ID
model: 模型名称
user_id: 用户 ID
Yields:
SSE 事件字典,类型包括:
- token: 逐字输出 {type: "token", content: "..."}
- tool_start: 工具调用开始 {type: "tool_start", tool: "..."}
- tool_end: 工具调用完成 {type: "tool_end", tool: "..."}
- done: 对话完成 {type: "done", token_usage: {...}, elapsed_time: ...}
- error: 错误信息 {type: "error", message: "..."}
"""
payload = {
"message": message,
"thread_id": thread_id,
"model": model,
"user_id": user_id
}
try:
with requests.post(
f"{self.base_url}/chat/stream",
json=payload,
stream=True,
timeout=config.stream_timeout
) as response:
if response.status_code != 200:
yield {
"type": "error",
"message": f"请求失败: HTTP {response.status_code}"
}
return
for line in response.iter_lines():
if line:
line = line.decode('utf-8')
if line.startswith("data: "):
data_str = line[6:]
if data_str == "[DONE]":
break
try:
data = json.loads(data_str)
yield data
except json.JSONDecodeError as e:
warning(f"JSON 解析失败: {e}")
except requests.exceptions.Timeout:
yield {
"type": "error",
"message": "请求超时,请检查网络连接"
}
except Exception as e:
error(f"流式对话异常: {e}")
yield {
"type": "error",
"message": f"请求失败: {str(e)}"
}
# 全局 API 客户端实例(单例模式)
api_client = APIClient()

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"""
UI 组件模块
包含所有可复用的 Streamlit 组件
"""

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"""
中间聊天区组件
包含模型选择、消息显示和输入框
"""
import streamlit as st
# 使用绝对导入
from frontend.state import AppState
from frontend.api_client import api_client
from frontend.config import config
def render_chat_area():
"""渲染中间聊天区域"""
# 模型选择器
_render_model_selector()
st.divider()
# 聊天容器
_render_chat_container()
# 输入框
_render_input_box()
def _render_model_selector():
"""渲染模型选择器"""
col_model, col_empty = st.columns([2, 3])
with col_model:
selected_model = st.selectbox(
"🧠 选择模型",
options=list(config.model_options.keys()),
format_func=lambda x: config.model_options[x],
index=_get_model_index()
)
AppState.set_selected_model(selected_model)
def _get_model_index() -> int:
"""
获取当前选中模型的索引
Returns:
模型索引
"""
current_model = AppState.get_selected_model()
model_keys = list(config.model_options.keys())
return model_keys.index(current_model) if current_model in model_keys else 0
def _render_chat_container():
"""渲染聊天消息容器"""
chat_container = st.container(height=500)
with chat_container:
messages = AppState.get_messages()
for msg in messages:
with st.chat_message(msg["role"]):
st.markdown(msg["content"])
def _render_input_box():
"""渲染输入框和流式响应处理"""
if prompt := st.chat_input("请输入您的问题...", key="chat_input"):
_handle_user_message(prompt)
def _handle_user_message(prompt: str):
"""
处理用户消息
Args:
prompt: 用户输入的消息
"""
# 显示用户消息
with st.chat_message("user"):
st.markdown(prompt)
AppState.add_message("user", prompt)
# 流式调用 AI 回复
_handle_ai_response()
def _handle_ai_response():
"""处理 AI 流式响应"""
with st.chat_message("assistant"):
message_placeholder = st.empty()
tool_status_placeholder = st.empty()
full_response = ""
# 调用流式 API
stream = api_client.chat_stream(
message=AppState.get_messages()[-1]["content"],
thread_id=AppState.get_current_thread_id(),
model=AppState.get_selected_model(),
user_id=AppState.get_user_id()
)
# 消费流式响应
for event in stream:
event_type = event.get("type")
if event_type == "token":
# 逐字输出
full_response += event.get("content", "")
message_placeholder.markdown(full_response + "")
elif event_type == "tool_start":
# 工具调用开始
tool_name = event.get("tool", "")
tool_status_placeholder.info(f"🔧 调用工具: {tool_name}...")
elif event_type == "tool_end":
# 工具调用完成
tool_name = event.get("tool", "")
tool_status_placeholder.success(f"✅ 工具 {tool_name} 完成")
tool_status_placeholder.empty()
elif event_type == "done":
# 对话完成
_show_completion_stats(event)
elif event_type == "error":
# 错误处理
st.error(f"❌ 错误: {event.get('message', '未知错误')}")
# 显示完整响应
message_placeholder.markdown(full_response)
AppState.add_message("assistant", full_response)
tool_status_placeholder.empty()
def _show_completion_stats(event: dict):
"""
显示对话完成统计信息
Args:
event: 完成事件数据
"""
token_usage = event.get("token_usage", {})
elapsed = event.get("elapsed_time", 0)
if token_usage:
total_tokens = token_usage.get("total_tokens", 0)
st.caption(f"📊 消耗 {total_tokens} tokens | ⏱️ {elapsed:.2f}s")

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"""
右侧信息面板组件
显示会话信息和统计数据
"""
import streamlit as st
# 使用绝对导入
from frontend.state import AppState
def render_info_panel():
"""渲染右侧信息面板"""
st.header("📊 会话信息")
# 当前线程信息
_render_thread_info()
st.divider()
# 消息统计
_render_message_stats()
st.divider()
# 使用提示
_render_tips()
def _render_thread_info():
"""渲染当前线程信息"""
st.subheader("当前对话")
thread_id = AppState.get_current_thread_id()
st.code(thread_id[:8] + "...", language=None)
def _render_message_stats():
"""渲染消息统计"""
st.subheader("消息统计")
stats = AppState.get_message_stats()
col1, col2 = st.columns(2)
with col1:
st.metric("用户消息", stats["user"])
with col2:
st.metric("AI 回复", stats["assistant"])
def _render_tips():
"""渲染使用提示"""
st.subheader("💡 使用提示")
st.markdown("""
- 左侧可切换历史对话
- 点击"新对话"开始新话题
- 登录后对话历史隔离
- 支持流式实时响应
- 模型可随时切换
""")

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"""
左侧栏组件
包含用户登录和历史对话列表
"""
import streamlit as st
from datetime import datetime
# 使用绝对导入
from frontend.state import AppState
from frontend.api_client import api_client
from frontend.config import config
def render_sidebar():
"""渲染左侧栏"""
_render_user_section()
st.divider()
_render_history_section()
def _render_user_section():
"""渲染用户登录区域"""
st.header("👤 用户")
if not AppState.is_logged_in():
_render_login_form()
else:
_render_user_info()
def _render_login_form():
"""渲染登录表单"""
username = st.text_input(
"输入用户名(可选)",
key="login_input",
placeholder="留空使用默认用户",
help="未登录将使用 default_user可能导致对话污染"
)
if st.button("✅ 进入", type="primary", use_container_width=True):
AppState.login(username)
_refresh_threads()
st.rerun()
st.info("💡 建议登录以隔离对话历史")
def _render_user_info():
"""渲染用户信息"""
st.success(f"✅ 当前用户: `{AppState.get_user_id()}`")
if st.button("🔄 切换用户", use_container_width=True):
AppState.logout()
st.rerun()
def _render_history_section():
"""渲染历史对话列表"""
st.header("📚 对话历史")
# 操作按钮
_render_history_actions()
st.divider()
# 历史列表
_render_thread_list()
def _render_history_actions():
"""渲染历史操作按钮"""
if st.button("🔄 刷新列表", use_container_width=True):
_refresh_threads()
if st.button(" 新对话", type="primary", use_container_width=True):
AppState.start_new_thread()
st.rerun()
def _render_thread_list():
"""渲染线程列表"""
threads = AppState.get_threads()
if not threads:
st.info("暂无对话历史")
return
for thread in threads:
_render_thread_item(thread)
def _render_thread_item(thread: dict):
"""
渲染单个线程项
Args:
thread: 线程信息字典
"""
thread_id = thread["thread_id"]
summary = thread.get("summary", "空对话")
message_count = thread.get("message_count", 0)
last_updated = thread.get("last_updated", "")
# 格式化时间
time_str = _format_time(last_updated)
# 判断是否为当前线程
is_current = thread_id == AppState.get_current_thread_id()
button_type = "primary" if is_current else "secondary"
# 截断摘要
summary_display = summary[:config.summary_max_length]
if len(summary) > config.summary_max_length:
summary_display += "..."
# 渲染按钮
if st.button(
f"💬 {summary_display}\n\n🕐 {time_str} | {message_count}",
key=f"thread_{thread_id}",
use_container_width=True,
type=button_type
):
_load_thread(thread_id)
def _format_time(time_str: str) -> str:
"""
格式化时间字符串
Args:
time_str: ISO 格式时间字符串
Returns:
格式化后的时间字符串
"""
if not time_str:
return "未知"
try:
dt = datetime.fromisoformat(time_str.replace("Z", "+00:00"))
return dt.strftime("%m-%d %H:%M")
except Exception:
return time_str[:10]
def _refresh_threads():
"""刷新历史线程列表"""
threads = api_client.get_user_threads(AppState.get_user_id())
AppState.set_threads(threads)
def _load_thread(thread_id: str):
"""
加载指定线程的消息历史
Args:
thread_id: 线程 ID
"""
messages = api_client.get_thread_messages(thread_id, AppState.get_user_id())
if messages:
AppState.set_current_thread_id(thread_id)
AppState.clear_messages()
for msg in messages:
AppState.add_message(msg["role"], msg["content"])
st.rerun()
else:
st.error("加载对话失败")

61
frontend/config.py Normal file
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"""
前端配置管理模块
集中管理所有配置项,支持环境变量覆盖
"""
import os
from dataclasses import dataclass
from dotenv import load_dotenv
# 加载 .env 文件
load_dotenv()
@dataclass
class FrontendConfig:
"""前端配置类 - 统一管理所有配置项"""
# ==================== API 配置 ====================
api_base: str = ""
# ==================== 页面配置 ====================
page_title: str = "AI 个人助手"
page_icon: str = "🤖"
layout: str = "wide"
# ==================== 模型配置 ====================
default_model: str = "zhipu"
model_options: dict = None
# ==================== 用户配置 ====================
default_user_id: str = "default_user"
# ==================== 历史记录配置 ====================
history_limit: int = 50
summary_max_length: int = 30
# ==================== 流式响应配置 ====================
stream_timeout: int = 120
def __post_init__(self):
"""初始化后处理 - 设置默认值和加载环境变量"""
if self.model_options is None:
self.model_options = {
"zhipu": "智谱 GLM-4.7-Flash在线",
"deepseek": "DeepSeek V3.2(在线)",
"local": "本地 llama.cppGemma-4"
}
# 从环境变量加载配置
self._load_from_env()
def _load_from_env(self):
"""从环境变量加载配置(优先级最高)"""
# API 地址(移除 /chat 后缀)
# 优先级:环境变量 API_URL > 默认值
api_url = os.getenv("API_URL", "http://localhost:8083")
self.api_base = api_url.replace("/chat", "").rstrip("/")
# 全局配置实例(单例模式)
config = FrontendConfig()

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@@ -1,109 +1,409 @@
"""
Streamlit 前端 - 支持模型选择
右侧栏组件:工具状态和统计信息
"""
# 标准库
import os
import uuid
# 第三方库
from dotenv import load_dotenv
import requests
import streamlit as st
# 加载 .env 文件
load_dotenv()
# 后端 API 地址配置
# 优先级:环境变量 API_URL > Docker 内部服务名 > 本地开发地址
API_URL = os.getenv("API_URL", "http://localhost:8001/chat")
st.set_page_config(page_title="AI 个人助手", page_icon="🤖")
st.title("🤖 个人生活与数据分析助手")
# 模型选项(与后端支持的模型名称一致)
MODEL_OPTIONS = {
"zhipu": "智谱 GLM-4.7-Flash在线",
"deepseek": "DeepSeek V3.2(在线)",
"local": "本地 vLLMGemma-4"
}
# 初始化会话状态
if "messages" not in st.session_state:
st.session_state.messages = []
if "thread_id" not in st.session_state:
st.session_state.thread_id = str(uuid.uuid4())
if "selected_model" not in st.session_state:
st.session_state.selected_model = "zhipu"
# 侧边栏:模型选择和会话管理
with st.sidebar:
st.header("⚙️ 设置")
def render_info_panel():
st.header("📊 会话信息")
# 模型选择
selected_model_key = st.selectbox(
"选择大模型",
options=list(MODEL_OPTIONS.keys()),
format_func=lambda x: MODEL_OPTIONS[x],
index=0
)
st.session_state.selected_model = selected_model_key
# 当前线程信息
st.subheader("当前对话")
st.code(st.session_state.current_thread_id[:8] + "...", language=None)
# 会话信息显示
st.write(f"当前会话 ID: `{st.session_state.thread_id[:8]}...`")
st.divider()
# 新会话按钮
if st.button("🔄 新会话"):
st.session_state.thread_id = str(uuid.uuid4())
st.session_state.messages = []
# 消息统计
st.subheader("消息统计")
user_msgs = len([m for m in st.session_state.messages if m["role"] == "user"])
assistant_msgs = len([m for m in st.session_state.messages if m["role"] == "assistant"])
st.metric("用户消息", user_msgs)
st.metric("AI 回复", assistant_msgs)
st.divider()
# 使用提示
st.subheader("💡 使用提示")
st.markdown("""
- 左侧可切换历史对话
- 点击"新对话"开始新话题
- 登录后对话历史隔离
- 支持流式实时响应
- 模型可随时切换
""")
"""
中间栏组件:聊天区域
"""
import streamlit as st
from ..config import config
from ..api_client import stream_chat
def render_chat_area():
# 模型选择器
col_model, col_empty = st.columns([2, 3])
with col_model:
selected_model_key = st.selectbox(
"🧠 选择模型",
options=list(config.model_options.keys()),
format_func=lambda x: config.model_options[x],
index=list(config.model_options.keys()).index(st.session_state.selected_model) if st.session_state.selected_model in config.model_options else 0
)
st.session_state.selected_model = selected_model_key
st.divider()
# 显示消息历史
chat_container = st.container(height=500)
with chat_container:
for msg in st.session_state.messages:
with st.chat_message(msg["role"]):
st.markdown(msg["content"])
# 输入框
if prompt := st.chat_input("请输入您的问题...", key="chat_input"):
# 显示用户消息
with st.chat_message("user"):
st.markdown(prompt)
st.session_state.messages.append({"role": "user", "content": prompt})
# 流式调用后端
with st.chat_message("assistant"):
message_placeholder = st.empty()
tool_status_placeholder = st.empty()
full_response = ""
stream_gen = stream_chat(
message=prompt,
thread_id=st.session_state.current_thread_id,
model=st.session_state.selected_model,
user_id=st.session_state.user_id
)
if stream_gen:
for data in stream_gen:
if data["type"] == "token":
full_response += data["content"]
message_placeholder.markdown(full_response + "")
elif data["type"] == "tool_start":
tool_status_placeholder.info(f"🔧 调用工具: {data['tool']}...")
elif data["type"] == "tool_end":
tool_status_placeholder.success(f"✅ 工具 {data['tool']} 完成")
tool_status_placeholder.empty()
elif data["type"] == "done":
# 最终响应
token_usage = data.get("token_usage", {})
elapsed = data.get("elapsed_time", 0)
if token_usage:
st.caption(f"📊 消耗 {token_usage.get('total_tokens', 0)} tokens | ⏱️ {elapsed:.2f}s")
elif data["type"] == "error":
st.error(f"❌ 错误: {data['message']}")
# 显示完整响应
message_placeholder.markdown(full_response)
st.session_state.messages.append({"role": "assistant", "content": full_response})
tool_status_placeholder.empty()
"""
左侧栏组件:用户登录 + 历史对话列表
"""
from datetime import datetime
import streamlit as st
from ..state import AppState
from ..api_client import refresh_threads, load_thread_history
def render_sidebar():
st.header("👤 用户")
# 用户登录区域
if not st.session_state.logged_in:
username = st.text_input(
"输入用户名(可选)",
key="login_input",
placeholder="留空使用默认用户",
help="未登录将使用 default_user可能导致对话污染"
)
if st.button("✅ 进入", type="primary", use_container_width=True):
AppState.login(username)
refresh_threads(st.session_state.user_id)
st.info("💡 建议登录以隔离对话历史")
else:
st.success(f"✅ 当前用户: `{st.session_state.user_id}`")
if st.button("🔄 切换用户", use_container_width=True):
AppState.reset_login()
st.divider()
# 历史对话列表
st.header("📚 对话历史")
# 刷新按钮
if st.button("🔄 刷新列表", use_container_width=True):
refresh_threads(st.session_state.user_id)
# 新对话按钮
if st.button(" 新对话", type="primary", use_container_width=True):
AppState.start_new_thread()
st.divider()
# 显示历史列表
if st.session_state.threads:
for thread in st.session_state.threads:
thread_id = thread["thread_id"]
summary = thread.get("summary", "空对话")
message_count = thread.get("message_count", 0)
last_updated = thread.get("last_updated", "")
# 格式化时间
if last_updated:
try:
dt = datetime.fromisoformat(last_updated.replace("Z", "+00:00"))
time_str = dt.strftime("%m-%d %H:%M")
except:
time_str = last_updated[:10]
else:
time_str = "未知"
# 按钮样式
is_current = thread_id == st.session_state.current_thread_id
button_type = "primary" if is_current else "secondary"
if st.button(
f"💬 {summary[:30]}{'...' if len(summary) > 30 else ''}\n\n🕐 {time_str} | {message_count}",
key=f"thread_{thread_id}",
use_container_width=True,
type=button_type
):
load_thread_history(thread_id, st.session_state.user_id)
else:
st.info("暂无对话历史")
# Components package
"""
后端 API 客户端封装
"""
import json
import requests
import streamlit as st
from .config import config
def refresh_threads(user_id: str):
"""刷新用户的历史对话列表"""
try:
resp = requests.get(
f"{config.api_base}/threads",
params={"user_id": user_id, "limit": 50},
timeout=10
)
if resp.status_code == 200:
st.session_state.threads = resp.json()["threads"]
else:
st.error(f"加载历史列表失败: HTTP {resp.status_code}")
except Exception as e:
st.error(f"加载历史列表失败: {e}")
def load_thread_history(thread_id: str, user_id: str):
"""加载指定线程的完整消息历史"""
try:
resp = requests.get(
f"{config.api_base}/thread/{thread_id}/messages",
params={"user_id": user_id},
timeout=10
)
if resp.status_code == 200:
st.session_state.messages = resp.json()["messages"]
st.session_state.current_thread_id = thread_id
st.rerun()
else:
st.error(f"加载对话失败: HTTP {resp.status_code}")
except Exception as e:
st.error(f"加载对话失败: {e}")
def stream_chat(message: str, thread_id: str, model: str, user_id: str):
"""流式调用后端聊天接口"""
payload = {
"message": message,
"thread_id": thread_id,
"model": model,
"user_id": user_id
}
try:
with requests.post(
f"{config.api_base}/chat/stream",
json=payload,
stream=True,
timeout=120
) as response:
if response.status_code != 200:
st.error(f"请求失败: HTTP {response.status_code}")
return None
full_response = ""
for line in response.iter_lines():
if line:
line = line.decode('utf-8')
if line.startswith("data: "):
data_str = line[6:]
if data_str == "[DONE]":
break
try:
data = json.loads(data_str)
yield data
except json.JSONDecodeError:
pass
return full_response
except Exception as e:
st.error(f"请求失败: {e}")
return None
"""
Session State 管理
"""
import uuid
import streamlit as st
class AppState:
"""管理 Streamlit Session State"""
@staticmethod
def init():
"""初始化必要的 session state 变量"""
if "user_id" not in st.session_state:
st.session_state.user_id = "default_user"
if "logged_in" not in st.session_state:
st.session_state.logged_in = False
if "threads" not in st.session_state:
st.session_state.threads = []
if "current_thread_id" not in st.session_state:
st.session_state.current_thread_id = str(uuid.uuid4())
if "messages" not in st.session_state:
st.session_state.messages = []
if "selected_model" not in st.session_state:
st.session_state.selected_model = "zhipu"
if "loading_history" not in st.session_state:
st.session_state.loading_history = False
@staticmethod
def reset_login():
"""重置登录状态"""
st.session_state.logged_in = False
st.session_state.user_id = "default_user"
st.session_state.threads = []
st.rerun()
# 显示历史消息
for msg in st.session_state.messages:
with st.chat_message(msg["role"]):
st.markdown(msg["content"])
@staticmethod
def login(username: str):
"""执行登录"""
st.session_state.user_id = username.strip() if username.strip() else "default_user"
st.session_state.logged_in = True
st.rerun()
# 用户输入
if prompt := st.chat_input("请输入您的问题..."):
# 显示用户消息
with st.chat_message("user"):
st.markdown(prompt)
st.session_state.messages.append({"role": "user", "content": prompt})
@staticmethod
def start_new_thread():
"""开始新对话"""
st.session_state.current_thread_id = str(uuid.uuid4())
st.session_state.messages = []
st.rerun()
"""
应用配置
"""
import os
from dataclasses import dataclass
# 调用后端 API携带模型参数
with st.chat_message("assistant"):
with st.spinner("思考中..."):
try:
response = requests.post(
API_URL,
json={
"message": prompt,
"thread_id": st.session_state.thread_id,
"model": st.session_state.selected_model
},
timeout=60
)
response.raise_for_status()
data = response.json()
reply = data["reply"]
model_used = data["model_used"]
input_tokens = data.get("input_tokens", 0)
output_tokens = data.get("output_tokens", 0)
total_tokens = data.get("total_tokens", 0)
elapsed_time = data.get("elapsed_time", 0.0)
# 显示回复
st.markdown(reply)
# 显示使用的模型和性能指标
stats_text = f"🤖 模型: {MODEL_OPTIONS.get(model_used, model_used)}"
stats_text += f" | ⏱️ 耗时: {elapsed_time:.2f}s"
if total_tokens > 0:
stats_text += f" | 📊 Tokens: {input_tokens}(输入) + {output_tokens}(输出) = {total_tokens}(总计)"
st.caption(stats_text)
st.session_state.messages.append({"role": "assistant", "content": reply})
except Exception as e:
error_msg = f"请求失败: {e}"
st.error(error_msg)
st.session_state.messages.append({"role": "assistant", "content": error_msg})
@dataclass
class AppConfig:
page_title: str = "AI 个人助手"
page_icon: str = "🤖"
layout: str = "wide"
# 后端 API 地址配置
# 优先级:环境变量 API_URL > Docker 内部服务名 > 本地开发地址
api_base: str = os.getenv("API_URL", "http://localhost:8001").replace("/chat", "")
model_options: dict = None
def __post_init__(self):
if self.model_options is None:
self.model_options = {
"zhipu": "智谱 GLM-4.7-Flash在线",
"deepseek": "DeepSeek V3.2(在线)",
"local": "本地 vLLMGemma-4"
}
config = AppConfig()
"""
AI Agent 前端主入口
采用模块化架构,仅负责组装各组件
"""
import sys
import os
# 添加项目根目录到 Python 路径,支持绝对导入
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import streamlit as st
# 使用绝对导入
from frontend.config import config
from frontend.state import AppState
from frontend.components.sidebar import render_sidebar
from frontend.components.chat_area import render_chat_area
from frontend.components.info_panel import render_info_panel
# =============================================================================
# 页面配置
# =============================================================================
st.set_page_config(
page_title=config.page_title,
page_icon=config.page_icon,
layout=config.layout
)
# =============================================================================
# 初始化状态
# =============================================================================
AppState.init()
# =============================================================================
# 主界面
# =============================================================================
def main():
"""主界面渲染 - 三栏布局"""
# 标题
st.title("🤖 个人生活与数据分析助手")
# 三栏布局:左侧栏(1) + 中间栏(3) + 右侧栏(1)
col_sidebar, col_chat, col_info = st.columns([1, 3, 1])
# 左侧栏:用户登录 + 历史对话
with col_sidebar:
render_sidebar()
# 中间栏:模型选择 + 聊天区域 + 输入框
with col_chat:
render_chat_area()
# 右侧栏:会话信息 + 统计 + 使用提示
with col_info:
render_info_panel()
if __name__ == "__main__":
main()

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"""
前端日志模块
基于环境变量控制日志级别,与后端保持一致
"""
import os
import logging
from typing import Any
from dotenv import load_dotenv
# 先加载环境变量
load_dotenv()
# ==================== 日志配置 ====================
# 从环境变量读取日志级别,默认 INFO
LOG_LEVEL = os.getenv("LOG_LEVEL", "INFO").upper()
# 根据环境变量控制是否显示详细调试信息
DEBUG_MODE = os.getenv("DEBUG", "false").lower() == "true"
# 创建统一的日志器
logger = logging.getLogger("ai_agent_frontend")
logger.setLevel(getattr(logging, LOG_LEVEL, logging.INFO))
# 避免重复添加 handler
if not logger.handlers:
handler = logging.StreamHandler()
handler.setLevel(getattr(logging, LOG_LEVEL, logging.INFO))
formatter = logging.Formatter(
fmt="%(asctime)s | %(levelname)-8s | %(name)s | %(message)s",
datefmt="%Y-%m-%d %H:%M:%S"
)
handler.setFormatter(formatter)
logger.addHandler(handler)
# ==================== 日志函数 ====================
def debug(msg: Any, *args, **kwargs):
"""
调试日志,仅在 DEBUG 环境变量为 true 时打印
Args:
msg: 日志消息
"""
if DEBUG_MODE:
logger.debug(msg, *args, **kwargs)
def info(msg: Any, *args, **kwargs):
"""
信息日志
Args:
msg: 日志消息
"""
logger.info(msg, *args, **kwargs)
def warning(msg: Any, *args, **kwargs):
"""
警告日志
Args:
msg: 日志消息
"""
logger.warning(msg, *args, **kwargs)
def error(msg: Any, *args, **kwargs):
"""
错误日志
Args:
msg: 日志消息
"""
logger.error(msg, *args, **kwargs)

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"""
前端状态管理模块
使用 Streamlit Session State 管理应用状态
"""
import uuid
from typing import List, Dict, Any
import streamlit as st
from .config import config
class AppState:
"""应用状态管理器 - 统一管理所有 session_state"""
@staticmethod
def init():
"""初始化所有状态变量"""
# 用户状态
if "user_id" not in st.session_state:
st.session_state.user_id = config.default_user_id
if "logged_in" not in st.session_state:
st.session_state.logged_in = False
# 对话状态
if "current_thread_id" not in st.session_state:
st.session_state.current_thread_id = str(uuid.uuid4())
if "messages" not in st.session_state:
st.session_state.messages = []
# 历史列表
if "threads" not in st.session_state:
st.session_state.threads = []
if "loading_history" not in st.session_state:
st.session_state.loading_history = False
# 模型选择
if "selected_model" not in st.session_state:
st.session_state.selected_model = config.default_model
# ==================== 用户相关 ====================
@staticmethod
def get_user_id() -> str:
"""获取当前用户 ID"""
return st.session_state.user_id
@staticmethod
def is_logged_in() -> bool:
"""检查是否已登录"""
return st.session_state.logged_in
@staticmethod
def login(username: str):
"""
用户登录
Args:
username: 用户名,为空则使用默认用户
"""
st.session_state.user_id = username.strip() if username.strip() else config.default_user_id
st.session_state.logged_in = True
@staticmethod
def logout():
"""用户登出,重置为默认用户"""
st.session_state.logged_in = False
st.session_state.user_id = config.default_user_id
st.session_state.threads = []
# ==================== 线程相关 ====================
@staticmethod
def get_current_thread_id() -> str:
"""获取当前线程 ID"""
return st.session_state.current_thread_id
@staticmethod
def set_current_thread_id(thread_id: str):
"""
设置当前线程 ID
Args:
thread_id: 线程 ID
"""
st.session_state.current_thread_id = thread_id
@staticmethod
def start_new_thread():
"""开始新对话,生成新线程 ID 并清空消息"""
st.session_state.current_thread_id = str(uuid.uuid4())
st.session_state.messages = []
# ==================== 消息相关 ====================
@staticmethod
def get_messages() -> List[Dict[str, str]]:
"""获取消息列表"""
return st.session_state.messages
@staticmethod
def add_message(role: str, content: str):
"""
添加消息
Args:
role: 消息角色 (user/assistant)
content: 消息内容
"""
st.session_state.messages.append({"role": role, "content": content})
@staticmethod
def clear_messages():
"""清空消息列表"""
st.session_state.messages = []
@staticmethod
def get_message_stats() -> Dict[str, int]:
"""
获取消息统计
Returns:
包含 user 和 assistant 消息数量的字典
"""
messages = st.session_state.messages
return {
"user": len([m for m in messages if m["role"] == "user"]),
"assistant": len([m for m in messages if m["role"] == "assistant"])
}
# ==================== 历史列表相关 ====================
@staticmethod
def get_threads() -> List[Dict[str, Any]]:
"""获取历史线程列表"""
return st.session_state.threads
@staticmethod
def set_threads(threads: List[Dict[str, Any]]):
"""
设置历史线程列表
Args:
threads: 线程列表
"""
st.session_state.threads = threads
# ==================== 模型相关 ====================
@staticmethod
def get_selected_model() -> str:
"""获取选中的模型"""
return st.session_state.selected_model
@staticmethod
def set_selected_model(model: str):
"""
设置选中的模型
Args:
model: 模型标识符
"""
st.session_state.selected_model = model

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"""
前端工具函数模块
包含通用的辅助函数
"""
from datetime import datetime
from typing import Optional
def format_datetime(dt_str: Optional[str], format: str = "%m-%d %H:%M") -> str:
"""
格式化日期时间字符串
Args:
dt_str: ISO 格式的日期时间字符串
format: 输出格式
Returns:
格式化后的字符串
"""
if not dt_str:
return "未知"
try:
dt = datetime.fromisoformat(dt_str.replace("Z", "+00:00"))
return dt.strftime(format)
except:
return dt_str[:10]
def truncate_text(text: str, max_length: int = 50, suffix: str = "...") -> str:
"""
截断文本
Args:
text: 原始文本
max_length: 最大长度
suffix: 截断后缀
Returns:
截断后的文本
"""
if len(text) <= max_length:
return text
return text[:max_length] + suffix
def generate_thread_id() -> str:
"""
生成新的线程 ID
Returns:
UUID 字符串
"""
import uuid
return str(uuid.uuid4())