refactor: flask后端改为异步fastapi

requirements.txt

@@ -10,11 +10,14 @@ scipy==1.15.1
 akshare==1.16.22
 tqdm==4.67.1
 
+# Web框架与异步处理
+fastapi==0.115.11
+uvicorn[standard]==0.34.0
+pydantic==2.10.6
+httpx==0.28.1
 
-# 网络和API请求
-requests==2.32.3
+# 环境配置
 python-dotenv==1.0.1
-flask==3.1.0
 
 # 日志和系统工具
 loguru==0.7.2

utils/api_control.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+# -*- encoding: utf-8 -*-
+
+from typing import Optional, Any
+from fastapi import Response
+from pydantic import BaseModel
+
+
+class ResponseModel(BaseModel):
+    """
+    统一返回模型
+    """
+    code: int = 200
+    msg: str = "Success"
+    data: Optional[Any] = None
+
+
+class ApiResponse:
+    @staticmethod
+    def __response(code: int, msg: str, data: Optional[Any] = None) -> ResponseModel:
+        return ResponseModel(code=code, msg=msg, data=data)
+    
+    @classmethod
+    def success(cls, *, code: int = 200, msg: str = 'Success', data: Optional[Any] = None) -> Response:
+        response_model = cls.__response(code=code, msg=msg, data=data)
+        return cls(content=response_model.model_dump())
+    
+    @classmethod
+    def fail(cls, *, code: int = 400, msg: str = 'Bad Request', data: Optional[Any] = None) -> Response:
+        response_model = cls.__response(code=code, msg=msg, data=data)
+        return cls(content=response_model.model_dump())
+    
+response_api = ApiResponse()
+
+""" 示例
+@app.get("/example-success")
+async def example_success():
+    return response_api.success(data={"key": "value"})
+
+@app.get("/example-fail")
+async def example_fail():
+    return response_api.fail(msg="Something went wrong", data={"error": "details"})
+"""

web_server.py

@@ -1,51 +1,80 @@
-from flask import Flask, render_template, request, jsonify, Response, stream_with_context, send_from_directory
+from fastapi import FastAPI, Request, Response, Depends, HTTPException, BackgroundTasks
+from fastapi.responses import JSONResponse, StreamingResponse, FileResponse, RedirectResponse
+from fastapi.staticfiles import StaticFiles
+from fastapi.middleware.cors import CORSMiddleware
+from pydantic import BaseModel, Field
+from typing import List, Optional, Generator
 from stock_analyzer import StockAnalyzer
 from us_stock_service import USStockService
-from fund_service import FundService  # 新增导入
+from fund_service import FundService
+import asyncio
 import threading
 import os
 import traceback
-import requests
+import httpx
 from logger import get_logger
 from utils.api_utils import APIUtils
 # 加载环境变量
 from dotenv import load_dotenv
+import uvicorn
 
 load_dotenv()
 
 # 获取日志器
 logger = get_logger()
 
-app = Flask(__name__, 
-            static_folder='frontend/dist', 
-            static_url_path='/')
+app = FastAPI(
+    title="Stock Scanner API",
+    description="股票分析API",
+    version="1.0.0"
+)
+
+# 添加CORS中间件
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # 开发环境允许所有来源，生产环境应该限制
+    allow_credentials=True,
+    allow_methods=["*"],    
+    allow_headers=["*"],
+)
+
+# 设置静态文件
+frontend_dist = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'frontend', 'dist')
+if os.path.exists(frontend_dist):
+    app.mount("/", StaticFiles(directory=frontend_dist, html=True), name="frontend")
 
 analyzer = StockAnalyzer()
 us_stock_service = USStockService()
-fund_service = FundService()  # 新增服务实例
+fund_service = FundService()
 
-@app.route('/')
-def index():
+# 定义请求和响应模型
+class AnalyzeRequest(BaseModel):
+    stock_codes: List[str]
+    market_type: str = "A"
+    api_url: Optional[str] = None
+    api_key: Optional[str] = None
+    api_model: Optional[str] = None
+    api_timeout: Optional[str] = None
+
+class TestAPIRequest(BaseModel):
+    api_url: str
+    api_key: str
+    api_model: Optional[str] = None
+    api_timeout: Optional[int] = 10
+
+@app.get("/")
+async def index(request: Request):
     # 检查是否使用前端构建版本
-    frontend_dist = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'frontend', 'dist')
     if os.path.exists(frontend_dist):
-        return send_from_directory(frontend_dist, 'index.html')
+        index_file = os.path.join(frontend_dist, 'index.html')
+        return FileResponse(index_file)
     else:
-        # 传统模板渲染，用于兼容旧版本
-        announcement = os.getenv('ANNOUNCEMENT_TEXT') or None
-        # 获取默认API配置信息
-        default_api_url = os.getenv('API_URL', '')
-        default_api_model = os.getenv('API_MODEL', 'gpt-3.5-turbo')
-        default_api_timeout = os.getenv('API_TIMEOUT', '60')
-        # 不传递API_KEY到前端，出于安全考虑
-        return render_template('index.html', 
-                            announcement=announcement,
-                            default_api_url=default_api_url,
-                            default_api_model=default_api_model,
-                            default_api_timeout=default_api_timeout)
+        # 不再使用模板渲染，而是重定向到API文档页面
+        logger.warning("前端构建目录不存在，重定向到API文档页面")
+        return RedirectResponse(url="/docs")
 
-@app.route('/config')
-def get_config():
+@app.get("/config")
+async def get_config():
     """返回系统配置信息"""
     config = {
         'announcement': os.getenv('ANNOUNCEMENT_TEXT') or '',
@@ -53,23 +82,22 @@ def get_config():
         'default_api_model': os.getenv('API_MODEL', 'gpt-3.5-turbo'),
         'default_api_timeout': os.getenv('API_TIMEOUT', '60')
     }
-    return jsonify(config)
+    return config
 
-@app.route('/analyze', methods=['POST'])
-def analyze():
+@app.post("/analyze")
+async def analyze(request: AnalyzeRequest):
     try:
         logger.info("开始处理分析请求")
-        data = request.json
-        stock_codes = data.get('stock_codes', [])
-        market_type = data.get('market_type', 'A') 
+        stock_codes = request.stock_codes
+        market_type = request.market_type
         
         logger.debug(f"接收到分析请求: stock_codes={stock_codes}, market_type={market_type}")
         
         # 获取自定义API配置
-        custom_api_url = data.get('api_url')
-        custom_api_key = data.get('api_key')
-        custom_api_model = data.get('api_model')
-        custom_api_timeout = data.get('api_timeout')
+        custom_api_url = request.api_url
+        custom_api_key = request.api_key
+        custom_api_model = request.api_model
+        custom_api_timeout = request.api_timeout
         
         logger.debug(f"自定义API配置: URL={custom_api_url}, 模型={custom_api_model}, API Key={'已提供' if custom_api_key else '未提供'}, Timeout={custom_api_timeout}")
         
@@ -83,10 +111,10 @@ def analyze():
         
         if not stock_codes:
             logger.warning("未提供股票代码")
-            return jsonify({'error': '请输入代码'}), 400
+            raise HTTPException(status_code=400, detail="请输入代码")
         
-        # 使用流式响应
-        def generate():
+        # 定义流式生成器
+        async def generate_stream():
             if len(stock_codes) == 1:
                 # 单个股票分析流式处理
                 stock_code = stock_codes[0].strip()
@@ -97,7 +125,16 @@ def analyze():
                 
                 logger.debug(f"开始处理股票 {stock_code} 的流式响应")
                 chunk_count = 0
-                for chunk in custom_analyzer.analyze_stock(stock_code, market_type, stream=True):
+                
+                # 使用线程池执行同步分析
+                def run_analysis():
+                    return list(custom_analyzer.analyze_stock(stock_code, market_type, stream=True))
+                
+                # 在线程中执行同步操作
+                loop = asyncio.get_event_loop()
+                chunks = await loop.run_in_executor(None, run_analysis)
+                
+                for chunk in chunks:
                     chunk_count += 1
                     yield chunk + '\n'
                 logger.info(f"股票 {stock_code} 流式分析完成，共发送 {chunk_count} 个块")
@@ -110,114 +147,132 @@ def analyze():
                 
                 logger.debug(f"开始处理批量股票的流式响应")
                 chunk_count = 0
-                for chunk in custom_analyzer.scan_stocks(
-                    [code.strip() for code in stock_codes], 
-                    min_score=0, 
-                    market_type=market_type,
-                    stream=True
-                ):
+                
+                # 使用线程池执行同步分析
+                def run_batch_analysis():
+                    return list(custom_analyzer.scan_stocks(
+                        [code.strip() for code in stock_codes], 
+                        min_score=0, 
+                        market_type=market_type,
+                        stream=True
+                    ))
+                
+                # 在线程中执行同步操作
+                loop = asyncio.get_event_loop()
+                chunks = await loop.run_in_executor(None, run_batch_analysis)
+                
+                for chunk in chunks:
                     chunk_count += 1
                     yield chunk + '\n'
                 logger.info(f"批量流式分析完成，共发送 {chunk_count} 个块")
         
         logger.info("成功创建流式响应生成器")
-        return Response(stream_with_context(generate()), mimetype='application/json')
+        return StreamingResponse(generate_stream(), media_type='application/json')
             
     except Exception as e:
         error_msg = f"分析时出错: {str(e)}"
         logger.error(error_msg)
         logger.exception(e)
-        return jsonify({'error': error_msg}), 500
+        raise HTTPException(status_code=500, detail=error_msg)
 
-@app.route('/search_us_stocks', methods=['GET'])
-def search_us_stocks():
+@app.get("/search_us_stocks")
+async def search_us_stocks(keyword: str = ""):
     try:
-        keyword = request.args.get('keyword', '')
         if not keyword:
-            return jsonify({'error': '请输入搜索关键词'}), 400
+            raise HTTPException(status_code=400, detail="请输入搜索关键词")
         
-        results = us_stock_service.search_us_stocks(keyword)
-        return jsonify({'results': results})
+        # 在异步上下文中运行同步的搜索函数
+        loop = asyncio.get_event_loop()
+        results = await loop.run_in_executor(None, us_stock_service.search_us_stocks, keyword)
+        return {"results": results}
         
     except Exception as e:
-        print(f"搜索美股代码时出错: {str(e)}")
-        return jsonify({'error': str(e)}), 500
+        logger.error(f"搜索美股代码时出错: {str(e)}")
+        raise HTTPException(status_code=500, detail=str(e))
 
-# 添加基金搜索路由
-@app.route('/search_funds', methods=['GET'])
-def search_funds():
+@app.get("/search_funds")
+async def search_funds(keyword: str = "", market_type: str = ""):
     try:
-        keyword = request.args.get('keyword', '')
-        market_type = request.args.get('market_type', '')
         if not keyword:
-            return jsonify({'error': '请输入搜索关键词'}), 400
+            raise HTTPException(status_code=400, detail="请输入搜索关键词")
         
-        results = fund_service.search_funds(keyword, market_type)
-        return jsonify({'results': results})
+        # 在异步上下文中运行同步的搜索函数
+        loop = asyncio.get_event_loop()
+        results = await loop.run_in_executor(None, lambda: fund_service.search_funds(keyword, market_type))
+        return {"results": results}
         
     except Exception as e:
         logger.error(f"搜索基金代码时出错: {str(e)}")
-        return jsonify({'error': str(e)}), 500
+        raise HTTPException(status_code=500, detail=str(e))
 
-@app.route('/test_api_connection', methods=['POST'])
-def test_api_connection():
+@app.post("/test_api_connection")
+async def test_api_connection(request: TestAPIRequest):
     """测试API连接"""
     try:
         logger.info("开始测试API连接")
-        data = request.json
-        api_url = data.get('api_url')
-        api_key = data.get('api_key')
-        api_model = data.get('api_model')
-        api_timeout = data.get('api_timeout', 10)  # 默认测试连接超时为10秒
+        api_url = request.api_url
+        api_key = request.api_key
+        api_model = request.api_model
+        api_timeout = request.api_timeout
         
         logger.debug(f"测试API连接: URL={api_url}, 模型={api_model}, API Key={'已提供' if api_key else '未提供'}, Timeout={api_timeout}")
         
         if not api_url:
             logger.warning("未提供API URL")
-            return jsonify({'error': '请提供API URL'}), 400
+            raise HTTPException(status_code=400, detail="请提供API URL")
             
         if not api_key:
             logger.warning("未提供API Key")
-            return jsonify({'error': '请提供API Key'}), 400
+            raise HTTPException(status_code=400, detail="请提供API Key")
             
         # 构建API URL
         test_url = APIUtils.format_api_url(api_url)
         logger.debug(f"完整API测试URL: {test_url}")
         
-        # 发送测试请求
-        response = requests.post(
-            test_url,
-            headers={
-                "Authorization": f"Bearer {api_key}",
-                "Content-Type": "application/json"
-            },
-            json={
-                "model": api_model or "gpt-3.5-turbo",
-                "messages": [
-                    {"role": "user", "content": "Hello, this is a test message. Please respond with 'API connection successful'."}
-                ],
-                "max_tokens": 20
-            },
-            timeout=int(api_timeout)
-        )
+        # 使用异步HTTP客户端发送测试请求
+        async with httpx.AsyncClient(timeout=float(api_timeout)) as client:
+            response = await client.post(
+                test_url,
+                headers={
+                    "Authorization": f"Bearer {api_key}",
+                    "Content-Type": "application/json"
+                },
+                json={
+                    "model": api_model or "gpt-3.5-turbo",
+                    "messages": [
+                        {"role": "user", "content": "Hello, this is a test message. Please respond with 'API connection successful'."}
+                    ],
+                    "max_tokens": 20
+                }
+            )
         
         # 检查响应
         if response.status_code == 200:
             logger.info(f"API 连接测试成功: {response.status_code}")
-            return jsonify({'success': True, 'message': 'API 连接测试成功'})
+            return {"success": True, "message": "API 连接测试成功"}
         else:
-            error_message = response.json().get('error', {}).get('message', '未知错误')
+            error_data = response.json()
+            error_message = error_data.get('error', {}).get('message', '未知错误')
             logger.warning(f"API连接测试失败: {response.status_code} - {error_message}")
-            return jsonify({'success': False, 'message': f'API 连接测试失败: {error_message}', 'status_code': response.status_code}), 400
+            return JSONResponse(
+                status_code=400,
+                content={"success": False, "message": f"API 连接测试失败: {error_message}", "status_code": response.status_code}
+            )
             
-    except requests.exceptions.RequestException as e:
+    except httpx.RequestError as e:
         logger.error(f"API 连接请求错误: {str(e)}")
-        return jsonify({'success': False, 'message': f'请求错误: {str(e)}'}), 400
+        return JSONResponse(
+            status_code=400,
+            content={"success": False, "message": f"请求错误: {str(e)}"}
+        )
     except Exception as e:
         logger.error(f"测试 API 连接时出错: {str(e)}")
         logger.exception(e)
-        return jsonify({'success': False, 'message': f'API 测试连接时出错: {str(e)}'}), 500
+        return JSONResponse(
+            status_code=500,
+            content={"success": False, "message": f"API 测试连接时出错: {str(e)}"}
+        )
 
 if __name__ == '__main__':
     logger.info("股票分析系统启动")
-    app.run(host='127.0.0.1', port=8888, debug=True)
+    uvicorn.run("web_server:app", host="127.0.0.1", port=8888, reload=True)