aszerW
95c7a091f5
新功能： - /api/v1/ohlcv 接口新增可选 asset_type 参数 - 用于验证code与指定类型是否匹配 - 类型不匹配时返回400错误并说明 API文档更新： - endpoints 添加 asset_type 参数说明 - 新增 asset_types 字段说明各类型含义 使用示例： - /api/v1/ohlcv?code=000300.SH (自动检测) - /api/v1/ohlcv?code=000300.SH&asset_type=china_index (验证类型) - /api/v1/ohlcv?code=513100.SH&asset_type=us_index (类型不匹配报错)
771 lines
24 KiB
Python
771 lines
24 KiB
Python
"""
|
||
Flask 数据服务 API
|
||
==================
|
||
提供 RESTful API 接口，支持获取各类资产的 K 线数据
|
||
|
||
特性:
|
||
- 分层架构：各资产类型独立实现
|
||
- LRU + TTL 双缓存机制
|
||
- SSH隧道支持（港美股）
|
||
- ETF净值获取（计算溢价率）
|
||
|
||
运行:
|
||
python datasource/flask_server.py
|
||
|
||
API 文档:
|
||
GET / - 服务信息
|
||
GET /health - 健康检查
|
||
GET /api/v1/asset-type - 检测资产类型
|
||
GET /api/v1/ohlcv - 获取K线数据
|
||
POST /api/v1/ohlcv/batch - 批量获取K线数据
|
||
GET /api/v1/etf/nav - 获取ETF净值
|
||
POST /api/v1/cache/clear - 清理缓存
|
||
GET /api/v1/cache/stats - 缓存统计
|
||
"""
|
||
|
||
import os
|
||
import sys
|
||
import json
|
||
from pathlib import Path
|
||
from datetime import datetime, timedelta
|
||
from typing import Optional, Dict, Any, List, Tuple
|
||
from functools import lru_cache
|
||
|
||
# 添加项目根目录到路径
|
||
project_root = Path(__file__).parent.parent
|
||
sys.path.insert(0, str(project_root))
|
||
|
||
from dotenv import load_dotenv
|
||
load_dotenv()
|
||
|
||
from flask import Flask, request, jsonify
|
||
from flask_cors import CORS
|
||
import pandas as pd
|
||
|
||
from datasource.universal_fetcher import UniversalDataFetcher
|
||
from datasource.asset_type_detector import AssetTypeDetector, AssetType
|
||
|
||
|
||
# ============================================================
|
||
# Flask 应用配置
|
||
# ============================================================
|
||
|
||
app = Flask(__name__)
|
||
CORS(app) # 启用跨域支持
|
||
|
||
# 全局数据获取器实例
|
||
fetcher: Optional[UniversalDataFetcher] = None
|
||
ssh_config: Optional[Dict] = None
|
||
|
||
# 缓存配置
|
||
CACHE_MAXSIZE = int(os.getenv('CACHE_MAXSIZE', '128'))
|
||
CACHE_TTL_SECONDS = int(os.getenv('CACHE_TTL_SECONDS', '7200')) # 默认2小时
|
||
|
||
# 默认数据起点（下载全量数据时使用）
|
||
# 设置为1980年以支持最长历史数据（标普500/日经225等）
|
||
DEFAULT_START_DATE = os.getenv('DEFAULT_START_DATE', '1980-01-01')
|
||
|
||
|
||
class TimedCacheEntry:
|
||
"""带时间戳的缓存条目"""
|
||
def __init__(self, data: Any):
|
||
self.data = data
|
||
self.timestamp = datetime.now()
|
||
|
||
def is_expired(self) -> bool:
|
||
return (datetime.now() - self.timestamp).total_seconds() > CACHE_TTL_SECONDS
|
||
|
||
|
||
# TTL缓存存储
|
||
_ttl_cache: Dict[Tuple, TimedCacheEntry] = {}
|
||
|
||
|
||
# ============================================================
|
||
# 初始化
|
||
# ============================================================
|
||
|
||
def get_ssh_config() -> Optional[Dict]:
|
||
"""从环境变量获取 SSH 配置"""
|
||
enabled = os.getenv('SSH_ENABLED', 'false').lower() == 'true'
|
||
|
||
if not enabled:
|
||
return None
|
||
|
||
return {
|
||
"enabled": True,
|
||
"host": os.getenv('SSH_HOST', ''),
|
||
"port": int(os.getenv('SSH_PORT', '22')),
|
||
"username": os.getenv('SSH_USERNAME', ''),
|
||
"key_path": os.getenv('SSH_KEY_PATH', 'hk_ecs.pem'),
|
||
"local_port": int(os.getenv('SSH_LOCAL_PORT', '1080')),
|
||
}
|
||
|
||
|
||
def get_fetcher() -> UniversalDataFetcher:
|
||
"""获取或创建数据获取器实例"""
|
||
global fetcher, ssh_config
|
||
|
||
if fetcher is None:
|
||
ssh_config = get_ssh_config()
|
||
fetcher = UniversalDataFetcher(ssh_config=ssh_config)
|
||
|
||
return fetcher
|
||
|
||
|
||
# ============================================================
|
||
# 缓存机制
|
||
# ============================================================
|
||
|
||
@lru_cache(maxsize=CACHE_MAXSIZE)
|
||
def _fetch_full_data_cached(code: str, today: str) -> Optional[str]:
|
||
"""
|
||
缓存全量数据（仅日级别数据）
|
||
|
||
缓存策略：
|
||
- 日级别数据（股票/指数/ETF/期货）: 从 DEFAULT_START_DATE 到 today
|
||
- 加密货币: 不缓存，每次实时下载
|
||
|
||
缓存Key: (code, today_date)
|
||
- today: 实际的今天日期，用于每日更新缓存
|
||
|
||
Returns:
|
||
JSON 序列化的全量数据（仅日级别数据）
|
||
"""
|
||
f = get_fetcher()
|
||
|
||
# 检查资产类型
|
||
asset_type = AssetTypeDetector.detect(code)
|
||
|
||
# 加密货币不缓存
|
||
if asset_type == AssetType.CRYPTO:
|
||
return None # 不缓存加密货币
|
||
|
||
try:
|
||
with f:
|
||
# 下载数据：从默认起点到今天
|
||
df = f.fetch(code, DEFAULT_START_DATE, today)
|
||
|
||
if df is None or len(df) == 0:
|
||
return None
|
||
|
||
# 保存为 DataFrame 格式（方便后续切片）
|
||
result = {
|
||
'df_json': dataframe_to_json(df),
|
||
'code': code,
|
||
'asset_type': asset_type.value,
|
||
'data_start': df.index.min().strftime('%Y-%m-%d') if len(df) > 0 else None,
|
||
'data_end': df.index.max().strftime('%Y-%m-%d') if len(df) > 0 else None,
|
||
'cache_strategy': 'full_history',
|
||
}
|
||
|
||
return json.dumps(result)
|
||
except Exception as e:
|
||
return json.dumps({"error": str(e)})
|
||
|
||
|
||
def _slice_data_from_cache(cached_data: Dict, start: str, end: str) -> Dict:
|
||
"""
|
||
从缓存的全量数据中切片指定日期范围
|
||
|
||
Args:
|
||
cached_data: 缓存的全量数据
|
||
start: 用户请求的开始日期
|
||
end: 用户请求的结束日期
|
||
|
||
Returns:
|
||
切片后的数据（JSON格式）
|
||
"""
|
||
if 'df_json' not in cached_data or 'data' not in cached_data['df_json']:
|
||
return cached_data
|
||
|
||
# 从缓存数据中重建 DataFrame
|
||
records = cached_data['df_json']['data']
|
||
if not records:
|
||
return cached_data
|
||
|
||
# 转换为 DataFrame
|
||
df = pd.DataFrame(records)
|
||
if 'date' in df.columns:
|
||
df['date'] = pd.to_datetime(df['date'])
|
||
df = df.set_index('date')
|
||
|
||
# 切片日期范围
|
||
start_dt = pd.to_datetime(start)
|
||
end_dt = pd.to_datetime(end)
|
||
|
||
# 确保索引已排序
|
||
df = df.sort_index()
|
||
|
||
# 切片（使用 loc 进行日期范围选择）
|
||
sliced_df = df.loc[start_dt:end_dt]
|
||
|
||
if len(sliced_df) == 0:
|
||
return {
|
||
'data': [],
|
||
'count': 0,
|
||
'code': cached_data['code'],
|
||
'asset_type': cached_data['asset_type'],
|
||
'requested_range': {'start': start, 'end': end},
|
||
'available_range': {'start': cached_data['data_start'], 'end': cached_data['data_end']},
|
||
}
|
||
|
||
# 转换为 JSON 格式
|
||
result = dataframe_to_json(sliced_df)
|
||
result['code'] = cached_data['code']
|
||
result['asset_type'] = cached_data['asset_type']
|
||
result['requested_range'] = {'start': start, 'end': end}
|
||
result['available_range'] = {'start': cached_data['data_start'], 'end': cached_data['data_end']}
|
||
|
||
return result
|
||
|
||
|
||
def fetch_data_with_ttl(
|
||
code: str,
|
||
start: str,
|
||
end: str,
|
||
nocache: bool = False
|
||
) -> Tuple[Optional[Dict], bool]:
|
||
"""
|
||
获取数据，支持 TTL 缓存（加密货币不缓存）
|
||
|
||
缓存策略：
|
||
- 日级别数据（股票/指数/ETF/期货）: Key=(code, today), 缓存全量数据，切片返回
|
||
- 加密货币: 每次实时下载，不缓存
|
||
|
||
Args:
|
||
code: 标的代码
|
||
start: 用户请求的开始日期
|
||
end: 用户请求的结束日期
|
||
nocache: 是否跳过缓存
|
||
|
||
Returns:
|
||
(data, is_cached): 数据和是否命中缓存
|
||
"""
|
||
# 获取今天的实际日期（用于缓存Key）
|
||
today = datetime.now().strftime('%Y-%m-%d')
|
||
|
||
# 检查资产类型
|
||
asset_type = AssetTypeDetector.detect(code)
|
||
|
||
# 加密货币：直接下载，不缓存
|
||
if asset_type == AssetType.CRYPTO:
|
||
f = get_fetcher()
|
||
try:
|
||
with f:
|
||
df = f.fetch(code, start, end)
|
||
if df is None or len(df) == 0:
|
||
return None, False
|
||
result = dataframe_to_json(df)
|
||
result['code'] = code
|
||
result['asset_type'] = asset_type.value
|
||
result['cache_strategy'] = 'no_cache_crypto'
|
||
result['requested_range'] = {'start': start, 'end': end}
|
||
return result, False
|
||
except Exception as e:
|
||
return {'error': str(e), 'code': code, 'asset_type': asset_type.value}, False
|
||
|
||
# 日级别数据：使用缓存
|
||
full_cache_key = (code, today)
|
||
|
||
# 跳过缓存：清理缓存后重新下载
|
||
if nocache:
|
||
_fetch_full_data_cached.cache_clear()
|
||
global _ttl_cache
|
||
_ttl_cache.clear()
|
||
result_json = _fetch_full_data_cached(code, today)
|
||
if result_json is None:
|
||
return None, False
|
||
full_data = json.loads(result_json)
|
||
return (_slice_data_from_cache(full_data, start, end), False)
|
||
|
||
# 检查 TTL 缓存（全量数据缓存）
|
||
if full_cache_key in _ttl_cache:
|
||
entry = _ttl_cache[full_cache_key]
|
||
if not entry.is_expired():
|
||
# 从缓存切片
|
||
sliced_data = _slice_data_from_cache(entry.data, start, end)
|
||
return sliced_data, True
|
||
# 过期，删除
|
||
del _ttl_cache[full_cache_key]
|
||
|
||
# 从 LRU 缓存获取全量数据
|
||
result_json = _fetch_full_data_cached(code, today)
|
||
|
||
if result_json is None:
|
||
return None, False
|
||
|
||
full_data = json.loads(result_json)
|
||
|
||
# 检查是否有错误
|
||
if "error" in full_data:
|
||
return full_data, False
|
||
|
||
# 存入 TTL 缓存（存全量数据）
|
||
_ttl_cache[full_cache_key] = TimedCacheEntry(full_data)
|
||
|
||
# 从全量数据切片返回用户请求的范围
|
||
sliced_data = _slice_data_from_cache(full_data, start, end)
|
||
|
||
return sliced_data, False
|
||
|
||
|
||
def clear_cache():
|
||
"""清理所有缓存"""
|
||
global _ttl_cache
|
||
_fetch_full_data_cached.cache_clear()
|
||
_ttl_cache.clear()
|
||
|
||
|
||
def get_cache_info() -> Dict:
|
||
"""获取缓存统计信息"""
|
||
info = _fetch_full_data_cached.cache_info()
|
||
return {
|
||
"lru_cache": {
|
||
"hits": info.hits,
|
||
"misses": info.misses,
|
||
"maxsize": info.maxsize,
|
||
"currsize": info.currsize,
|
||
},
|
||
"ttl_cache_size": len(_ttl_cache),
|
||
"ttl_seconds": CACHE_TTL_SECONDS,
|
||
"default_start_date": DEFAULT_START_DATE,
|
||
"cache_strategy": "full_data_by_code_and_today",
|
||
}
|
||
|
||
|
||
# ============================================================
|
||
# DataFrame 转换
|
||
# ============================================================
|
||
|
||
def dataframe_to_json(df: pd.DataFrame) -> Dict:
|
||
"""将 DataFrame 转换为 JSON 可序列化的字典"""
|
||
if df is None or len(df) == 0:
|
||
return {"data": [], "count": 0}
|
||
|
||
# 重置索引
|
||
df_reset = df.reset_index()
|
||
|
||
# 处理日期列
|
||
date_columns = ['date', 'Date', 'index', 'trade_date', 'datetime']
|
||
for col in date_columns:
|
||
if col in df_reset.columns:
|
||
try:
|
||
df_reset[col] = pd.to_datetime(df_reset[col]).dt.strftime('%Y-%m-%d')
|
||
if col != 'date':
|
||
df_reset = df_reset.rename(columns={col: 'date'})
|
||
break
|
||
except Exception:
|
||
pass
|
||
|
||
# 转换为字典列表
|
||
records = df_reset.to_dict(orient='records')
|
||
|
||
return {
|
||
"data": records,
|
||
"count": len(records),
|
||
"columns": list(df_reset.columns),
|
||
"date_range": {
|
||
"start": df.index.min().strftime('%Y-%m-%d') if len(df) > 0 else None,
|
||
"end": df.index.max().strftime('%Y-%m-%d') if len(df) > 0 else None,
|
||
}
|
||
}
|
||
|
||
|
||
def validate_date(date_str: str) -> bool:
|
||
"""验证日期格式"""
|
||
try:
|
||
datetime.strptime(date_str, '%Y-%m-%d')
|
||
return True
|
||
except ValueError:
|
||
return False
|
||
|
||
|
||
def get_default_dates() -> Tuple[str, str]:
|
||
"""获取默认日期范围（最近3个月）"""
|
||
end = datetime.now()
|
||
start = end - timedelta(days=90)
|
||
return start.strftime('%Y-%m-%d'), end.strftime('%Y-%m-%d')
|
||
|
||
|
||
# ============================================================
|
||
# API 路由
|
||
# ============================================================
|
||
|
||
@app.route('/')
|
||
def index():
|
||
"""首页 - API 信息"""
|
||
return jsonify({
|
||
"name": "Universal Data Fetcher API",
|
||
"version": "2.0.0",
|
||
"description": "统一数据获取服务（分层架构）",
|
||
"architecture": "Unified entry + Asset-specific methods",
|
||
"features": [
|
||
"分层架构（各资产类型独立实现）",
|
||
"LRU + TTL 双缓存机制",
|
||
"SSH隧道支持（港美股）",
|
||
"ETF净值获取（计算溢价率）",
|
||
],
|
||
"endpoints": {
|
||
"info": "/",
|
||
"health": "/health",
|
||
"asset_type": "/api/v1/asset-type?code={code}",
|
||
"ohlcv": "/api/v1/ohlcv?code={code}&start={YYYY-MM-DD}&end={YYYY-MM-DD}&asset_type={type}",
|
||
"ohlcv_nocache": "/api/v1/ohlcv?code={code}&nocache=true",
|
||
"ohlcv_asset_type": "/api/v1/ohlcv?code={code}&asset_type=china_index (验证类型)",
|
||
"batch": "POST /api/v1/ohlcv/batch",
|
||
"etf_nav": "/api/v1/etf/nav?code={code}",
|
||
"cache_clear": "POST /api/v1/cache/clear",
|
||
"cache_stats": "/api/v1/cache/stats",
|
||
},
|
||
"asset_types": {
|
||
"china_index": "中国指数 (000300.SH, 399006.SZ等)",
|
||
"china_etf": "中国ETF (159915.SZ, 513100.SH等)",
|
||
"us_index": "美股指数 (NDX, SPX, N225等)",
|
||
"hk_index": "港股指数 (HSI, HSTECH.HK等)",
|
||
"futures": "期货 (AU.SHF, CU.SHF等)",
|
||
"crypto": "加密货币 (BTC, ETH - 不缓存)",
|
||
},
|
||
"supported_assets": {
|
||
"china_index": ["000300.SH", "399006.SZ", "H30269.CSI"],
|
||
"china_etf": ["159915.SZ", "513100.SH", "518880.SH"],
|
||
"hk_index": ["HSI", "HSTECH.HK"],
|
||
"us_index": ["NDX", "SPX", "N225", "GDAXI"],
|
||
"futures": ["AU.SHF", "CU.SHF", "CL.NYM"],
|
||
"crypto": ["BTC", "ETH"],
|
||
},
|
||
"cache_config": get_cache_info(),
|
||
"ssh_status": "enabled" if ssh_config and ssh_config.get('enabled') else "disabled",
|
||
})
|
||
|
||
|
||
@app.route('/health')
|
||
def health():
|
||
"""健康检查"""
|
||
return jsonify({
|
||
"status": "healthy",
|
||
"timestamp": datetime.now().isoformat(),
|
||
"ssh_configured": ssh_config is not None and ssh_config.get('enabled', False),
|
||
})
|
||
|
||
|
||
@app.route('/api/v1/asset-type')
|
||
def detect_asset_type():
|
||
"""检测资产类型"""
|
||
code = request.args.get('code', '').strip()
|
||
|
||
if not code:
|
||
return jsonify({
|
||
"error": "Missing required parameter: code",
|
||
"example": "/api/v1/asset-type?code=000300.SH"
|
||
}), 400
|
||
|
||
asset_type = AssetTypeDetector.detect(code)
|
||
description = AssetTypeDetector.get_description(asset_type)
|
||
|
||
return jsonify({
|
||
"code": code,
|
||
"asset_type": asset_type.value,
|
||
"description": description,
|
||
})
|
||
|
||
|
||
@app.route('/api/v1/ohlcv')
|
||
def get_ohlcv():
|
||
"""
|
||
获取单只标的的 OHLCV 数据
|
||
|
||
Query Parameters:
|
||
code: 标的代码 (required)
|
||
start: 开始日期 YYYY-MM-DD (optional, 默认90天前)
|
||
end: 结束日期 YYYY-MM-DD (optional, 默认今天)
|
||
asset_type: 资产类型 (optional, 用于验证或强制指定)
|
||
- china_index: 中国指数
|
||
- china_etf: 中国ETF
|
||
- us_index: 美股指数
|
||
- hk_index: 港股指数
|
||
- futures: 期货
|
||
- crypto: 加密货币
|
||
nocache: 是否跳过缓存 (optional, 默认false)
|
||
"""
|
||
code = request.args.get('code', '').strip()
|
||
start = request.args.get('start', '').strip()
|
||
end = request.args.get('end', '').strip()
|
||
asset_type_param = request.args.get('asset_type', '').strip().lower()
|
||
nocache = request.args.get('nocache', 'false').lower() == 'true'
|
||
|
||
# 参数验证
|
||
if not code:
|
||
return jsonify({
|
||
"error": "Missing required parameter: code",
|
||
"example": "/api/v1/ohlcv?code=000300.SH&start=2024-01-01&end=2024-03-31",
|
||
"asset_type_hint": "可选 asset_type 参数强制指定类型",
|
||
}), 400
|
||
|
||
# 设置默认日期
|
||
if not start or not end:
|
||
start, end = get_default_dates()
|
||
|
||
# 日期格式验证
|
||
if not validate_date(start) or not validate_date(end):
|
||
return jsonify({
|
||
"error": "Invalid date format. Use YYYY-MM-DD",
|
||
"start": start,
|
||
"end": end,
|
||
}), 400
|
||
|
||
# 自动检测资产类型
|
||
detected_type = AssetTypeDetector.detect(code)
|
||
|
||
# 如果指定了 asset_type 参数，验证是否匹配
|
||
if asset_type_param:
|
||
try:
|
||
# 将字符串转换为 AssetType
|
||
expected_type = AssetType(asset_type_param)
|
||
if detected_type != expected_type:
|
||
return jsonify({
|
||
"error": f"Asset type mismatch",
|
||
"code": code,
|
||
"detected_type": detected_type.value,
|
||
"expected_type": expected_type.value,
|
||
"hint": f"代码 {code} 自动检测为 {detected_type.value}, 但指定了 {expected_type.value}",
|
||
}), 400
|
||
except ValueError:
|
||
return jsonify({
|
||
"error": f"Invalid asset_type: {asset_type_param}",
|
||
"valid_types": [t.value for t in AssetType],
|
||
}), 400
|
||
|
||
# 使用缓存获取数据
|
||
result, is_cached = fetch_data_with_ttl(code, start, end, nocache)
|
||
|
||
if result is None:
|
||
return jsonify({
|
||
"code": code,
|
||
"asset_type": detected_type.value,
|
||
"error": "No data available",
|
||
"start": start,
|
||
"end": end,
|
||
}), 404
|
||
|
||
if "error" in result:
|
||
return jsonify({
|
||
"code": code,
|
||
"asset_type": detected_type.value,
|
||
"error": result["error"],
|
||
}), 500
|
||
|
||
result['cached'] = is_cached
|
||
result['asset_type'] = detected_type.value # 确保返回类型
|
||
return jsonify(result)
|
||
|
||
|
||
@app.route('/api/v1/ohlcv/batch', methods=['POST'])
|
||
def batch_ohlcv():
|
||
"""批量获取多只标的的 OHLCV 数据"""
|
||
data = request.get_json()
|
||
|
||
if not data:
|
||
return jsonify({
|
||
"error": "Missing request body",
|
||
"example": {
|
||
"codes": ["000300.SH", "NDX"],
|
||
"start": "2024-01-01",
|
||
"end": "2024-03-31",
|
||
}
|
||
}), 400
|
||
|
||
codes = data.get('codes', [])
|
||
start = data.get('start', '').strip()
|
||
end = data.get('end', '').strip()
|
||
|
||
if not codes or not isinstance(codes, list):
|
||
return jsonify({
|
||
"error": "Missing or invalid parameter: codes (must be a list)"
|
||
}), 400
|
||
|
||
if not start or not end:
|
||
start, end = get_default_dates()
|
||
|
||
if not validate_date(start) or not validate_date(end):
|
||
return jsonify({
|
||
"error": "Invalid date format. Use YYYY-MM-DD",
|
||
}), 400
|
||
|
||
# 获取数据
|
||
f = get_fetcher()
|
||
results = {}
|
||
success_count = 0
|
||
failed_count = 0
|
||
|
||
try:
|
||
with f:
|
||
for code in codes:
|
||
result, _ = fetch_data_with_ttl(code, start, end)
|
||
|
||
if result is not None and "error" not in result:
|
||
results[code] = result
|
||
success_count += 1
|
||
else:
|
||
results[code] = {
|
||
"code": code,
|
||
"asset_type": AssetTypeDetector.detect(code).value,
|
||
"error": result.get("error", "No data") if result else "No data",
|
||
"data": [],
|
||
"count": 0,
|
||
}
|
||
failed_count += 1
|
||
except Exception as e:
|
||
return jsonify({"error": f"Batch fetch failed: {str(e)}"}), 500
|
||
|
||
return jsonify({
|
||
"results": results,
|
||
"success_count": success_count,
|
||
"failed_count": failed_count,
|
||
"total": len(codes),
|
||
"start": start,
|
||
"end": end,
|
||
})
|
||
|
||
|
||
@app.route('/api/v1/etf/nav')
|
||
def get_etf_nav():
|
||
"""获取ETF净值数据（用于计算溢价率）"""
|
||
code = request.args.get('code', '').strip()
|
||
start = request.args.get('start', '').strip()
|
||
end = request.args.get('end', '').strip()
|
||
|
||
if not code:
|
||
return jsonify({
|
||
"error": "Missing required parameter: code",
|
||
"example": "/api/v1/etf/nav?code=513100.SH"
|
||
}), 400
|
||
|
||
if not start or not end:
|
||
start, end = get_default_dates()
|
||
|
||
# 检查是否为ETF
|
||
asset_type = AssetTypeDetector.detect(code)
|
||
if asset_type != AssetType.CHINA_ETF:
|
||
return jsonify({
|
||
"error": f"Not an ETF: {code} (type: {asset_type.value})",
|
||
"hint": "Only A股ETF (codes starting with 51/52/15/16) supported",
|
||
}), 400
|
||
|
||
# 获取净值和溢价率
|
||
f = get_fetcher()
|
||
try:
|
||
with f:
|
||
price_df, nav_df, premium_series = f.fetch_etf_with_nav(code, start, end)
|
||
|
||
result = {
|
||
"code": code,
|
||
"price": dataframe_to_json(price_df) if price_df else {"data": [], "count": 0},
|
||
"nav": dataframe_to_json(nav_df) if nav_df else {"data": [], "count": 0},
|
||
}
|
||
|
||
# 添加历史溢价率序列
|
||
if premium_series is not None and len(premium_series) > 0:
|
||
# 转换为日期-溢价率列表
|
||
premium_data = [
|
||
{"date": date.strftime('%Y-%m-%d'), "premium": round(premium, 6)}
|
||
for date, premium in premium_series.items()
|
||
]
|
||
result['premium_series'] = premium_data
|
||
|
||
# 最新溢价率
|
||
latest_premium = premium_series.iloc[-1]
|
||
latest_date = premium_series.index[-1].strftime('%Y-%m-%d')
|
||
result['latest_premium'] = round(latest_premium, 6)
|
||
result['premium_date'] = latest_date
|
||
|
||
# 溢价率统计
|
||
result['premium_stats'] = {
|
||
"mean": round(premium_series.mean(), 6),
|
||
"std": round(premium_series.std(), 6),
|
||
"min": round(premium_series.min(), 6),
|
||
"max": round(premium_series.max(), 6),
|
||
"median": round(premium_series.median(), 6),
|
||
}
|
||
|
||
|
||
return jsonify(result)
|
||
|
||
except Exception as e:
|
||
return jsonify({"error": str(e)}), 500
|
||
|
||
|
||
@app.route('/api/v1/cache/clear', methods=['POST'])
|
||
def clear_cache_endpoint():
|
||
"""清理缓存"""
|
||
info_before = get_cache_info()
|
||
clear_cache()
|
||
return jsonify({
|
||
"message": "Cache cleared successfully",
|
||
"before": info_before,
|
||
"after": get_cache_info()
|
||
})
|
||
|
||
|
||
@app.route('/api/v1/cache/stats')
|
||
def cache_stats():
|
||
"""获取缓存统计"""
|
||
return jsonify(get_cache_info())
|
||
|
||
|
||
# ============================================================
|
||
# 错误处理
|
||
# ============================================================
|
||
|
||
@app.errorhandler(404)
|
||
def not_found(error):
|
||
return jsonify({
|
||
"error": "Endpoint not found",
|
||
"available_endpoints": [
|
||
"/", "/health",
|
||
"/api/v1/asset-type",
|
||
"/api/v1/ohlcv",
|
||
"/api/v1/ohlcv/batch",
|
||
"/api/v1/etf/nav",
|
||
"/api/v1/cache/clear",
|
||
"/api/v1/cache/stats",
|
||
]
|
||
}), 404
|
||
|
||
|
||
@app.errorhandler(500)
|
||
def internal_error(error):
|
||
return jsonify({
|
||
"error": "Internal server error",
|
||
"message": str(error)
|
||
}), 500
|
||
|
||
|
||
# ============================================================
|
||
# 启动服务
|
||
# ============================================================
|
||
|
||
if __name__ == '__main__':
|
||
import argparse
|
||
|
||
parser = argparse.ArgumentParser(description='Universal Data Fetcher API Server')
|
||
parser.add_argument('--host', default='0.0.0.0', help='Host to bind')
|
||
parser.add_argument('--port', type=int, default=5000, help='Port to bind')
|
||
parser.add_argument('--debug', action='store_true', help='Enable debug mode')
|
||
|
||
args = parser.parse_args()
|
||
|
||
# 预加载 SSH 配置
|
||
ssh_config = get_ssh_config()
|
||
if ssh_config and ssh_config.get('enabled'):
|
||
print(f"✓ SSH 隧道已配置: {ssh_config['host']}:{ssh_config['port']}")
|
||
else:
|
||
print("✗ SSH 隧道未启用（仅支持A股数据）")
|
||
|
||
print(f"\n🚀 Universal Data Fetcher API Server v2.0")
|
||
print(f" Host: {args.host}")
|
||
print(f" Port: {args.port}")
|
||
print(f" Cache: LRU({CACHE_MAXSIZE}) + TTL({CACHE_TTL_SECONDS}s)")
|
||
print(f"\n📖 API: http://{args.host}:{args.port}/")
|
||
print(f" 健康检查: http://{args.host}:{args.port}/health")
|
||
|
||
app.run(host=args.host, port=args.port, debug=args.debug) |