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micro_servers/static/fsys.py
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2026-07-30 22:05:12 +08:00

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# file_server.py - 极简版文件托管服务器
from flask import Flask, send_from_directory, jsonify, request, Response, send_file
from flask_cors import CORS
import os
import argparse
import datetime
import logging
from logging.handlers import RotatingFileHandler
from pathlib import Path
import configparser
import sys
# pymsg 日志客户端(集中式日志 → dbv2 Logs 表)
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
from log_client import logs # noqa: E402
from security_middleware import apply_security_headers # noqa: E402
# 基准目录:编译后取可执行文件所在目录,开发时取脚本所在目录
# 解决 Nuitka onefile 解压到 /tmp 后相对路径失效的问题
if getattr(sys, 'frozen', False):
BASE_DIR = os.path.dirname(os.path.abspath(sys.executable))
else:
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
# 配置日志
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
file_handler = RotatingFileHandler(os.path.join(BASE_DIR, 'app.log'), maxBytes=10485760, backupCount=10)
file_handler.setFormatter(logging.Formatter(
'%(asctime)s %(levelname)s: %(message)s'
))
file_handler.setLevel(logging.INFO)
logger.addHandler(file_handler)
parser = argparse.ArgumentParser(description='File Server')
parser.add_argument('--config', type=str, default='config.ini', help='Configuration file path')
args = parser.parse_args()
app = Flask(__name__)
apply_security_headers(app)
# ==================== 配置文件加载 ====================
CONFIG_FILE = args.config
if not os.path.isabs(CONFIG_FILE):
CONFIG_FILE = os.path.join(BASE_DIR, CONFIG_FILE)
file_config = {
'server': {'host': '0.0.0.0', 'port': '5000'},
'directory': {'root': './public'},
'ssl': {'enabled': 'false', 'cert_file': 'cert.pem', 'key_file': 'key.pem'},
# CORS 白名单(逗号分隔),生产环境默认值;localhost 仅限本地开发时显式写入 config.ini
'cors': {'allowed_origins': 'https://qsont.me,https://yhdet.top'},
}
if os.path.exists(CONFIG_FILE):
config_parser = configparser.ConfigParser()
config_parser.read(CONFIG_FILE, encoding='utf-8')
for section in ['server', 'directory', 'ssl', 'cors']:
if section in config_parser:
for key, value in config_parser[section].items():
if key in file_config[section]:
file_config[section][key] = value
# ==================== CORS(配置加载完成后初始化) ====================
_cors_origins = [o.strip() for o in file_config['cors']['allowed_origins'].split(',') if o.strip()]
CORS(app, origins=_cors_origins)
HTML_ROOT_DIR = file_config['directory']['root']
if HTML_ROOT_DIR and not os.path.isabs(HTML_ROOT_DIR):
HTML_ROOT_DIR = os.path.join(BASE_DIR, HTML_ROOT_DIR)
FILESYSTEM_ENABLED = bool(HTML_ROOT_DIR and HTML_ROOT_DIR.strip())
if FILESYSTEM_ENABLED:
try:
Path(HTML_ROOT_DIR).mkdir(parents=True, exist_ok=True)
logger.info(f"Created directory: {HTML_ROOT_DIR}")
logs.info("static", f"目录已创建: {HTML_ROOT_DIR}")
except Exception as e:
logger.error(f"Failed to create directory: {str(e)}")
logs.error("static", f"目录创建失败: {str(e)}",
extra={"path": HTML_ROOT_DIR})
FILESYSTEM_ENABLED = False
SSL_ENABLED = file_config['ssl'].get('enabled', 'false').lower() == 'true'
SSL_CERT_FILE = file_config['ssl'].get('cert_file', 'cert.pem')
SSL_KEY_FILE = file_config['ssl'].get('key_file', 'key.pem')
if not os.path.isabs(SSL_CERT_FILE):
SSL_CERT_FILE = os.path.join(BASE_DIR, SSL_CERT_FILE)
if not os.path.isabs(SSL_KEY_FILE):
SSL_KEY_FILE = os.path.join(BASE_DIR, SSL_KEY_FILE)
# 视图文件名:根路径与目录访问时固定返回此静态文件,由前端 JS 调用 /api/filelist 拉取数据
VIEW_FILE = '__view.html'
# ==================== 视频文件支持 ====================
VIDEO_MIME_TYPES = {
'.mp4': 'video/mp4', '.webm': 'video/webm', '.ogg': 'video/ogg',
'.avi': 'video/x-msvideo', '.mov': 'video/quicktime', '.mkv': 'video/x-matroska'
}
AUDIO_MIME_TYPES = {
'.mp3': 'audio/mpeg', '.wav': 'audio/wav', '.ogg': 'audio/ogg',
'.flac': 'audio/flac', '.aac': 'audio/aac', '.m4a': 'audio/mp4'
}
def is_video_file(filename):
return os.path.splitext(filename)[1].lower() in VIDEO_MIME_TYPES
def is_audio_file(filename):
return os.path.splitext(filename)[1].lower() in AUDIO_MIME_TYPES
def get_media_mime_type(filename):
ext = os.path.splitext(filename)[1].lower()
return VIDEO_MIME_TYPES.get(ext) or AUDIO_MIME_TYPES.get(ext) or 'application/octet-stream'
def safe_path_join(base_dir, user_path):
if not user_path or user_path.strip() == '' or user_path.strip() == '/':
return base_dir
if user_path.startswith('/'):
user_path = user_path[1:]
full_path = os.path.normpath(os.path.join(base_dir, user_path))
base_dir_real = os.path.realpath(base_dir)
full_path_real = os.path.realpath(full_path)
if not full_path_real.startswith(base_dir_real):
return None
return full_path_real
def format_file_size(size):
for unit in ['B', 'KB', 'MB', 'GB']:
if size < 1024.0:
return f"{size:.1f}{unit}"
size /= 1024.0
return f"{size:.1f}TB"
# ==================== API 接口 ====================
@app.route('/api/filelist', methods=['GET'])
def get_file_list():
try:
if not FILESYSTEM_ENABLED:
return jsonify({'error': '文件系统未启用'}), 403
requested_path = request.args.get('path', '')
full_path = safe_path_join(HTML_ROOT_DIR, requested_path)
if full_path is None:
return jsonify({'error': '无效的路径'}), 403
if not os.path.exists(full_path) or not os.path.isdir(full_path):
return jsonify({'error': '目录不存在'}), 404
items = []
for item in os.listdir(full_path):
# 过滤系统项目:以双下划线开头的文件和文件夹(如 __pycache__、__view.html、__icons 等)
if item.startswith('__'):
continue
item_path = os.path.join(full_path, item)
item_stat = os.stat(item_path)
is_dir = os.path.isdir(item_path)
item_rel_path = os.path.join(requested_path, item) if requested_path else item
file_type = 'dir' if is_dir else ('video' if is_video_file(item) else ('audio' if is_audio_file(item) else 'file'))
items.append({
'name': item,
'type': file_type,
'path': item_rel_path,
'size': item_stat.st_size if not is_dir else 0,
'size_formatted': format_file_size(item_stat.st_size) if not is_dir else '',
'modified': datetime.datetime.fromtimestamp(item_stat.st_mtime).strftime('%Y-%m-%d %H:%M:%S')
})
items.sort(key=lambda x: (x['type'] != 'dir', x['name'].lower()))
return jsonify({
'success': True,
'path': requested_path or '/',
'parent_path': os.path.dirname(requested_path) if requested_path and os.path.dirname(requested_path) != '/' else '',
'items': items
})
except Exception as e:
logger.error(f"Get file list error: {str(e)}")
logs.error("static", f"获取文件列表失败: {str(e)}",
extra={"path": requested_path})
return jsonify({'error': str(e)}), 500
@app.route('/video/<path:file_path>', methods=['GET'])
def stream_video(file_path):
try:
if not FILESYSTEM_ENABLED:
return jsonify({'error': '文件系统未启用'}), 403
full_path = safe_path_join(HTML_ROOT_DIR, file_path)
if full_path is None or not os.path.exists(full_path) or not os.path.isfile(full_path):
return jsonify({'error': '文件不存在'}), 404
if not is_video_file(full_path) and not is_audio_file(full_path):
return jsonify({'error': '不支持的文件类型'}), 400
file_size = os.path.getsize(full_path)
mime_type = get_media_mime_type(full_path)
range_header = request.headers.get('Range', None)
if range_header:
byte_range = range_header.replace('bytes=', '').split('-')
start = int(byte_range[0]) if byte_range[0] else 0
end = int(byte_range[1]) if len(byte_range) > 1 and byte_range[1] else file_size - 1
if start >= file_size:
return jsonify({'error': '请求范围超出文件大小'}), 416
length = end - start + 1
with open(full_path, 'rb') as f:
f.seek(start)
data = f.read(length)
response = Response(data, 206, mimetype=mime_type, direct_passthrough=True)
response.headers.add('Content-Range', f'bytes {start}-{end}/{file_size}')
response.headers.add('Accept-Ranges', 'bytes')
response.headers.add('Content-Length', str(length))
response.headers.add('Cache-Control', 'no-cache')
return response
else:
return send_file(full_path, mimetype=mime_type, as_attachment=False)
except Exception as e:
logger.error(f"Video streaming error: {str(e)}")
logs.error("static", f"视频流传输失败: {str(e)}",
extra={"file": file_path})
return jsonify({'error': str(e)}), 500
GATEWAY_DB = '/opt/micro_servers/gateway/sqlite3.db'
@app.route('/api/hash', methods=['POST'])
def api_hash():
from flask import request, jsonify
import hashlib
data = request.get_json(force=True)
h = hashlib.sha256(data.get('password','').encode()).hexdigest()
return jsonify({"hash": h})
@app.route('/api/reset_password', methods=['POST'])
def api_reset_password():
from flask import request, jsonify
import sqlite3 as _sql
data = request.get_json(force=True)
email = data.get('email', '').strip()
new_hash = data.get('password_hash', '').strip()
if not email or not new_hash:
return jsonify({"success": False, "error": "missing params"}), 400
conn = _sql.connect(GATEWAY_DB)
conn.execute("UPDATE Users SET password_hash=? WHERE email=?", (new_hash, email))
conn.commit()
conn.close()
logs.info("static", "密码重置", extra={"email": email[:3] + "***"})
return jsonify({"success": True})
@app.route('/api/check_user', methods=['POST'])
def api_check_user():
from flask import request, jsonify
import sqlite3 as _sql
data = request.get_json(force=True)
email = data.get('email', '').strip()
if not email:
return jsonify({"success": False, "error": "missing email"}), 400
conn = _sql.connect(GATEWAY_DB)
rows = conn.execute("SELECT email FROM Users WHERE email=?", (email,)).fetchall()
conn.close()
return jsonify({"success": True, "found": len(rows) > 0})
YHDET_VERIFY_URL = "https://yhdet.top/api/verify_auth_token"
YHDET_SECRET = "yhdet_qsont_oauth_2026_secret_key"
GATEWAY_DB_YHDET = '/opt/micro_servers/gateway/sqlite3.db'
def _yhdet_verify_token(token):
import traceback
import urllib.request, json
try:
data = json.dumps({"token": token}).encode()
req = urllib.request.Request(YHDET_VERIFY_URL, data=data,
headers={"Content-Type": "application/json"}, method="POST")
with urllib.request.urlopen(req, timeout=10) as resp:
return json.loads(resp.read().decode("utf-8"))
except Exception as e:
traceback.print_exc()
raise
@app.route('/yhdet_callback', methods=['GET', 'POST'])
def yhdet_callback():
from flask import request, make_response
import hashlib, sqlite3, base64, json as _json, urllib.request as _urlreq
token = (request.args.get('yhdet_token', '') or request.form.get('yhdet_token', '')).strip()
if not token:
return make_response("No token", 400)
try:
result = _yhdet_verify_token(token)
if not result.get("success"):
return make_response("Verify failed: " + str(result), 401)
username = result.get("username", "")
user_id = result.get("user_id", 0)
except Exception as e:
import traceback
traceback.print_exc()
return make_response("Verify error: " + str(e), 500)
email = f"yhdet_{user_id}@yhdet.oauth"
password = f"oauth_{user_id}"
conn = sqlite3.connect(GATEWAY_DB_YHDET)
rows = conn.execute("SELECT email FROM Users WHERE email=?", (email,)).fetchall()
if not rows:
fake_hash = hashlib.sha256(password.encode()).hexdigest()
conn.execute("INSERT INTO Users (email, password_hash) VALUES (?, ?)", (email, fake_hash))
conn.commit()
logs.info("static", "OAuth 新用户注册", extra={"email": email})
conn.close()
try:
login_data = _json.dumps({"username": email, "password": password}).encode()
req = _urlreq.Request("https://qsont.me/login", data=login_data,
headers={"Content-Type": "application/json"}, method="POST")
with _urlreq.urlopen(req, timeout=10, context=__import__('ssl')._create_unverified_context()) as resp:
login_result = _json.loads(resp.read().decode("utf-8"))
real_token = login_result.get("data", {}).get("token", "")
except Exception as e:
import traceback
traceback.print_exc()
real_token = ""
html = "<!DOCTYPE html><html><head><meta charset='utf-8'></head><body><p>Login...</p><script>"
if real_token:
html += "localStorage.setItem('q4_token','" + real_token + "');"
html += "sessionStorage.setItem('q4_token','" + real_token + "');"
html += "location.href='/dnfs.html';"
html += "</script></body></html>"
return make_response(html, 200)
@app.route('/api/yhdet_login', methods=['POST'])
def yhdet_login():
import hashlib, sqlite3, base64
data = request.get_json(force=True) if request.is_json else {}
email = data.get("email", "").strip()
password = data.get("password", "").strip()
if not email or not password:
return jsonify({"success": False, "error": "Missing params"}), 400
pwd_hash = hashlib.sha256(password.encode()).hexdigest()
conn = sqlite3.connect(GATEWAY_DB_YHDET)
rows = conn.execute("SELECT email, password_hash FROM Users WHERE email=?", (email,)).fetchall()
conn.close()
if not rows:
logs.warning("static", "yhdet 登录失败-用户不存在",
extra={"email": email[:8] + "***"})
return jsonify({"success": False, "error": "Invalid credentials"})
if rows[0][1] != pwd_hash:
logs.warning("static", "yhdet 登录失败-密码错误",
extra={"email": email[:8] + "***"})
return jsonify({"success": False, "error": "Invalid credentials"})
logs.info("static", "yhdet 登录成功",
extra={"email": email[:8] + "***"})
token_data = f"{email}:{password}"
token = base64.urlsafe_b64encode(token_data.encode()).decode()
return jsonify({"success": True, "token": token})
@app.route('/api/yhdet_verify', methods=['POST'])
def yhdet_verify():
import base64, hashlib, sqlite3
data = request.get_json(force=True)
token = data.get("token", "")
if not token:
return jsonify({"success": False}), 400
try:
decoded = base64.urlsafe_b64decode(token.encode()).decode()
parts = decoded.split(":")
if len(parts) == 3 and parts[1] == "oauth":
return jsonify({"success": True, "email": parts[0], "type": "oauth"})
if len(parts) == 2:
email, password = parts
pwd_hash = hashlib.sha256(password.encode()).hexdigest()
conn = sqlite3.connect(GATEWAY_DB_YHDET)
rows = conn.execute("SELECT email FROM Users WHERE email=? AND password_hash=?", (email, pwd_hash)).fetchall()
conn.close()
if rows:
return jsonify({"success": True, "email": email, "type": "password"})
return jsonify({"success": False})
except:
return jsonify({"success": False})
PRIVATE_SECRET = "qsont_me_yhdet_2026_private"
YHDET_PRIVATE_API = "https://yhdet.top/api/v1/private"
from flask import make_response
import urllib.request as _urlreq, json as _json
DNFS_URL = "http://127.0.0.1:8006"
def _cors(resp):
resp.headers["Access-Control-Allow-Origin"] = "*"
resp.headers["Access-Control-Allow-Headers"] = "Content-Type, Authorization"
resp.headers["Access-Control-Allow-Methods"] = "GET, POST, OPTIONS"
return resp
@app.route('/get_notes', methods=['POST', 'OPTIONS'])
def proxy_get_notes():
if request.method == "OPTIONS": return _cors(make_response("", 204))
try:
data = request.get_json(force=True)
h = {"Content-Type": "application/json"}
if "Authorization" in request.headers: h["Authorization"] = request.headers["Authorization"]
elif request.cookies.get("q4_token"): h["Authorization"] = f"Bearer {request.cookies['q4_token']}" # HttpOnly Cookie 模式:Cookie 转 Bearer
req = _urlreq.Request(f"{DNFS_URL}/get_notes", data=_json.dumps(data).encode(), headers=h, method="POST")
with _urlreq.urlopen(req, timeout=15) as r:
return _cors(make_response(r.read().decode(), 200, {"Content-Type": "application/json"}))
except Exception as e:
logs.warning("static", "dnfs get_notes 代理失败",
extra={"error": str(e)})
return _cors(make_response(_json.dumps({"error": str(e)}), 502, {"Content-Type": "application/json"}))
@app.route('/add_note', methods=['POST', 'OPTIONS'])
def proxy_add_note():
if request.method == "OPTIONS": return _cors(make_response("", 204))
try:
data = request.get_json(force=True)
h = {"Content-Type": "application/json"}
if "Authorization" in request.headers: h["Authorization"] = request.headers["Authorization"]
elif request.cookies.get("q4_token"): h["Authorization"] = f"Bearer {request.cookies['q4_token']}" # HttpOnly Cookie 模式:Cookie 转 Bearer
req = _urlreq.Request(f"{DNFS_URL}/add_note", data=_json.dumps(data).encode(), headers=h, method="POST")
with _urlreq.urlopen(req, timeout=15) as r:
return _cors(make_response(r.read().decode(), 200, {"Content-Type": "application/json"}))
except Exception as e:
logs.warning("static", "dnfs add_note 代理失败", extra={"error": str(e)})
return _cors(make_response(_json.dumps({"error": str(e)}), 502, {"Content-Type": "application/json"}))
@app.route('/delete_note', methods=['POST', 'OPTIONS'])
def proxy_delete_note():
if request.method == "OPTIONS": return _cors(make_response("", 204))
try:
data = request.get_json(force=True)
h = {"Content-Type": "application/json"}
if "Authorization" in request.headers: h["Authorization"] = request.headers["Authorization"]
elif request.cookies.get("q4_token"): h["Authorization"] = f"Bearer {request.cookies['q4_token']}" # HttpOnly Cookie 模式:Cookie 转 Bearer
req = _urlreq.Request(f"{DNFS_URL}/delete_note", data=_json.dumps(data).encode(), headers=h, method="POST")
with _urlreq.urlopen(req, timeout=15) as r:
return _cors(make_response(r.read().decode(), 200, {"Content-Type": "application/json"}))
except Exception as e:
logs.warning("static", "dnfs delete_note 代理失败", extra={"error": str(e)})
return _cors(make_response(_json.dumps({"error": str(e)}), 502, {"Content-Type": "application/json"}))
@app.route('/update_note', methods=['POST', 'OPTIONS'])
def proxy_update_note():
if request.method == "OPTIONS": return _cors(make_response("", 204))
try:
data = request.get_json(force=True)
h = {"Content-Type": "application/json"}
if "Authorization" in request.headers: h["Authorization"] = request.headers["Authorization"]
elif request.cookies.get("q4_token"): h["Authorization"] = f"Bearer {request.cookies['q4_token']}" # HttpOnly Cookie 模式:Cookie 转 Bearer
req = _urlreq.Request(f"{DNFS_URL}/update_note", data=_json.dumps(data).encode(), headers=h, method="POST")
with _urlreq.urlopen(req, timeout=15) as r:
return _cors(make_response(r.read().decode(), 200, {"Content-Type": "application/json"}))
except Exception as e:
logs.warning("static", "dnfs update_note 代理失败",
extra={"error": str(e)})
return _cors(make_response(_json.dumps({"error": str(e)}), 502, {"Content-Type": "application/json"}))
@app.route('/api/proxy_send_code', methods=['POST'])
def proxy_send_code():
from flask import request, jsonify
import urllib.request as _urlreq, json as _json, __import__ as _imp
data = request.get_json(force=True)
req_data = _json.dumps(data).encode()
req = _urlreq.Request(f"{YHDET_PRIVATE_API}/send_code", data=req_data,
headers={"Content-Type": "application/json", "X-Forwarded-For": "8.137.52.11", "X-Secret": PRIVATE_SECRET}, method="POST")
ctx = _imp('ssl').create_default_context()
ctx.check_hostname = False
ctx.verify_mode = _imp('ssl').CERT_NONE
with _urlreq.urlopen(req, timeout=15, context=ctx) as resp:
return jsonify(_json.loads(resp.read().decode("utf-8")))
req = _urlreq.Request(f"{YHDET_PRIVATE_API}/check_code", data=req_data,
headers={"Content-Type": "application/json", "X-Forwarded-For": "8.137.52.11", "X-Secret": PRIVATE_SECRET}, method="POST")
ctx = _imp('ssl').create_default_context()
ctx.check_hostname = False
ctx.verify_mode = _imp('ssl').CERT_NONE
with _urlreq.urlopen(req, timeout=15, context=ctx) as resp:
return jsonify(_json.loads(resp.read().decode("utf-8")))
# ==================== 主路由 ====================
@app.route('/')
def serve_view():
"""根路径:优先返回 index.html(社区首页),不存在时回退到 __view.html(文件浏览)"""
if not FILESYSTEM_ENABLED:
return "文件系统未启用", 403
index_path = os.path.join(HTML_ROOT_DIR, 'index.html')
if os.path.exists(index_path):
return send_file(index_path, mimetype='text/html')
view_path = os.path.join(HTML_ROOT_DIR, VIEW_FILE)
if not os.path.exists(view_path):
return f"视图文件 {VIEW_FILE} 不存在", 500
return send_file(view_path, mimetype='text/html')
@app.route('/<path:path>')
def serve_file(path):
try:
if not FILESYSTEM_ENABLED:
return "文件系统未启用", 403
full_path = safe_path_join(HTML_ROOT_DIR, path)
if full_path is None:
return "无效的路径", 403
if not os.path.exists(full_path):
return "路径不存在", 404
# 文件处理
if os.path.isfile(full_path):
if request.args.get('download') == 'true':
return send_file(full_path, as_attachment=True, download_name=os.path.basename(full_path))
if is_video_file(full_path) or is_audio_file(full_path):
return send_file(full_path, mimetype=get_media_mime_type(full_path))
# 普通文件
with open(full_path, 'rb') as f:
content = f.read()
ext = os.path.splitext(full_path)[1].lower()
mime_map = {
'.html': 'text/html', '.js': 'application/javascript', '.css': 'text/css',
'.json': 'application/json', '.png': 'image/png', '.jpg': 'image/jpeg',
'.jpeg': 'image/jpeg', '.gif': 'image/gif', '.txt': 'text/plain',
'.pdf': 'application/pdf', '.svg': 'image/svg+xml', '.ico': 'image/x-icon'
}
return Response(content, mimetype=mime_map.get(ext, 'application/octet-stream'))
# 目录处理:返回 __view.html,由前端 JS 根据 URL 路径调用 /api/filelist 拉取文件列表
view_path = os.path.join(HTML_ROOT_DIR, VIEW_FILE)
if os.path.exists(view_path):
return send_file(view_path, mimetype='text/html')
return "目录无法浏览", 404
except Exception as e:
logger.error(f"Error: {str(e)}")
logs.error("static", f"静态文件服务错误: {str(e)}",
extra={"path": path})
import traceback
traceback.print_exc()
return f"服务器内部错误: {str(e)}", 500
@app.route('/health', methods=['GET'])
def health_check():
return jsonify({"status": "ok"})
if __name__ == '__main__':
host = file_config['server']['host']
port = int(file_config['server']['port'])
print("\n" + "="*50)
print("📁 文件托管服务器 (极简版)")
print("="*50)
print(f"地址: http://{host}:{port}")
print(f"目录: {os.path.abspath(HTML_ROOT_DIR) if FILESYSTEM_ENABLED else '未启用'}")
print("="*50)
print("\n快捷键: / 或 Ctrl+F 搜索, ESC 清空搜索")
print("\n")
if SSL_ENABLED and os.path.exists(SSL_CERT_FILE) and os.path.exists(SSL_KEY_FILE):
# Waitress 不支持 TLS,SSL 场景回退到 Flask 内置服务器
logger.warning("SSL enabled: falling back to Flask built-in server (Waitress has no TLS support)")
app.run(host=host, port=port, ssl_context=(SSL_CERT_FILE, SSL_KEY_FILE), debug=False)
else:
from waitress import serve
serve(app, host=host, port=port, threads=8)