125 lines
3.8 KiB
Python
125 lines
3.8 KiB
Python
"""持久化配置管理
|
||
|
||
使用 data/settings.json 存储可通过管理面板修改的设置：
|
||
- proxy_target_url / proxy_api_key: 可覆盖环境变量的全局配置
|
||
- model_mappings: Cursor 模型名 → {upstream_model, backend, target_url, api_key, custom_instructions}
|
||
"""
|
||
|
||
import copy
|
||
import json
|
||
import os
|
||
import threading
|
||
|
||
from config import Config
|
||
|
||
_ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
|
||
DATA_DIR = os.path.join(_ROOT_DIR, 'data')
|
||
SETTINGS_FILE = os.path.join(DATA_DIR, 'settings.json')
|
||
|
||
_lock = threading.Lock()
|
||
_cache = None
|
||
|
||
_DEFAULTS = {
|
||
'proxy_target_url': '',
|
||
'proxy_api_key': '',
|
||
'model_mappings': {},
|
||
}
|
||
|
||
|
||
def load():
|
||
"""从持久化文件读取配置并刷新内存缓存。
|
||
|
||
如果配置文件不存在或内容损坏，会回退到默认值，保证服务仍然可以正常启动。
|
||
"""
|
||
global _cache
|
||
with _lock:
|
||
if os.path.exists(SETTINGS_FILE):
|
||
try:
|
||
with open(SETTINGS_FILE, 'r', encoding='utf-8') as f:
|
||
_cache = {**_DEFAULTS, **json.load(f)}
|
||
except (json.JSONDecodeError, OSError):
|
||
_cache = copy.deepcopy(_DEFAULTS)
|
||
else:
|
||
_cache = copy.deepcopy(_DEFAULTS)
|
||
return copy.deepcopy(_cache)
|
||
|
||
|
||
def save(data):
|
||
"""将当前配置写回到持久化文件并同步缓存。
|
||
|
||
保存前会确保数据目录存在，并始终以默认配置为基底合并缺失字段。
|
||
"""
|
||
global _cache
|
||
with _lock:
|
||
os.makedirs(DATA_DIR, exist_ok=True)
|
||
_cache = {**_DEFAULTS, **data}
|
||
with open(SETTINGS_FILE, 'w', encoding='utf-8') as f:
|
||
json.dump(_cache, f, ensure_ascii=False, indent=2)
|
||
|
||
|
||
def get():
|
||
"""获取当前配置的深拷贝快照，保证调用方修改不影响缓存。"""
|
||
with _lock:
|
||
if _cache is None:
|
||
pass
|
||
else:
|
||
return copy.deepcopy(_cache)
|
||
return load()
|
||
|
||
|
||
def get_url():
|
||
"""获取当前生效的上游 URL，优先使用持久化配置。"""
|
||
return get().get('proxy_target_url') or Config.PROXY_TARGET_URL
|
||
|
||
|
||
def get_key():
|
||
"""获取当前生效的 API 密钥，优先使用持久化配置。"""
|
||
return get().get('proxy_api_key') or Config.PROXY_API_KEY
|
||
|
||
|
||
def resolve_model(model_name):
|
||
"""解析模型映射并返回完整的上游路由信息。"""
|
||
settings = get()
|
||
mappings = settings.get('model_mappings', {})
|
||
base_url, base_key = get_url(), get_key()
|
||
|
||
if model_name in mappings:
|
||
m = mappings[model_name]
|
||
backend = m.get('backend')
|
||
if backend in ('', None, 'auto'):
|
||
backend = _auto_detect(model_name)
|
||
return {
|
||
'upstream_model': m.get('upstream_model') or model_name,
|
||
'backend': backend,
|
||
'target_url': m.get('target_url') or base_url,
|
||
'api_key': m.get('api_key') or base_key,
|
||
'custom_instructions': m.get('custom_instructions') or '',
|
||
'instructions_position': m.get('instructions_position') or 'prepend',
|
||
'body_modifications': m.get('body_modifications') or {},
|
||
'header_modifications': m.get('header_modifications') or {},
|
||
}
|
||
|
||
return {
|
||
'upstream_model': model_name,
|
||
'backend': _auto_detect(model_name),
|
||
'target_url': base_url,
|
||
'api_key': base_key,
|
||
'custom_instructions': '',
|
||
'instructions_position': 'prepend',
|
||
'body_modifications': {},
|
||
'header_modifications': {},
|
||
}
|
||
|
||
|
||
def _auto_detect(name):
|
||
"""根据模型名关键字推断默认后端协议类型。
|
||
|
||
当前规则较为保守：命中 `claude` 或 `anthropic` 走 Anthropic，
|
||
其余模型默认视为 OpenAI 兼容后端。
|
||
"""
|
||
lower = (name or '').lower()
|
||
if 'claude' in lower or 'anthropic' in lower:
|
||
return 'anthropic'
|
||
if 'gemini' in lower:
|
||
return 'gemini'
|
||
return 'openai'
|