261 lines
11 KiB
Python
261 lines
11 KiB
Python
"""
|
||
微信支付 API v3 封装（从 payment 迁入 app）
|
||
"""
|
||
|
||
import json
|
||
from app.core.logging import get_logger
|
||
import os
|
||
import time
|
||
from typing import Dict
|
||
|
||
from app.features.payment.payment_config import WeChatPayConfig
|
||
from app.features.payment.schemas import NotifyResult, PaymentResult, PaymentStatus
|
||
from app.features.payment.payment_exceptions import (
|
||
PaymentConfigError,
|
||
PaymentCreateError,
|
||
PaymentNotifyError,
|
||
PaymentQueryError,
|
||
)
|
||
|
||
logger = get_logger(__name__)
|
||
|
||
|
||
def _normalize_pem_key(key: str) -> str:
|
||
if not key or not key.strip():
|
||
return key
|
||
key = key.strip().lstrip("\ufeff").strip('"').strip("'")
|
||
key = key.replace("\\n", "\n")
|
||
key = key.replace("\r\n", "\n").replace("\r", "\n")
|
||
return key
|
||
|
||
|
||
def _resolve_key_path(key_path: str) -> str:
|
||
if not key_path or not key_path.strip():
|
||
return key_path
|
||
key_path = key_path.strip()
|
||
if os.path.isabs(key_path):
|
||
return key_path
|
||
abs_cwd = os.path.abspath(key_path)
|
||
if os.path.isfile(abs_cwd):
|
||
return abs_cwd
|
||
try:
|
||
# app/features/payment/wechat_client.py -> api/
|
||
api_dir = os.path.dirname(
|
||
os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
|
||
)
|
||
abs_api = os.path.normpath(os.path.join(api_dir, key_path))
|
||
if os.path.isfile(abs_api):
|
||
return abs_api
|
||
except Exception:
|
||
pass
|
||
return abs_cwd
|
||
|
||
|
||
class WeChatPayClient:
|
||
def __init__(self, config: WeChatPayConfig):
|
||
self._config = config
|
||
self._client = None
|
||
|
||
def ensure_client(self):
|
||
self._ensure_client()
|
||
|
||
def _ensure_client(self):
|
||
if not self._config.is_configured:
|
||
raise PaymentConfigError("微信支付配置不完整，请检查环境变量")
|
||
if self._client is None:
|
||
try:
|
||
from wechatpayv3 import WeChatPay, WeChatPayType
|
||
|
||
if (
|
||
self._config.private_key_path
|
||
and self._config.private_key_path.strip()
|
||
):
|
||
key_path = _resolve_key_path(self._config.private_key_path)
|
||
with open(key_path, "r", encoding="utf-8") as f:
|
||
private_key = f.read()
|
||
elif self._config.private_key and self._config.private_key.strip():
|
||
private_key = self._config.private_key.strip()
|
||
else:
|
||
raise PaymentConfigError(
|
||
"未配置微信支付商户私钥：请设置 WECHAT_PAY_PRIVATE_KEY_PATH 或 WECHAT_PAY_PRIVATE_KEY"
|
||
)
|
||
private_key = _normalize_pem_key(private_key)
|
||
if not private_key or "-----BEGIN" not in private_key:
|
||
raise PaymentConfigError(
|
||
"微信支付商户私钥格式错误：需为 PEM 格式。"
|
||
)
|
||
kwargs = dict(
|
||
wechatpay_type=WeChatPayType.APP,
|
||
mchid=self._config.mch_id,
|
||
private_key=private_key,
|
||
cert_serial_no=self._config.cert_serial_no,
|
||
appid=self._config.app_id,
|
||
apiv3_key=self._config.api_v3_key,
|
||
notify_url=self._config.notify_url,
|
||
)
|
||
if self._config.use_platform_public_key:
|
||
if (
|
||
self._config.platform_public_key_path
|
||
and self._config.platform_public_key_path.strip()
|
||
):
|
||
key_path = _resolve_key_path(
|
||
self._config.platform_public_key_path
|
||
)
|
||
with open(key_path, "r", encoding="utf-8") as f:
|
||
platform_pub_key = _normalize_pem_key(f.read())
|
||
elif (
|
||
self._config.platform_public_key
|
||
and self._config.platform_public_key.strip()
|
||
):
|
||
platform_pub_key = _normalize_pem_key(
|
||
self._config.platform_public_key.strip()
|
||
)
|
||
else:
|
||
raise PaymentConfigError(
|
||
"平台公钥模式需设置 WECHAT_PAY_PLATFORM_PUBLIC_KEY 或 WECHAT_PAY_PLATFORM_PUBLIC_KEY_PATH"
|
||
)
|
||
if not platform_pub_key or "-----BEGIN" not in platform_pub_key:
|
||
raise PaymentConfigError(
|
||
"微信支付平台公钥格式错误，需为 PEM 格式"
|
||
)
|
||
kwargs["public_key"] = platform_pub_key
|
||
kwargs["public_key_id"] = (
|
||
self._config.platform_public_key_id.strip()
|
||
)
|
||
else:
|
||
kwargs["timeout"] = (10, 25)
|
||
self._client = WeChatPay(**kwargs)
|
||
logger.info("微信支付客户端初始化成功")
|
||
except FileNotFoundError:
|
||
key_path = (
|
||
_resolve_key_path(self._config.private_key_path)
|
||
if self._config.private_key_path
|
||
else self._config.private_key_path
|
||
)
|
||
raise PaymentConfigError(f"微信支付商户私钥文件不存在: {key_path}")
|
||
except PaymentConfigError:
|
||
raise
|
||
except Exception as e:
|
||
msg = str(e).strip()
|
||
if "platform certificate" in msg.lower():
|
||
raise PaymentConfigError(
|
||
"无法获取微信支付平台证书。请改用平台公钥模式：设置 "
|
||
"WECHAT_PAY_PLATFORM_PUBLIC_KEY 与 WECHAT_PAY_PLATFORM_PUBLIC_KEY_ID。"
|
||
)
|
||
raise PaymentConfigError(f"微信支付客户端初始化失败: {e}")
|
||
|
||
def create_app_order(
|
||
self,
|
||
out_trade_no: str,
|
||
total_amount: int,
|
||
description: str,
|
||
) -> PaymentResult:
|
||
self._ensure_client()
|
||
try:
|
||
code, message = self._client.pay(
|
||
description=description,
|
||
out_trade_no=out_trade_no,
|
||
amount={"total": total_amount, "currency": "CNY"},
|
||
pay_type=self._get_pay_type(),
|
||
)
|
||
result = json.loads(message)
|
||
if code in range(200, 300):
|
||
prepay_id = result.get("prepay_id", "")
|
||
timestamp = str(int(time.time()))
|
||
nonce_str = out_trade_no
|
||
pay_params = self._client.sign(
|
||
data=[self._config.app_id, timestamp, nonce_str, prepay_id]
|
||
)
|
||
wechat_params = {
|
||
"appId": self._config.app_id,
|
||
"partnerId": self._config.mch_id,
|
||
"prepayId": prepay_id,
|
||
"nonceStr": nonce_str,
|
||
"timeStamp": timestamp,
|
||
"sign": pay_params,
|
||
"packageValue": "Sign=WXPay",
|
||
}
|
||
logger.info("微信支付预订单创建成功: %s", out_trade_no)
|
||
return PaymentResult(
|
||
success=True,
|
||
payment_method="wechat",
|
||
out_trade_no=out_trade_no,
|
||
wechat_params=wechat_params,
|
||
)
|
||
else:
|
||
error_msg = result.get("message", "未知错误")
|
||
raise PaymentCreateError(f"微信支付下单失败: {error_msg}")
|
||
except PaymentCreateError:
|
||
raise
|
||
except Exception as e:
|
||
logger.error("微信支付预订单创建异常: %s", e)
|
||
raise PaymentCreateError(f"微信支付下单异常: {e}")
|
||
|
||
def verify_notify(self, headers: Dict[str, str], body: str) -> NotifyResult:
|
||
self._ensure_client()
|
||
try:
|
||
result = self._client.callback(headers=headers, body=body)
|
||
if result:
|
||
event_data = result if isinstance(result, dict) else json.loads(result)
|
||
trade_state = event_data.get("trade_state", "")
|
||
out_trade_no = event_data.get("out_trade_no", "")
|
||
transaction_id = event_data.get("transaction_id", "")
|
||
amount_info = event_data.get("amount", {})
|
||
total_amount = amount_info.get("total", 0)
|
||
return NotifyResult(
|
||
success=True,
|
||
out_trade_no=out_trade_no,
|
||
trade_no=transaction_id,
|
||
total_amount=total_amount,
|
||
trade_status=trade_state,
|
||
)
|
||
raise PaymentNotifyError("微信支付回调验签失败")
|
||
except PaymentNotifyError:
|
||
raise
|
||
except Exception as e:
|
||
logger.error("微信支付回调处理异常: %s", e)
|
||
raise PaymentNotifyError(f"微信支付回调处理失败: {e}")
|
||
|
||
def query_order(self, out_trade_no: str) -> PaymentStatus:
|
||
self._ensure_client()
|
||
try:
|
||
code, message = self._client.query(out_trade_no=out_trade_no)
|
||
result = json.loads(message)
|
||
if code in range(200, 300):
|
||
trade_state = result.get("trade_state", "NOTPAY")
|
||
transaction_id = result.get("transaction_id", "")
|
||
amount_info = result.get("amount", {})
|
||
total_amount = amount_info.get("total", 0)
|
||
return PaymentStatus(
|
||
success=True,
|
||
out_trade_no=out_trade_no,
|
||
trade_no=transaction_id,
|
||
trade_status=trade_state,
|
||
total_amount=total_amount,
|
||
)
|
||
error_msg = result.get("message", "未知错误")
|
||
raise PaymentQueryError(f"查询微信支付订单失败: {error_msg}")
|
||
except PaymentQueryError:
|
||
raise
|
||
except Exception as e:
|
||
logger.error("查询微信支付订单异常: %s", e)
|
||
raise PaymentQueryError(f"查询微信支付订单异常: {e}")
|
||
|
||
def close_order(self, out_trade_no: str) -> bool:
|
||
self._ensure_client()
|
||
try:
|
||
code, message = self._client.close(out_trade_no=out_trade_no)
|
||
if code in range(200, 300):
|
||
logger.info("微信支付订单已关闭: %s", out_trade_no)
|
||
return True
|
||
logger.warning("关闭微信支付订单失败: %s - %s", code, message)
|
||
return False
|
||
except Exception as e:
|
||
logger.error("关闭微信支付订单异常: %s", e)
|
||
return False
|
||
|
||
def _get_pay_type(self):
|
||
from wechatpayv3 import WeChatPayType
|
||
|
||
return WeChatPayType.APP
|