371 lines
15 KiB
Python
371 lines
15 KiB
Python
import logging
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from fastapi import APIRouter, Depends, HTTPException, Request
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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logger = logging.getLogger("payment")
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from app.dependencies import get_db, get_current_user
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from app.models.user import User
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from app.models.payment_order import PaymentOrder
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from app.models.recharge_package import RechargePackage
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from app.schemas.payment import RechargeRequest, PaymentOrderOut
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from app.services.payment import (
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create_recharge_order,
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verify_wechat_callback,
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verify_alipay_callback,
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process_payment_success_by_order_no,
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process_refund,
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_get_payment_configs,
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_close_alipay_order,
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_get_order_expire_seconds,
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)
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router = APIRouter(prefix="/payments", tags=["payments"])
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@router.get("/methods")
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async def get_payment_methods(
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current_user: User = Depends(get_current_user),
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db: AsyncSession = Depends(get_db)
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):
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"""Return which payment methods are enabled (from admin config)."""
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from app.services.payment import _get_payment_configs
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configs = await _get_payment_configs(db)
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return {
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"alipay": configs.get("payment_alipay_enabled", "").lower() == "true",
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"wechat": configs.get("payment_wechat_enabled", "").lower() == "true",
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}
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@router.post("/recharge", response_model=PaymentOrderOut)
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async def recharge(
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req: RechargeRequest,
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current_user: User = Depends(get_current_user),
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db: AsyncSession = Depends(get_db),
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):
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if req.method not in ("wechat", "alipay"):
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raise HTTPException(status_code=400, detail="不支持的支付方式")
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# Check if the selected payment method is enabled in admin config
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from app.services.payment import _get_payment_configs, _is_mock_mode
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configs = await _get_payment_configs(db)
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if not _is_mock_mode(configs):
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enabled_key = f"payment_{req.method}_enabled"
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if configs.get(enabled_key, "").lower() != "true":
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raise HTTPException(status_code=400, detail="该支付方式未启用")
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result = await db.execute(
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select(RechargePackage).where(
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RechargePackage.id == req.plan,
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RechargePackage.is_active == True,
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)
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.limit(1)
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)
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pkg = result.scalar_one_or_none()
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if not pkg:
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raise HTTPException(status_code=400, detail="无效的套餐")
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try:
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order = await create_recharge_order(
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db,
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current_user.id,
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credits=pkg.credits,
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price=pkg.price,
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label=pkg.name,
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bonus_credits=pkg.bonus_credits,
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method=req.method,
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)
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except ValueError as e:
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raise HTTPException(status_code=400, detail=str(e))
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return order
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@router.post("/wechat/callback")
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async def wechat_callback(request: Request, db: AsyncSession = Depends(get_db)):
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# 读取微信支付回调数据
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body_bytes = await request.body()
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body_str = body_bytes.decode("utf-8")
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# 获取配置
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from app.services.payment import _get_payment_configs, _is_mock_mode, _get_wechat_client
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db_configs = await _get_payment_configs(db)
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# 检查 mock 模式
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if _is_mock_mode(db_configs):
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try:
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import json
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data = json.loads(body_str) if body_str else {}
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order_no = data.get("out_trade_no")
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if order_no:
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await process_payment_success_by_order_no(db, order_no)
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logger.info(f"Mock WeChat callback processed: order_no={order_no}")
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return {"code": "SUCCESS", "message": "OK"}
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except Exception as e:
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logger.exception(f"Mock WeChat callback error: {e}")
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return {"code": "SUCCESS", "message": "OK"} # 微信要求即使处理失败也返回成功
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# 真实模式：使用 wechatpayv3 SDK 工具验证回调并解析数据
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try:
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from wechatpayv3.utils import (
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rsa_verify, load_public_key, sha256, b64decode,
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AESGCM, InvalidTag
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)
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mch_id = db_configs.get("payment_wechat_mch_id", "")
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api_v3_key = db_configs.get("payment_wechat_api_v3_key", "")
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public_key = db_configs.get("payment_wechat_public_key", "")
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if not all([mch_id, api_v3_key]):
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logger.error("WeChat payment config missing for callback")
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return {"code": "SUCCESS", "message": "OK"}
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# 从请求头获取必要信息（不区分大小写）
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headers = {k.lower(): v for k, v in dict(request.headers).items()}
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timestamp = headers.get("wechatpay-timestamp", "")
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nonce = headers.get("wechatpay-nonce", "")
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signature = headers.get("wechatpay-signature", "")
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serial_no = headers.get("wechatpay-serial", "")
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# 验证签名：使用平台公钥验证
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if public_key and serial_no:
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try:
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# 构造签名串：timestamp + "\n" + nonce + "\n" + body + "\n"
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# 符合微信支付官方文档规范：https://pay.weixin.qq.com/doc/v3/merchant/4013053249
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is_verified = rsa_verify(
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timestamp=timestamp,
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nonce=nonce,
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body=body_str,
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signature=signature,
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public_key=load_public_key(public_key)
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)
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if not is_verified:
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logger.warning(f"WeChat callback signature verification failed: serial={serial_no}")
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raise HTTPException(status_code=400, detail="签名验证失败")
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except Exception as e:
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logger.warning(f"WeChat signature verification error: {e}, serial={serial_no}")
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raise HTTPException(status_code=400, detail="签名验证失败")
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else:
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if not public_key:
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logger.warning("WeChat platform public key not configured, skipping signature verification")
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if not serial_no:
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logger.warning("Wechatpay-Serial header missing, skipping signature verification")
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# 解密回调数据：使用 API v3 key
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# 官方文档：https://pay.weixin.qq.com/doc/v3/merchant/4012071382
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import json
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body_data = json.loads(body_str) if body_str else {}
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resource = body_data.get("resource", {})
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if not resource:
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logger.error("WeChat callback resource not found")
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raise HTTPException(status_code=400, detail="数据格式错误")
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# 验证加密算法（官方文档要求固定为 AEAD_AES_256_GCM）
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algorithm = resource.get("algorithm", "")
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if algorithm != "AEAD_AES_256_GCM":
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logger.error(f"WeChat callback unsupported algorithm: {algorithm}")
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raise HTTPException(status_code=400, detail="不支持的加密算法")
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ciphertext = resource.get("ciphertext", "")
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associated_data = resource.get("associated_data", "")
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nonce_str = resource.get("nonce", "")
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# 参数验证
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if not ciphertext:
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logger.error("WeChat callback ciphertext is empty")
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raise HTTPException(status_code=400, detail="密文为空")
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if not nonce_str:
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logger.error("WeChat callback nonce is empty")
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raise HTTPException(status_code=400, detail="随机数为空")
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# 使用 AES-GCM 解密（符合官方文档规范）
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# 官方文档：https://pay.weixin.qq.com/doc/v3/merchant/4012071382
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try:
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# API v3 key 需要转换为字节串
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api_v3_key_bytes = api_v3_key.encode('utf-8')
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# ciphertext 是 Base64 编码的，需要解码
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ciphertext_bytes = b64decode(ciphertext)
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# nonce 直接使用字符串编码（官方文档方式）
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nonce_bytes = nonce_str.encode('utf-8')
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# associated_data 是字符串，直接编码
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associated_data_bytes = associated_data.encode('utf-8') if associated_data else b''
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aesgcm = AESGCM(api_v3_key_bytes)
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decrypted_str = aesgcm.decrypt(nonce_bytes, ciphertext_bytes, associated_data_bytes)
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except InvalidTag:
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logger.error("WeChat callback decryption failed: Invalid tag (key or data mismatch)")
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raise HTTPException(status_code=400, detail="数据解密失败（密钥或数据不匹配）")
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except Exception as e:
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logger.error(f"WeChat callback decryption failed: {e}")
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raise HTTPException(status_code=400, detail="数据解密失败")
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if not decrypted_str:
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logger.error("WeChat callback decryption returned empty")
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raise HTTPException(status_code=400, detail="数据解密失败")
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decrypted_data = json.loads(decrypted_str)
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event_type = body_data.get("event_type", "")
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# 处理支付成功回调
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if event_type == "TRANSACTION.SUCCESS":
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order_no = decrypted_data.get("out_trade_no", "")
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transaction_id = decrypted_data.get("transaction_id", "")
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amount_info = decrypted_data.get("amount", {})
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total_amount = amount_info.get("total", 0) / 100 # 转换为元
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if order_no:
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await process_payment_success_by_order_no(db, order_no, transaction_id, total_amount)
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logger.info(
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f"WeChat callback processed: order_no={order_no}, "
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f"transaction_id={transaction_id}, amount={total_amount}"
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)
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# 处理退款回调
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elif event_type == "REFUND.SUCCESS":
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order_no = decrypted_data.get("out_trade_no", "")
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refund_id = decrypted_data.get("refund_id", "")
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refund_status = decrypted_data.get("status", "")
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if order_no and refund_status == "SUCCESS":
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# 更新订单状态为已退款
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from app.models import PaymentOrder
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from sqlalchemy import select
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result = await db.execute(select(PaymentOrder).where(PaymentOrder.order_no == order_no))
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order = result.scalar_one_or_none()
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if order and order.status == "refunding":
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order.status = "refunded"
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order.transaction_id = refund_id
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await db.commit()
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logger.info(
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f"WeChat refund callback processed: order_no={order_no}, "
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f"refund_id={refund_id}, status={refund_status}"
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)
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return {"code": "SUCCESS", "message": "OK"}
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except Exception as e:
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logger.exception(f"WeChat callback processing error: {e}")
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# 微信支付要求即使处理失败也返回成功，避免重复回调
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return {"code": "SUCCESS", "message": "OK"}
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@router.post("/alipay/callback")
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async def alipay_callback(request: Request, db: AsyncSession = Depends(get_db)):
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form_data = await request.form()
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data = dict(form_data)
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logger.info(
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f"ALIPAY_CALLBACK order_no={data.get('out_trade_no')} "
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f"data={data}"
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)
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# Verify signature first
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if not await verify_alipay_callback(data, db):
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raise HTTPException(status_code=400, detail="签名验证失败")
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# Check trade_status – only "TRADE_SUCCESS" and "TRADE_FINISHED" mean paid
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trade_status = data.get("trade_status", "")
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if trade_status not in ("TRADE_SUCCESS", "TRADE_FINISHED"):
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logger.info(f"Alipay callback trade_status={trade_status}, ignoring")
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return "success"
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order_no = data.get("out_trade_no")
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trade_no = data.get("trade_no", "")
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total_amount_str = data.get("total_amount", "")
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total_amount = float(total_amount_str) if total_amount_str else None
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if order_no:
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await process_payment_success_by_order_no(db, order_no, trade_no, total_amount)
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return "success"
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@router.get("/orders", response_model=list[PaymentOrderOut])
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async def list_orders(
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current_user: User = Depends(get_current_user),
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db: AsyncSession = Depends(get_db),
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):
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# Auto-expire stale pending orders before returning
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from app.services.payment import _check_and_expire_order
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result = await db.execute(
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select(PaymentOrder)
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.where(PaymentOrder.user_id == current_user.id)
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.order_by(PaymentOrder.created_at.desc())
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)
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orders = result.scalars().all()
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for o in orders:
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await _check_and_expire_order(db, o)
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return orders
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@router.get("/orders/{order_no}", response_model=PaymentOrderOut)
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async def get_order(
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order_no: str,
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current_user: User = Depends(get_current_user),
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db: AsyncSession = Depends(get_db),
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):
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from app.services.payment import _check_and_expire_order
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result = await db.execute(
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select(PaymentOrder)
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.where(
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PaymentOrder.order_no == order_no,
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PaymentOrder.user_id == current_user.id,
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)
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.limit(1)
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)
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order = result.scalar_one_or_none()
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if not order:
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raise HTTPException(status_code=404, detail="订单不存在")
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# Auto-expire if needed
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await _check_and_expire_order(db, order)
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return order
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@router.post("/orders/{order_no}/cancel")
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async def cancel_order(
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order_no: str,
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current_user: User = Depends(get_current_user),
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db: AsyncSession = Depends(get_db),
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):
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"""Cancel a pending order. Only the order owner can cancel, only if still pending."""
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result = await db.execute(
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select(PaymentOrder).where(
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PaymentOrder.order_no == order_no,
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PaymentOrder.user_id == current_user.id,
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).limit(1)
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)
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order = result.scalar_one_or_none()
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if not order:
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raise HTTPException(status_code=404, detail="订单不存在")
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if order.status != "pending":
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raise HTTPException(status_code=400, detail=f"订单状态为{order.status}，无法取消")
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# If it's an Alipay or WeChat order, call close API first
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db_configs = await _get_payment_configs(db)
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if order.payment_method == "alipay":
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try:
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await _close_alipay_order(db, order, db_configs)
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except Exception as e:
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logger.exception(f"Failed to close Alipay order {order_no}: {e}")
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elif order.payment_method == "wechat":
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try:
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from app.services.payment import _close_wechat_order
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await _close_wechat_order(db, order, db_configs)
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except Exception as e:
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logger.exception(f"Failed to close WeChat order {order_no}: {e}")
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order.status = "cancelled"
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await db.flush()
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logger.info(
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f"ORDER_CANCELLED order_no={order_no} user={current_user.id} amount={order.amount}"
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)
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return {"ok": True}
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