320 lines
13 KiB
Python
320 lines
13 KiB
Python
"""鱼翅直充供应商 API 客户端。"""
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from __future__ import annotations
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import hashlib
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import json
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import os
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import time
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from dataclasses import dataclass
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from decimal import Decimal, InvalidOperation
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from typing import Any, Callable, Mapping
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import requests
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class FishFinRechargeError(RuntimeError):
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"""鱼翅直充供应商接口调用失败。"""
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class FishFinRechargeConfigError(FishFinRechargeError):
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"""鱼翅直充供应商配置不完整。"""
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@dataclass(frozen=True)
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class FishFinRechargeConfig:
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"""供应商接入配置；敏感值仅从运行环境读取。"""
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base_url: str
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app_id: str
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app_secret: str
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app_key: str = ""
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notify_url: str = ""
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timeout: tuple[float, float] = (8, 20)
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debug: bool = False
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@classmethod
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def from_env(cls) -> "FishFinRechargeConfig":
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"""从环境变量读取配置，不在代码或数据库中保存商户密钥。"""
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timeout = float(os.getenv("FISH_FIN_RECHARGE_TIMEOUT", "20"))
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return cls(
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base_url=os.getenv("FISH_FIN_RECHARGE_BASE_URL", "").strip(),
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app_id=os.getenv("FISH_FIN_RECHARGE_APP_ID", "").strip(),
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app_secret=os.getenv("FISH_FIN_RECHARGE_APP_SECRET", "").strip(),
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app_key=os.getenv("FISH_FIN_RECHARGE_APP_KEY", "").strip(),
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notify_url=os.getenv("FISH_FIN_RECHARGE_NOTIFY_URL", "").strip(),
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timeout=(8, timeout),
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debug=os.getenv("FISH_FIN_RECHARGE_DEBUG", "false").strip().lower()
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in {"1", "true", "yes"},
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)
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def validate(self) -> None:
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"""在实际发起请求前校验必要配置。"""
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missing = [
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name
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for name, value in (
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("FISH_FIN_RECHARGE_BASE_URL", self.base_url),
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("FISH_FIN_RECHARGE_APP_ID", self.app_id),
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("FISH_FIN_RECHARGE_APP_SECRET", self.app_secret),
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)
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if not value
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]
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if missing:
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raise FishFinRechargeConfigError(f"缺少鱼翅直充配置: {', '.join(missing)}")
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class FishFinRechargeClient:
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"""实现供应商 createOrderV2、queryOrderV2 与 userInfoV2 协议。"""
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CREATE_ORDER_PATH = "/adapter-apiaccess/open/api/createOrderV2"
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QUERY_ORDER_PATH = "/adapter-apiaccess/open/api/queryOrderV2"
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USER_INFO_PATH = "/adapter-apiaccess/open/api/userInfoV2"
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def __init__(
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self,
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config: FishFinRechargeConfig,
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*,
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session: requests.Session | None = None,
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trace: Callable[[dict[str, Any]], None] | None = None,
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):
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config.validate()
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self.config = config
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self.session = session or requests.Session()
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self.session.trust_env = False
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self.trace = trace or (lambda _event: None)
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@staticmethod
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def _sign_value(value: Any) -> str:
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"""将参数转为待签名文本；对象按稳定紧凑 JSON 表示。"""
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if isinstance(value, (dict, list, tuple)):
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return json.dumps(
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value, ensure_ascii=False, separators=(",", ":"), sort_keys=True
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)
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if isinstance(value, bool):
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return "true" if value else "false"
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return str(value)
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@classmethod
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def normalized_params(cls, params: Mapping[str, Any]) -> dict[str, str]:
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"""按供应商规则去除首尾空白与空值，保留可签名参数。"""
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normalized: dict[str, str] = {}
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for raw_key, raw_value in params.items():
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key = str(raw_key).strip()
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if not key or key == "sign" or raw_value is None:
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continue
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value = cls._sign_value(raw_value).strip()
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if value:
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normalized[key] = value
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return normalized
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def sign(self, params: Mapping[str, Any], method: str) -> str:
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"""生成小写 MD5 签名。"""
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normalized = self.normalized_params(params)
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query = "&".join(f"{key}={normalized[key]}" for key in sorted(normalized))
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raw = f"{query}{method.upper()}{self.config.app_secret}"
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return hashlib.md5(raw.encode("utf-8")).hexdigest()
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@staticmethod
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def _json_text(value: Any) -> str:
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"""生成单行 JSON 调试文本，避免日志被控制字符截断。"""
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return json.dumps(value, ensure_ascii=False, separators=(",", ":"), default=str)
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@classmethod
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def _debug_payload(cls, payload: Mapping[str, Any]) -> dict[str, Any]:
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"""调试记录只保留协议字段，签名值和密钥相关内容统一脱敏。"""
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safe = dict(payload)
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if "sign" in safe:
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safe["sign"] = "<redacted>"
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return safe
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@staticmethod
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def _response_value(payload: Mapping[str, Any], *keys: str) -> Any:
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"""兼容供应商将订单字段放在根节点、data 或 result 节点。"""
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sources = [payload]
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for key in ("data", "result"):
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value = payload.get(key)
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if isinstance(value, Mapping):
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sources.append(value)
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for source in sources:
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for key in keys:
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if source.get(key) is not None:
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return source[key]
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return None
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def verify_response_sign(self, payload: Mapping[str, Any], method: str) -> bool:
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"""校验带 sign 的响应；供应商未返回 sign 时由调用方决定是否接受。"""
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received = str(payload.get("sign") or "").strip().lower()
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return bool(received) and received == self.sign(payload, method)
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def _request(
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self, method: str, path: str, params: Mapping[str, Any] | None = None
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) -> dict[str, Any]:
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"""补齐公共参数、签名并执行一次 JSON 请求。"""
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request_params: dict[str, Any] = {
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"app_id": self.config.app_id,
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"timestamp": int(time.time()),
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**(params or {}),
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}
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request_params["sign"] = self.sign(request_params, method)
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url = f"{self.config.base_url.rstrip('/')}{path}"
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trace_event = {
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"stage": "request",
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"method": method.upper(),
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"path": path,
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"params": {
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key: value
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for key, value in request_params.items()
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if key not in {"sign", "recharge_arg", "ext_arg"}
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},
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"parameter_types": {
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key: type(value).__name__
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for key, value in request_params.items()
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if key != "sign"
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},
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# 只记录摘要，便于关联排查而不暴露可重放的签名。
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"sign_digest": hashlib.sha256(
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request_params["sign"].encode("utf-8")
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).hexdigest()[:12],
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}
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if self.config.debug:
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sign_params = self.normalized_params(request_params)
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sign_query = "&".join(
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f"{key}={sign_params[key]}" for key in sorted(sign_params)
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)
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trace_event.update(
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{
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"url": url,
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"content_type": "application/json",
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"json_body": self._debug_payload(request_params),
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"sign_params": sign_params,
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# 不把可重放签名原文或 AppSecret 写入日志，只记录待签名串摘要。
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"sign_source_digest": hashlib.sha256(
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f"{sign_query}{method.upper()}".encode("utf-8")
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).hexdigest()[:12],
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}
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)
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self.trace(trace_event)
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try:
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if method.upper() == "GET":
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response = self.session.get(
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url, params=request_params, timeout=self.config.timeout
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)
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else:
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response = self.session.post(
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url, json=request_params, timeout=self.config.timeout
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)
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response.raise_for_status()
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payload = response.json()
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except requests.RequestException as exc:
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raise FishFinRechargeError(f"供应商请求失败: {exc}") from exc
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except ValueError as exc:
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raise FishFinRechargeError("供应商响应不是 JSON") from exc
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if not isinstance(payload, dict):
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raise FishFinRechargeError("供应商响应格式无效")
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trace_event = {
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"stage": "response",
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"method": method.upper(),
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"path": path,
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"http_status": response.status_code,
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"code": payload.get("code"),
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"message": payload.get("msg") or payload.get("message") or "",
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"out_order_id": self._response_value(payload, "out_order_id", "outOrderId"),
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"order_id": self._response_value(payload, "order_id", "orderId"),
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"order_status": self._response_value(
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payload, "order_status", "orderStatus"
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),
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"fail_reason": self._response_value(payload, "fail_reason", "failReason"),
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}
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if self.config.debug:
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trace_event.update(
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{
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"response_headers": {
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key: value
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for key, value in response.headers.items()
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if key.lower() in {"content-type", "x-request-id", "request-id"}
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},
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"response_body": self._debug_payload(payload),
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}
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)
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self.trace(trace_event)
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return payload
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@staticmethod
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def _amount(value: Decimal | int | float | str) -> str:
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"""规范化金额，避免浮点数表达式进入签名或订单请求。"""
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try:
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price = Decimal(str(value))
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except (InvalidOperation, ValueError) as exc:
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raise ValueError("pay_amount 必须是有效金额") from exc
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if not price.is_finite() or price <= 0:
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raise ValueError("pay_amount 必须大于 0")
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return format(price.normalize(), "f")
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@classmethod
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def _json_amount(cls, value: Decimal | int | float | str) -> int | float:
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"""按文档以 JSON 数字发送金额，整数不附带无意义的小数位。"""
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amount_text = cls._amount(value)
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return int(amount_text) if "." not in amount_text else float(amount_text)
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@staticmethod
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def _json_argument(value: list[dict[str, Any]] | dict[str, Any], field: str) -> str:
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"""将供应商规定的扩展参数编码为紧凑 JSON 字符串。"""
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if not value:
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raise ValueError(f"{field} 不能为空")
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return json.dumps(value, ensure_ascii=False, separators=(",", ":"))
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def create_order(
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self,
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*,
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buy_num: int,
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pay_amount: Decimal | int | float | str,
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out_order_id: str,
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product_id: str,
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recharge_arg: list[dict[str, Any]],
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order_type: int = 0,
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notify_url: str = "",
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ext_arg: dict[str, Any] | None = None,
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) -> dict[str, Any]:
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"""创建直充订单；成功后应使用 query_order 或供应商回调确认最终状态。"""
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if not str(out_order_id).strip():
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raise ValueError("out_order_id 不能为空")
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if not str(product_id).strip():
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raise ValueError("product_id 不能为空")
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if not isinstance(buy_num, int) or isinstance(buy_num, bool) or buy_num < 1:
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raise ValueError("buy_num 必须是不小于 1 的整数")
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if (
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not isinstance(order_type, int)
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or isinstance(order_type, bool)
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or order_type not in {0, 1, 2, 3}
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):
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raise ValueError("order_type 必须是 0 至 3 的整数")
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if not isinstance(recharge_arg, list) or not recharge_arg:
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raise ValueError("recharge_arg 必须是非空数组")
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params: dict[str, Any] = {
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"buy_num": buy_num,
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"pay_amount": self._json_amount(pay_amount),
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"out_order_id": str(out_order_id).strip(),
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"product_id": str(product_id).strip(),
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"order_type": order_type,
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"recharge_arg": self._json_argument(recharge_arg, "recharge_arg"),
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}
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# 文档规定可选参数未特别约定时默认不传，不能以空值或内部字段占位。
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if str(notify_url).strip():
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params["notify_url"] = str(notify_url).strip()
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if ext_arg:
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params["ext_arg"] = self._json_argument(ext_arg, "ext_arg")
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return self._request("POST", self.CREATE_ORDER_PATH, params)
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def query_order(self, out_order_id: str) -> dict[str, Any]:
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"""按新版文档使用来源/外部订单号查询订单。"""
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out_order_id = str(out_order_id).strip()
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if not out_order_id:
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raise ValueError("out_order_id 不能为空")
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return self._request(
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"GET", self.QUERY_ORDER_PATH, {"out_order_id": out_order_id}
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)
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def account_info(self) -> dict[str, Any]:
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"""查询商户账户信息。"""
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return self._request("GET", self.USER_INFO_PATH)
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