144 lines
5.9 KiB
Python
144 lines
5.9 KiB
Python
"""
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统一 HTTP 错误处理 & 退避重试模块
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使用方式：
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1. 对于 aiohttp 请求，用 async_request_with_retry() 包裹 POST/GET 调用
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2. 对于已拿到 status code 的场景，调用 raise_for_status() 抛出友好错误
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新增生图/视频节点时，请统一使用本模块处理 HTTP 错误。
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"""
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import asyncio
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import random
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from typing import Optional
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import aiohttp
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# ═══════════════════════════════════════════════════════════════════════════════
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# 状态码 → 用户友好文案
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# ═══════════════════════════════════════════════════════════════════════════════
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HTTP_ERROR_MESSAGES = {
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429: "模型速率超限或额度不足！",
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502: "网关超时。请重试或将网络切换为美国直连",
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503: "模型超载。请稍后重试！",
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504: "网关超时。请稍后重试。",
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}
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# 错误内容关键词 → 用户友好文案（优先于状态码匹配）
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ERROR_CONTENT_MESSAGES = {
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"Your request was rejected by the safety system": "请求被安全系统拦截：请调整提示词，避免敏感、违规、血腥、色情、仇恨、未成年人或真实人物等高风险内容。",
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"safety system": "请求被安全系统拦截：请调整提示词，避免敏感、违规、血腥、色情、仇恨、未成年人或真实人物等高风险内容。",
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"unexpected end of JSON input": "通常重试能解决；反复出现就降低分辨率、数量或换网络线路。",
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"The current model has a high load": "模型过载，请稍后重试！",
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"system error": "系统错误，请稍后重试。",
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}
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# 可退避重试的状态码
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RETRYABLE_STATUS_CODES = {429, 502, 503, 504, 524}
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# 退避重试默认参数
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DEFAULT_MAX_RETRIES = 3
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DEFAULT_BASE_DELAY = 2.0 # 首次重试等待秒数
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DEFAULT_MAX_DELAY = 30.0 # 最大等待秒数
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DEFAULT_BACKOFF_FACTOR = 2.0 # 指数退避因子
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def get_friendly_message(status_code: int, raw_message: str = "") -> str:
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"""根据状态码/错误内容返回友好文案，未匹配则返回原始信息"""
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if status_code == 524:
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return "Gateway timed out while waiting for upstream image generation. Please retry, lower resolution/count, or switch network route."
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if raw_message:
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raw_message_lower = raw_message.lower()
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for keyword, friendly_msg in ERROR_CONTENT_MESSAGES.items():
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if keyword.lower() in raw_message_lower:
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return friendly_msg
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if status_code == 500:
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return "服务器返回 500：上游生成失败或服务端临时异常。请稍后重试；如果多次出现，请降低分辨率/数量，或调整提示词。"
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friendly = HTTP_ERROR_MESSAGES.get(status_code)
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if friendly:
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return friendly
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return raw_message or f"请求失败 ({status_code})"
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def raise_for_status(status_code: int, raw_message: str = "", prefix: str = ""):
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"""根据状态码抛出带友好文案的 RuntimeError"""
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friendly = get_friendly_message(status_code, raw_message)
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full_msg = f"{prefix}{friendly}" if prefix else friendly
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raise RuntimeError(full_msg)
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def is_retryable(status_code: int) -> bool:
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return status_code in RETRYABLE_STATUS_CODES
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def _compute_delay(attempt: int, base_delay: float, max_delay: float, backoff_factor: float) -> float:
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"""计算第 attempt 次重试的等待时间（含 jitter）"""
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delay = base_delay * (backoff_factor ** attempt)
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delay = min(delay, max_delay)
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jitter = random.uniform(0, delay * 0.3)
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return delay + jitter
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async def async_request_with_retry(
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session: aiohttp.ClientSession,
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method: str,
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url: str,
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*,
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max_retries: int = DEFAULT_MAX_RETRIES,
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base_delay: float = DEFAULT_BASE_DELAY,
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max_delay: float = DEFAULT_MAX_DELAY,
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backoff_factor: float = DEFAULT_BACKOFF_FACTOR,
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prefix: str = "",
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**request_kwargs,
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) -> aiohttp.ClientResponse:
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"""
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带退避重试的 aiohttp 请求。
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仅对 RETRYABLE_STATUS_CODES (429/502/503/504/524) 进行重试。
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超过最大重试次数后抛出友好 RuntimeError。
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成功时返回 response 对象（调用者需在 async with 外自行处理 body）。
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用法示例：
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resp = await async_request_with_retry(session, "POST", url, json=body, headers=headers)
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data = await resp.json()
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"""
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last_status: Optional[int] = None
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last_message = ""
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for attempt in range(max_retries + 1):
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try:
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resp = await session.request(method, url, **request_kwargs)
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except (aiohttp.ClientError, asyncio.TimeoutError) as e:
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if attempt < max_retries:
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delay = _compute_delay(attempt, base_delay, max_delay, backoff_factor)
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print(f"{prefix}网络错误，{delay:.1f}s 后重试 ({attempt+1}/{max_retries})...")
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await asyncio.sleep(delay)
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continue
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raise RuntimeError(f"{prefix}网络错误: {e}") from None
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if resp.status == 200:
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return resp
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last_status = resp.status
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try:
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last_message = await resp.text()
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except Exception:
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last_message = ""
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if is_retryable(resp.status) and attempt < max_retries:
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delay = _compute_delay(attempt, base_delay, max_delay, backoff_factor)
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friendly = get_friendly_message(resp.status)
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print(f"{prefix}{friendly} {delay:.1f}s 后重试 ({attempt+1}/{max_retries})...")
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await asyncio.sleep(delay)
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continue
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break
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if last_status and last_status in HTTP_ERROR_MESSAGES:
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raise_for_status(last_status, raw_message=last_message, prefix=prefix)
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friendly = get_friendly_message(last_status or 0, last_message)
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raise RuntimeError(f"{prefix}{friendly}")
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