fix(media): AGNES 图像/视频生成加韧性层——指数退避重试+友好错误翻译+Bot解析加固
根因(实测复现): AGNES 外部服务不稳定, 非平台代码问题: - 视频创建常返 500 publish_video_queue_failed / context deadline exceeded - 连接偶发重置 Server disconnected - 视频硬限频 每分钟 1 次 (429 rate limit) 改动: 1. chat.py 新增 _agnes_post_json(): 对 5xx/连接中断做 3 次指数退避重试(2/4s); 4xx(参数错误)不重试直接返回 2. 新增 _friendly_media_err(): 把 AGNES 原始 HTTP/JSON 错误 转译为对用户友好的中文(限频/连接失败/队列繁忙), 不再透传原始报错 3. _generate_media 图像/视频分支改用上述重试+友好错误 4. im_llm.py Bot 媒体结果解析加固: strip 后判 <img>/<video>, 成功返回干净链接; 失败透传友好中文, 绝不把原始提示词/标签甩给用户 验证(容器内实测): - WEB_IMG OK / WEB_VID OK / BOT_IMG OK (均返回真实 png/mp4) - 429/断开/队列三类错误均正确转译为友好中文
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@@ -239,6 +239,49 @@ async def _optimize_media_prompt(raw_prompt: str, media_type: str, db=None) -> s
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return stripped
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def _friendly_media_err(kind: str, raw: str) -> str:
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"""把 AGNES 原始错误转译为对用户友好的中文。
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AGNES 常见错误：429 限频(每分钟1次视频) / Server disconnected(连接重置) /
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publish_video_queue_failed + context deadline exceeded(队列超时)。这些都不是
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平台代码问题，统一给出可操作的提示，不把原始 HTTP/JSON 甩给用户。
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"""
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r = (raw or "").lower()
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if "429" in raw or "rate limit" in r:
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return (f"⚠️ {kind}生成请求过于频繁（AGNES 限制每分钟 1 次），"
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f"请稍等 1 分钟后再试。")
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if "server disconnected" in r or "连接" in raw or "reset" in r:
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return f"⚠️ {kind}生成服务暂时连接失败，请稍后重试。"
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if "publish_video" in r or "queue" in r or "deadline" in r or "context" in r:
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return f"⚠️ {kind}生成队列繁忙（AGNES 处理超时），请稍后重试。"
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return f"⚠️ {kind}生成失败（请稍后重试）：{(raw or '')[:120]}"
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async def _agnes_post_json(api_url: str, headers: dict, payload: dict, timeout) -> tuple:
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"""直连 AGNES 发 POST，对 5xx / 连接中断做指数退避重试。
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AGNES 视频/图像队列极不稳定：经常返回 500 publish_video_queue_failed /
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context deadline exceeded，或连接被重置(Server disconnected)。这类错误是 AGNES
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侧瞬时抖动，重试通常立刻成功。4xx（参数错误）不重试，直接返回。
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返回 (resp, err)：成功(resp.status_code<500) 时 err=None；耗尽重试时 resp=None。
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"""
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last_err = None
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for attempt in range(3):
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try:
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async with httpx.AsyncClient(
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timeout=timeout, proxy=_proxy_for_url(api_url), trust_env=False
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) as client:
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resp = await client.post(api_url, headers=headers, json=payload)
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if resp.status_code < 500:
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return resp, None
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last_err = f"HTTP {resp.status_code}: {resp.text[:200]}"
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except Exception as e:
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last_err = str(e)[:200]
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if attempt < 2:
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await asyncio.sleep(2 * (attempt + 1))
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return None, last_err
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async def _generate_media(db, ai_model, prompt: str, user_id: str = None) -> str:
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"""图像/视频生成模型统一入口：按 capabilities 调用 AGNES 等媒体生成 API。
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返回可直接在 AI 聊天中渲染的富文本(含 <img>/<video> 标签)。"""
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@@ -265,25 +308,27 @@ async def _generate_media(db, ai_model, prompt: str, user_id: str = None) -> str
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"prompt": optimized_prompt,
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"size": "1024x768",
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}
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resp, err = await _agnes_post_json(api_url, headers, payload, timeout)
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if resp is None:
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# 3 次重试后仍失败 → AGNES 侧持续抖动，提示稍后重试而非甩原始错误
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return _friendly_media_err("图像", err)
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if resp.status_code != 200:
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return _friendly_media_err("图像", f"HTTP {resp.status_code}: {resp.text[:200]}")
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try:
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async with httpx.AsyncClient(timeout=timeout, proxy=_proxy_for_url(api_url), trust_env=False) as client:
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resp = await client.post(api_url, headers=headers, json=payload)
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if resp.status_code != 200:
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return f"⚠️ 图像生成失败 (HTTP {resp.status_code}): {resp.text[:200]}"
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data = resp.json()
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items = data.get("data") or []
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if not items:
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return f"⚠️ 图像生成失败：响应无图片数据 {str(data)[:200]}"
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item = items[0]
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url = item.get("url") or item.get("b64_json")
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if not url:
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return f"⚠️ 图像生成失败：未返回图片地址 {str(data)[:200]}"
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if not url.startswith("http"):
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url = f"data:image/png;base64,{url}"
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return (f'<img class="md-img" src="{url}" alt="生成图片"/>\n\n'
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f'**提示词：** {_html_escape(prompt)}')
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except Exception as e:
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return f"⚠️ 图像生成异常：{str(e)[:200]}"
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except Exception:
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return f"⚠️ 图像生成失败：响应解析错误 {resp.text[:200]}"
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items = data.get("data") or []
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if not items:
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return f"⚠️ 图像生成失败：响应无图片数据 {str(data)[:200]}"
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item = items[0]
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url = item.get("url") or item.get("b64_json")
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if not url:
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return f"⚠️ 图像生成失败：未返回图片地址 {str(data)[:200]}"
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if not url.startswith("http"):
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url = f"data:image/png;base64,{url}"
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return (f'<img class="md-img" src="{url}" alt="生成图片"/>\n\n'
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f'**提示词：** {_html_escape(prompt)}')
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# ============ 视频生成 (异步任务 + 轮询) ============
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if "video" in caps:
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@@ -303,38 +348,45 @@ async def _generate_media(db, ai_model, prompt: str, user_id: str = None) -> str
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"num_frames": 121,
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"frame_rate": 24,
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}
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resp, err = await _agnes_post_json(api_url, headers, payload, timeout)
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if resp is None:
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return _friendly_media_err("视频", err)
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if resp.status_code != 200:
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return _friendly_media_err("视频", f"HTTP {resp.status_code}: {resp.text[:200]}")
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try:
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async with httpx.AsyncClient(timeout=timeout, proxy=_proxy_for_url(api_url), trust_env=False) as client:
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resp = await client.post(api_url, headers=headers, json=payload)
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if resp.status_code != 200:
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return f"⚠️ 视频生成失败 (HTTP {resp.status_code}): {resp.text[:200]}"
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data = resp.json()
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video_id = data.get("video_id") or data.get("task_id") or data.get("id")
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if not video_id:
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return f"⚠️ 视频生成失败：未返回任务ID {str(data)[:200]}"
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# 轮询结果(最多约 5 分钟)。AGNES 视频状态端点为 GET {base}/v1/videos/{video_id}
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# 该端点顶层返回 status(queued/in_progress/completed/failed)，成片地址在 metadata.url
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result_url = None
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err_msg = None
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for _ in range(60):
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await asyncio.sleep(5)
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data = resp.json()
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except Exception:
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return f"⚠️ 视频生成失败：响应解析错误 {resp.text[:200]}"
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video_id = data.get("video_id") or data.get("task_id") or data.get("id")
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if not video_id:
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return f"⚠️ 视频生成失败：未返回任务ID {str(data)[:200]}"
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# 轮询结果(最多约 5 分钟)。AGNES 视频状态端点为 GET {base}/v1/videos/{video_id}
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# 该端点顶层返回 status(queued/in_progress/completed/failed)，成片地址在 metadata.url
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result_url = None
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err_msg = None
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for _ in range(60):
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await asyncio.sleep(5)
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try:
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async with httpx.AsyncClient(
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timeout=timeout, proxy=_proxy_for_url(f"{base}/v1/videos/{video_id}"), trust_env=False
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) as client:
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r2 = await client.get(f"{base}/v1/videos/{video_id}", headers=headers)
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if r2.status_code != 200:
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continue
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rd = r2.json()
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st = rd.get("status")
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if st == "completed":
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result_url = (rd.get("metadata") or {}).get("url") or rd.get("url")
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break
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if st == "failed":
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err_msg = rd.get("error") or (rd.get("metadata") or {}).get("error")
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break
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if result_url:
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return (f'<video class="md-video" controls src="{result_url}"></video>\n\n'
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f'**提示词：** {_html_escape(prompt)}')
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return f"⚠️ 视频生成失败：{err_msg or '生成超时，请稍后在对话中重试'}"
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except Exception as e:
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return f"⚠️ 视频生成异常：{str(e)[:200]}"
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except Exception:
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continue
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if r2.status_code != 200:
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continue
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rd = r2.json()
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st = rd.get("status")
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if st == "completed":
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result_url = (rd.get("metadata") or {}).get("url") or rd.get("url")
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break
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if st == "failed":
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err_msg = rd.get("error") or (rd.get("metadata") or {}).get("error")
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break
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if result_url:
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return (f'<video class="md-video" controls src="{result_url}"></video>\n\n'
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f'**提示词：** {_html_escape(prompt)}')
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return f"⚠️ 视频生成失败：{err_msg or '生成超时，请稍后在对话中重试'}"
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return "⚠️ 未知的媒体模型类型。"
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