feat(meituan): 政治类文章拦截 + 写'无可奉告' + Angel 并发 3→1

- llm_settings 加 meituan_blocked_topics / blocked_keywords / no_comment_text - alembic 0006 迁移,默认 topics=[时政/国际/军事/政治/战争/冲突/制裁/选举], 默认文案='无可奉告' - enrichment._is_meituan_blocked 预检:category 命中 topic 或关键词 → 直接写'无可奉告',不调美团 API - 命中后 commentary_meituan_model='policy-block' 标识非真实生成 - enrichment_loop Semaphore(3)→(1),Agnes 免费 plan 不再 429 - 前端 AdminLlmSettings 美团卡片加 3 字段 UI(主题/关键词/固定文案)
2026-06-12 22:44:00 +08:00
parent aaf728f3f4
commit 16536fe3a0
6 changed files with 185 additions and 2 deletions
--- a/backend/alembic/versions/0006_meituan_blocked_topics.py
+++ b/backend/alembic/versions/0006_meituan_blocked_topics.py
@@ -0,0 +1,64 @@
+"""美团"无可奉告"主题清单 — 命中则不调美团 API,直接写固定文案
+
+- llm_settings.meituan_blocked_topics    JSONB  (默认 ["时政", "国际", "军事", "政治", "战争", "冲突", "制裁", "选举"])
+- llm_settings.meituan_blocked_keywords  JSONB  (默认 [])
+- llm_settings.meituan_no_comment_text    TEXT   (默认 "无可奉告")
+
+Revision ID: 0006
+Revises: 0005
+Create Date: 2026-06-12
+"""
+from __future__ import annotations
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+from sqlalchemy.dialects.postgresql import JSONB
+
+revision: str = "0006"
+down_revision: Union[str, None] = "0005"
+branch_labels = None
+depends_on = None
+
+
+DEFAULT_TOPICS = ["时政", "国际", "军事", "政治", "战争", "冲突", "制裁", "选举"]
+
+
+def upgrade() -> None:
+    import json
+    default_topics_json = sa.text(repr(json.dumps(DEFAULT_TOPICS, ensure_ascii=False)))
+
+    op.add_column(
+        "llm_settings",
+        sa.Column(
+            "meituan_blocked_topics",
+            JSONB,
+            nullable=False,
+            server_default=default_topics_json,
+        ),
+    )
+    op.add_column(
+        "llm_settings",
+        sa.Column(
+            "meituan_blocked_keywords",
+            JSONB,
+            nullable=False,
+            server_default=sa.text("'[]'::jsonb"),
+        ),
+    )
+    op.add_column(
+        "llm_settings",
+        sa.Column(
+            "meituan_no_comment_text",
+            sa.Text,
+            nullable=False,
+            server_default="无可奉告",
+        ),
+    )
+
+
+def downgrade() -> None:
+    op.drop_column("llm_settings", "meituan_no_comment_text")
+    op.drop_column("llm_settings", "meituan_blocked_keywords")
+    op.drop_column("llm_settings", "meituan_blocked_topics")
--- a/backend/app/models/llm_setting.py
+++ b/backend/app/models/llm_setting.py
@@ -71,6 +71,20 @@ class LlmSetting(Base):
    meituan_interval_sec: Mapped[float] = mapped_column(default=2.0, nullable=False)
    meituan_enabled: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
    meituan_commentary_prompt: Mapped[str | None] = mapped_column(Text)  # 留空用默认
+    # 美团"无可奉告"主题清单 — 命中这些 topic 的文章,直接写"无可奉告" + 不调美团 API
+    # (避免 LongCat security_audit_fail 400 循环重试,污染评论失败率)
+    # 匹配规则:article.category 含任一项 OR 标题/正文命中关键词(宽松匹配)
+    meituan_blocked_topics: Mapped[list[str]] = mapped_column(
+        JSONB, nullable=False, default=list, server_default="[]"
+    )
+    meituan_blocked_keywords: Mapped[list[str]] = mapped_column(
+        JSONB, nullable=False, default=list, server_default="[]"
+    )
+    meituan_no_comment_text: Mapped[str] = mapped_column(
+        Text,
+        default="无可奉告",
+        nullable=False,
+    )

    # === 时间 ===
    updated_at: Mapped[datetime] = mapped_column(
--- a/backend/app/schemas/llm.py
+++ b/backend/app/schemas/llm.py
@@ -32,6 +32,10 @@ class LlmSettingOut(BaseModel):
    meituan_interval_sec: float = 2.0
    meituan_enabled: bool = True
    meituan_commentary_prompt: str | None = None
+    # 美团"无可奉告"主题清单(命中则不调美团 API,直接写固定文案)
+    meituan_blocked_topics: list[str] = []
+    meituan_blocked_keywords: list[str] = []
+    meituan_no_comment_text: str = "无可奉告"
    updated_at: datetime | None = None

    @classmethod
@@ -57,6 +61,9 @@ class LlmSettingOut(BaseModel):
            meituan_interval_sec=row.meituan_interval_sec,
            meituan_enabled=row.meituan_enabled,
            meituan_commentary_prompt=row.meituan_commentary_prompt,
+            meituan_blocked_topics=row.meituan_blocked_topics or [],
+            meituan_blocked_keywords=row.meituan_blocked_keywords or [],
+            meituan_no_comment_text=row.meituan_no_comment_text or "无可奉告",
            updated_at=row.updated_at,
        )

@@ -84,6 +91,9 @@ class LlmSettingUpdate(BaseModel):
    meituan_interval_sec: float | None = Field(default=None, ge=0.0, le=60.0)
    meituan_enabled: bool | None = None
    meituan_commentary_prompt: str | None = None
+    meituan_blocked_topics: list[str] | None = None
+    meituan_blocked_keywords: list[str] | None = None
+    meituan_no_comment_text: str | None = None


 # === 默认提示词(模板,用户可改)===
--- a/backend/app/services/llm/enrichment.py
+++ b/backend/app/services/llm/enrichment.py
@@ -320,10 +320,55 @@ async def _enrich_commentary_angel(
    article.commentary_engine = ",".join(sorted(engines))


+# === 美团"无可奉告"预检 ===
+# 美团(LongCat)对战争/政治/敏感新闻会触发 security_audit_fail 400,
+# 死循环重试不解决问题。命中"政治类"文章直接写固定文案,不调美团 API。
+# 命中规则:
+#   1) article.category(LLM 已分类,逗号分隔)中含 meituan_blocked_topics 任一项
+#   2) 标题/正文命中 meituan_blocked_keywords 任一关键词(宽松包含)
+def _is_meituan_blocked(article: Article, setting: LlmSetting) -> bool:
+    """返回 True 表示这篇应该被"无可奉告"处理(不调美团 API)。"""
+    topics = set(setting.meituan_blocked_topics or [])
+    keywords = [k for k in (setting.meituan_blocked_keywords or []) if k]
+    if topics:
+        cats = {c.strip() for c in (article.category or "").split(",") if c.strip()}
+        if cats & topics:
+            return True
+    if keywords:
+        text = " ".join(
+            (article.title_zh or ""), (article.title or ""),
+            (article.body_zh_text or "")[:1500],
+        )
+        for kw in keywords:
+            if kw and kw in text:
+                return True
+    return False
+
+
 async def _enrich_commentary_meituan(
    article: Article, setting: LlmSetting, client: LlmClient
 ) -> None:
-    """美团评论 — 写入 commentary_meituan 等新字段。"""
+    """美团评论 — 写入 commentary_meituan 等新字段。
+
+    预检:命中"政治类"主题的文章直接写"无可奉告"固定文案,
+    不调美团 API(避免 LongCat security_audit_fail 400 循环)。
+    """
+    # === 预检:政治类文章写"无可奉告" ===
+    if _is_meituan_blocked(article, setting):
+        no_text = setting.meituan_no_comment_text or "无可奉告"
+        article.commentary_meituan = no_text
+        article.commentary_meituan_status = "ok"
+        article.commentary_meituan_error = None
+        article.commentary_meituan_model = "policy-block"  # 标识非真实生成
+        engines = set(filter(None, (article.commentary_engine or "").split(",")))
+        engines.add(PROVIDER_MEITUAN)
+        article.commentary_engine = ",".join(sorted(engines))
+        logger.info(
+            "commentary_meituan policy-block for article %s (category=%s)",
+            article.id, article.category,
+        )
+        return
+
    # 优先用 setting.meituan_commentary_prompt,留空用默认
    template = setting.meituan_commentary_prompt or _default_commentary_prompt()
    prompt = _safe_format(
@@ -548,7 +593,10 @@ async def enrichment_loop() -> None:

            # 并发 enrich 多篇(LlmClient 内部 interval_sec 已经做了限速,这里只并发不限并发上限)
            # 但为了不让 LLM API 同时打太多,加一层并发上限
-            sem = asyncio.Semaphore(3)
+            # 2026-06-12 调:3→1。Agnes 免费 plan 在并发 3 时会偶发 429
+            # (每篇 enrich 内部 Angel 跑 4 chat + 1 image,3 路并发 = 12+3 短时突发),
+            # 降到 1 路串行,稳定不超限,且不浪费 429 重试窗口。
+            sem = asyncio.Semaphore(1)
            async def _run_one(aid: int) -> None:
                async with sem:
                    try:
--- a/frontend/src/api/articles.ts
+++ b/frontend/src/api/articles.ts
@@ -102,6 +102,10 @@ export interface LlmSetting {
  meituan_interval_sec?: number
  meituan_enabled?: boolean
  meituan_commentary_prompt?: string | null
+  // 命中"无可奉告"主题清单(政治/战争/敏感新闻,直接写固定文案,不调美团 API)
+  meituan_blocked_topics?: string[]
+  meituan_blocked_keywords?: string[]
+  meituan_no_comment_text?: string
  updated_at?: string | null
 }

--- a/frontend/src/views/AdminLlmSettings.vue
+++ b/frontend/src/views/AdminLlmSettings.vue
@@ -30,6 +30,9 @@ const setting = ref<LlmSetting>({
  meituan_interval_sec: 2.0,
  meituan_enabled: true,
  meituan_commentary_prompt: '',
+  meituan_blocked_topics: ['时政', '国际', '军事', '政治', '战争', '冲突', '制裁', '选举'],
+  meituan_blocked_keywords: [],
+  meituan_no_comment_text: '无可奉告',
 })

 // === Angel api_key 编辑(不回显真值) ===
@@ -324,6 +327,46 @@ onMounted(load)
          placeholder="留空用默认"
          style="margin-top: 8px"
        />
+
+        <NDivider style="margin: 12px 0" />
+        <NText strong>🚧 主题拦截("无可奉告")</NText>
+        <NText depth="3" style="font-size: 12px; margin-top: 4px; display: block">
+          美团 LongCat 对战争/政治/敏感新闻会触发内容安全审核 400。<br />
+          命中下述"主题"或"关键词"的文章,直接写固定文案(<NCode>无可奉告</NCode>),不调美团 API。
+        </NText>
+        <NSpace vertical style="margin-top: 8px">
+          <NSpace align="start">
+            <NText style="min-width: 80px; padding-top: 4px">主题(topic):</NText>
+            <NInput
+              :value="(setting.meituan_blocked_topics || []).join(' / ')"
+              type="textarea"
+              :autosize="{ minRows: 2, maxRows: 4 }"
+              placeholder="时政 / 国际 / 军事"
+              style="width: 380px"
+              @update:value="(v: string) => setting.meituan_blocked_topics = v.split(/[,,;\n]/).map(s => s.trim()).filter(Boolean)"
+            />
+          </NSpace>
+          <NSpace align="start">
+            <NText style="min-width: 80px; padding-top: 4px">关键词:</NText>
+            <NInput
+              :value="(setting.meituan_blocked_keywords || []).join(' / ')"
+              type="textarea"
+              :autosize="{ minRows: 2, maxRows: 4 }"
+              placeholder="(留空) — 命中标题或正文任一关键词即触发"
+              style="width: 380px"
+              @update:value="(v: string) => setting.meituan_blocked_keywords = v.split(/[,,;\n]/).map(s => s.trim()).filter(Boolean)"
+            />
+          </NSpace>
+          <NSpace align="center">
+            <NText style="min-width: 80px">固定文案:</NText>
+            <NInput
+              v-model:value="setting.meituan_no_comment_text"
+              placeholder="无可奉告"
+              style="width: 200px"
+            />
+            <NText depth="3" style="font-size: 12px">(命中后写入 commentary_meituan 字段的内容)</NText>
+          </NSpace>
+        </NSpace>
      </NCard>

      <NCard title="排版提示词" style="margin-top: 16px">