612 lines
20 KiB
Python
612 lines
20 KiB
Python
"""抓取并整理国际 / 国内 AI 时讯 RSS。"""
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from __future__ import annotations
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import logging
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import re
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import time
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import html
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import xml.etree.ElementTree as ET
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from concurrent.futures import ThreadPoolExecutor, as_completed
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from datetime import datetime, timezone, timedelta
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from email.utils import parsedate_to_datetime
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from typing import Any
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from urllib.parse import parse_qs, urlencode, urlparse, urlunparse
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import certifi
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import httpx
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from daily.config import env, env_int, news_summary_limit
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from daily.news.content_filter import filter_news_items
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from daily.news.feeds import NEWS_CATEGORIES, NewsCategory, NewsFeed
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from daily.news.feeds_cn import CN_AI_TITLE_KEYWORDS, CN_NEWS_CATEGORIES
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logger = logging.getLogger(__name__)
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# 部分站点（如 InfoQ）会拦截含 bot 标识的 UA，RSS 抓取统一用浏览器 UA
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RSS_USER_AGENT = (
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"Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
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"AppleWebKit/537.36 (KHTML, like Gecko) "
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"Chrome/131.0.0.0 Safari/537.36"
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)
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BROWSER_USER_AGENT = RSS_USER_AGENT
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STRIP_HTML = re.compile(r"<[^>]+>")
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WS = re.compile(r"\s+")
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ATOM_NS = {"a": "http://www.w3.org/2005/Atom"}
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RSS_NS = {"r": "http://purl.org/rss/1.0/modules/content/"}
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def _enabled() -> bool:
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raw = (env("DAILY_AI_NEWS") or "1").strip().lower()
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return raw not in {"0", "false", "no", "off"}
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def _cn_enabled() -> bool:
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raw = (env("DAILY_CN_AI_NEWS") or "1").strip().lower()
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return raw not in {"0", "false", "no", "off"}
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def _hours_window() -> int:
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return max(1, env_int("DAILY_AI_NEWS_HOURS", 72))
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def _per_feed_limit() -> int:
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return max(1, env_int("DAILY_AI_NEWS_PER_FEED", 3))
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def _per_category_limit() -> int:
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return max(1, env_int("DAILY_AI_NEWS_PER_CATEGORY", 5))
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def _wecom_limit() -> int:
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return max(1, env_int("DAILY_WECOM_AI_NEWS", 10))
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def _wecom_cn_limit() -> int:
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return max(1, env_int("DAILY_WECOM_CN_AI_NEWS", 8))
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def _matches_cn_ai_title(title: str) -> bool:
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text = title.strip()
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if not text:
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return False
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lower = text.lower()
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for keyword in CN_AI_TITLE_KEYWORDS:
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if keyword.lower() in lower:
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return True
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return False
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def _filter_ai_entries(entries: list[dict[str, Any]], *, ai_filter: bool) -> list[dict[str, Any]]:
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if not ai_filter:
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return entries
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return [item for item in entries if _matches_cn_ai_title(item.get("title", ""))]
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def _now_utc() -> datetime:
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return datetime.now(timezone.utc)
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def _parse_datetime(value: str | None) -> datetime | None:
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if not value:
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return None
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text = value.strip()
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if not text:
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return None
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try:
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dt = parsedate_to_datetime(text)
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if dt.tzinfo is None:
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dt = dt.replace(tzinfo=timezone.utc)
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return dt.astimezone(timezone.utc)
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except (TypeError, ValueError, OverflowError):
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pass
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for fmt in (
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"%Y-%m-%dT%H:%M:%SZ",
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"%Y-%m-%dT%H:%M:%S%z",
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"%Y-%m-%d",
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):
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try:
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dt = datetime.strptime(text[: len(fmt.replace("%z", "+0000"))], fmt.replace("%z", ""))
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if dt.tzinfo is None:
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dt = dt.replace(tzinfo=timezone.utc)
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return dt.astimezone(timezone.utc)
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except ValueError:
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continue
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return None
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def _clean_text(text: str | None, limit: int = 200) -> str:
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if not text:
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return ""
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plain = STRIP_HTML.sub(" ", html.unescape(text))
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plain = WS.sub(" ", plain).strip()
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if limit <= 0 or len(plain) <= limit:
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return plain
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return plain[: limit - 3] + "..."
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def _normalize_link(link: str) -> str:
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parsed = urlparse(link.strip())
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query = parse_qs(parsed.query, keep_blank_values=False)
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for key in list(query.keys()):
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if key.lower().startswith("utm_") or key.lower() in {"ref", "source"}:
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query.pop(key, None)
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clean_query = urlencode({k: v[0] for k, v in query.items() if v}, doseq=False)
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return urlunparse((parsed.scheme, parsed.netloc, parsed.path.rstrip("/"), "", clean_query, ""))
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def _normalize_title(title: str) -> str:
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return WS.sub(" ", title.strip().lower())
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def _entry_datetime(entry: dict[str, Any]) -> datetime | None:
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for key in ("published", "updated"):
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dt = _parse_datetime(entry.get(key))
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if dt:
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return dt
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return None
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def _parse_atom(content: str, feed_name: str, category: NewsCategory) -> list[dict[str, Any]]:
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items: list[dict[str, Any]] = []
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try:
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root = ET.fromstring(content)
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except ET.ParseError:
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return items
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for entry in root.findall("a:entry", ATOM_NS):
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title_el = entry.find("a:title", ATOM_NS)
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link_el = entry.find("a:link", ATOM_NS)
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summary_el = entry.find("a:summary", ATOM_NS) or entry.find("a:content", ATOM_NS)
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updated_el = entry.find("a:updated", ATOM_NS) or entry.find("a:published", ATOM_NS)
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title = title_el.text.strip() if title_el is not None and title_el.text else ""
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link = ""
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if link_el is not None:
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link = link_el.get("href") or (link_el.text or "").strip()
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if not title or not link:
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continue
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items.append(
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{
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"title": title,
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"link": link,
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"summary": _clean_text(summary_el.text if summary_el is not None else ""),
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"published": updated_el.text.strip() if updated_el is not None and updated_el.text else "",
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"source_name": feed_name,
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"category_id": category.id,
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"category_name": category.name,
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"category_icon": category.icon,
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}
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)
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return items
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def _parse_rss(content: str, feed_name: str, category: NewsCategory) -> list[dict[str, Any]]:
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items: list[dict[str, Any]] = []
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try:
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root = ET.fromstring(content)
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except ET.ParseError:
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return items
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channel = root.find("channel")
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if channel is None:
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return items
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for item in channel.findall("item"):
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title_el = item.find("title")
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link_el = item.find("link")
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desc_el = item.find("description")
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pub_el = item.find("pubDate")
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title = title_el.text.strip() if title_el is not None and title_el.text else ""
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link = link_el.text.strip() if link_el is not None and link_el.text else ""
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if not title or not link:
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continue
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items.append(
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{
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"title": title,
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"link": link,
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"summary": _clean_text(desc_el.text if desc_el is not None else ""),
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"published": pub_el.text.strip() if pub_el is not None and pub_el.text else "",
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"source_name": feed_name,
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"category_id": category.id,
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"category_name": category.name,
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"category_icon": category.icon,
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}
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)
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return items
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def _parse_feed(content: str, feed_name: str, category: NewsCategory) -> list[dict[str, Any]]:
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text = content.lstrip("\ufeff").strip()
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if not text:
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return []
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if text.startswith("<rss") or "<channel>" in text[:500]:
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return _parse_rss(text, feed_name, category)
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if text.startswith("<feed") or "<entry>" in text[:500]:
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return _parse_atom(text, feed_name, category)
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if "<item>" in text[:2000]:
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return _parse_rss(text, feed_name, category)
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return _parse_atom(text, feed_name, category)
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def _is_reddit_url(url: str) -> bool:
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host = urlparse(url).netloc.lower()
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return host.endswith("reddit.com")
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def _reddit_auth_params() -> dict[str, str]:
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user = (env("REDDIT_RSS_USER") or "").strip()
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feed = (env("REDDIT_RSS_FEED") or "").strip()
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if user and feed:
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return {"user": user, "feed": feed}
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return {}
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def _with_query_params(url: str, extra: dict[str, str]) -> str:
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if not extra:
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return url
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parsed = urlparse(url)
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query = parse_qs(parsed.query, keep_blank_values=True)
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for key, value in extra.items():
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if value and key not in query:
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query[key] = [value]
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clean_query = urlencode({k: v[0] for k, v in query.items() if v and v[0]}, doseq=False)
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return urlunparse((parsed.scheme, parsed.netloc, parsed.path, "", clean_query, ""))
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def _reddit_old_url(url: str) -> str:
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parsed = urlparse(url)
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host = parsed.netloc.lower()
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if host.startswith("old."):
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return url
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if host in {"www.reddit.com", "reddit.com"}:
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return urlunparse((parsed.scheme, "old.reddit.com", parsed.path, "", parsed.query, ""))
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return url
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def _request_headers(base: dict[str, str], url: str) -> dict[str, str]:
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if not _is_reddit_url(url):
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return base
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return {
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**base,
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"User-Agent": BROWSER_USER_AGENT,
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"Accept-Language": "en-US,en;q=0.9",
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}
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def _reddit_fetch_urls(feed_url: str) -> list[str]:
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primary = _with_query_params(feed_url, _reddit_auth_params())
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if not _is_reddit_url(primary):
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return [primary]
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fallback = _reddit_old_url(primary)
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if fallback == primary:
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return [primary]
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return [primary, fallback]
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def _fetch_one(
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client: httpx.Client,
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category: NewsCategory,
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feed: NewsFeed,
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) -> tuple[list[dict[str, Any]], bool]:
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last_exc: Exception | None = None
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for url in _reddit_fetch_urls(feed.url):
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try:
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headers = _request_headers(dict(client.headers), url)
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resp = client.get(url, headers=headers)
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resp.raise_for_status()
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entries = _parse_feed(resp.text, feed.name, category)
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return _filter_ai_entries(entries, ai_filter=feed.ai_filter), True
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except Exception as exc:
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last_exc = exc
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continue
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logger.warning("RSS fetch failed [%s] %s: %s", feed.name, feed.url, last_exc)
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return [], False
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def _dedupe_items(items: list[dict[str, Any]]) -> list[dict[str, Any]]:
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seen_links: set[str] = set()
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seen_titles: set[str] = set()
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result: list[dict[str, Any]] = []
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for item in items:
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link_key = _normalize_link(item["link"])
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title_key = _normalize_title(item["title"])
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if link_key in seen_links or title_key in seen_titles:
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continue
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seen_links.add(link_key)
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seen_titles.add(title_key)
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result.append(item)
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return result
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def _within_window(item: dict[str, Any], cutoff: datetime) -> bool:
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dt = _entry_datetime(item)
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if dt is None:
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return True
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return dt >= cutoff
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def _sort_key(item: dict[str, Any]) -> tuple[int, datetime]:
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dt = _entry_datetime(item)
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if dt is None:
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return (1, datetime.min.replace(tzinfo=timezone.utc))
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return (0, dt)
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def _fetch_news(categories: tuple[NewsCategory, ...]) -> dict[str, Any]:
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hours = _hours_window()
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per_feed = _per_feed_limit()
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per_category = _per_category_limit()
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cutoff = _now_utc() - timedelta(hours=hours)
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headers = {"User-Agent": RSS_USER_AGENT, "Accept": "application/rss+xml, application/atom+xml, application/xml, text/xml, */*"}
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tasks: list[tuple[NewsCategory, NewsFeed]] = []
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for category in categories:
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for feed in category.feeds:
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tasks.append((category, feed))
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raw_by_category: dict[str, list[dict[str, Any]]] = {c.id: [] for c in categories}
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stats: dict[str, Any] = {
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"feeds_total": len(tasks),
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"feeds_ok": 0,
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"items_raw": 0,
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"feeds_failed": [],
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"content_filtered": 0,
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}
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with httpx.Client(timeout=15.0, verify=certifi.where(), follow_redirects=True, headers=headers) as client:
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fast_tasks = [t for t in tasks if not t[1].slow]
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slow_tasks = [t for t in tasks if t[1].slow]
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with ThreadPoolExecutor(max_workers=8) as pool:
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futures = {
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pool.submit(_fetch_one, client, cat, feed): (cat.id, feed.name)
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for cat, feed in fast_tasks
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}
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for future in as_completed(futures):
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cat_id, feed_name = futures[future]
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try:
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entries, ok = future.result()
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except Exception as exc:
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logger.warning("RSS 任务异常 [%s]: %s", feed_name, exc)
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stats["feeds_failed"].append(feed_name)
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continue
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if ok:
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stats["feeds_ok"] += 1
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else:
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stats["feeds_failed"].append(feed_name)
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stats["items_raw"] += len(entries)
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raw_by_category[cat_id].extend(entries[:per_feed])
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for cat, feed in slow_tasks:
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entries, ok = _fetch_one(client, cat, feed)
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if ok:
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stats["feeds_ok"] += 1
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else:
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stats["feeds_failed"].append(feed.name)
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stats["items_raw"] += len(entries)
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raw_by_category[cat.id].extend(entries[:per_feed])
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if _is_reddit_url(feed.url):
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time.sleep(2.0)
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else:
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time.sleep(1.0)
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categories_out: list[dict[str, Any]] = []
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flat: list[dict[str, Any]] = []
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for category in categories:
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items = raw_by_category[category.id]
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items = [i for i in items if _within_window(i, cutoff)]
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items, filtered_count = filter_news_items(items)
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if filtered_count:
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stats["content_filtered"] = stats.get("content_filtered", 0) + filtered_count
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items.sort(key=_sort_key, reverse=True)
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items = _dedupe_items(items)[:per_category]
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for item in items:
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dt = _entry_datetime(item)
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item["published_fmt"] = dt.astimezone(timezone(timedelta(hours=8))).strftime("%m-%d %H:%M") if dt else ""
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if items:
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categories_out.append(
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{
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"id": category.id,
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"name": category.name,
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"icon": category.icon,
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"items": items,
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}
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)
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flat.extend(items)
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flat.sort(key=_sort_key, reverse=True)
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flat = _dedupe_items(flat)
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return {
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"enabled": True,
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"hours": hours,
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"categories": categories_out,
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"flat": flat,
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"stats": stats,
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}
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def fetch_ai_news() -> dict[str, Any]:
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"""按类别抓取国际 AI 时讯，返回 {enabled, hours, categories, flat, stats}。"""
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if not _enabled():
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return {"enabled": False, "categories": [], "flat": [], "stats": {}}
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return _fetch_news(NEWS_CATEGORIES)
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def fetch_cn_ai_news() -> dict[str, Any]:
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"""按类别抓取国内 AI 时讯，返回 {enabled, hours, categories, flat, stats}。"""
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if not _cn_enabled():
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return {"enabled": False, "categories": [], "flat": [], "stats": {}}
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return _fetch_news(CN_NEWS_CATEGORIES)
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def format_news_section(news: dict[str, Any], *, section_no: int, wecom_limit: int | None = None) -> list[str]:
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return _format_news_section(
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news,
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section_no=section_no,
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title="国际 AI 时讯",
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disabled_hint="AI 时讯已关闭（`DAILY_AI_NEWS=0`）。",
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wecom_limit=wecom_limit,
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)
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def format_cn_news_section(news: dict[str, Any], *, section_no: int, wecom_limit: int | None = None) -> list[str]:
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return _format_news_section(
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news,
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section_no=section_no,
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title="国内 AI 时讯",
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disabled_hint="国内 AI 时讯已关闭（`DAILY_CN_AI_NEWS=0`）。",
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wecom_limit=wecom_limit,
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)
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def _format_news_section(
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news: dict[str, Any],
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*,
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section_no: int,
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title: str,
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disabled_hint: str,
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wecom_limit: int | None = None,
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) -> list[str]:
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if not news.get("enabled"):
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return ["---", "", f"## {section_no}、{title}", "", f"*{disabled_hint}*", ""]
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categories = news.get("categories") or []
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hours = news.get("hours", 72)
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lines = [
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"---",
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"",
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f"## {section_no}、{title}",
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"",
|
||
f"> 近 **{hours}h** · {news.get('stats', {}).get('feeds_ok', 0)}/{news.get('stats', {}).get('feeds_total', 0)} 源可用",
|
||
"",
|
||
]
|
||
failed = news.get("stats", {}).get("feeds_failed") or []
|
||
if failed:
|
||
preview = "、".join(failed[:5])
|
||
suffix = "…" if len(failed) > 5 else ""
|
||
lines.append(f"> ⚠️ {len(failed)} 个源抓取失败：{preview}{suffix}")
|
||
lines.append("")
|
||
|
||
if not categories:
|
||
lines.append("*暂无可用条目（网络/RSS 源异常或时间窗口内无更新）。*")
|
||
lines.append("")
|
||
return lines
|
||
|
||
if wecom_limit is not None:
|
||
flat = (news.get("flat") or [])[:wecom_limit]
|
||
for i, item in enumerate(flat, 1):
|
||
pub = f" · {item['published_fmt']}" if item.get("published_fmt") else ""
|
||
lines.append(
|
||
f"{i}. [{item['title']}]({item['link']}) · `{item['source_name']}`{pub}"
|
||
)
|
||
lines.append("")
|
||
return lines
|
||
|
||
for cat in categories:
|
||
lines.append(f"### {cat['icon']} {cat['name']}")
|
||
lines.append("")
|
||
for i, item in enumerate(cat["items"], 1):
|
||
pub = f" · {item['published_fmt']}" if item.get("published_fmt") else ""
|
||
lines.append(f"{i}. **[{item['title']}]({item['link']})** · `{item['source_name']}`{pub}")
|
||
summary = item.get("summary", "")
|
||
if summary:
|
||
lines.append(f" - {_clean_text(summary, news_summary_limit())}")
|
||
lines.append("")
|
||
|
||
return lines
|
||
|
||
|
||
def _sorted_flat(news: dict[str, Any]) -> list[dict[str, Any]]:
|
||
flat = list(news.get("flat") or [])
|
||
flat.sort(
|
||
key=lambda item: (float(item.get("score") or 0), _sort_key(item)[1]),
|
||
reverse=True,
|
||
)
|
||
return flat
|
||
|
||
|
||
def prepare_wecom_news_items(news: dict[str, Any], *, limit: int | None = None) -> list[dict[str, Any]]:
|
||
if not news.get("enabled"):
|
||
return []
|
||
pick_limit = limit or _wecom_limit()
|
||
flat = _sorted_flat(news)
|
||
preferred = ("media", "newsletter", "official", "community", "research", "developer")
|
||
picked: list[dict[str, Any]] = []
|
||
seen: set[str] = set()
|
||
for cat in preferred:
|
||
for item in flat:
|
||
link = _normalize_link(item.get("link", ""))
|
||
if item.get("category_id") != cat or link in seen:
|
||
continue
|
||
picked.append(item)
|
||
seen.add(link)
|
||
if len(picked) >= pick_limit:
|
||
break
|
||
if len(picked) >= pick_limit:
|
||
break
|
||
items: list[dict[str, Any]] = []
|
||
for item in picked[:pick_limit]:
|
||
items.append(
|
||
{
|
||
"title": item.get("title", "?"),
|
||
"link": item.get("link", ""),
|
||
"source_name": item.get("source_name", "?"),
|
||
"published_fmt": item.get("published_fmt", ""),
|
||
"desc_short": _clean_text(item.get("summary", ""), 36),
|
||
"score": item.get("score"),
|
||
}
|
||
)
|
||
return items
|
||
|
||
|
||
def prepare_wecom_cn_news_items(news: dict[str, Any], *, limit: int | None = None) -> list[dict[str, Any]]:
|
||
if not news.get("enabled"):
|
||
return []
|
||
pick_limit = limit or _wecom_cn_limit()
|
||
flat = _sorted_flat(news)
|
||
preferred = ("media", "tech", "dev")
|
||
picked: list[dict[str, Any]] = []
|
||
seen_links: set[str] = set()
|
||
seen_sources: set[str] = set()
|
||
|
||
for cat in preferred:
|
||
for item in flat:
|
||
link = _normalize_link(item.get("link", ""))
|
||
source = item.get("source_name", "?")
|
||
if item.get("category_id") != cat or not link or link in seen_links or source in seen_sources:
|
||
continue
|
||
picked.append(item)
|
||
seen_links.add(link)
|
||
seen_sources.add(source)
|
||
if len(picked) >= pick_limit:
|
||
break
|
||
if len(picked) >= pick_limit:
|
||
break
|
||
|
||
if len(picked) < pick_limit:
|
||
for item in flat:
|
||
link = _normalize_link(item.get("link", ""))
|
||
if not link or link in seen_links:
|
||
continue
|
||
picked.append(item)
|
||
seen_links.add(link)
|
||
if len(picked) >= pick_limit:
|
||
break
|
||
|
||
items: list[dict[str, Any]] = []
|
||
for item in picked[:pick_limit]:
|
||
items.append(
|
||
{
|
||
"title": item.get("title", "?"),
|
||
"link": item.get("link", ""),
|
||
"source_name": item.get("source_name", "?"),
|
||
"published_fmt": item.get("published_fmt", ""),
|
||
"desc_short": _clean_text(item.get("summary", ""), 36),
|
||
"score": item.get("score"),
|
||
}
|
||
)
|
||
return items
|