Rain-Bus
29e6797c12
- Add /admin routes for manual trigger and status inspection - Add summarizer service with batch/single summary support - Add summarize CLI command (single arxiv_id or batch pending) - Register admin router in main app - Add tests for summarizer
683 lines
21 KiB
Python
683 lines
21 KiB
Python
"""AI 总结服务 — 调用 pi CLI 生成论文中文结构化总结。"""
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from __future__ import annotations
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import asyncio
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import json
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import logging
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import re
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import shutil
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from datetime import datetime, timezone
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from pathlib import Path
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import httpx
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from pydantic import ValidationError
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from sqlalchemy import select, text
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from sqlalchemy.orm import Session, joinedload
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from app.config import settings
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from app.database import SessionLocal
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from app.models import (
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CrawlLog,
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Paper,
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PaperSummary,
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PaperTag,
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SummaryStatus,
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TaskLock,
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)
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from app.services.schemas import (
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SummarySchema,
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assess_quality,
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classify_validation_error,
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flatten_for_db,
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)
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logger = logging.getLogger(__name__)
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# ── 自定义异常 ──────────────────────────────────────────────────────────
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class PdfDownloadError(Exception):
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pass
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class PiTimeoutError(Exception):
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pass
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class PiProcessError(Exception):
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def __init__(self, returncode: int, stderr: str):
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self.returncode = returncode
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self.stderr = stderr
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super().__init__(f"pi exited with code {returncode}: {stderr[:500]}")
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class JsonNotFoundError(Exception):
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pass
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# ── 路径工具 ────────────────────────────────────────────────────────────
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_DATA_DIR = Path("data")
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_PAPERS_DIR = _DATA_DIR / "papers"
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_TMP_DIR = _DATA_DIR / "tmp"
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def _paper_dir(arxiv_id: str) -> Path:
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return _PAPERS_DIR / arxiv_id
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def _tmp_dir(arxiv_id: str) -> Path:
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return _TMP_DIR / arxiv_id
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# ── PDF 下载 ────────────────────────────────────────────────────────────
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async def _download_pdf(arxiv_id: str, pdf_url: str) -> Path:
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"""下载 PDF 到 data/tmp/{arxiv_id}/paper.pdf。"""
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if not pdf_url:
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raise PdfDownloadError(f"no pdf_url for {arxiv_id}")
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tmp = _tmp_dir(arxiv_id)
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tmp.mkdir(parents=True, exist_ok=True)
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dest = tmp / "paper.pdf"
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transport = None
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if settings.http_proxy:
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transport = httpx.AsyncHTTPTransport(proxy=settings.http_proxy)
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try:
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async with httpx.AsyncClient(
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timeout=settings.HTTP_TIMEOUT_SECONDS,
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headers={"User-Agent": settings.HTTP_USER_AGENT},
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transport=transport,
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follow_redirects=True,
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) as client:
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resp = await client.get(pdf_url)
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resp.raise_for_status()
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dest.write_bytes(resp.content)
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except Exception as exc:
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raise PdfDownloadError(f"failed to download PDF for {arxiv_id}: {exc}") from exc
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logger.info("Downloaded PDF: %s (%d bytes)", arxiv_id, dest.stat().st_size)
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return dest
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# ── meta.json ───────────────────────────────────────────────────────────
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def _write_meta_json(paper: Paper) -> Path:
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"""写入 data/papers/{arxiv_id}/meta.json，返回路径。"""
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d = _paper_dir(paper.arxiv_id)
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d.mkdir(parents=True, exist_ok=True)
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meta_path = d / "meta.json"
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authors = [a.name for a in paper.authors]
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tags = [t.tag for t in paper.tags]
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meta = {
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"arxiv_id": paper.arxiv_id,
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"title_en": paper.title_en,
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"abstract": paper.abstract or "",
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"published_at": paper.published_at.isoformat() if paper.published_at else None,
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"authors": authors,
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"tags": tags,
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"upvotes": paper.upvotes,
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}
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meta_path.write_text(json.dumps(meta, ensure_ascii=False, indent=2), encoding="utf-8")
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return meta_path
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# ── pi CLI 调用 ────────────────────────────────────────────────────────
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async def _call_pi(meta_path: Path, pdf_path: Path) -> str:
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"""调用 pi CLI 非交互模式，返回 stdout 文本。"""
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cmd = [
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settings.PI_BIN,
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"-p",
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"--no-tools",
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"--skill",
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settings.SUMMARY_SKILL,
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"请深度解读以下论文，并按指定 JSON schema 输出：",
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f"@{meta_path}",
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f"@{pdf_path}",
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]
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logger.info("Calling pi: %s %s", paper_id_from_path(meta_path), " ".join(cmd[:4]))
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proc = await asyncio.create_subprocess_exec(
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*cmd,
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stdout=asyncio.subprocess.PIPE,
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stderr=asyncio.subprocess.PIPE,
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)
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try:
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stdout, stderr = await asyncio.wait_for(
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proc.communicate(),
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timeout=settings.SUMMARY_TIMEOUT_SECONDS,
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)
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except asyncio.TimeoutError:
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proc.kill()
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await proc.wait()
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raise PiTimeoutError(
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f"pi timed out after {settings.SUMMARY_TIMEOUT_SECONDS}s"
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)
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if proc.returncode != 0:
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raise PiProcessError(proc.returncode, stderr.decode("utf-8", errors="replace"))
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return stdout.decode("utf-8", errors="replace")
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def paper_id_from_path(meta_path: Path) -> str:
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"""从 meta.json 路径反推 arxiv_id。"""
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return meta_path.parent.name
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# ── JSON 提取 ──────────────────────────────────────────────────────────
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def _extract_json(raw_output: str) -> dict:
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"""从 pi 输出中提取 JSON dict。三步策略：直接解析 → 代码块 → 最大花括号块。"""
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# 策略 1：整体直接解析
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stripped = raw_output.strip()
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try:
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result = json.loads(stripped)
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if isinstance(result, dict) and "title_zh" in result:
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return result
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except json.JSONDecodeError:
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pass
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# 策略 2：提取 ```json ... ``` 代码块
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fence_pattern = re.compile(r"```(?:json)?\s*\n(.*?)```", re.DOTALL)
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for match in fence_pattern.finditer(raw_output):
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try:
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result = json.loads(match.group(1).strip())
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if isinstance(result, dict) and "title_zh" in result:
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return result
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except json.JSONDecodeError:
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continue
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# 策略 3：匹配包含 title_zh 的最大 {...} 块
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brace_pattern = re.compile(r"\{[^{}]*\"title_zh\"[^{}]*\}", re.DOTALL)
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# 先尝试一层嵌套；如果没命中再用更宽松的策略
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for match in brace_pattern.finditer(raw_output):
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try:
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return json.loads(match.group(0))
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except json.JSONDecodeError:
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continue
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# 更宽松：找到最大的 { ... } 平衡块
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best = None
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best_len = 0
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for i, ch in enumerate(raw_output):
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if ch != "{":
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continue
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depth = 0
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for j in range(i, len(raw_output)):
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if raw_output[j] == "{":
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depth += 1
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elif raw_output[j] == "}":
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depth -= 1
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if depth == 0:
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candidate = raw_output[i : j + 1]
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if len(candidate) > best_len:
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try:
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parsed = json.loads(candidate)
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if isinstance(parsed, dict):
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best = parsed
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best_len = len(candidate)
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except json.JSONDecodeError:
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pass
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break
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if best is not None:
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return best
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raise JsonNotFoundError("no JSON object found in pi output")
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# ── 错误分类 ────────────────────────────────────────────────────────────
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def _classify_error(exc: Exception) -> str:
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"""将异常映射到 error_type 枚举值。"""
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if isinstance(exc, PdfDownloadError):
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return "pdf_download_failed"
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if isinstance(exc, PiTimeoutError):
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return "timeout"
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if isinstance(exc, PiProcessError):
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return "process_error"
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if isinstance(exc, JsonNotFoundError):
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return "json_not_found"
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if isinstance(exc, json.JSONDecodeError):
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return "json_invalid"
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if isinstance(exc, ValidationError):
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return classify_validation_error(exc)
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return "unknown"
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# ── FTS5 文本构建 ───────────────────────────────────────────────────────
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def _build_fts_summary_text(schema: SummarySchema) -> str:
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"""拼接用于 FTS5 索引的总结文本。"""
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parts = [
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schema.one_line or "",
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schema.motivation.problem or "",
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schema.motivation.goal or "",
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schema.method_overview if hasattr(schema, "method_overview") else "",
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schema.method.overview or "",
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schema.method.key_idea or "",
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" ".join(schema.results.main_findings or []),
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]
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return " ".join(p for p in parts if p)
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# ── DB 更新 ─────────────────────────────────────────────────────────────
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def _update_summary_in_db(
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db: Session,
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paper: Paper,
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schema: SummarySchema,
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quality: str,
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raw_output: str,
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) -> None:
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"""将校验后的总结写入 DB：paper_summaries + papers + paper_tags + FTS5。"""
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now = datetime.now(timezone.utc)
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# 1. paper_summaries：upsert
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existing = db.get(PaperSummary, paper.id)
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flat = flatten_for_db(schema)
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if existing:
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for k, v in flat.items():
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setattr(existing, k, v)
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else:
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db.add(PaperSummary(paper_id=paper.id, **flat))
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# 2. papers 表
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paper.title_zh = schema.title_zh
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paper.summary_quality = quality
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paper_dir = _paper_dir(paper.arxiv_id)
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paper.summary_path = str(paper_dir / "summary.json")
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paper.raw_output_path = str(paper_dir / "raw_output.txt")
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# 3. AI 标签
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existing_tag_names = {t.tag for t in paper.tags}
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for tag_name in schema.tags:
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if tag_name not in existing_tag_names:
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db.add(PaperTag(paper_id=paper.id, tag=tag_name, source="ai"))
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existing_tag_names.add(tag_name)
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# 4. FTS5 更新
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summary_text = _build_fts_summary_text(schema)
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db.execute(
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text(
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"UPDATE papers_fts SET title_zh=:title_zh, summary_text=:summary_text "
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"WHERE rowid=:paper_id"
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),
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{
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"title_zh": schema.title_zh,
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"summary_text": summary_text,
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"paper_id": paper.id,
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},
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)
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db.commit()
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logger.info("DB updated: paper=%s quality=%s", paper.arxiv_id, quality)
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# ── 文件操作 ────────────────────────────────────────────────────────────
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def _save_files(arxiv_id: str, schema: SummarySchema, raw_output: str) -> None:
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"""保存 summary.json 和 raw_output.txt。"""
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d = _paper_dir(arxiv_id)
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d.mkdir(parents=True, exist_ok=True)
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(d / "summary.json").write_text(
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schema.model_dump_json(ensure_ascii=False, indent=2),
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encoding="utf-8",
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)
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(d / "raw_output.txt").write_text(raw_output, encoding="utf-8")
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def _save_raw_output_only(arxiv_id: str, raw_output: str) -> None:
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"""仅保存 raw_output.txt（失败时）。"""
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d = _paper_dir(arxiv_id)
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d.mkdir(parents=True, exist_ok=True)
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(d / "raw_output.txt").write_text(raw_output, encoding="utf-8")
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def _cleanup_tmp(arxiv_id: str) -> None:
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"""清理 data/tmp/{arxiv_id}/ 目录。"""
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tmp = _tmp_dir(arxiv_id)
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if tmp.exists():
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try:
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shutil.rmtree(tmp)
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logger.debug("Cleaned tmp: %s", arxiv_id)
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except Exception:
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logger.warning("Failed to clean tmp for %s", arxiv_id, exc_info=True)
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# ── 单篇总结 ────────────────────────────────────────────────────────────
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async def summarize_one(
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db: Session,
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paper: Paper,
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semaphore: asyncio.Semaphore | None = None,
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*,
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force: bool = False,
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) -> dict:
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"""总结单篇论文的完整流程。"""
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arxiv_id = paper.arxiv_id
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# 获取或创建 summary_status
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if not paper.summary_status:
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db.add(SummaryStatus(paper_id=paper.id, status="pending"))
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db.commit()
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db.refresh(paper)
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status = paper.summary_status
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# 跳过已完成的（除非 force）
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if status.status == "done" and not force:
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return {"arxiv_id": arxiv_id, "status": "skipped", "reason": "already_done"}
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# 跳过 permanent_failure（除非 force）
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if status.status == "permanent_failure" and not force:
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return {"arxiv_id": arxiv_id, "status": "skipped", "reason": "permanent_failure"}
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if semaphore:
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await semaphore.acquire()
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try:
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return await _do_summarize_one(db, paper)
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finally:
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if semaphore:
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semaphore.release()
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async def _do_summarize_one(db: Session, paper: Paper) -> dict:
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"""实际的单篇总结执行（在 semaphore 保护下）。"""
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arxiv_id = paper.arxiv_id
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status = paper.summary_status
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now = datetime.now(timezone.utc)
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# 状态 → processing
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status.status = "processing"
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status.started_at = now
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db.commit()
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raw_output = ""
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try:
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# 写 meta.json
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meta_path = _write_meta_json(paper)
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# 下载 PDF
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await _download_pdf(arxiv_id, paper.pdf_url)
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# 调用 pi
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raw_output = await _call_pi(meta_path, _tmp_dir(arxiv_id) / "paper.pdf")
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# 提取 JSON
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json_data = _extract_json(raw_output)
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# Pydantic 校验
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schema = SummarySchema.model_validate(json_data)
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# 质量评估
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quality = assess_quality(schema)
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# 保存文件
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_save_files(arxiv_id, schema, raw_output)
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# 更新 DB
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_update_summary_in_db(db, paper, schema, quality, raw_output)
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# 状态 → done
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status.status = "done"
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status.quality = quality
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status.completed_at = datetime.now(timezone.utc)
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status.raw_output_saved = True
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db.commit()
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logger.info("Summarize done: %s quality=%s", arxiv_id, quality)
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return {"arxiv_id": arxiv_id, "status": "done", "quality": quality}
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except Exception as exc:
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error_type = _classify_error(exc)
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logger.error(
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"Summarize failed: %s error_type=%s %s",
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arxiv_id,
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error_type,
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str(exc)[:200],
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)
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# 保存 raw_output（如果有）
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if raw_output:
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_save_raw_output_only(arxiv_id, raw_output)
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status.raw_output_saved = True
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# 重试逻辑
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status.retry_count = (status.retry_count or 0) + 1
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status.error_type = error_type
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status.error = str(exc)[:2000]
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if status.retry_count >= settings.SUMMARY_MAX_RETRIES + 1:
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status.status = "permanent_failure"
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else:
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status.status = "pending"
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status.completed_at = datetime.now(timezone.utc)
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db.commit()
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return {
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"arxiv_id": arxiv_id,
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"status": "failed",
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"error_type": error_type,
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"error": str(exc)[:200],
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"retry_count": status.retry_count,
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}
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finally:
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_cleanup_tmp(arxiv_id)
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# ── 单篇入口 ────────────────────────────────────────────────────────────
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async def summarize_single(
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db: Session,
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arxiv_id: str,
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*,
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force: bool = True,
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_session_factory=None,
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) -> dict:
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"""单篇总结入口（供 admin 路由和 CLI 调用）。
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_session_factory: 可选的 session 工厂，测试时注入内存 DB 的 session。
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"""
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paper = (
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db.query(Paper)
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.filter(Paper.arxiv_id == arxiv_id)
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.options(
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joinedload(Paper.authors),
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joinedload(Paper.tags),
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joinedload(Paper.summary_status),
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)
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.first()
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)
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if not paper:
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return {"status": "not_found", "arxiv_id": arxiv_id}
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make_session = _session_factory or SessionLocal
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# 每篇用独立 session 避免并发问题
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paper_db = make_session()
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try:
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paper_in_new_session = (
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paper_db.query(Paper)
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.filter(Paper.arxiv_id == arxiv_id)
|
||
.options(
|
||
joinedload(Paper.authors),
|
||
joinedload(Paper.tags),
|
||
joinedload(Paper.summary_status),
|
||
)
|
||
.first()
|
||
)
|
||
result = await summarize_one(paper_db, paper_in_new_session, force=force)
|
||
finally:
|
||
paper_db.close()
|
||
|
||
return result
|
||
|
||
|
||
# ── 批量总结 ────────────────────────────────────────────────────────────
|
||
|
||
|
||
async def summarize_batch(
|
||
db: Session,
|
||
arxiv_ids: list[str] | None = None,
|
||
*,
|
||
_session_factory=None,
|
||
) -> dict:
|
||
"""批量总结入口。arxiv_ids=None 时处理所有 pending 论文。
|
||
|
||
_session_factory: 可选的 session 工厂，测试时注入内存 DB 的 session。
|
||
"""
|
||
now = datetime.now(timezone.utc)
|
||
|
||
# TaskLock 防重入
|
||
lock = TaskLock(
|
||
task="summarize",
|
||
lock_key="batch",
|
||
status="running",
|
||
owner="summarize_batch",
|
||
acquired_at=now,
|
||
)
|
||
try:
|
||
db.add(lock)
|
||
db.commit()
|
||
except Exception:
|
||
db.rollback()
|
||
logger.warning("Summarize batch already running (lock conflict)")
|
||
return {"status": "conflict", "error": "summarize batch already running"}
|
||
|
||
# CrawlLog
|
||
log_entry = CrawlLog(
|
||
task="summarize",
|
||
status="running",
|
||
started_at=now,
|
||
)
|
||
db.add(log_entry)
|
||
db.commit()
|
||
|
||
try:
|
||
# 查询待总结论文
|
||
query = db.query(Paper).options(
|
||
joinedload(Paper.authors),
|
||
joinedload(Paper.tags),
|
||
joinedload(Paper.summary_status),
|
||
)
|
||
if arxiv_ids:
|
||
query = query.filter(Paper.arxiv_id.in_(arxiv_ids))
|
||
else:
|
||
# 只处理 pending 或 failed（可重试的）
|
||
query = query.join(SummaryStatus).filter(
|
||
SummaryStatus.status.in_(["pending", "failed"])
|
||
)
|
||
|
||
papers = query.all()
|
||
total = len(papers)
|
||
logger.info("Summarize batch: %d papers to process", total)
|
||
|
||
if total == 0:
|
||
log_entry.status = "success"
|
||
log_entry.papers_found = 0
|
||
log_entry.papers_new = 0
|
||
log_entry.completed_at = datetime.now(timezone.utc)
|
||
_release_lock(db, lock)
|
||
return {"status": "success", "done": 0, "failed": 0, "skipped": 0, "total": 0}
|
||
|
||
# 并发控制
|
||
semaphore = asyncio.Semaphore(settings.SUMMARY_CONCURRENCY)
|
||
make_session = _session_factory or SessionLocal
|
||
|
||
async def _process_paper(paper: Paper) -> dict:
|
||
paper_db = make_session()
|
||
try:
|
||
p = (
|
||
paper_db.query(Paper)
|
||
.filter(Paper.id == paper.id)
|
||
.options(
|
||
joinedload(Paper.authors),
|
||
joinedload(Paper.tags),
|
||
joinedload(Paper.summary_status),
|
||
)
|
||
.first()
|
||
)
|
||
return await summarize_one(paper_db, p, semaphore)
|
||
finally:
|
||
paper_db.close()
|
||
|
||
results = await asyncio.gather(
|
||
*[_process_paper(p) for p in papers],
|
||
return_exceptions=True,
|
||
)
|
||
|
||
# 统计结果
|
||
done = 0
|
||
failed = 0
|
||
skipped = 0
|
||
for r in results:
|
||
if isinstance(r, Exception):
|
||
logger.error("Unexpected error in batch: %s", r)
|
||
failed += 1
|
||
elif isinstance(r, dict):
|
||
if r.get("status") == "done":
|
||
done += 1
|
||
elif r.get("status") == "skipped":
|
||
skipped += 1
|
||
else:
|
||
failed += 1
|
||
|
||
log_entry.status = "success" if failed == 0 else "failed"
|
||
log_entry.papers_found = total
|
||
log_entry.papers_new = done
|
||
log_entry.completed_at = datetime.now(timezone.utc)
|
||
db.commit()
|
||
|
||
logger.info(
|
||
"Summarize batch done: total=%d done=%d failed=%d skipped=%d",
|
||
total, done, failed, skipped,
|
||
)
|
||
return {
|
||
"status": "success" if failed == 0 else "partial",
|
||
"total": total,
|
||
"done": done,
|
||
"failed": failed,
|
||
"skipped": skipped,
|
||
}
|
||
|
||
except Exception as exc:
|
||
logger.exception("Summarize batch failed")
|
||
log_entry.status = "failed"
|
||
log_entry.error = str(exc)[:2000]
|
||
log_entry.completed_at = datetime.now(timezone.utc)
|
||
db.commit()
|
||
return {"status": "failed", "error": str(exc)}
|
||
|
||
finally:
|
||
_release_lock(db, lock)
|
||
|
||
|
||
def _release_lock(db: Session, lock: TaskLock) -> None:
|
||
"""释放 TaskLock。"""
|
||
try:
|
||
lock.status = "finished"
|
||
lock.released_at = datetime.now(timezone.utc)
|
||
db.commit()
|
||
except Exception:
|
||
db.rollback()
|
||
logger.warning("Failed to release summarize lock", exc_info=True)
|