318 lines
11 KiB
Python
318 lines
11 KiB
Python
"""海报后台任务管理。
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使用与 PPT parse_worker 相同的后台线程 + Redis 锁模式。
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任务状态通过数据库字段追踪，前端轮询获取进度。
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"""
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import json
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import logging
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import re
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import threading
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import uuid
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import os
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from datetime import datetime
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from insurance.db.compat import db
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logger = logging.getLogger(__name__)
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_local_locks: set = set()
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_local_locks_guard = threading.Lock()
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_redis_locks: set = set()
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# 超过此时间仍为 queued/generating 的任务视为过期（秒）
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STALE_TASK_TIMEOUT = 600 # 10 分钟
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def recover_stale_tasks():
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"""启动时恢复过期任务：将长时间 queued/generating 的任务标记为 failed。
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应在应用启动时调用。
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"""
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from insurance.models.poster_record import PosterRecord
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from insurance.models.poster_case_upload import PosterCaseUpload
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cutoff = datetime.now().timestamp() - STALE_TASK_TIMEOUT
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# 恢复过期的海报生成任务
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stale_records = PosterRecord.query.filter(
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PosterRecord.task_status.in_(["queued", "generating"]),
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PosterRecord.created_at < datetime.fromtimestamp(cutoff),
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).all()
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for record in stale_records:
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record.task_status = "failed"
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record.task_error = "任务因服务重启而中断，请重新生成"
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record.finished_at = datetime.now()
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logger.warning(f"恢复过期海报任务: record_id={record.id}")
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# 恢复过期的计划书解析任务
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stale_cases = PosterCaseUpload.query.filter(
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PosterCaseUpload.parse_status.in_(["queued", "parsing"]),
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PosterCaseUpload.created_at < datetime.fromtimestamp(cutoff),
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).all()
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for case in stale_cases:
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case.parse_status = "failed"
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logger.warning(f"恢复过期解析任务: case_id={case.id}")
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if stale_records or stale_cases:
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db.session.commit()
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logger.info(f"已恢复 {len(stale_records)} 个海报任务, {len(stale_cases)} 个解析任务")
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# ─── 计划书解析任务 ───────────────────────────────────────
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def start_case_parse_task(app, case_upload_id: int) -> bool:
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"""启动后台计划书解析任务，返回是否新启动。"""
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lock_key = f"poster_case_parse:{case_upload_id}"
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if not _acquire_lock(lock_key):
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return False
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thread = threading.Thread(
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target=_run_case_parse_task,
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args=(app, case_upload_id, lock_key),
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daemon=True,
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)
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thread.start()
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return True
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def _run_case_parse_task(app, case_upload_id: int, lock_key: str):
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with app.app_context():
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try:
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_execute_case_parse(case_upload_id)
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except Exception as exc:
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logger.error(f"计划书解析任务失败 [{case_upload_id}]: {exc}", exc_info=True)
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_mark_case_failed(case_upload_id, str(exc))
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finally:
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_release_lock(lock_key)
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db.session.remove()
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def _execute_case_parse(case_upload_id: int):
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from insurance.models.poster_case_upload import PosterCaseUpload
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record = PosterCaseUpload.query.get(case_upload_id)
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if not record:
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return
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filepath = record.source_file_url
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if not filepath or not os.path.exists(filepath):
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record.parse_status = "failed"
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db.session.commit()
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return
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record.parse_status = "parsing"
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db.session.commit()
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from insurance.ppt.extraction import ExtractionOrchestrator
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orchestrator = ExtractionOrchestrator(use_cache=False)
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import asyncio
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parsed = asyncio.run(orchestrator.extract_for_poster(filepath))
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record = PosterCaseUpload.query.get(case_upload_id)
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if not record:
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return
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record.parsed_data = json.dumps(parsed, ensure_ascii=False)
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record.parse_status = "parsed"
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db.session.commit()
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def _mark_case_failed(case_upload_id: int, error: str):
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from insurance.models.poster_case_upload import PosterCaseUpload
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record = PosterCaseUpload.query.get(case_upload_id)
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if not record:
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return
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record.parse_status = "failed"
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db.session.commit()
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# ─── 海报图片生成任务 ──────────────────────────────────────
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def start_poster_generate_task(app, record_id: int, user_id: str, data: dict) -> bool:
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"""启动后台海报图片生成任务，返回是否新启动。"""
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lock_key = f"poster_generate:{record_id}"
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if not _acquire_lock(lock_key):
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return False
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thread = threading.Thread(
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target=_run_poster_generate_task,
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args=(app, record_id, user_id, data, lock_key),
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daemon=True,
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)
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thread.start()
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return True
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def _run_poster_generate_task(app, record_id: int, user_id: str, data: dict, lock_key: str):
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with app.app_context():
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try:
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_execute_poster_generate(record_id, user_id, data)
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except Exception as exc:
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logger.error(f"海报生成任务失败 [{record_id}]: {exc}", exc_info=True)
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_mark_poster_failed(record_id, str(exc))
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finally:
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_release_lock(lock_key)
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db.session.remove()
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def _execute_poster_generate(record_id: int, user_id: str, data: dict):
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from insurance.models.poster_record import PosterRecord
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from insurance.models.poster_template_model import PosterTemplate
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from insurance.models.ppt_config import PptProduct, PptCompany
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record = PosterRecord.query.get(record_id)
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if not record:
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return
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record.task_status = "generating"
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record.task_progress = 10
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record.started_at = datetime.now()
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db.session.commit()
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template_id = data.get("templateId")
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product_id = data.get("productId")
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copy_content = data.get("copyContent", {})
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size = data.get("size", "1024x1792")
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reference_image = data.get("referenceImage")
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use_masked_data = bool(data.get("useMaskedData"))
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# 获取模板和产品信息
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poster_template = PosterTemplate.query.get(template_id) if template_id else None
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product = PptProduct.query.get(product_id) if product_id else None
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company = PptCompany.query.get(product.company_id) if product else None
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# 脱敏处理
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if use_masked_data:
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from insurance.ppt.masking import apply_product_mask, apply_company_mask, mask_text
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product_dict = product.to_dict() if product else None
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company_dict = company.to_dict() if company else None
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if product_dict:
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apply_product_mask(product_dict, True)
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if company_dict:
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apply_company_mask(company_dict, True)
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# 替换 copy_content 中的产品名和保司名
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if product and company:
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real_name = product.display_name
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masked_name = (product_dict or {}).get("displayName", "")
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real_company = company.display_name
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masked_company = (company_dict or {}).get("displayName", "")
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replacements = {}
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if real_name and masked_name and real_name != masked_name:
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replacements[real_name] = masked_name
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if real_company and masked_company and real_company != masked_company:
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replacements[real_company] = masked_company
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if replacements:
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for key in copy_content:
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if isinstance(copy_content[key], str):
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copy_content[key] = mask_text(copy_content[key], replacements)
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else:
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product_dict = product.to_dict() if product else None
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company_dict = {"displayName": company.display_name} if company else None
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record.task_progress = 30
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db.session.commit()
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# 组装 prompt
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from insurance.poster.image_generator import PosterImageGenerator
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generator = PosterImageGenerator()
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prompt = generator.build_prompt(
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template=poster_template.to_dict() if poster_template else None,
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product=product_dict,
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company=company_dict,
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copy=copy_content,
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size=size,
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)
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record.task_progress = 50
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db.session.commit()
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# 生成图片
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generation_mode = "ai"
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provider_info = {}
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try:
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image_bytes, provider_info = generator.generate(prompt, size=size, reference_image=reference_image)
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except Exception as e:
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logger.warning(f"图片 API 失败，使用降级方案: {e}")
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from insurance.poster.image_generator import generate_fallback
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image_bytes = generate_fallback(copy_content, size=size)
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generation_mode = "fallback"
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record.task_progress = 80
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db.session.commit()
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# 保存文件（使用持久化存储）
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from insurance.config import get_storage_root
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output_dir = os.path.join(get_storage_root(), "outputs", "posters")
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os.makedirs(output_dir, exist_ok=True)
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safe_uid = re.sub(r'[/\\.]', '_', user_id)
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filename = f"poster_{safe_uid}_{uuid.uuid4().hex[:8]}.png"
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filepath = os.path.join(output_dir, filename)
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with open(filepath, "wb") as f:
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f.write(image_bytes)
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# 更新记录
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record = PosterRecord.query.get(record_id)
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if not record:
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return
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record.export_url = filepath
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record.export_format = "png"
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record.generation_mode = generation_mode
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record.image_provider = provider_info.get("provider", "")
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record.image_model = provider_info.get("model", "")
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record.prompt_used = prompt[:2000] if prompt else None
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record.task_status = "done"
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record.task_progress = 100
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record.finished_at = datetime.now()
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db.session.commit()
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def _mark_poster_failed(record_id: int, error: str):
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from insurance.models.poster_record import PosterRecord
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record = PosterRecord.query.get(record_id)
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if not record:
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return
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record.task_status = "failed"
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record.task_error = error[:1000]
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record.task_progress = 100
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record.finished_at = datetime.now()
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db.session.commit()
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# ─── 锁管理 ────────────────────────────────────────────────
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def _acquire_lock(key: str) -> bool:
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"""获取任务锁（优先 Redis，降级本地内存）。"""
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redis_key = f"poster_task_lock:{key}"
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try:
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from insurance.db.compat import redis_client
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if redis_client and redis_client.set(redis_key, "1", nx=True, ex=1800):
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_redis_locks.add(key)
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return True
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if redis_client:
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return False
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except Exception:
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pass
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with _local_locks_guard:
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if key in _local_locks:
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return False
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_local_locks.add(key)
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return True
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def _release_lock(key: str):
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"""释放任务锁。"""
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if key in _redis_locks:
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try:
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from insurance.db.compat import redis_client
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if redis_client:
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redis_client.delete(f"poster_task_lock:{key}")
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except Exception:
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pass
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_redis_locks.discard(key)
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with _local_locks_guard:
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_local_locks.discard(key)
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