chenshuobo
32266742b5
feat(meituan-coupon): 采集记录头图大小/类型 + 读取侧缩放口子 + 回填脚本
- meituan_coupon 加 image_size(字节)/image_type(MIME)两列 + alembic 迁移(nullable,不动存量)
- ETL 每城抓完后按 head_url 去重并发 HEAD 回填两列(失败→NULL 不阻断,实测 +~9s/城)
- 读取侧 feed_image_url 口子:按 image_size 阈值决定是否给图 URL 拼缩放参数(124dp+WebP,
实测省 76–99%);阈值默认 None=passthrough、行为不变,待产品定阈值
- upsert update 列自动含两列,重抓即回填,无需手动 backfill;附 deploy/backfill_image_meta.sh
供上线后服务器手动全量回填一次
验证:迁移 upgrade + 口子单测 + 本地全量 359 城重跑(727094 行、99.99% 填充;
GIF 仅 708 张但 avg 4.8MB/max 10MB,印证长尾)
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