避免原图下载查询绕过七牛缓存 #73
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Delete Branch "codex/original-download-metadata-cache-20261111"
Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?
下载前的 HEAD 查询允许七牛 CDN 使用缓存。查询超时时从七牛存储读取原文件的格式和大小,浏览器继续从 CDN 下载原文件。