[Bug]: F-22 Etags longer than 40 characters break scanning
维护者通常 1 天内回复
还没有人认领这个 Issue。
评估
- 难度
- 2/5
- 预计耗时
- 1-3 小时
- 新手友好度
- 84/100
调研方向
从 lib/private/Files/Cache/Cache.php 和 lib/private/Files/Cache/Scanner.php 开始,然后检查现有针对 etags 的单元测试覆盖情况。验证长度超过 varchar(40) 限制的值的处理,并确认扫描同一存储不会反复报告更改。完成的标准是长 etags 不再中止扫描或 PostgreSQL 事务。
由索引模型根据 Issue 内容生成。
描述
⚠️ This issue respects the following points: ⚠️
- This is not a troubleshooting question, general support matter, or webserver/proxy problem, but likely a bug (if unsure, ask the Community Help Forum).
- This issue is not already reported on Github OR solved at the Community Help Forum (I've searched!).
- I'm using a maintained major version of Nextcloud Server and tested against the latest patch level. (Supported major versions and current patch levels).
- I agree to follow Nextcloud's Code of Conduct.
- I've tried my best to provide clear reproduction steps that someone unfamiliar with this bug could use to reproduce it.
Bug description
F-22 · Etags longer than 40 characters break scanning (upstream #55638)
| Severity | Medium (scan aborts with a database error, on PostgreSQL the transaction fails) |
| Component | lib/private/Files/Cache/Cache.php, lib/private/Files/Cache/Scanner.php |
| Affects | external S3 storages whose server returns SHA-256 based ETags, and any storage with long etags |
| Upstream | https://github.com/nextcloud/server/issues/55638 |
| Verified | Unit test; the column limit is etag varchar(40) |
SQLSTATE[22001]: String data, right truncated: value too long for type character varying(40) when a
storage reports a 64 character etag.
Fix
Etags longer than 40 characters are stored as their MD5. The scanner applies the same mapping before
comparing, so a rescan does not see a change every time.
Steps to reproduce
see the top
Expected behavior
see the top
Nextcloud Server version
35
Operating system
None
PHP engine version
None
Web server
None
Database engine version
None
Is this bug present after an update or on a fresh install?
None
Are you using the Nextcloud Server Encryption module?
None
What user-backends are you using?
- Default user-backend (database)
- LDAP/ Active Directory
- SSO - SAML
- Other
Configuration report
List of activated Apps
Nextcloud Signing status
Nextcloud Logs
Additional info
No response
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