fix: harden Web image admission

This commit is contained in:
Tianyi Cui
2026-07-30 01:58:36 +08:00
parent d6c82001b3
commit 515d48875e
52 changed files with 999 additions and 444 deletions

View File

@@ -2,7 +2,7 @@
English | [中文](README.zh.md)
The private local implementation of [`@deepseek-ai/dsh-attachment`](../attachment). Objects land at `<DSH_HOME>/attachments/v1/objects/<sha256-prefix>/<sha256>` and are addressed by an opaque `sha256:` id. Writes use a private staging directory, owner-only files, a synced temporary file, an atomic exclusive hard-link publish, and a directory sync on the publication directories (POSIX; Windows relies on filesystem metadata journaling) so the reported reference survives a crash; reads re-check the digest, media signature, dimensions, and logged metadata. Byte and pixel limits are write-time admission policy, so a later policy reduction does not make already-admitted history unreadable.
The private local implementation of [`@deepseek-ai/dsh-attachment`](../attachment). Objects land at `<DSH_HOME>/attachments/v1/objects/<sha256-prefix>/<sha256>` and are addressed by an opaque `sha256:` id. Writes use a private staging directory, owner-only files, a synced temporary file, an atomic exclusive hard-link publish, and a directory sync on the publication directories (POSIX; Windows relies on filesystem metadata journaling) so the reported reference survives a crash. Write admission and reads fully decode the raster before accepting its format and dimensions; reads also re-check the digest and logged metadata. Byte and pixel limits are write-time admission policy, so a later policy reduction does not make already-admitted history unreadable.
`DSH_HOME` resolves through the shared path policy: explicit config, `$DSH_HOME`, then `~/.dsh`. Session logs contain only the reference and verified metadata, never this host path.