Review CODE-REVIEW-225-r1.
M1: urlsplit(url).path was trusted even when the url carried a scheme or an
authority, so "https://evil.example/houseplan_files/files/m1/doc.pdf"
resolved onto a local file while _looks_internal kept calling it external —
the mirror image of the inconsistency this resolver exists to prevent. Only a
same-document reference is resolved by its path now.
M2: the three mutants the spec described are registered in
scripts/mutation-gate.mjs instead of living as a one-off manual run. The
traversal entry drops both structural checks at once on purpose: taken one at
a time the defence is layered (sanitize_marker_id turns ".." into "misc") and
the mutant would be equivalent — established by running it.
Issue: #225
User-Visible: no
A backup holding a PDF attachment could not be imported back: legacy links
carry a cache-buster (".../files/m1/doc.pdf?v=1783170649"), and the resolver
compared the raw tail with its sanitized form, so the query made the name
differ from itself. The reference then read as internal by prefix and
non-canonical by name, which is exactly the combination _content_state must
refuse — every such document failed with invalid_content.
Parse the url as a url: the path addresses the file, the query and the
fragment address the transfer. Path segments keep doing the guarding, so
dropping the query cannot widen what a segment is allowed to be.
Issue: #225
User-Visible: yes
Matysh