FA-214 / Protocols / Member archive

A second percent-decoding pass changes path data into syntax · case 04

A literal plus becomes a space, or a double-encoded slash unexpectedly becomes a path separator.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Decode a URL path component once using UTF-8. Preserve literal plus signs and malformed percent tokens; return None when encoded bytes are invalid UTF-8. Do not normalize paths or separators.

Why this case matters

Different decoding layers can disagree about a resource path. Keeping the decode count and plus-sign convention explicit prevents ambiguous interpretation.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
literal plus retained in path	`"aaaa b"`	`"aaaa+b"`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.