FA-27022 / HTTP ranges / Member archive

A client serializes a typed range request plan: an empty selector plan emits no conditional range field · case 02

A client serializes a typed range request plan: an empty selector plan emits no conditional range field.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Input x contains selectors [kind,a,b], validator [tag|date,value] or null, and accept encoding policy. Closed selectors serialize a-b, open selectors a-, suffix selectors -a, in input order. Empty selectors omit Range and If-Range. Tag validators are quoted opaque ASCII strings without quotes/backslashes; dates are already formatted and remain unquoted. Identity-only policy emits Accept-Encoding identity. Return ordered [header,value] pairs.

Why this case matters

Range responses combine representation identity, conditional requests, framing, and partial-object state.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
empty-request fixture 2	`[["Range", "bytes="], ["If-Range", "\"rev\""]]`	`[]`	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.