FA-26414 / HTTP ranges / Member archive
Range negotiation preserves preexisting Vary dimensions · case 04
Range negotiation preserves preexisting Vary dimensions.
Case contract
Return sorted unique Vary names, adding accept-encoding when negotiated by encoding. Existing names are already lowercase.
Why this case matters
Range responses combine representation identity, conditional requests, framing, and partial-object state.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| variant-vary-union fixture 0 | ["accept-encoding"] | ["accept-encoding", "accept-language"] | Failed |
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