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Multipart boundary parameter parsing: quoted escapes preserve the escaped character · case 04

Multipart boundary parameter parsing: quoted escapes preserve the escaped character.

Member previewVariant 4 · 3 implementations · 18 checks per implementation

Case contract

Parse a bounded Content-Type string with semicolon-separated parameters, quoted strings and backslash escapes inside quotes. Require multipart/byteranges (case-insensitive) and exactly one boundary parameter, with 1..12 ASCII printable characters excluding CR/LF. Other parameters ignored. Unbalanced quotes or dangling quoted escapes reject. Input x is the field string.

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
quoted-escape fixture 1	`"a\\\"b"`	`"a\"b"`	Failed

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