pub fn span_for(range: Option<&str>, len: u64) -> Option<Span>Expand description
Decide which span to send for a Range header (or its absence).
None means unsatisfiable — answer 416. A missing or unparseable header
yields the first chunk, so a client that did not ask for a range still gets a
bounded response it can continue from, which is exactly the case the asset
protocol answered with the whole file.
TRACES: UR-071 | DR-137 | UT-127