Answers GET requests with an Accept-Ranges: bytes header and converts HttpResponses coming back from its inner route into partial responses if the initial request contained a valid Range request header. The requested byte-ranges may be coalesced. This directive is transparent to non-GET requests Rejects requests with unsatisfiable ranges UnsatisfiableRangeRejection. Rejects requests with too many expected ranges.

Note: if you want to combine this directive with conditional(...) you need to put it on the *inside* of the conditional(...) directive, i.e. conditional(...) must be on a higher level in your route structure in order to function correctly.