field Registered
Verified 2026-09-18 · registry updated
2026-08-28If-Range
Makes a range request conditional on a validator matching.
Use If-Range to resume a download only when the selected representation is still the same; otherwise send the complete representation.
httpheaderrangedownloads
Reference (http)
Range: bytes=1000-1999 If-Range: "video-v4"
Use If-Range to resume a download only when the selected representation is still the same; otherwise send the complete representation.
Common mistakes
- Combining a range from an old representation with bytes from a new one.
IANA registry: http-fields/field-names
Registry reference: RFC 9110, Section 13.1.5: HTTP Semantics