Range Requests

Range requests let a client retrieve part of a representation.

Use Range with Accept-Ranges and Content-Range for resumable downloads, media seeking, and large-file reads. Return 206 for a satisfiable range and 416 for an invalid one.

httpdownloadsmediapartial-content

Reference (http)

Range: bytes=1000-1999

HTTP/1.1 206 Partial Content
Content-Range: bytes 1000-1999/5000

Use Range with Accept-Ranges and Content-Range for resumable downloads, media seeking, and large-file reads. Return 206 for a satisfiable range and 416 for an invalid one.

Common mistakes

Combining ranges from different representation versions or treating a range request as an authorization check.

Sources

MDN HTTP Reference