If-Range

If-Range

 

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The If-Range header, like all the If headers, can be used to make a request conditional. It is used when an application has a copy of a range of a resource, to revalidate the range or get the complete resource if the range is no longer valid. Chapter 7discusses conditional requests in detail.

Type

Request header

Basic Syntax

If-Range: (HTTP-date | entity-tag)

Examples

If-Range: Tue, 3 Oct 1997 02:15:31 GMT

If-Range: "11e92a-457b-3134b5aa"