RangeRequestsPlugin

The range request plugin makes it easy for a request with a 'Range' header to be fulfilled by a cached response.

It does this by intercepting the cachedResponseWillBeUsed plugin callback and returning the appropriate subset of the cached response body.

createPartialResponse

createPartialResponse(request, originalResponse) returns Promise containing Response

Given a Request and Response objects as input, this will return a promise for a new Response.

If the original Response already contains partial content (i.e. it has a status of 206), then this assumes it already fulfills the Range: requirements, and will return it as-is.

Returns

Promise containing Response Either a 206 Partial Content response, with the response body set to the slice of content specified by the request's Range: header, or a 416 Range Not Satisfiable response if the conditions of the Range: header can't be met.