fix: Return a synthetic response for range requests (#1555)

Fixes #1547
This commit is contained in:
sgenoud 2019-10-07 17:36:05 +02:00 committed by Nolan Lawson
parent 8f044e19c8
commit 3de7a5ba9a

View file

@ -77,6 +77,34 @@ self.addEventListener('activate', event => {
})())
})
// from https://stackoverflow.com/questions/54138601/cant-access-arraybuffer-on-rangerequest/54207122
const returnRangeRequest = request =>
fetch(request, { headers: {}, mode: 'cors', credentials: 'omit' })
.then(res => {
return res.arrayBuffer()
})
.then(arrayBuffer => {
const bytes = /^bytes=(\d+)-(\d+)?$/g.exec(request.headers.get('range'))
if (bytes) {
const start = Number(bytes[1])
const end = Number(bytes[2]) || arrayBuffer.byteLength - 1
return new self.Response(arrayBuffer.slice(start, end + 1), {
status: 206,
statusText: 'Partial Content',
headers: [
['Content-Range', `bytes ${start}-${end}/${arrayBuffer.byteLength}`]
]
})
} else {
return new self.Response(null, {
status: 416,
statusText: 'Range Not Satisfiable',
headers: [['Content-Range', `*/${arrayBuffer.byteLength}`]]
})
}
})
self.addEventListener('fetch', event => {
const req = event.request
const url = new URL(req.url)
@ -118,6 +146,13 @@ self.addEventListener('fetch', event => {
}
// for everything else, go network-only
// range request need to be be patched with a 206 response to satisfy
// Safari (https://stackoverflow.com/questions/52087208)
if (event.request.headers.get('range')) {
return returnRangeRequest(req)
}
return fetch(req)
})())
})