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implement cancellation for maplibre fetch [#1]

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Brandon Liu
2021-06-08 18:21:00 +08:00
parent 1bceca9535
commit 4936526d19
1 changed files with 6 additions and 2 deletions
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8
js/index.src.mjs
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@@ -206,18 +206,22 @@ export const addProtocol = maplibre_instance => {
let z = result[2] let z = result[2]
let x = result[3] let x = result[3]
let y = result[4] let y = result[4]
var cancel = () => {}
instance.getZxy(+z,+x,+y).then(val => { instance.getZxy(+z,+x,+y).then(val => {
if (val) { if (val) {
let headers = {'Range':'bytes=' + val[0] + '-' + (val[0]+val[1]-1)} let headers = {'Range':'bytes=' + val[0] + '-' + (val[0]+val[1]-1)}
fetch(pmtiles_url,{headers:headers}).then(resp => { const controller = new AbortController()
const signal = controller.signal
fetch(pmtiles_url,{signal:signal,headers:headers}).then(resp => {
return resp.arrayBuffer() return resp.arrayBuffer()
}).then(arr => { }).then(arr => {
callback(null,arr,null,null) callback(null,arr,null,null)
}) })
cancel = controller.abort
} else { } else {
callback(null,new Uint8Array(),null,null) callback(null,new Uint8Array(),null,null)
} }
}) })
return { cancel: () => { console.log("Cancel not implemented") } } return { cancel: cancel }
}) })
} }