/
sw.js
34 lines (28 loc) · 881 Bytes
/
sw.js
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function registerWasmHTTPListener(wasm, { base, args = [] } = {}) {
let path = new URL(registration.scope).pathname
if (base && base !== '') path = `${trimEnd(path, '/')}/${trimStart(base, '/')}`
const handlerPromise = new Promise(setHandler => {
self.wasmhttp = {
path,
setHandler,
}
})
const go = new Go()
go.argv = [wasm, ...args]
WebAssembly.instantiateStreaming(fetch(wasm), go.importObject).then(({ instance }) => go.run(instance))
addEventListener('fetch', e => {
const { pathname } = new URL(e.request.url)
if (!pathname.startsWith(path)) return
e.respondWith(handlerPromise.then(handler => handler(e.request)))
})
}
function trimStart(s, c) {
let r = s
while (r.startsWith(c)) r = r.slice(c.length)
return r
}
function trimEnd(s, c) {
let r = s
while (r.endsWith(c)) r = r.slice(0, -c.length)
return r
}