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Add pause/resume methods for cloudflare socket polyfill #976

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Add pause/resume methods for cloudflare socket polyfill #976

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29 changes: 27 additions & 2 deletions cf/polyfills.js
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Original file line number Diff line number Diff line change
Expand Up @@ -139,9 +139,13 @@ function Socket() {
write,
end,
destroy,
read
read,
pause,
resume
})

let pauseState = null

return tcp

async function connect(port, host) {
Expand Down Expand Up @@ -183,6 +187,7 @@ function Socket() {
return true
}


function end(data) {
return data
? tcp.write(data, () => tcp.raw.close())
Expand All @@ -198,8 +203,12 @@ function Socket() {
try {
let done
, value
while (({ done, value } = await tcp.reader.read(), !done))
while (({ done, value } = await tcp.reader.read(), !done)) {
if (pauseState) {
await pauseState.promise
}
tcp.emit('data', Buffer.from(value))
}
} catch (err) {
error(err)
}
Expand All @@ -210,6 +219,22 @@ function Socket() {
tcp.emit('data', Buffer.from(value))
}


function pause() {
if (pauseState) return
pauseState = { }
pauseState.promise = new Promise((resolve) => {
pauseState.resolve = resolve
})
}

function resume() {
if (!pauseState) return
const s = pauseState
pauseState = null
s.resolve()
}

function error(err) {
tcp.emit('error', err)
tcp.emit('close')
Expand Down