Skip to content
Closed
Changes from 3 commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
49 changes: 40 additions & 9 deletions lib/internal/streams/pipeline.js
Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
const {
ArrayIsArray,
SymbolAsyncIterator,
Promise,
} = primordials;

let eos;
Expand All @@ -16,18 +17,21 @@ const {
ERR_INVALID_ARG_TYPE,
ERR_INVALID_RETURN_VALUE,
ERR_MISSING_ARGS,
ERR_STREAM_DESTROYED
ERR_STREAM_DESTROYED,
ERR_STREAM_PREMATURE_CLOSE
} = require('internal/errors').codes;

const { validateCallback } = require('internal/validators');

function noop() {}

const {
isIterable,
isReadable,
isStream,
} = require('internal/streams/utils');
const assert = require('internal/assert');

let EE;
let PassThrough;
let Readable;

Expand Down Expand Up @@ -102,25 +106,52 @@ async function* fromReadable(val) {
}

async function pump(iterable, writable, finish) {
if (!EE) {
EE = require('events');
}
let error;
let callback = noop;
const resume = (err) => {
if (!error && err) {
error = err;
}
const _callback = callback;
callback = noop;
_callback();
};
const onClose = () => {
resume(new ERR_STREAM_PREMATURE_CLOSE());
};

const waitForDrain = () => new Promise((resolve) => {
assert(callback === noop);
if (error || writable.destroyed) {
resolve();
} else {
callback = resolve;
}
});

writable
.on('drain', resume)
.on('error', resume)
.on('close', onClose);

try {
if (writable.writableNeedDrain === true) {
await EE.once(writable, 'drain');
if (writable.writableNeedDrain) {
await waitForDrain();
}

for await (const chunk of iterable) {
if (!writable.write(chunk)) {
if (writable.destroyed) return;
await EE.once(writable, 'drain');
await waitForDrain();
}
}
writable.end();
} catch (err) {
error = err;
} finally {
writable
.off('drain', resume)
.off('error', resume)
.off('close', onClose);
finish(error);
}
}
Expand Down