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destroy.js
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destroy.js
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'use strict';
// Backwards compat. cb() is undocumented and unused in core but
// unfortunately might be used by modules.
function destroy(err, cb) {
const r = this._readableState;
const w = this._writableState;
if ((w && w.destroyed) || (r && r.destroyed)) {
if (typeof cb === 'function') {
cb();
}
return this;
}
if (err) {
// Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
err.stack;
if (w && !w.errored) {
w.errored = err;
}
if (r && !r.errored) {
r.errored = err;
}
}
// We set destroyed to true before firing error callbacks in order
// to make it re-entrance safe in case destroy() is called within callbacks
if (w) {
w.destroyed = true;
}
if (r) {
r.destroyed = true;
}
this._destroy(err || null, (err) => {
if (err) {
// Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
err.stack;
if (w && !w.errored) {
w.errored = err;
}
if (r && !r.errored) {
r.errored = err;
}
}
if (w) {
w.closed = true;
}
if (r) {
r.closed = true;
}
if (typeof cb === 'function') {
cb(err);
}
if (err) {
process.nextTick(emitErrorCloseNT, this, err);
} else {
process.nextTick(emitCloseNT, this);
}
});
return this;
}
function emitErrorCloseNT(self, err) {
emitErrorNT(self, err);
emitCloseNT(self);
}
function emitCloseNT(self) {
const r = self._readableState;
const w = self._writableState;
if (r) {
r.closeEmitted = true;
}
if ((w && w.emitClose) || (r && r.emitClose)) {
self.emit('close');
}
}
function emitErrorNT(self, err) {
const r = self._readableState;
const w = self._writableState;
if ((w && w.errorEmitted) || (r && r.errorEmitted)) {
return;
}
if (w) {
w.errorEmitted = true;
}
if (r) {
r.errorEmitted = true;
}
self.emit('error', err);
}
function undestroy() {
const r = this._readableState;
const w = this._writableState;
if (r) {
r.closed = false;
r.closeEmitted = false;
r.destroyed = false;
r.errored = null;
r.errorEmitted = false;
r.reading = false;
r.ended = false;
r.endEmitted = false;
}
if (w) {
w.closed = false;
w.closeEmitted = false;
w.destroyed = false;
w.errored = null;
w.ended = false;
w.ending = false;
w.finalCalled = false;
w.prefinished = false;
w.finished = false;
w.errorEmitted = false;
}
}
function errorOrDestroy(stream, err, sync) {
// We have tests that rely on errors being emitted
// in the same tick, so changing this is semver major.
// For now when you opt-in to autoDestroy we allow
// the error to be emitted nextTick. In a future
// semver major update we should change the default to this.
const r = stream._readableState;
const w = stream._writableState;
if ((w && w.destroyed) || (r && r.destroyed)) {
return this;
}
if ((r && r.autoDestroy) || (w && w.autoDestroy))
stream.destroy(err);
else if (err) {
// Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
err.stack;
if (w && !w.errored) {
w.errored = err;
}
if (r && !r.errored) {
r.errored = err;
}
if (sync) {
process.nextTick(emitErrorNT, stream, err);
} else {
emitErrorNT(stream, err);
}
}
}
function isRequest(stream) {
return stream && stream.setHeader && typeof stream.abort === 'function';
}
// Normalize destroy for legacy.
function destroyer(stream, err) {
if (isRequest(stream)) return stream.abort();
if (isRequest(stream.req)) return stream.req.abort();
if (typeof stream.destroy === 'function') return stream.destroy(err);
if (typeof stream.close === 'function') return stream.close();
}
module.exports = {
destroyer,
destroy,
undestroy,
errorOrDestroy
};