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destroy.js
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'use strict'
/* replacement start */
const process = require('process/')
/* replacement end */
const {
aggregateTwoErrors,
codes: { ERR_MULTIPLE_CALLBACK },
AbortError
} = require('../../ours/errors')
const { Symbol } = require('../../ours/primordials')
const { kIsDestroyed, isDestroyed, isFinished, isServerRequest } = require('./utils')
const kDestroy = Symbol('kDestroy')
const kConstruct = Symbol('kConstruct')
function checkError(err, w, r) {
if (err) {
// Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
err.stack // eslint-disable-line no-unused-expressions
if (w && !w.errored) {
w.errored = err
}
if (r && !r.errored) {
r.errored = err
}
}
}
// 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
// With duplex streams we use the writable side for state.
const s = w || r
if ((w !== null && w !== undefined && w.destroyed) || (r !== null && r !== undefined && r.destroyed)) {
if (typeof cb === 'function') {
cb()
}
return this
}
// We set destroyed to true before firing error callbacks in order
// to make it re-entrance safe in case destroy() is called within callbacks
checkError(err, w, r)
if (w) {
w.destroyed = true
}
if (r) {
r.destroyed = true
}
// If still constructing then defer calling _destroy.
if (!s.constructed) {
this.once(kDestroy, function (er) {
_destroy(this, aggregateTwoErrors(er, err), cb)
})
} else {
_destroy(this, err, cb)
}
return this
}
function _destroy(self, err, cb) {
let called = false
function onDestroy(err) {
if (called) {
return
}
called = true
const r = self._readableState
const w = self._writableState
checkError(err, w, r)
if (w) {
w.closed = true
}
if (r) {
r.closed = true
}
if (typeof cb === 'function') {
cb(err)
}
if (err) {
process.nextTick(emitErrorCloseNT, self, err)
} else {
process.nextTick(emitCloseNT, self)
}
}
try {
self._destroy(err || null, onDestroy)
} catch (err) {
onDestroy(err)
}
}
function emitErrorCloseNT(self, err) {
emitErrorNT(self, err)
emitCloseNT(self)
}
function emitCloseNT(self) {
const r = self._readableState
const w = self._writableState
if (w) {
w.closeEmitted = true
}
if (r) {
r.closeEmitted = true
}
if ((w !== null && w !== undefined && w.emitClose) || (r !== null && r !== undefined && r.emitClose)) {
self.emit('close')
}
}
function emitErrorNT(self, err) {
const r = self._readableState
const w = self._writableState
if ((w !== null && w !== undefined && w.errorEmitted) || (r !== null && r !== undefined && 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.constructed = true
r.closed = false
r.closeEmitted = false
r.destroyed = false
r.errored = null
r.errorEmitted = false
r.reading = false
r.ended = r.readable === false
r.endEmitted = r.readable === false
}
if (w) {
w.constructed = true
w.destroyed = false
w.closed = false
w.closeEmitted = false
w.errored = null
w.errorEmitted = false
w.finalCalled = false
w.prefinished = false
w.ended = w.writable === false
w.ending = w.writable === false
w.finished = w.writable === 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 !== null && w !== undefined && w.destroyed) || (r !== null && r !== undefined && r.destroyed)) {
return this
}
if ((r !== null && r !== undefined && r.autoDestroy) || (w !== null && w !== undefined && w.autoDestroy))
stream.destroy(err)
else if (err) {
// Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
err.stack // eslint-disable-line no-unused-expressions
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 construct(stream, cb) {
if (typeof stream._construct !== 'function') {
return
}
const r = stream._readableState
const w = stream._writableState
if (r) {
r.constructed = false
}
if (w) {
w.constructed = false
}
stream.once(kConstruct, cb)
if (stream.listenerCount(kConstruct) > 1) {
// Duplex
return
}
process.nextTick(constructNT, stream)
}
function constructNT(stream) {
let called = false
function onConstruct(err) {
if (called) {
errorOrDestroy(stream, err !== null && err !== undefined ? err : new ERR_MULTIPLE_CALLBACK())
return
}
called = true
const r = stream._readableState
const w = stream._writableState
const s = w || r
if (r) {
r.constructed = true
}
if (w) {
w.constructed = true
}
if (s.destroyed) {
stream.emit(kDestroy, err)
} else if (err) {
errorOrDestroy(stream, err, true)
} else {
process.nextTick(emitConstructNT, stream)
}
}
try {
stream._construct((err) => {
process.nextTick(onConstruct, err)
})
} catch (err) {
process.nextTick(onConstruct, err)
}
}
function emitConstructNT(stream) {
stream.emit(kConstruct)
}
function isRequest(stream) {
return (stream === null || stream === undefined ? undefined : stream.setHeader) && typeof stream.abort === 'function'
}
function emitCloseLegacy(stream) {
stream.emit('close')
}
function emitErrorCloseLegacy(stream, err) {
stream.emit('error', err)
process.nextTick(emitCloseLegacy, stream)
}
// Normalize destroy for legacy.
function destroyer(stream, err) {
if (!stream || isDestroyed(stream)) {
return
}
if (!err && !isFinished(stream)) {
err = new AbortError()
}
// TODO: Remove isRequest branches.
if (isServerRequest(stream)) {
stream.socket = null
stream.destroy(err)
} else if (isRequest(stream)) {
stream.abort()
} else if (isRequest(stream.req)) {
stream.req.abort()
} else if (typeof stream.destroy === 'function') {
stream.destroy(err)
} else if (typeof stream.close === 'function') {
// TODO: Don't lose err?
stream.close()
} else if (err) {
process.nextTick(emitErrorCloseLegacy, stream, err)
} else {
process.nextTick(emitCloseLegacy, stream)
}
if (!stream.destroyed) {
stream[kIsDestroyed] = true
}
}
module.exports = {
construct,
destroyer,
destroy,
undestroy,
errorOrDestroy
}