mirror of https://github.com/jkjoy/sunpeiwen.git
58 lines
1.0 KiB
JavaScript
58 lines
1.0 KiB
JavaScript
|
const { RequestAbortedError } = require('../core/errors')
|
||
|
|
|
||
|
|
const kListener = Symbol('kListener')
|
||
|
|
const kSignal = Symbol('kSignal')
|
||
|
|
|
||
|
|
function abort (self) {
|
||
|
|
if (self.abort) {
|
||
|
|
self.abort()
|
||
|
|
} else {
|
||
|
|
self.onError(new RequestAbortedError())
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function addSignal (self, signal) {
|
||
|
|
self[kSignal] = null
|
||
|
|
self[kListener] = null
|
||
|
|
|
||
|
|
if (!signal) {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
if (signal.aborted) {
|
||
|
|
abort(self)
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
self[kSignal] = signal
|
||
|
|
self[kListener] = () => {
|
||
|
|
abort(self)
|
||
|
|
}
|
||
|
|
|
||
|
|
if ('addEventListener' in self[kSignal]) {
|
||
|
|
self[kSignal].addEventListener('abort', self[kListener])
|
||
|
|
} else {
|
||
|
|
self[kSignal].addListener('abort', self[kListener])
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function removeSignal (self) {
|
||
|
|
if (!self[kSignal]) {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
if ('removeEventListener' in self[kSignal]) {
|
||
|
|
self[kSignal].removeEventListener('abort', self[kListener])
|
||
|
|
} else {
|
||
|
|
self[kSignal].removeListener('abort', self[kListener])
|
||
|
|
}
|
||
|
|
|
||
|
|
self[kSignal] = null
|
||
|
|
self[kListener] = null
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
addSignal,
|
||
|
|
removeSignal
|
||
|
|
}
|