@segment/analytics-node
Version:
https://www.npmjs.com/package/@segment/analytics-node
69 lines • 2.09 kB
JavaScript
/**
* use non-native event emitter for the benefit of non-node runtimes like CF workers.
*/
import { Emitter } from '@segment/analytics-generic-utils';
import { detectRuntime } from './env';
/**
* adapted from: https://www.npmjs.com/package/node-abort-controller
*/
export class AbortSignal {
onabort = null;
aborted = false;
eventEmitter = new Emitter();
toString() {
return '[object AbortSignal]';
}
get [Symbol.toStringTag]() {
return 'AbortSignal';
}
removeEventListener(...args) {
this.eventEmitter.off(...args);
}
addEventListener(...args) {
this.eventEmitter.on(...args);
}
dispatchEvent(type) {
const event = { type, target: this };
const handlerName = `on${type}`;
if (typeof this[handlerName] === 'function') {
;
this[handlerName](event);
}
this.eventEmitter.emit(type, event);
}
}
/**
* This polyfill is only neccessary to support versions of node < 14.17.
* Can be removed once node 14 support is dropped.
*/
export class AbortController {
signal = new AbortSignal();
abort() {
if (this.signal.aborted)
return;
this.signal.aborted = true;
this.signal.dispatchEvent('abort');
}
toString() {
return '[object AbortController]';
}
get [Symbol.toStringTag]() {
return 'AbortController';
}
}
/**
* @param timeoutMs - Set a request timeout, after which the request is cancelled.
*/
export const abortSignalAfterTimeout = (timeoutMs) => {
if (detectRuntime() === 'cloudflare-worker') {
return []; // TODO: this is broken in cloudflare workers, otherwise results in "A hanging Promise was canceled..." error.
}
const ac = new (globalThis.AbortController || AbortController)();
const timeoutId = setTimeout(() => {
ac.abort();
}, timeoutMs);
// Allow Node.js processes to exit early if only the timeout is running
timeoutId?.unref?.();
return [ac.signal, timeoutId];
};
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