87 lines
2.7 KiB
JavaScript
Executable File
87 lines
2.7 KiB
JavaScript
Executable File
/** Monitor when the consumer finishes reading the response body.
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that's as close as we can get to `res.on('close')` using web APIs.
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*/ "use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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0 && (module.exports = {
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CloseController: null,
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trackBodyConsumed: null,
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trackStreamConsumed: null
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});
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function _export(target, all) {
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for(var name in all)Object.defineProperty(target, name, {
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enumerable: true,
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get: all[name]
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});
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}
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_export(exports, {
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CloseController: function() {
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return CloseController;
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},
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trackBodyConsumed: function() {
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return trackBodyConsumed;
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},
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trackStreamConsumed: function() {
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return trackStreamConsumed;
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}
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});
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function trackBodyConsumed(body, onEnd) {
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if (typeof body === 'string') {
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const generator = async function* generate() {
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const encoder = new TextEncoder();
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yield encoder.encode(body);
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onEnd();
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};
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// @ts-expect-error BodyInit typings doesn't seem to include AsyncIterables even though it's supported in practice
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return generator();
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} else {
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return trackStreamConsumed(body, onEnd);
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}
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}
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function trackStreamConsumed(stream, onEnd) {
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// NOTE: This function must handle `stream` being aborted or cancelled,
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// so it can't just be this:
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//
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// return stream.pipeThrough(new TransformStream({ flush() { onEnd() } }))
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//
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// because that doesn't handle cancellations.
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// (and cancellation handling via `Transformer.cancel` is only available in node >20)
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const dest = new TransformStream();
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const runOnEnd = ()=>onEnd();
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stream.pipeTo(dest.writable).then(runOnEnd, runOnEnd);
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return dest.readable;
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}
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class CloseController {
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onClose(callback) {
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if (this.isClosed) {
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throw Object.defineProperty(new Error('Cannot subscribe to a closed CloseController'), "__NEXT_ERROR_CODE", {
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value: "E365",
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enumerable: false,
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configurable: true
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});
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}
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this.target.addEventListener('close', callback);
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this.listeners++;
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}
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dispatchClose() {
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if (this.isClosed) {
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throw Object.defineProperty(new Error('Cannot close a CloseController multiple times'), "__NEXT_ERROR_CODE", {
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value: "E229",
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enumerable: false,
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configurable: true
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});
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}
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if (this.listeners > 0) {
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this.target.dispatchEvent(new Event('close'));
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}
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this.isClosed = true;
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}
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constructor(){
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this.target = new EventTarget();
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this.listeners = 0;
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this.isClosed = false;
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}
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}
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//# sourceMappingURL=web-on-close.js.map
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