71 lines
2.1 KiB
JavaScript
71 lines
2.1 KiB
JavaScript
// ==UserScript==
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// @name Abort Network Requests on Escape
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// @namespace blankie-scripts
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// @match http*://*/*
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// @grant none
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// @version 1.0.0
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// @author blankie
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// @description Aborts network requests invoked from XMLHttpRequest and fetch() when Escape is pressed
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// @run-at document-start
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// @inject-into page
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// ==/UserScript==
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"use strict";
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let activeXHRs = new Set();
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let abortControllers = new Set();
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unsafeWindow.XMLHttpRequest = new Proxy(unsafeWindow.XMLHttpRequest, {
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construct: function(target, args) {
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let xhr = new target(...args);
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xhr.addEventListener("loadstart", function() {
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activeXHRs.add(this);
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}, {passive: true});
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xhr.addEventListener("loadend", function() {
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activeXHRs.delete(this);
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}, {passive: true});
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return xhr;
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}
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});
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let originalFetch = unsafeWindow.fetch;
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unsafeWindow.fetch = function(resource, options = undefined) {
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let abortController = new AbortController();
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options = options || {};
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let originalSignal = options.signal;
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if (originalSignal) {
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originalSignal.addEventListener("abort", function() {
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abortController.abort(originalSignal.reason);
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}, {passive: true});
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}
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options.signal = abortController.signal;
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abortControllers.add(abortController);
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return originalFetch.call(this, resource, options).finally(function() {
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abortControllers.delete(abortController);
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});
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}
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function abortAllRequests() {
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for (let activeXHR of activeXHRs) {
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activeXHR.abort();
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}
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activeXHRs.clear();
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let error = new DOMException("Network request cancelled by Abort Network Requests on Escape", "NetworkError");
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for (let abortController of abortControllers) {
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abortController.abort(error);
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}
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abortControllers.clear();
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}
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window.addEventListener("keydown", function(event) {
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if (event.key !== "Escape" || event.target !== document.body || event.altKey || event.ctrlKey || event.metaKey || event.shiftKey) {
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return;
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}
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abortAllRequests();
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}, {passive: true}); |