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GM web hooks

Makes GM_xmlhttpRequest and GM_download queued

Tính đến 20-02-2023. Xem phiên bản mới nhất.

Script này sẽ không được không được cài đặt trực tiếp. Nó là một thư viện cho các script khác để bao gồm các chỉ thị meta // @require https://update.greasyfork.org/scripts/460385/1152018/GM%20web%20hooks.js 

/* eslint-disable no-multi-spaces */

// ==UserScript==
// @name               GM web hooks
// @namespace          GM-web-hooks
// @version            0.1
// @description        Makes GM_xmlhttpRequest and GM_download queued
// @author             PY-DNG
// @license            GPL-v3
// ==/UserScript==

/* global LogLevel DoLog Err $ $All $CrE $AEL addStyle destroyEvent copyProp copyProps parseArgs escJsStr replaceText getUrlArgv dl_browser dl_GM AsyncManager */

(function __MAIN__() {
    'use strict';

	// GM_XHR HOOK: The number of running GM_XHRs in a time must under maxXHR
	// Returns the abort function to stop the request anyway(no matter it's still waiting, or requesting)
	// (If the request is invalid, such as url === '', will return false and will NOT make this request)
	// If the abort function called on a request that is not running(still waiting or finished), there will be NO onabort event
	// Requires: function delItem(){...} & function uniqueIDMaker(){...}
	function GMXHRHook(maxXHR=5) {
		const GM_XHR = GM_xmlhttpRequest;
		const getID = function() {
			let id = 0;
			return () => id++;
		}();
		let todoList = [], ongoingList = [];
		GM_xmlhttpRequest = safeGMxhr;

		function safeGMxhr() {
			// Get an id for this request, arrange a request object for it.
			const id = getID();
			const request = {id: id, args: arguments, aborter: null};

			// Deal onload function first
			dealEndingEvents(request);

			/* DO NOT DO THIS! KEEP ITS ORIGINAL PROPERTIES!
			// Stop invalid requests
			if (!validCheck(request)) {
				return false;
			}
			*/

			// Judge if we could start the request now or later?
			todoList.push(request);
			checkXHR();
			return makeAbortFunc(id);

			// Decrease activeXHRCount while GM_XHR onload;
			function dealEndingEvents(request) {
				const e = request.args[0];

				// onload event
				const oriOnload = e.onload;
				e.onload = function() {
					reqFinish(request.id);
					checkXHR();
					oriOnload ? oriOnload.apply(null, arguments) : function() {};
				}

				// onerror event
				const oriOnerror = e.onerror;
				e.onerror = function() {
					reqFinish(request.id);
					checkXHR();
					oriOnerror ? oriOnerror.apply(null, arguments) : function() {};
				}

				// ontimeout event
				const oriOntimeout = e.ontimeout;
				e.ontimeout = function() {
					reqFinish(request.id);
					checkXHR();
					oriOntimeout ? oriOntimeout.apply(null, arguments) : function() {};
				}

				// onabort event
				const oriOnabort = e.onabort;
				e.onabort = function() {
					reqFinish(request.id);
					checkXHR();
					oriOnabort ? oriOnabort.apply(null, arguments) : function() {};
				}
			}

			// Check if the request is invalid
			function validCheck(request) {
				const e = request.args[0];

				if (!e.url) {
					return false;
				}

				return true;
			}

			// Call a XHR from todoList and push the request object to ongoingList if called
			function checkXHR() {
				if (ongoingList.length >= maxXHR) {return false;};
				if (todoList.length === 0) {return false;};
				const req = todoList.shift();
				const reqArgs = req.args;
				const aborter = GM_XHR.apply(null, reqArgs);
				req.aborter = aborter;
				ongoingList.push(req);
				return req;
			}

			// Make a function that aborts a certain request
			function makeAbortFunc(id) {
				return function() {
					let i;

					// Check if the request haven't been called
					for (i = 0; i < todoList.length; i++) {
						const req = todoList[i];
						if (req.id === id) {
							// found this request: haven't been called
							todoList.splice(i, 1);
							return true;
						}
					}

					// Check if the request is running now
					for (i = 0; i < ongoingList.length; i++) {
						const req = todoList[i];
						if (req.id === id) {
							// found this request: running now
							req.aborter();
							reqFinish(id);
							checkXHR();
						}
					}

					// Oh no, this request is already finished...
					return false;
				}
			}

			// Remove a certain request from ongoingList
			function reqFinish(id) {
				let i;
				for (i = 0; i < ongoingList.length; i++) {
					const req = ongoingList[i];
					if (req.id === id) {
						ongoingList = ongoingList.splice(i, 1);
						return true;
					}
				}
				return false;
			}
		}
	}

	// GM_DL HOOK: The number of running GM_download in a time must under maxDL
	// Returns the abort function to stop the request anyway(no matter it's still waiting, or requesting)
	// (If the request is invalid, such as url === '', will return false and will NOT make this request)
	// If the abort function called on a request that is not running(still waiting or finished), there will be NO onabort event
	// Requires: function delItem(){...} & function uniqueIDMaker(){...}
	function GMDLHOOK(maxDL=5) {
		const GM_DL = GM_download;
		const getID = function() {
			let id = 0;
			return () => id++;
		}();
		let todoList = [], ongoingList = [];
		GM_download = safeGMdl;

		function safeGMdl() {
			// Get an id for this request, arrange a request object for it.
			const id = getID();
			const request = {id: id, args: arguments, aborter: null};

			// Deal onload function first
			dealEndingEvents(request);

			/* DO NOT DO THIS! KEEP ITS ORIGINAL PROPERTIES!
			// Stop invalid requests
			if (!validCheck(request)) {
				return false;
			}
			*/

			// Judge if we could start the request now or later?
			todoList.push(request);
			checkDL();
			return makeAbortFunc(id);

			// Decrease activeXHRCount while GM_DL onload;
			function dealEndingEvents(request) {
				const e = request.args[0];

				// onload event
				const oriOnload = e.onload;
				e.onload = function() {
					reqFinish(request.id);
					checkDL();
					oriOnload ? oriOnload.apply(null, arguments) : function() {};
				}

				// onerror event
				const oriOnerror = e.onerror;
				e.onerror = function() {
					reqFinish(request.id);
					checkDL();
					oriOnerror ? oriOnerror.apply(null, arguments) : function() {};
				}

				// ontimeout event
				const oriOntimeout = e.ontimeout;
				e.ontimeout = function() {
					reqFinish(request.id);
					checkDL();
					oriOntimeout ? oriOntimeout.apply(null, arguments) : function() {};
				}

				// onabort event
				const oriOnabort = e.onabort;
				e.onabort = function() {
					reqFinish(request.id);
					checkDL();
					oriOnabort ? oriOnabort.apply(null, arguments) : function() {};
				}
			}

			// Check if the request is invalid
			function validCheck(request) {
				const e = request.args[0];

				if (!e.url) {
					return false;
				}

				return true;
			}

			// Call a XHR from todoList and push the request object to ongoingList if called
			function checkDL() {
				if (ongoingList.length >= maxDL) {return false;};
				if (todoList.length === 0) {return false;};
				const req = todoList.shift();
				const reqArgs = req.args;
				const aborter = GM_DL.apply(null, reqArgs);
				req.aborter = aborter;
				ongoingList.push(req);
				return req;
			}

			// Make a function that aborts a certain request
			function makeAbortFunc(id) {
				return function() {
					let i;

					// Check if the request haven't been called
					for (i = 0; i < todoList.length; i++) {
						const req = todoList[i];
						if (req.id === id) {
							// found this request: haven't been called
							todoList.splice(i, 1);
							return true;
						}
					}

					// Check if the request is running now
					for (i = 0; i < ongoingList.length; i++) {
						const req = todoList[i];
						if (req.id === id) {
							// found this request: running now
							req.aborter();
							reqFinish(id);
							checkDL();
						}
					}

					// Oh no, this request is already finished...
					return false;
				}
			}

			// Remove a certain request from ongoingList
			function reqFinish(id) {
				let i;
				for (i = 0; i < ongoingList.length; i++) {
					const req = ongoingList[i];
					if (req.id === id) {
						ongoingList = ongoingList.splice(i, 1);
						return true;
					}
				}
				return false;
			}
		}
	}
})();