User:SD0001/userscript-load-caching.js

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Documentation for this user script can be added at User:SD0001/userscript-load-caching.

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// Enable caching for resource loads, see [[User:SD0001/Making_user_scripts_load_faster]], @revision 3
if (!/\bnocache=\b/.test(location.href)) { // Don't enable if nocache=1 url parameter is given
	var loadResource = function(page, sitename, ctype) {
		page = page.replace(/special:mypage/i, 'User:' + mw.config.get('wgUserName'));
		return $.get(
			'https://' + sitename + '/w/api.php?titles=' + encodeURIComponent(page) + 
			'&origin=*&format=json&formatversion=2&uselang=content&maxage=86400&smaxage=86400' + 
			'&action=query&prop=revisions|info&rvprop=content&rvlimit=1'
		).then(function(apiResponse) {
			var apiPage = apiResponse.query.pages[0];
			if (apiPage.missing) {
				return;
			}
			var content = apiPage.revisions[0].content;
	    	if ((!ctype || ctype === 'text/javascript') && apiPage.contentmodel === 'javascript') {
				var scriptTag = document.createElement('script');
				scriptTag.innerHTML = content;
				document.head.appendChild(scriptTag);
		    } else if (ctype === 'text/css' && apiPage.contentmodel === 'css') {
				mw.loader.addStyleTag(content);
			} else {
				return $.Deferred().reject('Refused to load "' + page + '"@' + sitename + ': content type mismatch');
			}
		});
	};
	var getSiteTitle = function(url) {
		var siteRgx = /^(?:(?:https:)?\/\/(.*))?\/w\/index.php/.exec(url),
			titleRgx = /\btitle=([^=?&]*)/.exec(url);
		if (siteRgx && titleRgx && /\baction=raw\b/.test(url) && /\bctype=/.test(url)) {
			return [titleRgx[1], siteRgx[1] || mw.config.get('wgServerName')];	
		} else return null;
	};
	window.importScript = function(page) {
		loadResource(page, mw.config.get('wgServerName'), 'text/javascript');
	};
	window.importStyleSheet = function(page) {
		loadResource(page, mw.config.get('wgServerName'), 'text/css');
	};
	var oldMwLoaderLoad = mw.loader.load;
	mw.loader.load = function(url, type) {
		var linkParts = getSiteTitle(url);
		if (linkParts) {
			loadResource(linkParts[0], linkParts[1], type);
		} else {
			oldMwLoaderLoad.apply(mw.loader, Array.prototype.slice.call(arguments));
		}
	};
	var oldMwLoaderGetScript = mw.loader.getScript;
	mw.loader.getScript = function(url) {
		var linkParts = getSiteTitle(url);
		if (linkParts) {
			return loadResource(linkParts[0], linkParts[1], 'text/javascript');
		} else {
			return oldMwLoaderGetScript.apply(mw.loader, Array.prototype.slice.call(arguments));
		}
	};
}