remove google tracking UWAA

remove google tracking
目前为 2017-07-13 提交的版本。查看最新版本。
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// ==UserScript==
// @namespace      jp.sceneq.rgtuwaaa

// @name           remove google tracking UWAA

// @description    remove google tracking
// @description:ja Google追跡UWAAを取り除きなさい

// @homepageURL    https://github.com/sceneq/RemoveGoogleTracking

// @version        0.6
// @include        https://www.google.*/*
// @grant          none
// @run-at         document-start

// @author         sceneq
// @license        MIT
// ==/UserScript==

'use strict';

const yesman = function() {
	return true;
};
const tired = function() {};

// matching tracking paramaters
const badParametersNames = [
	'biw',
	'bih',
	'ei',
	'sa',
	'ved',
	'source',
	'prmd',
	'bvm',
	'bav',
	'psi',
	'stick',
	'dq',
	'ech',

	// image search
	'scroll',
	'vet',
	'yv',
	'ijn',
	'iact',
	'forward',
	'ndsp',
	'csi',
	'tbnid',
	'docid',
	//'imgdii',  // related images

	// search form
	'pbx',
	'dpr',
	'pf',
	'gs_rn',
	'gs_mss',
	'pq',
	'cp',
	'oq',
	'sclient',
	'gs_l',
	'aqs',
	//'gs_ri',   // suggestions
	//'gs_id',   // suggestions
	//'xhr',     // suggestions at image search
	//'tch',     // js flag?

	// mobile
	'gs_gbg',
	'gs_rn',
	'cp'
];
const badAttrNamesObj = {
	default: ['onmousedown', 'ping', 'oncontextmenu'],
	search: ['onmousedown', 'ping', 'oncontextmenu'],
	vid: ['onmousedown'],
	isch: []
};

// From the nodes selected here, delete parameters specified by badParametersNames
const dirtyLinkSelectors = [
	// menu
	'a.q.qs',

	// doodle
	'a.doodle'
];

const badPaths = ['imgevent'];

/* Compile */
// The first paramater is probably 'q' so '?' does not consider
const regBadParameters = new RegExp(
	'&(?:' + badParametersNames.join('|') + ')=.*?(?=(&|$))',
	'g'
);
const regBadPaths = new RegExp('^/(?:' + badPaths.join('|') + ')');
const dirtyLinkSelector = dirtyLinkSelectors
	.map(s => s + ":not([href=''])")
	.join(',');

/*
 * Functions
 */
/* Return parameter value */
function extractDirectLink(str, param) {
	//(?<=q=)(.*)(?=&)/
	const res = new RegExp(`[?&]${param}(=([^&#]*))`).exec(str);
	if (!res || !res[2]) return '';
	return decodeURIComponent(res[2]);
}

/* Return the current Google search mode */
function getParam(parameter, name) {
	var results = new RegExp('[?&]' + name + '=([^&#]*)').exec(parameter);
	if (results === null) {
		return null;
	} else {
		return results.pop() || 0;
	}
}

/* return search mode */
function getMode() {
	const parameter = location.search + location.hash;
	return getParam(parameter, 'tbm') || 'search';
}

function sleep(ms) {
	return new Promise(resolve => setTimeout(resolve, ms));
}

/* Return Promise when declared the variable name specified by argument */
async function onDeclare(obj, propertyStr, interval = 80) {
	return new Promise(async function(resolve, reject) {
		const propertyNames = propertyStr.split('.');
		let currObj = obj;
		for (const propertyName of propertyNames) {
			while (!(propertyName in currObj) || currObj[propertyName] === null) {
				await sleep(interval);
			}
			currObj = currObj[propertyName];
		}
		resolve(currObj);
	});
}

function removeDOM(node) {
	node.parentNode.removeChild(node);
}

function rewriteProperties(prop) {
	prop.forEach(table => {
		//const targetObject = typeof table[0] === 'function' ? table[0]() : table[0];
		Object.defineProperty(table[0] || {}, table[1], {
			value: table[2],
			writable: false
		});
	});
}

function load() {
	console.time('LOAD');

	/* Overwrite disturbing  functions */
	rewriteProperties([[window, 'rwt', yesman], [window.gbar_, 'Rm', yesman]]);

	/*
	 * Variables
	 */
	// Whether to use AJAX
	const legacy = document.getElementById('cst') === null;

	/* Nodes */
	const nodeMain = document.getElementById("main");
	const nodeCnt = document.getElementById("cnt");
	const root = (() => {
		if (legacy) {
			return nodeCnt || nodeMain || window.document;
		} else {
			return nodeMain; // || nodeCnt;
		}
	})();

	// Flag indicating whether the hard tab is loaded on 'DOMContentLoaded'
	const lazy_hdtb = !legacy || root === nodeCnt;

	// Define selector function
	const $ = root.querySelector.bind(root);
	const $$ = sel =>
		Array.prototype.slice.call(root.querySelectorAll.call(root, [sel]));

	// Selector pointing to anchors to purify
	const dirtySelector = (() => {
		if (root === window.document) {
			return 'body a';
		} else if (legacy) {
			return `#${root.id} a`;
		} else {
			return '#rcnt a';
		}
	})();

	/*
	 * Functions
	 */
	function removeTracking() {
		console.time('removeTracking');
		const mode = getMode();
		const badAttrNames = badAttrNamesObj[mode]
			? badAttrNamesObj[mode]
			: badAttrNamesObj['default'];
		const directLinkParamName = 'q';

		// search result
		for (const searchResult of $$(dirtySelector)) {
			// remove attributes
			badAttrNames.map(s => {
				searchResult.removeAttribute(s);
			});

			// hide referrer
			searchResult.rel = 'noreferrer';

			// remove google redirect link(legacy)
			if (
				searchResult.hasAttribute('href') &&
				searchResult.getAttribute('href').startsWith('/url?')
			) {
				searchResult.href = extractDirectLink(
					searchResult.href,
					directLinkParamName
				);
			}
			searchResult.href = searchResult.href.replace(regBadParameters, '');
		}
		for (const dirtyLink of document.querySelectorAll(dirtyLinkSelector)) {
			dirtyLink.href = dirtyLink.href.replace(regBadParameters, '');
		}

		switch (mode) {
			case 'shop':
				// Overwrite links(desktop version only)
				//Object.values(google.pmc.smpo.r).map(s=>{return {title:s[14][0],link:s[28][8]}})
				if (legacy) break;
				onDeclare(google, 'pmc.spop.r').then(shopObj => {
					const shopElements = $$('.pstl');
					const shopLinks = Object.values(shopObj).map(a => a[34][6]);

					if (shopElements.length !== shopLinks.length) {
						console.warn(
							'length does not match',
							shopElements.length,
							shopLinks.length
						);
						return;
					}

					const zip = rows => rows[0].map((_, c) => rows.map(row => row[c]));
					for (const detail of zip([shopElements, shopLinks])) {
						detail[0].href = detail[1];
					}
					console.log('Links Rewrited');
				});
				break;
			default:
				break;
		}
		console.timeEnd('removeTracking');
	}

	const ObserveOp = {
		LOADED: {
			FORM: Symbol(),
			IMAGE: Symbol(),
			HDTB: Symbol()
		},
		UPDATE: {
			HDTB: Symbol()
		},
		CHANGE: {
			HDTB: Symbol(),
			PAGE: Symbol()
		}
	};
	const ObserveDisconnectListAfTriggered = Object.values(ObserveOp.LOADED);

	function startObserve(targetElement, op, func, conf = { childList: true }) {
		//console.log("Operation", op , "Register To", targetElement)
		new MutationObserver((mutations, observer) => {
			let nodes = Array.prototype.concat
				.apply([], mutations.map(s => Array.prototype.slice.call(s.addedNodes)))
				.filter(n => n.nodeName !== '#comment');

			//console.log("Nodes Captured By", op, nodes);

			switch (op) {
				case ObserveOp.LOADED.FORM:
					nodes = nodes.filter(n => n.name === 'gs_l');
					break;
				case ObserveOp.LOADED.IMAGE:
					nodes = nodes.filter(n => n.classList.contains('irc_bg'));
					break;
				case ObserveOp.LOADED.HDTB:
					nodes = nodes.filter(n => n.className === 'hdtb-mn-cont');
					break;
				case ObserveOp.UPDATE.HDTB:
					nodes = nodes.filter(n => n.className === 'hdtb-mn-cont');
					break;
				case ObserveOp.CHANGE.HDTB:
					nodes = nodes.filter(n => n.id === 'cnt');
					break;
				case ObserveOp.CHANGE.PAGE:
					nodes = nodes.filter(n => n.dataset && n.dataset.ved !== undefined);
					break;
				default:
					break;
			}

			if (nodes.length >= 1) {
				//console.log("Operation", op , "Fired", nodes[0])
				func();
				if (ObserveDisconnectListAfTriggered.includes(op)) {
					observer.disconnect();
				}
			}
		}).observe(targetElement, conf);
	}

	function pageInit() {
		removeTracking();
		startObserve($('#search'), ObserveOp.CHANGE.PAGE, removeTracking);
	}

	const initMode = getMode();
	const confDeepObserve = { childList: true, subtree: true };

	// Wait for .hdtb-mn-cont appears in the first page access
	if (lazy_hdtb && !legacy) {
		startObserve(
			root,
			ObserveOp.LOADED.HDTB,
			() => {
				switch (initMode) {
					case 'isch': // Image Search
						removeTracking();
						startObserve($('#isr_mc'), ObserveOp.LOADED.IMAGE, () => {
							$$(
								".irc_tas, .irc_mil, .irc_hol, .irc_but[jsaction*='mousedown']"
							).forEach(e => {
								e.__jsaction = null;
								e.removeAttribute('jsaction');
							});
						});
						startObserve(
							$('#top_nav'),
							ObserveOp.UPDATE.HDTB,
							removeTracking,
							confDeepObserve
						);
						break;
					default:
						pageInit();
						// Wait for #cnt inserted. In HDTB switching, since .hdtb-mn-cont does not appear
						startObserve(root, ObserveOp.CHANGE.HDTB, pageInit);
						break;
				}
			},
			confDeepObserve
		);
	}

	if (legacy) {
		removeTracking();

		// Remove unnecessary input
		startObserve(document.querySelector('form'), ObserveOp.LOADED.FORM, () => {
			document
				.querySelectorAll("form input:not([name='q']):not([name='hl'])")
				.forEach(s => removeDOM(s));
		});

		// Remove unnecessary parameters from 'option'
		for(const option of document.querySelectorAll("#mor > option")){
			option.value = option.value.replace(regBadParameters, '');
		}

		console.warn('legacy mode');
		console.timeEnd('LOAD');
		return;
	}

	console.timeEnd('LOAD');
}

function init() {
	console.time('init');
	onDeclare(window, 'google', 20).then(() => {
		rewriteProperties([
			[google, 'log', yesman],
			[google, 'rll', yesman],
			[google, 'logUrl', tired],
			[google, 'getEI', yesman],
			[google, 'getLEI', yesman],
			[google, 'ctpacw', yesman],
			[google, 'csiReport', yesman],
			[google, 'report', yesman],
			[google, 'aft', yesman],
			[google, 'kEI', '0']
		]);
	});

	// Reject Request by img tag
	const regBadImageSrc = /\/(?:gen(?:erate)?|client)_204/;
	Object.defineProperty(window.Image.prototype, 'src', {
		set: function(url) {
			if (!regBadImageSrc.test(url)) {
				this.setAttribute('src', url);
			}
		}
	});

	// Reject unknown parameters by script tag
	Object.defineProperty(window.HTMLScriptElement.prototype, 'src', {
		set: function(url) {
			this.setAttribute('src', url.replace(regBadParameters, ''));
		}
	});

	// hook XHR
	const origOpen = XMLHttpRequest.prototype.open;
	window.XMLHttpRequest.prototype.open = function(act, path) {
		if (regBadPaths.test(path)) {
			return;
		}
		origOpen.apply(this, [act, path.replace(regBadParameters, '')]);
	};

	// do not send referrer
	const noreferrerMeta = document.createElement('meta');
	noreferrerMeta.setAttribute('name', 'referrer');
	noreferrerMeta.setAttribute('content', 'no-referrer');
	document.querySelector('head').appendChild(noreferrerMeta);

	console.timeEnd('init');
}

/* Execute */

init();
window.addEventListener('DOMContentLoaded', load);

// for older browser
if (document.getElementById('universal') !== null) {
	load();
}
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