1 files changed, 221 insertions, 0 deletions
diff --git a/utilities/node_modules/normalize-url/index.js b/utilities/node_modules/normalize-url/index.js
new file mode 100644
index 0000000..2ab7f57
--- /dev/null
+++ b/utilities/node_modules/normalize-url/index.js
@@ -0,0 +1,221 @@
+'use strict';
+// TODO: Use the `URL` global when targeting Node.js 10
+const URLParser = typeof URL === 'undefined' ? require('url').URL : URL;
+
+// https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs
+const DATA_URL_DEFAULT_MIME_TYPE = 'text/plain';
+const DATA_URL_DEFAULT_CHARSET = 'us-ascii';
+
+const testParameter = (name, filters) => {
+	return filters.some(filter => filter instanceof RegExp ? filter.test(name) : filter === name);
+};
+
+const normalizeDataURL = (urlString, {stripHash}) => {
+	const parts = urlString.match(/^data:([^,]*?),([^#]*?)(?:#(.*))?$/);
+
+	if (!parts) {
+		throw new Error(`Invalid URL: ${urlString}`);
+	}
+
+	const mediaType = parts[1].split(';');
+	const body = parts[2];
+	const hash = stripHash ? '' : parts[3];
+
+	let base64 = false;
+
+	if (mediaType[mediaType.length - 1] === 'base64') {
+		mediaType.pop();
+		base64 = true;
+	}
+
+	// Lowercase MIME type
+	const mimeType = (mediaType.shift() || '').toLowerCase();
+	const attributes = mediaType
+		.map(attribute => {
+			let [key, value = ''] = attribute.split('=').map(string => string.trim());
+
+			// Lowercase `charset`
+			if (key === 'charset') {
+				value = value.toLowerCase();
+
+				if (value === DATA_URL_DEFAULT_CHARSET) {
+					return '';
+				}
+			}
+
+			return `${key}${value ? `=${value}` : ''}`;
+		})
+		.filter(Boolean);
+
+	const normalizedMediaType = [
+		...attributes
+	];
+
+	if (base64) {
+		normalizedMediaType.push('base64');
+	}
+
+	if (normalizedMediaType.length !== 0 || (mimeType && mimeType !== DATA_URL_DEFAULT_MIME_TYPE)) {
+		normalizedMediaType.unshift(mimeType);
+	}
+
+	return `data:${normalizedMediaType.join(';')},${base64 ? body.trim() : body}${hash ? `#${hash}` : ''}`;
+};
+
+const normalizeUrl = (urlString, options) => {
+	options = {
+		defaultProtocol: 'http:',
+		normalizeProtocol: true,
+		forceHttp: false,
+		forceHttps: false,
+		stripAuthentication: true,
+		stripHash: false,
+		stripWWW: true,
+		removeQueryParameters: [/^utm_\w+/i],
+		removeTrailingSlash: true,
+		removeDirectoryIndex: false,
+		sortQueryParameters: true,
+		...options
+	};
+
+	// TODO: Remove this at some point in the future
+	if (Reflect.has(options, 'normalizeHttps')) {
+		throw new Error('options.normalizeHttps is renamed to options.forceHttp');
+	}
+
+	if (Reflect.has(options, 'normalizeHttp')) {
+		throw new Error('options.normalizeHttp is renamed to options.forceHttps');
+	}
+
+	if (Reflect.has(options, 'stripFragment')) {
+		throw new Error('options.stripFragment is renamed to options.stripHash');
+	}
+
+	urlString = urlString.trim();
+
+	// Data URL
+	if (/^data:/i.test(urlString)) {
+		return normalizeDataURL(urlString, options);
+	}
+
+	const hasRelativeProtocol = urlString.startsWith('//');
+	const isRelativeUrl = !hasRelativeProtocol && /^\.*\//.test(urlString);
+
+	// Prepend protocol
+	if (!isRelativeUrl) {
+		urlString = urlString.replace(/^(?!(?:\w+:)?\/\/)|^\/\//, options.defaultProtocol);
+	}
+
+	const urlObj = new URLParser(urlString);
+
+	if (options.forceHttp && options.forceHttps) {
+		throw new Error('The `forceHttp` and `forceHttps` options cannot be used together');
+	}
+
+	if (options.forceHttp && urlObj.protocol === 'https:') {
+		urlObj.protocol = 'http:';
+	}
+
+	if (options.forceHttps && urlObj.protocol === 'http:') {
+		urlObj.protocol = 'https:';
+	}
+
+	// Remove auth
+	if (options.stripAuthentication) {
+		urlObj.username = '';
+		urlObj.password = '';
+	}
+
+	// Remove hash
+	if (options.stripHash) {
+		urlObj.hash = '';
+	}
+
+	// Remove duplicate slashes if not preceded by a protocol
+	if (urlObj.pathname) {
+		// TODO: Use the following instead when targeting Node.js 10
+		// `urlObj.pathname = urlObj.pathname.replace(/(?<!https?:)\/{2,}/g, '/');`
+		urlObj.pathname = urlObj.pathname.replace(/((?!:).|^)\/{2,}/g, (_, p1) => {
+			if (/^(?!\/)/g.test(p1)) {
+				return `${p1}/`;
+			}
+
+			return '/';
+		});
+	}
+
+	// Decode URI octets
+	if (urlObj.pathname) {
+		urlObj.pathname = decodeURI(urlObj.pathname);
+	}
+
+	// Remove directory index
+	if (options.removeDirectoryIndex === true) {
+		options.removeDirectoryIndex = [/^index\.[a-z]+$/];
+	}
+
+	if (Array.isArray(options.removeDirectoryIndex) && options.removeDirectoryIndex.length > 0) {
+		let pathComponents = urlObj.pathname.split('/');
+		const lastComponent = pathComponents[pathComponents.length - 1];
+
+		if (testParameter(lastComponent, options.removeDirectoryIndex)) {
+			pathComponents = pathComponents.slice(0, pathComponents.length - 1);
+			urlObj.pathname = pathComponents.slice(1).join('/') + '/';
+		}
+	}
+
+	if (urlObj.hostname) {
+		// Remove trailing dot
+		urlObj.hostname = urlObj.hostname.replace(/\.$/, '');
+
+		// Remove `www.`
+		if (options.stripWWW && /^www\.([a-z\-\d]{2,63})\.([a-z.]{2,5})$/.test(urlObj.hostname)) {
+			// Each label should be max 63 at length (min: 2).
+			// The extension should be max 5 at length (min: 2).
+			// Source: https://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_host_names
+			urlObj.hostname = urlObj.hostname.replace(/^www\./, '');
+		}
+	}
+
+	// Remove query unwanted parameters
+	if (Array.isArray(options.removeQueryParameters)) {
+		for (const key of [...urlObj.searchParams.keys()]) {
+			if (testParameter(key, options.removeQueryParameters)) {
+				urlObj.searchParams.delete(key);
+			}
+		}
+	}
+
+	// Sort query parameters
+	if (options.sortQueryParameters) {
+		urlObj.searchParams.sort();
+	}
+
+	if (options.removeTrailingSlash) {
+		urlObj.pathname = urlObj.pathname.replace(/\/$/, '');
+	}
+
+	// Take advantage of many of the Node `url` normalizations
+	urlString = urlObj.toString();
+
+	// Remove ending `/`
+	if ((options.removeTrailingSlash || urlObj.pathname === '/') && urlObj.hash === '') {
+		urlString = urlString.replace(/\/$/, '');
+	}
+
+	// Restore relative protocol, if applicable
+	if (hasRelativeProtocol && !options.normalizeProtocol) {
+		urlString = urlString.replace(/^http:\/\//, '//');
+	}
+
+	// Remove http/https
+	if (options.stripProtocol) {
+		urlString = urlString.replace(/^(?:https?:)?\/\//, '');
+	}
+
+	return urlString;
+};
+
+module.exports = normalizeUrl;
+// TODO: Remove this for the next major release
+module.exports.default = normalizeUrl;