1 files changed, 216 insertions, 0 deletions
diff --git a/node_modules/normalize-url/index.js b/node_modules/normalize-url/index.js
new file mode 100644
index 0000000..c9340ab
--- /dev/null
+++ b/node_modules/normalize-url/index.js
@@ -0,0 +1,216 @@
+'use strict';
+
+// 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 match = /^data:(?<type>[^,]*?),(?<data>[^#]*?)(?:#(?<hash>.*))?$/.exec(urlString);
+
+	if (!match) {
+		throw new Error(`Invalid URL: ${urlString}`);
+	}
+
+	let {type, data, hash} = match.groups;
+	const mediaType = type.split(';');
+	hash = stripHash ? '' : hash;
+
+	let isBase64 = false;
+	if (mediaType[mediaType.length - 1] === 'base64') {
+		mediaType.pop();
+		isBase64 = true;
+	}
+
+	// Lowercase MIME type
+	const mimeType = (mediaType.shift() || '').toLowerCase();
+	const attributes = mediaType
+		.map(attribute => {
+			let [key, value = ''] = attribute.split('=').map(string => string.trim());
+
+			// Lowercase `charset`
+			if (key === 'charset') {
+				value = value.toLowerCase();
+
+				if (value === DATA_URL_DEFAULT_CHARSET) {
+					return '';
+				}
+			}
+
+			return `${key}${value ? `=${value}` : ''}`;
+		})
+		.filter(Boolean);
+
+	const normalizedMediaType = [
+		...attributes
+	];
+
+	if (isBase64) {
+		normalizedMediaType.push('base64');
+	}
+
+	if (normalizedMediaType.length !== 0 || (mimeType && mimeType !== DATA_URL_DEFAULT_MIME_TYPE)) {
+		normalizedMediaType.unshift(mimeType);
+	}
+
+	return `data:${normalizedMediaType.join(';')},${isBase64 ? data.trim() : data}${hash ? `#${hash}` : ''}`;
+};
+
+const normalizeUrl = (urlString, options) => {
+	options = {
+		defaultProtocol: 'http:',
+		normalizeProtocol: true,
+		forceHttp: false,
+		forceHttps: false,
+		stripAuthentication: true,
+		stripHash: false,
+		stripTextFragment: true,
+		stripWWW: true,
+		removeQueryParameters: [/^utm_\w+/i],
+		removeTrailingSlash: true,
+		removeSingleSlash: true,
+		removeDirectoryIndex: false,
+		sortQueryParameters: true,
+		...options
+	};
+
+	urlString = urlString.trim();
+
+	// Data URL
+	if (/^data:/i.test(urlString)) {
+		return normalizeDataURL(urlString, options);
+	}
+
+	if (/^view-source:/i.test(urlString)) {
+		throw new Error('`view-source:` is not supported as it is a non-standard protocol');
+	}
+
+	const hasRelativeProtocol = urlString.startsWith('//');
+	const isRelativeUrl = !hasRelativeProtocol && /^\.*\//.test(urlString);
+
+	// Prepend protocol
+	if (!isRelativeUrl) {
+		urlString = urlString.replace(/^(?!(?:\w+:)?\/\/)|^\/\//, options.defaultProtocol);
+	}
+
+	const urlObj = new URL(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 = '';
+	} else if (options.stripTextFragment) {
+		urlObj.hash = urlObj.hash.replace(/#?:~:text.*?$/i, '');
+	}
+
+	// Remove duplicate slashes if not preceded by a protocol
+	if (urlObj.pathname) {
+		urlObj.pathname = urlObj.pathname.replace(/(?<!\b(?:[a-z][a-z\d+\-.]{1,50}:))\/{2,}/g, '/');
+	}
+
+	// Decode URI octets
+	if (urlObj.pathname) {
+		try {
+			urlObj.pathname = decodeURI(urlObj.pathname);
+		} catch (_) {}
+	}
+
+	// Remove directory index
+	if (options.removeDirectoryIndex === true) {
+		options.removeDirectoryIndex = [/^index\.[a-z]+$/];
+	}
+
+	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(/\.$/, '');
+
+		// Remove `www.`
+		if (options.stripWWW && /^www\.(?!www\.)(?:[a-z\-\d]{1,63})\.(?:[a-z.\-\d]{2,63})$/.test(urlObj.hostname)) {
+			// Each label should be max 63 at length (min: 1).
+			// Source: https://en.wikipedia.org/wiki/Hostname#Restrictions_on_valid_host_names
+			// Each TLD should be up to 63 characters long (min: 2).
+			// It is technically possible to have a single character TLD, but none currently exist.
+			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);
+			}
+		}
+	}
+
+	if (options.removeQueryParameters === true) {
+		urlObj.search = '';
+	}
+
+	// Sort query parameters
+	if (options.sortQueryParameters) {
+		urlObj.searchParams.sort();
+	}
+
+	if (options.removeTrailingSlash) {
+		urlObj.pathname = urlObj.pathname.replace(/\/$/, '');
+	}
+
+	const oldUrlString = urlString;
+
+	// Take advantage of many of the Node `url` normalizations
+	urlString = urlObj.toString();
+
+	if (!options.removeSingleSlash && urlObj.pathname === '/' && !oldUrlString.endsWith('/') && urlObj.hash === '') {
+		urlString = urlString.replace(/\/$/, '');
+	}
+
+	// Remove ending `/` unless removeSingleSlash is false
+	if ((options.removeTrailingSlash || urlObj.pathname === '/') && urlObj.hash === '' && options.removeSingleSlash) {
+		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;