ghaction-upx/node_modules/normalize-url/index.js
2020-01-17 09:39:25 +01:00

164 lines
3.9 KiB
JavaScript

'use strict';
const url = require('url');
const punycode = require('punycode');
const queryString = require('query-string');
const prependHttp = require('prepend-http');
const sortKeys = require('sort-keys');
const DEFAULT_PORTS = {
'http:': 80,
'https:': 443,
'ftp:': 21
};
// Protocols that always contain a `//`` bit
const slashedProtocol = {
http: true,
https: true,
ftp: true,
gopher: true,
file: true,
'http:': true,
'https:': true,
'ftp:': true,
'gopher:': true,
'file:': true
};
function testParameter(name, filters) {
return filters.some(filter => filter instanceof RegExp ? filter.test(name) : filter === name);
}
module.exports = (str, opts) => {
opts = Object.assign({
normalizeProtocol: true,
normalizeHttps: false,
stripFragment: true,
stripWWW: true,
removeQueryParameters: [/^utm_\w+/i],
removeTrailingSlash: true,
removeDirectoryIndex: false,
sortQueryParameters: true
}, opts);
if (typeof str !== 'string') {
throw new TypeError('Expected a string');
}
const hasRelativeProtocol = str.startsWith('//');
// Prepend protocol
str = prependHttp(str.trim()).replace(/^\/\//, 'http://');
const urlObj = url.parse(str);
if (opts.normalizeHttps && urlObj.protocol === 'https:') {
urlObj.protocol = 'http:';
}
if (!urlObj.hostname && !urlObj.pathname) {
throw new Error('Invalid URL');
}
// Prevent these from being used by `url.format`
delete urlObj.host;
delete urlObj.query;
// Remove fragment
if (opts.stripFragment) {
delete urlObj.hash;
}
// Remove default port
const port = DEFAULT_PORTS[urlObj.protocol];
if (Number(urlObj.port) === port) {
delete urlObj.port;
}
// Remove duplicate slashes
if (urlObj.pathname) {
urlObj.pathname = urlObj.pathname.replace(/\/{2,}/g, '/');
}
// Decode URI octets
if (urlObj.pathname) {
urlObj.pathname = decodeURI(urlObj.pathname);
}
// Remove directory index
if (opts.removeDirectoryIndex === true) {
opts.removeDirectoryIndex = [/^index\.[a-z]+$/];
}
if (Array.isArray(opts.removeDirectoryIndex) && opts.removeDirectoryIndex.length > 0) {
let pathComponents = urlObj.pathname.split('/');
const lastComponent = pathComponents[pathComponents.length - 1];
if (testParameter(lastComponent, opts.removeDirectoryIndex)) {
pathComponents = pathComponents.slice(0, pathComponents.length - 1);
urlObj.pathname = pathComponents.slice(1).join('/') + '/';
}
}
// Resolve relative paths, but only for slashed protocols
if (slashedProtocol[urlObj.protocol]) {
const domain = urlObj.protocol + '//' + urlObj.hostname;
const relative = url.resolve(domain, urlObj.pathname);
urlObj.pathname = relative.replace(domain, '');
}
if (urlObj.hostname) {
// IDN to Unicode
urlObj.hostname = punycode.toUnicode(urlObj.hostname).toLowerCase();
// Remove trailing dot
urlObj.hostname = urlObj.hostname.replace(/\.$/, '');
// Remove `www.`
if (opts.stripWWW) {
urlObj.hostname = urlObj.hostname.replace(/^www\./, '');
}
}
// Remove URL with empty query string
if (urlObj.search === '?') {
delete urlObj.search;
}
const queryParameters = queryString.parse(urlObj.search);
// Remove query unwanted parameters
if (Array.isArray(opts.removeQueryParameters)) {
for (const key in queryParameters) {
if (testParameter(key, opts.removeQueryParameters)) {
delete queryParameters[key];
}
}
}
// Sort query parameters
if (opts.sortQueryParameters) {
urlObj.search = queryString.stringify(sortKeys(queryParameters));
}
// Decode query parameters
if (urlObj.search !== null) {
urlObj.search = decodeURIComponent(urlObj.search);
}
// Take advantage of many of the Node `url` normalizations
str = url.format(urlObj);
// Remove ending `/`
if (opts.removeTrailingSlash || urlObj.pathname === '/') {
str = str.replace(/\/$/, '');
}
// Restore relative protocol, if applicable
if (hasRelativeProtocol && !opts.normalizeProtocol) {
str = str.replace(/^http:\/\//, '//');
}
return str;
};