'use strict'
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/** @type {(value: string) => boolean} */
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const isUUID = RegExp.prototype.test.bind(/^[\da-f]{8}-[\da-f]{4}-[\da-f]{4}-[\da-f]{4}-[\da-f]{12}$/iu)
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/** @type {(value: string) => boolean} */
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const isIPv4 = RegExp.prototype.test.bind(/^(?:(?:25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|\d)\.){3}(?:25[0-5]|2[0-4]\d|1\d{2}|[1-9]\d|\d)$/u)
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/**
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* @param {Array<string>} input
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* @returns {string}
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*/
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function stringArrayToHexStripped (input) {
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let acc = ''
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let code = 0
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let i = 0
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for (i = 0; i < input.length; i++) {
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code = input[i].charCodeAt(0)
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if (code === 48) {
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continue
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}
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if (!((code >= 48 && code <= 57) || (code >= 65 && code <= 70) || (code >= 97 && code <= 102))) {
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return ''
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}
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acc += input[i]
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break
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}
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for (i += 1; i < input.length; i++) {
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code = input[i].charCodeAt(0)
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if (!((code >= 48 && code <= 57) || (code >= 65 && code <= 70) || (code >= 97 && code <= 102))) {
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return ''
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}
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acc += input[i]
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}
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return acc
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}
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/**
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* @typedef {Object} GetIPV6Result
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* @property {boolean} error - Indicates if there was an error parsing the IPv6 address.
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* @property {string} address - The parsed IPv6 address.
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* @property {string} [zone] - The zone identifier, if present.
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*/
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/**
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* @param {string} value
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* @returns {boolean}
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*/
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const nonSimpleDomain = RegExp.prototype.test.bind(/[^!"$&'()*+,\-.;=_`a-z{}~]/u)
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/**
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* @param {Array<string>} buffer
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* @returns {boolean}
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*/
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function consumeIsZone (buffer) {
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buffer.length = 0
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return true
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}
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/**
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* @param {Array<string>} buffer
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* @param {Array<string>} address
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* @param {GetIPV6Result} output
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* @returns {boolean}
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*/
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function consumeHextets (buffer, address, output) {
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if (buffer.length) {
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const hex = stringArrayToHexStripped(buffer)
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if (hex !== '') {
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address.push(hex)
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} else {
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output.error = true
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return false
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}
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buffer.length = 0
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}
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return true
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}
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/**
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* @param {string} input
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* @returns {GetIPV6Result}
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*/
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function getIPV6 (input) {
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let tokenCount = 0
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const output = { error: false, address: '', zone: '' }
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/** @type {Array<string>} */
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const address = []
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/** @type {Array<string>} */
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const buffer = []
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let endipv6Encountered = false
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let endIpv6 = false
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let consume = consumeHextets
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for (let i = 0; i < input.length; i++) {
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const cursor = input[i]
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if (cursor === '[' || cursor === ']') { continue }
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if (cursor === ':') {
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if (endipv6Encountered === true) {
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endIpv6 = true
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}
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if (!consume(buffer, address, output)) { break }
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if (++tokenCount > 7) {
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// not valid
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output.error = true
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break
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}
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if (i > 0 && input[i - 1] === ':') {
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endipv6Encountered = true
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}
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address.push(':')
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continue
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} else if (cursor === '%') {
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if (!consume(buffer, address, output)) { break }
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// switch to zone detection
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consume = consumeIsZone
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} else {
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buffer.push(cursor)
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continue
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}
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}
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if (buffer.length) {
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if (consume === consumeIsZone) {
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output.zone = buffer.join('')
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} else if (endIpv6) {
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address.push(buffer.join(''))
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} else {
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address.push(stringArrayToHexStripped(buffer))
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}
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}
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output.address = address.join('')
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return output
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}
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/**
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* @typedef {Object} NormalizeIPv6Result
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* @property {string} host - The normalized host.
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* @property {string} [escapedHost] - The escaped host.
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* @property {boolean} isIPV6 - Indicates if the host is an IPv6 address.
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*/
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/**
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* @param {string} host
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* @returns {NormalizeIPv6Result}
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*/
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function normalizeIPv6 (host) {
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if (findToken(host, ':') < 2) { return { host, isIPV6: false } }
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const ipv6 = getIPV6(host)
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if (!ipv6.error) {
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let newHost = ipv6.address
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let escapedHost = ipv6.address
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if (ipv6.zone) {
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newHost += '%' + ipv6.zone
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escapedHost += '%25' + ipv6.zone
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}
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return { host: newHost, isIPV6: true, escapedHost }
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} else {
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return { host, isIPV6: false }
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}
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}
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/**
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* @param {string} str
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* @param {string} token
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* @returns {number}
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*/
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function findToken (str, token) {
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let ind = 0
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for (let i = 0; i < str.length; i++) {
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if (str[i] === token) ind++
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}
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return ind
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}
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/**
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* @param {string} path
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* @returns {string}
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*
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* @see https://datatracker.ietf.org/doc/html/rfc3986#section-5.2.4
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*/
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function removeDotSegments (path) {
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let input = path
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const output = []
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let nextSlash = -1
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let len = 0
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// eslint-disable-next-line no-cond-assign
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while (len = input.length) {
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if (len === 1) {
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if (input === '.') {
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break
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} else if (input === '/') {
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output.push('/')
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break
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} else {
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output.push(input)
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break
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}
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} else if (len === 2) {
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if (input[0] === '.') {
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if (input[1] === '.') {
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break
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} else if (input[1] === '/') {
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input = input.slice(2)
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continue
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}
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} else if (input[0] === '/') {
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if (input[1] === '.' || input[1] === '/') {
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output.push('/')
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break
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}
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}
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} else if (len === 3) {
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if (input === '/..') {
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if (output.length !== 0) {
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output.pop()
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}
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output.push('/')
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break
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}
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}
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if (input[0] === '.') {
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if (input[1] === '.') {
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if (input[2] === '/') {
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input = input.slice(3)
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continue
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}
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} else if (input[1] === '/') {
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input = input.slice(2)
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continue
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}
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} else if (input[0] === '/') {
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if (input[1] === '.') {
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if (input[2] === '/') {
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input = input.slice(2)
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continue
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} else if (input[2] === '.') {
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if (input[3] === '/') {
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input = input.slice(3)
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if (output.length !== 0) {
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output.pop()
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}
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continue
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}
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}
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}
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}
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// Rule 2E: Move normal path segment to output
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if ((nextSlash = input.indexOf('/', 1)) === -1) {
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output.push(input)
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break
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} else {
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output.push(input.slice(0, nextSlash))
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input = input.slice(nextSlash)
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}
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}
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return output.join('')
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}
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/**
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* @param {import('../types/index').URIComponent} component
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* @param {boolean} esc
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* @returns {import('../types/index').URIComponent}
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*/
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function normalizeComponentEncoding (component, esc) {
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const func = esc !== true ? escape : unescape
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if (component.scheme !== undefined) {
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component.scheme = func(component.scheme)
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}
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if (component.userinfo !== undefined) {
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component.userinfo = func(component.userinfo)
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}
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if (component.host !== undefined) {
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component.host = func(component.host)
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}
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if (component.path !== undefined) {
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component.path = func(component.path)
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}
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if (component.query !== undefined) {
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component.query = func(component.query)
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}
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if (component.fragment !== undefined) {
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component.fragment = func(component.fragment)
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}
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return component
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}
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/**
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* @param {import('../types/index').URIComponent} component
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* @returns {string|undefined}
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*/
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function recomposeAuthority (component) {
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const uriTokens = []
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if (component.userinfo !== undefined) {
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uriTokens.push(component.userinfo)
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uriTokens.push('@')
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}
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if (component.host !== undefined) {
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let host = unescape(component.host)
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if (!isIPv4(host)) {
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const ipV6res = normalizeIPv6(host)
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if (ipV6res.isIPV6 === true) {
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host = `[${ipV6res.escapedHost}]`
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} else {
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host = component.host
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}
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}
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uriTokens.push(host)
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}
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if (typeof component.port === 'number' || typeof component.port === 'string') {
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uriTokens.push(':')
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uriTokens.push(String(component.port))
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}
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return uriTokens.length ? uriTokens.join('') : undefined
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};
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module.exports = {
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nonSimpleDomain,
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recomposeAuthority,
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normalizeComponentEncoding,
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removeDotSegments,
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isIPv4,
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isUUID,
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normalizeIPv6,
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stringArrayToHexStripped
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}
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