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'use strict';
/**
* Check if `vhost` is a valid suffix of `hostname` (top-domain)
*
* It means that `vhost` needs to be a suffix of `hostname` and we then need to
* make sure that: either they are equal, or the character preceding `vhost` in
* `hostname` is a '.' (it should not be a partial label).
*
* * hostname = 'not.evil.com' and vhost = 'vil.com' => not ok
* * hostname = 'not.evil.com' and vhost = 'evil.com' => ok
* * hostname = 'not.evil.com' and vhost = 'not.evil.com' => ok
*/
function shareSameDomainSuffix(hostname, vhost) {
if (hostname.endsWith(vhost)) {
return (hostname.length === vhost.length ||
hostname[hostname.length - vhost.length - 1] === '.');
}
return false;
}
/**
* Given a hostname and its public suffix, extract the general domain.
*/
function extractDomainWithSuffix(hostname, publicSuffix) {
// Locate the index of the last '.' in the part of the `hostname` preceding
// the public suffix.
//
// examples:
// 1. not.evil.co.uk => evil.co.uk
// ^ ^
// | | start of public suffix
// | index of the last dot
//
// 2. example.co.uk => example.co.uk
// ^ ^
// | | start of public suffix
// |
// | (-1) no dot found before the public suffix
const publicSuffixIndex = hostname.length - publicSuffix.length - 2;
const lastDotBeforeSuffixIndex = hostname.lastIndexOf('.', publicSuffixIndex);
// No '.' found, then `hostname` is the general domain (no sub-domain)
if (lastDotBeforeSuffixIndex === -1) {
return hostname;
}
// Extract the part between the last '.'
return hostname.slice(lastDotBeforeSuffixIndex + 1);
}
/**
* Detects the domain based on rules and upon and a host string
*/
function getDomain(suffix, hostname, options) {
// Check if `hostname` ends with a member of `validHosts`.
if (options.validHosts !== null) {
const validHosts = options.validHosts;
for (const vhost of validHosts) {
if ( /*@__INLINE__*/shareSameDomainSuffix(hostname, vhost)) {
return vhost;
}
}
}
let numberOfLeadingDots = 0;
if (hostname.startsWith('.')) {
while (numberOfLeadingDots < hostname.length &&
hostname[numberOfLeadingDots] === '.') {
numberOfLeadingDots += 1;
}
}
// If `hostname` is a valid public suffix, then there is no domain to return.
// Since we already know that `getPublicSuffix` returns a suffix of `hostname`
// there is no need to perform a string comparison and we only compare the
// size.
if (suffix.length === hostname.length - numberOfLeadingDots) {
return null;
}
// To extract the general domain, we start by identifying the public suffix
// (if any), then consider the domain to be the public suffix with one added
// level of depth. (e.g.: if hostname is `not.evil.co.uk` and public suffix:
// `co.uk`, then we take one more level: `evil`, giving the final result:
// `evil.co.uk`).
return /*@__INLINE__*/ extractDomainWithSuffix(hostname, suffix);
}
/**
* Return the part of domain without suffix.
*
* Example: for domain 'foo.com', the result would be 'foo'.
*/
function getDomainWithoutSuffix(domain, suffix) {
// Note: here `domain` and `suffix` cannot have the same length because in
// this case we set `domain` to `null` instead. It is thus safe to assume
// that `suffix` is shorter than `domain`.
return domain.slice(0, -suffix.length - 1);
}
/**
* @param url - URL we want to extract a hostname from.
* @param urlIsValidHostname - hint from caller; true if `url` is already a valid hostname.
*/
function extractHostname(url, urlIsValidHostname) {
let start = 0;
let end = url.length;
let hasUpper = false;
// If url is not already a valid hostname, then try to extract hostname.
if (!urlIsValidHostname) {
// Special handling of data URLs
if (url.startsWith('data:')) {
return null;
}
// Trim leading spaces
while (start < url.length && url.charCodeAt(start) <= 32) {
start += 1;
}
// Trim trailing spaces
while (end > start + 1 && url.charCodeAt(end - 1) <= 32) {
end -= 1;
}
// Skip scheme.
if (url.charCodeAt(start) === 47 /* '/' */ &&
url.charCodeAt(start + 1) === 47 /* '/' */) {
start += 2;
}
else {
const indexOfProtocol = url.indexOf(':/', start);
if (indexOfProtocol !== -1) {
// Implement fast-path for common protocols. We expect most protocols
// should be one of these 4 and thus we will not need to perform the
// more expansive validity check most of the time.
const protocolSize = indexOfProtocol - start;
const c0 = url.charCodeAt(start);
const c1 = url.charCodeAt(start + 1);
const c2 = url.charCodeAt(start + 2);
const c3 = url.charCodeAt(start + 3);
const c4 = url.charCodeAt(start + 4);
if (protocolSize === 5 &&
c0 === 104 /* 'h' */ &&
c1 === 116 /* 't' */ &&
c2 === 116 /* 't' */ &&
c3 === 112 /* 'p' */ &&
c4 === 115 /* 's' */) ;
else if (protocolSize === 4 &&
c0 === 104 /* 'h' */ &&
c1 === 116 /* 't' */ &&
c2 === 116 /* 't' */ &&
c3 === 112 /* 'p' */) ;
else if (protocolSize === 3 &&
c0 === 119 /* 'w' */ &&
c1 === 115 /* 's' */ &&
c2 === 115 /* 's' */) ;
else if (protocolSize === 2 &&
c0 === 119 /* 'w' */ &&
c1 === 115 /* 's' */) ;
else {
// Check that scheme is valid
for (let i = start; i < indexOfProtocol; i += 1) {
const lowerCaseCode = url.charCodeAt(i) | 32;
if (!(((lowerCaseCode >= 97 && lowerCaseCode <= 122) || // [a, z]
(lowerCaseCode >= 48 && lowerCaseCode <= 57) || // [0, 9]
lowerCaseCode === 46 || // '.'
lowerCaseCode === 45 || // '-'
lowerCaseCode === 43) // '+'
)) {
return null;
}
}
}
// Skip 0, 1 or more '/' after ':/'
start = indexOfProtocol + 2;
while (url.charCodeAt(start) === 47 /* '/' */) {
start += 1;
}
}
}
// Detect first occurrence of '/', '?' or '#'. We also keep track of the
// last occurrence of '@', ']' or ':' to speed-up subsequent parsing of
// (respectively), identifier, ipv6 or port.
let indexOfIdentifier = -1;
let indexOfClosingBracket = -1;
let indexOfPort = -1;
for (let i = start; i < end; i += 1) {
const code = url.charCodeAt(i);
if (code === 35 || // '#'
code === 47 || // '/'
code === 63 // '?'
) {
end = i;
break;
}
else if (code === 64) {
// '@'
indexOfIdentifier = i;
}
else if (code === 93) {
// ']'
indexOfClosingBracket = i;
}
else if (code === 58) {
// ':'
indexOfPort = i;
}
else if (code >= 65 && code <= 90) {
hasUpper = true;
}
}
// Detect identifier: '@'
if (indexOfIdentifier !== -1 &&
indexOfIdentifier > start &&
indexOfIdentifier < end) {
start = indexOfIdentifier + 1;
}
// Handle ipv6 addresses
if (url.charCodeAt(start) === 91 /* '[' */) {
if (indexOfClosingBracket !== -1) {
return url.slice(start + 1, indexOfClosingBracket).toLowerCase();
}
return null;
}
else if (indexOfPort !== -1 && indexOfPort > start && indexOfPort < end) {
// Detect port: ':'
end = indexOfPort;
}
}
// Trim trailing dots
while (end > start + 1 && url.charCodeAt(end - 1) === 46 /* '.' */) {
end -= 1;
}
const hostname = start !== 0 || end !== url.length ? url.slice(start, end) : url;
if (hasUpper) {
return hostname.toLowerCase();
}
return hostname;
}
/**
* Check if a hostname is an IP. You should be aware that this only works
* because `hostname` is already garanteed to be a valid hostname!
*/
function isProbablyIpv4(hostname) {
// Cannot be shorted than 1.1.1.1
if (hostname.length < 7) {
return false;
}
// Cannot be longer than: 255.255.255.255
if (hostname.length > 15) {
return false;
}
let numberOfDots = 0;
for (let i = 0; i < hostname.length; i += 1) {
const code = hostname.charCodeAt(i);
if (code === 46 /* '.' */) {
numberOfDots += 1;
}
else if (code < 48 /* '0' */ || code > 57 /* '9' */) {
return false;
}
}
return (numberOfDots === 3 &&
hostname.charCodeAt(0) !== 46 /* '.' */ &&
hostname.charCodeAt(hostname.length - 1) !== 46 /* '.' */);
}
/**
* Similar to isProbablyIpv4.
*/
function isProbablyIpv6(hostname) {
if (hostname.length < 3) {
return false;
}
let start = hostname.startsWith('[') ? 1 : 0;
let end = hostname.length;
if (hostname[end - 1] === ']') {
end -= 1;
}
// We only consider the maximum size of a normal IPV6. Note that this will
// fail on so-called "IPv4 mapped IPv6 addresses" but this is a corner-case
// and a proper validation library should be used for these.
if (end - start > 39) {
return false;
}
let hasColon = false;
for (; start < end; start += 1) {
const code = hostname.charCodeAt(start);
if (code === 58 /* ':' */) {
hasColon = true;
}
else if (!(((code >= 48 && code <= 57) || // 0-9
(code >= 97 && code <= 102) || // a-f
(code >= 65 && code <= 90)) // A-F
)) {
return false;
}
}
return hasColon;
}
/**
* Check if `hostname` is *probably* a valid ip addr (either ipv6 or ipv4).
* This *will not* work on any string. We need `hostname` to be a valid
* hostname.
*/
function isIp(hostname) {
return isProbablyIpv6(hostname) || isProbablyIpv4(hostname);
}
/**
* Implements fast shallow verification of hostnames. This does not perform a
* struct check on the content of labels (classes of Unicode characters, etc.)
* but instead check that the structure is valid (number of labels, length of
* labels, etc.).
*
* If you need stricter validation, consider using an external library.
*/
function isValidAscii(code) {
return ((code >= 97 && code <= 122) || (code >= 48 && code <= 57) || code > 127);
}
/**
* Check if a hostname string is valid. It's usually a preliminary check before
* trying to use getDomain or anything else.
*
* Beware: it does not check if the TLD exists.
*/
function isValidHostname (hostname) {
if (hostname.length > 255) {
return false;
}
if (hostname.length === 0) {
return false;
}
if (
/*@__INLINE__*/ !isValidAscii(hostname.charCodeAt(0)) &&
hostname.charCodeAt(0) !== 46 && // '.' (dot)
hostname.charCodeAt(0) !== 95 // '_' (underscore)
) {
return false;
}
// Validate hostname according to RFC
let lastDotIndex = -1;
let lastCharCode = -1;
const len = hostname.length;
for (let i = 0; i < len; i += 1) {
const code = hostname.charCodeAt(i);
if (code === 46 /* '.' */) {
if (
// Check that previous label is < 63 bytes long (64 = 63 + '.')
i - lastDotIndex > 64 ||
// Check that previous character was not already a '.'
lastCharCode === 46 ||
// Check that the previous label does not end with a '-' (dash)
lastCharCode === 45 ||
// Check that the previous label does not end with a '_' (underscore)
lastCharCode === 95) {
return false;
}
lastDotIndex = i;
}
else if (!( /*@__INLINE__*/(isValidAscii(code) || code === 45 || code === 95))) {
// Check if there is a forbidden character in the label
return false;
}
lastCharCode = code;
}
return (
// Check that last label is shorter than 63 chars
len - lastDotIndex - 1 <= 63 &&
// Check that the last character is an allowed trailing label character.
// Since we already checked that the char is a valid hostname character,
// we only need to check that it's different from '-'.
lastCharCode !== 45);
}
function setDefaultsImpl({ allowIcannDomains = true, allowPrivateDomains = false, detectIp = true, extractHostname = true, mixedInputs = true, validHosts = null, validateHostname = true, }) {
return {
allowIcannDomains,
allowPrivateDomains,
detectIp,
extractHostname,
mixedInputs,
validHosts,
validateHostname,
};
}
const DEFAULT_OPTIONS = /*@__INLINE__*/ setDefaultsImpl({});
function setDefaults(options) {
if (options === undefined) {
return DEFAULT_OPTIONS;
}
return /*@__INLINE__*/ setDefaultsImpl(options);
}
/**
* Returns the subdomain of a hostname string
*/
function getSubdomain(hostname, domain) {
// If `hostname` and `domain` are the same, then there is no sub-domain
if (domain.length === hostname.length) {
return '';
}
return hostname.slice(0, -domain.length - 1);
}
/**
* Implement a factory allowing to plug different implementations of suffix
* lookup (e.g.: using a trie or the packed hashes datastructures). This is used
* and exposed in `tldts.ts` and `tldts-experimental.ts` bundle entrypoints.
*/
function getEmptyResult() {
return {
domain: null,
domainWithoutSuffix: null,
hostname: null,
isIcann: null,
isIp: null,
isPrivate: null,
publicSuffix: null,
subdomain: null,
};
}
function resetResult(result) {
result.domain = null;
result.domainWithoutSuffix = null;
result.hostname = null;
result.isIcann = null;
result.isIp = null;
result.isPrivate = null;
result.publicSuffix = null;
result.subdomain = null;
}
function parseImpl(url, step, suffixLookup, partialOptions, result) {
const options = /*@__INLINE__*/ setDefaults(partialOptions);
// Very fast approximate check to make sure `url` is a string. This is needed
// because the library will not necessarily be used in a typed setup and
// values of arbitrary types might be given as argument.
if (typeof url !== 'string') {
return result;
}
// Extract hostname from `url` only if needed. This can be made optional
// using `options.extractHostname`. This option will typically be used
// whenever we are sure the inputs to `parse` are already hostnames and not
// arbitrary URLs.
//
// `mixedInput` allows to specify if we expect a mix of URLs and hostnames
// as input. If only hostnames are expected then `extractHostname` can be
// set to `false` to speed-up parsing. If only URLs are expected then
// `mixedInputs` can be set to `false`. The `mixedInputs` is only a hint
// and will not change the behavior of the library.
if (!options.extractHostname) {
result.hostname = url;
}
else if (options.mixedInputs) {
result.hostname = extractHostname(url, isValidHostname(url));
}
else {
result.hostname = extractHostname(url, false);
}
if (step === 0 /* FLAG.HOSTNAME */ || result.hostname === null) {
return result;
}
// Check if `hostname` is a valid ip address
if (options.detectIp) {
result.isIp = isIp(result.hostname);
if (result.isIp) {
return result;
}
}
// Perform optional hostname validation. If hostname is not valid, no need to
// go further as there will be no valid domain or sub-domain.
if (options.validateHostname &&
options.extractHostname &&
!isValidHostname(result.hostname)) {
result.hostname = null;
return result;
}
// Extract public suffix
suffixLookup(result.hostname, options, result);
if (step === 2 /* FLAG.PUBLIC_SUFFIX */ || result.publicSuffix === null) {
return result;
}
// Extract domain
result.domain = getDomain(result.publicSuffix, result.hostname, options);
if (step === 3 /* FLAG.DOMAIN */ || result.domain === null) {
return result;
}
// Extract subdomain
result.subdomain = getSubdomain(result.hostname, result.domain);
if (step === 4 /* FLAG.SUB_DOMAIN */) {
return result;
}
// Extract domain without suffix
result.domainWithoutSuffix = getDomainWithoutSuffix(result.domain, result.publicSuffix);
return result;
}
function fastPath (hostname, options, out) {
// Fast path for very popular suffixes; this allows to by-pass lookup
// completely as well as any extra allocation or string manipulation.
if (!options.allowPrivateDomains && hostname.length > 3) {
const last = hostname.length - 1;
const c3 = hostname.charCodeAt(last);
const c2 = hostname.charCodeAt(last - 1);
const c1 = hostname.charCodeAt(last - 2);
const c0 = hostname.charCodeAt(last - 3);
if (c3 === 109 /* 'm' */ &&
c2 === 111 /* 'o' */ &&
c1 === 99 /* 'c' */ &&
c0 === 46 /* '.' */) {
out.isIcann = true;
out.isPrivate = false;
out.publicSuffix = 'com';
return true;
}
else if (c3 === 103 /* 'g' */ &&
c2 === 114 /* 'r' */ &&
c1 === 111 /* 'o' */ &&
c0 === 46 /* '.' */) {
out.isIcann = true;
out.isPrivate = false;
out.publicSuffix = 'org';
return true;
}
else if (c3 === 117 /* 'u' */ &&
c2 === 100 /* 'd' */ &&
c1 === 101 /* 'e' */ &&
c0 === 46 /* '.' */) {
out.isIcann = true;
out.isPrivate = false;
out.publicSuffix = 'edu';
return true;
}
else if (c3 === 118 /* 'v' */ &&
c2 === 111 /* 'o' */ &&
c1 === 103 /* 'g' */ &&
c0 === 46 /* '.' */) {
out.isIcann = true;
out.isPrivate = false;
out.publicSuffix = 'gov';
return true;
}
else if (c3 === 116 /* 't' */ &&
c2 === 101 /* 'e' */ &&
c1 === 110 /* 'n' */ &&
c0 === 46 /* '.' */) {
out.isIcann = true;
out.isPrivate = false;
out.publicSuffix = 'net';
return true;
}
else if (c3 === 101 /* 'e' */ &&
c2 === 100 /* 'd' */ &&
c1 === 46 /* '.' */) {
out.isIcann = true;
out.isPrivate = false;
out.publicSuffix = 'de';
return true;
}
}
return false;
}
exports.fastPathLookup = fastPath;
exports.getEmptyResult = getEmptyResult;
exports.parseImpl = parseImpl;
exports.resetResult = resetResult;
exports.setDefaults = setDefaults;
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