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Copy pathurl.js
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1042 lines (936 loc) · 31.7 KB
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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const {
Boolean,
Int8Array,
ObjectAssign,
ObjectKeys,
StringPrototypeCharCodeAt,
decodeURIComponent,
} = primordials;
const { URLPattern } = internalBinding('url_pattern');
const { toASCII } = internalBinding('encoding_binding');
const { encodeStr, hexTable } = require('internal/querystring');
const querystring = require('querystring');
const {
ERR_INVALID_ARG_TYPE,
ERR_INVALID_URL,
} = require('internal/errors').codes;
const {
validateString,
validateObject,
} = require('internal/validators');
// This ensures setURLConstructor() is called before the native
// URL::ToObject() method is used.
const { spliceOne } = require('internal/util');
const { isInsideNodeModules } = internalBinding('util');
// WHATWG URL implementation provided by internal/url
const {
URL,
URLSearchParams,
domainToASCII,
domainToUnicode,
fileURLToPath,
pathToFileURL: _pathToFileURL,
urlToHttpOptions,
unsafeProtocol,
hostlessProtocol,
slashedProtocol,
} = require('internal/url');
const bindingUrl = internalBinding('url');
// Original url.parse() API
function Url() {
this.protocol = null;
this.slashes = null;
this.auth = null;
this.host = null;
this.port = null;
this.hostname = null;
this.hash = null;
this.search = null;
this.query = null;
this.pathname = null;
this.path = null;
this.href = null;
}
// Reference: RFC 3986, RFC 1808, RFC 2396
// define these here so at least they only have to be
// compiled once on the first module load.
const protocolPattern = /^[a-z0-9.+-]+:/i;
const portPattern = /:[0-9]*$/;
const hostPattern = /^\/\/[^@/]+@[^@/]+/;
// Special case for a simple path URL
const simplePathPattern = /^(\/\/?(?!\/)[^?\s]*)(\?[^\s]*)?$/;
const hostnameMaxLen = 255;
const {
CHAR_SPACE,
CHAR_TAB,
CHAR_CARRIAGE_RETURN,
CHAR_LINE_FEED,
CHAR_NO_BREAK_SPACE,
CHAR_ZERO_WIDTH_NOBREAK_SPACE,
CHAR_HASH,
CHAR_FORWARD_SLASH,
CHAR_LEFT_SQUARE_BRACKET,
CHAR_RIGHT_SQUARE_BRACKET,
CHAR_LEFT_ANGLE_BRACKET,
CHAR_RIGHT_ANGLE_BRACKET,
CHAR_LEFT_CURLY_BRACKET,
CHAR_RIGHT_CURLY_BRACKET,
CHAR_QUESTION_MARK,
CHAR_DOUBLE_QUOTE,
CHAR_SINGLE_QUOTE,
CHAR_PERCENT,
CHAR_SEMICOLON,
CHAR_BACKWARD_SLASH,
CHAR_CIRCUMFLEX_ACCENT,
CHAR_GRAVE_ACCENT,
CHAR_VERTICAL_LINE,
CHAR_AT,
CHAR_COLON,
} = require('internal/constants');
let urlParseWarned = false;
function urlParse(url, parseQueryString, slashesDenoteHost) {
if (!urlParseWarned && !isInsideNodeModules(100, true)) {
urlParseWarned = true;
process.emitWarning(
'`url.parse()` behavior is not standardized and prone to ' +
'errors that have security implications. Use the WHATWG URL API ' +
'instead. CVEs are not issued for `url.parse()` vulnerabilities.',
'DeprecationWarning',
'DEP0169',
);
}
if (url instanceof Url) return url;
const urlObject = new Url();
urlObject.parse(url, parseQueryString, slashesDenoteHost);
return urlObject;
}
function isIpv6Hostname(hostname) {
return (
StringPrototypeCharCodeAt(hostname, 0) === CHAR_LEFT_SQUARE_BRACKET &&
StringPrototypeCharCodeAt(hostname, hostname.length - 1) ===
CHAR_RIGHT_SQUARE_BRACKET
);
}
// This prevents some common spoofing bugs due to our use of IDNA toASCII. For
// compatibility, the set of characters we use here is the *intersection* of
// "forbidden host code point" in the WHATWG URL Standard [1] and the
// characters in the host parsing loop in Url.prototype.parse, with the
// following additions:
//
// - ':' since this could cause a "protocol spoofing" bug
// - '@' since this could cause parts of the hostname to be confused with auth
// - '[' and ']' since this could cause a non-IPv6 hostname to be interpreted
// as IPv6 by isIpv6Hostname above
//
// [1]: https://url.spec.whatwg.org/#forbidden-host-code-point
const forbiddenHostChars = /[\0\t\n\r #%/:<>?@[\\\]^|]/;
// For IPv6, permit '[', ']', and ':'.
const forbiddenHostCharsIpv6 = /[\0\t\n\r #%/<>?@\\^|]/;
Url.prototype.parse = function parse(url, parseQueryString, slashesDenoteHost) {
validateString(url, 'url');
// Copy chrome, IE, opera backslash-handling behavior.
// Back slashes before the query string get converted to forward slashes
// See: https://code.google.com/p/chromium/issues/detail?id=25916
let hasHash = false;
let hasAt = false;
let start = -1;
let end = -1;
let rest = '';
let lastPos = 0;
for (let i = 0, inWs = false, split = false; i < url.length; ++i) {
const code = url.charCodeAt(i);
// Find first and last non-whitespace characters for trimming
const isWs = code < 33 ||
code === CHAR_NO_BREAK_SPACE ||
code === CHAR_ZERO_WIDTH_NOBREAK_SPACE;
if (start === -1) {
if (isWs)
continue;
lastPos = start = i;
} else if (inWs) {
if (!isWs) {
end = -1;
inWs = false;
}
} else if (isWs) {
end = i;
inWs = true;
}
// Only convert backslashes while we haven't seen a split character
if (!split) {
switch (code) {
case CHAR_AT:
hasAt = true;
break;
case CHAR_HASH:
hasHash = true;
// Fall through
case CHAR_QUESTION_MARK:
split = true;
break;
case CHAR_BACKWARD_SLASH:
if (i - lastPos > 0)
rest += url.slice(lastPos, i);
rest += '/';
lastPos = i + 1;
break;
}
} else if (!hasHash && code === CHAR_HASH) {
hasHash = true;
}
}
// Check if string was non-empty (including strings with only whitespace)
if (start !== -1) {
if (lastPos === start) {
// We didn't convert any backslashes
if (end === -1) {
if (start === 0)
rest = url;
else
rest = url.slice(start);
} else {
rest = url.slice(start, end);
}
} else if (end === -1 && lastPos < url.length) {
// We converted some backslashes and have only part of the entire string
rest += url.slice(lastPos);
} else if (end !== -1 && lastPos < end) {
// We converted some backslashes and have only part of the entire string
rest += url.slice(lastPos, end);
}
}
if (!slashesDenoteHost && !hasHash && !hasAt) {
// Try fast path regexp
const simplePath = simplePathPattern.exec(rest);
if (simplePath) {
this.path = rest;
this.href = rest;
this.pathname = simplePath[1];
if (simplePath[2]) {
this.search = simplePath[2];
if (parseQueryString) {
this.query = querystring.parse(this.search.slice(1));
} else {
this.query = this.search.slice(1);
}
} else if (parseQueryString) {
this.search = null;
this.query = { __proto__: null };
}
return this;
}
}
let proto = protocolPattern.exec(rest);
let lowerProto;
if (proto) {
proto = proto[0];
lowerProto = proto.toLowerCase();
this.protocol = lowerProto;
rest = rest.slice(proto.length);
}
// Figure out if it's got a host
// user@server is *always* interpreted as a hostname, and url
// resolution will treat //foo/bar as host=foo,path=bar because that's
// how the browser resolves relative URLs.
let slashes;
if (slashesDenoteHost || proto || hostPattern.test(rest)) {
slashes = rest.charCodeAt(0) === CHAR_FORWARD_SLASH &&
rest.charCodeAt(1) === CHAR_FORWARD_SLASH;
if (slashes && !(proto && hostlessProtocol.has(lowerProto))) {
rest = rest.slice(2);
this.slashes = true;
}
}
if (!hostlessProtocol.has(lowerProto) &&
(slashes || (proto && !slashedProtocol.has(proto)))) {
// there's a hostname.
// the first instance of /, ?, ;, or # ends the host.
//
// If there is an @ in the hostname, then non-host chars *are* allowed
// to the left of the last @ sign, unless some host-ending character
// comes *before* the @-sign.
// URLs are obnoxious.
//
// ex:
// http://a@b@c/ => user:a@b host:c
// http://a@b?@c => user:a host:b path:/?@c
let hostEnd = -1;
let atSign = -1;
let nonHost = -1;
for (let i = 0; i < rest.length; ++i) {
switch (rest.charCodeAt(i)) {
case CHAR_TAB:
case CHAR_LINE_FEED:
case CHAR_CARRIAGE_RETURN:
// WHATWG URL removes tabs, newlines, and carriage returns. Let's do that too.
rest = rest.slice(0, i) + rest.slice(i + 1);
i -= 1;
break;
case CHAR_SPACE:
case CHAR_DOUBLE_QUOTE:
case CHAR_PERCENT:
case CHAR_SINGLE_QUOTE:
case CHAR_SEMICOLON:
case CHAR_LEFT_ANGLE_BRACKET:
case CHAR_RIGHT_ANGLE_BRACKET:
case CHAR_BACKWARD_SLASH:
case CHAR_CIRCUMFLEX_ACCENT:
case CHAR_GRAVE_ACCENT:
case CHAR_LEFT_CURLY_BRACKET:
case CHAR_VERTICAL_LINE:
case CHAR_RIGHT_CURLY_BRACKET:
// Characters that are never ever allowed in a hostname from RFC 2396
if (nonHost === -1)
nonHost = i;
break;
case CHAR_HASH:
case CHAR_FORWARD_SLASH:
case CHAR_QUESTION_MARK:
// Find the first instance of any host-ending characters
if (nonHost === -1)
nonHost = i;
hostEnd = i;
break;
case CHAR_AT:
// At this point, either we have an explicit point where the
// auth portion cannot go past, or the last @ char is the decider.
atSign = i;
nonHost = -1;
break;
}
if (hostEnd !== -1)
break;
}
start = 0;
if (atSign !== -1) {
this.auth = decodeURIComponent(rest.slice(0, atSign));
start = atSign + 1;
}
if (nonHost === -1) {
this.host = rest.slice(start);
rest = '';
} else {
this.host = rest.slice(start, nonHost);
rest = rest.slice(nonHost);
}
// pull out port.
this.parseHost();
// We've indicated that there is a hostname,
// so even if it's empty, it has to be present.
if (typeof this.hostname !== 'string')
this.hostname = '';
const hostname = this.hostname;
// If hostname begins with [ and ends with ]
// assume that it's an IPv6 address.
const ipv6Hostname = isIpv6Hostname(hostname);
// validate a little.
if (!ipv6Hostname) {
rest = getHostname(this, rest, hostname, url);
}
if (this.hostname.length > hostnameMaxLen) {
this.hostname = '';
} else {
// Hostnames are always lower case.
this.hostname = this.hostname.toLowerCase();
}
if (this.hostname !== '') {
if (ipv6Hostname) {
if (forbiddenHostCharsIpv6.test(this.hostname)) {
throw new ERR_INVALID_URL(url);
}
} else {
// IDNA Support: Returns a punycoded representation of "domain".
// It only converts parts of the domain name that
// have non-ASCII characters, i.e. it doesn't matter if
// you call it with a domain that already is ASCII-only.
this.hostname = toASCII(this.hostname);
// Prevent two potential routes of hostname spoofing.
// 1. If this.hostname is empty, it must have become empty due to toASCII
// since we checked this.hostname above.
// 2. If any of forbiddenHostChars appears in this.hostname, it must have
// also gotten in due to toASCII. This is since getHostname would have
// filtered them out otherwise.
// Rather than trying to correct this by moving the non-host part into
// the pathname as we've done in getHostname, throw an exception to
// convey the severity of this issue.
if (this.hostname === '' || forbiddenHostChars.test(this.hostname)) {
throw new ERR_INVALID_URL(url);
}
}
}
const p = this.port ? ':' + this.port : '';
const h = this.hostname || '';
this.host = h + p;
// strip [ and ] from the hostname
// the host field still retains them, though
if (ipv6Hostname) {
this.hostname = this.hostname.slice(1, -1);
if (rest[0] !== '/') {
rest = '/' + rest;
}
}
}
// Now rest is set to the post-host stuff.
// Chop off any delim chars.
if (!unsafeProtocol.has(lowerProto)) {
// First, make 100% sure that any "autoEscape" chars get
// escaped, even if encodeURIComponent doesn't think they
// need to be.
rest = autoEscapeStr(rest);
}
let questionIdx = -1;
let hashIdx = -1;
for (let i = 0; i < rest.length; ++i) {
const code = rest.charCodeAt(i);
if (code === CHAR_HASH) {
this.hash = rest.slice(i);
hashIdx = i;
break;
} else if (code === CHAR_QUESTION_MARK && questionIdx === -1) {
questionIdx = i;
}
}
if (questionIdx !== -1) {
if (hashIdx === -1) {
this.search = rest.slice(questionIdx);
this.query = rest.slice(questionIdx + 1);
} else {
this.search = rest.slice(questionIdx, hashIdx);
this.query = rest.slice(questionIdx + 1, hashIdx);
}
if (parseQueryString) {
this.query = querystring.parse(this.query);
}
} else if (parseQueryString) {
// No query string, but parseQueryString still requested
this.search = null;
this.query = { __proto__: null };
}
const useQuestionIdx =
questionIdx !== -1 && (hashIdx === -1 || questionIdx < hashIdx);
const firstIdx = useQuestionIdx ? questionIdx : hashIdx;
if (firstIdx === -1) {
if (rest.length > 0)
this.pathname = rest;
} else if (firstIdx > 0) {
this.pathname = rest.slice(0, firstIdx);
}
if (slashedProtocol.has(lowerProto) &&
this.hostname && !this.pathname) {
this.pathname = '/';
}
// To support http.request
if (this.pathname || this.search) {
const p = this.pathname || '';
const s = this.search || '';
this.path = p + s;
}
// Finally, reconstruct the href based on what has been validated.
this.href = this.format();
return this;
};
let warnInvalidPort = true;
function getHostname(self, rest, hostname, url) {
for (let i = 0; i < hostname.length; ++i) {
const code = hostname.charCodeAt(i);
const isValid = (code !== CHAR_FORWARD_SLASH &&
code !== CHAR_BACKWARD_SLASH &&
code !== CHAR_HASH &&
code !== CHAR_QUESTION_MARK &&
code !== CHAR_COLON);
if (!isValid) {
// If leftover starts with :, then it represents an invalid port.
// But url.parse() is lenient about it for now.
// Issue a warning and continue.
if (warnInvalidPort && code === CHAR_COLON) {
const detail = `The URL ${url} is invalid. Future versions of Node.js will throw an error.`;
process.emitWarning(detail, 'DeprecationWarning', 'DEP0170');
warnInvalidPort = false;
}
self.hostname = hostname.slice(0, i);
return `/${hostname.slice(i)}${rest}`;
}
}
return rest;
}
// Escaped characters. Use empty strings to fill up unused entries.
// Using Array is faster than Object/Map
const escapedCodes = [
/* 0 - 9 */ '', '', '', '', '', '', '', '', '', '%09',
/* 10 - 19 */ '%0A', '', '', '%0D', '', '', '', '', '', '',
/* 20 - 29 */ '', '', '', '', '', '', '', '', '', '',
/* 30 - 39 */ '', '', '%20', '', '%22', '', '', '', '', '%27',
/* 40 - 49 */ '', '', '', '', '', '', '', '', '', '',
/* 50 - 59 */ '', '', '', '', '', '', '', '', '', '',
/* 60 - 69 */ '%3C', '', '%3E', '', '', '', '', '', '', '',
/* 70 - 79 */ '', '', '', '', '', '', '', '', '', '',
/* 80 - 89 */ '', '', '', '', '', '', '', '', '', '',
/* 90 - 99 */ '', '', '%5C', '', '%5E', '', '%60', '', '', '',
/* 100 - 109 */ '', '', '', '', '', '', '', '', '', '',
/* 110 - 119 */ '', '', '', '', '', '', '', '', '', '',
/* 120 - 125 */ '', '', '', '%7B', '%7C', '%7D',
];
// Automatically escape all delimiters and unwise characters from RFC 2396.
// Also escape single quotes in case of an XSS attack.
// Return the escaped string.
function autoEscapeStr(rest) {
let escaped = '';
let lastEscapedPos = 0;
for (let i = 0; i < rest.length; ++i) {
// `escaped` contains substring up to the last escaped character.
const escapedChar = escapedCodes[rest.charCodeAt(i)];
if (escapedChar) {
// Concat if there are ordinary characters in the middle.
if (i > lastEscapedPos)
escaped += rest.slice(lastEscapedPos, i);
escaped += escapedChar;
lastEscapedPos = i + 1;
}
}
if (lastEscapedPos === 0) // Nothing has been escaped.
return rest;
// There are ordinary characters at the end.
if (lastEscapedPos < rest.length)
escaped += rest.slice(lastEscapedPos);
return escaped;
}
// Format a parsed object into a url string
function urlFormat(urlObject, options) {
// Ensure it's an object, and not a string url.
// If it's an object, this is a no-op.
// this way, you can call urlParse() on strings
// to clean up potentially wonky urls.
if (typeof urlObject === 'string') {
urlObject = urlParse(urlObject);
} else if (typeof urlObject !== 'object' || urlObject === null) {
throw new ERR_INVALID_ARG_TYPE('urlObject',
['Object', 'string'], urlObject);
} else if (urlObject instanceof URL) {
let fragment = true;
let unicode = false;
let search = true;
let auth = true;
if (options) {
validateObject(options, 'options');
if (options.fragment != null) {
fragment = Boolean(options.fragment);
}
if (options.unicode != null) {
unicode = Boolean(options.unicode);
}
if (options.search != null) {
search = Boolean(options.search);
}
if (options.auth != null) {
auth = Boolean(options.auth);
}
}
return bindingUrl.format(urlObject.href, fragment, unicode, search, auth);
}
return Url.prototype.format.call(urlObject);
}
// These characters do not need escaping:
// ! - . _ ~
// ' ( ) * :
// digits
// alpha (uppercase)
// alpha (lowercase)
const noEscapeAuth = new Int8Array([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x00 - 0x0F
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0x10 - 0x1F
0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 0, // 0x20 - 0x2F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, // 0x30 - 0x3F
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x40 - 0x4F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, // 0x50 - 0x5F
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 0x60 - 0x6F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, // 0x70 - 0x7F
]);
Url.prototype.format = function format() {
let auth = this.auth || '';
if (auth) {
auth = encodeStr(auth, noEscapeAuth, hexTable);
auth += '@';
}
let protocol = this.protocol || '';
let pathname = this.pathname || '';
let hash = this.hash || '';
let host = '';
let query = '';
if (this.host) {
host = auth + this.host;
} else if (this.hostname) {
host = auth + (
this.hostname.includes(':') && !isIpv6Hostname(this.hostname) ?
'[' + this.hostname + ']' :
this.hostname
);
if (this.port) {
host += ':' + this.port;
}
}
if (this.query !== null && typeof this.query === 'object') {
query = querystring.stringify(this.query);
}
let search = this.search || (query && ('?' + query)) || '';
if (protocol && protocol.charCodeAt(protocol.length - 1) !== 58/* : */)
protocol += ':';
let newPathname = '';
let lastPos = 0;
for (let i = 0; i < pathname.length; ++i) {
switch (pathname.charCodeAt(i)) {
case CHAR_HASH:
if (i - lastPos > 0)
newPathname += pathname.slice(lastPos, i);
newPathname += '%23';
lastPos = i + 1;
break;
case CHAR_QUESTION_MARK:
if (i - lastPos > 0)
newPathname += pathname.slice(lastPos, i);
newPathname += '%3F';
lastPos = i + 1;
break;
}
}
if (lastPos > 0) {
if (lastPos !== pathname.length)
pathname = newPathname + pathname.slice(lastPos);
else
pathname = newPathname;
}
// Only the slashedProtocols get the //. Not mailto:, xmpp:, etc.
// unless they had them to begin with.
if (this.slashes || slashedProtocol.has(protocol)) {
if (this.slashes || host) {
if (pathname && pathname.charCodeAt(0) !== CHAR_FORWARD_SLASH)
pathname = '/' + pathname;
host = '//' + host;
} else if (protocol.length >= 4 &&
protocol.charCodeAt(0) === 102/* f */ &&
protocol.charCodeAt(1) === 105/* i */ &&
protocol.charCodeAt(2) === 108/* l */ &&
protocol.charCodeAt(3) === 101/* e */) {
host = '//';
}
}
search = search.replaceAll('#', '%23');
if (hash && hash.charCodeAt(0) !== CHAR_HASH)
hash = '#' + hash;
if (search && search.charCodeAt(0) !== CHAR_QUESTION_MARK)
search = '?' + search;
return protocol + host + pathname + search + hash;
};
function urlResolve(source, relative) {
return urlParse(source, false, true).resolve(relative);
}
Url.prototype.resolve = function resolve(relative) {
return this.resolveObject(urlParse(relative, false, true)).format();
};
function urlResolveObject(source, relative) {
if (!source) return relative;
return urlParse(source, false, true).resolveObject(relative);
}
Url.prototype.resolveObject = function resolveObject(relative) {
if (typeof relative === 'string') {
const rel = new Url();
rel.parse(relative, false, true);
relative = rel;
}
const result = new Url();
ObjectAssign(result, this);
// Hash is always overridden, no matter what.
// even href="" will remove it.
result.hash = relative.hash;
// If the relative url is empty, then there's nothing left to do here.
if (relative.href === '') {
result.href = result.format();
return result;
}
// Hrefs like //foo/bar always cut to the protocol.
if (relative.slashes && !relative.protocol) {
// Take everything except the protocol from relative
const relativeWithoutProtocol = ObjectKeys(relative).reduce((acc, key) => {
if (key !== 'protocol') {
acc[key] = relative[key];
}
return acc;
}, {});
ObjectAssign(result, relativeWithoutProtocol);
// urlParse appends trailing / to urls like http://www.example.com
if (slashedProtocol.has(result.protocol) &&
result.hostname && !result.pathname) {
result.path = result.pathname = '/';
}
result.href = result.format();
return result;
}
if (relative.protocol && relative.protocol !== result.protocol) {
// If it's a known url protocol, then changing
// the protocol does weird things
// first, if it's not file:, then we MUST have a host,
// and if there was a path
// to begin with, then we MUST have a path.
// if it is file:, then the host is dropped,
// because that's known to be hostless.
// anything else is assumed to be absolute.
if (!slashedProtocol.has(relative.protocol)) {
ObjectAssign(result, relative);
result.href = result.format();
return result;
}
result.protocol = relative.protocol;
if (!relative.host &&
!/^file:?$/.test(relative.protocol) &&
!hostlessProtocol.has(relative.protocol)) {
const relPath = (relative.pathname || '').split('/');
while (relPath.length && !(relative.host = relPath.shift()));
relative.host ||= '';
relative.hostname ||= '';
if (relPath[0] !== '') relPath.unshift('');
if (relPath.length < 2) relPath.unshift('');
result.pathname = relPath.join('/');
} else {
result.pathname = relative.pathname;
}
result.search = relative.search;
result.query = relative.query;
result.host = relative.host || '';
result.auth = relative.auth;
result.hostname = relative.hostname || relative.host;
result.port = relative.port;
// To support http.request
if (result.pathname || result.search) {
const p = result.pathname || '';
const s = result.search || '';
result.path = p + s;
}
result.slashes ||= relative.slashes;
result.href = result.format();
return result;
}
const isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/');
const isRelAbs = (
relative.host || (relative.pathname && relative.pathname.charAt(0) === '/')
);
let mustEndAbs = (isRelAbs || isSourceAbs ||
(result.host && relative.pathname));
const removeAllDots = mustEndAbs;
let srcPath = (result.pathname && result.pathname.split('/')) || [];
const relPath = (relative.pathname && relative.pathname.split('/')) || [];
const noLeadingSlashes = result.protocol &&
!slashedProtocol.has(result.protocol);
// If the url is a non-slashed url, then relative
// links like ../.. should be able
// to crawl up to the hostname, as well. This is strange.
// result.protocol has already been set by now.
// Later on, put the first path part into the host field.
if (noLeadingSlashes) {
result.hostname = '';
result.port = null;
if (result.host) {
if (srcPath[0] === '') srcPath[0] = result.host;
else srcPath.unshift(result.host);
}
result.host = '';
if (relative.protocol) {
relative.hostname = null;
relative.port = null;
result.auth = null;
if (relative.host) {
if (relPath[0] === '') relPath[0] = relative.host;
else relPath.unshift(relative.host);
}
relative.host = null;
}
mustEndAbs &&= (relPath[0] === '' || srcPath[0] === '');
}
if (isRelAbs) {
// it's absolute.
if (relative.host || relative.host === '') {
if (result.host !== relative.host) result.auth = null;
result.host = relative.host;
result.port = relative.port;
}
if (relative.hostname || relative.hostname === '') {
if (result.hostname !== relative.hostname) result.auth = null;
result.hostname = relative.hostname;
}
result.search = relative.search;
result.query = relative.query;
srcPath = relPath;
// Fall through to the dot-handling below.
} else if (relPath.length) {
// it's relative
// throw away the existing file, and take the new path instead.
srcPath ||= [];
srcPath.pop();
srcPath = srcPath.concat(relPath);
result.search = relative.search;
result.query = relative.query;
} else if (relative.search !== null && relative.search !== undefined) {
// Just pull out the search.
// like href='?foo'.
// Put this after the other two cases because it simplifies the booleans
if (noLeadingSlashes) {
result.hostname = result.host = srcPath.shift();
// Occasionally the auth can get stuck only in host.
// This especially happens in cases like
// url.resolveObject('mailto:local1@domain1', 'local2@domain2')
const authInHost =
result.host && result.host.indexOf('@') > 0 && result.host.split('@');
if (authInHost) {
result.auth = authInHost.shift();
result.host = result.hostname = authInHost.shift();
}
}
result.search = relative.search;
result.query = relative.query;
// To support http.request
if (result.pathname !== null || result.search !== null) {
result.path = (result.pathname ? result.pathname : '') +
(result.search ? result.search : '');
}
result.href = result.format();
return result;
}
if (!srcPath.length) {
// No path at all. All other things were already handled above.
result.pathname = null;
// To support http.request
if (result.search) {
result.path = '/' + result.search;
} else {
result.path = null;
}
result.href = result.format();
return result;
}
// If a url ENDs in . or .., then it must get a trailing slash.
// however, if it ends in anything else non-slashy,
// then it must NOT get a trailing slash.
let last = srcPath.slice(-1)[0];
const hasTrailingSlash = (
((result.host || relative.host || srcPath.length > 1) &&
(last === '.' || last === '..')) || last === '');
// Strip single dots, resolve double dots to parent dir
// if the path tries to go above the root, `up` ends up > 0
let up = 0;
for (let i = srcPath.length - 1; i >= 0; i--) {
last = srcPath[i];
if (last === '.') {
spliceOne(srcPath, i);
} else if (last === '..') {
spliceOne(srcPath, i);
up++;
} else if (up) {
spliceOne(srcPath, i);
up--;
}
}
// If the path is allowed to go above the root, restore leading ..s
if (!mustEndAbs && !removeAllDots) {
while (up--) {
srcPath.unshift('..');
}
}
if (mustEndAbs && srcPath[0] !== '' &&
(!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
srcPath.unshift('');
}
if (hasTrailingSlash && (srcPath.join('/').slice(-1) !== '/')) {
srcPath.push('');
}
const isAbsolute = srcPath[0] === '' ||
(srcPath[0] && srcPath[0].charAt(0) === '/');
// put the host back
if (noLeadingSlashes) {
result.hostname =
result.host = isAbsolute ? '' : srcPath.length ? srcPath.shift() : '';
// Occasionally the auth can get stuck only in host.
// This especially happens in cases like
// url.resolveObject('mailto:local1@domain1', 'local2@domain2')
const authInHost = result.host && result.host.indexOf('@') > 0 ?
result.host.split('@') : false;
if (authInHost) {
result.auth = authInHost.shift();
result.host = result.hostname = authInHost.shift();
}
}
mustEndAbs ||= (result.host && srcPath.length);
if (mustEndAbs && !isAbsolute) {
srcPath.unshift('');
}
if (!srcPath.length) {
result.pathname = null;
result.path = null;
} else {
result.pathname = srcPath.join('/');
}
// To support request.http
if (result.pathname !== null || result.search !== null) {
result.path = (result.pathname ? result.pathname : '') +
(result.search ? result.search : '');
}
result.auth = relative.auth || result.auth;
result.slashes ||= relative.slashes;
result.href = result.format();
return result;
};