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'use strict';
var required = require('requires-port')
, qs = require('querystringify')
, slashes = /^[A-Za-z][A-Za-z0-9+-.]*:\/\//
, protocolre = /^([a-z][a-z0-9.+-]*:)?(\/\/)?([\S\s]*)/i
, whitespace = '[\\x09\\x0A\\x0B\\x0C\\x0D\\x20\\xA0\\u1680\\u180E\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200A\\u202F\\u205F\\u3000\\u2028\\u2029\\uFEFF]'
, left = new RegExp('^'+ whitespace +'+');
/**
* Trim a given string.
*
* @param {String} str String to trim.
* @public
*/
function trimLeft(str) {
return (str ? str : '').toString().replace(left, '');
}
/**
* These are the parse rules for the URL parser, it informs the parser
* about:
*
* 0. The char it Needs to parse, if it's a string it should be done using
* indexOf, RegExp using exec and NaN means set as current value.
* 1. The property we should set when parsing this value.
* 2. Indication if it's backwards or forward parsing, when set as number it's
* the value of extra chars that should be split off.
* 3. Inherit from location if non existing in the parser.
* 4. `toLowerCase` the resulting value.
*/
var rules = [
['#', 'hash'], // Extract from the back.
['?', 'query'], // Extract from the back.
function sanitize(address) { // Sanitize what is left of the address
return address.replace('\\', '/');
},
['/', 'pathname'], // Extract from the back.
['@', 'auth', 1], // Extract from the front.
[NaN, 'host', undefined, 1, 1], // Set left over value.
[/:(\d+)$/, 'port', undefined, 1], // RegExp the back.
[NaN, 'hostname', undefined, 1, 1] // Set left over.
];
/**
* These properties should not be copied or inherited from. This is only needed
* for all non blob URL's as a blob URL does not include a hash, only the
* origin.
*
* @type {Object}
* @private
*/
var ignore = { hash: 1, query: 1 };
/**
* The location object differs when your code is loaded through a normal page,
* Worker or through a worker using a blob. And with the blobble begins the
* trouble as the location object will contain the URL of the blob, not the
* location of the page where our code is loaded in. The actual origin is
* encoded in the `pathname` so we can thankfully generate a good "default"
* location from it so we can generate proper relative URL's again.
*
* @param {Object|String} loc Optional default location object.
* @returns {Object} lolcation object.
* @public
*/
function lolcation(loc) {
var globalVar;
if (typeof window !== 'undefined') globalVar = window;
else if (typeof global !== 'undefined') globalVar = global;
else if (typeof self !== 'undefined') globalVar = self;
else globalVar = {};
var location = globalVar.location || {};
loc = loc || location;
var finaldestination = {}
, type = typeof loc
, key;
if ('blob:' === loc.protocol) {
finaldestination = new Url(unescape(loc.pathname), {});
} else if ('string' === type) {
finaldestination = new Url(loc, {});
for (key in ignore) delete finaldestination[key];
} else if ('object' === type) {
for (key in loc) {
if (key in ignore) continue;
finaldestination[key] = loc[key];
}
if (finaldestination.slashes === undefined) {
finaldestination.slashes = slashes.test(loc.href);
}
}
return finaldestination;
}
/**
* @typedef ProtocolExtract
* @type Object
* @property {String} protocol Protocol matched in the URL, in lowercase.
* @property {Boolean} slashes `true` if protocol is followed by "//", else `false`.
* @property {String} rest Rest of the URL that is not part of the protocol.
*/
/**
* Extract protocol information from a URL with/without double slash ("//").
*
* @param {String} address URL we want to extract from.
* @return {ProtocolExtract} Extracted information.
* @private
*/
function extractProtocol(address) {
address = trimLeft(address);
var match = protocolre.exec(address);
return {
protocol: match[1] ? match[1].toLowerCase() : '',
slashes: !!match[2],
rest: match[3]
};
}
/**
* Resolve a relative URL pathname against a base URL pathname.
*
* @param {String} relative Pathname of the relative URL.
* @param {String} base Pathname of the base URL.
* @return {String} Resolved pathname.
* @private
*/
function resolve(relative, base) {
if (relative === '') return base;
var path = (base || '/').split('/').slice(0, -1).concat(relative.split('/'))
, i = path.length
, last = path[i - 1]
, unshift = false
, up = 0;
while (i--) {
if (path[i] === '.') {
path.splice(i, 1);
} else if (path[i] === '..') {
path.splice(i, 1);
up++;
} else if (up) {
if (i === 0) unshift = true;
path.splice(i, 1);
up--;
}
}
if (unshift) path.unshift('');
if (last === '.' || last === '..') path.push('');
return path.join('/');
}
/**
* The actual URL instance. Instead of returning an object we've opted-in to
* create an actual constructor as it's much more memory efficient and
* faster and it pleases my OCD.
*
* It is worth noting that we should not use `URL` as class name to prevent
* clashes with the global URL instance that got introduced in browsers.
*
* @constructor
* @param {String} address URL we want to parse.
* @param {Object|String} [location] Location defaults for relative paths.
* @param {Boolean|Function} [parser] Parser for the query string.
* @private
*/
function Url(address, location, parser) {
address = trimLeft(address);
if (!(this instanceof Url)) {
return new Url(address, location, parser);
}
var relative, extracted, parse, instruction, index, key
, instructions = rules.slice()
, type = typeof location
, url = this
, i = 0;
//
// The following if statements allows this module two have compatibility with
// 2 different API:
//
// 1. Node.js's `url.parse` api which accepts a URL, boolean as arguments
// where the boolean indicates that the query string should also be parsed.
//
// 2. The `URL` interface of the browser which accepts a URL, object as
// arguments. The supplied object will be used as default values / fall-back
// for relative paths.
//
if ('object' !== type && 'string' !== type) {
parser = location;
location = null;
}
if (parser && 'function' !== typeof parser) parser = qs.parse;
location = lolcation(location);
//
// Extract protocol information before running the instructions.
//
extracted = extractProtocol(address || '');
relative = !extracted.protocol && !extracted.slashes;
url.slashes = extracted.slashes || relative && location.slashes;
url.protocol = extracted.protocol || location.protocol || '';
address = extracted.rest;
//
// When the authority component is absent the URL starts with a path
// component.
//
if (!extracted.slashes) instructions[3] = [/(.*)/, 'pathname'];
for (; i < instructions.length; i++) {
instruction = instructions[i];
if (typeof instruction === 'function') {
address = instruction(address);
continue;
}
parse = instruction[0];
key = instruction[1];
if (parse !== parse) {
url[key] = address;
} else if ('string' === typeof parse) {
if (~(index = address.indexOf(parse))) {
if ('number' === typeof instruction[2]) {
url[key] = address.slice(0, index);
address = address.slice(index + instruction[2]);
} else {
url[key] = address.slice(index);
address = address.slice(0, index);
}
}
} else if ((index = parse.exec(address))) {
url[key] = index[1];
address = address.slice(0, index.index);
}
url[key] = url[key] || (
relative && instruction[3] ? location[key] || '' : ''
);
//
// Hostname, host and protocol should be lowercased so they can be used to
// create a proper `origin`.
//
if (instruction[4]) url[key] = url[key].toLowerCase();
}
//
// Also parse the supplied query string in to an object. If we're supplied
// with a custom parser as function use that instead of the default build-in
// parser.
//
if (parser) url.query = parser(url.query);
//
// If the URL is relative, resolve the pathname against the base URL.
//
if (
relative
&& location.slashes
&& url.pathname.charAt(0) !== '/'
&& (url.pathname !== '' || location.pathname !== '')
) {
url.pathname = resolve(url.pathname, location.pathname);
}
//
// We should not add port numbers if they are already the default port number
// for a given protocol. As the host also contains the port number we're going
// override it with the hostname which contains no port number.
//
if (!required(url.port, url.protocol)) {
url.host = url.hostname;
url.port = '';
}
//
// Parse down the `auth` for the username and password.
//
url.username = url.password = '';
if (url.auth) {
instruction = url.auth.split(':');
url.username = instruction[0] || '';
url.password = instruction[1] || '';
}
url.origin = url.protocol && url.host && url.protocol !== 'file:'
? url.protocol +'//'+ url.host
: 'null';
//
// The href is just the compiled result.
//
url.href = url.toString();
}
/**
* This is convenience method for changing properties in the URL instance to
* insure that they all propagate correctly.
*
* @param {String} part Property we need to adjust.
* @param {Mixed} value The newly assigned value.
* @param {Boolean|Function} fn When setting the query, it will be the function
* used to parse the query.
* When setting the protocol, double slash will be
* removed from the final url if it is true.
* @returns {URL} URL instance for chaining.
* @public
*/
function set(part, value, fn) {
var url = this;
switch (part) {
case 'query':
if ('string' === typeof value && value.length) {
value = (fn || qs.parse)(value);
}
url[part] = value;
break;
case 'port':
url[part] = value;
if (!required(value, url.protocol)) {
url.host = url.hostname;
url[part] = '';
} else if (value) {
url.host = url.hostname +':'+ value;
}
break;
case 'hostname':
url[part] = value;
if (url.port) value += ':'+ url.port;
url.host = value;
break;
case 'host':
url[part] = value;
if (/:\d+$/.test(value)) {
value = value.split(':');
url.port = value.pop();
url.hostname = value.join(':');
} else {
url.hostname = value;
url.port = '';
}
break;
case 'protocol':
url.protocol = value.toLowerCase();
url.slashes = !fn;
break;
case 'pathname':
case 'hash':
if (value) {
var char = part === 'pathname' ? '/' : '#';
url[part] = value.charAt(0) !== char ? char + value : value;
} else {
url[part] = value;
}
break;
default:
url[part] = value;
}
for (var i = 0; i < rules.length; i++) {
var ins = rules[i];
if (ins[4]) url[ins[1]] = url[ins[1]].toLowerCase();
}
url.origin = url.protocol && url.host && url.protocol !== 'file:'
? url.protocol +'//'+ url.host
: 'null';
url.href = url.toString();
return url;
}
/**
* Transform the properties back in to a valid and full URL string.
*
* @param {Function} stringify Optional query stringify function.
* @returns {String} Compiled version of the URL.
* @public
*/
function toString(stringify) {
if (!stringify || 'function' !== typeof stringify) stringify = qs.stringify;
var query
, url = this
, protocol = url.protocol;
if (protocol && protocol.charAt(protocol.length - 1) !== ':') protocol += ':';
var result = protocol + (url.slashes ? '//' : '');
if (url.username) {
result += url.username;
if (url.password) result += ':'+ url.password;
result += '@';
}
result += url.host + url.pathname;
query = 'object' === typeof url.query ? stringify(url.query) : url.query;
if (query) result += '?' !== query.charAt(0) ? '?'+ query : query;
if (url.hash) result += url.hash;
return result;
}
Url.prototype = { set: set, toString: toString };
//
// Expose the URL parser and some additional properties that might be useful for
// others or testing.
//
Url.extractProtocol = extractProtocol;
Url.location = lolcation;
Url.trimLeft = trimLeft;
Url.qs = qs;
module.exports = Url;
| .. | |||||
| dist | |||||
| LICENSE | |||||
| README.md | |||||
| index.js | |||||
| package.json |