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/*!
* parseurl
* Copyright(c) 2014 Jonathan Ong
* Copyright(c) 2014-2017 Douglas Christopher Wilson
* MIT Licensed
*/
'use strict'
/**
* Module dependencies.
* @private
*/
var url = require('url')
var parse = url.parse
var Url = url.Url
/**
* Module exports.
* @public
*/
module.exports = parseurl
module.exports.original = originalurl
/**
* Parse the `req` url with memoization.
*
* @param {ServerRequest} req
* @return {Object}
* @public
*/
function parseurl (req) {
var url = req.url
if (url === undefined) {
// URL is undefined
return undefined
}
var parsed = req._parsedUrl
if (fresh(url, parsed)) {
// Return cached URL parse
return parsed
}
// Parse the URL
parsed = fastparse(url)
parsed._raw = url
return (req._parsedUrl = parsed)
};
/**
* Parse the `req` original url with fallback and memoization.
*
* @param {ServerRequest} req
* @return {Object}
* @public
*/
function originalurl (req) {
var url = req.originalUrl
if (typeof url !== 'string') {
// Fallback
return parseurl(req)
}
var parsed = req._parsedOriginalUrl
if (fresh(url, parsed)) {
// Return cached URL parse
return parsed
}
// Parse the URL
parsed = fastparse(url)
parsed._raw = url
return (req._parsedOriginalUrl = parsed)
};
/**
* Parse the `str` url with fast-path short-cut.
*
* @param {string} str
* @return {Object}
* @private
*/
function fastparse (str) {
if (typeof str !== 'string' || str.charCodeAt(0) !== 0x2f /* / */) {
return parse(str)
}
var pathname = str
var query = null
var search = null
// This takes the regexp from https://github.com/joyent/node/pull/7878
// Which is /^(\/[^?#\s]*)(\?[^#\s]*)?$/
// And unrolls it into a for loop
for (var i = 1; i < str.length; i++) {
switch (str.charCodeAt(i)) {
case 0x3f: /* ? */
if (search === null) {
pathname = str.substring(0, i)
query = str.substring(i + 1)
search = str.substring(i)
}
break
case 0x09: /* \t */
case 0x0a: /* \n */
case 0x0c: /* \f */
case 0x0d: /* \r */
case 0x20: /* */
case 0x23: /* # */
case 0xa0:
case 0xfeff:
return parse(str)
}
}
var url = Url !== undefined
? new Url()
: {}
url.path = str
url.href = str
url.pathname = pathname
if (search !== null) {
url.query = query
url.search = search
}
return url
}
/**
* Determine if parsed is still fresh for url.
*
* @param {string} url
* @param {object} parsedUrl
* @return {boolean}
* @private
*/
function fresh (url, parsedUrl) {
return typeof parsedUrl === 'object' &&
parsedUrl !== null &&
(Url === undefined || parsedUrl instanceof Url) &&
parsedUrl._raw === url
}
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