bc518174
 王天杨
提交两个项目文件
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Ivan Kopeykin @vankop
*/
"use strict";
const memorize = require("./memoize");
const getUrl = memorize(() => require("url"));
const PATH_QUERY_FRAGMENT_REGEXP =
/^(#?(?:\0.|[^?#\0])*)(\?(?:\0.|[^#\0])*)?(#.*)?$/;
const ZERO_ESCAPE_REGEXP = /\0(.)/g;
const FILE_REG_EXP = /file:/i;
/**
* @param {string} identifier identifier
* @returns {[string, string, string] | null} parsed identifier
*/
function parseIdentifier(identifier) {
if (!identifier) {
return null;
}
if (FILE_REG_EXP.test(identifier)) {
identifier = getUrl().fileURLToPath(identifier);
}
const firstEscape = identifier.indexOf("\0");
// Handle `\0`
if (firstEscape !== -1) {
const match = PATH_QUERY_FRAGMENT_REGEXP.exec(identifier);
if (!match) return null;
return [
match[1].replace(ZERO_ESCAPE_REGEXP, "$1"),
match[2] ? match[2].replace(ZERO_ESCAPE_REGEXP, "$1") : "",
match[3] || "",
];
}
// Fast path for inputs that don't use \0 escaping.
const queryStart = identifier.indexOf("?");
// Start at index 1 to ignore a possible leading hash.
const fragmentStart = identifier.indexOf("#", 1);
if (fragmentStart < 0) {
if (queryStart < 0) {
// No fragment, no query
return [identifier, "", ""];
}
// Query, no fragment
return [identifier.slice(0, queryStart), identifier.slice(queryStart), ""];
}
if (queryStart < 0 || fragmentStart < queryStart) {
// Fragment, no query
return [
identifier.slice(0, fragmentStart),
"",
identifier.slice(fragmentStart),
];
}
// Query and fragment
return [
identifier.slice(0, queryStart),
identifier.slice(queryStart, fragmentStart),
identifier.slice(fragmentStart),
];
}
module.exports.parseIdentifier = parseIdentifier;
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