You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
1.9 KiB
64 lines
1.9 KiB
'use strict';
|
|
|
|
const Assert = require('@hapi/hoek/lib/assert');
|
|
|
|
const Uri = require('./uri');
|
|
|
|
|
|
const internals = {};
|
|
|
|
|
|
exports.regex = function (options = {}) {
|
|
|
|
// CIDR
|
|
|
|
Assert(options.cidr === undefined || typeof options.cidr === 'string', 'options.cidr must be a string');
|
|
const cidr = options.cidr ? options.cidr.toLowerCase() : 'optional';
|
|
Assert(['required', 'optional', 'forbidden'].includes(cidr), 'options.cidr must be one of required, optional, forbidden');
|
|
|
|
// Versions
|
|
|
|
Assert(options.version === undefined || typeof options.version === 'string' || Array.isArray(options.version), 'options.version must be a string or an array of string');
|
|
let versions = options.version || ['ipv4', 'ipv6', 'ipvfuture'];
|
|
if (!Array.isArray(versions)) {
|
|
versions = [versions];
|
|
}
|
|
|
|
Assert(versions.length >= 1, 'options.version must have at least 1 version specified');
|
|
|
|
for (let i = 0; i < versions.length; ++i) {
|
|
Assert(typeof versions[i] === 'string', 'options.version must only contain strings');
|
|
versions[i] = versions[i].toLowerCase();
|
|
Assert(['ipv4', 'ipv6', 'ipvfuture'].includes(versions[i]), 'options.version contains unknown version ' + versions[i] + ' - must be one of ipv4, ipv6, ipvfuture');
|
|
}
|
|
|
|
versions = Array.from(new Set(versions));
|
|
|
|
// Regex
|
|
|
|
const parts = versions.map((version) => {
|
|
|
|
// Forbidden
|
|
|
|
if (cidr === 'forbidden') {
|
|
return Uri.ip[version];
|
|
}
|
|
|
|
// Required
|
|
|
|
const cidrpart = `\\/${version === 'ipv4' ? Uri.ip.v4Cidr : Uri.ip.v6Cidr}`;
|
|
|
|
if (cidr === 'required') {
|
|
return `${Uri.ip[version]}${cidrpart}`;
|
|
}
|
|
|
|
// Optional
|
|
|
|
return `${Uri.ip[version]}(?:${cidrpart})?`;
|
|
});
|
|
|
|
const raw = `(?:${parts.join('|')})`;
|
|
const regex = new RegExp(`^${raw}$`);
|
|
return { cidr, versions, regex, raw };
|
|
};
|