@toreda/strong-types
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Better TypeScript code in fewer lines.
62 lines (60 loc) • 2.37 kB
JavaScript
;
/**
* MIT License
*
* Copyright (c) 2019 - 2021 Toreda, Inc.
*
* 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.
*
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.isIpv4Addr = void 0;
function isIpv4Addr(addr) {
//Always a string.
if (typeof addr !== 'string') {
return false;
}
//Is valid if it has whitespace which can be trimmed with .trim()
//Invalid if it contains any other whitespace which cannot be trimmed with .trim()
const trimmed = addr.trim();
//Always has exactly four quads, and 3 periods.
const pieces = trimmed.split('.');
if (pieces.length !== 4) {
return false;
}
const firstQuad = parseInt(pieces[0]);
const secondQuad = parseInt(pieces[1]);
const thirdQuad = parseInt(pieces[2]);
const fourthQuad = parseInt(pieces[3]);
//The first quad must be an integer between 1 and 255 (cannot be 0)
//All other quads must be an integer between 0 and 255
//Integers cannot have leading 0s
if (firstQuad <= 0 || firstQuad > 255) {
return false;
}
if (secondQuad < 0 ||
secondQuad > 255 ||
thirdQuad < 0 ||
thirdQuad > 255 ||
fourthQuad < 0 ||
firstQuad > 255) {
return false;
}
return true;
}
exports.isIpv4Addr = isIpv4Addr;