mirror of https://github.com/gchq/CyberChef.git
98 lines
2.6 KiB
JavaScript
98 lines
2.6 KiB
JavaScript
/**
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*/
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import Operation from "../Operation.mjs";
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/**
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* URL Encode operation
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*/
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class URLEncode extends Operation {
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/**
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* URLEncode constructor
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*/
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constructor() {
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super();
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this.name = "URL Encode";
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this.module = "URL";
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this.description = "Encodes problematic characters into percent-encoding, a format supported by URIs/URLs.<br><br>e.g. <code>=</code> becomes <code>%3d</code>";
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this.infoURL = "https://wikipedia.org/wiki/Percent-encoding";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [
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{
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"name": "Encode all special chars",
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"type": "boolean",
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"value": false
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},
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{
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"name": "Encode all chars",
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"type": "boolean",
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"value": false
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},
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];
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}
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/**
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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const encodeSpecial = args[0];
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const encodeAll = args[1];
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return encodeAll ? this.encodeAllChars(input) : encodeSpecial ? this.encodeAllSpecialChars(input) : encodeURI(input);
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}
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/**
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* Pads a string from the front to a given length with a given char
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*
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* @param {string} str
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* @returns {string}
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*/
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frontPad (str, length, char) {
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return str.length >= length ? str : (char * (length - str.length)) + str;
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}
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/**
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* Encode characters in URL outside of encodeURI() function spec
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*
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* @param {string} str
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* @returns {string}
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*/
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encodeAllSpecialChars (str) {
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const SPECIAL_CHARS = "!#'()*-._~";
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let encoded = "";
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for (const char of str) {
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if (encodeURIComponent(char) === char && SPECIAL_CHARS.includes(char)) {
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encoded += "%" + this.frontPad(char.charCodeAt(0).toString(16).toUpperCase(), 2, "0");
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} else {
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encoded += encodeURIComponent(char);
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}
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}
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return encoded;
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}
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/**
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* Encode ALL characters in URL including alphanumeric based on char codes
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*
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* @param {string} str
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* @returns {string}
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*/
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encodeAllChars (str) {
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let encoded = "";
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for (const char of str) {
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encoded += "%" + this.frontPad(char.charCodeAt(0).toString(16).toUpperCase(), 2, "0");
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}
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return encoded;
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}
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}
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export default URLEncode;
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