125 lines
3.8 KiB
JavaScript
125 lines
3.8 KiB
JavaScript
// @ts-check
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const _ = require("lodash");
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/**
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* Sanitize SQL function
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* ==============================================================================
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* @description this function takes in a text(or number) and returns a sanitized
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* text, usually without spaces
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*
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* @param {any} text - Text or number or object
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* @param {boolean} [spaces] - Allow spaces
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* @param {RegExp?} [regex] - Regular expression, removes any match
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*
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* @returns {any}
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*/
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function sanitizeSql(text, spaces, regex) {
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if (!text) return "";
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if (typeof text == "number" || typeof text == "boolean") return text;
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if (typeof text == "string" && !text?.toString()?.match(/./)) return "";
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if (typeof text == "object" && !Array.isArray(text)) {
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const newObject = sanitizeObjects(text, spaces);
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return newObject;
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} else if (typeof text == "object" && Array.isArray(text)) {
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const newArray = sanitizeArrays(text, spaces);
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return newArray;
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}
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let finalText = text;
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if (regex) {
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finalText = text.toString().replace(regex, "");
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}
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if (spaces) {
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} else {
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finalText = text
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.toString()
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.replace(/\n|\r|\n\r|\r\n/g, "")
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.replace(/ /g, "");
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}
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const escapeRegex =
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/select |insert |drop |delete |alter |create |exec | union | or | like | concat|LOAD_FILE|ASCII| COLLATE | HAVING | information_schema|DECLARE |\#|WAITFOR |delay |BENCHMARK |\/\*.*\*\//gi;
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finalText = finalText
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.replace(/(?<!\\)\'/g, "\\'")
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.replace(/(?<!\\)\`/g, "\\`")
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.replace(/\/\*\*\//g, "")
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.replace(escapeRegex, "\\$&");
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return finalText;
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}
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/**
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* Sanitize Objects Function
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* ==============================================================================
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* @description Sanitize objects in the form { key: "value" }
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*
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* @param {any} object - Database Full Name
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* @param {boolean} [spaces] - Allow spaces
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*
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* @returns {object}
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*/
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function sanitizeObjects(object, spaces) {
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/** @type {any} */
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let objectUpdated = { ...object };
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const keys = Object.keys(objectUpdated);
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keys.forEach((key) => {
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const value = objectUpdated[key];
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if (!value) {
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delete objectUpdated[key];
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return;
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}
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if (typeof value == "string" || typeof value == "number") {
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objectUpdated[key] = sanitizeSql(value, spaces);
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} else if (typeof value == "object" && !Array.isArray(value)) {
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objectUpdated[key] = sanitizeObjects(value, spaces);
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} else if (typeof value == "object" && Array.isArray(value)) {
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objectUpdated[key] = sanitizeArrays(value, spaces);
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}
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});
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return objectUpdated;
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}
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/**
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* Sanitize Objects Function
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* ==============================================================================
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* @description Sanitize objects in the form { key: "value" }
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*
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* @param {any[]} array - Database Full Name
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* @param {boolean} [spaces] - Allow spaces
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*
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* @returns {string[]|number[]|object[]}
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*/
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function sanitizeArrays(array, spaces) {
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let arrayUpdated = _.cloneDeep(array);
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arrayUpdated.forEach((item, index) => {
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const value = item;
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if (!value) {
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arrayUpdated.splice(index, 1);
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return;
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}
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if (typeof item == "string" || typeof item == "number") {
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arrayUpdated[index] = sanitizeSql(value, spaces);
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} else if (typeof item == "object" && !Array.isArray(value)) {
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arrayUpdated[index] = sanitizeObjects(value, spaces);
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} else if (typeof item == "object" && Array.isArray(value)) {
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arrayUpdated[index] = sanitizeArrays(item, spaces);
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}
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});
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return arrayUpdated;
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}
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module.exports = sanitizeSql;
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