d9b8758f47
PR-URL: https://github.com/nodejs/node/pull/6132 Reviewed-By: Brian White <mscdex@mscdex.net> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: thefourtheye <thechargingvolcano@gmail.com>
59 lines
1.6 KiB
JavaScript
59 lines
1.6 KiB
JavaScript
/**
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* @fileoverview Rule to forbid control charactes from regular expressions.
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* @author Nicholas C. Zakas
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = function(context) {
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/**
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* Get the regex expression
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* @param {ASTNode} node node to evaluate
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* @returns {*} Regex if found else null
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* @private
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*/
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function getRegExp(node) {
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if (node.value instanceof RegExp) {
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return node.value;
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} else if (typeof node.value === "string") {
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var parent = context.getAncestors().pop();
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if ((parent.type === "NewExpression" || parent.type === "CallExpression") &&
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parent.callee.type === "Identifier" && parent.callee.name === "RegExp"
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) {
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// there could be an invalid regular expression string
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try {
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return new RegExp(node.value);
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} catch (ex) {
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return null;
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}
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}
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}
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return null;
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}
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return {
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"Literal": function(node) {
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var computedValue,
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regex = getRegExp(node);
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if (regex) {
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computedValue = regex.toString();
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if (/[\x00-\x1f]/.test(computedValue)) {
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context.report(node, "Unexpected control character in regular expression.");
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}
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}
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}
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};
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};
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module.exports.schema = [];
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