107 lines
3.1 KiB
JavaScript
107 lines
3.1 KiB
JavaScript
|
/**
|
||
|
|
* @fileoverview Validate strings passed to the RegExp constructor
|
||
|
|
* @author Michael Ficarra
|
||
|
|
*/
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Requirements
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
const espree = require("espree");
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// Rule Definition
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
meta: {
|
||
|
|
docs: {
|
||
|
|
description: "disallow invalid regular expression strings in `RegExp` constructors",
|
||
|
|
category: "Possible Errors",
|
||
|
|
recommended: true
|
||
|
|
},
|
||
|
|
|
||
|
|
schema: [{
|
||
|
|
type: "object",
|
||
|
|
properties: {
|
||
|
|
allowConstructorFlags: {
|
||
|
|
type: "array",
|
||
|
|
items: {
|
||
|
|
type: "string"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
},
|
||
|
|
additionalProperties: false
|
||
|
|
}]
|
||
|
|
},
|
||
|
|
|
||
|
|
create(context) {
|
||
|
|
|
||
|
|
const options = context.options[0];
|
||
|
|
let allowedFlags = "";
|
||
|
|
|
||
|
|
if (options && options.allowConstructorFlags) {
|
||
|
|
allowedFlags = options.allowConstructorFlags.join("");
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check if node is a string
|
||
|
|
* @param {ASTNode} node node to evaluate
|
||
|
|
* @returns {boolean} True if its a string
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function isString(node) {
|
||
|
|
return node && node.type === "Literal" && typeof node.value === "string";
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Validate strings passed to the RegExp constructor
|
||
|
|
* @param {ASTNode} node node to evaluate
|
||
|
|
* @returns {void}
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function check(node) {
|
||
|
|
if (node.callee.type === "Identifier" && node.callee.name === "RegExp" && isString(node.arguments[0])) {
|
||
|
|
let flags = isString(node.arguments[1]) ? node.arguments[1].value : "";
|
||
|
|
|
||
|
|
if (allowedFlags) {
|
||
|
|
flags = flags.replace(new RegExp(`[${allowedFlags}]`, "gi"), "");
|
||
|
|
}
|
||
|
|
|
||
|
|
try {
|
||
|
|
void new RegExp(node.arguments[0].value);
|
||
|
|
} catch (e) {
|
||
|
|
context.report({
|
||
|
|
node,
|
||
|
|
message: "{{message}}.",
|
||
|
|
data: e
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
if (flags) {
|
||
|
|
|
||
|
|
try {
|
||
|
|
espree.parse(`/./${flags}`, context.parserOptions);
|
||
|
|
} catch (ex) {
|
||
|
|
context.report({
|
||
|
|
node,
|
||
|
|
message: "Invalid flags supplied to RegExp constructor '{{flags}}'.",
|
||
|
|
data: {
|
||
|
|
flags
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
CallExpression: check,
|
||
|
|
NewExpression: check
|
||
|
|
};
|
||
|
|
|
||
|
|
}
|
||
|
|
};
|