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net: type check createServer options object #2904

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net: type check createServer options object #2904

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net: type check createServer options object
sam-github Sep 14, 2015
4c30369
fixup! net: type check createServer options object
sam-github Sep 16, 2015
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4 changes: 3 additions & 1 deletion lib/net.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1080,12 +1080,14 @@ function Server(options, connectionListener) {
connectionListener = options;
options = {};
self.on('connection', connectionListener);
} else {
} else if(options == null || typeof options === 'object') {
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Space between if and (

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Nit: typeof null returns 'object' so you can skip the check for options == null unless the intention is for the not-strict equality to allow undefined, in which case I imagine checking for undefined would be more clear. Meh, maybe not so much. == null is pretty idiomatic for "null or undefined".

options = options || {};

if (typeof connectionListener === 'function') {
self.on('connection', connectionListener);
}
} else {
throw new TypeError('options must be an object');
}

this._connections = 0;
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7 changes: 7 additions & 0 deletions test/parallel/test-net-server-options.js
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@@ -0,0 +1,7 @@
'use strict';
const common = require('../common');
const assert = require('assert');
const net = require('net');

assert.throws(function() { net.createServer('path'); }, TypeError);
assert.throws(function() { net.createServer(common.PORT); }, TypeError);