4 * Copyright(c) 2011 TJ Holowaychuk
9 * Limit request bodies to the given size in `bytes`.
11 * A string representation of the bytesize may also be passed,
12 * for example "5mb", "200kb", "1gb", etc.
16 * var server = connect(
17 * connect.limit('5.5mb')
22 * @param {Number|String} bytes
27 module.exports = function limit(bytes){
28 if ('string' == typeof bytes) bytes = parse(bytes);
29 if ('number' != typeof bytes) throw new Error('limit() bytes required');
30 return function limit(req, res, next){
32 , len = req.headers['content-length']
33 ? parseInt(req.headers['content-length'], 10)
42 if (req._limit) return next();
45 // limit by content-length
46 if (len && len > bytes) deny();
49 req.on('data', function(chunk){
50 received += chunk.length;
51 if (received > bytes) deny();
59 * Parse byte `size` string.
61 * @param {String} size
66 function parse(size) {
67 var parts = size.match(/^(\d+(?:\.\d+)?) *(kb|mb|gb)$/)
68 , n = parseFloat(parts[1])
74 , gb: 1024 * 1024 * 1024