1
 2/*!
 3 * Connect - urlencoded
 4 * Copyright(c) 2010 Sencha Inc.
 5 * Copyright(c) 2011 TJ Holowaychuk
 6 * MIT Licensed
 7 */
 8
 9/**
10 * Module dependencies.
11 */
12
13var utils = require('../utils')
14  , _limit = require('./limit')
15  , qs = require('qs');
16
17/**
18 * noop middleware.
19 */
20
21function noop(req, res, next) {
22  next();
23}
24
25/**
26 * Urlencoded:
27 * 
28 *  Parse x-ww-form-urlencoded request bodies,
29 *  providing the parsed object as `req.body`.
30 *
31 * Options:
32 *
33 *    - `limit`  byte limit disabled by default
34 *
35 * @param {Object} options
36 * @return {Function}
37 * @api public
38 */
39
40exports = module.exports = function(options){
41  options = options || {};
42
43  var limit = options.limit
44    ? _limit(options.limit)
45    : noop;
46
47  return function urlencoded(req, res, next) {
48    if (req._body) return next();
49    req.body = req.body || {};
50
51    if (!utils.hasBody(req)) return next();
52
53    // check Content-Type
54    if ('application/x-www-form-urlencoded' != utils.mime(req)) return next();
55
56    // flag as parsed
57    req._body = true;
58
59    // parse
60    limit(req, res, function(err){
61      if (err) return next(err);
62      var buf = '';
63      req.setEncoding('utf8');
64      req.on('data', function(chunk){ buf += chunk });
65      req.on('end', function(){
66        try {
67          req.body = buf.length
68            ? qs.parse(buf, options)
69            : {};
70          next();
71        } catch (err){
72          err.body = buf;
73          next(err);
74        }
75      });
76    });
77  }
78};