1  // Copyright Joyent, Inc. and other Node contributors.
 2  //
 3  // Permission is hereby granted, free of charge, to any person obtaining a
 4  // copy of this software and associated documentation files (the
 5  // "Software"), to deal in the Software without restriction, including
 6  // without limitation the rights to use, copy, modify, merge, publish,
 7  // distribute, sublicense, and/or sell copies of the Software, and to permit
 8  // persons to whom the Software is furnished to do so, subject to the
 9  // following conditions:
10  //
11  // The above copyright notice and this permission notice shall be included
12  // in all copies or substantial portions of the Software.
13  //
14  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16  // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17  // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20  // USE OR OTHER DEALINGS IN THE SOFTWARE.
21  
22  'use strict';
23  
24  var stringifyPrimitive = function(v) {
25    switch (typeof v) {
26      case 'string':
27        return v;
28  
29      case 'boolean':
30        return v ? 'true' : 'false';
31  
32      case 'number':
33        return isFinite(v) ? v : '';
34  
35      default:
36        return '';
37    }
38  };
39  
40  module.exports = function(obj, sep, eq, name) {
41    sep = sep || '&';
42    eq = eq || '=';
43    if (obj === null) {
44      obj = undefined;
45    }
46  
47    if (typeof obj === 'object') {
48      return Object.keys(obj).map(function(k) {
49        var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
50        if (Array.isArray(obj[k])) {
51          return obj[k].map(function(v) {
52            return ks + encodeURIComponent(stringifyPrimitive(v));
53          }).join(sep);
54        } else {
55          return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
56        }
57      }).join(sep);
58  
59    }
60  
61    if (!name) return '';
62    return encodeURIComponent(stringifyPrimitive(name)) + eq +
63           encodeURIComponent(stringifyPrimitive(obj));
64  };