all files / lib/ body.es6

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
 
 
 
 
 
 
 
 
 
 
6×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1×
 
 
 
 
11×
 
 
 
2×
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
import FormData from 'isomorphic-form-data';
import { default as _ } from 'lodash';
import { Promise } from 'es6-promise';
 
/**
 @module body
 */
 
const consumed = (body) => {
 
  if (body.bodyUsed)
    return Promise.reject(new TypeError('Already read'));
 
  body.bodyUsed = true;
 
};
 
/**
 * [Body mixin](https://fetch.spec.whatwg.org/#body-mixin) representing the body of a request or response. A body can be used through one of the class methods after which is can not be used again.
 * @alias module:body
 */
class Body {
  /**
   * @param {(String|FormData)} [body='']
   * @returns {Object} Body instance
   */
  constructor(body = '') {
 
    this._bodyInit = body;
    this.bodyUsed = false;
 
    if (_.isString(body)) {
 
      this._bodyText = body;
 
    } else if (body instanceof FormData) {
 
      this._bodyFormData = body;
 
    } else {
 
      throw new Error('unsupported body type');
 
    }
 
  }
 
  /**
   * Uses body and returns a Promise that resolves the body.
   * @returns {Promise.<String>}
   */
  text() {
 
    const rejected = consumed(this);
 
    return rejected ? rejected : Promise.resolve(this._bodyText)
 
  }
 
  /**
   * Uses body and returns a Promise that resolves a parsed JSON object from the body.
   * @returns {Promise.<Object>}
   */
  json() {
 
    return this.text()
      .then(JSON.parse)
 
  }
 
  /**
   * Uses body and returns a Promise that resolves an instance of FormData.
   * @returns {Promise.<FormData>}
   */
  formData() {
 
    return this.text()
      .then((body) => {
 
        const form = new FormData();
        const pairs = body.trim().replace(/\+/g, '').split('&');
 
        _.forEach(pairs, (pair) => form.append(..._(pair)
            .thru(decodeURIComponent)
            .split('=')
            .value()));
 
        return form;
 
      });
 
  }
 
  /**
   * Uses body and returns a Promise that resolves a Blob. Note this is not implemented yet.
   * @ignore
   * @returns {Promise.<Blob>}
   */
  blob() {
 
    return Promise.reject(new Error('Method has not been implemented by farfetchd yet'));
 
  }
 
  /**
   * Uses body and returns a Promise that resolves an ArrayBuffer. Note this is not implemented yet.
   * @ignore
   * @returns {Promise.<ArrayBuffer>}
   */
  arrayBuffer() {
 
    return Promise.reject(new Error('Method has not been implemented by farfetchd yet'));
 
  }
 
}
 
export default Body;