blob: 7a0dda43c36d9998b2bd6c13cbeecf67af9e1e3e (
plain)
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
|
'use strict'
/**
* Module dependencies.
*/
const bytes = require('bytes')
const contentType = require('content-type')
const typeis = require('type-is')
/**
* Module exports.
*/
module.exports = {
getCharset,
normalizeOptions,
passthrough
}
/**
* Get the charset of a request.
*
* @param {Object} req
* @returns {string | undefined}
* @private
*/
function getCharset (req) {
const header = req.headers['content-type']
if (!header) return undefined
return contentType.parse(header).parameters.charset?.toLowerCase()
}
/**
* Get the simple type checker.
*
* @param {string | string[]} type
* @returns {Function}
* @private
*/
function typeChecker (type) {
return function checkType (req) {
return Boolean(typeis(req, type))
}
}
/**
* Normalizes the common options for all parsers.
*
* @param {Object} options options to normalize
* @param {string | string[] | Function} defaultType default content type(s) or a function to determine it
* @returns {Object}
* @private
*/
function normalizeOptions (options, defaultType) {
if (!defaultType) {
// Parsers must define a default content type
throw new TypeError('defaultType must be provided')
}
const inflate = options?.inflate !== false
const limit = typeof options?.limit === 'undefined' || options?.limit === null
? 102400 // 100kb default
: bytes.parse(options.limit)
const type = options?.type || defaultType
const verify = options?.verify || false
const defaultCharset = options?.defaultCharset || 'utf-8'
if (limit === null) {
throw new TypeError(`option limit "${String(options.limit)}" is invalid`)
}
if (verify !== false && typeof verify !== 'function') {
throw new TypeError('option verify must be function')
}
// create the appropriate type checking function
const shouldParse = typeof type !== 'function'
? typeChecker(type)
: type
return {
inflate,
limit,
verify,
defaultCharset,
shouldParse
}
}
/**
* Passthrough function that returns input unchanged.
* Used by parsers that don't need to transform the data.
*
* @param {*} value
* @returns {*}
* @private
*/
function passthrough (value) {
return value
}
|
