1 | var makeMiddleware = require('./lib/make-middleware')
|
2 |
|
3 | var diskStorage = require('./storage/disk')
|
4 | var memoryStorage = require('./storage/memory')
|
5 | var MulterError = require('./lib/multer-error')
|
6 |
|
7 | function allowAll (req, file, cb) {
|
8 | cb(null, true)
|
9 | }
|
10 |
|
11 | function Multer (options) {
|
12 | if (options.storage) {
|
13 | this.storage = options.storage
|
14 | } else if (options.dest) {
|
15 | this.storage = diskStorage({ destination: options.dest })
|
16 | } else {
|
17 | this.storage = memoryStorage()
|
18 | }
|
19 |
|
20 | this.limits = options.limits
|
21 | this.preservePath = options.preservePath
|
22 | this.fileFilter = options.fileFilter || allowAll
|
23 | }
|
24 |
|
25 | Multer.prototype._makeMiddleware = function (fields, fileStrategy) {
|
26 | function setup () {
|
27 | var fileFilter = this.fileFilter
|
28 | var filesLeft = Object.create(null)
|
29 |
|
30 | fields.forEach(function (field) {
|
31 | if (typeof field.maxCount === 'number') {
|
32 | filesLeft[field.name] = field.maxCount
|
33 | } else {
|
34 | filesLeft[field.name] = Infinity
|
35 | }
|
36 | })
|
37 |
|
38 | function wrappedFileFilter (req, file, cb) {
|
39 | if ((filesLeft[file.fieldname] || 0) <= 0) {
|
40 | return cb(new MulterError('LIMIT_UNEXPECTED_FILE', file.fieldname))
|
41 | }
|
42 |
|
43 | filesLeft[file.fieldname] -= 1
|
44 | fileFilter(req, file, cb)
|
45 | }
|
46 |
|
47 | return {
|
48 | limits: this.limits,
|
49 | preservePath: this.preservePath,
|
50 | storage: this.storage,
|
51 | fileFilter: wrappedFileFilter,
|
52 | fileStrategy: fileStrategy
|
53 | }
|
54 | }
|
55 |
|
56 | return makeMiddleware(setup.bind(this))
|
57 | }
|
58 |
|
59 | Multer.prototype.single = function (name) {
|
60 | return this._makeMiddleware([{ name: name, maxCount: 1 }], 'VALUE')
|
61 | }
|
62 |
|
63 | Multer.prototype.array = function (name, maxCount) {
|
64 | return this._makeMiddleware([{ name: name, maxCount: maxCount }], 'ARRAY')
|
65 | }
|
66 |
|
67 | Multer.prototype.fields = function (fields) {
|
68 | return this._makeMiddleware(fields, 'OBJECT')
|
69 | }
|
70 |
|
71 | Multer.prototype.none = function () {
|
72 | return this._makeMiddleware([], 'NONE')
|
73 | }
|
74 |
|
75 | Multer.prototype.any = function () {
|
76 | function setup () {
|
77 | return {
|
78 | limits: this.limits,
|
79 | preservePath: this.preservePath,
|
80 | storage: this.storage,
|
81 | fileFilter: this.fileFilter,
|
82 | fileStrategy: 'ARRAY'
|
83 | }
|
84 | }
|
85 |
|
86 | return makeMiddleware(setup.bind(this))
|
87 | }
|
88 |
|
89 | function multer (options) {
|
90 | if (options === undefined) {
|
91 | return new Multer({})
|
92 | }
|
93 |
|
94 | if (typeof options === 'object' && options !== null) {
|
95 | return new Multer(options)
|
96 | }
|
97 |
|
98 | throw new TypeError('Expected object for argument options')
|
99 | }
|
100 |
|
101 | module.exports = multer
|
102 | module.exports.diskStorage = diskStorage
|
103 | module.exports.memoryStorage = memoryStorage
|
104 | module.exports.MulterError = MulterError
|