source: trip-planner-front/node_modules/minipass-sized/index.js

Last change on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 1.7 KB
Line 
1const Minipass = require('minipass')
2
3class SizeError extends Error {
4 constructor (found, expect) {
5 super(`Bad data size: expected ${expect} bytes, but got ${found}`)
6 this.expect = expect
7 this.found = found
8 this.code = 'EBADSIZE'
9 Error.captureStackTrace(this, this.constructor)
10 }
11 get name () {
12 return 'SizeError'
13 }
14}
15
16class MinipassSized extends Minipass {
17 constructor (options = {}) {
18 super(options)
19
20 if (options.objectMode)
21 throw new TypeError(`${
22 this.constructor.name
23 } streams only work with string and buffer data`)
24
25 this.found = 0
26 this.expect = options.size
27 if (typeof this.expect !== 'number' ||
28 this.expect > Number.MAX_SAFE_INTEGER ||
29 isNaN(this.expect) ||
30 this.expect < 0 ||
31 !isFinite(this.expect) ||
32 this.expect !== Math.floor(this.expect))
33 throw new Error('invalid expected size: ' + this.expect)
34 }
35
36 write (chunk, encoding, cb) {
37 const buffer = Buffer.isBuffer(chunk) ? chunk
38 : typeof chunk === 'string' ?
39 Buffer.from(chunk, typeof encoding === 'string' ? encoding : 'utf8')
40 : chunk
41
42 if (!Buffer.isBuffer(buffer)) {
43 this.emit('error', new TypeError(`${
44 this.constructor.name
45 } streams only work with string and buffer data`))
46 return false
47 }
48
49 this.found += buffer.length
50 if (this.found > this.expect)
51 this.emit('error', new SizeError(this.found, this.expect))
52
53 return super.write(chunk, encoding, cb)
54 }
55
56 emit (ev, ...data) {
57 if (ev === 'end') {
58 if (this.found !== this.expect)
59 this.emit('error', new SizeError(this.found, this.expect))
60 }
61 return super.emit(ev, ...data)
62 }
63}
64
65MinipassSized.SizeError = SizeError
66
67module.exports = MinipassSized
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