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'use strict'
const WritableStream = require('node:stream').Writable
const { inherits } = require('node:util')
const Dicer = require('../deps/dicer/lib/Dicer')
const MultipartParser = require('./types/multipart')
const UrlencodedParser = require('./types/urlencoded')
const parseParams = require('./utils/parseParams')
function Busboy (opts) {
if (!(this instanceof Busboy)) { return new Busboy(opts) }
if (typeof opts !== 'object') {
throw new TypeError('Busboy expected an options-Object.')
}
if (typeof opts.headers !== 'object') {
throw new TypeError('Busboy expected an options-Object with headers-attribute.')
}
if (typeof opts.headers['content-type'] !== 'string') {
throw new TypeError('Missing Content-Type-header.')
}
const {
headers,
...streamOptions
} = opts
this.opts = {
autoDestroy: false,
...streamOptions
}
WritableStream.call(this, this.opts)
this._done = false
this._parser = this.getParserByHeaders(headers)
this._finished = false
}
inherits(Busboy, WritableStream)
Busboy.prototype.emit = function (ev) {
if (ev === 'finish') {
if (!this._done) {
this._parser?.end()
return
} else if (this._finished) {
return
}
this._finished = true
}
WritableStream.prototype.emit.apply(this, arguments)
}
Busboy.prototype.getParserByHeaders = function (headers) {
const parsed = parseParams(headers['content-type'])
const cfg = {
defCharset: this.opts.defCharset,
fileHwm: this.opts.fileHwm,
headers,
highWaterMark: this.opts.highWaterMark,
isPartAFile: this.opts.isPartAFile,
limits: this.opts.limits,
parsedConType: parsed,
preservePath: this.opts.preservePath
}
if (MultipartParser.detect.test(parsed[0])) {
return new MultipartParser(this, cfg)
}
if (UrlencodedParser.detect.test(parsed[0])) {
return new UrlencodedParser(this, cfg)
}
throw new Error('Unsupported Content-Type.')
}
Busboy.prototype._write = function (chunk, encoding, cb) {
this._parser.write(chunk, cb)
}
module.exports = Busboy
module.exports.default = Busboy
module.exports.Busboy = Busboy
module.exports.Dicer = Dicer
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