Adding upstream version 5.28.2+dfsg1+~cs23.11.12.3.upstream/5.28.2+dfsg1+_cs23.11.12.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 1171 insertions, 0 deletions

diff --git a/fastify-busboy/lib/main.d.ts b/fastify-busboy/lib/main.d.ts
new file mode 100644
index 0000000..91b6448
--- /dev/null
+++ b/fastify-busboy/lib/main.d.ts
@@ -0,0 +1,196 @@
+// Definitions by: Jacob Baskin <https://github.com/jacobbaskin>
+//                 BendingBender <https://github.com/BendingBender>
+//                 Igor Savin <https://github.com/kibertoad>
+
+/// <reference types="node" />
+
+import * as http from 'http';
+import { Readable, Writable } from 'stream';
+export { Dicer } from "../deps/dicer/lib/dicer";
+
+export const Busboy: BusboyConstructor;
+export default Busboy;
+
+export interface BusboyConfig {
+    /**
+     * These are the HTTP headers of the incoming request, which are used by individual parsers.
+     */
+    headers: BusboyHeaders;
+    /**
+     * `highWaterMark` to use for this Busboy instance.
+     * @default WritableStream default.
+     */
+    highWaterMark?: number | undefined;
+    /**
+     * highWaterMark to use for file streams.
+     * @default ReadableStream default.
+     */
+    fileHwm?: number | undefined;
+    /**
+     * Default character set to use when one isn't defined.
+     * @default 'utf8'
+     */
+    defCharset?: string | undefined;
+    /**
+     * Detect if a Part is a file.
+     * 
+     * By default a file is detected if contentType 
+     * is application/octet-stream or fileName is not
+     * undefined.
+     * 
+     * Modify this to handle e.g. Blobs.
+     */
+    isPartAFile?: (fieldName: string | undefined, contentType: string | undefined, fileName: string | undefined) => boolean;
+    /**
+     * If paths in the multipart 'filename' field shall be preserved.
+     * @default false
+     */
+    preservePath?: boolean | undefined;
+    /**
+     * Various limits on incoming data.
+     */
+    limits?:
+    | {
+        /**
+         * Max field name size (in bytes)
+         * @default 100 bytes
+         */
+        fieldNameSize?: number | undefined;
+        /**
+         * Max field value size (in bytes)
+         * @default 1MB
+         */
+        fieldSize?: number | undefined;
+        /**
+         * Max number of non-file fields
+         * @default Infinity
+         */
+        fields?: number | undefined;
+        /**
+         * For multipart forms, the max file size (in bytes)
+         * @default Infinity
+         */
+        fileSize?: number | undefined;
+        /**
+         * For multipart forms, the max number of file fields
+         * @default Infinity
+         */
+        files?: number | undefined;
+        /**
+         * For multipart forms, the max number of parts (fields + files)
+         * @default Infinity
+         */
+        parts?: number | undefined;
+        /**
+         * For multipart forms, the max number of header key=>value pairs to parse
+         * @default 2000
+         */
+        headerPairs?: number | undefined;
+
+        /**
+         * For multipart forms, the max size of a header part
+         * @default 81920
+         */
+        headerSize?: number | undefined;
+    }
+    | undefined;
+}
+
+export type BusboyHeaders = { 'content-type': string } & http.IncomingHttpHeaders;
+
+export interface BusboyFileStream extends
+    Readable {
+
+        truncated: boolean;
+
+        /**
+         * The number of bytes that have been read so far.
+         */
+        bytesRead: number;
+}
+
+export interface Busboy extends Writable {
+    addListener<Event extends keyof BusboyEvents>(event: Event, listener: BusboyEvents[Event]): this;
+
+    addListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    on<Event extends keyof BusboyEvents>(event: Event, listener: BusboyEvents[Event]): this;
+
+    on(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    once<Event extends keyof BusboyEvents>(event: Event, listener: BusboyEvents[Event]): this;
+
+    once(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    removeListener<Event extends keyof BusboyEvents>(event: Event, listener: BusboyEvents[Event]): this;
+
+    removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    off<Event extends keyof BusboyEvents>(event: Event, listener: BusboyEvents[Event]): this;
+
+    off(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    prependListener<Event extends keyof BusboyEvents>(event: Event, listener: BusboyEvents[Event]): this;
+
+    prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    prependOnceListener<Event extends keyof BusboyEvents>(event: Event, listener: BusboyEvents[Event]): this;
+
+    prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
+}
+
+export interface BusboyEvents {
+    /**
+     * Emitted for each new file form field found.
+     *
+     * * Note: if you listen for this event, you should always handle the `stream` no matter if you care about the
+     * file contents or not (e.g. you can simply just do `stream.resume();` if you want to discard the contents),
+     * otherwise the 'finish' event will never fire on the Busboy instance. However, if you don't care about **any**
+     * incoming files, you can simply not listen for the 'file' event at all and any/all files will be automatically
+     * and safely discarded (these discarded files do still count towards `files` and `parts` limits).
+     * * If a configured file size limit was reached, `stream` will both have a boolean property `truncated`
+     * (best checked at the end of the stream) and emit a 'limit' event to notify you when this happens.
+     *
+     * @param listener.transferEncoding Contains the 'Content-Transfer-Encoding' value for the file stream.
+     * @param listener.mimeType Contains the 'Content-Type' value for the file stream.
+     */
+    file: (
+        fieldname: string,
+        stream: BusboyFileStream,
+        filename: string,
+        transferEncoding: string,
+        mimeType: string,
+    ) => void;
+    /**
+     * Emitted for each new non-file field found.
+     */
+    field: (
+        fieldname: string,
+        value: string,
+        fieldnameTruncated: boolean,
+        valueTruncated: boolean,
+        transferEncoding: string,
+        mimeType: string,
+    ) => void;
+    finish: () => void;
+    /**
+     * Emitted when specified `parts` limit has been reached. No more 'file' or 'field' events will be emitted.
+     */
+    partsLimit: () => void;
+    /**
+     *  Emitted when specified `files` limit has been reached. No more 'file' events will be emitted.
+     */
+    filesLimit: () => void;
+    /**
+     * Emitted when specified `fields` limit has been reached. No more 'field' events will be emitted.
+     */
+    fieldsLimit: () => void;
+    error: (error: unknown) => void;
+}
+
+export interface BusboyConstructor {
+    (options: BusboyConfig): Busboy;
+
+    new(options: BusboyConfig): Busboy;
+}
+
diff --git a/fastify-busboy/lib/main.js b/fastify-busboy/lib/main.js
new file mode 100644
index 0000000..8794beb
--- /dev/null
+++ b/fastify-busboy/lib/main.js
@@ -0,0 +1,85 @@
+'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
diff --git a/fastify-busboy/lib/types/multipart.js b/fastify-busboy/lib/types/multipart.js
new file mode 100644
index 0000000..ad242db
--- /dev/null
+++ b/fastify-busboy/lib/types/multipart.js
@@ -0,0 +1,306 @@
+'use strict'
+
+// TODO:
+//  * support 1 nested multipart level
+//    (see second multipart example here:
+//     http://www.w3.org/TR/html401/interact/forms.html#didx-multipartform-data)
+//  * support limits.fieldNameSize
+//     -- this will require modifications to utils.parseParams
+
+const { Readable } = require('node:stream')
+const { inherits } = require('node:util')
+
+const Dicer = require('../../deps/dicer/lib/Dicer')
+
+const parseParams = require('../utils/parseParams')
+const decodeText = require('../utils/decodeText')
+const basename = require('../utils/basename')
+const getLimit = require('../utils/getLimit')
+
+const RE_BOUNDARY = /^boundary$/i
+const RE_FIELD = /^form-data$/i
+const RE_CHARSET = /^charset$/i
+const RE_FILENAME = /^filename$/i
+const RE_NAME = /^name$/i
+
+Multipart.detect = /^multipart\/form-data/i
+function Multipart (boy, cfg) {
+  let i
+  let len
+  const self = this
+  let boundary
+  const limits = cfg.limits
+  const isPartAFile = cfg.isPartAFile || ((fieldName, contentType, fileName) => (contentType === 'application/octet-stream' || fileName !== undefined))
+  const parsedConType = cfg.parsedConType || []
+  const defCharset = cfg.defCharset || 'utf8'
+  const preservePath = cfg.preservePath
+  const fileOpts = { highWaterMark: cfg.fileHwm }
+
+  for (i = 0, len = parsedConType.length; i < len; ++i) {
+    if (Array.isArray(parsedConType[i]) &&
+      RE_BOUNDARY.test(parsedConType[i][0])) {
+      boundary = parsedConType[i][1]
+      break
+    }
+  }
+
+  function checkFinished () {
+    if (nends === 0 && finished && !boy._done) {
+      finished = false
+      self.end()
+    }
+  }
+
+  if (typeof boundary !== 'string') { throw new Error('Multipart: Boundary not found') }
+
+  const fieldSizeLimit = getLimit(limits, 'fieldSize', 1 * 1024 * 1024)
+  const fileSizeLimit = getLimit(limits, 'fileSize', Infinity)
+  const filesLimit = getLimit(limits, 'files', Infinity)
+  const fieldsLimit = getLimit(limits, 'fields', Infinity)
+  const partsLimit = getLimit(limits, 'parts', Infinity)
+  const headerPairsLimit = getLimit(limits, 'headerPairs', 2000)
+  const headerSizeLimit = getLimit(limits, 'headerSize', 80 * 1024)
+
+  let nfiles = 0
+  let nfields = 0
+  let nends = 0
+  let curFile
+  let curField
+  let finished = false
+
+  this._needDrain = false
+  this._pause = false
+  this._cb = undefined
+  this._nparts = 0
+  this._boy = boy
+
+  const parserCfg = {
+    boundary,
+    maxHeaderPairs: headerPairsLimit,
+    maxHeaderSize: headerSizeLimit,
+    partHwm: fileOpts.highWaterMark,
+    highWaterMark: cfg.highWaterMark
+  }
+
+  this.parser = new Dicer(parserCfg)
+  this.parser.on('drain', function () {
+    self._needDrain = false
+    if (self._cb && !self._pause) {
+      const cb = self._cb
+      self._cb = undefined
+      cb()
+    }
+  }).on('part', function onPart (part) {
+    if (++self._nparts > partsLimit) {
+      self.parser.removeListener('part', onPart)
+      self.parser.on('part', skipPart)
+      boy.hitPartsLimit = true
+      boy.emit('partsLimit')
+      return skipPart(part)
+    }
+
+    // hack because streams2 _always_ doesn't emit 'end' until nextTick, so let
+    // us emit 'end' early since we know the part has ended if we are already
+    // seeing the next part
+    if (curField) {
+      const field = curField
+      field.emit('end')
+      field.removeAllListeners('end')
+    }
+
+    part.on('header', function (header) {
+      let contype
+      let fieldname
+      let parsed
+      let charset
+      let encoding
+      let filename
+      let nsize = 0
+
+      if (header['content-type']) {
+        parsed = parseParams(header['content-type'][0])
+        if (parsed[0]) {
+          contype = parsed[0].toLowerCase()
+          for (i = 0, len = parsed.length; i < len; ++i) {
+            if (RE_CHARSET.test(parsed[i][0])) {
+              charset = parsed[i][1].toLowerCase()
+              break
+            }
+          }
+        }
+      }
+
+      if (contype === undefined) { contype = 'text/plain' }
+      if (charset === undefined) { charset = defCharset }
+
+      if (header['content-disposition']) {
+        parsed = parseParams(header['content-disposition'][0])
+        if (!RE_FIELD.test(parsed[0])) { return skipPart(part) }
+        for (i = 0, len = parsed.length; i < len; ++i) {
+          if (RE_NAME.test(parsed[i][0])) {
+            fieldname = parsed[i][1]
+          } else if (RE_FILENAME.test(parsed[i][0])) {
+            filename = parsed[i][1]
+            if (!preservePath) { filename = basename(filename) }
+          }
+        }
+      } else { return skipPart(part) }
+
+      if (header['content-transfer-encoding']) { encoding = header['content-transfer-encoding'][0].toLowerCase() } else { encoding = '7bit' }
+
+      let onData,
+        onEnd
+
+      if (isPartAFile(fieldname, contype, filename)) {
+        // file/binary field
+        if (nfiles === filesLimit) {
+          if (!boy.hitFilesLimit) {
+            boy.hitFilesLimit = true
+            boy.emit('filesLimit')
+          }
+          return skipPart(part)
+        }
+
+        ++nfiles
+
+        if (!boy._events.file) {
+          self.parser._ignore()
+          return
+        }
+
+        ++nends
+        const file = new FileStream(fileOpts)
+        curFile = file
+        file.on('end', function () {
+          --nends
+          self._pause = false
+          checkFinished()
+          if (self._cb && !self._needDrain) {
+            const cb = self._cb
+            self._cb = undefined
+            cb()
+          }
+        })
+        file._read = function (n) {
+          if (!self._pause) { return }
+          self._pause = false
+          if (self._cb && !self._needDrain) {
+            const cb = self._cb
+            self._cb = undefined
+            cb()
+          }
+        }
+        boy.emit('file', fieldname, file, filename, encoding, contype)
+
+        onData = function (data) {
+          if ((nsize += data.length) > fileSizeLimit) {
+            const extralen = fileSizeLimit - nsize + data.length
+            if (extralen > 0) { file.push(data.slice(0, extralen)) }
+            file.truncated = true
+            file.bytesRead = fileSizeLimit
+            part.removeAllListeners('data')
+            file.emit('limit')
+            return
+          } else if (!file.push(data)) { self._pause = true }
+
+          file.bytesRead = nsize
+        }
+
+        onEnd = function () {
+          curFile = undefined
+          file.push(null)
+        }
+      } else {
+        // non-file field
+        if (nfields === fieldsLimit) {
+          if (!boy.hitFieldsLimit) {
+            boy.hitFieldsLimit = true
+            boy.emit('fieldsLimit')
+          }
+          return skipPart(part)
+        }
+
+        ++nfields
+        ++nends
+        let buffer = ''
+        let truncated = false
+        curField = part
+
+        onData = function (data) {
+          if ((nsize += data.length) > fieldSizeLimit) {
+            const extralen = (fieldSizeLimit - (nsize - data.length))
+            buffer += data.toString('binary', 0, extralen)
+            truncated = true
+            part.removeAllListeners('data')
+          } else { buffer += data.toString('binary') }
+        }
+
+        onEnd = function () {
+          curField = undefined
+          if (buffer.length) { buffer = decodeText(buffer, 'binary', charset) }
+          boy.emit('field', fieldname, buffer, false, truncated, encoding, contype)
+          --nends
+          checkFinished()
+        }
+      }
+
+      /* As of node@2efe4ab761666 (v0.10.29+/v0.11.14+), busboy had become
+         broken. Streams2/streams3 is a huge black box of confusion, but
+         somehow overriding the sync state seems to fix things again (and still
+         seems to work for previous node versions).
+      */
+      part._readableState.sync = false
+
+      part.on('data', onData)
+      part.on('end', onEnd)
+    }).on('error', function (err) {
+      if (curFile) { curFile.emit('error', err) }
+    })
+  }).on('error', function (err) {
+    boy.emit('error', err)
+  }).on('finish', function () {
+    finished = true
+    checkFinished()
+  })
+}
+
+Multipart.prototype.write = function (chunk, cb) {
+  const r = this.parser.write(chunk)
+  if (r && !this._pause) {
+    cb()
+  } else {
+    this._needDrain = !r
+    this._cb = cb
+  }
+}
+
+Multipart.prototype.end = function () {
+  const self = this
+
+  if (self.parser.writable) {
+    self.parser.end()
+  } else if (!self._boy._done) {
+    process.nextTick(function () {
+      self._boy._done = true
+      self._boy.emit('finish')
+    })
+  }
+}
+
+function skipPart (part) {
+  part.resume()
+}
+
+function FileStream (opts) {
+  Readable.call(this, opts)
+
+  this.bytesRead = 0
+
+  this.truncated = false
+}
+
+inherits(FileStream, Readable)
+
+FileStream.prototype._read = function (n) {}
+
+module.exports = Multipart
diff --git a/fastify-busboy/lib/types/urlencoded.js b/fastify-busboy/lib/types/urlencoded.js
new file mode 100644
index 0000000..6f5f784
--- /dev/null
+++ b/fastify-busboy/lib/types/urlencoded.js
@@ -0,0 +1,190 @@
+'use strict'
+
+const Decoder = require('../utils/Decoder')
+const decodeText = require('../utils/decodeText')
+const getLimit = require('../utils/getLimit')
+
+const RE_CHARSET = /^charset$/i
+
+UrlEncoded.detect = /^application\/x-www-form-urlencoded/i
+function UrlEncoded (boy, cfg) {
+  const limits = cfg.limits
+  const parsedConType = cfg.parsedConType
+  this.boy = boy
+
+  this.fieldSizeLimit = getLimit(limits, 'fieldSize', 1 * 1024 * 1024)
+  this.fieldNameSizeLimit = getLimit(limits, 'fieldNameSize', 100)
+  this.fieldsLimit = getLimit(limits, 'fields', Infinity)
+
+  let charset
+  for (var i = 0, len = parsedConType.length; i < len; ++i) { // eslint-disable-line no-var
+    if (Array.isArray(parsedConType[i]) &&
+        RE_CHARSET.test(parsedConType[i][0])) {
+      charset = parsedConType[i][1].toLowerCase()
+      break
+    }
+  }
+
+  if (charset === undefined) { charset = cfg.defCharset || 'utf8' }
+
+  this.decoder = new Decoder()
+  this.charset = charset
+  this._fields = 0
+  this._state = 'key'
+  this._checkingBytes = true
+  this._bytesKey = 0
+  this._bytesVal = 0
+  this._key = ''
+  this._val = ''
+  this._keyTrunc = false
+  this._valTrunc = false
+  this._hitLimit = false
+}
+
+UrlEncoded.prototype.write = function (data, cb) {
+  if (this._fields === this.fieldsLimit) {
+    if (!this.boy.hitFieldsLimit) {
+      this.boy.hitFieldsLimit = true
+      this.boy.emit('fieldsLimit')
+    }
+    return cb()
+  }
+
+  let idxeq; let idxamp; let i; let p = 0; const len = data.length
+
+  while (p < len) {
+    if (this._state === 'key') {
+      idxeq = idxamp = undefined
+      for (i = p; i < len; ++i) {
+        if (!this._checkingBytes) { ++p }
+        if (data[i] === 0x3D/* = */) {
+          idxeq = i
+          break
+        } else if (data[i] === 0x26/* & */) {
+          idxamp = i
+          break
+        }
+        if (this._checkingBytes && this._bytesKey === this.fieldNameSizeLimit) {
+          this._hitLimit = true
+          break
+        } else if (this._checkingBytes) { ++this._bytesKey }
+      }
+
+      if (idxeq !== undefined) {
+        // key with assignment
+        if (idxeq > p) { this._key += this.decoder.write(data.toString('binary', p, idxeq)) }
+        this._state = 'val'
+
+        this._hitLimit = false
+        this._checkingBytes = true
+        this._val = ''
+        this._bytesVal = 0
+        this._valTrunc = false
+        this.decoder.reset()
+
+        p = idxeq + 1
+      } else if (idxamp !== undefined) {
+        // key with no assignment
+        ++this._fields
+        let key; const keyTrunc = this._keyTrunc
+        if (idxamp > p) { key = (this._key += this.decoder.write(data.toString('binary', p, idxamp))) } else { key = this._key }
+
+        this._hitLimit = false
+        this._checkingBytes = true
+        this._key = ''
+        this._bytesKey = 0
+        this._keyTrunc = false
+        this.decoder.reset()
+
+        if (key.length) {
+          this.boy.emit('field', decodeText(key, 'binary', this.charset),
+            '',
+            keyTrunc,
+            false)
+        }
+
+        p = idxamp + 1
+        if (this._fields === this.fieldsLimit) { return cb() }
+      } else if (this._hitLimit) {
+        // we may not have hit the actual limit if there are encoded bytes...
+        if (i > p) { this._key += this.decoder.write(data.toString('binary', p, i)) }
+        p = i
+        if ((this._bytesKey = this._key.length) === this.fieldNameSizeLimit) {
+          // yep, we actually did hit the limit
+          this._checkingBytes = false
+          this._keyTrunc = true
+        }
+      } else {
+        if (p < len) { this._key += this.decoder.write(data.toString('binary', p)) }
+        p = len
+      }
+    } else {
+      idxamp = undefined
+      for (i = p; i < len; ++i) {
+        if (!this._checkingBytes) { ++p }
+        if (data[i] === 0x26/* & */) {
+          idxamp = i
+          break
+        }
+        if (this._checkingBytes && this._bytesVal === this.fieldSizeLimit) {
+          this._hitLimit = true
+          break
+        } else if (this._checkingBytes) { ++this._bytesVal }
+      }
+
+      if (idxamp !== undefined) {
+        ++this._fields
+        if (idxamp > p) { this._val += this.decoder.write(data.toString('binary', p, idxamp)) }
+        this.boy.emit('field', decodeText(this._key, 'binary', this.charset),
+          decodeText(this._val, 'binary', this.charset),
+          this._keyTrunc,
+          this._valTrunc)
+        this._state = 'key'
+
+        this._hitLimit = false
+        this._checkingBytes = true
+        this._key = ''
+        this._bytesKey = 0
+        this._keyTrunc = false
+        this.decoder.reset()
+
+        p = idxamp + 1
+        if (this._fields === this.fieldsLimit) { return cb() }
+      } else if (this._hitLimit) {
+        // we may not have hit the actual limit if there are encoded bytes...
+        if (i > p) { this._val += this.decoder.write(data.toString('binary', p, i)) }
+        p = i
+        if ((this._val === '' && this.fieldSizeLimit === 0) ||
+            (this._bytesVal = this._val.length) === this.fieldSizeLimit) {
+          // yep, we actually did hit the limit
+          this._checkingBytes = false
+          this._valTrunc = true
+        }
+      } else {
+        if (p < len) { this._val += this.decoder.write(data.toString('binary', p)) }
+        p = len
+      }
+    }
+  }
+  cb()
+}
+
+UrlEncoded.prototype.end = function () {
+  if (this.boy._done) { return }
+
+  if (this._state === 'key' && this._key.length > 0) {
+    this.boy.emit('field', decodeText(this._key, 'binary', this.charset),
+      '',
+      this._keyTrunc,
+      false)
+  } else if (this._state === 'val') {
+    this.boy.emit('field', decodeText(this._key, 'binary', this.charset),
+      decodeText(this._val, 'binary', this.charset),
+      this._keyTrunc,
+      this._valTrunc)
+  }
+  this.boy._done = true
+  this.boy.emit('finish')
+}
+
+module.exports = UrlEncoded
diff --git a/fastify-busboy/lib/utils/Decoder.js b/fastify-busboy/lib/utils/Decoder.js
new file mode 100644
index 0000000..7917678
--- /dev/null
+++ b/fastify-busboy/lib/utils/Decoder.js
@@ -0,0 +1,54 @@
+'use strict'
+
+const RE_PLUS = /\+/g
+
+const HEX = [
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0,
+  0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+]
+
+function Decoder () {
+  this.buffer = undefined
+}
+Decoder.prototype.write = function (str) {
+  // Replace '+' with ' ' before decoding
+  str = str.replace(RE_PLUS, ' ')
+  let res = ''
+  let i = 0; let p = 0; const len = str.length
+  for (; i < len; ++i) {
+    if (this.buffer !== undefined) {
+      if (!HEX[str.charCodeAt(i)]) {
+        res += '%' + this.buffer
+        this.buffer = undefined
+        --i // retry character
+      } else {
+        this.buffer += str[i]
+        ++p
+        if (this.buffer.length === 2) {
+          res += String.fromCharCode(parseInt(this.buffer, 16))
+          this.buffer = undefined
+        }
+      }
+    } else if (str[i] === '%') {
+      if (i > p) {
+        res += str.substring(p, i)
+        p = i
+      }
+      this.buffer = ''
+      ++p
+    }
+  }
+  if (p < len && this.buffer === undefined) { res += str.substring(p) }
+  return res
+}
+Decoder.prototype.reset = function () {
+  this.buffer = undefined
+}
+
+module.exports = Decoder
diff --git a/fastify-busboy/lib/utils/basename.js b/fastify-busboy/lib/utils/basename.js
new file mode 100644
index 0000000..db58819
--- /dev/null
+++ b/fastify-busboy/lib/utils/basename.js
@@ -0,0 +1,14 @@
+'use strict'
+
+module.exports = function basename (path) {
+  if (typeof path !== 'string') { return '' }
+  for (var i = path.length - 1; i >= 0; --i) { // eslint-disable-line no-var
+    switch (path.charCodeAt(i)) {
+      case 0x2F: // '/'
+      case 0x5C: // '\'
+        path = path.slice(i + 1)
+        return (path === '..' || path === '.' ? '' : path)
+    }
+  }
+  return (path === '..' || path === '.' ? '' : path)
+}
diff --git a/fastify-busboy/lib/utils/decodeText.js b/fastify-busboy/lib/utils/decodeText.js
new file mode 100644
index 0000000..be35d6b
--- /dev/null
+++ b/fastify-busboy/lib/utils/decodeText.js
@@ -0,0 +1,114 @@
+'use strict'
+
+// Node has always utf-8
+const utf8Decoder = new TextDecoder('utf-8')
+const textDecoders = new Map([
+  ['utf-8', utf8Decoder],
+  ['utf8', utf8Decoder]
+])
+
+function getDecoder (charset) {
+  let lc
+  while (true) {
+    switch (charset) {
+      case 'utf-8':
+      case 'utf8':
+        return decoders.utf8
+      case 'latin1':
+      case 'ascii': // TODO: Make these a separate, strict decoder?
+      case 'us-ascii':
+      case 'iso-8859-1':
+      case 'iso8859-1':
+      case 'iso88591':
+      case 'iso_8859-1':
+      case 'windows-1252':
+      case 'iso_8859-1:1987':
+      case 'cp1252':
+      case 'x-cp1252':
+        return decoders.latin1
+      case 'utf16le':
+      case 'utf-16le':
+      case 'ucs2':
+      case 'ucs-2':
+        return decoders.utf16le
+      case 'base64':
+        return decoders.base64
+      default:
+        if (lc === undefined) {
+          lc = true
+          charset = charset.toLowerCase()
+          continue
+        }
+        return decoders.other.bind(charset)
+    }
+  }
+}
+
+const decoders = {
+  utf8: (data, sourceEncoding) => {
+    if (data.length === 0) {
+      return ''
+    }
+    if (typeof data === 'string') {
+      data = Buffer.from(data, sourceEncoding)
+    }
+    return data.utf8Slice(0, data.length)
+  },
+
+  latin1: (data, sourceEncoding) => {
+    if (data.length === 0) {
+      return ''
+    }
+    if (typeof data === 'string') {
+      return data
+    }
+    return data.latin1Slice(0, data.length)
+  },
+
+  utf16le: (data, sourceEncoding) => {
+    if (data.length === 0) {
+      return ''
+    }
+    if (typeof data === 'string') {
+      data = Buffer.from(data, sourceEncoding)
+    }
+    return data.ucs2Slice(0, data.length)
+  },
+
+  base64: (data, sourceEncoding) => {
+    if (data.length === 0) {
+      return ''
+    }
+    if (typeof data === 'string') {
+      data = Buffer.from(data, sourceEncoding)
+    }
+    return data.base64Slice(0, data.length)
+  },
+
+  other: (data, sourceEncoding) => {
+    if (data.length === 0) {
+      return ''
+    }
+    if (typeof data === 'string') {
+      data = Buffer.from(data, sourceEncoding)
+    }
+
+    if (textDecoders.has(this.toString())) {
+      try {
+        return textDecoders.get(this).decode(data)
+      } catch (e) { }
+    }
+    return typeof data === 'string'
+      ? data
+      : data.toString()
+  }
+}
+
+function decodeText (text, sourceEncoding, destEncoding) {
+  if (text) {
+    return getDecoder(destEncoding)(text, sourceEncoding)
+  }
+  return text
+}
+
+module.exports = decodeText
diff --git a/fastify-busboy/lib/utils/getLimit.js b/fastify-busboy/lib/utils/getLimit.js
new file mode 100644
index 0000000..cb64fd6
--- /dev/null
+++ b/fastify-busboy/lib/utils/getLimit.js
@@ -0,0 +1,16 @@
+'use strict'
+
+module.exports = function getLimit (limits, name, defaultLimit) {
+  if (
+    !limits ||
+    limits[name] === undefined ||
+    limits[name] === null
+  ) { return defaultLimit }
+
+  if (
+    typeof limits[name] !== 'number' ||
+    isNaN(limits[name])
+  ) { throw new TypeError('Limit ' + name + ' is not a valid number') }
+
+  return limits[name]
+}
diff --git a/fastify-busboy/lib/utils/parseParams.js b/fastify-busboy/lib/utils/parseParams.js
new file mode 100644
index 0000000..1698e62
--- /dev/null
+++ b/fastify-busboy/lib/utils/parseParams.js
@@ -0,0 +1,196 @@
+/* eslint-disable object-property-newline */
+'use strict'
+
+const decodeText = require('./decodeText')
+
+const RE_ENCODED = /%[a-fA-F0-9][a-fA-F0-9]/g
+
+const EncodedLookup = {
+  '%00': '\x00', '%01': '\x01', '%02': '\x02', '%03': '\x03', '%04': '\x04',
+  '%05': '\x05', '%06': '\x06', '%07': '\x07', '%08': '\x08', '%09': '\x09',
+  '%0a': '\x0a', '%0A': '\x0a', '%0b': '\x0b', '%0B': '\x0b', '%0c': '\x0c',
+  '%0C': '\x0c', '%0d': '\x0d', '%0D': '\x0d', '%0e': '\x0e', '%0E': '\x0e',
+  '%0f': '\x0f', '%0F': '\x0f', '%10': '\x10', '%11': '\x11', '%12': '\x12',
+  '%13': '\x13', '%14': '\x14', '%15': '\x15', '%16': '\x16', '%17': '\x17',
+  '%18': '\x18', '%19': '\x19', '%1a': '\x1a', '%1A': '\x1a', '%1b': '\x1b',
+  '%1B': '\x1b', '%1c': '\x1c', '%1C': '\x1c', '%1d': '\x1d', '%1D': '\x1d',
+  '%1e': '\x1e', '%1E': '\x1e', '%1f': '\x1f', '%1F': '\x1f', '%20': '\x20',
+  '%21': '\x21', '%22': '\x22', '%23': '\x23', '%24': '\x24', '%25': '\x25',
+  '%26': '\x26', '%27': '\x27', '%28': '\x28', '%29': '\x29', '%2a': '\x2a',
+  '%2A': '\x2a', '%2b': '\x2b', '%2B': '\x2b', '%2c': '\x2c', '%2C': '\x2c',
+  '%2d': '\x2d', '%2D': '\x2d', '%2e': '\x2e', '%2E': '\x2e', '%2f': '\x2f',
+  '%2F': '\x2f', '%30': '\x30', '%31': '\x31', '%32': '\x32', '%33': '\x33',
+  '%34': '\x34', '%35': '\x35', '%36': '\x36', '%37': '\x37', '%38': '\x38',
+  '%39': '\x39', '%3a': '\x3a', '%3A': '\x3a', '%3b': '\x3b', '%3B': '\x3b',
+  '%3c': '\x3c', '%3C': '\x3c', '%3d': '\x3d', '%3D': '\x3d', '%3e': '\x3e',
+  '%3E': '\x3e', '%3f': '\x3f', '%3F': '\x3f', '%40': '\x40', '%41': '\x41',
+  '%42': '\x42', '%43': '\x43', '%44': '\x44', '%45': '\x45', '%46': '\x46',
+  '%47': '\x47', '%48': '\x48', '%49': '\x49', '%4a': '\x4a', '%4A': '\x4a',
+  '%4b': '\x4b', '%4B': '\x4b', '%4c': '\x4c', '%4C': '\x4c', '%4d': '\x4d',
+  '%4D': '\x4d', '%4e': '\x4e', '%4E': '\x4e', '%4f': '\x4f', '%4F': '\x4f',
+  '%50': '\x50', '%51': '\x51', '%52': '\x52', '%53': '\x53', '%54': '\x54',
+  '%55': '\x55', '%56': '\x56', '%57': '\x57', '%58': '\x58', '%59': '\x59',
+  '%5a': '\x5a', '%5A': '\x5a', '%5b': '\x5b', '%5B': '\x5b', '%5c': '\x5c',
+  '%5C': '\x5c', '%5d': '\x5d', '%5D': '\x5d', '%5e': '\x5e', '%5E': '\x5e',
+  '%5f': '\x5f', '%5F': '\x5f', '%60': '\x60', '%61': '\x61', '%62': '\x62',
+  '%63': '\x63', '%64': '\x64', '%65': '\x65', '%66': '\x66', '%67': '\x67',
+  '%68': '\x68', '%69': '\x69', '%6a': '\x6a', '%6A': '\x6a', '%6b': '\x6b',
+  '%6B': '\x6b', '%6c': '\x6c', '%6C': '\x6c', '%6d': '\x6d', '%6D': '\x6d',
+  '%6e': '\x6e', '%6E': '\x6e', '%6f': '\x6f', '%6F': '\x6f', '%70': '\x70',
+  '%71': '\x71', '%72': '\x72', '%73': '\x73', '%74': '\x74', '%75': '\x75',
+  '%76': '\x76', '%77': '\x77', '%78': '\x78', '%79': '\x79', '%7a': '\x7a',
+  '%7A': '\x7a', '%7b': '\x7b', '%7B': '\x7b', '%7c': '\x7c', '%7C': '\x7c',
+  '%7d': '\x7d', '%7D': '\x7d', '%7e': '\x7e', '%7E': '\x7e', '%7f': '\x7f',
+  '%7F': '\x7f', '%80': '\x80', '%81': '\x81', '%82': '\x82', '%83': '\x83',
+  '%84': '\x84', '%85': '\x85', '%86': '\x86', '%87': '\x87', '%88': '\x88',
+  '%89': '\x89', '%8a': '\x8a', '%8A': '\x8a', '%8b': '\x8b', '%8B': '\x8b',
+  '%8c': '\x8c', '%8C': '\x8c', '%8d': '\x8d', '%8D': '\x8d', '%8e': '\x8e',
+  '%8E': '\x8e', '%8f': '\x8f', '%8F': '\x8f', '%90': '\x90', '%91': '\x91',
+  '%92': '\x92', '%93': '\x93', '%94': '\x94', '%95': '\x95', '%96': '\x96',
+  '%97': '\x97', '%98': '\x98', '%99': '\x99', '%9a': '\x9a', '%9A': '\x9a',
+  '%9b': '\x9b', '%9B': '\x9b', '%9c': '\x9c', '%9C': '\x9c', '%9d': '\x9d',
+  '%9D': '\x9d', '%9e': '\x9e', '%9E': '\x9e', '%9f': '\x9f', '%9F': '\x9f',
+  '%a0': '\xa0', '%A0': '\xa0', '%a1': '\xa1', '%A1': '\xa1', '%a2': '\xa2',
+  '%A2': '\xa2', '%a3': '\xa3', '%A3': '\xa3', '%a4': '\xa4', '%A4': '\xa4',
+  '%a5': '\xa5', '%A5': '\xa5', '%a6': '\xa6', '%A6': '\xa6', '%a7': '\xa7',
+  '%A7': '\xa7', '%a8': '\xa8', '%A8': '\xa8', '%a9': '\xa9', '%A9': '\xa9',
+  '%aa': '\xaa', '%Aa': '\xaa', '%aA': '\xaa', '%AA': '\xaa', '%ab': '\xab',
+  '%Ab': '\xab', '%aB': '\xab', '%AB': '\xab', '%ac': '\xac', '%Ac': '\xac',
+  '%aC': '\xac', '%AC': '\xac', '%ad': '\xad', '%Ad': '\xad', '%aD': '\xad',
+  '%AD': '\xad', '%ae': '\xae', '%Ae': '\xae', '%aE': '\xae', '%AE': '\xae',
+  '%af': '\xaf', '%Af': '\xaf', '%aF': '\xaf', '%AF': '\xaf', '%b0': '\xb0',
+  '%B0': '\xb0', '%b1': '\xb1', '%B1': '\xb1', '%b2': '\xb2', '%B2': '\xb2',
+  '%b3': '\xb3', '%B3': '\xb3', '%b4': '\xb4', '%B4': '\xb4', '%b5': '\xb5',
+  '%B5': '\xb5', '%b6': '\xb6', '%B6': '\xb6', '%b7': '\xb7', '%B7': '\xb7',
+  '%b8': '\xb8', '%B8': '\xb8', '%b9': '\xb9', '%B9': '\xb9', '%ba': '\xba',
+  '%Ba': '\xba', '%bA': '\xba', '%BA': '\xba', '%bb': '\xbb', '%Bb': '\xbb',
+  '%bB': '\xbb', '%BB': '\xbb', '%bc': '\xbc', '%Bc': '\xbc', '%bC': '\xbc',
+  '%BC': '\xbc', '%bd': '\xbd', '%Bd': '\xbd', '%bD': '\xbd', '%BD': '\xbd',
+  '%be': '\xbe', '%Be': '\xbe', '%bE': '\xbe', '%BE': '\xbe', '%bf': '\xbf',
+  '%Bf': '\xbf', '%bF': '\xbf', '%BF': '\xbf', '%c0': '\xc0', '%C0': '\xc0',
+  '%c1': '\xc1', '%C1': '\xc1', '%c2': '\xc2', '%C2': '\xc2', '%c3': '\xc3',
+  '%C3': '\xc3', '%c4': '\xc4', '%C4': '\xc4', '%c5': '\xc5', '%C5': '\xc5',
+  '%c6': '\xc6', '%C6': '\xc6', '%c7': '\xc7', '%C7': '\xc7', '%c8': '\xc8',
+  '%C8': '\xc8', '%c9': '\xc9', '%C9': '\xc9', '%ca': '\xca', '%Ca': '\xca',
+  '%cA': '\xca', '%CA': '\xca', '%cb': '\xcb', '%Cb': '\xcb', '%cB': '\xcb',
+  '%CB': '\xcb', '%cc': '\xcc', '%Cc': '\xcc', '%cC': '\xcc', '%CC': '\xcc',
+  '%cd': '\xcd', '%Cd': '\xcd', '%cD': '\xcd', '%CD': '\xcd', '%ce': '\xce',
+  '%Ce': '\xce', '%cE': '\xce', '%CE': '\xce', '%cf': '\xcf', '%Cf': '\xcf',
+  '%cF': '\xcf', '%CF': '\xcf', '%d0': '\xd0', '%D0': '\xd0', '%d1': '\xd1',
+  '%D1': '\xd1', '%d2': '\xd2', '%D2': '\xd2', '%d3': '\xd3', '%D3': '\xd3',
+  '%d4': '\xd4', '%D4': '\xd4', '%d5': '\xd5', '%D5': '\xd5', '%d6': '\xd6',
+  '%D6': '\xd6', '%d7': '\xd7', '%D7': '\xd7', '%d8': '\xd8', '%D8': '\xd8',
+  '%d9': '\xd9', '%D9': '\xd9', '%da': '\xda', '%Da': '\xda', '%dA': '\xda',
+  '%DA': '\xda', '%db': '\xdb', '%Db': '\xdb', '%dB': '\xdb', '%DB': '\xdb',
+  '%dc': '\xdc', '%Dc': '\xdc', '%dC': '\xdc', '%DC': '\xdc', '%dd': '\xdd',
+  '%Dd': '\xdd', '%dD': '\xdd', '%DD': '\xdd', '%de': '\xde', '%De': '\xde',
+  '%dE': '\xde', '%DE': '\xde', '%df': '\xdf', '%Df': '\xdf', '%dF': '\xdf',
+  '%DF': '\xdf', '%e0': '\xe0', '%E0': '\xe0', '%e1': '\xe1', '%E1': '\xe1',
+  '%e2': '\xe2', '%E2': '\xe2', '%e3': '\xe3', '%E3': '\xe3', '%e4': '\xe4',
+  '%E4': '\xe4', '%e5': '\xe5', '%E5': '\xe5', '%e6': '\xe6', '%E6': '\xe6',
+  '%e7': '\xe7', '%E7': '\xe7', '%e8': '\xe8', '%E8': '\xe8', '%e9': '\xe9',
+  '%E9': '\xe9', '%ea': '\xea', '%Ea': '\xea', '%eA': '\xea', '%EA': '\xea',
+  '%eb': '\xeb', '%Eb': '\xeb', '%eB': '\xeb', '%EB': '\xeb', '%ec': '\xec',
+  '%Ec': '\xec', '%eC': '\xec', '%EC': '\xec', '%ed': '\xed', '%Ed': '\xed',
+  '%eD': '\xed', '%ED': '\xed', '%ee': '\xee', '%Ee': '\xee', '%eE': '\xee',
+  '%EE': '\xee', '%ef': '\xef', '%Ef': '\xef', '%eF': '\xef', '%EF': '\xef',
+  '%f0': '\xf0', '%F0': '\xf0', '%f1': '\xf1', '%F1': '\xf1', '%f2': '\xf2',
+  '%F2': '\xf2', '%f3': '\xf3', '%F3': '\xf3', '%f4': '\xf4', '%F4': '\xf4',
+  '%f5': '\xf5', '%F5': '\xf5', '%f6': '\xf6', '%F6': '\xf6', '%f7': '\xf7',
+  '%F7': '\xf7', '%f8': '\xf8', '%F8': '\xf8', '%f9': '\xf9', '%F9': '\xf9',
+  '%fa': '\xfa', '%Fa': '\xfa', '%fA': '\xfa', '%FA': '\xfa', '%fb': '\xfb',
+  '%Fb': '\xfb', '%fB': '\xfb', '%FB': '\xfb', '%fc': '\xfc', '%Fc': '\xfc',
+  '%fC': '\xfc', '%FC': '\xfc', '%fd': '\xfd', '%Fd': '\xfd', '%fD': '\xfd',
+  '%FD': '\xfd', '%fe': '\xfe', '%Fe': '\xfe', '%fE': '\xfe', '%FE': '\xfe',
+  '%ff': '\xff', '%Ff': '\xff', '%fF': '\xff', '%FF': '\xff'
+}
+
+function encodedReplacer (match) {
+  return EncodedLookup[match]
+}
+
+const STATE_KEY = 0
+const STATE_VALUE = 1
+const STATE_CHARSET = 2
+const STATE_LANG = 3
+
+function parseParams (str) {
+  const res = []
+  let state = STATE_KEY
+  let charset = ''
+  let inquote = false
+  let escaping = false
+  let p = 0
+  let tmp = ''
+  const len = str.length
+
+  for (var i = 0; i < len; ++i) { // eslint-disable-line no-var
+    const char = str[i]
+    if (char === '\\' && inquote) {
+      if (escaping) { escaping = false } else {
+        escaping = true
+        continue
+      }
+    } else if (char === '"') {
+      if (!escaping) {
+        if (inquote) {
+          inquote = false
+          state = STATE_KEY
+        } else { inquote = true }
+        continue
+      } else { escaping = false }
+    } else {
+      if (escaping && inquote) { tmp += '\\' }
+      escaping = false
+      if ((state === STATE_CHARSET || state === STATE_LANG) && char === "'") {
+        if (state === STATE_CHARSET) {
+          state = STATE_LANG
+          charset = tmp.substring(1)
+        } else { state = STATE_VALUE }
+        tmp = ''
+        continue
+      } else if (state === STATE_KEY &&
+        (char === '*' || char === '=') &&
+        res.length) {
+        state = char === '*'
+          ? STATE_CHARSET
+          : STATE_VALUE
+        res[p] = [tmp, undefined]
+        tmp = ''
+        continue
+      } else if (!inquote && char === ';') {
+        state = STATE_KEY
+        if (charset) {
+          if (tmp.length) {
+            tmp = decodeText(tmp.replace(RE_ENCODED, encodedReplacer),
+              'binary',
+              charset)
+          }
+          charset = ''
+        } else if (tmp.length) {
+          tmp = decodeText(tmp, 'binary', 'utf8')
+        }
+        if (res[p] === undefined) { res[p] = tmp } else { res[p][1] = tmp }
+        tmp = ''
+        ++p
+        continue
+      } else if (!inquote && (char === ' ' || char === '\t')) { continue }
+    }
+    tmp += char
+  }
+  if (charset && tmp.length) {
+    tmp = decodeText(tmp.replace(RE_ENCODED, encodedReplacer),
+      'binary',
+      charset)
+  } else if (tmp) {
+    tmp = decodeText(tmp, 'binary', 'utf8')
+  }
+
+  if (res[p] === undefined) {
+    if (tmp) { res[p] = tmp }
+  } else { res[p][1] = tmp }
+
+  return res
+}
+
+module.exports = parseParams