.npmignore

@@ -1,2 +0,0 @@
-.travis.yml
-test/

.travis.yml

@@ -1,3 +1,7 @@
 language: node_js
 node_js:
-  - lts/*
+- node
+env:
+  global:
+  - secure: Htsm8eeR11ph6lbAOLPbFfJGou8eDPQMfLXUBx6c9+QgrbBKHM1RKscJNvSi1AM1rOOKSk1pCZwqVR2n+9kQs30MxZppyIngiy5Jcz7/b5FDvnm/JkNzq+7sEeGZzRK11XmFkWuYRK9TvUaDuuo/NOc1NJc0ics/gzrjNLcT1tw=
+  - secure: FufpUBE/caYoQ5MfsIWFYVM0C4gj+4OSaqu6W8exucFDB68zTmO0te11tOwg98PhFnSaDbJ7h3gWXYGTpbFUErkeMBRMTsNjYYoQhcWWjzD4yo5iIfh215TJ5vhE4sIeCCi0TxHgbJkF3KthsUyaOdy/Q3sFISZ/VQSPFBDdmbU=

.zuul.yml

@@ -0,0 +1,16 @@
+ui: tape
+browsers:
+  - name: chrome
+    version: latest
+  - name: firefox
+    version: latest
+  - name: safari
+    version: latest
+  - name: ie
+    version: latest
+  - name: microsoftedge
+    version: latest
+  - name: android
+    version: latest
+  - name: iphone
+    version: latest

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) Feross Aboukhadijeh and WebTorrent, LLC
+Copyright (c) Feross Aboukhadijeh
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in

README.md

@@ -1,17 +1,17 @@
-# ut_metadata [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]
+# ut_metadata [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url]
 
-[travis-image]: https://img.shields.io/travis/webtorrent/ut_metadata/master.svg
+[travis-image]: https://img.shields.io/travis/feross/ut_metadata/master.svg
-[travis-url]: https://travis-ci.org/webtorrent/ut_metadata
+[travis-url]: https://travis-ci.org/feross/ut_metadata
 [npm-image]: https://img.shields.io/npm/v/ut_metadata.svg
 [npm-url]: https://npmjs.org/package/ut_metadata
 [downloads-image]: https://img.shields.io/npm/dm/ut_metadata.svg
 [downloads-url]: https://npmjs.org/package/ut_metadata
-[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg
-[standard-url]: https://standardjs.com
 
 ### BitTorrent Extension for Peers to Send Metadata Files (BEP 9)
 
-JavaScript implementation of the [Extension for Peers to Send Metadata Files (BEP 9)](http://www.bittorrent.org/beps/bep_0009.html). Use with [bittorrent-protocol](https://www.npmjs.com/package/bittorrent-protocol).
+[![Sauce Test Status](https://saucelabs.com/browser-matrix/ut_metadata.svg)](https://saucelabs.com/u/ut_metadata)
+
+Node.js implementation of the [Extension for Peers to Send Metadata Files (BEP 9)](http://www.bittorrent.org/beps/bep_0009.html). Use with [bittorrent-protocol](https://github.com/feross/bittorrent-protocol).
 
 The purpose of this extension is to allow clients to join a swarm and complete a download without the need of downloading a .torrent file first. This extension instead allows clients to download the metadata from peers. It makes it possible to support magnet links, a link on a web page only containing enough information to join the swarm (the info hash).
 
@@ -25,20 +25,20 @@ npm install ut_metadata
 
 ### usage
 
-This package should be used with [bittorrent-protocol](https://www.npmjs.com/package/bittorrent-protocol), which supports a plugin-like system for extending the protocol with additional functionality.
+This package should be used with [bittorrent-protocol](https://github.com/feross/bittorrent-protocol), which supports a plugin-like system for extending the protocol with additional functionality.
 
 Say you're already using `bittorrent-protocol`. Your code might look something like this:
 
 ```js
-const Protocol = require('bittorrent-protocol')
+var Protocol = require('bittorrent-protocol')
-const net = require('net')
+var net = require('net')
 
-net.createServer(socket => {
+net.createServer(function (socket) {
   var wire = new Protocol()
   socket.pipe(wire).pipe(socket)
 
   // handle handshake
-  wire.on('handshake', (infoHash, peerId) => {
+  wire.on('handshake', function (infoHash, peerId) {
     wire.handshake(new Buffer('my info hash'), new Buffer('my peer id'))
   })
 
@@ -48,12 +48,12 @@ net.createServer(socket => {
 To add support for BEP 9, simply modify your code like this:
 
 ```js
-const Protocol = require('bittorrent-protocol')
+var Protocol = require('bittorrent-protocol')
-const net = require('net')
+var net = require('net')
-const ut_metadata = require('ut_metadata')
+var ut_metadata = require('ut_metadata')
 
-net.createServer(socket => {
+net.createServer(function (socket) {
-  const wire = new Protocol()
+  var wire = new Protocol()
   socket.pipe(wire).pipe(socket)
 
   // initialize the extension
@@ -65,7 +65,7 @@ net.createServer(socket => {
   wire.ut_metadata.fetch()
 
   // 'metadata' event will fire when the metadata arrives and is verified to be correct!
-  wire.ut_metadata.on('metadata', metadata => {
+  wire.ut_metadata.on('metadata', function (metadata) {
     // got metadata!
 
     // Note: the event will not fire if the peer does not support ut_metadata, if they
@@ -75,12 +75,12 @@ net.createServer(socket => {
 
   // optionally, listen to the 'warning' event if you want to know that metadata is
   // probably not going to arrive for one of the above reasons.
-  wire.ut_metadata.on('warning', err => {
+  wire.ut_metadata.on('warning', function (err) {
     console.log(err.message)
   })
 
   // handle handshake
-  wire.on('handshake', (infoHash, peerId) => {
+  wire.on('handshake', function (infoHash, peerId) {
     wire.handshake(new Buffer('my info hash'), new Buffer('my peer id'))
   })
 
@@ -95,7 +95,7 @@ Initialize the extension. If you have the torrent metadata (Buffer), pass it int
 `ut_metadata` constructor so it's made available to the peer.
 
 ```js
-const metadata = fs.readFileSync(__dirname + '/file.torrent')
+var metadata = fs.readFileSync(__dirname + '/file.torrent')
 wire.use(ut_metadata(metadata))
 ```
 
@@ -119,7 +119,7 @@ Fired when metadata is available and verified to be correct. Called with a singl
 parameter of type Buffer.
 
 ```js
-wire.ut_metadata.on('metadata', metadata => {
+wire.ut_metadata.on('metadata', function (metadata) {
   console.log(Buffer.isBuffer(metadata)) // true
 })
 ```
@@ -136,11 +136,11 @@ Fired if:
  - the peer repeatedly sent invalid data
 
 ```js
-wire.ut_metadata.on('warning', err => {
+wire.ut_metadata.on('warning', function (err) {
   console.log(err.message)
 })
 ```
 
 ### license
 
-MIT. Copyright (c) [Feross Aboukhadijeh](https://feross.org) and [WebTorrent, LLC](https://webtorrent.io).
+MIT. Copyright (c) [Feross Aboukhadijeh](http://feross.org).

index.js

@@ -1,30 +1,30 @@
-/*! ut_metadata. MIT License. WebTorrent LLC <https://webtorrent.io/opensource> */
+var bencode = require('bencode')
-const { EventEmitter } = require('events')
+var BitField = require('bitfield')
-const bencode = require('bencode')
+var debug = require('debug')('ut_metadata')
-const BitField = require('bitfield').default
+var EventEmitter = require('events').EventEmitter
-const debug = require('debug')('ut_metadata')
+var inherits = require('inherits')
-const sha1 = require('simple-sha1')
+var sha1 = require('simple-sha1')
 
-const MAX_METADATA_SIZE = 1E7 // 10 MB
+var MAX_METADATA_SIZE = 10000000 // 10MB
-const BITFIELD_GROW = 1E3
+var BITFIELD_GROW = 1000
-const PIECE_LENGTH = 1 << 14 // 16 KiB
+var PIECE_LENGTH = 16 * 1024
 
-module.exports = metadata => {
+module.exports = function (metadata) {
-  class utMetadata extends EventEmitter {
+  inherits(ut_metadata, EventEmitter)
-    constructor (wire) {
+
-      super()
+  function ut_metadata (wire) {
+    EventEmitter.call(this)
 
     this._wire = wire
 
-      this._fetching = false
     this._metadataComplete = false
     this._metadataSize = null
-      // how many reject messages to tolerate before quitting
+    this._remainingRejects = null // how many reject messages to tolerate before quitting
-      this._remainingRejects = null
+    this._fetching = false
 
-      // The largest torrent file that I know of is ~1-2MB, which is ~100
+    // The largest .torrent file that I know of is ~1-2MB, which is ~100 pieces.
-      // pieces. Therefore, cap the bitfield to 10x that (1000 pieces) so a
+    // Therefore, cap the bitfield to 10x that (1000 pieces) so a malicious peer can't
-      // malicious peer can't make it grow to fill all memory.
+    // make it grow to fill all memory.
     this._bitfield = new BitField(0, { grow: BITFIELD_GROW })
 
     if (Buffer.isBuffer(metadata)) {
@@ -32,36 +32,39 @@ module.exports = metadata => {
     }
   }
 
-    onHandshake (infoHash, peerId, extensions) {
+  // Name of the bittorrent-protocol extension
+  ut_metadata.prototype.name = 'ut_metadata'
+
+  ut_metadata.prototype.onHandshake = function (infoHash, peerId, extensions) {
     this._infoHash = infoHash
   }
 
-    onExtendedHandshake (handshake) {
+  ut_metadata.prototype.onExtendedHandshake = function (handshake) {
     if (!handshake.m || !handshake.m.ut_metadata) {
       return this.emit('warning', new Error('Peer does not support ut_metadata'))
     }
     if (!handshake.metadata_size) {
       return this.emit('warning', new Error('Peer does not have metadata'))
     }
-      if (typeof handshake.metadata_size !== 'number' ||
+
-          MAX_METADATA_SIZE < handshake.metadata_size ||
+    if (handshake.metadata_size > MAX_METADATA_SIZE) {
-          handshake.metadata_size <= 0) {
+      return this.emit('warning', new Error('Peer gave maliciously large metadata size'))
-        return this.emit('warning', new Error('Peer gave invalid metadata size'))
     }
 
     this._metadataSize = handshake.metadata_size
     this._numPieces = Math.ceil(this._metadataSize / PIECE_LENGTH)
     this._remainingRejects = this._numPieces * 2
 
+    if (this._fetching) {
       this._requestPieces()
     }
+  }
 
-    onMessage (buf) {
+  ut_metadata.prototype.onMessage = function (buf) {
-      let dict
+    var dict, trailer
-      let trailer
     try {
-        const str = buf.toString()
+      var str = buf.toString()
-        const trailerIndex = str.indexOf('ee') + 2
+      var trailerIndex = str.indexOf('ee') + 2
       dict = bencode.decode(str.substring(0, trailerIndex))
       trailer = buf.slice(trailerIndex)
     } catch (err) {
@@ -92,7 +95,7 @@ module.exports = metadata => {
    * Ask the peer to send metadata.
    * @public
    */
-    fetch () {
+  ut_metadata.prototype.fetch = function () {
     if (this._metadataComplete) {
       return
     }
@@ -106,17 +109,17 @@ module.exports = metadata => {
    * Stop asking the peer to send metadata.
    * @public
    */
-    cancel () {
+  ut_metadata.prototype.cancel = function () {
     this._fetching = false
   }
 
-    setMetadata (metadata) {
+  ut_metadata.prototype.setMetadata = function (metadata) {
     if (this._metadataComplete) return true
     debug('set metadata')
 
     // if full torrent dictionary was passed in, pull out just `info` key
     try {
-        const info = bencode.decode(metadata).info
+      var info = bencode.decode(metadata).info
       if (info) {
         metadata = bencode.encode(info)
       }
@@ -134,53 +137,51 @@ module.exports = metadata => {
     this._metadataSize = this.metadata.length
     this._wire.extendedHandshake.metadata_size = this._metadataSize
 
-      this.emit('metadata', bencode.encode({
+    this.emit('metadata', bencode.encode({ info: bencode.decode(this.metadata) }))
-        info: bencode.decode(this.metadata)
-      }))
 
     return true
   }
 
-    _send (dict, trailer) {
+  ut_metadata.prototype._send = function (dict, trailer) {
-      let buf = bencode.encode(dict)
+    var buf = bencode.encode(dict)
     if (Buffer.isBuffer(trailer)) {
       buf = Buffer.concat([buf, trailer])
     }
     this._wire.extended('ut_metadata', buf)
   }
 
-    _request (piece) {
+  ut_metadata.prototype._request = function (piece) {
-      this._send({ msg_type: 0, piece })
+    this._send({ msg_type: 0, piece: piece })
   }
 
-    _data (piece, buf, totalSize) {
+  ut_metadata.prototype._data = function (piece, buf, totalSize) {
-      const msg = { msg_type: 1, piece }
+    var msg = { msg_type: 1, piece: piece }
     if (typeof totalSize === 'number') {
       msg.total_size = totalSize
     }
     this._send(msg, buf)
   }
 
-    _reject (piece) {
+  ut_metadata.prototype._reject = function (piece) {
-      this._send({ msg_type: 2, piece })
+    this._send({ msg_type: 2, piece: piece })
   }
 
-    _onRequest (piece) {
+  ut_metadata.prototype._onRequest = function (piece) {
     if (!this._metadataComplete) {
       this._reject(piece)
       return
     }
-      const start = piece * PIECE_LENGTH
+    var start = piece * PIECE_LENGTH
-      let end = start + PIECE_LENGTH
+    var end = start + PIECE_LENGTH
     if (end > this._metadataSize) {
       end = this._metadataSize
     }
-      const buf = this.metadata.slice(start, end)
+    var buf = this.metadata.slice(start, end)
     this._data(piece, buf, this._metadataSize)
   }
 
-    _onData (piece, buf, totalSize) {
+  ut_metadata.prototype._onData = function (piece, buf, totalSize) {
-      if (buf.length > PIECE_LENGTH || !this._fetching) {
+    if (buf.length > PIECE_LENGTH) {
       return
     }
     buf.copy(this.metadata, piece * PIECE_LENGTH)
@@ -188,10 +189,9 @@ module.exports = metadata => {
     this._checkDone()
   }
 
-    _onReject (piece) {
+  ut_metadata.prototype._onReject = function (piece) {
     if (this._remainingRejects > 0 && this._fetching) {
-        // If we haven't been rejected too much,
+      // If we haven't been rejected too much, then try to request the piece again
-        // then try to request the piece again
       this._request(piece)
       this._remainingRejects -= 1
     } else {
@@ -199,17 +199,17 @@ module.exports = metadata => {
     }
   }
 
-    _requestPieces () {
+  ut_metadata.prototype._requestPieces = function () {
-      if (!this._fetching) return
+    this.metadata = new Buffer(this._metadataSize)
-      this.metadata = Buffer.alloc(this._metadataSize)
+
-      for (let piece = 0; piece < this._numPieces; piece++) {
+    for (var piece = 0; piece < this._numPieces; piece++) {
       this._request(piece)
     }
   }
 
-    _checkDone () {
+  ut_metadata.prototype._checkDone = function () {
-      let done = true
+    var done = true
-      for (let piece = 0; piece < this._numPieces; piece++) {
+    for (var piece = 0; piece < this._numPieces; piece++) {
       if (!this._bitfield.get(piece)) {
         done = false
         break
@@ -218,14 +218,14 @@ module.exports = metadata => {
     if (!done) return
 
     // attempt to set metadata -- may fail sha1 check
-      const success = this.setMetadata(this.metadata)
+    var success = this.setMetadata(this.metadata)
 
     if (!success) {
       this._failedMetadata()
     }
   }
 
-    _failedMetadata () {
+  ut_metadata.prototype._failedMetadata = function () {
     // reset bitfield & try again
     this._bitfield = new BitField(0, { grow: BITFIELD_GROW })
     this._remainingRejects -= this._numPieces
@@ -235,10 +235,6 @@ module.exports = metadata => {
       this.emit('warning', new Error('Peer sent invalid metadata'))
     }
   }
-  }
 
-  // Name of the bittorrent-protocol extension
+  return ut_metadata
-  utMetadata.prototype.name = 'ut_metadata'
-
-  return utMetadata
 }

package.json

@@ -1,29 +1,32 @@
 {
   "name": "ut_metadata",
   "description": "Extension for Peers to Send Metadata Files (BEP 9)",
-  "version": "3.5.2",
+  "version": "3.0.4",
   "author": {
-    "name": "WebTorrent LLC",
+    "name": "Feross Aboukhadijeh",
-    "email": "feross@webtorrent.io",
+    "email": "feross@feross.org",
-    "url": "https://webtorrent.io"
+    "url": "http://feross.org/"
   },
   "bugs": {
-    "url": "https://github.com/webtorrent/ut_metadata/issues"
+    "url": "https://github.com/feross/ut_metadata/issues"
   },
   "dependencies": {
-    "bencode": "^2.0.1",
+    "bencode": "^0.7.0",
-    "bitfield": "^4.0.0",
+    "bitfield": "^1.0.1",
-    "debug": "^4.2.0",
+    "debug": "^2.2.0",
-    "simple-sha1": "^3.0.1"
+    "inherits": "^2.0.1",
+    "simple-sha1": "^2.0.0"
   },
   "devDependencies": {
-    "bittorrent-protocol": "^3.1.2",
+    "bittorrent-protocol": "^2.0.0",
-    "brfs": "^2.0.2",
+    "brfs": "^1.2.0",
-    "standard": "*",
+    "standard": "^6.0.4",
-    "tape": "^5.0.1",
+    "tape": "^4.0.0",
-    "webtorrent-fixtures": "^1.7.3"
+    "webtorrent-fixtures": "^1.3.0",
+    "zuul": "^3.8.0"
   },
   "keywords": [
+    "9",
     "Extension for Peers to Send Metadata Files",
     "bep",
     "bep 9",
@@ -38,23 +41,12 @@
   "main": "index.js",
   "repository": {
     "type": "git",
-    "url": "git://github.com/webtorrent/ut_metadata.git"
+    "url": "git://github.com/feross/ut_metadata.git"
   },
   "scripts": {
-    "test": "standard && tape test/*.js"
+    "test": "standard && npm run test-node && npm run test-browser",
-  },
+    "test-browser": "zuul -- test/*.js",
-  "funding": [
+    "test-browser-local": "zuul --local -- test/*.js",
-    {
+    "test-node": "tape test/*.js"
-      "type": "github",
-      "url": "https://github.com/sponsors/feross"
-    },
-    {
-      "type": "patreon",
-      "url": "https://www.patreon.com/feross"
-    },
-    {
-      "type": "consulting",
-      "url": "https://feross.org/support"
   }
-  ]
 }

test/basic.js

@@ -1,14 +1,14 @@
-const { leavesMetadata } = require('webtorrent-fixtures')
+var bencode = require('bencode')
-const bencode = require('bencode')
+var fixtures = require('webtorrent-fixtures')
-const Protocol = require('bittorrent-protocol')
+var Protocol = require('bittorrent-protocol')
-const test = require('tape')
+var test = require('tape')
-const utMetadata = require('../')
+var ut_metadata = require('../')
 
-test('wire.use(utMetadata())', t => {
+test('wire.use(ut_metadata())', function (t) {
-  const wire = new Protocol()
+  var wire = new Protocol()
   wire.pipe(wire)
 
-  wire.use(utMetadata())
+  wire.use(ut_metadata())
 
   t.ok(wire.ut_metadata)
   t.ok(wire.ut_metadata.fetch)
@@ -17,18 +17,15 @@ test('wire.use(utMetadata())', t => {
   t.end()
 })
 
-test('wire.use(utMetadata(metadata))', t => {
+test('wire.use(ut_metadata(metadata))', function (t) {
-  const wire = new Protocol()
+  var wire = new Protocol()
   wire.pipe(wire)
 
-  wire.use(utMetadata(leavesMetadata.torrent))
+  wire.use(ut_metadata(fixtures.leavesMetadata.torrent))
 
   t.ok(wire.ut_metadata)
   t.ok(wire.ut_metadata.fetch)
   t.ok(wire.ut_metadata.cancel)
-  t.equal(
+  t.equal(wire.ut_metadata.metadata.toString('hex'), bencode.encode(bencode.decode(fixtures.leavesMetadata.torrent).info).toString('hex'))
-    wire.ut_metadata.metadata.toString('hex'),
-    bencode.encode(bencode.decode(leavesMetadata.torrent).info).toString('hex')
-  )
   t.end()
 })

test/fetch.js

@@ -1,39 +1,34 @@
-const { leavesMetadata, sintel } = require('webtorrent-fixtures')
+var bencode = require('bencode')
-const bencode = require('bencode')
+var fixtures = require('webtorrent-fixtures')
-const Protocol = require('bittorrent-protocol')
+var Protocol = require('bittorrent-protocol')
-const test = require('tape')
+var test = require('tape')
-const utMetadata = require('../')
+var ut_metadata = require('../')
 
-const id1 = Buffer.from('01234567890123456789')
+var id1 = new Buffer('01234567890123456789')
-const id2 = Buffer.from('12345678901234567890')
+var id2 = new Buffer('12345678901234567890')
 
-test('fetch()', t => {
+test('fetch()', function (t) {
   t.plan(3)
 
-  const wire1 = new Protocol()
+  var wire1 = new Protocol()
-  const wire2 = new Protocol()
+  var wire2 = new Protocol()
   wire1.pipe(wire2).pipe(wire1)
 
-  wire1.use(utMetadata(leavesMetadata.torrent)) // wire1 already has metadata
+  wire1.use(ut_metadata(fixtures.leavesMetadata.torrent)) // wire1 already has metadata
-  wire2.use(utMetadata()) // wire2 does not
+  wire2.use(ut_metadata()) // wire2 does not
 
   wire2.ut_metadata.fetch()
 
-  wire2.ut_metadata.on('metadata', _metadata => {
+  wire2.ut_metadata.on('metadata', function (_metadata) {
     // got metadata!
-    t.equal(
+    t.equal(_metadata.toString('hex'), bencode.encode({ info: bencode.decode(fixtures.leavesMetadata.torrent).info }).toString('hex'))
-      _metadata.toString('hex'),
-      bencode.encode({
-        info: bencode.decode(leavesMetadata.torrent).info
-      }).toString('hex')
-    )
   })
 
-  wire2.on('handshake', (infoHash, peerId, extensions) => {
+  wire2.on('handshake', function (infoHash, peerId, extensions) {
-    wire2.handshake(leavesMetadata.parsedTorrent.infoHash, id2)
+    wire2.handshake(fixtures.leavesMetadata.parsedTorrent.infoHash, id2)
   })
 
-  wire2.on('extended', ext => {
+  wire2.on('extended', function (ext) {
     if (ext === 'handshake') {
       t.pass('got extended handshake')
     } else if (ext === 'ut_metadata') {
@@ -46,40 +41,40 @@ test('fetch()', t => {
     }
   })
 
-  wire1.handshake(leavesMetadata.parsedTorrent.infoHash, id1)
+  wire1.handshake(fixtures.leavesMetadata.parsedTorrent.infoHash, id1)
 })
 
-test('fetch() from peer without metadata', t => {
+test('fetch() from peer without metadata', function (t) {
   t.plan(2)
 
-  const wire1 = new Protocol()
+  var wire1 = new Protocol()
-  const wire2 = new Protocol()
+  var wire2 = new Protocol()
   wire1.pipe(wire2).pipe(wire1)
 
-  wire1.use(utMetadata()) // neither wire has metadata
+  wire1.use(ut_metadata()) // neither wire has metadata
-  wire2.use(utMetadata())
+  wire2.use(ut_metadata())
 
   wire2.ut_metadata.fetch()
 
-  wire2.ut_metadata.on('metadata', () => {
+  wire2.ut_metadata.on('metadata', function () {
     t.fail('No "metadata" event should fire')
   })
 
-  wire1.ut_metadata.onMessage = () => {
+  wire1.ut_metadata.onMessage = function () {
     t.fail('No messages should be sent to wire1')
-    // No messages should be sent because wire1 never sent metadata_size
+    // No messages should be sent because wire1 never sent metadata_size in the
-    // in the extended handshake, so he doesn't have metadata
+    // extended handshake, so he doesn't have metadata
   }
 
-  wire2.ut_metadata.on('warning', () => {
+  wire2.ut_metadata.on('warning', function () {
     t.pass('got warning about peer missing metadata')
   })
 
-  wire2.on('handshake', (infoHash, peerId, extensions) => {
+  wire2.on('handshake', function (infoHash, peerId, extensions) {
-    wire2.handshake(leavesMetadata.parsedTorrent.infoHash, id2)
+    wire2.handshake(fixtures.leavesMetadata.parsedTorrent.infoHash, id2)
   })
 
-  wire2.on('extended', ext => {
+  wire2.on('extended', function (ext) {
     if (ext === 'handshake') {
       t.pass('got extended handshake')
     } else if (ext === 'ut_metadata') {
@@ -89,44 +84,36 @@ test('fetch() from peer without metadata', t => {
     }
   })
 
-  wire1.handshake(leavesMetadata.parsedTorrent.infoHash, id1)
+  wire1.handshake(fixtures.leavesMetadata.parsedTorrent.infoHash, id1)
 })
 
-test('fetch when peer gets metadata later (setMetadata)', t => {
+test('fetch when peer gets metadata later (setMetadata)', function (t) {
   t.plan(3)
 
-  const wire1 = new Protocol()
+  var wire1 = new Protocol()
-  const wire2 = new Protocol()
+  var wire2 = new Protocol()
-
   wire1.pipe(wire2).pipe(wire1)
 
-  wire1.use(utMetadata()) // wire1 starts without metadata
+  wire1.use(ut_metadata()) // wire1 starts without metadata
 
-  process.nextTick(() => {
+  process.nextTick(function () {
-    // wire1 gets metadata later
+    wire1.ut_metadata.setMetadata(fixtures.leavesMetadata.torrent) // wire1 gets metadata later
-    wire1.ut_metadata.setMetadata(leavesMetadata.torrent)
 
-    process.nextTick(() => {
+    process.nextTick(function () {
-      // wire2 does not start with metadata,
+      // wire2 does not start with metadata, but connects to wire1 after it gets metadata
-      // but connects to wire1 after it gets metadata
+      wire2.use(ut_metadata())
-      wire2.use(utMetadata())
       wire2.ut_metadata.fetch()
 
-      wire2.ut_metadata.on('metadata', _metadata => {
+      wire2.ut_metadata.on('metadata', function (_metadata) {
         // got metadata!
-        t.equal(
+        t.equal(_metadata.toString('hex'), bencode.encode({ info: bencode.decode(fixtures.leavesMetadata.torrent).info }).toString('hex'))
-          _metadata.toString('hex'),
-          bencode.encode({
-            info: bencode.decode(leavesMetadata.torrent).info
-          }).toString('hex')
-        )
       })
 
-      wire2.on('handshake', (infoHash, peerId, extensions) => {
+      wire2.on('handshake', function (infoHash, peerId, extensions) {
-        wire2.handshake(leavesMetadata.parsedTorrent.infoHash, id2)
+        wire2.handshake(fixtures.leavesMetadata.parsedTorrent.infoHash, id2)
       })
 
-      wire2.on('extended', ext => {
+      wire2.on('extended', function (ext) {
         if (ext === 'handshake') {
           t.pass('got extended handshake')
         } else if (ext === 'ut_metadata') {
@@ -139,43 +126,37 @@ test('fetch when peer gets metadata later (setMetadata)', t => {
         }
       })
 
-      wire1.handshake(leavesMetadata.parsedTorrent.infoHash, id1)
+      wire1.handshake(fixtures.leavesMetadata.parsedTorrent.infoHash, id1)
     })
   })
 })
 
-test('fetch() large torrent', t => {
+test('fetch() large torrent', function (t) {
   t.plan(4)
 
-  const wire1 = new Protocol()
+  var wire1 = new Protocol()
-  const wire2 = new Protocol()
+  var wire2 = new Protocol()
   wire1.pipe(wire2).pipe(wire1)
 
-  wire1.use(utMetadata(sintel.torrent)) // wire1 already has metadata
+  wire1.use(ut_metadata(fixtures.sintel.torrent)) // wire1 already has metadata
-  wire2.use(utMetadata()) // wire2 does not
+  wire2.use(ut_metadata()) // wire2 does not
 
   wire2.ut_metadata.fetch()
 
-  wire2.ut_metadata.on('metadata', _metadata => {
+  wire2.ut_metadata.on('metadata', function (_metadata) {
     // got metadata!
-    t.equal(
+    t.equal(_metadata.toString('hex'), bencode.encode({ info: bencode.decode(fixtures.sintel.torrent).info }).toString('hex'))
-      _metadata.toString('hex'),
-      bencode.encode({
-        info: bencode.decode(sintel.torrent).info
-      }).toString('hex')
-    )
   })
 
-  wire2.on('handshake', (infoHash, peerId, extensions) => {
+  wire2.on('handshake', function (infoHash, peerId, extensions) {
-    wire2.handshake(sintel.parsedTorrent.infoHash, id2)
+    wire2.handshake(fixtures.sintel.parsedTorrent.infoHash, id2)
   })
 
-  wire2.on('extended', ext => {
+  wire2.on('extended', function (ext) {
     if (ext === 'handshake') {
       t.pass('got extended handshake')
     } else if (ext === 'ut_metadata') {
-      // note: this should get called twice,
+      // note: this should get called twice, once for each block of the sintel metadata
-      // once for each block of the sintel metadata
       t.pass('got extended ut_metadata message')
 
       // this is emitted for consistency's sake, but it's ignored
@@ -186,66 +167,35 @@ test('fetch() large torrent', t => {
     }
   })
 
-  wire1.handshake(sintel.parsedTorrent.infoHash, id1)
+  wire1.handshake(fixtures.sintel.parsedTorrent.infoHash, id1)
 })
 
-test('discard invalid metadata', t => {
+test('discard invalid metadata', function (t) {
   t.plan(1)
 
-  const wire1 = new Protocol()
+  var wire1 = new Protocol()
-  const wire2 = new Protocol()
+  var wire2 = new Protocol()
   wire1.pipe(wire2).pipe(wire1)
 
-  const invalidMetadata = leavesMetadata.torrent.slice(0)
+  var invalidMetadata = fixtures.leavesMetadata.torrent.slice(0)
   invalidMetadata[55] = 65 // mess up a byte in the info block
 
-  wire1.use(utMetadata(invalidMetadata))
+  wire1.use(ut_metadata(invalidMetadata))
-  wire2.use(utMetadata())
+  wire2.use(ut_metadata())
 
   wire2.ut_metadata.fetch()
 
-  wire2.ut_metadata.on('metadata', () => {
+  wire2.ut_metadata.on('metadata', function () {
     t.fail('No "metadata" event should fire')
   })
 
-  wire2.ut_metadata.on('warning', () => {
+  wire2.ut_metadata.on('warning', function () {
     t.pass('got warning because peer sent reject too much')
   })
 
-  wire2.on('handshake', (infoHash, peerId, extensions) => {
+  wire2.on('handshake', function (infoHash, peerId, extensions) {
-    wire2.handshake(leavesMetadata.parsedTorrent.infoHash, id2)
+    wire2.handshake(fixtures.leavesMetadata.parsedTorrent.infoHash, id2)
   })
 
-  wire1.handshake(leavesMetadata.parsedTorrent.infoHash, id1)
+  wire1.handshake(fixtures.leavesMetadata.parsedTorrent.infoHash, id1)
-})
-
-test('stop receiving data after cancel', t => {
-  t.plan(1)
-
-  const wire1 = new Protocol()
-  const wire2 = new Protocol()
-
-  wire1.pipe(wire2).pipe(wire1)
-
-  wire1.use(utMetadata(sintel.torrent))
-  wire2.use(utMetadata())
-
-  wire2.ut_metadata.once('metadata', () => {
-    t.fail('No "metadata" event should fire')
-  })
-
-  wire2.once('handshake', (infoHash, peerId, extensions) => {
-    wire2.handshake(sintel.parsedTorrent.infoHash, id2)
-    wire2.ut_metadata.fetch()
-  })
-
-  wire2.on('extended', ext => {
-    if (ext === 'ut_metadata') {
-      wire2.ut_metadata.cancel()
-    }
-  })
-
-  wire1.handshake(sintel.parsedTorrent.infoHash, id1)
-
-  process.nextTick(() => t.pass('no metadata received'))
 })