chore: update readme

Late to the party, but removes dev dependency `npm-run-all` to avoid malicious package

.circleci/config.yml

@@ -0,0 +1,103 @@
+version: 2
+
+create-cache-file: &create-cache-file
+  run:
+    name: Setup cache
+    command: echo "$NODE_VERSION" > _cache_node_version
+
+package-json-cache: &package-json-cache
+  key: npm-install-{{ checksum "_cache_node_version" }}-{{ checksum "package-lock.json" }}
+
+base-build: &base-build
+  steps:
+    - checkout
+    - <<: *create-cache-file
+    - restore_cache:
+        <<: *package-json-cache
+    - run:
+        name: Install
+        command: npm install
+    - save_cache:
+        <<: *package-json-cache
+        paths:
+          - node_modules
+    - run:
+        name: Lint
+        command: npm run verify -- --silent
+    - run:
+        name: Test
+        command: npm run test:once
+
+jobs:
+  test_node_10:
+    docker:
+      - image: circleci/node:10
+    environment:
+      - NODE_VERSION: 10
+    <<: *base-build
+
+  test_node_8:
+    docker:
+      - image: circleci/node:8
+    environment:
+      - NODE_VERSION: 8
+    <<: *base-build
+
+  test_node_6:
+    docker:
+      - image: circleci/node:6
+    environment:
+      - NODE_VERSION: 6
+    <<: *base-build
+
+  release:
+    docker:
+      - image: circleci/node:8
+    environment:
+      - NODE_VERSION: 8
+    steps:
+      - checkout
+      - <<: *create-cache-file
+      - restore_cache:
+          <<: *package-json-cache
+      - deploy:
+          name: Semantic Release
+          command: |
+            npm run semantic-release
+
+workflows:
+  version: 2
+  test_and_tag:
+    jobs:
+      - test_node_10:
+          filters:
+            branches:
+              only: master
+      - test_node_8:
+          filters:
+            branches:
+              only: master
+      - test_node_6:
+          filters:
+            branches:
+              only: master
+      - release:
+          requires:
+            - test_node_6
+            - test_node_8
+            - test_node_10
+
+  build_and_test:
+    jobs:
+      - test_node_10:
+          filters:
+            branches:
+              ignore: master
+      - test_node_8:
+          filters:
+            branches:
+              ignore: master
+      - test_node_6:
+          filters:
+            branches:
+              ignore: master

.env

@@ -1,2 +0,0 @@
-FTP_URL=ftp://127.0.0.1:8880
-PASV_RANGE=8881

.gitattributes

@@ -0,0 +1 @@
+package-lock.json binary

.gitignore

@@ -3,4 +3,5 @@ node_modules/
 dist/
 reports/
 npm-debug.log
-.nyc_output
+.nyc_output/
+test_tmp/

.nycrc

@@ -1,24 +0,0 @@
-{
-    "check-coverage": true,
-    "per-file": true,
-    "lines": 40,
-    "statements": 40,
-    "functions": 20,
-    "branches": 40,
-    "include": [
-      "src/**/*.js"
-    ],
-    "exclude": [
-      "test/**/*.spec.js"
-    ],
-    "reporter": [
-      "lcovonly",
-      "html",
-      "text",
-      "cobertura",
-      "json"
-    ],
-    "cache": true,
-    "all": true,
-    "report-dir": "./reports/coverage/"
-}

.travis.yml

@@ -1,25 +0,0 @@
-language: node_js
-node_js:
-  - "6"
-  # - "node"
-
-env:
-  FTP_URL: ftp://127.0.0.1:8880
-  PASV_RANGE: 8881
-
-install: npm install
-
-script:
-  - npm run verify:js
-  - npm run test:coverage
-
-after_script:
-  - npm run upload-coverage
-
-deploy:
-  skip_cleanup: true
-  provider: script
-  script: npm run semantic-release
-  on:
-    branch: master
-    node: "6"

CONTRIBUTING.md

@@ -1,211 +1,20 @@
-<!--[CN_HEADING]-->
+<p align="center">
-# Contributing
+  <a href="https://github.com/trs/ftp-srv">
+    <img alt="ftp-srv" src="logo.png" width="400px"  />
+  </a>
+</p>
 
-Welcome! This document explains how you can contribute to making **ftp-srv** even better.
+<h1 align="center">
+  Contributing Guide
+</h1>
 
+## Welcome
 
-<!--[]-->
+- Thank you for your eagerness to contribute, pull requests are encouraged!
-
-<!--[CN_GETTING_STARTED]-->
-# Getting Started
-
-## Installation
-
-```
-git clone <this repo>
-npm install -g commitizen
-npm install -g semantic-release-cli
-npm install
-```
-
-
-<!--[]-->
-
-<!--[RM_DIR_STRUCTURE]-->
-## Directory Structure
-
-Code is organised into modules which contain one-or-more components. This a great way to ensure maintainable code by encapsulation of behavior logic. A component is basically a self contained app usually in a single file or a folder with each concern as a file: style, template, specs, e2e, and component class. Here's how it looks:
-```
-ftp-srv/
- ├──config/                       * configuration files live here (e.g. eslint, verify, testUnit)
- │
- ├──src/                          * source code files should be here
- │
- ├──dist/                         * production-build code should live here
- │
- ├──reports/                      * test reports appear here
- │
- ├──test/                         * unit test specifications live here
- │
- ├──confit.yml                    * the project config file generated by 'yo confit'
- ├──CONTRIBUTING.md               * how to contribute to the project
- ├──README.md                     * this file
- └──package.json                  * NPM package description file
-```
-
-
-<!--[]-->
-
-<!--[CN_GITFLOW_PROCESS]-->
-# GitFlow Development Process
-
-This project uses the [GitHub Flow](https://guides.github.com/introduction/flow/index.html) workflow.
-
-## Create a branch
-When you're working on a project, you're going to have a bunch of different features or ideas in progress at any given time – some of which are ready to go, and others which are not. Branching exists to help you manage this workflow.
-
-When you create a branch in your project, you're creating an environment where you can try out new ideas. Changes you make on a branch don't affect the `master` branch, so you're free to experiment and commit changes, safe in the knowledge that your branch won't be merged until it's ready to be reviewed by someone you're collaborating with.
-
-###ProTip
-
-Branching is a core concept in Git, and the entire GitHub Flow is based upon it. There's only one rule: anything in the `master` branch is always deployable.
-
-Because of this, it's extremely important that your new branch is created off of `master` when working on a feature or a fix. Your branch name should be descriptive (e.g., `refactor-authentication`, `user-content-cache-key`, `make-retina-avatars`), so that others can see what is being worked on.
-
-## Add commits
-Once your branch has been created, it's time to start making changes. Whenever you add, edit, or delete a file, you're making a commit, and adding them to your branch. This process of adding commits keeps track of your progress as you work on a feature branch.
-
-Commits also create a transparent history of your work that others can follow to understand what you've done and why. Each commit has an associated commit message, which is a description explaining why a particular change was made. Furthermore, each commit is considered a separate unit of change. This lets you roll back changes if a bug is found, or if you decide to head in a different direction.
-
-###ProTip
-
-Commit messages are important, especially since Git tracks your changes and then displays them as commits once they're pushed to the server. By writing clear commit messages, you can make it easier for other people to follow along and provide feedback.
-
-## Open a pull request
-
-Pull Requests initiate discussion about your commits. Because they're tightly integrated with the underlying Git repository, anyone can see exactly what changes would be merged if they accept your request.
-
-You can open a Pull Request at any point during the development process: when you have little or no code but want to share some screenshots or general ideas, when you're stuck and need help or advice, or when you're ready for someone to review your work. By using GitHub's @mention system in your Pull Request message, you can ask for feedback from specific people or teams, whether they're down the hall or ten time zones away.
-
-###ProTip
-
-Pull Requests are useful for contributing to open source projects and for managing changes to shared repositories. If you're using a Fork & Pull Model, Pull Requests provide a way to notify project maintainers about the changes you'd like them to consider. If you're using a Shared Repository Model, Pull Requests help start code review and conversation about proposed changes before they're merged into the `master` branch.
-
-## Discuss and review your code
-Once a Pull Request has been opened, the person or team reviewing your changes may have questions or comments. Perhaps the coding style doesn't match project guidelines, the change is missing unit tests, or maybe everything looks great and props are in order. Pull Requests are designed to encourage and capture this type of conversation.
-
-You can also continue to push to your branch in light of discussion and feedback about your commits. If someone comments that you forgot to do something or if there is a bug in the code, you can fix it in your branch and push up the change. GitHub will show your new commits and any additional feedback you may receive in the unified Pull Request view.
-
-###ProTip
-
-Pull Request comments are written in Markdown, so you can embed images and emoji, use pre-formatted text blocks, and other lightweight formatting.
-
-## Merge to `master`
-
-Once your PR has passed any the integration tests and received approval to merge, it is time to merge your code into the `master` branch.
-
-Once merged, Pull Requests preserve a record of the historical changes to your code. Because they're searchable, they let anyone go back in time to understand why and how a decision was made.
-
-###ProTip
-
-By incorporating certain keywords into the text of your Pull Request, you can associate issues with code. When your Pull Request is merged, the related issues are also closed. For example, entering the phrase Closes #32 would close issue number 32 in the repository. For more information, check out our help article.
-
-
-<!--[]-->
-
-<!--[CN_BUILD_TASKS]-->
-## Build Tasks
-
-Command | Description
-:------ | :----------
-<pre>npm run build</pre> | Generate production build into [dist/](dist/) folder
-<pre>npm run dev</pre> | Run project in development mode (verify code, and re-verify when code is changed)
-<pre>npm start</pre> | Alias for `npm run dev` task
-
-
-
-<!--[]-->
-
-<!--[CN_TEST_TASKS]-->
-## Test Tasks
-
-Command | Description
-:------ | :----------
-<pre>npm test</pre> | Alias for `npm run test:unit` task
-<pre>npm run test:coverage</pre> | Run instrumented unit tests then verify coverage meets defined thresholds<ul><li>Returns non-zero exit code when coverage does not meet thresholds (as defined in istanbul.js)</li></ul>
-<pre>npm run test:unit</pre> | Run unit tests whenever JS source or tests change<ul><li>Uses Mocha</li><li>Code coverage</li><li>Runs continuously (best to run in a separate window)</li></ul>
-<pre>npm run test:unit:once</pre> | Run unit tests once<ul><li>Uses Mocha</li><li>Code coverage</li></ul>
-
-
-
-<!--[]-->
-
-<!--[CN_VERIFY_TASKS]-->
-## Verification (Linting) Tasks
-
-Command | Description
-:------ | :----------
-<pre>npm run verify</pre> | Verify code style and syntax<ul><li>Verifies source *and test code* aginst customisable rules (unlike Webpack loaders)</li></ul>
-<pre>npm run verify:js</pre> | Verify Javascript code style and syntax
-<pre>npm run verify:js:fix</pre> | Verify Javascript code style and syntax and fix any errors that can be fixed automatically
-<pre>npm run verify:js:watch</pre> | Verify Javascript code style and syntax and watch files for changes
-<pre>npm run verify:watch</pre> | Runs verify task whenever JS or CSS code is changed
-
-
-
-<!--[]-->
-
-<!--[CN_COMMIT_TASKS]-->
-## Commit Tasks
-
-Command | Description
-:------ | :----------
-<pre>git status</pre> | Lists the current branch and the status of changed files
-<pre>git log</pre> | Displays the commit log (press Q to quit viewing)
-<pre>git add .</pre> | Stages all modified & untracked files, ready to be committed
-<pre>git cz</pre> | Commit changes to local repository using Commitizen.<ul><li>Asks questions about the change to generate a valid conventional commit message</li><li>Can be customised by modifying [config/release/commitMessageConfig.js](config/release/commitMessageConfig.js)</li></ul>
-<pre>git push</pre> | Push local repository changes to remote repository
-
-
-<!--[]-->
-
-<!--[CN_DOCUMENTATION_TASKS]-->
-
-
-
-<!--[]-->
-
-<!--[CN_RELEASE_TASKS]-->
-## Release Tasks
-
-Command | Description
-:------ | :----------
-<pre>npm run commitmsg</pre> | Git commit message hook that validates the commit message conforms to your commit message conventions.
-<pre>npm run pre-release</pre> | Verify code, run unit tests, check test coverage, build software. This task is designed to be run before
-the `semantic-release` task.
-<ul><li>Run `semantic-release-cli setup` once you have a remote repository. See https://github.com/semantic-release/cli for details.</li><li>Semantic-release integrates with Travis CI (or similar tools) to generate release notes
-for each release (which appears in the "Releases" section in GitHub) and
-publishes the package to NPM (when all the tests are successful) with a semantic version number.
-</li></ul>
-<pre>npm run prepush</pre> | Git pre-push hook that verifies code and checks unit test coverage meet minimum thresholds.
-<pre>npm run upload-coverage</pre> | Uploads code-coverage metrics to Coveralls.io<ul><li>Setup - https://coveralls.zendesk.com/hc/en-us/articles/201347419-Coveralls-currently-supports</li><li>Define an environment variable called COVERALLS_REPO_TOKEN in your build environment with the repo token from https://coveralls.io/github/<repo-name>/settings</li><li>In your CI configuration (e.g. `travis.yml`), call `npm run upload-coverage` if the build is successful.</li></ul>
-
-
-
-<!--[]-->
-
-
-<!--[CN_CHANGING_BUILD_TOOL_CONFIG]-->
-## Changing build-tool configuration
-
-There are 3 ways you can change the build-tool configuration for this project:
-
-1. BEST: Modify the Confit configuration file ([confit.yml](confit.yml)) by hand, then re-run `yo confit` and tell it to use the existing configuration.
-1. OK: Re-run `yo confit` and provide new answers to the questions. **Confit will attempt to overwrite your existing configuration (it will prompt for confirmation), so make sure you have committed your code to a source control (e.g. git) first**.
-  There are certain configuration settings which can **only** be specified by hand, in which case the first approach is still best.
-1. RISKY: Modify the generated build-tool config by hand. Be aware that if you re-run `yo confit` it will attempt to overwrite your changes. So commit your changes to source control first.
-
-Additionally, the **currently-generated** configuration can be extended in the following ways:
-
-- The task configuration is defined in [package.json](package.json). It is possible to change the task definitions to add your own sub-tasks.
-You can also use the `pre...` and `post...` script-name prefixes to run commands before (pre) and after (post) the generated commands.
-
-- The `entryPoint.entryPoints` string in [confit.yml](confit.yml) is designed to be edited manually. It represents the starting-point(s) of the application (like a `main()` function). A NodeJS application has one entry point. E.g. `src/index.js`
-
-
-
-
-<!--[]-->
-
 
+## Guidelines
 
+- Any new fixes are features should include new or updated [tests](/test).
+- Commits follow the [AngularJS Git Commit Message Conventions](https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJygNPiHORgU1_OOAqWjiDU5Y/edit), please review and commit accordingly
+- Submit your pull requests to the `master` branch, these will normally be merged into a seperate branch for any finally changes before being merged into `master`.
+- Submit any bugs or requests to the issues page in Github.

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2017 Tyler Stewart
+Copyright (c) 2018 Tyler Stewart
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,12 +1,23 @@
-[![ftp-srv](logo.png)](https://github.com/trs/ftp-srv)
+<p align="center">
+  <a href="https://github.com/trs/ftp-srv">
+    <img alt="ftp-srv" src="logo.png" width="600px"  />
+  </a>
+</p>
 
-<!--[RM_DESCRIPTION]-->
-> Modern, extensible FTP Server
 
-<!--[]-->
+<p align="center">
+  Modern, extensible FTP Server
+</p>
 
-[![npm version](https://badge.fury.io/js/ftp-srv.svg)](https://badge.fury.io/js/ftp-srv) [![Build Status](https://travis-ci.org/trs/ftp-srv.svg?branch=master)](https://travis-ci.org/trs/ftp-srv)
+<p align="center">
-[![Coverage Status](https://coveralls.io/repos/github/trs/ftp-srv/badge.svg?branch=coveralls)](https://coveralls.io/github/trs/ftp-srv?branch=coveralls)  [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release) [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)
+  <a href="https://www.npmjs.com/package/ftp-srv">
+    <img alt="npm" src="https://img.shields.io/npm/dm/ftp-srv.svg?style=for-the-badge" />
+  </a>
+
+  <a href="https://circleci.com/gh/trs/workflows/ftp-srv/tree/master">
+    <img alt="circleci" src="https://img.shields.io/circleci/project/github/trs/ftp-srv/master.svg?style=for-the-badge" />
+  </a>
+</p>
 
 ---
 
@@ -15,6 +26,7 @@
 - [Install](#install)
 - [Usage](#usage)
   - [API](#api)
+  - [CLI](#cli)
   - [Events](#events)
   - [Supported Commands](#supported-commands)
   - [File System](#file-system)
@@ -24,13 +36,16 @@
 ## Overview
 `ftp-srv` is a modern and extensible FTP server designed to be simple yet configurable.
 
+You can use `ftp-srv` to traverse the file system on the server, but it's biggest strength comes from it's customizable file system. This allows you to serve a custom, dynamic, or unique file system to users. You can even server a different system depending on the user connecting.
+
 ## Features
 - Extensible [file systems](#file-system) per connection
 - Passive and active transfers
 - [Explicit](https://en.wikipedia.org/wiki/FTPS#Explicit) & [Implicit](https://en.wikipedia.org/wiki/FTPS#Implicit) TLS connections
+- Promise based API
 
 ## Install
-`npm install ftp-srv --save`  
+`npm install ftp-srv --save`
 
 ## Usage
 
@@ -38,7 +53,7 @@
 // Quick start
 
 const FtpSrv = require('ftp-srv');
-const ftpServer = new FtpSrv('ftp://0.0.0.0:9876', { options ... });
+const ftpServer = new FtpSrv({ options ... });
 
 ftpServer.on('login', (data, resolve, reject) => { ... });
 ...
@@ -49,49 +64,57 @@ ftpServer.listen()
 
 ## API
 
-### `new FtpSrv(url, [{options}])`
+### `new FtpSrv({options})`
 #### url
-[URL string](https://nodejs.org/api/url.html#url_url_strings_and_url_objects) indicating the protocol, hostname, and port to listen on for connections.  
+[URL string](https://nodejs.org/api/url.html#url_url_strings_and_url_objects) indicating the protocol, hostname, and port to listen on for connections.
 Supported protocols:
 - `ftp` Plain FTP
-- `ftps` Implicit FTP over TLS  
+- `ftps` Implicit FTP over TLS
 
-_Note:_ The hostname must be the external IP address to accept external connections. Setting the hostname to `0.0.0.0` will automatically set the external IP.  
+_Note:_ The hostname must be the external IP address to accept external connections. `0.0.0.0` will listen on any available hosts for server and passive connections.  
 __Default:__ `"ftp://127.0.0.1:21"`
 
-#### options
+#### `pasv_url`
+The hostname to provide a client when attempting a passive connection (`PASV`). This defaults to the provided `url` hostname.
 
-##### `pasv_range`
+_Note:_ If set to `0.0.0.0`, this will automatically resolve to the external IP of the box.  
-A starting port (eg `8000`) or a range (eg `"8000-9000"`) to accept passive connections.  
+__Default:__ `"127.0.0.1"`
-This range is then queried for an available port to use when required.  
-__Default:__ `22`
 
-##### `greeting`
+#### `pasv_min`
+Tne starting port to accept passive connections.  
+__Default:__ `1024`
+
+#### `pasv_max`
+The ending port to accept passive connections.  
+The range is then queried for an available port to use when required.  
+__Default:__ `65535`
+
+#### `greeting`
 A human readable array of lines or string to send when a client connects.  
 __Default:__ `null`
 
-##### `tls`
+#### `tls`
 Node [TLS secure context object](https://nodejs.org/api/tls.html#tls_tls_createsecurecontext_options) used for implicit (`ftps` protocol) or explicit (`AUTH TLS`) connections.  
 __Default:__ `false`
 
-##### `anonymous`
+#### `anonymous`
 If true, will allow clients to authenticate using the username `anonymous`, not requiring a password from the user.  
 Can also set as a string which allows users to authenticate using the username provided.  
 The `login` event is then sent with the provided username and `@anonymous` as the password.  
 __Default:__ `false`
 
-##### `blacklist`
+#### `blacklist`
 Array of commands that are not allowed.  
 Response code `502` is sent to clients sending one of these commands.  
 __Example:__ `['RMD', 'RNFR', 'RNTO']` will not allow users to delete directories or rename any files.  
 __Default:__ `[]`
 
-##### `whitelist`
+#### `whitelist`
 Array of commands that are only allowed.  
 Response code `502` is sent to clients sending any other command.  
 __Default:__ `[]`
 
-##### `file_format`
+#### `file_format`
 Sets the format to use for file stat queries such as `LIST`.  
 __Default:__ `"ls"`  
 __Allowable values:__
@@ -100,16 +123,70 @@ __Allowable values:__
   - `function () {}` A custom function returning a format or promise for one.
     - Only one argument is passed in: a node [file stat](https://nodejs.org/api/fs.html#fs_class_fs_stats) object with additional file `name` parameter
 
-##### `log`
+#### `log`
 A [bunyan logger](https://github.com/trentm/node-bunyan) instance. Created by default.
 
+Piping the output into bunyan will format logs nicely, eg:  
+```
+$ node ./test/start.js | npx bunyan
+```
+
+## CLI
+
+`ftp-srv` also comes with a builtin CLI.
+
+```bash
+$ ftp-srv [url] [options]
+```
+
+```bash
+$ ftp-srv ftp://0.0.0.0:9876 --root ~/Documents
+```
+
+#### `url`
+
+Set the listening URL.
+
+Defaults to `ftp://127.0.0.1:21`
+
+#### `--root` / `-r`
+
+Set the default root directory for users.
+
+Defaults to the current directory.
+
+#### `--credentials` / `-c`
+
+Set the path to a json credentials file.
+
+Format:
+
+```js
+[
+  {
+    "username": "...",
+    "password": "...",
+    "root": "..." // Root directory
+  },
+  ...
+]
+```
+
+#### `--username`
+
+Set the username for the only user. Do not provide an argument to allow anonymous login.
+
+#### `--password`
+
+Set the password for the given `username`.
+
 ## Events
 
 The `FtpSrv` class extends the [node net.Server](https://nodejs.org/api/net.html#net_class_net_server). Some custom events can be resolved or rejected, such as `login`.
 
 ### `login`
 ```js
-on('login', {connection, username, password}, resolve, reject) => { ... }
+ftpServer.on('login', ({connection, username, password}, resolve, reject) => { ... });
 ```
 
 Occurs when a client is attempting to login. Here you can resolve the login request by username and password.
@@ -117,7 +194,7 @@ Occurs when a client is attempting to login. Here you can resolve the login requ
 `connection` [client class object](src/connection.js)  
 `username` string of username from `USER` command  
 `password` string of password from `PASS` command  
-`resolve` takes an object of arguments:
+`resolve` takes an object of arguments:  
 - `fs`
   - Set a custom file system class for this connection to use.
   - See [File System](#file-system) for implementation details.
@@ -136,15 +213,35 @@ Occurs when a client is attempting to login. Here you can resolve the login requ
 
 ### `client-error`
 ```js
-on('client-error', {connection, context, error}) => { ... }
+ftpServer.on('client-error', ({connection, context, error}) => { ... });
 ```
 
 Occurs when an error arises in the client connection.
 
 `connection` [client class object](src/connection.js)  
-`context` string of where the error occured  
+`context` string of where the error occurred  
 `error` error object
 
+### `RETR`
+```js
+connection.on('RETR', (error, filePath) => { ... });
+```
+
+Occurs when a file is downloaded.
+
+`error` if successful, will be `null`  
+`filePath` location to which file was downloaded
+
+### `STOR`
+```js
+connection.on('STOR', (error, fileName) => { ... });
+```
+
+Occurs when a file is uploaded.
+
+`error` if successful, will be `null`  
+`fileName` name of the file that was uploaded
+
 ## Supported Commands
 
 See the [command registry](src/commands/registration) for a list of all implemented FTP commands.
@@ -154,7 +251,7 @@ The default [file system](src/fs.js) can be overwritten to use your own implemen
 This can allow for virtual file systems, and more.  
 Each connection can set it's own file system based on the user.  
 
-The default file system is exported and can be extended as needed:
+The default file system is exported and can be extended as needed:  
 ```js
 const {FtpSrv, FileSystem} = require('ftp-srv');
 
@@ -172,52 +269,52 @@ class MyFileSystem extends FileSystem {
 Custom file systems can implement the following variables depending on the developers needs:
 
 ### Methods
-#### [`currentDirectory()`](src/fs.js#L29)
+#### [`currentDirectory()`](src/fs.js#L40)
 Returns a string of the current working directory  
 __Used in:__ `PWD`
 
-#### [`get(fileName)`](src/fs.js#L33)  
+#### [`get(fileName)`](src/fs.js#L44)
 Returns a file stat object of file or directory  
 __Used in:__ `LIST`, `NLST`, `STAT`, `SIZE`, `RNFR`, `MDTM`
 
-#### [`list(path)`](src/fs.js#L39)  
+#### [`list(path)`](src/fs.js#L50)
 Returns array of file and directory stat objects  
 __Used in:__ `LIST`, `NLST`, `STAT`
 
-#### [`chdir(path)`](src/fs.js#L56)  
+#### [`chdir(path)`](src/fs.js#L67)
 Returns new directory relative to current directory  
 __Used in:__ `CWD`, `CDUP`
 
-#### [`mkdir(path)`](src/fs.js#L96)  
+#### [`mkdir(path)`](src/fs.js#L114)
 Returns a path to a newly created directory  
 __Used in:__ `MKD`
 
-#### [`write(fileName, {append, start})`](src/fs.js#L68)  
+#### [`write(fileName, {append, start})`](src/fs.js#L79)
-Returns a writable stream   
+Returns a writable stream  
 Options:  
  `append` if true, append to existing file  
  `start` if set, specifies the byte offset to write to  
 __Used in:__ `STOR`, `APPE`
 
-#### [`read(fileName, {start})`](src/fs.js#L75)
+#### [`read(fileName, {start})`](src/fs.js#L90)
 Returns a readable stream  
 Options:  
  `start` if set, specifies the byte offset to read from  
 __Used in:__ `RETR`
 
-#### [`delete(path)`](src/fs.js#L87)
+#### [`delete(path)`](src/fs.js#L105)
 Delete a file or directory  
 __Used in:__ `DELE`
 
-#### [`rename(from, to)`](src/fs.js#L102)
+#### [`rename(from, to)`](src/fs.js#L120)
 Renames a file or directory  
 __Used in:__ `RNFR`, `RNTO`
 
-#### [`chmod(path)`](src/fs.js#L108)  
+#### [`chmod(path)`](src/fs.js#L126)
 Modifies a file or directory's permissions  
 __Used in:__ `SITE CHMOD`
 
-#### [`getUniqueName()`](src/fs.js#L113)
+#### [`getUniqueName()`](src/fs.js#L131)
 Returns a unique file name to write to  
 __Used in:__ `STOU`
 
@@ -226,12 +323,27 @@ __Used in:__ `STOU`
 
 See [CONTRIBUTING.md](CONTRIBUTING.md).
 
-
 <!--[]-->
 
+## Contributors
+
+- [OzairP](https://github.com/OzairP)
+- [qchar](https://github.com/qchar)
+- [jorinvo](https://github.com/jorinvo)
+- [voxsoftware](https://github.com/voxsoftware)
+- [pkeuter](https://github.com/pkeuter)
+- [TimLuq](https://github.com/TimLuq)
+- [edin-mg](https://github.com/edin-m)
+- [DiegoRBaquero](https://github.com/DiegoRBaquero)
+- [Johnnyrook777](https://github.com/Johnnyrook777)
+
 <!--[RM_LICENSE]-->
 ## License
 
 This software is licensed under the MIT Licence. See [LICENSE](LICENSE).
 
 <!--[]-->
+
+## References
+
+- [https://cr.yp.to/ftp.html](https://cr.yp.to/ftp.html)

bin/index.js

@@ -0,0 +1,137 @@
+#!/usr/bin/env node
+
+const yargs = require('yargs');
+const path = require('path');
+
+const FtpSrv = require('../src');
+const errors = require('../src/errors');
+
+const args = setupYargs();
+const state = setupState(args);
+startFtpServer(state);
+
+function setupYargs() {
+  return yargs
+    .option('credentials', {
+      alias: 'c',
+      describe: 'Load user & pass from json file',
+      normalize: true
+    })
+    .option('username', {
+      describe: 'Blank for anonymous',
+      type: 'string',
+      default: ''
+    })
+    .option('password', {
+      describe: 'Password for given username',
+      type: 'string'
+    })
+    .option('root', {
+      alias: 'r',
+      describe: 'Default root directory for users',
+      type: 'string',
+      normalize: true
+    })
+    .option('read-only', {
+      describe: 'Disable write actions such as upload, delete, etc',
+      boolean: true,
+      default: false
+    })
+    .option('pasv_url', {
+      describe: 'URL to provide for passive connections',
+      type: 'string'
+    })
+    .option('pasv_min', {
+      describe: 'Starting point to use when creating passive connections',
+      type: 'number',
+      default: 1024
+    })
+    .option('pasv_max', {
+      describe: 'Ending port to use when creating passive connections',
+      type: 'number',
+      default: 65535
+    })
+    .parse();
+}
+
+function setupState(_args) {
+  const _state = {};
+
+  function setupOptions() {
+    if (_args._ && _args._.length > 0) {
+      _state.url = _args._[0];
+    }
+    _state.pasv_url = _args.pasv_url;
+    _state.pasv_min = _args.pasv_min;
+    _state.pasv_max = _args.pasv_max;
+    _state.anonymous = _args.username === '';
+  }
+
+  function setupRoot() {
+    const dirPath = _args.root;
+    if (dirPath) {
+      _state.root = dirPath;
+    } else {
+      _state.root = process.cwd();
+    }
+  }
+
+  function setupCredentials() {
+    _state.credentials = {};
+
+    const setCredentials = (username, password, root = null) => {
+      _state.credentials[username] = {
+        password,
+        root
+      };
+    };
+
+    if (_args.credentials) {
+      const credentialsFile = path.resolve(_args.credentials);
+      const credentials = require(credentialsFile);
+
+      for (const cred of credentials) {
+        setCredentials(cred.username, cred.password, cred.root);
+      }
+    } else if (_args.username) {
+      setCredentials(_args.username, _args.password);
+    }
+  }
+
+  function setupCommandBlacklist() {
+    if (_args.readOnly) {
+      _state.blacklist = ['ALLO', 'APPE', 'DELE', 'MKD', 'RMD', 'RNRF', 'RNTO', 'STOR', 'STRU'];
+    }
+  }
+
+  setupOptions();
+  setupRoot();
+  setupCredentials();
+  setupCommandBlacklist();
+
+  return _state;
+}
+
+function startFtpServer(_state) {
+
+  function checkLogin(data, resolve, reject) {
+    const user = _state.credentials[data.username]
+    if (_state.anonymous || (user && user.password === data.password)) {
+      return resolve({root: (user && user.root) || _state.root});
+    }
+
+    return reject(new errors.GeneralError('Invalid username or password', 401));
+  }
+
+  const ftpServer = new FtpSrv({
+    url: _state.url,
+    pasv_url: _state.pasv_url,
+    pasv_min: _state.pasv_min,
+    pasv_max: _state.pasv_max,
+    anonymous: _state.anonymous,
+    blacklist: _state.blacklist
+  });
+
+  ftpServer.on('login', checkLogin);
+  ftpServer.listen();
+}

changelog/v2_to_v3_migation.md

@@ -0,0 +1,44 @@
+# Migration Guide - v2 to v3
+
+The `FtpServer` constructor has been changed to only take one object option. Combining the two just made sense.
+
+### From:
+
+```js
+const server = new FtpServer('ftp://0.0.0.0:21');
+```
+
+### To:
+
+```js
+const server = new FtpServer({
+  url: 'ftp://0.0.0.0:21'
+});
+```
+
+----
+
+The `pasv_range` option has been changed to separate integer variables: `pasv_min`, `pasv_max`.
+
+### From:
+
+```js
+const server = new FtpServer(..., {
+  pasv_range: '1000-2000'
+});
+```
+
+### To:
+
+```js
+const server = new FtpServer({
+  pasv_min: 1000,
+  pasv_max: 2000
+})
+```
+
+----
+
+The default passive port range has been changed to `1024` - `65535`
+
+----

config/testUnit/mocha.opts

@@ -1,5 +1,5 @@
 test/**/*.spec.js
 --reporter mocha-multi-reporters
 --reporter-options configFile=config/testUnit/reporters.json
---no-timeouts
 --ui bdd
+--bail

config/testUnit/reporters.json

@@ -1,5 +1,5 @@
 {
-  "reporterEnabled": "list, mocha-junit-reporter",
+  "reporterEnabled": "spec",
   "mochaJunitReporterReporterOptions": {
     "mochaFile": "reports/junit.xml"
   }

config/verify/.eslintrc

@@ -136,7 +136,7 @@
     "comma-dangle": 1,
     "new-cap": 2,
     "new-parens": 2,
-    "arrow-parens": [2, "as-needed"],
+    "arrow-parens": [2, "always"],
     "no-array-constructor": 2,
     "array-callback-return": 1,
     "no-extra-parens": 2,

confit.yml

@@ -1,49 +0,0 @@
-generator-confit:
-  app:
-    _version: 462ecd915fd9db1aef6a37c2b5ce8b58b80c18ba
-    buildProfile: Latest
-    copyrightOwner: Tyler Stewart
-    license: MIT
-    projectType: node
-    publicRepository: true
-    repositoryType: GitHub
-  paths:
-    _version: 780b129e0c7e5cab7e29c4f185bcf78524593a33
-    config:
-      configDir: config/
-    input:
-      srcDir: src/
-      unitTestDir: test/
-    output:
-      prodDir: dist/
-      reportDir: reports/
-  buildJS:
-    _version: ead8ce4280b07d696aff499a5fca1a933727582f
-    framework: []
-    frameworkScripts: []
-    outputFormat: ES6
-    sourceFormat: ES6
-  entryPoint:
-    _version: 39082c3df887fbc08744dfd088c25465e7a2e3a4
-    entryPoints:
-      main:
-        - src/index.js
-  testUnit:
-    _version: 30eee42a88ee42cce4f1ae48fe0cbe81647d189a
-    testDependencies: []
-    testFramework: mocha
-  verify:
-    _version: 30ae86c5022840a01fc08833e238a82c683fa1c7
-    jsCodingStandard: none
-  documentation:
-    _version: b1658da3278b16d1982212f5e8bc05348af20e0b
-    generateDocs: false
-  release:
-    _version: 47f220593935b502abf17cb34a396f692e453c49
-    checkCodeCoverage: true
-    commitMessageFormat: Conventional
-    useSemantic: true
-  sampleApp:
-    _version: 00c0a2c6fc0ed17fcccce2d548d35896121e58ba
-    createSampleApp: false
-  zzfinish: {}

ftp-srv.d.ts

@@ -1,8 +1,14 @@
 import * as tls from 'tls'
 import { Stats } from 'fs'
+import { EventEmitter } from 'events';
 
-export interface FileSystem {
+export class FileSystem {
-    constructor(connection: any, {root, cwd}?: {
+
+	readonly connection: FtpConnection;
+	readonly root: string;
+	readonly cwd: string;
+
+    constructor(connection: FtpConnection, {root, cwd}?: {
         root: any;
         cwd: any;
     });
@@ -35,7 +41,7 @@ export interface FileSystem {
     getUniqueName(): string;
 }
 
-export interface FtpConnection {
+export class FtpConnection extends EventEmitter {
 	server: FtpServer;
 	id: string;
 	log: any;
@@ -53,18 +59,21 @@ export interface FtpConnection {
 }
 
 export interface FtpServerOptions {
-    pasv_range?: number | string,
+    url?: string,
-    greeting?: string,
+    pasv_min?: number,
+    pasv_max?: number,
+    pasv_url?: string,
+    greeting?: string | string[],
     tls?: tls.SecureContext | false,
     anonymous?: boolean,
     blacklist?: Array<string>,
     whitelist?: Array<string>,
     file_format?: (stat: Stats) => string | Promise<string> | "ls" | "ep",
-	log: any
+    log?: any,
 }
 
-export interface FtpServer {
+export class FtpServer extends EventEmitter {
-    constructor(url: string, options?: FtpServerOptions);
+    constructor(options?: FtpServerOptions);
 
     readonly isTLS: boolean;
 
@@ -72,7 +81,7 @@ export interface FtpServer {
 
     emitPromise(action: any, ...data: any[]): Promise<any>;
 
-    emit(action: any, ...data: any[]): void;
+    // emit is exported from super class
 
     setupTLS(_tls: boolean): boolean | {
       cert: string;
@@ -94,9 +103,15 @@ export interface FtpServer {
 			username: string,
 			password: string
 		},
-		resolve: (fs?: FileSystem, root?: string, cwd?: string, blacklist?: Array<string>, whitelist?: Array<string>) => void,
+		resolve: (config: {
+            fs?: FileSystem,
+            root?: string,
+            cwd?: string,
+            blacklist?: Array<string>,
+            whitelist?: Array<string>
+        }) => void,
 		reject: (err?: Error) => void
-	) => void)
+	) => void): this;
 
 	on(event: "client-error", listener: (
 		data: {
@@ -104,8 +119,8 @@ export interface FtpServer {
 			context: string,
 			error: Error,
 		}
-	) => void)
+	) => void): this;
 }
 
-declare const FtpSrv: FtpServer;
+export {FtpServer as FtpSrv};
 export default FtpServer;

ftp-srv.js

@@ -1,6 +1,8 @@
 const FtpSrv = require('./src');
 const FileSystem = require('./src/fs');
+const errors = require('./src/errors');
 
 module.exports = FtpSrv;
 module.exports.FtpSrv = FtpSrv;
 module.exports.FileSystem = FileSystem;
+module.exports.ftpErrors = errors;

logo/generate.js

@@ -1,17 +1,23 @@
-/*
+const puppeteer = require('puppeteer');
-Send Button by Bruno Bosse from the Noun Project
+const logoPath = `file://${process.cwd()}/logo/logo.html`;
-https://thenounproject.com/brunobosse/collection/basics/?i=1054386
-*/
 
-const fs = require('fs');
+puppeteer.launch()
-const htmlConvert = require('html-convert');
+.then(browser => {
-
+  return browser.newPage()
-const convert = htmlConvert();
+  .then(page => {
-let ws = fs.createWriteStream('logo.png');
+    return page.goto(logoPath)
-let rs = convert('logo/logo.html', {
+    .then(() => page);
-  width: 350,
+  })
-  height: 76
+  .then(page => {
+    return page.setViewport({
+      width: 600,
+      height: 250,
+      deviceScaleFactor: 2
+    })
+    .then(() => page.screenshot({
+      path: 'logo.png',
+      omitBackground: true
+    }));
+  })
+  .then(() => browser.close());
 });
-
-rs.pipe(ws);
-ws.on('finish', () => process.exit());

logo/icon.svg

@@ -1,81 +0,0 @@
-<svg width="566" height="580" xmlns="http://www.w3.org/2000/svg" xmlns:svg="http://www.w3.org/2000/svg">
- <g>
-  <title>Layer 1</title>
-  <g display="none" id="svg_1">
-   <g display="inline" id="svg_2">
-    <circle cx="337.851" cy="245.093" r="68.103" id="svg_3"/>
-    <path d="m283.545,24.007c-145.682,0 -263.781,118.099 -263.781,263.781s118.099,263.781 263.781,263.781s263.781,-118.099 263.781,-263.781s-118.099,-263.781 -263.781,-263.781zm135.007,301.787c-35.898,35.898 -89.692,42.92 -132.482,20.934l-76.709,76.709c-13.651,13.651 -35.783,13.651 -49.434,0c-13.651,-13.651 -13.651,-35.784 0,-49.435l76.777,-76.777c-21.923,-42.853 -15.06,-96.699 20.761,-132.52c44.483,-44.483 116.448,-44.64 160.931,-0.157c44.482,44.485 44.639,116.763 0.156,161.246z" id="svg_4"/>
-   </g>
-  </g>
-  <g display="none" id="svg_5">
-   <g display="inline" id="svg_6">
-    <path d="m282,211.676c-7.801,0 -13,6.324 -13,14.125l0,66.199l-40.682,0c-7.975,0 -14.318,5.978 -14.318,13.953l0,0.597c0,7.975 6.343,14.449 14.318,14.449l54.641,0c0.053,0 -0.495,-0.012 -0.442,-0.013c0.053,0.001 -0.495,0.004 -0.442,0.004c7.801,0 12.925,-6.324 12.925,-14.125l0,-0.315l0,-0.597l0,-80.152c0,-7.801 -5.199,-14.125 -13,-14.125z" id="svg_7"/>
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-   <path d="m283.545,24.007c-145.682,0 -263.781,118.099 -263.781,263.781s118.099,263.781 263.781,263.781s263.781,-118.099 263.781,-263.781s-118.099,-263.781 -263.781,-263.781zm-62.545,379.174c0,11.498 -9.321,20.819 -20.819,20.819l-29.363,0c-11.497,0 -20.818,-9.321 -20.818,-20.819l0,-29.363c0,-11.498 9.321,-20.819 20.819,-20.819l29.363,0c11.498,0 20.819,9.321 20.819,20.819l0,29.363l-0.001,0zm0,-100c0,11.498 -9.321,20.819 -20.819,20.819l-29.363,0c-11.497,0 -20.818,-9.321 -20.818,-20.819l0,-29.363c0,-11.498 9.321,-20.819 20.819,-20.819l29.363,0c11.498,0 20.819,9.321 20.819,20.819l0,29.363l-0.001,0zm0,-102c0,11.498 -9.321,20.819 -20.819,20.819l-29.363,0c-11.497,0 -20.818,-9.321 -20.818,-20.819l0,-29.363c0,-11.498 9.321,-20.819 20.819,-20.819l29.363,0c11.498,0 20.819,9.321 20.819,20.819l0,29.363l-0.001,0zm212,186.032c0,11.48 -9.307,20.787 -20.787,20.787l-138.426,0c-11.48,0 -20.787,-9.307 -20.787,-20.787l0,-0.425c0,-11.481 9.307,-20.787 20.787,-20.787l138.425,0c11.481,0 20.787,9.307 20.787,20.787l0,0.425l0.001,0zm0,-98c0,11.48 -9.307,20.787 -20.787,20.787l-138.426,0c-11.48,0 -20.787,-9.307 -20.787,-20.787l0,-0.425c0,-11.481 9.307,-20.787 20.787,-20.787l138.425,0c11.481,0 20.787,9.307 20.787,20.787l0,0.425l0.001,0zm0,-101c0,11.48 -9.307,20.787 -20.787,20.787l-138.426,0c-11.48,0 -20.787,-9.307 -20.787,-20.787l0,-0.425c0,-11.481 9.307,-20.787 20.787,-20.787l138.425,0c11.481,0 20.787,9.307 20.787,20.787l0,0.425l0.001,0z" id="svg_38"/>
-  </g>
-  <g display="none" id="svg_39">
-   <g display="inline" id="svg_40">
-    <rect x="187" y="256" width="192" height="125" id="svg_41"/>
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-  </g>
-  <g display="none" id="svg_43">
-   <g display="inline" id="svg_44">
-    <path d="m348,411.767c7.039,0 12,-5.706 12,-12.745l0,-175.1c0,-7.039 -4.961,-12.745 -12,-12.745s-12,5.706 -12,12.745l0,175.1c0,7.038 4.961,12.745 12,12.745z" id="svg_45"/>
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-    <path d="m283.545,24.007c-145.682,0 -263.781,118.099 -263.781,263.781s118.099,263.781 263.781,263.781s263.781,-118.099 263.781,-263.781s-118.099,-263.781 -263.781,-263.781zm109.455,185.128l0,212.78c0,12.095 -10.073,23.085 -22.167,23.085l-173.233,0c-12.094,0 -21.6,-10.99 -21.6,-23.085l0,-212.78l0,-32.135l217,0l0,32.135zm0,-47.135l-217,0l0,-10.841c0,-12.095 9.505,-21.159 21.6,-21.159l55.634,0c0.497,-12 10.163,-21 21.942,-21l18.081,0c11.78,0 21.445,9 21.942,21l55.634,0c12.094,0 22.167,9.064 22.167,21.159l0,10.841z" id="svg_47"/>
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-   </g>
-  </g>
-  <g id="svg_49">
-   <g id="svg_50">
-    <polygon points="196.661,391.813 223.84,340.524 381.46,229.666 196.625,326.192   " id="svg_51" fill="#03a9f4"/>
-    <path d="m283.545,24.007c-145.682,0 -263.781,118.099 -263.781,263.781s118.099,263.781 263.781,263.781s263.781,-118.099 263.781,-263.781s-118.099,-263.781 -263.781,-263.781zm160.376,182.583l-117.664,174.425c-3.558,5.273 -10.504,7.04 -16.15,4.11l-47.144,-24.478l-64.897,56.276c-2.322,2.013 -5.247,3.062 -8.206,3.062c-1.752,0 -3.516,-0.368 -5.173,-1.119c-4.456,-2.023 -7.325,-6.456 -7.345,-11.349l-0.386,-91.883l-70.236,-36.656c-4.681,-2.443 -7.327,-7.562 -6.612,-12.794c0.715,-5.233 4.635,-9.454 9.801,-10.553l321.028,-68.291c4.992,-1.061 10.13,1.012 12.985,5.245c2.854,4.232 2.854,9.773 -0.001,14.005z" id="svg_52" fill="#03a9f4"/>
-   </g>
-  </g>
- </g>
-</svg>

logo/logo.html

@@ -1,29 +1,44 @@
 <!doctype html>
 <html>
   <head>
-    <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:400,700" rel="stylesheet">
+    <link href="https://fonts.googleapis.com/css?family=Overpass+Mono:700" rel="stylesheet">
     <style>
       body {
         padding: 0;
         margin: 0;
+        display: flex;
+        height: 100vh;
+        flex-direction: row;
+        justify-content: center;
+      }
+      div {
+        display: flex;
+        flex-direction: column;
+        justify-content: center;
+        width: 100vw;
       }
       h1 {
-        display: inline-block;
+        display: flex;
+        flex-direction: column;
+        align-self: center;
+        text-align: center;
         margin: 0;
-        margin-left: -4px;
         padding: 0px;
+        width: 75vw;
         font-size: 68px;
-        font-family: 'Source Code Pro', monospace;
+        font-family: 'Overpass Mono', monospace;
         font-weight: bold;
         line-height: 0.8em;
         letter-spacing: -3px;
-        color: #333;
+        color: #fff;
         -webkit-font-smoothing: antialiased;
+        -webkit-text-stroke: 1px #0063B1;
         text-shadow:
-          1px 0px 0px #ccc, 0px 1px 0px #eee,
+          3px 3px 0 #0063B1,
-          2px 1px 0px #ccc, 1px 2px 0px #eee,
+          -1px -1px 0 #0063B1,  
-          3px 2px 0px #ccc, 2px 3px 0px #eee,
+          1px -1px 0 #0063B1,
-          4px 3px 0px #ccc;
+          -1px 1px 0 #0063B1,
+          1px 1px 0 #0063B1;
       }
       h1 > span {
         display: block;
@@ -31,17 +46,23 @@
         margin: 0;
         padding-top: 6px;
       }
-      img {
+      h1 > hr {
-        display: inline-block;
+        padding: 0;
-        vertical-align: top;
+        margin: 0;
+        margin-top: 22px;
+        border: 1px solid #0063B1;
+        border-radius: 50%;
       }
     </style>
   </head>
 
   <body>
-    <h1>
+    <div>
-      <span>ftp-srv</span>
+      <h1>
-    </h1>
+        <span>ftp</span>
-    <img src="icon.svg" width="76px" height="76px" />
+        <hr />
+        <span>srv</span>
+      </h1>
+    </div>
   </body>
 </html>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ftp-srv",
-  "version": "0.0.0",
+  "version": "0.0.0-development",
   "description": "Modern, extensible FTP Server",
   "keywords": [
     "ftp",
@@ -14,34 +14,29 @@
   "license": "MIT",
   "files": [
     "src",
+    "bin",
     "ftp-srv.d.ts"
   ],
   "main": "ftp-srv.js",
+  "bin": "./bin/index.js",
   "types": "./ftp-srv.d.ts",
   "repository": {
     "type": "git",
     "url": "https://github.com/trs/ftp-srv"
   },
   "scripts": {
-    "pre-release": "npm-run-all verify test:coverage build ",
+    "pre-release": "npm run verify",
-    "build": "cross-env NODE_ENV=production npm run clean:prod",
-    "clean:prod": "rimraf dist/",
     "commitmsg": "cz-customizable-ghooks",
     "dev": "cross-env NODE_ENV=development npm run verify:watch",
-    "prepush": "npm-run-all verify test:coverage --silent",
+    "prepush": "npm run verify && npm run test:once --silent",
-    "semantic-release": "semantic-release pre && npm publish && semantic-release post",
+    "semantic-release": "semantic-release",
     "start": "npm run dev",
-    "test": "npm run test:unit",
+    "test": "cross-env NODE_ENV=test mocha --opts config/testUnit/mocha.opts -w",
-    "test:check-coverage": "nyc check-coverage",
+    "test:once": "cross-env NODE_ENV=test mocha --opts config/testUnit/mocha.opts",
-    "test:coverage": "npm-run-all test:unit:once test:check-coverage --silent",
+    "verify": "eslint -c config/verify/.eslintrc \"src/**/*.js\" \"test/**/*.js\""
-    "test:unit": "cross-env NODE_ENV=test nyc mocha --opts config/testUnit/mocha.opts -w",
+  },
-    "test:unit:once": "cross-env NODE_ENV=test nyc mocha --opts config/testUnit/mocha.opts",
+  "release": {
-    "upload-coverage": "cat reports/coverage/lcov.info | coveralls",
+    "verifyConditions": "condition-circle"
-    "verify": "npm run verify:js --silent",
-    "verify:js": "eslint -c config/verify/.eslintrc \"src/**/*.js\" \"test/**/*.js\" \"config/**/*.js\" && echo ✅ verify:js success",
-    "verify:js:fix": "eslint --fix -c config/verify/.eslintrc \"src/**/*.js\" \"test/**/*.js\" \"config/**/*.js\" && echo ✅ verify:js:fix success",
-    "verify:js:watch": "chokidar 'src/**/*.js' 'test/**/*.js' 'config/**/*.js' -c 'npm run verify:js:fix' --initial --silent",
-    "verify:watch": "npm run verify:js:watch --silent"
   },
   "config": {
     "commitizen": {
@@ -52,41 +47,37 @@
     }
   },
   "dependencies": {
-    "bunyan": "^1.8.10",
+    "bluebird": "^3.5.1",
-    "lodash": "^4.17.4",
+    "bunyan": "^1.8.12",
-    "moment": "^2.18.1",
+    "ip": "^1.1.5",
-    "uuid": "^3.1.0",
+    "lodash": "^4.17.10",
-    "when": "^3.7.8"
+    "moment": "^2.22.2",
+    "uuid": "^3.3.2",
+    "yargs": "^12.0.1"
   },
   "devDependencies": {
-    "chai": "^4.0.2",
+    "@icetee/ftp": "^1.0.3",
-    "chokidar-cli": "1.2.0",
+    "chai": "^4.1.2",
-    "coveralls": "2.13.1",
+    "condition-circle": "^2.0.1",
-    "cross-env": "3.1.4",
+    "cross-env": "5.2.0",
     "cz-customizable": "5.2.0",
     "cz-customizable-ghooks": "1.5.0",
-    "dotenv": "^4.0.0",
+    "eslint": "5.3.0",
-    "eslint": "4.5.0",
+    "eslint-config-google": "0.9.1",
-    "eslint-config-google": "0.8.0",
+    "eslint-friendly-formatter": "4.0.1",
-    "eslint-friendly-formatter": "3.0.0",
+    "eslint-plugin-mocha": "^5.1.0",
-    "eslint-plugin-mocha": "^4.11.0",
+    "eslint-plugin-node": "7.0.1",
-    "eslint-plugin-node": "5.1.1",
+    "husky": "0.14.3",
-    "ftp": "^0.3.10",
-    "html-convert": "^2.1.7",
-    "husky": "0.13.3",
     "istanbul": "0.4.5",
-    "mocha": "3.5.0",
+    "mocha": "^5.2.0",
-    "mocha-junit-reporter": "1.13.0",
+    "mocha-junit-reporter": "1.18.0",
-    "mocha-multi-reporters": "1.1.5",
+    "mocha-multi-reporters": "1.1.7",
-    "mocha-pretty-bunyan-nyan": "^1.0.4",
+    "rimraf": "2.6.2",
-    "npm-run-all": "4.0.2",
+    "semantic-release": "^15.9.8",
-    "nyc": "11.1.0",
+    "sinon": "^6.1.5"
-    "rimraf": "2.6.1",
-    "semantic-release": "^6.3.6",
-    "sinon": "^2.3.5"
   },
   "engines": {
     "node": ">=6.x",
-    "npm": ">=3.9.5"
+    "npm": ">=5.x"
   }
 }

src/commands/index.js

@@ -1,27 +1,32 @@
 const _ = require('lodash');
-const when = require('when');
+const Promise = require('bluebird');
 
 const REGISTRY = require('./registry');
 
+const CMD_FLAG_REGEX = new RegExp(/^-(\w{1})$/);
+
 class FtpCommands {
   constructor(connection) {
     this.connection = connection;
     this.previousCommand = {};
-    this.blacklist = _.get(this.connection, 'server.options.blacklist', []).map(cmd => _.upperCase(cmd));
+    this.blacklist = _.get(this.connection, 'server.options.blacklist', []).map((cmd) => _.upperCase(cmd));
-    this.whitelist = _.get(this.connection, 'server.options.whitelist', []).map(cmd => _.upperCase(cmd));
+    this.whitelist = _.get(this.connection, 'server.options.whitelist', []).map((cmd) => _.upperCase(cmd));
   }
 
   parse(message) {
     const strippedMessage = message.replace(/"/g, '');
-    const [directive, ...args] = strippedMessage.split(' ');
+    let [directive, ...args] = strippedMessage.split(' ');
+    directive = _.chain(directive).trim().toUpper().value();
+
+    const parseCommandFlags = !['RETR', 'SIZE', 'STOR'].includes(directive);
     const params = args.reduce(({arg, flags}, param) => {
-      if (/^-{1,2}[a-zA-Z0-9_]+/.test(param)) flags.push(param);
+      if (parseCommandFlags && CMD_FLAG_REGEX.test(param)) flags.push(param);
       else arg.push(param);
       return {arg, flags};
     }, {arg: [], flags: []});
 
     const command = {
-      directive: _.chain(directive).trim().toUpper().value(),
+      directive,
       arg: params.arg.length ? params.arg.join(' ') : null,
       flags: params.flags,
       raw: message
@@ -62,7 +67,7 @@ class FtpCommands {
     }
 
     const handler = commandRegister.handler.bind(this.connection);
-    return when.try(handler, {log, command, previous_command: this.previousCommand})
+    return Promise.resolve(handler({log, command, previous_command: this.previousCommand}))
     .finally(() => {
       this.previousCommand = _.clone(command);
     });

src/commands/registration/abor.js

@@ -2,12 +2,12 @@ module.exports = {
   directive: 'ABOR',
   handler: function () {
     return this.connector.waitForConnection()
-    .then(socket => {
+    .then((socket) => {
       return this.reply(426, {socket})
-      .then(() => this.connector.end());
+      .then(() => this.reply(226));
     })
-    .catch(() => {})
+    .catch(() => this.reply(225))
-    .then(() => this.reply(226));
+    .finally(() => this.connector.end());
   },
   syntax: '{{cmd}}',
   description: 'Abort an active file transfer'

src/commands/registration/auth.js

@@ -20,17 +20,17 @@ module.exports = {
 };
 
 function handleTLS() {
-  if (!this.server._tls) return this.reply(502);
+  if (!this.server.options.tls) return this.reply(502);
   if (this.secure) return this.reply(202);
 
   return this.reply(234)
   .then(() => {
-    const secureContext = tls.createSecureContext(this.server._tls);
+    const secureContext = tls.createSecureContext(this.server.options.tls);
     const secureSocket = new tls.TLSSocket(this.commandSocket, {
       isServer: true,
       secureContext
     });
-    ['data', 'timeout', 'end', 'close', 'drain', 'error'].forEach(event => {
+    ['data', 'timeout', 'end', 'close', 'drain', 'error'].forEach((event) => {
       function forwardEvent() {
         this.emit.apply(this, arguments);
       }

src/commands/registration/cwd.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const escapePath = require('../../helpers/escape-path');
 
 module.exports = {
@@ -7,12 +7,12 @@ module.exports = {
     if (!this.fs) return this.reply(550, 'File system not instantiated');
     if (!this.fs.chdir) return this.reply(402, 'Not supported by file system');
 
-    return when.try(this.fs.chdir.bind(this.fs), command.arg)
+    return Promise.try(() => this.fs.chdir(command.arg))
-    .then(cwd => {
+    .then((cwd) => {
       const path = cwd ? `"${escapePath(cwd)}"` : undefined;
       return this.reply(250, path);
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(550, err.message);
     });

src/commands/registration/dele.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 
 module.exports = {
   directive: 'DELE',
@@ -6,11 +6,11 @@ module.exports = {
     if (!this.fs) return this.reply(550, 'File system not instantiated');
     if (!this.fs.delete) return this.reply(402, 'Not supported by file system');
 
-    return when.try(this.fs.delete.bind(this.fs), command.arg)
+    return Promise.try(() => this.fs.delete(command.arg))
     .then(() => {
       return this.reply(250);
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(550, err.message);
     });

src/commands/registration/epsv.js

@@ -5,7 +5,7 @@ module.exports = {
   handler: function () {
     this.connector = new PassiveConnector(this);
     return this.connector.setupServer()
-    .then(server => {
+    .then((server) => {
       const {port} = server.address();
 
       return this.reply(229, `EPSV OK (|||${port}|)`);

src/commands/registration/feat.js

@@ -11,7 +11,7 @@ module.exports = {
         return feats;
       }, ['UTF8'])
       .sort()
-      .map(feat => ({
+      .map((feat) => ({
         message: ` ${feat}`,
         raw: true
       }));

src/commands/registration/help.js

@@ -12,7 +12,7 @@ module.exports = {
       const reply = _.concat([syntax.replace('{{cmd}}', directive), description]);
       return this.reply(214, ...reply);
     } else {
-      const supportedCommands = _.chunk(Object.keys(registry), 5).map(chunk => chunk.join('\t'));
+      const supportedCommands = _.chunk(Object.keys(registry), 5).map((chunk) => chunk.join('\t'));
       return this.reply(211, 'Supported commands:', ...supportedCommands, 'Use "HELP [command]" for syntax help.');
     }
   },

src/commands/registration/list.js

@@ -1,5 +1,5 @@
 const _ = require('lodash');
-const when = require('when');
+const Promise = require('bluebird');
 const getFileStat = require('../../helpers/file-stat');
 
 // http://cr.yp.to/ftp/list.html
@@ -16,35 +16,33 @@ module.exports = {
     const path = command.arg || '.';
     return this.connector.waitForConnection()
     .tap(() => this.commandSocket.pause())
-    .then(() => when.try(this.fs.get.bind(this.fs), path))
+    .then(() => Promise.try(() => this.fs.get(path)))
-    .then(stat => stat.isDirectory() ? when.try(this.fs.list.bind(this.fs), path) : [stat])
+    .then((stat) => stat.isDirectory() ? Promise.try(() => this.fs.list(path)) : [stat])
-    .then(files => {
+    .then((files) => {
-      const getFileMessage = file => {
+      const getFileMessage = (file) => {
         if (simple) return file.name;
         return getFileStat(file, _.get(this, 'server.options.file_format', 'ls'));
       };
 
-      const fileList = files.map(file => {
+      return Promise.try(() => files.map((file) => {
         const message = getFileMessage(file);
         return {
           raw: true,
           message,
           socket: this.connector.socket
         };
-      });
+      }));
-      return this.reply(150)
-      .then(() => {
-        if (fileList.length) return this.reply({}, ...fileList);
-      });
     })
-    .then(() => {
+    .tap(() => this.reply(150))
-      return this.reply(226, 'Transfer OK');
+    .then((fileList) => {
+      if (fileList.length) return this.reply({}, ...fileList);
     })
-    .catch(when.TimeoutError, err => {
+    .tap(() => this.reply(226))
+    .catch(Promise.TimeoutError, (err) => {
       log.error(err);
       return this.reply(425, 'No connection established');
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(451, err.message || 'No directory');
     })

src/commands/registration/mdtm.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const moment = require('moment');
 
 module.exports = {
@@ -7,12 +7,12 @@ module.exports = {
     if (!this.fs) return this.reply(550, 'File system not instantiated');
     if (!this.fs.get) return this.reply(402, 'Not supported by file system');
 
-    return when.try(this.fs.get.bind(this.fs), command.arg)
+    return Promise.try(() => this.fs.get(command.arg))
-    .then(fileStat => {
+    .then((fileStat) => {
       const modificationTime = moment.utc(fileStat.mtime).format('YYYYMMDDHHmmss.SSS');
       return this.reply(213, modificationTime);
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(550, err.message);
     });

src/commands/registration/mkd.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const escapePath = require('../../helpers/escape-path');
 
 module.exports = {
@@ -7,12 +7,12 @@ module.exports = {
     if (!this.fs) return this.reply(550, 'File system not instantiated');
     if (!this.fs.mkdir) return this.reply(402, 'Not supported by file system');
 
-    return when.try(this.fs.mkdir.bind(this.fs), command.arg)
+    return Promise.try(() => this.fs.mkdir(command.arg))
-    .then(dir => {
+    .then((dir) => {
       const path = dir ? `"${escapePath(dir)}"` : undefined;
       return this.reply(257, path);
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(550, err.message);
     });

src/commands/registration/opts.js

@@ -21,14 +21,19 @@ module.exports = {
 };
 
 function utf8([setting] = []) {
-  switch (_.toUpper(setting)) {
+  const getEncoding = () => {
-    case 'ON':
+    switch (_.toUpper(setting)) {
-      this.encoding = 'utf8';
+      case 'ON': return 'utf8';
-      return this.reply(200, 'UTF8 encoding on');
+      case 'OFF': return 'ascii';
-    case 'OFF':
+      default: return null;
-      this.encoding = 'ascii';
+    }
-      return this.reply(200, 'UTF8 encoding off');
+  };
-    default:
+
-      return this.reply(501, 'Unknown setting for option');
+  const encoding = getEncoding();
-  }
+  if (!encoding) return this.reply(501, 'Unknown setting for option');
+
+  this.encoding = encoding;
+  if (this.transferType !== 'binary') this.transferType = this.encoding;
+
+  return this.reply(200, `UTF8 encoding ${_.toLower(setting)}`);
 }

src/commands/registration/pass.js

@@ -12,7 +12,7 @@ module.exports = {
     .then(() => {
       return this.reply(230);
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(530, err.message || 'Authentication failed');
     });

src/commands/registration/pasv.js

@@ -5,8 +5,8 @@ module.exports = {
   handler: function () {
     this.connector = new PassiveConnector(this);
     return this.connector.setupServer()
-    .then(server => {
+    .then((server) => {
-      const address = this.server.url.hostname;
+      const address = this.server.options.pasv_url;
       const {port} = server.address();
       const host = address.replace(/\./g, ',');
       const portByte1 = port / 256 | 0;

src/commands/registration/port.js

@@ -10,7 +10,7 @@ module.exports = {
     if (rawConnection.length !== 6) return this.reply(425);
 
     const ip = rawConnection.slice(0, 4).join('.');
-    const portBytes = rawConnection.slice(4).map(p => parseInt(p));
+    const portBytes = rawConnection.slice(4).map((p) => parseInt(p));
     const port = portBytes[0] * 256 + portBytes[1];
 
     return this.connector.setupConnection(ip, port)

src/commands/registration/pwd.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const escapePath = require('../../helpers/escape-path');
 
 module.exports = {
@@ -7,12 +7,12 @@ module.exports = {
     if (!this.fs) return this.reply(550, 'File system not instantiated');
     if (!this.fs.currentDirectory) return this.reply(402, 'Not supported by file system');
 
-    return when.try(this.fs.currentDirectory.bind(this.fs))
+    return Promise.try(() => this.fs.currentDirectory())
-    .then(cwd => {
+    .then((cwd) => {
       const path = cwd ? `"${escapePath(cwd)}"` : undefined;
       return this.reply(257, path);
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(550, err.message);
     });

src/commands/registration/rest.js

@@ -9,7 +9,7 @@ module.exports = {
     if (isNaN(byteCount) || byteCount < 0) return this.reply(501, 'Byte count must be 0 or greater');
 
     this.restByteCount = byteCount;
-    return this.reply(350, `Resarting next transfer at ${byteCount}`);
+    return this.reply(350, `Restarting next transfer at ${byteCount}`);
   },
   syntax: '{{cmd}} <byte-count>',
   description: 'Restart transfer from the specified point. Resets after any STORE or RETRIEVE'

src/commands/registration/retr.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 
 module.exports = {
   directive: 'RETR',
@@ -6,32 +6,52 @@ module.exports = {
     if (!this.fs) return this.reply(550, 'File system not instantiated');
     if (!this.fs.read) return this.reply(402, 'Not supported by file system');
 
+    const filePath = command.arg;
+
     return this.connector.waitForConnection()
     .tap(() => this.commandSocket.pause())
-    .then(() => when.try(this.fs.read.bind(this.fs), command.arg, {start: this.restByteCount}))
+    .then(() => Promise.try(() => this.fs.read(filePath, {start: this.restByteCount})))
-    .then(stream => {
+    .then((fsResponse) => {
-      this.restByteCount = 0;
+      let {stream, clientPath} = fsResponse;
+      if (!stream && !clientPath) {
+        stream = fsResponse;
+        clientPath = filePath;
+      }
+      const serverPath = stream.path || filePath;
 
-      const eventsPromise = when.promise((resolve, reject) => {
+      const destroyConnection = (connection, reject) => (err) => {
-        this.connector.socket.once('error', err => reject(err));
+        if (connection) connection.destroy(err);
+        reject(err);
+      };
 
-        stream.on('data', data => this.connector.socket
+      const eventsPromise = new Promise((resolve, reject) => {
-          && this.connector.socket.write(data, this.transferType));
+        stream.on('data', (data) => {
-        stream.once('error', err => reject(err));
+          if (stream) stream.pause();
+          if (this.connector.socket) {
+            this.connector.socket.write(data, this.transferType, () => stream && stream.resume());
+          }
+        });
         stream.once('end', () => resolve());
+        stream.once('error', destroyConnection(this.connector.socket, reject));
+
+        this.connector.socket.once('error', destroyConnection(stream, reject));
       });
 
-      return this.reply(150).then(() => this.connector.socket.resume())
+      this.restByteCount = 0;
+
+      return this.reply(150).then(() => stream.resume() && this.connector.socket.resume())
       .then(() => eventsPromise)
-      .finally(() => stream.destroy ? stream.destroy() : null);
+      .tap(() => this.emit('RETR', null, serverPath))
+      .then(() => this.reply(226, clientPath))
+      .finally(() => stream.destroy && stream.destroy());
     })
-    .then(() => this.reply(226))
+    .catch(Promise.TimeoutError, (err) => {
-    .catch(when.TimeoutError, err => {
       log.error(err);
       return this.reply(425, 'No connection established');
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
+      this.emit('RETR', err);
       return this.reply(551, err.message);
     })
     .finally(() => {

src/commands/registration/rmd.js

@@ -1,4 +1,4 @@
-const dele = require('./dele').handler;
+const {handler: dele} = require('./dele');
 
 module.exports = {
   directive: ['RMD', 'XRMD'],

src/commands/registration/rnfr.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 
 module.exports = {
   directive: 'RNFR',
@@ -7,12 +7,12 @@ module.exports = {
     if (!this.fs.get) return this.reply(402, 'Not supported by file system');
 
     const fileName = command.arg;
-    return when.try(this.fs.get.bind(this.fs), fileName)
+    return Promise.try(() => this.fs.get(fileName))
     .then(() => {
       this.renameFrom = fileName;
       return this.reply(350);
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(550, err.message);
     });

src/commands/registration/rnto.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 
 module.exports = {
   directive: 'RNTO',
@@ -11,11 +11,11 @@ module.exports = {
     const from = this.renameFrom;
     const to = command.arg;
 
-    return when.try(this.fs.rename.bind(this.fs), from, to)
+    return Promise.try(() => this.fs.rename(from, to))
     .then(() => {
       return this.reply(250);
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(550, err.message);
     })

src/commands/registration/site/chmod.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 
 module.exports = function ({log, command} = {}) {
   if (!this.fs) return this.reply(550, 'File system not instantiated');
@@ -6,11 +6,11 @@ module.exports = function ({log, command} = {}) {
 
   const [mode, ...fileNameParts] = command.arg.split(' ');
   const fileName = fileNameParts.join(' ');
-  return when.try(this.fs.chmod.bind(this.fs), fileName, parseInt(mode, 8))
+  return Promise.try(() => this.fs.chmod(fileName, parseInt(mode, 8)))
   .then(() => {
     return this.reply(200);
   })
-  .catch(err => {
+  .catch((err) => {
     log.error(err);
     return this.reply(500);
   });

src/commands/registration/site/index.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const _ = require('lodash');
 
 const registry = require('./registry');
@@ -13,7 +13,7 @@ module.exports = {
     if (!registry.hasOwnProperty(subCommand.directive)) return this.reply(502);
 
     const handler = registry[subCommand.directive].handler.bind(this);
-    return when.try(handler, {log: subLog, command: subCommand});
+    return Promise.resolve(handler({log: subLog, command: subCommand}));
   },
   syntax: '{{cmd}} <subVerb> [...<subParams>]',
   description: 'Sends site specific commands to remote server'

src/commands/registration/size.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 
 module.exports = {
   directive: 'SIZE',
@@ -6,11 +6,11 @@ module.exports = {
     if (!this.fs) return this.reply(550, 'File system not instantiated');
     if (!this.fs.get) return this.reply(402, 'Not supported by file system');
 
-    return when.try(this.fs.get.bind(this.fs), command.arg)
+    return Promise.try(() => this.fs.get(command.arg))
-    .then(fileStat => {
+    .then((fileStat) => {
       return this.reply(213, {message: fileStat.size});
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
       return this.reply(550, err.message);
     });

src/commands/registration/stat.js

@@ -1,5 +1,5 @@
 const _ = require('lodash');
-const when = require('when');
+const Promise = require('bluebird');
 const getFileStat = require('../../helpers/file-stat');
 
 module.exports = {
@@ -11,27 +11,28 @@ module.exports = {
       if (!this.fs) return this.reply(550, 'File system not instantiated');
       if (!this.fs.get) return this.reply(402, 'Not supported by file system');
 
-      return when.try(this.fs.get.bind(this.fs), path)
+      return Promise.try(() => this.fs.get(path))
-      .then(stat => {
+      .then((stat) => {
         if (stat.isDirectory()) {
           if (!this.fs.list) return this.reply(402, 'Not supported by file system');
 
-          return when.try(this.fs.list.bind(this.fs), path)
+          return Promise.try(() => this.fs.list(path))
-          .then(files => {
+          .then((stats) => [213, stats]);
-            const fileList = files.map(file => {
-              const message = getFileStat(file, _.get(this, 'server.options.file_format', 'ls'));
-              return {
-                raw: true,
-                message
-              };
-            });
-            return this.reply(213, 'Status begin', ...fileList, 'Status end');
-          });
-        } else {
-          return this.reply(212, getFileStat(stat, _.get(this, 'server.options.file_format', 'ls')));
         }
+        return [212, [stat]];
       })
-      .catch(err => {
+      .then(([code, fileStats]) => {
+        return Promise.map(fileStats, (file) => {
+          const message = getFileStat(file, _.get(this, 'server.options.file_format', 'ls'));
+          return {
+            raw: true,
+            message
+          };
+        })
+        .then((messages) => [code, messages]);
+      })
+      .then(([code, messages]) => this.reply(code, 'Status begin', ...messages, 'Status end'))
+      .catch((err) => {
         log.error(err);
         return this.reply(450, err.message);
       });

src/commands/registration/stor.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 
 module.exports = {
   directive: 'STOR',
@@ -11,36 +11,58 @@ module.exports = {
 
     return this.connector.waitForConnection()
     .tap(() => this.commandSocket.pause())
-    .then(() => when.try(this.fs.write.bind(this.fs), fileName, {append, start: this.restByteCount}))
+    .then(() => Promise.try(() => this.fs.write(fileName, {append, start: this.restByteCount})))
-    .then(stream => {
+    .then((fsResponse) => {
-      this.restByteCount = 0;
+      let {stream, clientPath} = fsResponse;
+      if (!stream && !clientPath) {
+        stream = fsResponse;
+        clientPath = fileName;
+      }
+      const serverPath = stream.path || fileName;
 
-      const streamPromise = when.promise((resolve, reject) => {
+      const destroyConnection = (connection, reject) => (err) => {
-        stream.once('error', err => reject(err));
+        if (connection) {
+          if (connection.writeable) connection.end();
+          connection.destroy(err);
+        }
+        reject(err);
+      };
+
+      const streamPromise = new Promise((resolve, reject) => {
+        stream.once('error', destroyConnection(this.connector.socket, reject));
         stream.once('finish', () => resolve());
       });
 
-      const socketPromise = when.promise((resolve, reject) => {
+      const socketPromise = new Promise((resolve, reject) => {
-        this.connector.socket.on('data', data => stream.write(data, this.transferType));
+        this.connector.socket.on('data', (data) => {
+          if (this.connector.socket) this.connector.socket.pause();
+          if (stream) {
+            stream.write(data, this.transferType, () => this.connector.socket && this.connector.socket.resume());
+          }
+        });
         this.connector.socket.once('end', () => {
           if (stream.listenerCount('close')) stream.emit('close');
           else stream.end();
           resolve();
         });
-        this.connector.socket.once('error', err => reject(err));
+        this.connector.socket.once('error', destroyConnection(stream, reject));
       });
 
+      this.restByteCount = 0;
+
       return this.reply(150).then(() => this.connector.socket.resume())
-      .then(() => when.join(streamPromise, socketPromise))
+      .then(() => Promise.all([streamPromise, socketPromise]))
-      .finally(() => stream.destroy ? stream.destroy() : null);
+      .tap(() => this.emit('STOR', null, serverPath))
+      .then(() => this.reply(226, clientPath))
+      .finally(() => stream.destroy && stream.destroy());
     })
-    .then(() => this.reply(226, fileName))
+    .catch(Promise.TimeoutError, (err) => {
-    .catch(when.TimeoutError, err => {
       log.error(err);
       return this.reply(425, 'No connection established');
     })
-    .catch(err => {
+    .catch((err) => {
       log.error(err);
+      this.emit('STOR', err);
       return this.reply(550, err.message);
     })
     .finally(() => {

src/commands/registration/stou.js

@@ -1,6 +1,5 @@
-const when = require('when');
+const Promise = require('bluebird');
-
+const {handler: stor} = require('./stor');
-const stor = require('./stor').handler;
 
 module.exports = {
   directive: 'STOU',
@@ -9,12 +8,10 @@ module.exports = {
     if (!this.fs.get || !this.fs.getUniqueName) return this.reply(402, 'Not supported by file system');
 
     const fileName = args.command.arg;
-    return when.try(() => {
+    return Promise.try(() => this.fs.get(fileName))
-      return when.try(this.fs.get.bind(this.fs), fileName)
+    .then(() => Promise.try(() => this.fs.getUniqueName()))
-      .then(() => when.try(this.fs.getUniqueName.bind(this.fs)))
+    .catch(() => fileName)
-      .catch(() => when.resolve(fileName));
+    .then((name) => {
-    })
-    .then(name => {
       args.command.arg = name;
       return stor.call(this, args);
     });

src/commands/registration/type.js

@@ -1,4 +1,3 @@
-
 module.exports = {
   directive: 'TYPE',
   handler: function ({command} = {}) {

src/commands/registration/user.js

@@ -13,7 +13,7 @@ module.exports = {
       .then(() => {
         return this.reply(230);
       })
-      .catch(err => {
+      .catch((err) => {
         log.error(err);
         return this.reply(530, err.message || 'Authentication failed');
       });

src/commands/registry.js

@@ -43,7 +43,7 @@ const commands = [
 
 const registry = commands.reduce((result, cmd) => {
   const aliases = Array.isArray(cmd.directive) ? cmd.directive : [cmd.directive];
-  aliases.forEach(alias => result[alias] = cmd);
+  aliases.forEach((alias) => result[alias] = cmd);
   return result;
 }, {});
 

src/connection.js

@@ -1,7 +1,7 @@
 const _ = require('lodash');
 const uuid = require('uuid');
-const when = require('when');
+const Promise = require('bluebird');
-const sequence = require('when/sequence');
+const EventEmitter = require('events');
 
 const BaseConnector = require('./connector/base');
 const FileSystem = require('./fs');
@@ -9,8 +9,9 @@ const Commands = require('./commands');
 const errors = require('./errors');
 const DEFAULT_MESSAGE = require('./messages');
 
-class FtpConnection {
+class FtpConnection extends EventEmitter {
   constructor(server, options) {
+    super();
     this.server = server;
     this.id = uuid.v4();
     this.log = options.log.child({id: this.id, ip: this.ip});
@@ -24,7 +25,7 @@ class FtpConnection {
     this.connector = new BaseConnector(this);
 
     this.commandSocket = options.socket;
-    this.commandSocket.on('error', err => {
+    this.commandSocket.on('error', (err) => {
       this.log.error(err, 'Client error');
       this.server.emit('client-error', {connection: this, context: 'commandSocket', error: err});
     });
@@ -33,18 +34,19 @@ class FtpConnection {
     this.commandSocket.on('close', () => {
       if (this.connector) this.connector.end();
       if (this.commandSocket && !this.commandSocket.destroyed) this.commandSocket.destroy();
+      this.removeAllListeners();
     });
   }
 
   _handleData(data) {
     const messages = _.compact(data.toString(this.encoding).split('\r\n'));
     this.log.trace(messages);
-    return sequence(messages.map(message => this.commands.handle.bind(this.commands, message)));
+    return Promise.mapSeries(messages, (message) => this.commands.handle(message));
   }
 
   get ip() {
     try {
-      return this.dataSocket ? this.dataSocket.remoteAddress : this.commandSocket.remoteAddress;
+      return this.commandSocket ? this.commandSocket.remoteAddress : undefined;
     } catch (ex) {
       return null;
     }
@@ -65,14 +67,13 @@ class FtpConnection {
   }
 
   close(code = 421, message = 'Closing connection') {
-    return when
+    return Promise.resolve(code)
-      .resolve(code)
+      .then((_code) => _code && this.reply(_code, message))
-      .then(_code => _code && this.reply(_code, message))
       .then(() => this.commandSocket && this.commandSocket.end());
   }
 
   login(username, password) {
-    return when.try(() => {
+    return Promise.try(() => {
       const loginListeners = this.server.listeners('login');
       if (!loginListeners || !loginListeners.length) {
         if (!this.server.options.anonymous) throw new errors.GeneralError('No "login" listener setup', 500);
@@ -93,17 +94,21 @@ class FtpConnection {
       if (typeof options === 'number') options = {code: options}; // allow passing in code as first param
       if (!Array.isArray(letters)) letters = [letters];
       if (!letters.length) letters = [{}];
-      return when.map(letters, promise => {
+      return Promise.map(letters, (promise, index) => {
-        return when(promise)
+        return Promise.resolve(promise)
-        .then(letter => {
+        .then((letter) => {
           if (!letter) letter = {};
           else if (typeof letter === 'string') letter = {message: letter}; // allow passing in message as first param
 
           if (!letter.socket) letter.socket = options.socket ? options.socket : this.commandSocket;
           if (!letter.message) letter.message = DEFAULT_MESSAGE[options.code] || 'No information';
           if (!letter.encoding) letter.encoding = this.encoding;
-          return when(letter.message) // allow passing in a promise as a message
+          return Promise.resolve(letter.message) // allow passing in a promise as a message
-          .then(message => {
+          .then((message) => {
+            const seperator = !options.hasOwnProperty('eol') ?
+              letters.length - 1 === index ? ' ' : '-' :
+              options.eol ? ' ' : '-';
+            message = !letter.raw ? _.compact([letter.code || options.code, message]).join(seperator) : message;
             letter.message = message;
             return letter;
           });
@@ -111,16 +116,11 @@ class FtpConnection {
       });
     };
 
-    const processLetter = (letter, index) => {
+    const processLetter = (letter) => {
-      return when.promise((resolve, reject) => {
+      return new Promise((resolve, reject) => {
-        const seperator = !options.hasOwnProperty('eol') ?
-          letters.length - 1 === index ? ' ' : '-' :
-          options.eol ? ' ' : '-';
-        const packet = !letter.raw ? _.compact([letter.code || options.code, letter.message]).join(seperator) : letter.message;
-
         if (letter.socket && letter.socket.writable) {
-          this.log.trace({port: letter.socket.address().port, encoding: letter.encoding, packet}, 'Reply');
+          this.log.trace({port: letter.socket.address().port, encoding: letter.encoding, message: letter.message}, 'Reply');
-          letter.socket.write(packet + '\r\n', letter.encoding, err => {
+          letter.socket.write(letter.message + '\r\n', letter.encoding, (err) => {
             if (err) {
               this.log.error(err);
               return reject(err);
@@ -132,8 +132,10 @@ class FtpConnection {
     };
 
     return satisfyParameters()
-    .then(satisfiedLetters => sequence(satisfiedLetters.map((letter, index) => processLetter.bind(this, letter, index))))
+    .then((satisfiedLetters) => Promise.mapSeries(satisfiedLetters, (letter, index) => {
-    .catch(err => {
+      return processLetter(letter, index);
+    }))
+    .catch((err) => {
       this.log.error(err);
     });
   }

src/connector/active.js

@@ -1,6 +1,6 @@
 const {Socket} = require('net');
 const tls = require('tls');
-const when = require('when');
+const Promise = require('bluebird');
 const Connector = require('./base');
 
 class Active extends Connector {
@@ -10,29 +10,31 @@ class Active extends Connector {
   }
 
   waitForConnection({timeout = 5000, delay = 250} = {}) {
-    return when.iterate(
+    const checkSocket = () => {
-      () => {},
+      if (this.dataSocket && this.dataSocket.connected) {
-      () => this.dataSocket && this.dataSocket.connected,
+        return Promise.resolve(this.dataSocket);
-      () => when().delay(delay)
+      }
-    ).timeout(timeout)
+      return Promise.resolve().delay(delay)
-    .then(() => this.dataSocket);
+      .then(() => checkSocket());
+    };
+
+    return checkSocket().timeout(timeout);
   }
 
   setupConnection(host, port, family = 4) {
-    const closeExistingServer = () => this.dataSocket ?
+    const closeExistingServer = () => Promise.resolve(
-      when(this.dataSocket.destroy()) :
+      this.dataSocket ? this.dataSocket.destroy() : undefined);
-      when.resolve();
 
     return closeExistingServer()
     .then(() => {
       this.dataSocket = new Socket();
       this.dataSocket.setEncoding(this.connection.transferType);
-      this.dataSocket.on('error', err => this.server.emit('client-error', {connection: this.connection, context: 'dataSocket', error: err}));
+      this.dataSocket.on('error', (err) => this.server && this.server.emit('client-error', {connection: this.connection, context: 'dataSocket', error: err}));
       this.dataSocket.connect({host, port, family}, () => {
         this.dataSocket.pause();
 
         if (this.connection.secure) {
-          const secureContext = tls.createSecureContext(this.server._tls);
+          const secureContext = tls.createSecureContext(this.server.options.tls);
           const secureSocket = new tls.TLSSocket(this.dataSocket, {
             isServer: true,
             secureContext

src/connector/base.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const errors = require('../errors');
 
 class Connector {
@@ -23,15 +23,31 @@ class Connector {
   }
 
   waitForConnection() {
-    return when.reject(new errors.ConnectorError('No connector setup, send PASV or PORT'));
+    return Promise.reject(new errors.ConnectorError('No connector setup, send PASV or PORT'));
   }
 
+  closeSocket() {
+    if (this.dataSocket) {
+      const socket = this.dataSocket;
+      this.dataSocket.end(() => socket.destroy());
+      this.dataSocket = null;
+    }
+  }
+
+  closeServer() {
+    if (this.dataServer) {
+      this.dataServer.close();
+      this.dataServer = null;
+    }
+  }
+
+
   end() {
-    if (this.dataSocket) this.dataSocket.end();
+    this.closeSocket();
-    if (this.dataServer) this.dataServer.close();
+    this.closeServer();
-    this.dataSocket = null;
+
-    this.dataServer = null;
     this.type = false;
+    this.connection.connector = new Connector(this);
   }
 }
 module.exports = Connector;

src/connector/passive.js

@@ -1,9 +1,9 @@
 const net = require('net');
 const tls = require('tls');
-const when = require('when');
+const ip = require('ip');
+const Promise = require('bluebird');
 
 const Connector = require('./base');
-const findPort = require('../helpers/find-port');
 const errors = require('../errors');
 
 class Passive extends Connector {
@@ -12,26 +12,26 @@ class Passive extends Connector {
     this.type = 'passive';
   }
 
-  waitForConnection({timeout = 5000, delay = 250} = {}) {
+  waitForConnection({timeout = 5000, delay = 50} = {}) {
-    if (!this.dataServer) return when.reject(new errors.ConnectorError('Passive server not setup'));
+    if (!this.dataServer) return Promise.reject(new errors.ConnectorError('Passive server not setup'));
-    return when.iterate(
+
-      () => {},
+    const checkSocket = () => {
-      () => this.dataServer && this.dataServer.listening && this.dataSocket && this.dataSocket.connected,
+      if (this.dataServer && this.dataServer.listening && this.dataSocket && this.dataSocket.connected) {
-      () => when().delay(delay)
+        return Promise.resolve(this.dataSocket);
-    ).timeout(timeout)
+      }
-    .then(() => this.dataSocket);
+      return Promise.resolve().delay(delay)
+      .then(() => checkSocket());
+    };
+
+    return checkSocket().timeout(timeout);
   }
 
   setupServer() {
-    const closeExistingServer = () => this.dataServer ?
+    this.closeServer();
-      when.promise(resolve => this.dataServer.close(() => resolve())) :
+    return this.server.getNextPasvPort()
-      when.resolve();
+    .then((port) => {
-
+      const connectionHandler = (socket) => {
-    return closeExistingServer()
+        if (!ip.isEqual(this.connection.commandSocket.remoteAddress, socket.remoteAddress)) {
-    .then(() => this.getPort())
-    .then(port => {
-      const connectionHandler = socket => {
-        if (this.connection.commandSocket.remoteAddress !== socket.remoteAddress) {
           this.log.error({
             pasv_connection: socket.remoteAddress,
             cmd_connection: this.connection.commandSocket.remoteAddress
@@ -43,36 +43,35 @@ class Passive extends Connector {
         }
         this.log.trace({port, remoteAddress: socket.remoteAddress}, 'Passive connection fulfilled.');
 
-        if (this.connection.secure) {
+        this.dataSocket = socket;
-          const secureContext = tls.createSecureContext(this.server._tls);
-          const secureSocket = new tls.TLSSocket(socket, {
-            isServer: true,
-            secureContext
-          });
-          this.dataSocket = secureSocket;
-        } else {
-          this.dataSocket = socket;
-        }
-        this.dataSocket.connected = true;
         this.dataSocket.setEncoding(this.connection.transferType);
-        this.dataSocket.on('error', err => this.server.emit('client-error', {connection: this.connection, context: 'dataSocket', error: err}));
+        this.dataSocket.on('error', (err) => this.server && this.server.emit('client-error', {connection: this.connection, context: 'dataSocket', error: err}));
-        this.dataSocket.on('close', () => {
+
-          this.log.trace('Passive connection closed');
+        if (!this.connection.secure) {
-          this.end();
+          this.dataSocket.connected = true;
-        });
+        }
       };
 
       this.dataSocket = null;
-      this.dataServer = net.createServer({pauseOnConnect: true}, connectionHandler);
+
+      const serverOptions = Object.assign({}, this.connection.secure ? this.server.options.tls : {}, {pauseOnConnect: true});
+      this.dataServer = (this.connection.secure ? tls : net).createServer(serverOptions, connectionHandler);
       this.dataServer.maxConnections = 1;
-      this.dataServer.on('error', err => this.server.emit('client-error', {connection: this.connection, context: 'dataServer', error: err}));
+
-      this.dataServer.on('close', () => {
+      this.dataServer.on('error', (err) => this.server && this.server.emit('client-error', {connection: this.connection, context: 'dataServer', error: err}));
+      this.dataServer.once('close', () => {
         this.log.trace('Passive server closed');
-        this.dataServer = null;
+        this.end();
       });
 
-      return when.promise((resolve, reject) => {
+      if (this.connection.secure) {
-        this.dataServer.listen(port, err => {
+        this.dataServer.on('secureConnection', (socket) => {
+          socket.connected = true;
+        });
+      }
+
+      return new Promise((resolve, reject) => {
+        this.dataServer.listen(port, this.server.url.hostname, (err) => {
           if (err) reject(err);
           else {
             this.log.debug({port}, 'Passive connection listening');
@@ -83,15 +82,5 @@ class Passive extends Connector {
     });
   }
 
-  getPort() {
-    if (this.server.options.pasv_range) {
-      const [min, max] = typeof this.server.options.pasv_range === 'string' ?
-        this.server.options.pasv_range.split('-').map(v => v ? parseInt(v) : v) :
-        [this.server.options.pasv_range];
-      return findPort(min, max);
-    }
-    throw new errors.ConnectorError('Invalid pasv_range');
-  }
-
 }
 module.exports = Passive;

src/fs.js

@@ -1,27 +1,38 @@
 const _ = require('lodash');
 const nodePath = require('path');
 const uuid = require('uuid');
-const when = require('when');
+const Promise = require('bluebird');
-const whenNode = require('when/node');
+const fs = Promise.promisifyAll(require('fs'));
-const syncFs = require('fs');
-const fs = whenNode.liftAll(syncFs);
 const errors = require('./errors');
 
 class FileSystem {
   constructor(connection, {root, cwd} = {}) {
     this.connection = connection;
-    this.cwd = cwd || nodePath.sep;
+    this.cwd = cwd ? nodePath.join(nodePath.sep, cwd) : nodePath.sep;
-    this.root = root || process.cwd();
+    this._root = nodePath.resolve(root || process.cwd());
   }
 
-  _resolvePath(path = '') {
+  get root() {
-    const isFromRoot = _.startsWith(path, '/') || _.startsWith(path, nodePath.sep);
+    return this._root;
-    const cwd = isFromRoot ? nodePath.sep : this.cwd || nodePath.sep;
+  }
-    const serverPath = nodePath.join(nodePath.sep, cwd, path);
+
-    const fsPath = nodePath.join(this.root, serverPath);
+  _resolvePath(path = '.') {
+    const clientPath = (() => {
+      path = nodePath.normalize(path);
+      if (nodePath.isAbsolute(path)) {
+        return nodePath.join(path);
+      } else {
+        return nodePath.join(this.cwd, path);
+      }
+    })();
+
+    const fsPath = (() => {
+      const resolvedPath = nodePath.resolve(this.root, `.${nodePath.sep}${clientPath}`);
+      return nodePath.join(resolvedPath);
+    })();
 
     return {
-      serverPath,
+      clientPath,
       fsPath
     };
   }
@@ -32,20 +43,20 @@ class FileSystem {
 
   get(fileName) {
     const {fsPath} = this._resolvePath(fileName);
-    return fs.stat(fsPath)
+    return fs.statAsync(fsPath)
-    .then(stat => _.set(stat, 'name', fileName));
+    .then((stat) => _.set(stat, 'name', fileName));
   }
 
   list(path = '.') {
     const {fsPath} = this._resolvePath(path);
-    return fs.readdir(fsPath)
+    return fs.readdirAsync(fsPath)
-    .then(fileNames => {
+    .then((fileNames) => {
-      return when.map(fileNames, fileName => {
+      return Promise.map(fileNames, (fileName) => {
         const filePath = nodePath.join(fsPath, fileName);
-        return fs.access(filePath, syncFs.constants.F_OK)
+        return fs.accessAsync(filePath, fs.constants.F_OK)
         .then(() => {
-          return fs.stat(filePath)
+          return fs.statAsync(filePath)
-          .then(stat => _.set(stat, 'name', fileName));
+          .then((stat) => _.set(stat, 'name', fileName));
         })
         .catch(() => null);
       });
@@ -54,61 +65,67 @@ class FileSystem {
   }
 
   chdir(path = '.') {
-    const {fsPath, serverPath} = this._resolvePath(path);
+    const {fsPath, clientPath} = this._resolvePath(path);
-    return fs.stat(fsPath)
+    return fs.statAsync(fsPath)
-    .tap(stat => {
+    .tap((stat) => {
       if (!stat.isDirectory()) throw new errors.FileSystemError('Not a valid directory');
     })
     .then(() => {
-      this.cwd = serverPath;
+      this.cwd = clientPath;
       return this.currentDirectory();
     });
   }
 
   write(fileName, {append = false, start = undefined} = {}) {
-    const {fsPath} = this._resolvePath(fileName);
+    const {fsPath, clientPath} = this._resolvePath(fileName);
-    const stream = syncFs.createWriteStream(fsPath, {flags: !append ? 'w+' : 'a+', start});
+    const stream = fs.createWriteStream(fsPath, {flags: !append ? 'w+' : 'a+', start});
-    stream.once('error', () => fs.unlink(fsPath));
+    stream.once('error', () => fs.unlinkAsync(fsPath));
     stream.once('close', () => stream.end());
-    return stream;
+    return {
+      stream,
+      clientPath
+    };
   }
 
   read(fileName, {start = undefined} = {}) {
-    const {fsPath} = this._resolvePath(fileName);
+    const {fsPath, clientPath} = this._resolvePath(fileName);
-    return fs.stat(fsPath)
+    return fs.statAsync(fsPath)
-    .tap(stat => {
+    .tap((stat) => {
       if (stat.isDirectory()) throw new errors.FileSystemError('Cannot read a directory');
     })
     .then(() => {
-      const stream = syncFs.createReadStream(fsPath, {flags: 'r', start});
+      const stream = fs.createReadStream(fsPath, {flags: 'r', start});
-      return stream;
+      return {
+        stream,
+        clientPath
+      };
     });
   }
 
   delete(path) {
     const {fsPath} = this._resolvePath(path);
-    return fs.stat(fsPath)
+    return fs.statAsync(fsPath)
-    .then(stat => {
+    .then((stat) => {
-      if (stat.isDirectory()) return fs.rmdir(fsPath);
+      if (stat.isDirectory()) return fs.rmdirAsync(fsPath);
-      else return fs.unlink(fsPath);
+      else return fs.unlinkAsync(fsPath);
     });
   }
 
   mkdir(path) {
     const {fsPath} = this._resolvePath(path);
-    return fs.mkdir(fsPath)
+    return fs.mkdirAsync(fsPath)
     .then(() => fsPath);
   }
 
   rename(from, to) {
     const {fsPath: fromPath} = this._resolvePath(from);
     const {fsPath: toPath} = this._resolvePath(to);
-    return fs.rename(fromPath, toPath);
+    return fs.renameAsync(fromPath, toPath);
   }
 
   chmod(path, mode) {
     const {fsPath} = this._resolvePath(path);
-    return fs.chmod(fsPath, mode);
+    return fs.chmodAsync(fsPath, mode);
   }
 
   getUniqueName() {

src/helpers/file-stat.js

@@ -18,7 +18,8 @@ module.exports = function (fileStat, format = 'ls') {
 function ls(fileStat) {
   const now = moment.utc();
   const mtime = moment.utc(new Date(fileStat.mtime));
-  const dateFormat = now.diff(mtime, 'months') < 6 ? 'MMM DD HH:mm' : 'MMM DD  YYYY';
+  const timeDiff = now.diff(mtime, 'months');
+  const dateFormat = timeDiff < 6 ? 'MMM DD HH:mm' : 'MMM DD  YYYY';
 
   return [
     fileStat.mode ? [

src/helpers/find-port.js

@@ -1,27 +1,36 @@
 const net = require('net');
-const when = require('when');
+const Promise = require('bluebird');
 const errors = require('../errors');
 
-module.exports = function (min = 1, max = undefined) {
+function* portNumberGenerator(min, max) {
-  return when.promise((resolve, reject) => {
+  let current = min;
-    let checkPort = min;
+  while (true) {
-    let portCheckServer = net.createServer();
+    if (current > 65535 || current > max) {
-    portCheckServer.maxConnections = 0;
+      current = min;
-    portCheckServer.on('error', () => {
+    }
-      if (checkPort < 65535 && (!max || checkPort < max)) {
+    yield current++;
-        checkPort = checkPort + 1;
+  }
-        portCheckServer.listen(checkPort);
+}
-      } else {
+
-        reject(new errors.GeneralError('Unable to find open port', 500));
+function getNextPortFactory(min, max = Infinity) {
-      }
+  const nextPortNumber = portNumberGenerator(min, max);
-    });
+  const portCheckServer = net.createServer();
-    portCheckServer.on('listening', () => {
+  portCheckServer.maxConnections = 0;
-      const {port} = portCheckServer.address();
+  portCheckServer.on('error', () => {
-      portCheckServer.close(() => {
+    portCheckServer.listen(nextPortNumber.next().value);
-        portCheckServer = null;
-        resolve(port);
-      });
-    });
-    portCheckServer.listen(checkPort);
   });
+
+  return () => new Promise((resolve) => {
+    portCheckServer.once('listening', () => {
+      const {port} = portCheckServer.address();
+      portCheckServer.close(() => resolve(port));
+    });
+    portCheckServer.listen(nextPortNumber.next().value);
+  })
+  .catch(RangeError, (err) => Promise.reject(new errors.ConnectorError(err.message)));
+}
+
+module.exports = {
+  getNextPortFactory,
+  portNumberGenerator
 };

src/helpers/resolve-host.js

@@ -1,19 +1,19 @@
 const http = require('http');
-const when = require('when');
+const Promise = require('bluebird');
 const errors = require('../errors');
 
 const IP_WEBSITE = 'http://api.ipify.org/';
 
 module.exports = function (hostname) {
-  return when.promise((resolve, reject) => {
+  return new Promise((resolve, reject) => {
     if (!hostname || hostname === '0.0.0.0') {
       let ip = '';
-      http.get(IP_WEBSITE, response => {
+      http.get(IP_WEBSITE, (response) => {
         if (response.statusCode !== 200) {
           return reject(new errors.GeneralError('Unable to resolve hostname', response.statusCode));
         }
         response.setEncoding('utf8');
-        response.on('data', chunk => {
+        response.on('data', (chunk) => {
           ip += chunk;
         });
         response.on('end', () => {

src/index.js

@@ -1,38 +1,45 @@
 const _ = require('lodash');
-const when = require('when');
+const Promise = require('bluebird');
 const nodeUrl = require('url');
 const buyan = require('bunyan');
 const net = require('net');
 const tls = require('tls');
-const fs = require('fs');
+const EventEmitter = require('events');
 
 const Connection = require('./connection');
 const resolveHost = require('./helpers/resolve-host');
+const {getNextPortFactory} = require('./helpers/find-port');
 
-class FtpServer {
+class FtpServer extends EventEmitter {
-  constructor(url, options = {}) {
+  constructor(options = {}) {
-    this.options = _.merge({
+    super();
+    this.options = Object.assign({
       log: buyan.createLogger({name: 'ftp-srv'}),
+      url: 'ftp://127.0.0.1:21',
+      pasv_min: 1024,
+      pasv_max: 65535,
+      pasv_url: null,
       anonymous: false,
-      pasv_range: 22,
       file_format: 'ls',
       blacklist: [],
       whitelist: [],
       greeting: null,
       tls: false
     }, options);
+
     this._greeting = this.setupGreeting(this.options.greeting);
     this._features = this.setupFeaturesMessage();
-    this._tls = this.setupTLS(this.options.tls);
 
     delete this.options.greeting;
-    delete this.options.tls;
 
     this.connections = {};
     this.log = this.options.log;
-    this.url = nodeUrl.parse(url || 'ftp://127.0.0.1:21');
+    this.url = nodeUrl.parse(this.options.url);
+    this.getNextPasvPort = getNextPortFactory(
+      _.get(this, 'options.pasv_min'),
+      _.get(this, 'options.pasv_max'));
 
-    const serverConnectionHandler = socket => {
+    const serverConnectionHandler = (socket) => {
       let connection = new Connection(this, {log: this.log, socket});
       this.connections[connection.id] = connection;
 
@@ -43,29 +50,31 @@ class FtpServer {
       return connection.reply(220, ...greeting, features)
       .finally(() => socket.resume());
     };
-    const serverOptions = _.assign(this.isTLS ? this._tls : {}, {pauseOnConnect: true});
+    const serverOptions = Object.assign({}, this.isTLS ? this.options.tls : {}, {pauseOnConnect: true});
 
     this.server = (this.isTLS ? tls : net).createServer(serverOptions, serverConnectionHandler);
-    this.server.on('error', err => this.log.error(err, '[Event] error'));
+    this.server.on('error', (err) => this.log.error(err, '[Event] error'));
-    this.on = this.server.on.bind(this.server);
-    this.once = this.server.once.bind(this.server);
-    this.listeners = this.server.listeners.bind(this.server);
 
-    process.on('SIGTERM', () => this.quit());
+    const quit = _.debounce(this.quit.bind(this), 100);
-    process.on('SIGINT', () => this.quit());
+
-    process.on('SIGQUIT', () => this.quit());
+    process.on('SIGTERM', quit);
+    process.on('SIGINT', quit);
+    process.on('SIGQUIT', quit);
   }
 
   get isTLS() {
-    return this.url.protocol === 'ftps:' && this._tls;
+    return this.url.protocol === 'ftps:' && this.options.tls;
   }
 
   listen() {
-    return resolveHost(this.url.hostname)
+    return resolveHost(this.options.pasv_url || this.url.hostname)
-    .then(hostname => {
+    .then((pasvUrl) => {
-      this.url.hostname = hostname;
+      this.options.pasv_url = pasvUrl;
-      return when.promise((resolve, reject) => {
+
-        this.server.listen(this.url.port, err => {
+      return new Promise((resolve, reject) => {
+        this.server.once('error', reject);
+        this.server.listen(this.url.port, this.url.hostname, (err) => {
+          this.server.removeListener('error', reject);
           if (err) return reject(err);
           this.log.info({
             protocol: this.url.protocol.replace(/\W/g, ''),
@@ -79,22 +88,9 @@ class FtpServer {
   }
 
   emitPromise(action, ...data) {
-    const defer = when.defer();
+    return new Promise((resolve, reject) => {
-    const params = _.concat(data, [defer.resolve, defer.reject]);
+      const params = _.concat(data, [resolve, reject]);
-    this.server.emit(action, ...params);
+      this.emit.call(this, action, ...params);
-    return defer.promise;
-  }
-
-  emit(action, ...data) {
-    this.server.emit(action, ...data);
-  }
-
-  setupTLS(_tls) {
-    if (!_tls) return false;
-    return _.assign({}, _tls, {
-      cert: _tls.cert ? fs.readFileSync(_tls.cert) : undefined,
-      key: _tls.key ? fs.readFileSync(_tls.key) : undefined,
-      ca: _tls.ca ? Array.isArray(_tls.ca) ? _tls.ca.map(_ca => fs.readFileSync(_ca)) : [fs.readFileSync(_tls.ca)] : undefined
     });
   }
 
@@ -116,7 +112,7 @@ class FtpServer {
   }
 
   disconnectClient(id) {
-    return when.promise(resolve => {
+    return new Promise((resolve) => {
       const client = this.connections[id];
       if (!client) return resolve();
       delete this.connections[id];
@@ -138,13 +134,14 @@ class FtpServer {
   close() {
     this.log.info('Server closing...');
     this.server.maxConnections = 0;
-    return when.map(Object.keys(this.connections), id => when.try(this.disconnectClient.bind(this), id))
+    return Promise.map(Object.keys(this.connections), (id) => Promise.try(this.disconnectClient.bind(this, id)))
-    .then(() => when.promise(resolve => {
+    .then(() => new Promise((resolve) => {
-      this.server.close(err => {
+      this.server.close((err) => {
         if (err) this.log.error(err, 'Error closing server');
         resolve('Closed');
       });
-    }));
+    }))
+    .then(() => this.removeAllListeners());
   }
 
 }

test/commands/index.spec.js

@@ -1,5 +1,5 @@
 const {expect} = require('chai');
-const when = require('when');
+const Promise = require('bluebird');
 const bunyan = require('bunyan');
 const sinon = require('sinon');
 
@@ -11,7 +11,7 @@ describe('FtpCommands', function () {
   let mockConnection = {
     authenticated: false,
     log: bunyan.createLogger({name: 'FtpCommands'}),
-    reply: () => when.resolve({}),
+    reply: () => Promise.resolve({}),
     server: {
       options: {
         blacklist: ['allo']
@@ -20,7 +20,7 @@ describe('FtpCommands', function () {
   };
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     commands = new FtpCommands(mockConnection);
 
@@ -64,8 +64,8 @@ describe('FtpCommands', function () {
     it('two args, with flags: test -l arg1 -A arg2 --zz88A', () => {
       const cmd = commands.parse('test -l arg1 -A arg2 --zz88A');
       expect(cmd.directive).to.equal('TEST');
-      expect(cmd.arg).to.equal('arg1 arg2');
+      expect(cmd.arg).to.equal('arg1 arg2 --zz88A');
-      expect(cmd.flags).to.deep.equal(['-l', '-A', '--zz88A']);
+      expect(cmd.flags).to.deep.equal(['-l', '-A']);
       expect(cmd.raw).to.equal('test -l arg1 -A arg2 --zz88A');
     });
 
@@ -76,6 +76,13 @@ describe('FtpCommands', function () {
       expect(cmd.flags).to.deep.equal(['-l']);
       expect(cmd.raw).to.equal('list -l');
     });
+
+    it('does not check for option flags', () => {
+      const cmd = commands.parse('retr -test');
+      expect(cmd.directive).to.equal('RETR');
+      expect(cmd.arg).to.equal('-test');
+      expect(cmd.flags).to.deep.equal([]);
+    });
   });
 
   describe('handle', function () {

test/commands/registration/abor.spec.js

@@ -1,21 +1,21 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
 const CMD = 'ABOR';
-describe(CMD, function () {
+describe.skip(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve(),
+    reply: () => Promise.resolve(),
     connector: {
-      waitForConnection: () => when.resolve(),
+      waitForConnection: () => Promise.resolve(),
-      end: () => when.resolve()
+      end: () => Promise.resolve()
     }
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
     sandbox.spy(mockClient.connector, 'waitForConnection');
@@ -33,7 +33,7 @@ describe(CMD, function () {
     .then(() => {
       expect(mockClient.connector.waitForConnection.callCount).to.equal(1);
       expect(mockClient.connector.end.callCount).to.equal(0);
-      expect(mockClient.reply.args[0][0]).to.equal(226);
+      expect(mockClient.reply.args[0][0]).to.equal(225);
     });
   });
 

test/commands/registration/allo.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,12 +6,12 @@ const CMD = 'ALLO';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/auth.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,15 +6,17 @@ const CMD = 'AUTH';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve(),
+    reply: () => Promise.resolve(),
     server: {
-      _tls: {}
+      options: {
+        tls: {}
+      }
     }
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/cdup.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const bunyan = require('bunyan');
 const {expect} = require('chai');
 const sinon = require('sinon');
@@ -8,15 +8,15 @@ describe(CMD, function () {
   let sandbox;
   let log = bunyan.createLogger({name: CMD});
   const mockClient = {
-    reply: () => when.resolve(),
+    reply: () => Promise.resolve(),
     fs: {
-      chdir: () => when.resolve()
+      chdir: () => Promise.resolve()
     }
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
     sandbox.spy(mockClient.fs, 'chdir');

test/commands/registration/cwd.spec.js

@@ -13,7 +13,7 @@ describe(CMD, function () {
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
     sandbox.stub(mockClient.fs, 'chdir').resolves();

test/commands/registration/dele.spec.js

@@ -13,7 +13,7 @@ describe(CMD, function () {
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
     sandbox.stub(mockClient.fs, 'delete').resolves();

test/commands/registration/eprt.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -8,12 +8,12 @@ const CMD = 'EPRT';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
     sandbox.stub(ActiveConnector.prototype, 'setupConnection').resolves();

test/commands/registration/epsv.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -8,12 +8,12 @@ const CMD = 'EPSV';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
     sandbox.stub(PassiveConnector.prototype, 'setupServer').resolves({

test/commands/registration/help.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,12 +6,12 @@ const CMD = 'HELP';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/list.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const bunyan = require('bunyan');
 const {expect} = require('chai');
 const sinon = require('sinon');
@@ -14,8 +14,8 @@ describe(CMD, function () {
       get: () => {}
     },
     connector: {
-      waitForConnection: () => when({}),
+      waitForConnection: () => Promise.resolve({}),
-      end: () => {}
+      end: () => Promise.resolve({})
     },
     commandSocket: {
       resume: () => {},
@@ -25,7 +25,7 @@ describe(CMD, function () {
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
     sandbox.stub(mockClient.fs, 'get').resolves({
@@ -165,7 +165,7 @@ describe(CMD, function () {
   });
 
   it('. // unsuccessful (timeout)', () => {
-    sandbox.stub(mockClient.connector, 'waitForConnection').returns(when.reject(new when.TimeoutError()));
+    sandbox.stub(mockClient.connector, 'waitForConnection').returns(Promise.reject(new Promise.TimeoutError()));
 
     return cmdFn({log, command: {directive: CMD}})
     .then(() => {

test/commands/registration/mdtm.spec.js

@@ -13,7 +13,7 @@ describe(CMD, function () {
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
     sandbox.stub(mockClient.fs, 'get').resolves({mtime: 'Mon, 10 Oct 2011 23:24:11 GMT'});

test/commands/registration/mkd.spec.js

@@ -13,7 +13,7 @@ describe(CMD, function () {
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
     sandbox.stub(mockClient.fs, 'mkdir').resolves();

test/commands/registration/mode.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,12 +6,12 @@ const CMD = 'MODE';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/nlst.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const bunyan = require('bunyan');
 const {expect} = require('chai');
 const sinon = require('sinon');
@@ -14,8 +14,8 @@ describe(CMD, function () {
       list: () => {}
     },
     connector: {
-      waitForConnection: () => when({}),
+      waitForConnection: () => Promise.resolve({}),
-      end: () => {}
+      end: () => Promise.resolve({})
     },
     commandSocket: {
       resume: () => {},
@@ -25,7 +25,7 @@ describe(CMD, function () {
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
     sandbox.stub(mockClient.fs, 'get').resolves({

test/commands/registration/noop.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,12 +6,12 @@ const CMD = 'NOOP';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/opts.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,12 +6,12 @@ const CMD = 'OPTS';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/pass.spec.js

@@ -15,7 +15,7 @@ describe(CMD, function () {
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
     sandbox.stub(mockClient, 'login').resolves();

test/commands/registration/pbsz.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,13 +6,13 @@ const CMD = 'PBSZ';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve(),
+    reply: () => Promise.resolve(),
     server: {}
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/port.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -8,12 +8,12 @@ const CMD = 'PORT';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
     sandbox.stub(ActiveConnector.prototype, 'setupConnection').resolves();

test/commands/registration/prot.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,13 +6,13 @@ const CMD = 'PROT';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve(),
+    reply: () => Promise.resolve(),
     server: {}
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/pwd.spec.js

@@ -13,7 +13,7 @@ describe(CMD, function () {
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
     sandbox.stub(mockClient.fs, 'currentDirectory').resolves();

test/commands/registration/quit.spec.js

@@ -10,7 +10,7 @@ describe(CMD, function () {
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'close').resolves();
   });

test/commands/registration/rest.spec.js

@@ -1,17 +1,17 @@
 const {expect} = require('chai');
 const sinon = require('sinon');
-const when = require('when');
+const Promise = require('bluebird');
 
 const CMD = 'REST';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/retr.spec.js

@@ -1,34 +1,41 @@
-const when = require('when');
+const Promise = require('bluebird');
 const bunyan = require('bunyan');
 const {expect} = require('chai');
 const sinon = require('sinon');
+const EventEmitter = require('events');
 
 const CMD = 'RETR';
 describe(CMD, function () {
   let sandbox;
   let log = bunyan.createLogger({name: CMD});
+  let emitter;
   const mockClient = {
     commandSocket: {
       pause: () => {},
       resume: () => {}
     },
-    reply: () => when.resolve(),
+    reply: () => Promise.resolve(),
     connector: {
-      waitForConnection: () => when.resolve({
+      waitForConnection: () => Promise.resolve({
         resume: () => {}
       }),
-      end: () => {}
+      end: () => Promise.resolve({})
     }
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     mockClient.fs = {
       read: () => {}
     };
 
+    emitter = new EventEmitter();
+    mockClient.emit = emitter.emit.bind(emitter);
+    mockClient.on = emitter.on.bind(emitter);
+    mockClient.once = emitter.once.bind(emitter);
+
     sandbox.spy(mockClient, 'reply');
   });
   afterEach(() => sandbox.restore());
@@ -53,9 +60,10 @@ describe(CMD, function () {
 
   it('// unsuccessful | connector times out', () => {
     sandbox.stub(mockClient.connector, 'waitForConnection').callsFake(function () {
-      return when.reject(new when.TimeoutError());
+      return Promise.reject(new Promise.TimeoutError());
     });
 
+
     return cmdFn({log, command: {arg: 'test.txt'}})
     .then(() => {
       expect(mockClient.reply.args[0][0]).to.equal(425);
@@ -64,7 +72,7 @@ describe(CMD, function () {
 
   it('// unsuccessful | connector errors out', () => {
     sandbox.stub(mockClient.connector, 'waitForConnection').callsFake(function () {
-      return when.reject(new Error('test'));
+      return Promise.reject(new Error('test'));
     });
 
     return cmdFn({log, command: {arg: 'test.txt'}})
@@ -72,4 +80,20 @@ describe(CMD, function () {
       expect(mockClient.reply.args[0][0]).to.equal(551);
     });
   });
+
+  it('// unsuccessful | emits error event', () => {
+    sandbox.stub(mockClient.connector, 'waitForConnection').callsFake(function () {
+      return Promise.reject(new Error('test'));
+    });
+
+    let errorEmitted = false;
+    emitter.once('RETR', (err) => {
+      errorEmitted = !!err;
+    });
+
+    return cmdFn({log, command: {arg: 'test.txt'}})
+    .then(() => {
+      expect(errorEmitted).to.equal(true);
+    });
+  });
 });

test/commands/registration/rnfr.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,15 +6,15 @@ const CMD = 'RNFR';
 describe(CMD, function () {
   let sandbox;
   const mockLog = {error: () => {}};
-  const mockClient = {reply: () => when.resolve()};
+  const mockClient = {reply: () => Promise.resolve()};
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     mockClient.renameFrom = 'test';
     mockClient.fs = {
-      get: () => when.resolve()
+      get: () => Promise.resolve()
     };
 
     sandbox.spy(mockClient, 'reply');

test/commands/registration/rnto.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,16 +6,16 @@ const CMD = 'RNTO';
 describe(CMD, function () {
   let sandbox;
   const mockLog = {error: () => {}};
-  const mockClient = {reply: () => when.resolve()};
+  const mockClient = {reply: () => Promise.resolve()};
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     mockClient.renameFrom = 'test';
     mockClient.fs = {
-      get: () => when.resolve(),
+      get: () => Promise.resolve(),
-      rename: () => when.resolve()
+      rename: () => Promise.resolve()
     };
 
     sandbox.spy(mockClient, 'reply');

test/commands/registration/site/chmod.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,14 +6,14 @@ const CMD = 'CHMOD';
 describe(CMD, function () {
   let sandbox;
   const mockLog = {error: () => {}};
-  const mockClient = {reply: () => when.resolve()};
+  const mockClient = {reply: () => Promise.resolve()};
   const cmdFn = require(`../../../../src/commands/registration/site/${CMD.toLowerCase()}`).bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     mockClient.fs = {
-      chmod: () => when.resolve()
+      chmod: () => Promise.resolve()
     };
 
     sandbox.spy(mockClient, 'reply');
@@ -23,7 +23,7 @@ describe(CMD, function () {
     sandbox.restore();
   });
 
-  it('// unsuccessful | no file system', done => {
+  it('// unsuccessful | no file system', (done) => {
     delete mockClient.fs;
 
     cmdFn()
@@ -34,7 +34,7 @@ describe(CMD, function () {
     .catch(done);
   });
 
-  it('// unsuccessful | file system does not have functions', done => {
+  it('// unsuccessful | file system does not have functions', (done) => {
     mockClient.fs = {};
 
     cmdFn()
@@ -45,7 +45,7 @@ describe(CMD, function () {
     .catch(done);
   });
 
-  it('777 test // unsuccessful | file chmod fails', done => {
+  it('777 test // unsuccessful | file chmod fails', (done) => {
     mockClient.fs.chmod.restore();
     sandbox.stub(mockClient.fs, 'chmod').rejects(new Error('test'));
 
@@ -57,7 +57,7 @@ describe(CMD, function () {
     .catch(done);
   });
 
-  it('777 test // successful', done => {
+  it('777 test // successful', (done) => {
     cmdFn({log: mockLog, command: {arg: '777 test'}})
     .then(() => {
       expect(mockClient.fs.chmod.args[0]).to.eql(['test', 511]);

test/commands/registration/site/site.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 const bunyan = require('bunyan');
@@ -11,13 +11,13 @@ describe(CMD, function () {
   let sandbox;
   const log = bunyan.createLogger({name: 'site-test'});
   const mockClient = {
-    reply: () => when.resolve(),
+    reply: () => Promise.resolve(),
     commands: new FtpCommands()
   };
   const cmdFn = require(`../../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.stub(mockClient, 'reply').resolves();
   });

test/commands/registration/size.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,14 +6,14 @@ const CMD = 'SIZE';
 describe(CMD, function () {
   let sandbox;
   const mockLog = {error: () => {}};
-  const mockClient = {reply: () => when.resolve()};
+  const mockClient = {reply: () => Promise.resolve()};
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     mockClient.fs = {
-      get: () => when.resolve({size: 1})
+      get: () => Promise.resolve({size: 1})
     };
 
     sandbox.spy(mockClient, 'reply');

test/commands/registration/stat.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,15 +6,15 @@ const CMD = 'STAT';
 describe(CMD, function () {
   let sandbox;
   const mockLog = {error: () => {}};
-  const mockClient = {reply: () => when.resolve()};
+  const mockClient = {reply: () => Promise.resolve()};
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     mockClient.fs = {
-      get: () => when.resolve({}),
+      get: () => Promise.resolve({}),
-      list: () => when.resolve([])
+      list: () => Promise.resolve([])
     };
 
     sandbox.spy(mockClient, 'reply');

test/commands/registration/stor.spec.js

@@ -1,34 +1,41 @@
-const when = require('when');
+const Promise = require('bluebird');
 const bunyan = require('bunyan');
 const {expect} = require('chai');
 const sinon = require('sinon');
+const EventEmitter = require('events');
 
 const CMD = 'STOR';
 describe(CMD, function () {
   let sandbox;
   let log = bunyan.createLogger({name: CMD});
+  let emitter;
   const mockClient = {
     commandSocket: {
       pause: () => {},
       resume: () => {}
     },
-    reply: () => when.resolve(),
+    reply: () => Promise.resolve(),
     connector: {
-      waitForConnection: () => when.resolve({
+      waitForConnection: () => Promise.resolve({
         resume: () => {}
       }),
-      end: () => {}
+      end: () => Promise.resolve({})
     }
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     mockClient.fs = {
       write: () => {}
     };
 
+    emitter = new EventEmitter();
+    mockClient.emit = emitter.emit.bind(emitter);
+    mockClient.on = emitter.on.bind(emitter);
+    mockClient.once = emitter.once.bind(emitter);
+
     sandbox.spy(mockClient, 'reply');
   });
   afterEach(() => sandbox.restore());
@@ -53,7 +60,7 @@ describe(CMD, function () {
 
   it('// unsuccessful | connector times out', () => {
     sandbox.stub(mockClient.connector, 'waitForConnection').callsFake(function () {
-      return when.reject(new when.TimeoutError());
+      return Promise.reject(new Promise.TimeoutError());
     });
 
     return cmdFn({log, command: {arg: 'test.txt'}})
@@ -64,7 +71,7 @@ describe(CMD, function () {
 
   it('// unsuccessful | connector errors out', () => {
     sandbox.stub(mockClient.connector, 'waitForConnection').callsFake(function () {
-      return when.reject(new Error('test'));
+      return Promise.reject(new Error('test'));
     });
 
     return cmdFn({log, command: {arg: 'test.txt'}})
@@ -72,4 +79,20 @@ describe(CMD, function () {
       expect(mockClient.reply.args[0][0]).to.equal(550);
     });
   });
+
+  it('// unsuccessful | emits error event', () => {
+    sandbox.stub(mockClient.connector, 'waitForConnection').callsFake(function () {
+      return Promise.reject(new Error('test'));
+    });
+
+    let errorEmitted = false;
+    emitter.once('STOR', (err) => {
+      errorEmitted = !!err;
+    });
+
+    return cmdFn({log, command: {arg: 'test.txt'}})
+    .then(() => {
+      expect(errorEmitted).to.equal(true);
+    });
+  });
 });

test/commands/registration/stou.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -8,16 +8,16 @@ const CMD = 'STOU';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     mockClient.fs = {
-      get: () => when.resolve(),
+      get: () => Promise.resolve(),
-      getUniqueName: () => when.resolve('4')
+      getUniqueName: () => Promise.resolve('4')
     };
 
     sandbox.spy(mockClient, 'reply');

test/commands/registration/stru.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,12 +6,12 @@ const CMD = 'STRU';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/syst.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,12 +6,12 @@ const CMD = 'SYST';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     sandbox.spy(mockClient, 'reply');
   });

test/commands/registration/type.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -6,12 +6,12 @@ const CMD = 'TYPE';
 describe(CMD, function () {
   let sandbox;
   const mockClient = {
-    reply: () => when.resolve()
+    reply: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     mockClient.transferType = null;
     sandbox.spy(mockClient, 'reply');

test/commands/registration/user.spec.js

@@ -1,4 +1,4 @@
-const when = require('when');
+const Promise = require('bluebird');
 const {expect} = require('chai');
 const sinon = require('sinon');
 
@@ -9,14 +9,14 @@ describe(CMD, function () {
     error: () => {}
   };
   const mockClient = {
-    reply: () => when.resolve(),
+    reply: () => Promise.resolve(),
     server: {options: {}},
-    login: () => when.resolve()
+    login: () => Promise.resolve()
   };
   const cmdFn = require(`../../../src/commands/registration/${CMD.toLowerCase()}`).handler.bind(mockClient);
 
   beforeEach(() => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
     delete mockClient.username;
     mockClient.server.options = {};

test/connector/active.spec.js

@@ -6,9 +6,10 @@ const net = require('net');
 const tls = require('tls');
 
 const ActiveConnector = require('../../src/connector/active');
-const findPort = require('../../src/helpers/find-port');
+const {getNextPortFactory} = require('../../src/helpers/find-port');
 
 describe('Connector - Active //', function () {
+  let getNextPort = getNextPortFactory(1024);
   let PORT;
   let active;
   let mockConnection = {};
@@ -18,18 +19,18 @@ describe('Connector - Active //', function () {
   before(() => {
     active = new ActiveConnector(mockConnection);
   });
-  beforeEach(done => {
+  beforeEach((done) => {
-    sandbox = sinon.sandbox.create();
+    sandbox = sinon.createSandbox().usingPromise(Promise);
 
-    findPort()
+    getNextPort()
-    .then(port => {
+    .then((port) => {
       PORT = port;
       server = net.createServer()
-      .on('connection', socket => socket.destroy())
+      .on('connection', (socket) => socket.destroy())
       .listen(PORT, () => done());
     });
   });
-  afterEach(done => {
+  afterEach((done) => {
     sandbox.restore();
     server.close(done);
   });
@@ -57,7 +58,7 @@ describe('Connector - Active //', function () {
       expect(active.dataSocket).to.exist;
       return active.waitForConnection();
     })
-    .then(dataSocket => {
+    .then((dataSocket) => {
       expect(dataSocket.connected).to.equal(true);
       expect(dataSocket instanceof net.Socket).to.equal(true);
       expect(dataSocket instanceof tls.TLSSocket).to.equal(false);
@@ -66,14 +67,18 @@ describe('Connector - Active //', function () {
 
   it('upgrades to a secure connection', function () {
     mockConnection.secure = true;
-    mockConnection.server = {_tls: {}};
+    mockConnection.server = {
+      options: {
+        tls: {}
+      }
+    };
 
     return active.setupConnection('127.0.0.1', PORT)
     .then(() => {
       expect(active.dataSocket).to.exist;
       return active.waitForConnection();
     })
-    .then(dataSocket => {
+    .then((dataSocket) => {
       expect(dataSocket.connected).to.equal(true);
       expect(dataSocket instanceof net.Socket).to.equal(true);
       expect(dataSocket instanceof tls.TLSSocket).to.equal(true);