4.0.4

silly syntax error fixed (missing paren)

.gitignore

@@ -1,7 +1,13 @@
+app.js
+server.js
+greenlock.js
+.greenlockrc
+
 # Logs
 logs
 *.log
 npm-debug.log*
+.vscode
 
 # Runtime data
 pids

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "bracketSpacing": true,
+  "printWidth": 120,
+  "tabWidth": 4,
+  "trailingComma": "none",
+  "useTabs": false
+}

LICENSE

@@ -1,21 +1,375 @@
-MIT License
+Copyright 2015-2019 AJ ONeal
 
-Copyright (c) 2016 Daplie, Inc
+Mozilla Public License Version 2.0
+==================================
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+1. Definitions
+--------------
 
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.

README.md

@@ -1,208 +1,536 @@
-<!-- BANNER_TPL_BEGIN -->
+# [Greenlock Express v4](https://git.rootprojects.org/root/greenlock-express.js) is Let's Encrypt for Node
 
-About Daplie: We're taking back the Internet!
---------------
+| Built by [Root](https://therootcompany.com) for [Hub](https://rootprojects.org/hub/) |
 
-Down with Google, Apple, and Facebook!
+![Greenlock Logo](https://git.rootprojects.org/root/greenlock.js/raw/branch/master/logo/greenlock-1063x250.png "Greenlock Logo")
 
-We're re-decentralizing the web and making it read-write again - one home cloud system at a time.
+### Free SSL for Node Web Servers
 
-Tired of serving the Empire? Come join the Rebel Alliance:
+Greenlock Express is a **Web Server** with **Fully Automated HTTPS** and renewals.
 
-<a href="mailto:jobs@daplie.com">jobs@daplie.com</a> | [Invest in Daplie on Wefunder](https://daplie.com/invest/) | [Pre-order Cloud](https://daplie.com/preorder/), The World's First Home Server for Everyone
-
-<!-- BANNER_TPL_END -->
-
-greenlock-express (letsencrypt-express)
-=================
-
-[![Join the chat at https://gitter.im/Daplie/letsencrypt-express](https://badges.gitter.im/Daplie/letsencrypt-express.svg)](https://gitter.im/Daplie/letsencrypt-express?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-
-| [greenlock (lib)](https://git.daplie.com/Daplie/node-greenlock)
-| [greenlock-cli](https://git.daplie.com/Daplie/greenlock-cli)
-| **greenlock-express**
-| [greenlock-cluster](https://git.daplie.com/Daplie/greenlock-cluster)
-| [greenlock-koa](https://git.daplie.com/Daplie/greenlock-koa)
-| [greenlock-hapi](https://git.daplie.com/Daplie/greenlock-hapi)
-|
-
-Free SSL and managed or automatic HTTPS for node.js with Express, Koa, Connect, Hapi, and all other middleware systems.
-
-* Automatic Registration via SNI (`httpsOptions.SNICallback`)
-  * **registrations** require an **approval callback** in *production*
-* Automatic Renewal (around 80 days)
-  * **renewals** are *fully automatic* and happen in the *background*, with **no downtime**
-* Automatic vhost / virtual hosting
-
-All you have to do is start the webserver and then visit it at its domain name.
-
-Install
-=======
+You define your app and let Greenlock handle issuing and renewing Free SSL Certificates.
 
 ```bash
-npm install --save greenlock-express@2.x
+npm init
+npm install --save greenlock-express@v4
 ```
 
-**Important**: Use node v4.5+ or v6.x, node <= v4.4 has a [known bug](https://github.com/nodejs/node/issues/8053) in the `Buffer` implementation.
+`server.js`:
 
-QuickStart
-==========
+```js
+"use strict";
 
-Here's a completely working example that will get you started:
+var app = require("./app.js");
+
+require("greenlock-express")
+    .init({
+        packageRoot: __dirname,
+        configDir: "./greenlock.d",
+
+        // contact for security and critical bug notices
+        maintainerEmail: "jon@example.com",
+
+        // whether or not to run at cloudscale
+        cluster: false
+    })
+    // Serves on 80 and 443
+    // Get's SSL certificates magically!
+    .serve(app);
+```
+
+`./greenlock.d/config.json`:
+
+```json
+{ "sites": [{ "subject": "example.com", "altnames": ["example.com"] }] }
+```
+
+# Let's Encrypt for...
+
+-   IoT
+-   Enterprise On-Prem
+-   Local Development
+-   Home Servers
+-   Quitting Heroku
+
+# Features
+
+-   [x] Let's Encrypt v2 (November 2019)
+    -   [x] ACME Protocol (RFC 8555)
+    -   [x] HTTP Validation (HTTP-01)
+    -   [x] DNS Validation (DNS-01)
+    -   [ ] ALPN Validation (TLS-ALPN-01)
+        -   Need ALPN validation? [contact us](mailto:greenlock-support@therootcompany.com)
+-   [x] Automated HTTPS
+    -   [x] Fully Automatic Renewals every 45 days
+    -   [x] Free SSL
+    -   [x] **Wildcard** SSL
+    -   [x] **Localhost** certificates
+    -   [x] HTTPS-enabled Secure **WebSockets** (`wss://`)
+    -   [x] **Cloud-ready** with Node `cluster`.
+-   [x] Fully customizable
+    -   [x] **Reasonable defaults**
+    -   [x] Domain Management
+    -   [x] Key and Certificate Management
+    -   [x] ACME Challenge Plugins
+
+# Compatibility
+
+Works with _any_ node http app, including
+
+-   [x] Express
+-   [x] Koa
+-   [x] hapi
+-   [x] rill
+-   [x] http2
+-   [x] cluster
+-   [x] etc...
+
+# v4 QuickStart
+
+Serving sites with Free SSL is as easy as 1, 2, 3... 4
+
+## Overview
+
+1. Create a Project with Greenlock Express
+    - `server.js`
+    - `app.js`
+2. Setup the config file (or database)
+    - `.greenlockrc`
+    - `greenlock.d/config.json`
+3. Add Domains
+    - `npx greenlock add --subject example.com --altnames example.com`
+4. Hello, World!
+    - `npm start -- --staging`
+
+### TL;DR
+
+If you're familiar with node, npm, and npx: this is all you need to do:
+
+```bash
+npm init
+npm install --save greenlock-express@v4
+
+npx greenlock init --config-dir greenlock.d --maintainer-email jon@example.com
+npx greenlock add --subject example.com --altnames example.com
+
+npm start -- --staging
+```
+
+Once you've tested that that works, you can change `app.js` to suit your needs replace the built-in callbacks for things like certificate storage as you like.
+
+## 1. Create your Project
+
+If you need to install Node.js, do so:
+
+Mac, Linux:
+
+```bash
+curl -fsS https://webinstall.dev/node | bash
+```
+
+Windows 10:
+
+```pwsh
+curl -fsSA "MS" https://webinstall.dev/node | powershell
+```
+
+Then create a directory for your project, and initialize it:
+
+```bash
+mkdir -p my-sites
+pushd my-sites
+npm init
+npm install --save greenlock-express@v4
+```
+
+## 2. Initialize and Config (Dir or DB)
+
+You can use **local file storage** or a **database**. The default is to use file storage.
+
+You'll need to create `server.js` and `greenlock.d/config.json`. You can do so using the CLI, API, or by hand.
+
+### Using the CLI (simplest, recommended)
+
+Anytime you install an npm module that contains an executable,
+you can run it using `npx`.
+
+To initialize the Greenlock config, run `npx greenlock init`:
+
+```bash
+npx greenlock init --config-dir ./greenlock.d --maintainer-email 'jon@example.com'
+```
+
+### By Hand (for advanced users)
+
+Create `server.js` like so:
+
+`server.js`:
+
+```js
+'use strict';
+
+var app = require('./app.js');
+
+require('greenlock-express')
+    .init({
+        packageRoot: __dirname,
+
+        // where to look for configuration
+        configDir: './greenlock.d',
+
+        // whether or not to run at cloudscale
+        cluster: false
+    })
+    // Serves on 80 and 443
+    // Get's SSL certificates magically!
+    .serve(app);
+```
+
+Create `app.js` like so:
 
 `app.js`:
-```javascript
+
+```js
 'use strict';
 
-require('greenlock-express').create({
+// Here's a vanilla HTTP app to start,
+// but feel free to replace it with Express, Koa, etc
+var app = function(req, res) {
+    res.end('Hello, Encrypted World!');
+};
 
-  server: 'staging'
-
-, email: 'john.doe@example.com'
-
-, agreeTos: true
-
-, approveDomains: [ 'example.com' ]
-
-, app: require('express')().use('/', function (req, res) {
-    res.end('Hello, World!');
-  })
-
-}).listen(80, 443);
+module.exports = app;
 ```
 
-Certificates will be stored in `~/letsencrypt`.
+Greenlock uses `.greenlockrc` to figure out whether to use the file system or a database for config,
+as well as where its root directory is.
 
-**Important**:
+`.greenlockrc`
 
-You must set `server` to `https://acme-v01.api.letsencrypt.org/directory` **after**
-you have tested that your setup works.
+```json
+{"manager":{"module":"@greenlock/manager"},"configDir":"greenlock.d"}
+```
 
-Why You Must Use 'staging' First
---------------------------------
+The `greenlock.d/config.json` is NOT intended to be edited by hand, as it is a substitute for a database, but it looks like this:
 
-There are a number of common problems related to system configuration -
-firewalls, ports, permissions, etc - that you are likely to run up against
-when using greenlock for your first time.
+```json
+{ "defaults": { "subscriberEmail": "john.doe@example.com" }, "sites": [] }
+```
 
-In order to avoid being blocked by hitting rate limits with bad requests,
-you should always test against the `'staging'` server
-(`https://acme-staging.api.letsencrypt.org/directory`) first.
+## 3. Add Sites
 
-Migrating from v1.x
-===================
+For security, you must specify which sites you allow to request certificates. If you need this to be dynamic (i.e. checking a database or API, see the section below on custom site managers).
 
-Whereas v1.x had a few hundred lines of code, v2.x is a single small file of about 50 lines.
+Every site has a "subject" (its primary domain name) and one or more "altnames" (secondary or related domain names on the same certificate).
 
-A few important things to note:
+### Using CLI (simple, recommended)
 
-* Delete your v1.x `~/letsencrypt` directory, otherwise you get this:
-  * `{ type: 'urn:acme:error:malformed', detail: 'Parse error reading JWS', status: 400 }`
-* `approveRegistration` has been replaced by `approveDomains`
-* All of the behavior has moved to the various plugins, which each have their own options
-* Use https and http directly, don't rely on the silly `.listen()` helper. It's just there for looks.
-* `lex.createAcmeResponder()` is now `lex.middleware(require('redirect-https')())` or `lex.middleware(app)`
+Simply supply the names of sites that you manage and they will be added to the file system config, or database.
 
-Usage
-=====
+```bash
+npx greenlock add --subject example.com --altnames example.com,www.example.com
+```
 
-The oversimplified example was the bait
-(because everyone seems to want an example that fits in 3 lines, even if it's terribly bad practices),
-now here's the switch:
+### By Hand (debugging only)
 
-`serve.js`:
-```javascript
+You should NOT edit `greenlock.d/config.json` with your own tools. Use `greenlock.manager.add({})` instead.
+
+`greenlock.d/config.json`:
+
+<!-- TODO update manager to write array rather than object -->
+
+```json
+{ "sites": [{ "subject": "example.com", "altnames": [ "example.com", "www.example.com" ] }] }
+```
+
+## 4. Hello, Encrypted World!
+
+That was it! Now you can run your server!
+
+When you run `npm start`, it will automatically run `node server.js` (or `package.json.scripts.start`).
+
+For arguments that `npm start` should ignore, place them after `--`.
+
+Here we use `--staging` in order to tell greenlock to issue test certificates rather than real certificates.
+
+```bash
+# Note: you can use npm start to run server.js with the --staging flag set
+npm start -- --staging
+```
+
+```txt
+> my-project@1.0.0 start /srv/www/my-project
+> node server.js
+
+Listening on 0.0.0.0:80 for ACME challenges and HTTPS redirects
+Listening on 0.0.0.0:443 for secure traffic
+```
+
+If everything worked you can visit your site in your browser, and after a few seconds you'll get a certificate warning and, after that, see a "Hello World" message. The debug (staging) certificates will be saved in `greenlock.d/staging`. Run again without `--staging` and you will get real certificates.
+
+### Season to taste
+
+Now you're ready to update `app.js` with your code. For example, try this next:
+
+```bash
+npm install --save express
+mkdir -p public
+echo '<h1>Hello!</h1>' >> public/index.html
+```
+
+`app.js`:
+
+```js
 'use strict';
 
-// returns an instance of node-greenlock with additional helper methods
-var lex = require('greenlock-express').create({
-  // set to https://acme-v01.api.letsencrypt.org/directory in production
-  server: 'staging'
+var path = require('path');
+var express = require('express');
+var app = express();
 
-// If you wish to replace the default plugins, you may do so here
-//
-, challenges: { 'http-01': require('le-challenge-fs').create({ webrootPath: '/tmp/acme-challenges' }) }
-, store: require('le-store-certbot').create({ webrootPath: '/tmp/acme-challenges' })
+app.get('/', express.static(path.join(__dirname, "public")));
 
-// You probably wouldn't need to replace the default sni handler
-// See https://git.daplie.com/Daplie/le-sni-auto if you think you do
-//, sni: require('le-sni-auto').create({})
+module.exports = app;
 
-, approveDomains: approveDomains
-});
-```
-
-```javascript
-function approveDomains(opts, certs, cb) {
-  // This is where you check your database and associated
-  // email addresses with domains and agreements and such
-
-
-  // The domains being approved for the first time are listed in opts.domains
-  // Certs being renewed are listed in certs.altnames
-  if (certs) {
-    opts.domains = certs.altnames;
-  }
-  else {
-    opts.email = 'john.doe@example.com';
-    opts.agreeTos = true;
-  }
-
-  // NOTE: you can also change other options such as `challengeType` and `challenge`
-  // opts.challengeType = 'http-01';
-  // opts.challenge = require('le-challenge-fs').create({});
-
-  cb(null, { options: opts, certs: certs });
+// for development and debugging
+if (require.main === module) {
+    require('http').createServer(app).listen(3000, function () {
+        console.info("Listening for HTTP on", this.address());
+    });
 }
 ```
 
+# Walkthrough
 
-```javascript
-// handles acme-challenge and redirects to https
-require('http').createServer(lex.middleware(require('redirect-https')())).listen(80, function () {
-  console.log("Listening for ACME http-01 challenges on", this.address());
-});
+For a more detail read the full
+[WALKTHROUGH](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/WALKTHROUGH.md).
+
+# Examples
+
+To see all of the examples, just browse [greenlock-express.js/examples/](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples)
+
+|        Example         | Location + Description                                                                                                                     |
+| :--------------------: | :----------------------------------------------------------------------------------------------------------------------------------------- |
+|        Express         | [./examples/express/][ex-express] how to export an express app                                                                             |
+|    Node's **http2**    | [./examples/http2/][ex-http2] how to use Node's built-in http2 server                                                                      |
+|      Node's https      | [./examples/https][ex-https] how to customize the https server                                                                             |
+|     **WebSockets**     | [./examples/websockets/][ex-websockets] how to use `on('upgrade')`                                                                         |
+| <span>Socket.IO</span> | [./examples/socket.io][ex-socketio] how to overcomplicate a persistent connection                                                          |
+|        Cluster         | [./examples/cluster/][ex-cluster] how to use Node's built-in clustering with master and worker processes                                   |
+|     **Wildcards**      | [coming someday][ex-wildcards] (ask to help create this) how to use DNS-01 for wildcard certs                                              |
+|     **Localhost**      | [coming someday][ex-localhost] (ask to help create this) how to use DNS-01 for domains that resolve to private networks, such as 127.0.0.1 |
+|       **CI/CD**        | [coming someday][ex-cicd] (ask to help create this) how to use the `--staging` environment for test deployments                            |
+|       HTTP Proxy       | [examples/http-proxy][ex-http-proxy] how to (reverse) proxy decrypted traffic to another server                                            |
+|           -            | Build your own<br>Be sure to tell me about it (open an issue)                                                                              |
+
+[ex-express]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/express/
+[ex-http2]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/http2/
+[ex-https]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/https/
+[ex-websockets]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/websockets/
+[ex-socketio]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/socketo.io/
+[ex-cluster]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/cluster/
+[ex-wildcards]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/wildcards/
+[ex-localhost]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/localhost/
+[ex-cicd]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/ci-cd/
+[ex-http-proxy]: https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/http-proxy/
 
 
+# FAQ
+## 1. But did YOU read the QuickStart?
 
-var app = require('express')();
-app.use('/', function (req, res) {
-  res.end('Hello, World!');
-});
+99% of the questions I get are answered in the QuickStart, or in the Examples.
 
-// handles your app
-require('https').createServer(lex.httpsOptions, lex.middleware(app)).listen(443, function () {
-  console.log("Listening for ACME tls-sni-01 challenges and serve app on", this.address());
-});
+Before you go into your specific use case, just try out the QuickStart from start to finish so that you can see that the default setup works, you get feel for the "lay of the land", and you know what to edit.
+
+## 2. How to use JavaScript configuration?
+
+You don't. It's JSON on purpose.
+
+The configuration has to be serializable (i.e. could go in a database).
+
+The config file is meant for **simple** use cases, for the average dev and it is managed with `npx greenlock ...`, as shown in the QuickStart.
+
+If you have a **dynamic** or **advanced** use case (i.e. you need stuff in a database, or to change config on-the-fly), you can use the Greenlock API (not Greenlock Express) and you'll love it.
+
+If you're layering a lot of **complexity** with dev ops tools, but you don't really understand the tools that well (i.e. **Docker**), either use ENVIRONMENT variables or put the `npx greenlock ...` commands in your setup script. You MUST use a database for **lambda** "cloud functions" and such.
+
+You can also just mangle the Greenlock API to do what you want... but I don't recommend it. Keep it simple and your future self with thank you.
+
+General rule of thumb: commit code, not data / config.
+
+## 3. How to use non-standard ports (not 80, 443)?
+
+You don't. Not usually.
+
+Let's Encrypt **REQUIRES port 80** for HTTP-01 challenges.
+
+But if you're using DNS-01 or you have a proxy in place, just use the raw node server. See these examples:
+
+- [examples/http/server.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/http/server.js)
+- [examples/https/server.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/https/server.js)
+
+If you want to use Greenlock as a proxy, see this example:
+
+- [examples/http-proxy/server.js](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/http-proxy/server.js)
+
+# Troubleshooting
+
+### What if the example didn't work?
+
+Double check the following:
+
+-   **Public Facing IP** for `http-01` challenges
+    -   Are you running this _as_ a public-facing webserver (good)? or localhost (bad)?
+    -   Does `ifconfig` show a public address (good)? or a private one - 10.x, 192.168.x, etc (bad)?
+    -   If you're on a non-public server, are you using the `dns-01` challenge?
+-   **valid email**
+    -   You MUST set `maintainerEmail` to a **valid address**
+    -   MX records must validate (`dig MX example.com` for `'john@example.com'`)
+-   **valid DNS records**
+    -   Must have public DNS records (test with `dig +trace A example.com; dig +trace www.example.com` for `[ 'example.com', 'www.example.com' ]`)
+-   **write access**
+    -   You MUST set `configDir` to a writeable location (test with `touch ./greenlock.d/config.json`)
+-   **port binding privileges**
+    -   You MUST be able to bind to ports 80 and 443
+    -   You can do this via `sudo` or [`setcap`](https://gist.github.com/firstdoit/6389682)
+-   **API limits**
+    -   You MUST NOT exceed the API [**usage limits**](https://letsencrypt.org/docs/staging-environment/) per domain, certificate, IP address, etc
+-   **Red Lock, Untrusted**
+    -   You MUST switch from `npm start -- --staging` to `npm start` to use the **production** server
+    -   The API URL should not have 'acme-staging-v02', but should have 'acme-v02'
+
+# Using a Database, S3, etc
+
+If you have a small site, the default file storage will work well for you.
+
+If you have many sites with many users, you'll probably want to store config in a database of some sort.
+
+See the section on **Custom** callbacks and plugins below.
+
+# Advanced Configuration
+
+All of the advanced configuration is done by replacing the default behavior with callbacks.
+
+You can whip up your own, or you can use something that's published to npm.
+
+See the section on **Custom** callbacks and plugins below.
+
+# Easy to Customize
+
+<!-- greenlock-manager-test => greenlock-manager-custom -->
+
+<!--
+- [greenlock.js/examples/](https://git.rootprojects.org/root/greenlock.js/src/branch/master/examples)
+-->
+
+-   [Custom Domain Management](https://git.rootprojects.org/root/greenlock-manager-test.js)
+    -   edit `server.js` and/or `.greenlockrc` to switch from the default `configDir` manager to your config system or database
+    -   CLI example: `npx greenlock init --manager ./path-or-npm-name.js --manager-FOO 'set option FOO'`
+-   [Custom Key & Cert Storage](https://git.rootprojects.org/root/greenlock-store-test.js)
+    -   edit the `defaults` section of `greenlock.d/config.json` to change the certificate store or database
+    -   CLI example: `npx greenlock defaults --store greenlock-store-fs --store-base-path ./greenlock.d`
+-   [Custom ACME HTTP-01 Challenges](https://git.rootprojects.org/root/acme-http-01-test.js)
+    -   edit the `defaults` section of `greenlock.d/config.json` to change the challenges by hand
+    -   CLI example: `npx greenlock defaults --challenge-http-01 ./you-http-01.js`
+-   [Custom ACME DNS-01 Challenges](https://git.rootprojects.org/root/acme-dns-01-test.js)
+    -   edit the `defaults` section of `greenlock.d/config.json` to change the challenges by hand
+    -   CLI example: `npx greenlock defaults --challenge-dns-01 acme-dns-01-ovh --challenge-dns-01-token xxxx`
+    -   Per-site example: `npx greenlock update --subject example.com --challenge-dns-01 ./your-dns-01.js`
+    -   API example:
+        ```js
+        greenlock.sites.set({
+            subject: "example.com",
+            challenges: {
+                "dns-01": {
+                    module: "my-npm-module-name",
+                    foo: "some option",
+                    bar: "some other option"
+                }
+            }
+        });
+        ```
+
+If you're using the default `configDir` management you can edit `greenlock.d/config.json` by hand to change
+which default and per-site modules are used.
+
+You can use the CLI, even if you're using a database, buckets, or your own file storage.
+
+You can also use the API, particularly if you need to set values dynamically per-site or per-user
+rather than using the global defaults. The certificate store and all challenges can be set
+per-site, but most per-site use cases are for DNS-01.
+
+# Ready-made Integrations
+
+Greenlock Express integrates between Let's Encrypt's ACME Challenges and many popular services.
+
+| Type        | Service                                                                             | Plugin                   |
+| ----------- | ----------------------------------------------------------------------------------- | ------------------------ |
+| dns-01      | CloudFlare                                                                          | acme-dns-01-cloudflare   |
+| dns-01      | [Digital Ocean](https://git.rootprojects.org/root/acme-dns-01-digitalocean.js)      | acme-dns-01-digitalocean |
+| dns-01      | [DNSimple](https://git.rootprojects.org/root/acme-dns-01-dnsimple.js)               | acme-dns-01-dnsimple     |
+| dns-01      | [DuckDNS](https://git.rootprojects.org/root/acme-dns-01-duckdns.js)                 | acme-dns-01-duckdns      |
+| http-01     | File System / [Web Root](https://git.rootprojects.org/root/acme-http-01-webroot.js) | acme-http-01-webroot     |
+| dns-01      | [GoDaddy](https://git.rootprojects.org/root/acme-dns-01-godaddy.js)                 | acme-dns-01-godaddy      |
+| dns-01      | [Gandi](https://git.rootprojects.org/root/acme-dns-01-gandi.js)                     | acme-dns-01-gandi        |
+| dns-01      | [NameCheap](https://git.rootprojects.org/root/acme-dns-01-namecheap.js)             | acme-dns-01-namecheap    |
+| dns-01      | [Name&#46;com](https://git.rootprojects.org/root/acme-dns-01-namedotcom.js)         | acme-dns-01-namedotcom   |
+| dns-01      | Route53 (AWS)                                                                       | acme-dns-01-route53      |
+| http-01     | S3 (AWS, Digital Ocean, Scaleway)                                                   | acme-http-01-s3          |
+| dns-01      | [Vultr](https://git.rootprojects.org/root/acme-dns-01-vultr.js)                     | acme-dns-01-vultr        |
+| dns-01      | [Build your own](https://git.rootprojects.org/root/acme-dns-01-test.js)             | acme-dns-01-test         |
+| http-01     | [Build your own](https://git.rootprojects.org/root/acme-http-01-test.js)            | acme-http-01-test        |
+| tls-alpn-01 | [Contact us](mailto:support@therootcompany.com)                                     | -                        |
+
+Example Usage:
+
+```bash
+npx greenlock defaults --challenge-dns-01 acme-dns-01-ovh --challenge-dns-01-token xxxx
+npx greenlock defaults --challenge-http-01 acme-http-01-s3 --challenge-http-01-bucket my-bucket
 ```
 
-**Security Warning**:
+Search `acme-http-01-` or `acme-dns-01-` on npm to find more.
 
-If you don't do proper checks in `approveDomains(opts, certs, cb)`
-an attacker will spoof SNI packets with bad hostnames and that will
-cause you to be rate-limited and or blocked from the ACME server.
+# Full Documentation
 
+<!--
+- Greenlock CLI
+- Greenlock JavaScript API
+-->
 
-API
-===
+Most of the documentation is done by use-case examples, as shown up at the top of the README.
 
-This module is an elaborate ruse (to provide an oversimplified example and to nab some SEO).
+We're working on more comprehensive documentation for this newly released version.
+**Please open an issue** with questions in the meantime.
 
-The API is actually located at [node-greenlock options](https://git.daplie.com/Daplie/node-greenlock)
-(because all options are simply passed through to `node-greenlock` proper without modification).
+# Commercial Support
 
-The only "API" consists of two options, the rest is just a wrapper around `node-greenlock` to take LOC from 15 to 5:
+Do you need...
 
-* `opts.app` An express app in the format `function (req, res) { ... }` (no `next`).
-* `lex.listen(plainPort, tlsPort)` Accepts port numbers (or arrays of port numbers) to listen on.
+-   training?
+-   specific features?
+-   different integrations?
+-   bugfixes, on _your_ timeline?
+-   custom code, built by experts?
+-   commercial support and licensing?
 
-Brief overview of some simple options for `node-greenlock`:
+You're welcome to [contact us](mailto:aj@therootcompany.com) in regards to IoT, On-Prem,
+Enterprise, and Internal installations, integrations, and deployments.
 
-* `opts.server` set to https://acme-v01.api.letsencrypt.org/directory in production
-* `opts.email` The default email to use to accept agreements.
-* `opts.agreeTos` When set to `true`, this always accepts the LetsEncrypt TOS. When a string it checks the agreement url first.
-* `opts.approveDomains` can be either of:
-  * An explicit array of allowed domains such as `[ 'example.com', 'www.example.com' ]`
-  * A callback `function (opts, certs, cb) { cb(null, { options: opts, certs: certs }); }` for setting `email`, `agreeTos`, `domains`, etc (as shown in usage example above)
-* `opts.renewWithin` is the **maximum** number of days (in ms) before expiration to renew a certificate.
-* `opts.renewBy` is the **minimum** number of days (in ms) before expiration to renew a certificate.
+We have both commercial support and commercial licensing available.
+
+We also offer consulting for all-things-ACME and Let's Encrypt.
+
+# Legal &amp; Rules of the Road
+
+Greenlock&trade; is a [trademark](https://rootprojects.org/legal/#trademark) of AJ ONeal
+
+The rule of thumb is "attribute, but don't confuse". For example:
+
+> Built with [Greenlock Express](https://git.rootprojects.org/root/greenlock.js) (a [Root](https://rootprojects.org) project).
+
+Please [contact us](mailto:aj@therootcompany.com) if you have any questions in regards to our trademark,
+attribution, and/or visible source policies. We want to build great software and a great community.
+
+[Greenlock&trade;](https://git.rootprojects.org/root/greenlock.js) |
+MPL-2.0 |
+[Terms of Use](https://therootcompany.com/legal/#terms) |
+[Privacy Policy](https://therootcompany.com/legal/#privacy)

WALKTHROUGH.md

@@ -0,0 +1,256 @@
+# Greenlock Express Walkthrough
+
+This will show you the basics of how to
+
+1. Create a node project
+2. Create an http app (i.e. express)
+3. Serve with Greenlock Express
+4. Manage SSL Certificates and Domains
+
+## 1. Create a node project
+
+Create an empty node project.
+
+Be sure to fill out the package name, version, and an author email.
+
+```bash
+mkdir ~/my-project
+pushd ~/my-project
+npm init
+```
+
+## 2. Create an http app (i.e. express)
+
+This example is shown with Express, but any node app will do. Greenlock
+works with everything.
+(or any node-style http app)
+
+`my-express-app.js`:
+
+```js
+"use strict";
+
+// A plain, node-style app
+
+function myPlainNodeHttpApp(req, res) {
+    res.end("Hello, Encrypted World!");
+}
+
+// Wrap that plain app in express,
+// because that's what you're used to
+
+var express = require("express");
+var app = express();
+app.get("/", myPlainNodeHttpApp);
+
+// export the app normally
+// do not .listen()
+
+module.exports = app;
+```
+
+## 3. Serve with Greenlock Express
+
+Greenlock Express is designed with these goals in mind:
+
+-   Simplicity and ease-of-use
+-   Performance and scalability
+-   Configurability and control
+
+You can start with **near-zero configuration** and
+slowly add options for greater performance and customization
+later, if you need them.
+
+`server.js`:
+
+```js
+"use strict";
+
+//var pkg = require("./package.json");
+var app = require("./app.js");
+
+require("greenlock-express")
+    .init({
+        // where to find .greenlockrc and set default paths
+        packageRoot: __dirname,
+
+        // where config and certificate stuff go
+        configDir: "./greenlock.d",
+
+        // contact for security and critical bug notices
+        maintainerEmail: pkg.author,
+
+        // name & version for ACME client user agent
+        //packageAgent: pkg.name + "/" + pkg.version,
+
+        // whether or not to run at cloudscale
+        cluster: false
+    })
+    .serve(app);
+```
+
+And start your server:
+
+```bash
+# Allow non-root node to use ports 80 (HTTP) and 443 (HTTPS)
+sudo setcap 'cap_net_bind_service=+ep' $(which node)
+```
+
+```bash
+# `npm start` will call `node ./server.js` by default
+npm start
+```
+
+```bash
+# use --staging to use the development API until you're ready to get real certificates
+npm start -- --staging
+```
+
+```txt
+Greenlock v4.0.0
+Greenlock Config Dir/File: ./greenlock.d/config.json
+
+Listening on 0.0.0.0:80 for ACME challenges and HTTPS redirects
+Listening on 0.0.0.0:443 for secure traffic
+```
+
+## 4. Manage SSL Certificates and Domains
+
+The management API is built to work with Databases, S3, etc.
+
+By default, it's just a simple config file and directory.
+
+```bash
+# see which manager and what options are in use
+cat .greenlockrc
+```
+
+<details>
+<summary>Example Output</summary>
+
+```json
+{
+    "manager": {
+        "module": "@greenlock/manager"
+    },
+    "configDir": "./greenlock.d"
+}
+```
+
+</details>
+
+```bash
+# show the global defaults with the CLI
+npx greenlock defaults
+```
+
+```js
+// show the global defaults with the API
+var defaults = await greenlock.defaults();
+```
+
+<details>
+<summary>Example Output</summary>
+
+```json
+{
+    "store": {
+        "module": "greenlock-store-fs",
+        "basePath": "./greenlock.d"
+    },
+    "challenges": {
+        "http-01": {
+            "module": "acme-http-01-standalone"
+        }
+    },
+    "renewOffset": "-45d",
+    "renewStagger": "3d",
+    "accountKeyType": "EC-P256",
+    "serverKeyType": "RSA-2048",
+    "subscriberEmail": "jon@example.com",
+    "agreeToTerms": true
+}
+```
+
+</details>
+
+```bash
+# show per-site configs with the CLI
+npx greenlock config --subject example.com
+```
+
+```js
+// show a site config with the API
+greenlock.sites.get({ subject: "example.com" });
+```
+
+<details>
+<summary>Example Output</summary>
+
+```json
+{
+    "subject": "example.com",
+    "altnames": ["example.com"],
+    "renewAt": 1576638107754,
+    "defaults": {
+        "store": {
+            "module": "greenlock-store-fs",
+            "basePath": "./greenlock.d"
+        },
+        "challenges": {
+            "http-01": {
+                "module": "acme-http-01-standalone"
+            }
+        }
+    }
+}
+```
+
+</details>
+
+Management can be done via the **CLI** or the JavaScript [**API**](https://git.rootprojects.org/root/greenlock.js).
+Since this is the QuickStart, we'll demo the **CLI**:
+
+You need to create a Let's Encrypt _subscriber account_, which can be done globally, or per-site.
+All individuals, and most businesses, should set this globally:
+
+```bash
+# Set a global subscriber account with the CLI
+npx greenlock defaults --subscriber-email 'mycompany@example.com' --agree-to-terms true
+```
+
+```js
+// set a global subscriber account with the API
+greenlock.manager.defaults({
+    subscriberEmail: "mycompany@example.com",
+    agreeToTerms: true
+});
+```
+
+<!-- todo print where the key was saved -->
+
+A Let's Encrypt SSL certificate has a "Subject" (Primary Domain) and up to 100 "Alternative Names"
+(of which the first _must_ be the subject).
+
+```bash
+# Add a certificate with specific domains with the CLI
+npx greenlock add --subject example.com --altnames example.com,www.example.com
+```
+
+```js
+// Add a certificate with specific domains with the API
+greenlock.sites.add({
+    subject: "example.com",
+    altnames: ["example.com"]
+});
+```
+
+<!-- todo print where the cert was saved -->
+
+Note: **Localhost**, **Wildcard**, and Certificates for Private Networks require
+[**DNS validation**](https://git.rootprojects.org/root/greenlock-exp).
+
+-   DNS Validation
+    -   [**Wildcards**](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/wildcards/) (coming soon)
+    -   [**Localhost**](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/localhost/) (coming soon)
+    -   [**CI/CD**](https://git.rootprojects.org/root/greenlock-express.js/src/branch/master/examples/ci-cd/) (coming soon)

config.js

@@ -0,0 +1,20 @@
+"use strict";
+
+var path = require("path");
+module.exports = {
+    email: "jon.doe@example.com",
+    configDir: path.join(__dirname, "acme"),
+    srv: "/srv/www/",
+    api: "/srv/api/",
+    proxy: {
+        "example.com": "http://localhost:4080",
+        "*.example.com": "http://localhost:4080"
+    },
+
+    // DNS-01 challenges only
+    challenges: {
+        "*.example.com": require("acme-dns-01-YOUR_DNS_HOST").create({
+            token: "xxxx"
+        })
+    }
+};

demo.js

@@ -0,0 +1,35 @@
+"use strict";
+
+require("./")
+    .init(initialize)
+    .serve(worker)
+    .master(function() {
+        console.log("Hello from master");
+    });
+
+function initialize() {
+    var pkg = require("./package.json");
+    var config = {
+        package: {
+            name: "Greenlock_Express_Demo",
+            version: pkg.version,
+            author: pkg.author
+        },
+        staging: true,
+        cluster: true,
+
+        notify: function(ev, params) {
+            console.info(ev, params);
+        }
+    };
+    return config;
+}
+
+function worker(glx) {
+    console.info();
+    console.info("Hello from worker #" + glx.id());
+
+    glx.serveApp(function(req, res) {
+        res.end("Hello, Encrypted World!");
+    });
+}

dist/etc/systemd/system/greenlock-express.service

@@ -0,0 +1,53 @@
+# sudo systemctl daemon-reload
+# sudo systemctl restart greenlock-express
+# sudo journalctl -xefu greenlock-express
+[Unit]
+Description=Greenlock Static Server
+Documentation=https://git.coolaj86.com/coolaj86/greenlock-express.js/
+After=network.target
+Wants=network.target systemd-networkd-wait-online.service
+
+[Service]
+# Restart on crash (bad signal), 'clean' failure (error exit code), everything
+# Allow up to 3 restarts within 10 seconds
+# (it's unlikely that a user or properly-running script will do this)
+Restart=always
+StartLimitInterval=10
+StartLimitBurst=3
+
+# User and group the process will run as
+# (git is the de facto standard on most systems)
+User=ubuntu
+Group=ubuntu
+
+WorkingDirectory=/srv/www
+# custom directory cannot be set and will be the place where gitea exists, not the working directory
+ExecStart=/opt/node/bin/node /opt/greenlock-express.js/server.js /opt/greenlock-express.js/config.js
+
+# Limit the number of file descriptors and processes; see `man systemd.exec` for more limit settings.
+# greenlock is not expected to use more than this.
+LimitNOFILE=1048576
+LimitNPROC=64
+
+# Use private /tmp and /var/tmp, which are discarded after gitea stops.
+PrivateTmp=true
+# Use a minimal /dev
+PrivateDevices=true
+# Hide /home, /root, and /run/user. Nobody will steal your SSH-keys.
+ProtectHome=true
+# Make /usr, /boot, /etc and possibly some more folders read-only.
+ProtectSystem=full
+# ... except /opt/greenlock-express.js/acme because we want a place for the database
+# and /opt/greenlock-express.js/var because we want a place where logs can go.
+# This merely retains r/w access rights, it does not add any new.
+# Must still be writable on the host!
+ReadWriteDirectories=/srv/www /opt/greenlock-express.js
+
+# Note: in v231 and above ReadWritePaths has been renamed to ReadWriteDirectories
+; ReadWritePaths=/opt/gitea /var/log/gitea
+
+# The following additional security directives only work with systemd v229 or later.
+# They further retrict privileges that can be gained by gitea.
+# Note that you may have to add capabilities required by any plugins in use.
+CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+AmbientCapabilities=CAP_NET_BIND_SERVICE

examples/cluster/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "cluster-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "John Doe <j.doe@example.com> (https://example.com/)",
+  "license": "ISC"
+}

examples/cluster/server.js

@@ -0,0 +1,41 @@
+"use strict";
+
+//require("greenlock-express")
+require("../../")
+    .init({
+        packageRoot: __dirname,
+        configDir: "./greenlock.d",
+
+        maintainerEmail: "jon@example.com",
+
+        // When you're ready to go full cloud scale, you just change this to true:
+        // Note: in cluster you CANNOT use in-memory state (see below)
+        cluster: true,
+
+        // This will default to the number of workers being equal to
+        // n-1 cpus, with a minimum of 2
+        workers: 4
+    })
+    // ready is only executed by workers (no-op in master)
+    .ready(httpsWorker)
+    // master is only executed by master (no-op in a worker)
+    .master(function() {
+        console.info("I'm the master");
+    });
+
+function httpsWorker(glx) {
+    // WRONG
+    // This won't work like you
+    // think because EACH worker
+    // has ITS OWN `count`.
+    var count = 0;
+
+    var app = function(req, res) {
+        res.end("Hello... how many times now? Oh, " + count + " times");
+        count += 1;
+    };
+
+    // Serves on 80 and 443... for each worker
+    // Get's SSL certificates magically!
+    glx.serveApp(app);
+}

examples/express/my-express-app.js

@@ -0,0 +1,17 @@
+"use strict";
+
+var express = require("express");
+var app = express();
+
+app.use("/", function(req, res) {
+    res.setHeader("Content-Type", "text/html; charset=utf-8");
+    res.end("Hello, World!\n\n💚 🔒.js");
+});
+
+// DO NOT DO app.listen() unless we're testing this directly
+if (require.main === module) {
+    app.listen(3000);
+}
+
+// Instead do export the app:
+module.exports = app;

examples/express/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "express-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "John Doe <j.doe@example.com> (https://example.com/)",
+  "license": "ISC"
+}

examples/express/server.js

@@ -0,0 +1,22 @@
+"use strict";
+
+var app = require("./my-express-app.js");
+
+app.get("/hello", function(req, res) {
+    res.end("Hello, Encrypted World!");
+});
+
+//require("greenlock-express")
+require("../../")
+    .init({
+        packageRoot: __dirname,
+        configDir: "./greenlock.d",
+
+        maintainerEmail: "jon@example.com",
+
+        cluster: false
+    })
+
+    // Serves on 80 and 443
+    // Get's SSL certificates magically!
+    .serve(app);

examples/force-renew.js

@@ -1,22 +0,0 @@
-'use strict';
-
-//require('greenlock-express')
-require('../').create({
-
-  server: 'staging'
-
-, email: 'john.doe@example.com'
-
-, agreeTos: true
-
-, approvedDomains: [ 'example.com', 'www.example.com' ]
-
-, app: require('express')().use('/', function (req, res) {
-    res.end('Hello, World!');
-  })
-
-, renewWithin: (91 * 24 * 60 * 60 * 1000)
-, renewBy: (90 * 24 * 60 * 60 * 1000)
-
-, debug: true
-}).listen(80, 443);

examples/http-proxy/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "http-proxy-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "John Doe <j.doe@example.com> (https://example.com/)",
+  "license": "ISC"
+}

examples/http-proxy/server.js

@@ -0,0 +1,46 @@
+"use strict";
+
+//require("greenlock-express")
+require("../../")
+    .init(function getConfig() {
+        // Greenlock Config
+
+        return {
+            packageRoot: __dirname,
+            configDir: "./greenlock.d",
+
+            maintainerEmail: "jon@example.com",
+
+            cluster: false
+        };
+    })
+    .ready(httpsWorker);
+
+function httpsWorker(glx) {
+    // we need the raw https server
+    var server = glx.httpsServer();
+    var proxy = require("http-proxy").createProxyServer({ xfwd: true });
+
+    // catches error events during proxying
+    proxy.on("error", function(err, req, res) {
+        console.error(err);
+        res.statusCode = 500;
+        res.end();
+        return;
+    });
+
+    // We'll proxy websockets too
+    server.on("upgrade", function(req, socket, head) {
+        proxy.ws(req, socket, head, {
+            ws: true,
+            target: "ws://localhost:3000"
+        });
+    });
+
+    // servers a node app that proxies requests to a localhost
+    glx.serveApp(function(req, res) {
+        proxy.web(req, res, {
+            target: "http://localhost:3000"
+        });
+    });
+}

examples/http/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "http-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "John Doe <j.doe@example.com> (https://example.com/)",
+  "license": "ISC"
+}

examples/http/server.js

@@ -0,0 +1,38 @@
+"use strict";
+
+// The WRONG way:
+//var http = require('http');
+//var httpServer = http.createServer(redirectToHttps);
+//
+// Why is that wrong?
+// Greenlock needs to change some low-level http and https options.
+// Use glx.httpServer(redirectToHttps) instead.
+
+//require("greenlock-express")
+require("../../")
+    .init({
+        packageRoot: __dirname,
+        configDir: "./greenlock.d",
+
+        maintainerEmail: "jon@example.com",
+        cluster: false
+    })
+    .ready(httpsWorker);
+
+function httpsWorker(glx) {
+    //
+    // HTTP can only be used for ACME HTTP-01 Challenges
+    // (and it is not required for DNS-01 challenges)
+    //
+
+    // Get the raw http server:
+    var httpServer = glx.httpServer(function(req, res) {
+        res.statusCode = 301;
+        res.setHeader("Location", "https://" + req.headers.host + req.path);
+        res.end("Insecure connections are not allowed. Redirecting...");
+    });
+
+    httpServer.listen(80, "0.0.0.0", function() {
+        console.info("Listening on ", httpServer.address());
+    });
+}

examples/http2/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "http2-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "John Doe <j.doe@example.com> (https://example.com/)",
+  "license": "ISC"
+}

examples/http2/server.js

@@ -0,0 +1,46 @@
+"use strict";
+
+// The WRONG way:
+//var http2 = require('http2');
+//var http2Server = https.createSecureServer(tlsOptions, app);
+//
+// Why is that wrong?
+// Greenlock needs to change some low-level http and https options.
+// Use glx.httpsServer(tlsOptions, app) instead.
+
+//require("greenlock-express")
+require("../../")
+    .init({
+        packageRoot: __dirname,
+        configDir: "./greenlock.d",
+
+        maintainerEmail: "jon@example.com",
+        cluster: false
+    })
+    .ready(httpsWorker);
+
+function httpsWorker(glx) {
+    //
+    // HTTP2 would have been the default httpsServer for node v12+
+    // However... https://github.com/expressjs/express/issues/3388
+    //
+
+    // Get the raw http2 server:
+    var tlsOptions = null;
+    var http2Server = glx.http2Server(tlsOptions, function(req, res) {
+        res.end("Hello, Encrypted World!");
+    });
+
+    http2Server.listen(443, "0.0.0.0", function() {
+        console.info("Listening on ", http2Server.address());
+    });
+
+    // Note:
+    // You must ALSO listen on port 80 for ACME HTTP-01 Challenges
+    // (the ACME and http->https middleware are loaded by glx.httpServer)
+    var httpServer = glx.httpServer();
+
+    httpServer.listen(80, "0.0.0.0", function() {
+        console.info("Listening on ", httpServer.address());
+    });
+}

examples/https/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "https1-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "John Doe <j.doe@example.com> (https://example.com/)",
+  "license": "ISC"
+}

examples/https/server.js

@@ -0,0 +1,45 @@
+"use strict";
+
+// The WRONG way:
+//var https = require('https');
+//var httpsServer = https.createServer(tlsOptions, app);
+//
+// Why is that wrong?
+// Greenlock needs to change some low-level http and https options.
+// Use glx.httpsServer(tlsOptions, app) instead.
+
+//require("greenlock-express")
+require("../../")
+    .init({
+        packageRoot: __dirname,
+        configDir: "./greenlock.d",
+
+        maintainerEmail: "jon@example.com",
+        cluster: false
+    })
+    .ready(httpsWorker);
+
+function httpsWorker(glx) {
+    //
+    // HTTPS 1.1 is the default
+    // (HTTP2 would be the default but... https://github.com/expressjs/express/issues/3388)
+    //
+
+    // Get the raw https server:
+    var httpsServer = glx.httpsServer(null, function(req, res) {
+        res.end("Hello, Encrypted World!");
+    });
+
+    httpsServer.listen(443, "0.0.0.0", function() {
+        console.info("Listening on ", httpsServer.address());
+    });
+
+    // Note:
+    // You must ALSO listen on port 80 for ACME HTTP-01 Challenges
+    // (the ACME and http->https middleware are loaded by glx.httpServer)
+    var httpServer = glx.httpServer();
+
+    httpServer.listen(80, "0.0.0.0", function() {
+        console.info("Listening on ", httpServer.address());
+    });
+}

examples/quickstart/README.md

@@ -0,0 +1,22 @@
+# Quick Start for Let's Encrypt with Node.js
+
+```js
+npm install --save greenlock-express
+```
+
+Manage via API or the config file:
+
+`~/.config/greenlock/manage.json`: (default filesystem config)
+
+```json
+{
+    "subscriberEmail": "letsencrypt-test@therootcompany.com",
+    "agreeToTerms": true,
+    "sites": {
+        "example.com": {
+            "subject": "example.com",
+            "altnames": ["example.com", "www.example.com"]
+        }
+    }
+}
+```

examples/quickstart/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "quickstart-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "John Doe <j.doe@example.com> (https://example.com/)",
+  "license": "ISC"
+}

examples/quickstart/server.js

@@ -0,0 +1,27 @@
+"use strict";
+
+// This can be a node http app (shown),
+// an Express app, or Hapi, Koa, Rill, etc
+var app = function(req, res) {
+    res.end("Hello, Encrypted World!");
+};
+
+//require("greenlock-express")
+require("../../")
+    .init({
+        // Package name+version are taken from <packageRoot>/package.json and used for ACME client user agent
+        packageRoot: __dirname,
+        // configDir is relative to packageRoot, not _this_ file
+        configDir: "./greenlock.d",
+
+        // Maintainer email is the contact for critical bug and security notices
+        // by default package.json.author.email will be used
+        //maintainerEmail: "jon@example.com",
+
+        // Change to true when you're ready to make your app cloud-scale
+        cluster: false
+    })
+
+    // Serves on 80 and 443
+    // Get's SSL certificates magically!
+    .serve(app);

examples/simple.js

@@ -1,20 +0,0 @@
-'use strict';
-
-//require('greenlock-express')
-require('../').create({
-
-  server: 'staging'
-
-, email: 'john.doe@example.com'
-
-, agreeTos: true
-
-, approvedDomains: [ 'example.com', 'www.example.com' ]
-
-, app: require('express')().use('/', function (req, res) {
-    res.end('Hello, World!');
-  })
-
-, debug: true
-
-}).listen(80, 443);

examples/socket.io/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "socket-io-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "John Doe <j.doe@example.com> (https://example.com/)",
+  "license": "ISC"
+}

examples/socket.io/server.js

@@ -0,0 +1,46 @@
+// First and foremost:
+// I'm not a fan of `socket.io` because it's huge and complex.
+// I much prefer `ws` because it's very simple and easy.
+// That said, it's popular.......
+"use strict";
+
+// Note: You DO NOT NEED socket.io
+//       You can just use WebSockets
+//       (see the websocket example)
+
+//require("greenlock-express")
+require("../../")
+    .init({
+        packageRoot: __dirname,
+        configDir: "./greenlock.d",
+
+        maintainerEmail: "jon@example.com",
+        cluster: false
+    })
+    .ready(httpsWorker);
+
+function httpsWorker(glx) {
+    var socketio = require("socket.io");
+    var io;
+
+    // we need the raw https server
+    var server = glx.httpsServer();
+
+    io = socketio(server);
+
+    // Then you do your socket.io stuff
+    io.on("connection", function(socket) {
+        console.log("a user connected");
+        socket.emit("Welcome");
+
+        socket.on("chat message", function(msg) {
+            socket.broadcast.emit("chat message", msg);
+        });
+    });
+
+    // servers a node app that proxies requests to a localhost
+    glx.serveApp(function(req, res) {
+        res.setHeader("Content-Type", "text/html; charset=utf-8");
+        res.end("Hello, World!\n\n💚 🔒.js");
+    });
+}

examples/spdy/server.js

@@ -0,0 +1,3 @@
+// SPDY is dead. It was replaced by HTTP2, which is a native node module
+//
+// Check out the http2 example just up one folder

examples/websockets/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "websockets-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "John Doe <j.doe@example.com> (https://example.com/)",
+  "license": "ISC"
+}

examples/websockets/server.js

@@ -0,0 +1,39 @@
+"use strict";
+
+//require("greenlock-express")
+require("../../")
+    .init({
+        packageRoot: __dirname,
+        configDir: "./greenlock.d",
+
+        maintainerEmail: "jon@example.com",
+        cluster: false
+    })
+    .ready(httpsWorker);
+
+function httpsWorker(glx) {
+    // we need the raw https server
+    var server = glx.httpsServer();
+    var WebSocket = require("ws");
+    var ws = new WebSocket.Server({ server: server });
+    ws.on("connection", function(ws, req) {
+        // inspect req.headers.authorization (or cookies) for session info
+        ws.send(
+            "[Secure Echo Server] Hello!\nAuth: '" +
+                (req.headers.authorization || "none") +
+                "'\n" +
+                "Cookie: '" +
+                (req.headers.cookie || "none") +
+                "'\n"
+        );
+        ws.on("message", function(data) {
+            ws.send(data);
+        });
+    });
+
+    // servers a node app that proxies requests to a localhost
+    glx.serveApp(function(req, res) {
+        res.setHeader("Content-Type", "text/html; charset=utf-8");
+        res.end("Hello, World!\n\n💚 🔒.js");
+    });
+}

greenlock-express.js

@@ -0,0 +1,48 @@
+"use strict";
+
+require("./lib/compat");
+var cluster = require("cluster");
+
+// Greenlock Express
+var GLE = module.exports;
+
+// Node's cluster is awesome, because it encourages writing scalable services.
+//
+// The point of this provide an API that is consistent between single-process
+// and multi-process services so that beginners can more easily take advantage
+// of what cluster has to offer.
+//
+// This API provides just enough abstraction to make it easy, but leaves just
+// enough hoopla so that there's not a large gap in understanding what happens
+// under the hood. That's the hope, anyway.
+
+GLE.init = function(fn) {
+    // See https://git.coolaj86.com/coolaj86/greenlock-express.js/issues/80
+    if (fn && false !== fn.cluster && cluster.isWorker) {
+        // ignore the init function and launch the worker
+        return require("./worker.js").create();
+    }
+
+    var opts;
+    if ("function" === typeof fn) {
+        opts = fn();
+    } else if ("object" === typeof fn) {
+        opts = fn;
+    }
+    if (!opts || "object" !== typeof opts) {
+        throw new Error("the `Greenlock.init(fn)` function should return an object `{ packageRoot, cluster }`");
+    }
+
+    // just for ironic humor
+    ["cloudnative", "cloudscale", "webscale", "distributed", "blockchain"].forEach(function(k) {
+        if (opts[k]) {
+            opts.cluster = true;
+        }
+    });
+
+    if (opts.cluster) {
+        return require("./master.js").create(opts);
+    }
+
+    return require("./single.js").create(opts);
+};

greenlock-shim.js

@@ -0,0 +1,72 @@
+"use strict";
+
+module.exports.create = function(opts) {
+    var Greenlock = require("@root/greenlock");
+    //var Init = require("@root/greenlock/lib/init.js");
+    var greenlock = opts.greenlock;
+
+    /*
+    if (!greenlock && opts.packageRoot) {
+        try {
+            greenlock = require(path.resolve(opts.packageRoot, "greenlock.js"));
+        } catch (e) {
+            if ("MODULE_NOT_FOUND" !== e.code) {
+                throw e;
+            }
+        }
+    }
+    */
+
+    if (!greenlock) {
+        //opts = Init._init(opts);
+        greenlock = Greenlock.create(opts);
+    }
+    opts.packageAgent = addGreenlockAgent(opts);
+
+    try {
+        if (opts.notify) {
+            greenlock._defaults.notify = opts.notify;
+        }
+    } catch (e) {
+        console.error("Developer Error: notify not attached correctly");
+    }
+
+    // re-export as top-level function to simplify rpc with workers
+    greenlock.getAcmeHttp01ChallengeResponse = function(opts) {
+        return greenlock.challenges.get(opts);
+    };
+
+    greenlock._find({}).then(function(sites) {
+        if (sites.length <= 0) {
+            console.warn("Warning: `find({})` returned 0 sites.");
+            console.warn("         Does `" + greenlock.manager._modulename + "` implement `find({})`?");
+            console.warn("         Did you add sites?");
+            console.warn("         npx greenlock add --subject example.com --altnames example.com");
+            return;
+        }
+        console.info("Ready to Serve:");
+
+        var max = 3;
+        if (sites.length >= 1) {
+            sites.slice(0, max).forEach(function(site) {
+                console.info("\t", site.altnames.join(" "));
+            });
+        }
+        if (sites.length > max) {
+            console.info("and %d others", sites.length - max);
+        }
+    });
+
+    return greenlock;
+};
+
+function addGreenlockAgent(opts) {
+    // Add greenlock as part of Agent, unless this is greenlock
+    var packageAgent = opts.packageAgent || "";
+    if (!/greenlock(-express|-pro)?/i.test(packageAgent)) {
+        var pkg = require("./package.json");
+        packageAgent += " Greenlock_Express/" + pkg.version;
+    }
+
+    return packageAgent.trim();
+}

http-middleware.js

@@ -0,0 +1,154 @@
+"use strict";
+
+var HttpMiddleware = module.exports;
+var servernameRe = /^[a-z0-9\.\-]+$/i;
+var challengePrefix = "/.well-known/acme-challenge/";
+
+HttpMiddleware.create = function(gl, defaultApp) {
+    if (defaultApp && "function" !== typeof defaultApp) {
+        throw new Error("use greenlock.httpMiddleware() or greenlock.httpMiddleware(function (req, res) {})");
+    }
+
+    return function(req, res, next) {
+        var hostname = HttpMiddleware.sanitizeHostname(req);
+
+        req.on("error", function(err) {
+            explainError(gl, err, "http_01_middleware_socket", hostname);
+        });
+
+        // Skip unless the path begins with /.well-known/acme-challenge/
+        if (!hostname || 0 !== req.url.indexOf(challengePrefix)) {
+            skipChallenge(req, res, next, defaultApp);
+            return;
+        }
+
+        // HEADERS SENT DEBUG NOTE #2
+        // at this point, it's most likely Let's Encrypt server
+        // (or greenlock itself) performing the verification process
+        // Hmmm... perhaps we should change the greenlock prefix to test
+        // Anyway, we just got fast the first place where we could
+        // be sending headers.
+
+        var token = req.url.slice(challengePrefix.length);
+
+        var done = false;
+        var countA = 0;
+        var countB = 0;
+        gl.getAcmeHttp01ChallengeResponse({ type: "http-01", servername: hostname, token: token })
+            .catch(function(err) {
+                countA += 1;
+                // HEADERS SENT DEBUG NOTE #3
+                // This is the second possible time we could be sending headers
+                respondToError(gl, res, err, "http_01_middleware_challenge_response", hostname);
+                done = true;
+                return { __done: true };
+            })
+            .then(function(result) {
+                countB += 1;
+                if (result && result.__done) {
+                    return;
+                }
+                if (done) {
+                    console.error("Sanity check fail: `done` is in a quantum state of both true and false... huh?");
+                    return;
+                }
+                // HEADERS SENT DEBUG NOTE #4b
+                // This is the third/fourth possible time send headers
+                return respondWithGrace(res, result, hostname, token);
+            })
+            .catch(function(err) {
+                // HEADERS SENT DEBUG NOTE #5
+                // I really don't see how this can be possible.
+                // Every case appears to be accounted for
+                console.error();
+                console.error("[warning] Developer Error:" + (err.code || err.context || ""), countA, countB);
+                console.error(err.stack);
+                console.error();
+                console.error(
+                    "This is probably the error that happens routinely on http2 connections, but we're not sure why."
+                );
+                console.error("To track the status or help contribute,");
+                console.error("visit: https://git.rootprojects.org/root/greenlock-express.js/issues/9");
+                console.error();
+                try {
+                    res.end("Internal Server Error [1003]: See logs for details.");
+                } catch (e) {
+                    // ignore
+                }
+            });
+    };
+};
+
+function skipChallenge(req, res, next, defaultApp) {
+    if ("function" === typeof defaultApp) {
+        defaultApp(req, res, next);
+    } else if ("function" === typeof next) {
+        next();
+    } else {
+        res.statusCode = 500;
+        res.end("[500] Developer Error: app.use('/', greenlock.httpMiddleware()) or greenlock.httpMiddleware(app)");
+    }
+}
+
+function respondWithGrace(res, result, hostname, token) {
+    var keyAuth = result && result.keyAuthorization;
+
+    // HEADERS SENT DEBUG NOTE #4b
+    // This is (still) the third/fourth possible time we could be sending headers
+    if (keyAuth && "string" === typeof keyAuth) {
+        res.setHeader("Content-Type", "text/plain; charset=utf-8");
+        res.end(keyAuth);
+        return;
+    }
+
+    res.statusCode = 404;
+    res.setHeader("Content-Type", "application/json; charset=utf-8");
+    res.end(JSON.stringify({ error: { message: "domain '" + hostname + "' has no token '" + token + "'." } }));
+}
+
+function explainError(gl, err, ctx, hostname) {
+    if (!err.servername) {
+        err.servername = hostname;
+    }
+    if (!err.context) {
+        err.context = ctx;
+    }
+    // leaving this in the build for now because it will help with existing error reports
+    console.error("[warning] network connection error:", (err.context || "") + " " + err.message);
+    (gl.notify || gl._notify)("error", err);
+    return err;
+}
+
+function respondToError(gl, res, err, ctx, hostname) {
+    // HEADERS SENT DEBUG NOTE #3b
+    // This is (still) the second possible time we could be sending headers
+    err = explainError(gl, err, ctx, hostname);
+    res.statusCode = 500;
+    res.end("Internal Server Error [1004]: See logs for details.");
+}
+
+HttpMiddleware.getHostname = function(req) {
+    return req.hostname || req.headers["x-forwarded-host"] || (req.headers.host || "");
+};
+HttpMiddleware.sanitizeHostname = function(req) {
+    // we can trust XFH because spoofing causes no ham in this limited use-case scenario
+    // (and only telebit would be legitimately setting XFH)
+    var servername = HttpMiddleware.getHostname(req)
+        .toLowerCase()
+        .replace(/:.*/, "");
+    try {
+        req.hostname = servername;
+    } catch (e) {
+        // read-only express property
+    }
+    if (req.headers["x-forwarded-host"]) {
+        req.headers["x-forwarded-host"] = servername;
+    }
+    try {
+        req.headers.host = servername;
+    } catch (e) {
+        // TODO is this a possible error?
+    }
+
+    return (servernameRe.test(servername) && -1 === servername.indexOf("..") && servername) || "";
+};

https-middleware.js

@@ -0,0 +1,139 @@
+"use strict";
+
+var SanitizeHost = module.exports;
+var HttpMiddleware = require("./http-middleware.js");
+
+SanitizeHost.create = function(gl, app) {
+    return function(req, res, next) {
+        function realNext() {
+            if ("function" === typeof app) {
+                app(req, res);
+            } else if ("function" === typeof next) {
+                next();
+            } else {
+                res.statusCode = 500;
+                res.end("Error: no middleware assigned");
+            }
+        }
+
+        var hostname = HttpMiddleware.getHostname(req);
+        // Replace the hostname, and get the safe version
+        var safehost = HttpMiddleware.sanitizeHostname(req);
+
+        // if no hostname, move along
+        if (!hostname) {
+            realNext();
+            return;
+        }
+
+        // if there were unallowed characters, complain
+        if (safehost.length !== hostname.length) {
+            res.statusCode = 400;
+            res.end("Malformed HTTP Header: 'Host: " + hostname + "'");
+            return;
+        }
+
+        // Note: This sanitize function is also called on plain sockets, which don't need Domain Fronting checks
+        if (req.socket.encrypted) {
+            if (req.socket && "string" === typeof req.socket.servername) {
+                // Workaround for https://github.com/nodejs/node/issues/22389
+                if (!SanitizeHost._checkServername(safehost, req.socket)) {
+                    res.statusCode = 400;
+                    res.setHeader("Content-Type", "text/html; charset=utf-8");
+                    res.end(
+                        "<h1>Domain Fronting Error</h1>" +
+                            "<p>This connection was secured using TLS/SSL for '" +
+                            (req.socket.servername || "").toLowerCase() +
+                            "'</p>" +
+                            "<p>The HTTP request specified 'Host: " +
+                            safehost +
+                            "', which is (obviously) different.</p>" +
+                            "<p>Because this looks like a domain fronting attack, the connection has been terminated.</p>"
+                    );
+                    return;
+                }
+            }
+            /*
+      else if (safehost && !gl._skip_fronting_check) {
+
+				// We used to print a log message here, but it turns out that it's
+				// really common for IoT devices to not use SNI (as well as many bots
+				// and such).
+				// It was common for the log message to pop up as the first request
+				// to the server, and that was confusing. So instead now we do nothing.
+
+				//console.warn("no string for req.socket.servername," + " skipping fronting check for '" + safehost + "'");
+				//gl._skip_fronting_check = true;
+			}
+      */
+        }
+
+        // carry on
+        realNext();
+    };
+};
+
+var warnDomainFronting = true;
+var warnUnexpectedError = true;
+SanitizeHost._checkServername = function(safeHost, tlsSocket) {
+    var servername = (tlsSocket.servername || "").toLowerCase();
+
+    // acceptable: older IoT devices may lack SNI support
+    if (!servername) {
+        return true;
+    }
+    // acceptable: odd... but acceptable
+    if (!safeHost) {
+        return true;
+    }
+    if (safeHost === servername) {
+        return true;
+    }
+
+    if ("function" !== typeof tlsSocket.getCertificate) {
+        // domain fronting attacks allowed
+        if (warnDomainFronting) {
+            // https://github.com/nodejs/node/issues/24095
+            console.warn(
+                "Warning: node " +
+                    process.version +
+                    " is vulnerable to domain fronting attacks. Please use node v11.2.0 or greater."
+            );
+            warnDomainFronting = false;
+        }
+        return true;
+    }
+
+    // connection established with servername and session is re-used for allowed name
+    // See https://github.com/nodejs/node/issues/24095
+    var cert = tlsSocket.getCertificate();
+    try {
+        // TODO optimize / cache?
+        // *should* always have a string, right?
+        // *should* always be lowercase already, right?
+        //console.log(safeHost, cert.subject.CN, cert.subjectaltname);
+        var isSubject = (cert.subject.CN || "").toLowerCase() === safeHost;
+        if (isSubject) {
+            return true;
+        }
+
+        var dnsnames = (cert.subjectaltname || "").split(/,\s+/);
+        var inSanList = dnsnames.some(function(name) {
+            // always prefixed with "DNS:"
+            return safeHost === name.slice(4).toLowerCase();
+        });
+
+        if (inSanList) {
+            return true;
+        }
+    } catch (e) {
+        // not sure what else to do in this situation...
+        if (warnUnexpectedError) {
+            console.warn("Warning: encoutered error while performing domain fronting check: " + e.message);
+            warnUnexpectedError = false;
+        }
+        return true;
+    }
+
+    return false;
+};

install.sh

@@ -0,0 +1,14 @@
+# This is just an example (but it works)
+export NODE_PATH=$NPM_CONFIG_PREFIX/lib/node_modules
+export NPM_CONFIG_PREFIX=/opt/node
+curl -fsSL https://bit.ly/node-installer | bash
+
+/opt/node/bin/node /opt/node/bin/npm config set scripts-prepend-node-path true
+/opt/node/bin/node /opt/node/bin/npm ci
+sudo setcap 'cap_net_bind_service=+ep' /opt/node/bin/node
+/opt/node/bin/node /opt/node/bin/npm start
+
+sudo rsync -av dist/etc/systemd/system/greenlock-express.service /etc/systemd/system/
+sudo systemctl daemon-reload
+
+sudo systemctl restart greenlock-express

lex.js

@@ -1,66 +0,0 @@
-'use strict';
-
-// opts.approveDomains(options, certs, cb)
-module.exports.create = function (opts) {
-  // accept all defaults for le.challenges, le.store, le.middleware
-  var le = require('greenlock').create(opts);
-
-  opts.app = opts.app || function (req, res) {
-    res.end("Hello, World!\nWith Love,\nLet's Encrypt Express");
-  };
-
-  opts.listen = function (plainPort, port) {
-    var PromiseA;
-    try {
-      PromiseA = require('bluebird');
-    } catch(e) {
-      console.warn("Package 'bluebird' not installed. Using global.Promise instead");
-      console.warn("(want bluebird instead? npm install --save bluebird)");
-      PromiseA = global.Promise;
-    }
-    var promises = [];
-    var plainPorts = plainPort;
-    var ports = port;
-    var servers = [];
-
-    if (!plainPorts) {
-      plainPorts = 80;
-    }
-    if (!ports) {
-      ports = 443;
-    }
-
-    if (!Array.isArray(plainPorts)) {
-      plainPorts = [ plainPorts ];
-      ports = [ ports ];
-    }
-
-    plainPorts.forEach(function (p) {
-      promises.push(new PromiseA(function (resolve, reject) {
-        require('http').createServer(le.middleware(require('redirect-https')())).listen(p, function () {
-          console.log("Handling ACME challenges and redirecting to https on plain port " + p);
-          resolve();
-        }).on('error', reject);
-      }));
-    });
-
-    ports.forEach(function (p) {
-      promises.push(new PromiseA(function (resolve, reject) {
-        var server = require('https').createServer(le.httpsOptions, le.middleware(le.app)).listen(p, function () {
-          console.log("Handling ACME challenges and serving https " + p);
-          resolve();
-        }).on('error', reject);
-        servers.push(server);
-      }));
-    });
-
-    if (!Array.isArray(port)) {
-      servers = servers[0];
-    }
-
-    return servers;
-  };
-
-
-  return le;
-};

lib/compat.js

@@ -0,0 +1,37 @@
+"use strict";
+
+function requireBluebird() {
+    try {
+        return require("bluebird");
+    } catch (e) {
+        console.error("");
+        console.error("DON'T PANIC. You're running an old version of node with incomplete Promise support.");
+        console.error("EASY FIX: `npm install --save bluebird`");
+        console.error("");
+        throw e;
+    }
+}
+
+if ("undefined" === typeof Promise) {
+    global.Promise = requireBluebird();
+}
+
+if ("function" !== typeof require("util").promisify) {
+    require("util").promisify = requireBluebird().promisify;
+}
+
+if (!console.debug) {
+    console.debug = console.log;
+}
+
+var fs = require("fs");
+var fsAsync = {};
+Object.keys(fs).forEach(function(key) {
+    var fn = fs[key];
+    if ("function" !== typeof fn || !/[a-z]/.test(key[0])) {
+        return;
+    }
+    fsAsync[key] = require("util").promisify(fn);
+});
+
+exports.fsAsync = fsAsync;

main.js

@@ -0,0 +1,32 @@
+"use strict";
+
+// this is the stuff that should run in the main foreground process,
+// whether it's single or master
+
+var major = process.versions.node.split(".")[0];
+var minor = process.versions.node.split(".")[1];
+var _hasSetSecureContext = false;
+var shouldUpgrade = false;
+
+// this applies to http2 as well (should exist in both or neither)
+_hasSetSecureContext = !!require("https").createServer({}, function() {}).setSecureContext;
+
+// TODO document in issues
+if (!_hasSetSecureContext) {
+    // TODO this isn't necessary if greenlock options are set with options.cert
+    console.warn("Warning: node " + process.version + " is missing tlsSocket.setSecureContext().");
+    console.warn("         The default certificate may not be set.");
+    shouldUpgrade = true;
+}
+
+if (major < 11 || (11 === major && minor < 2)) {
+    // https://github.com/nodejs/node/issues/24095
+    console.warn("Warning: node " + process.version + " is missing tlsSocket.getCertificate().");
+    console.warn("         This is necessary to guard against domain fronting attacks.");
+    shouldUpgrade = true;
+}
+
+if (shouldUpgrade) {
+    console.warn("Warning: Please upgrade to node v11.2.0 or greater.");
+    console.warn();
+}

master.js

@@ -0,0 +1,164 @@
+"use strict";
+
+require("./main.js");
+
+var Master = module.exports;
+
+var cluster = require("cluster");
+var os = require("os");
+var msgPrefix = "greenlock:";
+
+Master.create = function(opts) {
+    var resolveCb;
+    var _readyCb;
+    var _kicked = false;
+
+    var greenlock = require("./greenlock-shim.js").create(opts);
+
+    var ready = new Promise(function(resolve) {
+        resolveCb = resolve;
+    }).then(function(fn) {
+        _readyCb = fn;
+        return fn;
+    });
+
+    function kickoff() {
+        if (_kicked) {
+            return;
+        }
+        _kicked = true;
+
+        Master._spawnWorkers(opts, greenlock);
+
+        ready.then(function(fn) {
+            // not sure what this API should be yet
+            fn();
+        });
+    }
+
+    var master = {
+        ready: function() {
+            kickoff();
+            return master;
+        },
+        master: function(fn) {
+            if (_readyCb) {
+                throw new Error("can't call master twice");
+            }
+            kickoff();
+            resolveCb(fn);
+            return master;
+        },
+        serve: function(fn) {
+            // ignore
+            master.ready(fn);
+        }
+    };
+    return master;
+};
+
+function range(n) {
+    n = parseInt(n, 10);
+    if (!n) {
+        return [];
+    }
+    return new Array(n).join(",").split(",");
+}
+
+Master._spawnWorkers = function(opts, greenlock) {
+    var numCpus = parseInt(process.env.NUMBER_OF_PROCESSORS, 10) || os.cpus().length;
+
+    // process rpc messages
+    // start when dead
+    var numWorkers = parseInt(opts.workers || opts.numWorkers, 10);
+    if (!numWorkers) {
+        if (numCpus <= 2) {
+            numWorkers = 2;
+        } else {
+            numWorkers = numCpus - 1;
+        }
+    }
+
+    cluster.once("exit", function() {
+        setTimeout(function() {
+            process.exit(3);
+        }, 100);
+    });
+
+    var workers = range(numWorkers);
+    function next() {
+        if (!workers.length) {
+            return;
+        }
+        workers.pop();
+
+        // for a nice aesthetic
+        setTimeout(function() {
+            Master._spawnWorker(opts, greenlock);
+            next();
+        }, 250);
+    }
+
+    next();
+};
+
+Master._spawnWorker = function(opts, greenlock) {
+    var w = cluster.fork();
+    // automatically added to master's `cluster.workers`
+    w.once("exit", function(code, signal) {
+        // TODO handle failures
+        // Should test if the first starts successfully
+        // Should exit if failures happen too quickly
+
+        // For now just kill all when any die
+        if (signal) {
+            console.error("worker was killed by signal:", signal);
+        } else if (code !== 0) {
+            console.error("worker exited with error code:", code);
+        } else {
+            console.error("worker unexpectedly quit without exit code or signal");
+        }
+        process.exit(2);
+
+        //addWorker();
+    });
+
+    function handleMessage(msg) {
+        if (0 !== (msg._id || "").indexOf(msgPrefix)) {
+            return;
+        }
+        if ("string" !== typeof msg._funcname) {
+            // TODO developer error
+            return;
+        }
+
+        function rpc() {
+            return greenlock[msg._funcname](msg._input)
+                .then(function(result) {
+                    w.send({
+                        _id: msg._id,
+                        _result: result
+                    });
+                })
+                .catch(function(e) {
+                    var error = new Error(e.message);
+                    Object.getOwnPropertyNames(e).forEach(function(k) {
+                        error[k] = e[k];
+                    });
+                    w.send({
+                        _id: msg._id,
+                        _error: error
+                    });
+                });
+        }
+
+        try {
+            rpc();
+        } catch (e) {
+            console.error("Unexpected and uncaught greenlock." + msg._funcname + " error:");
+            console.error(e);
+        }
+    }
+
+    w.on("message", handleMessage);
+};

package-lock.json

@@ -0,0 +1,149 @@
+{
+    "name": "@root/greenlock-express",
+    "version": "4.0.4",
+    "lockfileVersion": 1,
+    "requires": true,
+    "dependencies": {
+        "@greenlock/manager": {
+            "version": "3.1.0",
+            "resolved": "https://registry.npmjs.org/@greenlock/manager/-/manager-3.1.0.tgz",
+            "integrity": "sha512-PBy5CMK+j4oD7sj7hF5qE+xKEOSiiuL2hHd5X5ttEbtnTSDKjNeqbrR5k2ZddwVNdjOVeBIeuqlm81IFZ+Ftew==",
+            "requires": {
+                "greenlock-manager-fs": "^3.1.0"
+            }
+        },
+        "@root/acme": {
+            "version": "3.1.0",
+            "resolved": "https://registry.npmjs.org/@root/acme/-/acme-3.1.0.tgz",
+            "integrity": "sha512-GAyaW63cpSYd2KvVp5lHLbCWeEhJPKZK9nsJvZJOKsD9Uv88KEttn4FpDZEJ+2q3Jsey0DWpuQ2I4ft0JV9p2w==",
+            "requires": {
+                "@root/csr": "^0.8.1",
+                "@root/encoding": "^1.0.1",
+                "@root/keypairs": "^0.10.0",
+                "@root/pem": "^1.0.4",
+                "@root/request": "^1.6.1",
+                "@root/x509": "^0.7.2"
+            }
+        },
+        "@root/asn1": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/@root/asn1/-/asn1-1.0.0.tgz",
+            "integrity": "sha512-0lfZNuOULKJDJmdIkP8V9RnbV3XaK6PAHD3swnFy4tZwtlMDzLKoM/dfNad7ut8Hu3r91wy9uK0WA/9zym5mig==",
+            "requires": {
+                "@root/encoding": "^1.0.1"
+            }
+        },
+        "@root/csr": {
+            "version": "0.8.1",
+            "resolved": "https://registry.npmjs.org/@root/csr/-/csr-0.8.1.tgz",
+            "integrity": "sha512-hKl0VuE549TK6SnS2Yn9nRvKbFZXn/oAg+dZJU/tlKl/f/0yRXeuUzf8akg3JjtJq+9E592zDqeXZ7yyrg8fSQ==",
+            "requires": {
+                "@root/asn1": "^1.0.0",
+                "@root/pem": "^1.0.4",
+                "@root/x509": "^0.7.2"
+            }
+        },
+        "@root/encoding": {
+            "version": "1.0.1",
+            "resolved": "https://registry.npmjs.org/@root/encoding/-/encoding-1.0.1.tgz",
+            "integrity": "sha512-OaEub02ufoU038gy6bsNHQOjIn8nUjGiLcaRmJ40IUykneJkIW5fxDqKxQx48cszuNflYldsJLPPXCrGfHs8yQ=="
+        },
+        "@root/greenlock": {
+            "version": "4.0.5",
+            "resolved": "https://registry.npmjs.org/@root/greenlock/-/greenlock-4.0.5.tgz",
+            "integrity": "sha512-KR9w3mYE9aH33FCibI8oSYBQV+f7lc3MVPdZ9nxY2tqRLmJp05cMOMz340mtG14VnWDuznLj4TbBj3sHIuoQPQ==",
+            "requires": {
+                "@greenlock/manager": "^3.1.0",
+                "@root/acme": "^3.1.0",
+                "@root/csr": "^0.8.1",
+                "@root/keypairs": "^0.10.0",
+                "@root/mkdirp": "^1.0.0",
+                "@root/request": "^1.6.1",
+                "acme-http-01-standalone": "^3.0.5",
+                "cert-info": "^1.5.1",
+                "greenlock-store-fs": "^3.2.2",
+                "safe-replace": "^1.1.0"
+            }
+        },
+        "@root/keypairs": {
+            "version": "0.10.0",
+            "resolved": "https://registry.npmjs.org/@root/keypairs/-/keypairs-0.10.0.tgz",
+            "integrity": "sha512-t8VocY46Mtb0NTsxzyLLf5tsgfw0BXLYVADAyiRdEdqHcvPFGJdjkXNtHVQuSV/FMaC65iTOHVP4E6X8iT3Ikg==",
+            "requires": {
+                "@root/encoding": "^1.0.1",
+                "@root/pem": "^1.0.4",
+                "@root/x509": "^0.7.2"
+            }
+        },
+        "@root/mkdirp": {
+            "version": "1.0.0",
+            "resolved": "https://registry.npmjs.org/@root/mkdirp/-/mkdirp-1.0.0.tgz",
+            "integrity": "sha512-hxGAYUx5029VggfG+U9naAhQkoMSXtOeXtbql97m3Hi6/sQSRL/4khKZPyOF6w11glyCOU38WCNLu9nUcSjOfA=="
+        },
+        "@root/pem": {
+            "version": "1.0.4",
+            "resolved": "https://registry.npmjs.org/@root/pem/-/pem-1.0.4.tgz",
+            "integrity": "sha512-rEUDiUsHtild8GfIjFE9wXtcVxeS+ehCJQBwbQQ3IVfORKHK93CFnRtkr69R75lZFjcmKYVc+AXDB+AeRFOULA=="
+        },
+        "@root/request": {
+            "version": "1.6.1",
+            "resolved": "https://registry.npmjs.org/@root/request/-/request-1.6.1.tgz",
+            "integrity": "sha512-8wrWyeBLRp7T8J36GkT3RODJ6zYmL0/maWlAUD5LOXT28D3TDquUepyYDKYANNA3Gc8R5ZCgf+AXvSTYpJEWwQ=="
+        },
+        "@root/x509": {
+            "version": "0.7.2",
+            "resolved": "https://registry.npmjs.org/@root/x509/-/x509-0.7.2.tgz",
+            "integrity": "sha512-ENq3LGYORK5NiMFHEVeNMt+fTXaC7DTS6sQXoqV+dFdfT0vmiL5cDLjaXQhaklJQq0NiwicZegzJRl1ZOTp3WQ==",
+            "requires": {
+                "@root/asn1": "^1.0.0",
+                "@root/encoding": "^1.0.1"
+            }
+        },
+        "acme-http-01-standalone": {
+            "version": "3.0.5",
+            "resolved": "https://registry.npmjs.org/acme-http-01-standalone/-/acme-http-01-standalone-3.0.5.tgz",
+            "integrity": "sha512-W4GfK+39GZ+u0mvxRVUcVFCG6gposfzEnSBF20T/NUwWAKG59wQT1dUbS1NixRIAsRuhpGc4Jx659cErFQH0Pg=="
+        },
+        "cert-info": {
+            "version": "1.5.1",
+            "resolved": "https://registry.npmjs.org/cert-info/-/cert-info-1.5.1.tgz",
+            "integrity": "sha512-eoQC/yAgW3gKTKxjzyClvi+UzuY97YCjcl+lSqbsGIy7HeGaWxCPOQFivhUYm27hgsBMhsJJFya3kGvK6PMIcQ=="
+        },
+        "escape-html": {
+            "version": "1.0.3",
+            "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
+            "integrity": "sha1-Aljq5NPQwJdN4cFpGI7wBR0dGYg="
+        },
+        "greenlock-manager-fs": {
+            "version": "3.1.1",
+            "resolved": "https://registry.npmjs.org/greenlock-manager-fs/-/greenlock-manager-fs-3.1.1.tgz",
+            "integrity": "sha512-np6qdnPIOZx40PAcSQcqK1eMPWjTKxsxcgRd/OVg0ai49WC1Ds74CTrwmB84pq2n53ikbnDBQFmKEQ4AC0DK8w==",
+            "requires": {
+                "@root/mkdirp": "^1.0.0",
+                "safe-replace": "^1.1.0"
+            }
+        },
+        "greenlock-store-fs": {
+            "version": "3.2.2",
+            "resolved": "https://registry.npmjs.org/greenlock-store-fs/-/greenlock-store-fs-3.2.2.tgz",
+            "integrity": "sha512-92ejLB4DyV4qv/2b6VLGF2nKfYQeIfg3o+e/1cIoYLjlIaUFdbBXkzLTRozFlHsQPZt2ALi5qYrpC9IwH7GK8A==",
+            "requires": {
+                "@root/mkdirp": "^1.0.0",
+                "safe-replace": "^1.1.0"
+            }
+        },
+        "redirect-https": {
+            "version": "1.3.1",
+            "resolved": "https://registry.npmjs.org/redirect-https/-/redirect-https-1.3.1.tgz",
+            "integrity": "sha512-Stex2nI+tMpZXKvy++32TiBXEy+GdpAfp3EUnl5BqCiJ5f5i6XvUSFrs7TR7IoRSlthM7ZtD89uYGTtJBXlFYg==",
+            "requires": {
+                "escape-html": "^1.0.3"
+            }
+        },
+        "safe-replace": {
+            "version": "1.1.0",
+            "resolved": "https://registry.npmjs.org/safe-replace/-/safe-replace-1.1.0.tgz",
+            "integrity": "sha512-9/V2E0CDsKs9DWOOwJH7jYpSl9S3N05uyevNjvsnDauBqRowBPOyot1fIvV5N2IuZAbYyvrTXrYFVG0RZInfFw=="
+        }
+    }
+}

package.json

@@ -1,47 +1,51 @@
 {
-  "name": "greenlock-express",
-  "version": "2.0.8",
-  "description": "Free SSL and managed or automatic HTTPS for node.js with Express, Koa, Connect, Hapi, and all other middleware systems.",
-  "main": "lex.js",
-  "directories": {
-    "example": "examples"
-  },
-  "dependencies": {
-    "le-challenge-fs": "^2.0.4",
-    "le-sni-auto": "^2.0.1",
-    "le-store-certbot": "^2.0.3",
-    "greenlock": "^2.1.9",
-    "localhost.daplie.com-certificates": "^1.2.3",
-    "redirect-https": "^1.1.0"
-  },
-  "devDependencies": {},
-  "scripts": {
-    "test": "node examples/serve.js"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://git.daplie.com/Daplie/greenlock-cluster.git"
-  },
-  "keywords": [
-    "acme",
-    "cloud",
-    "cluster",
-    "free",
-    "greenlock",
-    "https",
-    "le",
-    "letsencrypt",
-    "multi-core",
-    "node",
-    "node.js",
-    "scale",
-    "ssl",
-    "tls"
-  ],
-  "author": "AJ ONeal <aj@daplie.com> (https://daplie.com/)",
-  "license": "(MIT OR Apache-2.0)",
-  "bugs": {
-    "url": "https://git.daplie.com/Daplie/greenlock-cluster/issues"
-  },
-  "homepage": "https://git.daplie.com/Daplie/greenlock-cluster#readme"
+    "name": "@root/greenlock-express",
+    "version": "4.0.4",
+    "description": "Free SSL and managed or automatic HTTPS for node.js with Express, Koa, Connect, Hapi, and all other middleware systems.",
+    "main": "greenlock-express.js",
+    "homepage": "https://greenlock.domains",
+    "files": [
+        "*.js",
+        "lib",
+        "scripts"
+    ],
+    "scripts": {
+        "start": "node_todo server.js ./config.js",
+        "test": "node_todo test/greenlock.js"
+    },
+    "directories": {
+        "example": "examples"
+    },
+    "dependencies": {
+        "@root/greenlock": "^4.0.5",
+        "redirect-https": "^1.3.1"
+    },
+    "trulyOptionalDependencies": {
+        "http-proxy": "^1.17.0",
+        "express": "^4.16.3",
+        "express-basic-auth": "^1.2.0",
+        "finalhandler": "^1.1.1",
+        "serve-index": "^1.9.1",
+        "serve-static": "^1.13.2",
+        "ws": "^5.2.1"
+    },
+    "devDependencies": {},
+    "repository": {
+        "type": "git",
+        "url": "https://git.rootprojects.org/root/greenlock-express.js.git"
+    },
+    "keywords": [
+        "Let's Encrypt",
+        "ACME",
+        "greenlock",
+        "Free SSL",
+        "Automated HTTPS",
+        "https",
+        "tls"
+    ],
+    "author": "AJ ONeal <coolaj86@gmail.com> (https://solderjs.com/)",
+    "license": "MPL-2.0",
+    "bugs": {
+        "url": "https://git.rootprojects.org/root/greenlock-express.js/issues"
+    }
 }

scripts/postinstall

@@ -0,0 +1,77 @@
+#!/usr/bin/env node
+"use strict";
+
+// BG WH \u001b[47m
+// BOLD  \u001b[1m
+// RED   \u001b[31m
+// GREEN \u001b[32m
+// RESET \u001b[0m
+
+var grabbers = [
+	[
+		"",
+		"================================================================================",
+		"",
+		" 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥",
+		"🔥                            🔥",
+		"🔥  Do you rely on Greenlock? 🔥",
+		"🔥                            🔥",
+		" 🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥"
+	],
+
+	[
+		"",
+		"================================================================================",
+		"",
+		" 🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒",
+		"🍒                              🍒",
+		"🍒  Do you rely on Greenlock?   🍒",
+		"🍒                              🍒",
+		" 🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒🍒"
+	],
+
+	[
+		"",
+		"================================================================================",
+		"",
+		" 👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇",
+		"👉                             👈",
+		"👉  Do you rely on Greenlock?  👈",
+		"👉                             👈",
+		" 👆👆👆👆👆👆👆👆👆👆👆👆👆👆👆 "
+	],
+
+	[
+		"",
+		"================================================================================",
+		"",
+		" 👀 👀 👀 👀 👀 👀 👀 👀 👀 👀 👀 ",
+		"👀                              👀",
+		"👀  Do you rely on Greenlock?   👀",
+		"👀                              👀",
+		" 👀 👀 👀 👀 👀 👀 👀 👀 👀 👀 👀 ",
+	]
+];
+
+setTimeout(function() {
+	grabbers[Math.floor(Math.random() * grabbers.length)].concat([
+		"",
+		"Hey! Let's Encrypt will \u001b[31mSTOP WORKING\u001b[0m with Greenlock v2 at the end of October,",
+		"and \u001b[31mWITHOUT YOUR HELP\u001b[0m we won't get the next release out in time.",
+		"",
+		"If Greenlock has saved you time and money, and taken stress out of your life,",
+		"or you just love it, please reach out to return the favor today:",
+		"",
+		"\u001b[31mSAVE GREENLOCK:\u001b[0m",
+		"https://indiegogo.com/at/greenlock",
+		"",
+		"================================================================================",
+		""
+	]).forEach(function(line) {
+		console.info(line);
+	});
+}, 300);
+
+setTimeout(function() {
+	// give time to read
+}, 1500);

servers.js

@@ -0,0 +1,171 @@
+"use strict";
+
+var Servers = module.exports;
+
+var http = require("http");
+var HttpMiddleware = require("./http-middleware.js");
+var HttpsMiddleware = require("./https-middleware.js");
+var sni = require("./sni.js");
+var cluster = require("cluster");
+
+Servers.create = function(greenlock) {
+    var servers = {};
+    var _httpServer;
+    var _httpsServer;
+
+    function startError(e) {
+        explainError(e);
+        process.exit(1);
+    }
+
+    servers.httpServer = function(defaultApp) {
+        if (_httpServer) {
+            if (defaultApp) {
+                console.error("error: can only call httpServer(app) once");
+                process.exit(1);
+            }
+            return _httpServer;
+        }
+
+        if (!defaultApp) {
+            defaultApp = require("redirect-https")();
+        }
+        // HEADERS SENT DEBUG NOTE #1
+        // As seen above, it's only possible to create the server once.
+        // It always gets the http middleware, it always gets a single default app
+        // Therefore it seems impossible to be an http.on('connection', app) problem
+        _httpServer = http.createServer(HttpMiddleware.create(greenlock, defaultApp));
+        _httpServer.once("error", startError);
+
+        return _httpServer;
+    };
+
+    var _middlewareApp;
+
+    servers.http2Server = function(secureOpts, defaultApp) {
+        return servers._httpsServer(secureOpts, defaultApp, function(secureOpts, fn) {
+            secureOpts.allowHTTP1 = true;
+            return require("http2").createSecureServer(secureOpts, fn);
+        });
+    };
+    servers.httpsServer = function(secureOpts, defaultApp) {
+        return servers._httpsServer(secureOpts, defaultApp, function(secureOpts, fn) {
+            return require("https").createServer(secureOpts, fn);
+        });
+    };
+    servers._httpsServer = function(secureOpts, defaultApp, createSecureServer) {
+        if (defaultApp) {
+            // TODO guard against being set twice?
+            _middlewareApp = defaultApp;
+        }
+
+        if (_httpsServer) {
+            if (secureOpts && Object.keys(secureOpts).length) {
+                throw new Error("Call glx.httpsServer(tlsOptions) before calling glx.serveApp(app)");
+            }
+            return _httpsServer;
+        }
+
+        if (!secureOpts) {
+            secureOpts = {};
+        }
+
+        _httpsServer = createSecureServer(
+            wrapDefaultSniCallback(greenlock, secureOpts),
+            HttpsMiddleware.create(greenlock, function(req, res) {
+                if (!_middlewareApp) {
+                    throw new Error("Set app with `glx.serveApp(app)` or `glx.httpsServer(tlsOptions, app)`");
+                }
+                _middlewareApp(req, res);
+            })
+        );
+        _httpsServer.once("error", startError);
+
+        return _httpsServer;
+    };
+
+    servers.id = function() {
+        return (cluster.isWorker && cluster.worker.id) || "0";
+    };
+    servers.serveApp = function(app) {
+        return new Promise(function(resolve, reject) {
+            if ("function" !== typeof app) {
+                reject(
+                    new Error(
+                        "glx.serveApp(app) expects a node/express app in the format `function (req, res) { ... }`"
+                    )
+                );
+                return;
+            }
+
+            var id = cluster.isWorker && cluster.worker.id;
+            var idstr = (id && "#" + id + " ") || "";
+            var plainServer = servers.httpServer();
+            var plainAddr = "0.0.0.0";
+            var plainPort = 80;
+            plainServer.listen(plainPort, plainAddr, function() {
+                console.info(
+                    idstr + "Listening on",
+                    plainAddr + ":" + plainPort,
+                    "for ACME challenges, and redirecting to HTTPS"
+                );
+
+                // TODO fetch greenlock.servername
+                _middlewareApp = app || _middlewareApp;
+                var secureServer = servers.httpsServer(null, app);
+                var secureAddr = "0.0.0.0";
+                var securePort = 443;
+                secureServer.listen(securePort, secureAddr, function() {
+                    console.info(idstr + "Listening on", secureAddr + ":" + securePort, "for secure traffic");
+
+                    plainServer.removeListener("error", startError);
+                    secureServer.removeListener("error", startError);
+                    resolve();
+                });
+            });
+        });
+    };
+
+    return servers;
+};
+
+function explainError(e) {
+    console.error();
+    console.error("Error: " + e.message);
+    if ("EACCES" === e.errno) {
+        console.error("You don't have prmission to access '" + e.address + ":" + e.port + "'.");
+        console.error('You probably need to use "sudo" or "sudo setcap \'cap_net_bind_service=+ep\' $(which node)"');
+    } else if ("EADDRINUSE" === e.errno) {
+        console.error("'" + e.address + ":" + e.port + "' is already being used by some other program.");
+        console.error("You probably need to stop that program or restart your computer.");
+    } else {
+        console.error(e.code + ": '" + e.address + ":" + e.port + "'");
+    }
+    console.error();
+}
+
+function wrapDefaultSniCallback(greenlock, secureOpts) {
+    // I'm not sure yet if the original SNICallback
+    // should be called before or after, so I'm just
+    // going to delay making that choice until I have the use case
+    /*
+		if (!secureOpts.SNICallback) {
+			secureOpts.SNICallback = function(servername, cb) {
+				cb(null, null);
+			};
+		}
+  */
+    if (secureOpts.SNICallback) {
+        console.warn();
+        console.warn("[warning] Ignoring the given tlsOptions.SNICallback function.");
+        console.warn();
+        console.warn("          We're very open to implementing support for this,");
+        console.warn("          we just don't understand the use case yet.");
+        console.warn("          Please open an issue to discuss. We'd love to help.");
+        console.warn();
+    }
+
+    // TODO greenlock.servername for workers
+    secureOpts.SNICallback = sni.create(greenlock, secureOpts);
+    return secureOpts;
+}

single.js

@@ -0,0 +1,36 @@
+"use strict";
+
+require("./main.js");
+
+var Single = module.exports;
+var Servers = require("./servers.js");
+
+Single.create = function(opts) {
+    var greenlock = require("./greenlock-shim.js").create(opts);
+
+    var servers = Servers.create(greenlock);
+
+    var single = {
+        ready: function(fn) {
+            fn(servers);
+            return single;
+        },
+        master: function(/*fn*/) {
+            // ignore
+            //fn(master);
+            return single;
+        },
+        serve: function(fn) {
+            // keeping backwards compat
+            if (1 === fn.length) {
+                single.ready(fn);
+                return;
+            }
+            // serving the app, right away
+            single.ready(function(glx) {
+                glx.serveApp(fn);
+            });
+        }
+    };
+    return single;
+};

sni.js

@@ -0,0 +1,215 @@
+"use strict";
+
+var sni = module.exports;
+var tls = require("tls");
+var servernameRe = /^[a-z0-9\.\-]+$/i;
+
+// a nice, round, irrational number - about every 6¼ hours
+var refreshOffset = Math.round(Math.PI * 2 * (60 * 60 * 1000));
+// and another, about 15 minutes
+var refreshStagger = Math.round(Math.PI * 5 * (60 * 1000));
+// and another, about 30 seconds
+var smallStagger = Math.round(Math.PI * (30 * 1000));
+
+//secureOpts.SNICallback = sni.create(greenlock, secureOpts);
+sni.create = function(greenlock, secureOpts) {
+    var _cache = {};
+    var defaultServername = greenlock.servername || "";
+
+    if (secureOpts.cert) {
+        // Note: it's fine if greenlock.servername is undefined,
+        // but if the caller wants this to auto-renew, they should define it
+        _cache[defaultServername] = {
+            refreshAt: 0,
+            secureContext: tls.createSecureContext(secureOpts)
+        };
+    }
+
+    return getSecureContext;
+
+    function notify(ev, args) {
+        try {
+            // TODO _notify() or notify()?
+            (greenlock.notify || greenlock._notify)(ev, args);
+        } catch (e) {
+            console.error(e);
+            console.error(ev, args);
+        }
+    }
+
+    function getSecureContext(servername, cb) {
+        //console.log("debug sni", servername);
+        if ("string" !== typeof servername) {
+            // this will never happen... right? but stranger things have...
+            console.error("[sanity fail] non-string servername:", servername);
+            cb(new Error("invalid servername"), null);
+            return;
+        }
+
+        var secureContext = getCachedContext(servername);
+        if (secureContext) {
+            //console.log("debug sni got cached context", servername, getCachedMeta(servername));
+            cb(null, secureContext);
+            return;
+        }
+
+        getFreshContext(servername)
+            .then(function(secureContext) {
+                if (secureContext) {
+                    //console.log("debug sni got fresh context", servername, getCachedMeta(servername));
+                    cb(null, secureContext);
+                    return;
+                }
+
+                // Note: this does not replace tlsSocket.setSecureContext()
+                // as it only works when SNI has been sent
+                //console.log("debug sni got default context", servername, getCachedMeta(servername));
+                if (!/PROD/.test(process.env.ENV) || /DEV|STAG/.test(process.env.ENV)) {
+                    // Change this once
+                    // A) the 'notify' message passing is verified fixed in cluster mode
+                    // B) we have a good way to let people know their server isn't configured
+                    console.debug("debug: ignoring servername " + JSON.stringify(servername));
+                    console.debug("       (it's probably either missing from your config, or a bot)");
+                    notify("servername_unknown", {
+                        servername: servername
+                    });
+                }
+                cb(null, getDefaultContext());
+            })
+            .catch(function(err) {
+                if (!err.context) {
+                    err.context = "sni_callback";
+                }
+                notify("error", err);
+                //console.log("debug sni error", servername, err);
+                cb(err);
+            });
+    }
+
+    function getCachedMeta(servername) {
+        var meta = _cache[servername];
+        if (!meta) {
+            if (!_cache[wildname(servername)]) {
+                return null;
+            }
+        }
+        return meta;
+    }
+
+    function getCachedContext(servername) {
+        var meta = getCachedMeta(servername);
+        if (!meta) {
+            return null;
+        }
+
+        // always renew in background
+        if (!meta.refreshAt || Date.now() >= meta.refreshAt) {
+            getFreshContext(servername).catch(function(e) {
+                if (!e.context) {
+                    e.context = "sni_background_refresh";
+                }
+                notify("error", e);
+            });
+        }
+
+        // under normal circumstances this would never be expired
+        // and, if it is expired, something is so wrong it's probably
+        // not worth wating for the renewal - it has probably failed
+        return meta.secureContext;
+    }
+
+    function getFreshContext(servername) {
+        var meta = getCachedMeta(servername);
+        if (!meta && !validServername(servername)) {
+            if ((servername && !/PROD/.test(process.env.ENV)) || /DEV|STAG/.test(process.env.ENV)) {
+                // Change this once
+                // A) the 'notify' message passing is verified fixed in cluster mode
+                // B) we have a good way to let people know their server isn't configured
+                console.debug("debug: invalid servername " + JSON.stringify(servername));
+                console.debug("       (it's probably just a bot trolling for vulnerable servers)");
+                notify("servername_invalid", {
+                    servername: servername
+                });
+            }
+            return Promise.resolve(null);
+        }
+
+        if (meta) {
+            // prevent stampedes
+            meta.refreshAt = Date.now() + randomRefreshOffset();
+        }
+
+        // TODO don't get unknown certs at all, rely on auto-updates from greenlock
+        // Note: greenlock.get() will return an existing fresh cert or issue a new one
+        return greenlock.get({ servername: servername }).then(function(result) {
+            var meta = getCachedMeta(servername);
+            if (!meta) {
+                meta = _cache[servername] = { secureContext: { _valid: false } };
+            }
+            // prevent from being punked by bot trolls
+            meta.refreshAt = Date.now() + smallStagger;
+
+            // nothing to do
+            if (!result) {
+                return null;
+            }
+
+            // we only care about the first one
+            var pems = result.pems;
+            var site = result.site;
+            if (!pems || !pems.cert) {
+                // nothing to do
+                // (and the error should have been reported already)
+                return null;
+            }
+
+            meta = {
+                refreshAt: Date.now() + randomRefreshOffset(),
+                secureContext: tls.createSecureContext({
+                    // TODO support passphrase-protected privkeys
+                    key: pems.privkey,
+                    cert: pems.cert + "\n" + pems.chain + "\n"
+                })
+            };
+            meta.secureContext._valid = true;
+
+            // copy this same object into every place
+            (result.altnames || site.altnames || [result.subject || site.subject]).forEach(function(altname) {
+                _cache[altname] = meta;
+            });
+
+            return meta.secureContext;
+        });
+    }
+
+    function getDefaultContext() {
+        return getCachedContext(defaultServername);
+    }
+};
+
+// whenever we need to know when to refresh next
+function randomRefreshOffset() {
+    var stagger = Math.round(refreshStagger / 2) - Math.round(Math.random() * refreshStagger);
+    return refreshOffset + stagger;
+}
+
+function validServername(servername) {
+    // format and (lightly) sanitize sni so that users can be naive
+    // and not have to worry about SQL injection or fs discovery
+
+    servername = (servername || "").toLowerCase();
+    // hostname labels allow a-z, 0-9, -, and are separated by dots
+    // _ is sometimes allowed, but not as a "hostname", and not by Let's Encrypt ACME
+    // REGEX // https://www.codeproject.com/Questions/1063023/alphanumeric-validation-javascript-without-regex
+    return servernameRe.test(servername) && -1 === servername.indexOf("..");
+}
+
+function wildname(servername) {
+    return (
+        "*." +
+        servername
+            .split(".")
+            .slice(1)
+            .join(".")
+    );
+}

test/greenlock.js

@@ -0,0 +1,85 @@
+#!/usr/bin/env node
+var Greenlock = require("../");
+var greenlock = Greenlock.create({
+    version: "draft-11",
+    server: "https://acme-staging-v02.api.letsencrypt.org/directory",
+    agreeTos: true,
+    approvedDomains: ["example.com", "www.example.com"],
+    configDir: require("path").join(require("os").tmpdir(), "acme"),
+
+    app: require("express")().use("/", function(req, res) {
+        res.setHeader("Content-Type", "text/html; charset=utf-8");
+        res.end("Hello, World!\n\n💚 🔒.js");
+    })
+});
+
+var server1 = greenlock.listen(5080, 5443);
+server1.on("listening", function() {
+    console.log("### THREE 3333 - All is well server1", this.address());
+    setTimeout(function() {
+        // so that the address() object doesn't disappear
+        server1.close();
+        server1.unencrypted.close();
+    }, 10);
+});
+setTimeout(function() {
+    var server2 = greenlock.listen(6080, 6443, function() {
+        console.log("### FIVE 55555 - Started server 2!");
+        setTimeout(function() {
+            server2.close();
+            server2.unencrypted.close();
+            server6.close();
+            server6.unencrypted.close();
+            server7.close();
+            server7.unencrypted.close();
+            setTimeout(function() {
+                // TODO greenlock needs a close event (and to listen to its server's close event)
+                process.exit(0);
+            }, 1000);
+        }, 1000);
+    });
+    server2.on("listening", function() {
+        console.log("### FOUR 44444 - All is well server2", server2.address());
+    });
+}, 1000);
+
+var server3 = greenlock.listen(
+    22,
+    22,
+    function() {
+        console.error("Error: expected to get an error when launching plain server on port 22");
+    },
+    function() {
+        console.error("Error: expected to get an error when launching " + server3.type + " server on port 22");
+    }
+);
+server3.unencrypted.on("error", function() {
+    console.log("Success: caught expected (plain) error");
+});
+server3.on("error", function() {
+    console.log("Success: caught expected " + server3.type + " error");
+    //server3.close();
+});
+
+var server4 = greenlock.listen(
+    7080,
+    7443,
+    function() {
+        console.log("Success: server4: plain");
+        server4.unencrypted.close();
+    },
+    function() {
+        console.log("Success: server4: " + server4.type);
+        server4.close();
+    }
+);
+
+var server5 = greenlock.listen(10080, 10443, function() {
+    console.log("Server 5 with one fn", this.address());
+    server5.close();
+    server5.unencrypted.close();
+});
+
+var server6 = greenlock.listen("[::]:11080", "[::1]:11443");
+
+var server7 = greenlock.listen("/tmp/gl.plain.sock", "/tmp/gl.sec.sock");

worker.js

@@ -0,0 +1,73 @@
+"use strict";
+
+var Worker = module.exports;
+// *very* generous, but well below the http norm of 120
+var messageTimeout = 30 * 1000;
+var msgPrefix = "greenlock:";
+
+Worker.create = function() {
+    var greenlock = {};
+    ["getAcmeHttp01ChallengeResponse", "get", "notify", "_notify"].forEach(function(k) {
+        greenlock[k] = function(args) {
+            return rpc(k, args);
+        };
+    });
+
+    var worker = {
+        ready: function(fn) {
+            var servers = require("./servers.js").create(greenlock);
+            fn(servers);
+            return worker;
+        },
+        master: function() {
+            // ignore
+            return worker;
+        },
+        serve: function(fn) {
+            // keeping backwards compat
+            if (1 === fn.length) {
+                worker.ready(fn);
+                return;
+            }
+            // serving the express app, right away
+            worker.ready(function(glx) {
+                glx.serveApp(fn);
+            });
+        }
+    };
+    return worker;
+};
+
+function rpc(funcname, msg) {
+    return new Promise(function(resolve, reject) {
+        var rnd = Math.random()
+            .toString()
+            .slice(2)
+            .toString(16);
+        var id = msgPrefix + rnd;
+        var timeout;
+
+        function getResponse(msg) {
+            if (msg._id !== id) {
+                return;
+            }
+            process.removeListener("message", getResponse);
+            clearTimeout(timeout);
+            resolve(msg._result);
+        }
+
+        // TODO keep a single listener than just responds
+        // via a collection of callbacks? or leave as is?
+        process.on("message", getResponse);
+        process.send({
+            _id: id,
+            _funcname: funcname,
+            _input: msg
+        });
+
+        timeout = setTimeout(function() {
+            process.removeListener("message", getResponse);
+            reject(new Error("worker rpc request timeout"));
+        }, messageTimeout);
+    });
+}