goldilocks.js/README.md

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Goldilocks
==========
The node.js netserver that's just right.
* **HTTPS Web Server** with Automatic TLS (SSL) via ACME ([Let's Encrypt](https://letsencrypt.org))
* Static Web Server
* URL Redirects
* SSL on localhost (with bundled localhost.daplie.me certificates)
* Uses node cluster to take advantage of multiple CPUs
* **TLS** name-based (SNI) proxy
* **TCP** port-based proxy
* WS **Tunnel Server** (i.e. run on Digital Ocean and expose a home-firewalled Raspberry Pi to the Internet)
* WS **Tunnel Client** (i.e. run on a Raspberry Pi and connect to a Daplie Tunnel)
* Configurable via API
* mDNS Discoverable (configure in home or office with mobile and desktop apps)
* OAuth3 Authentication
Install Standalone
-------
```bash
# v1 in npm
npm install -g goldilocks
# v1 in git (via ssh)
npm install -g git+ssh://git@git.daplie.com:Daplie/goldilocks.js#v1
# v1 in git (unauthenticated)
npm install -g git+https://git@git.daplie.com:Daplie/goldilocks.js#v1
```
```bash
goldilocks
```
```bash
Serving /Users/foo/ at https://localhost.daplie.me:8443
```
Install as a System Service (daemon-mode)
We have service support for
* systemd (Linux, Ubuntu)
* launchd (macOS)
```bash
curl https://git.daplie.com/Daplie/goldilocks.js/raw/master/install.sh | bash
```
Modules & Configuration
-----
Goldilocks has several core systems, which all have their own configuration and some of which have modules:
```
* http
- static
- redirect
- proxy (reverse proxy)
* tls
- acme
- proxy (reverse proxy)
* tcp
- forward
* tunnel_server
* tunnel_client
* mdns
* api
```
### http
The HTTP system handles plain http (TLS / SSL is handled by the tls system)
```yml
http:
trust_proxy: true # allow localhost, 192.x, 10.x, 172.x, etc to set headers
allow_insecure: false # allow non-https even without proxy https headers
primary_domain: example.com # attempts to access via IP address will redirect here
# modules can be nested in domains
domains:
- names:
- example.com
modules:
- name: static
root: /srv/www/:hostname
# The configuration above could also be represented as follows:
modules:
- name: static
domains:
- example.com
root: /srv/www/:hostname
```
### http.static - how to serve a web page
The static module is for serving static web pages and assets and has the following options:
```
root The path to serve as a string.
The template variable `:hostname` represents the HTTP Host header without port information
ex: `root: /srv/www/example.com` would load the example.com folder for any domain listed
ex: `root: /srv/www/:hostname` would load `/srv/www/example.com` if so indicated by the Host header
```
Example config:
```yml
http:
modules:
- name: static
domains:
- example.com
root: /srv/www/:hostname
```
### http.proxy - how to reverse proxy (ruby, python, etc)
The proxy module is for reverse proxying, typically to an application on the same machine.
It has the following options:
```
host The DNS-resolvable hostname (or IP address) of the system to which the request will be proxied
ex: localhost
ex: 192.168.1.100
port The port on said system to which the request will be proxied
ex: 3000
ex: 80
```
Example config:
```yml
http:
modules:
- name: proxy
domains:
- example.com
host: localhost
port: 3000
```
### http.redirect - how to redirect URLs
The redirect module is for, you guessed it, redirecting URLs.
It has the following options:
```
status The HTTP status code to issue (301 is usual permanent redirect, 302 is temporary)
ex: 301
from The URL path that was used in the request.
The `*` wildcard character can be used for matching a full segment of the path
ex: /photos/
ex: /photos/*/*/
to The new URL path which should be used.
If wildcards matches were used they will be available as `:1`, `:2`, etc.
ex: /pics/
ex: /pics/:1/:2/
```
Example config:
```yml
http:
modules:
- name: proxy
domains:
- example.com
status: 301
from: /archives/*/*/*/
to: https://example.net/year/:1/month/:2/day/:3/
```
### tls
The tls system handles encrypted connections, including fetching certificates,
and uses ServerName Indication (SNI) to determine if the connection should be handled
by the http system, a tls system module, or rejected.
It has the following options:
```
acme.email The default email address for ACME certificate issuance
ex: john.doe@example.com
acme.server The default ACME server to use
ex: https://acme-v01.api.letsencrypt.org/directory
ex: https://acme-staging.api.letsencrypt.org/directory
acme.challenge_type The default ACME challenge to request
ex: http-01, dns-01, tls-01
acme.approved_domains The domains for which to request certificates
ex: example.com
```
Example config:
```yml
tls:
acme:
email: 'joe.shmoe@example.com'
# IMPORTANT: Switch to in production 'https://acme-v01.api.letsencrypt.org/directory'
server: 'https://acme-staging.api.letsencrypt.org/directory'
challenge_type: 'http-01'
approved_domains:
- example.com
- example.net
modules:
- name: proxy
domains:
- example.com
- example.net
address: '127.0.0.1:6443'
```
Certificates are saved to `~/acme`, which may be `/var/www/acme` if Goldilocks is run as the www-data user.
### tls.acme
The acme module overrides the acme defaults of the tls system and uses the same options except that `approved_domains`
(in favor of the domains in the scope of the module).
Example config:
```yml
tls:
modules:
- name: acme
domains:
- example.com
- example.net
email: 'joe.shmoe@example.com'
server: 'https://acme-staging.api.letsencrypt.org/directory'
challenge_type: 'http-01'
```
### tls.proxy
The proxy module routes the traffic based on the ServerName Indication (SNI) **without decrypting** it.
It has the following options:
```
address The hostname (or IP) and port of the system or application that should receive the traffic
```
Example config:
```yml
tls:
modules:
- name: proxy
domains:
- example.com
address: '127.0.0.1:5443'
```
### tcp
The tcp system handles all tcp network traffic **before decryption** and may use port numbers
or traffic sniffing to determine how the connection should be handled.
It has the following options:
```
bind An array of numeric ports on which to bind
ex: 80
```
Example Config
```yml
tcp:
bind:
- 22
- 80
- 443
modules:
- name: forward
ports:
- 22
address: '127.0.0.1:2222'
```
### tcp.forward
The forward module routes traffic based on port number **without decrypting** it.
It has the following options:
```
ports A numeric array of source ports
ex: 22
address The destination hostname and port
ex: 127.0.0.1:2222
```
Example Config
```yml
tcp:
bind:
- 22
- 80
- 443
modules:
- name: forward
ports:
- 22
address: '127.0.0.1:2222'
```
### tunnel\_server
The tunnel server system is meant to be run on a publicly accessible IP address to server tunnel clients
which are behind firewalls, carrier-grade NAT, or otherwise Internet-connect but inaccessible devices.
It has the following options:
```
secret A 128-bit or greater string to use for signing tokens (HMAC JWT)
ex: abc123
servernames An array of string servernames that should be captured as the tunnel server, ignoring the TLS forward module
ex: api.tunnel.example.com
```
Example config:
```yml
tunnel_server:
secret: abc123def456ghi789
servernames:
- 'api.tunnel.example.com'
```
### tunnel
The tunnel client is meant to be run from behind a firewalls, carrier-grade NAT,
or otherwise inaccessible devices to allow them to be accessed publicly on the
internet.
It has no options per se, but is rather a list of tokens that can be used to
connect to tunnel servers. If the token does not have an `aud` field it must be
provided in an object with the token provided in the `jwt` field and the tunnel
server url provided in the `tunnelUrl` field.
Example config:
```yml
tunnel:
- 'some.jwt_encoded.token'
- jwt: 'other.jwt_encoded.token'
tunnelUrl: 'wss://api.tunnel.example.com/'
```
### ddns
TODO
### mdns
enabled by default
Although it does not announce itself, Goldilocks is discoverable via mDNS with the special query `_cloud._tcp.local`.
This is so that it can be easily configured via Desktop and Mobile apps when run on devices such as a Raspberry Pi or
SOHO servers.
```yaml
mdns:
disabled: false
port: 5353
broadcast: '224.0.0.251'
ttl: 300
```
You can discover goldilocks with `mdig`.
```
npm install -g git+https://git.daplie.com/Daplie/mdig.git
mdig _cloud._tcp.local
```
### api
The API system is intended for use with Desktop and Mobile clients.
It must be accessed using one of the following domains as the Host header:
```
admin.invalid
localhost.admin.daplie.me
```
@tigerbot: How are the APIs used (in terms of URL, Method, Headers, etc)?
TODO
----
* http - nowww module
* http - Allow match styles of `www.*`, `*`, and `*.example.com` equally
* http - redirect based on domain name (not just path)
* tcp - bind should be able to specify localhost, uniquelocal, private, or ip
* tcp - if destination host is omitted default to localhost, if dst port is missing, default to src
* sys - handle SIGHUP
* sys - `curl https://daplie.me/goldilocks | bash -s example.com`
* oauth3 - `example.com/.well-known/domains@oauth3.org/directives.json`
* oauth3 - commandline questionnaire
* modules - use consistent conventions (i.e. address vs host + port)
* tls - tls.acme vs tls.modules.acme
* tls - forward should be able to match on source port to reach different destination ports