HackMD

HackMD lets you create realtime collaborative markdown notes on all platforms.
Inspired by Hackpad, with more focus on speed and flexibility.
Still in the early stage, feel free to fork or contribute to HackMD.

Thanks for using! 😄

docker-hackmd

Before you go too far, here is the great docker repo for HackMD.
With docker, you can deploy a server in minutes without any downtime.

migration-to-0.4.0

We've dropped MongoDB after version 0.4.0.
So here is the migration tool for you to transfer the old DB data to the new DB.
This tool is also used for official service.

Browsers Requirement

• Chrome >= 45, Chrome for Android >= 47
• Safari >= 9, iOS Safari >= 8.4
• Firefox >= 44
• IE >= 9, Edge >= 12
• Opera >= 34, Opera Mini not supported
• Android Browser >= 4.4

Prerequisite

• Node.js 4.x or up (test up to 6.2.2)
• Database (PostgreSQL, MySQL, MariaDB, SQLite, MSSQL)
• npm and bower

Get started

1. Download a release and unzip or clone into a directory
2. Enter the directory and type bin/setup, which will install all the dependencies and create config file
3. Setup the configs, see more below
4. Setup environment variables which will overwrite the configs
5. Run the server as you like (node, forever, pm2)

Upgrade guide

If you are upgrading HackMD from an older version, follow these steps:

1. Fully stop your old server first (important)
2. git pull or do whatever that updates the files
3. npm install && bower install to update dependencies
4. Modify the file named .sequelizerc, change the value of the variable url with your db connection string For example: postgres://username:password@localhost:5432/hackmd
5. Run node_modules/.bin/sequelize db:migrate, this step will migrate your db to the latest schema
6. Start your whole new server!

Structure

hackmd/
├── tmp/            --- temporary files
├── docs/           --- document files
├── lib/            --- server libraries
└── public/         --- client files
    ├── css/        --- css styles
    ├── js/         --- js scripts
    ├── vendor/     --- vendor includes
    └── views/      --- view templates

Configuration files

There are some configs you need to change in the files below

./config.json			--- for server settings
./public/js/common.js	--- for client settings

Client settings common.js

variables	example values	description
debug	true or false	set debug mode, show more logs
domain	localhost	domain name
urlpath	hackmd	sub url path, like: www.example.com/<urlpath>

Environment variables (will overwrite other server configs)

variables	example values	description
NODE_ENV	production or development	set current environment (will apply corresponding settings in the config.json)
DOMAIN	hackmd.io	domain name
URL_PATH	hackmd	sub url path, like www.example.com/<URL_PATH>
PORT	80	web app port
DEBUG	true or false	set debug mode, show more logs

Server settings config.json

variables	example values	description
debug	true or false	set debug mode, show more logs
domain	localhost	domain name
urlpath	hackmd	sub url path, like www.example.com/<urlpath>
port	80	web app port
alloworigin	['localhost']	domain name whitelist
usessl	true or false	set to use ssl server (if true will auto turn on protocolusessl)
protocolusessl	true or false	set to use ssl protocol for resources path
urladdport	true or false	set to add port on callback url (port 80 or 443 won't applied)
usecdn	true or false	set to use CDN resources or not
db	{ "dialect": "sqlite", "storage": "./db.hackmd.sqlite" }	set the db configs, see more here
sslkeypath	./cert/client.key	ssl key path (only need when you set usessl)
sslcertpath	./cert/hackmd_io.crt	ssl cert path (only need when you set usessl)
sslcapath	['./cert/COMODORSAAddTrustCA.crt']	ssl ca chain (only need when you set usessl)
dhparampath	./cert/dhparam.pem	ssl dhparam path (only need when you set usessl)
tmppath	./tmp/	temp directory path
defaultnotepath	./public/default.md	default note file path
docspath	./public/docs	docs directory path
indexpath	./public/views/index.ejs	index template file path
hackmdpath	./public/views/hackmd.ejs	hackmd template file path
errorpath	./public/views/error.ejs	error template file path
prettypath	./public/views/pretty.ejs	pretty template file path
slidepath	./public/views/slide.hbs	slide template file path
sessionname	connect.sid	cookie session name
sessionsecret	secret	cookie session secret
sessionlife	14 * 24 * 60 * 60 * 1000	cookie session life
staticcachetime	1 * 24 * 60 * 60 * 1000	static file cache time
heartbeatinterval	5000	socket.io heartbeat interval
heartbeattimeout	10000	socket.io heartbeat timeout
documentmaxlength	100000	note max length

Third-party integration api key settings

service	file path	description
facebook, twitter, github, gitlab, dropbox, google	config.json	for signin
imgur	config.json	for image upload
google drive, dropbox	public/js/common.js	for export and import

Third-party integration oauth callback urls

service	callback url (after the server url)
facebook	/auth/facebook/callback
twitter	/auth/twitter/callback
github	/auth/github/callback
gitlab	/auth/gitlab/callback
dropbox	/auth/dropbox/callback
google	/auth/google/callback

Operational Transformation

From 0.3.2, we started supporting operational transformation.
It makes concurrent editing safe and will not break up other users' operations.
Additionally, now can show other clients' selections.
See more at http://operational-transformation.github.io/

License under MIT.