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HackMD

Join the chat at https://gitter.im/hackmdio/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 npm/bower dependencies and create configs. The setup script is written in Bash, you would need bash as a prerequisite.
  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.