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Built with Elixir. supabase.io Apache-2.0 License 2.9k stars 113 forks Star Notifications * Code * Issues 8 * Pull requests 5 * Actions * Projects 0 * Wiki * Security * Insights More * Code * Issues * Pull requests * Actions * Projects * Wiki * Security * Insights master Switch branches/tags [ ] Branches Tags Nothing to show {{ refName }} default View all branches Nothing to show {{ refName }} default View all tags 9 branches 35 tags Go to file Code Clone HTTPS GitHub CLI [https://github.com/s] Use Git or checkout with SVN using the web URL. [gh repo clone supaba] Work fast with our official CLI. Learn more. * Open with GitHub Desktop * Download ZIP Launching GitHub Desktop If nothing happens, download GitHub Desktop and try again. Go back Launching GitHub Desktop If nothing happens, download GitHub Desktop and try again. Go back Launching Xcode If nothing happens, download Xcode and try again. Go back Launching Visual Studio If nothing happens, download the GitHub extension for Visual Studio and try again. Go back Latest commit @kiwicopple kiwicopple Cleans up the README ... c4d03a4 Apr 28, 2021 Cleans up the README we no longer need a Table of Contents since this is handled by github I also removed a few older sections which I felt weren't important c4d03a4 Git stats * 265 commits Files Permalink Failed to load latest commit information. Type Name Latest commit message Commit time .github fix(release): up docker/build-push-action to v2 Apr 20, 2021 ansible docs: remove SECRET_KEY_BASE in docs & examples Jan 20, 2021 dev/postgres/mnt feat: Support event filter (#76) Dec 14, 2020 examples chore(deps): bump y18n from 3.2.1 to 3.2.2 in /examples/node-js Mar 31, 2021 scripts chore: prepare Realtime for Marketplaces (#49) Jun 3, 2020 server fix: specify db connect via IPv4 Apr 27, 2021 .dockerignore Setting up a production docker build of realtime server Jan 12, 2020 .gitignore Hiding the .examples folder which seems to be a result of the docker ... Jan 22, 2020 Dockerfile docs: Convert SECURE_CHANNELS value from boolean to string (#108) Jan 25, 2021 LICENSE Create LICENSE Oct 11, 2019 Makefile Moving release instructions to Makefile Feb 25, 2020 README.md Cleans up the README Apr 28, 2021 aws.json chore: update realtime_version in Ansible & Packer Jun 3, 2020 do.json chore: update realtime_version in Ansible & Packer Jun 3, 2020 docker-compose.db.yml Kaizen/cleanup while testing May 21, 2020 docker-compose.dev.yml docs: Convert SECURE_CHANNELS value from boolean to string (#108) Jan 25, 2021 View code Supabase Realtime Hiring Status Introduction What is this? Why not just use PostgreSQL's NOTIFY? What are the benefits? Example Quick start Client libraries Server Database set up Server set up Channels Authorization License Credits Sponsors README.md Supabase Realtime Listens to changes in a PostgreSQL Database and broadcasts them over websockets. Demo Hiring Supabase is hiring Elixir experts to work full-time on this repo. If you have the experience, apply online. Status * [*] Alpha: Under heavy development * [*] Public Alpha: Ready for use. But go easy on us, there may be a few kinks. * [*] Public Beta: Stable enough for most non-enterprise use-cases * [ ] Public: Production-ready This repo is still under heavy development and the documentation is evolving. You're welcome to try it, but expect some breaking changes. Watch "releases" of this repo to get notified of major updates. And give us a star if you like it! Watch this repo Introduction What is this? This is an Elixir server (Phoenix) that allows you to listen to changes in your database via websockets. It works like this: 1. the Phoenix server listens to PostgreSQL's replication functionality (using Postgres' logical decoding) 2. it converts the byte stream into JSON 3. it then broadcasts over websockets. Why not just use PostgreSQL's NOTIFY? A few reasons: 1. You don't have to set up triggers on every table 2. NOTIFY has a payload limit of 8000 bytes and will fail for anything larger. The usual solution is to send an ID then fetch the record, but that's heavy on the database 3. This server consumes one connection to the database, then you can connect many clients to this server. Easier on your database, and to scale up you just add realtime servers What are the benefits? 1. The beauty of listening to the replication functionality is that you can make changes to your database from anywhere - your API, directly in the DB, via a console etc - and you will still receive the changes via websockets. 2. Decoupling. For example, if you want to send a new slack message every time someone makes a new purchase you might build that functionality directly into your API. This allows you to decouple your async functionality from your API. 3. This is built with Phoenix, an extremely scalable Elixir framework Example import { Socket } = '@supabase/realtime-js' var socket = new Socket(process.env.REALTIME_URL) socket.connect() // Listen to all changes to user ID 99 var allChanges = this.socket.channel('realtime:public:users:id.eq.99') .join() .on('*', payload => { console.log('Update received!', payload) }) // Listen to only INSERTS on the 'users' table in the 'public' schema var allChanges = this.socket.channel('realtime:public:users') .join() .on('INSERT', payload => { console.log('Update received!', payload) }) // Listen to all updates from the 'public' schema var allChanges = this.socket.channel('realtime:public') .join() .on('UPDATE', payload => { console.log('Update received!', payload) }) // Listen to all changes in the database let allChanges = this.socket.channel('realtime:*') .join() .on('*', payload => { console.log('Update received!', payload) }) Quick start We have set up some simple examples that show how to use this server: * Next.js example * NodeJS example Client libraries * Javascript: @supabase/realtime-js * Python: @supabase/realtime-py * Dart: @supabase/realtime-dart * C#: @supabase/realtime-csharp [WIP] Server Database set up There are a some requirements for your database 1. It must be Postgres 10+ as it uses logical replication 2. Set up your DB for replication 1. it must have the wal_level set to logical. You can check this by running SHOW wal_level;. To set the wal_level, you can call ALTER SYSTEM SET wal_level = logical; 2. You must set max_replication_slots to at least 1: ALTER SYSTEM SET max_replication_slots = 5; 3. Create a PUBLICATION for this server to listen to: CREATE PUBLICATION supabase_realtime FOR ALL TABLES; 4. [OPTIONAL] If you want to receive the old record (previous values) on UPDATE and DELETE, you can set the REPLICA IDENTITY to FULL like this: ALTER TABLE your_table REPLICA IDENTITY FULL;. This has to be set for each table unfortunately. Server set up The easiest way to get started is just to use our docker image. We will add more deployment methods soon. # Update the environment variables to point to your own database docker run \ -e DB_HOST='docker.for.mac.host.internal' \ -e DB_NAME='postgres' \ -e DB_USER='postgres' \ -e DB_PASSWORD='postgres' \ -e DB_PORT=5432 \ -e PORT=4000 \ -e HOSTNAME='localhost' \ -e JWT_SECRET='SOMETHING_SUPER_SECRET' \ -p 4000:4000 \ supabase/realtime OPTIONS DB_HOST # {string} Database host URL DB_NAME # {string} Postgres database name DB_USER # {string} Database user DB_PASSWORD # {string} Database password DB_PORT # {number} Database port SLOT_NAME # {string} A unique name for Postgres to track where this server has "listened until". If the server dies, it can pick up from the last position. This should be lowercase. PORT # {number} Port which you can connect your client/listeners SECURE_CHANNELS # {string} (options: 'true' or 'false') Enable/Disable channels authorization via JWT verification. JWT_SECRET # {string} HS algorithm octet key (e.g. "95x0oR8jq9unl9pOIx"). Only required if SECURE_CHANNELS is set to true. JWT_CLAIM_VALIDATORS # {string} Expected claim key/value pairs compared to JWT claims via equality checks in order to validate JWT. e.g. '{"iss": "Issuer", "nbf": 1610078130}'. This is optional but encouraged. EXAMPLE: RUNNING SERVER WITH ALL OPTIONS # Update the environment variables to point to your own database docker run \ -e DB_HOST='docker.for.mac.host.internal' \ -e DB_NAME='postgres' \ -e DB_USER='postgres' \ -e DB_PASSWORD='postgres' \ -e DB_PORT=5432 \ -e PORT=4000 \ -e HOSTNAME='localhost' \ -e JWT_SECRET='SOMETHING_SUPER_SECRET' \ -p 4000:4000 \ -e SECURE_CHANNELS='true' \ -e JWT_SECRET='jwt-secret' \ -e JWT_CLAIM_VALIDATORS='{"iss": "Issuer", "nbf": 1610078130}' \ supabase/realtime Channels Authorization Channels connections are authorized via JWT verification. Only supports JWTs signed with the following algorithms: * HS256 * HS384 * HS512 Verify JWT claims by setting JWT_CLAIM_VALIDATORS: e.g. {'iss': 'Issuer', 'nbf': 1610078130} Then JWT's "iss" value must equal "Issuer" and "nbf" value must equal 1610078130. NOTE: JWT expiration is checked automatically. Development: Channels are not secure by default. Set SECURE_CHANNELS to true to test JWT verification locally. Production: Channels are secure by default and you must set JWT_SECRET. Set SECURE_CHANNELS to false to proceed without checking authorization. License This repo is licensed under Apache 2.0. Credits * https://github.com/phoenixframework/phoenix - The server is built with the amazing elixir framework. * https://github.com/cainophile/cainophile - A lot of this implementation leveraged the work already done on Cainophile. * https://github.com/mcampa/phoenix-channels - The client library is ported from this library. Sponsors We are building the features of Firebase using enterprise-grade, open source products. We support existing communities wherever possible, and if the products don't exist we build them and open source them ourselves. New Sponsor About Listen to your to PostgreSQL database in realtime via websockets. Built with Elixir. supabase.io Topics postgres elixir phoenix workflow-engine realtime postgresql workflows cdc phoenix-framework change-data-capture Resources Readme License Apache-2.0 License Releases 35 v0.13.3 Latest Apr 27, 2021 + 34 releases Sponsor this project Sponsor Learn more about GitHub Sponsors Packages 0 No packages published Contributors 14 * @kiwicopple * @w3b6x9 * @soedirgo * @awalias * @dragarcia * @dependabot * @fracek * @darora * @0xflotus * @benmccann * @abc3 + 3 contributors Languages * Elixir 81.6% * Shell 15.2% * Makefile 1.2% * Other 2.0% * (c) 2021 GitHub, Inc. * Terms * Privacy * Security * Status * Docs * Contact GitHub * Pricing * API * Training * Blog * About You can't perform that action at this time. You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.