Build Realtime Secured Apps using Wsify v2

Websocketify (wsify) v2.0

Just a tiny, simple and realtime pub/sub messaging service

Why

I wanted to create a tiny solution that can replace pusher and similar services and learning more about the realtime world, so I dispatched this project.

Features

• No dependencies, just a single binary !
• Light and Tiny.
• Event-Driven Design webhooks .
• A client can listen on any resource.
• You control whether a client is allowed to connect , subscribe , unsubscribe using any programming language !.
• A client defines itself using key via the url query param i.e ?key=123 .
• Send messages to only certain users.

Installation

• Docker ? > docker run --network host alash3al/wsify -listen :8080 -webhook "http://localhost/wsify.php"
• Binary ? > goto the releases page and download yours.
• From Source ? > go get -u github.com/alash3al/wsify

Questions

(1)- How can a client/device connect to the websocket service?

by simply connecting to the following endpoint ws://your.wsify.service:port/subscribe

(2)- How can a client subscribe to a certain channel(s)/topic(s)?

after connecting to the main websocket service /subscribe , you can send a simple json payload commands to ask wsify to subscribe / unsubscribe you to/from any channel/topic you want!

(3)- What is the commands format?

{
	"action": "subscribe",
	"value": "testchan"
}

(4)- Can I control the client command so I can allow/disallow certain users?

Yes, each client can define itself using a query param ?key=client1 , this key will be passed to the webhook endpoint as well as the event being executed, and here is the event format:

{
	// one of the following: connect|subscribe|unsubscribe|disconnect
	"action": "subscribe",

	// the channel if provided
	"value": "testchan",

	// the key provided by the client
	"key": "client1"
}

(5)- How can I publish message to i.e testchan ?

Just a post request to /publish with the following format:

{
	// the channel you want to publish to
	"channel": "testchan",

	// the data to be send (any format)
	"payload": "testchan",

	// array of clients "keys" (if you want certain clients only to receive the message)
	"to": []
}

i.e

curl -X POST \
	-H "Content-Type: application/json" \
	-d '{"payload": "hi from the terminal", "channel": "testchan"}' \
	http://localhost:4040/publish

(6)- Can I skip the webhook events for testing?

Yes, wsify --events="" empty events means "NO WEBHOOK, WSIFY!"

(7)- How can I secure the publish endpoint, so no one except me can publish ?!!

Easy :), Just change the endpoint to something more secure and hard to guess it is an alternative to access tokens .. etc, wsify --publish="/broadcasteiru6chefoh1Yee0MohJ2um5eepaephies3zonai0Cae7quaeb"

(8)- What about other options?

wsify --help will help you !

(9)- What is the websocket client used in demos?

Simple Websocket Client

(10)- How I can use it over SSl/TLS with Nginx?

You can use proxy, add this lines on your Nginx configration

location /websocket/subscribe {
        proxy_pass http://localhost:4040/subscribe;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
    }

Now you can call websocket by wss://yourdomain.com/websocket/subscribe

Author

This project has been created by Mohamed Al Ashaal a Crazy Gopher ^^!

Contribution

• Fork the Repo
• Create a feature branch
• Push your changes to the created branch
• Create a pull request.

License

Wsify is open-sourced software licensed under the MIT License .