einbahn
Advanced tools
Readme
Server-Sent Events with Namespaces and Channels
a minimal working example using koa
const Koa = require('koa')
const {SSE, koaMiddleware} = require('einbahn')
const app = new Koa()
const sse = new SSE()
sse.on('connection', client => {
client.send({event: 'welcome', data: 'message from server'})
})
app.use(koaMiddleware(sse))
app.use((ctx, next) => {
ctx.body = `<html><meta charset='utf8'/><script>
let es = new EventSource('/')
es.addEventListener('welcome', ({ data }) => {
alert(JSON.parse(data))
})
</script></html>`
})
app.listen(3000, err => console.log(err ? err : 'listen on http://localhost:3000'))
by default all client are connected to the / namespace:
new EventSource('/')
to connect to a specific namespace:
new EventSource('/namespace1')
server side code
const ns1 = sse.of('/namespace1')
// send event to all client within the namespace
ns1.send({event: 'time', data: new Date()})
a namespace can have multiple channels, to join client to a channel:
sse.on('connection', (client, lastId, query) => {
client.join('chan1')
sse.to('chan1').send({data: new Date()})
})
FAQs
sever sent events with namespaces and channels
The npm package einbahn receives a total of 0 weekly downloads. As such, einbahn popularity was classified as not popular.
We found that einbahn demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Git dependencies in open source packages can introduce significant risks, including lack of version control, stability issues, dependency drift, and difficulty in auditing, making them potential targets for supply chain attacks.
Security News
Node.js has added experimental support for TypeScript, a move that highlights the growing importance of TypeScript in modern development.
Product
Check out what's new at Socket with our Product Changelog. It tracks all public-facing updates, improvements, and fixes so you can take full advantage of our features.