Sinclairzx81 Smoke Save

Run Web Servers in Web Browsers over WebRTC

Project README


Run Web Servers in Web Browsers over WebRTC

Test npm version License


Smoke enables Browsers run micro Web Servers over WebRTC

import { Network } from '@sinclair/smoke'

// ------------------------------------------------------------------
// Create a Virtual Network
// ------------------------------------------------------------------

const { Http } = new Network()

// ------------------------------------------------------------------
// Create a Http Listener on a Virtual Port
// ------------------------------------------------------------------

Http.listen({ port: 5000 }, request => new Response('hello webrtc'))

// ------------------------------------------------------------------
// Fetch data over WebRTC
// ------------------------------------------------------------------

const text = Http.fetch('http://localhost:5000').then(r => r.text())


$ npm install @sinclair/smoke


Smoke is an experimental networking and storage framework for the browser that provides Http, Tcp and WebSocket emulation over WebRTC and large file storage via IndexedDB. It is built as a foundation for developing peer to peer services in the browser with each browser accessible via an application controlled virtual network.

Smoke reshapes WebRTC into WinterCG compatible interfaces enabling traditional web server applications to be made portable between server and browser environments. It is developed in support of alternative software architectures where user centric services can be moved away from the cloud and run peer to peer in the browser.

Licence MIT



Smoke networking API's are provided by way of Network objects. A Network object represents an active connection to a shared signalling Hub and exposes the Http, Net and Media functionality used to communicate with other Network objects connected to the same Hub.

import { Network, Hubs } from '@sinclair/smoke'

const { Http, Net, Media, Hub } = new Network({ hub: new Hubs.Private() })

const address = await Hub.address() // The address of this Network object.


A Private hub is an in-memory relay that forwards WebRTC ICE messages by way of the browser's BroadcastChannel API. A private hub can only relay messages to the page and other tabs running within the same browser process. Because private hubs cannot facilitate connections made outside the current page, it is considered private. This Hub is the default.

import { Network, Hubs } from '@sinclair/smoke'

const { Http } = new Network({ hub: new Hubs.Private() })


The implementation of this hub is currently pending.

import { Network, Hubs } from '@sinclair/smoke'

const { Http } = new Network({ hub: new Hubs.Public('ws://server/hub') })


The Http API supports Http listen and fetch over WebRTC. It also provides WebSocket emulation.

const { Http } = new Network()


Use the Http listen function to receive Http requests from remote peers.

Http.listen({ port: 5000 }, request => new Response('hello'))


Use Http fetch function to make a Http request to remote peers.

const response = await Http.fetch('http://localhost:5000')

const message = await response.text()


Use upgrade function to convert a Http request into a WebSocket

Http.listen({ port: 5000 }, request => Http.upgrade(request, (socket) => socket.send('hello')))


Use connect function to establish a connection remote WebSocket server.

const socket = await Http.connect('ws://localhost:5000')

socket.on('message', (event) => console.log(

socket.on('error', (event) => console.log(event))

socket.on('close', (event) => console.log(event))


The Net API provides Tcp emulation over RTCDataChannel

const { Net } = new Network()


Use the Net listen function to accept incoming sockets.

Net.listen({ port: 5000 }, async socket => {

  const data = await

  await socket.write(data)

  await socket.close()


Use the connect function to establish a Net connection to a remote listener.

const socket = await Net.connect({ hostname: 'localhost', port: 5000 })

await socket.write(new Uint8Array(1000))

const data = await // Uint8Array()

const end = await // null


The Media API provides functionality to send and receive MediaStream objects over WebRTC.

const { Media } = new Network()


Use the listen function to listen for incoming MediaStream

Media.listen({ port: 6000 }, (receiver) => {
  const video = document.createElement('video')
  video.srcObject = receiver.mediastream


  receiver.on('close', () => document.removeChild(video))


Use the send function to send a MediaStream to a listener

const sender = await Media.send({ hostname: 'localhost', port: 6000 }, new MediaStream([...]))

sender.close() // stop sending live media


Use the audio function to create a streamable AudioSource.

const audio ={ src: './audio.mp3' })

const sender = Media.send({ hostname: 'localhost', port: 6000 }, audio.mediastream)


Use the video function to create a streamable VideoSource.

const video ={ src: './video.mp4' })

const sender = Media.send({ hostname: 'localhost', port: 6000 }, video.mediastream)


Use the pattern function to generate a MediaStream test pattern. This function can be useful for testing live media streaming without web cameras or other media sources.

const pattern = Media.pattern()

const sender = Media.send({ port: 5000 }, pattern.mediastream)


Smoke provides a hierarchical file system able to store large files within the browser. The file system is backed by IndexedDB and has support for streaming read and write, directory enumeration, copy, move, rename as well as file and directory watch events. It is designed to act as a static file store for network services but can be used as a general purpose file system for applications needing to store large files in the browser.


Use the open function to open a file system with the given database name. If the database does not exist it is created.

import { FileSystem } from '@sinclair/smoke'

const Fs = await'<database-name>')


Use the stat function to return information about a file or directory.

const stat = await Fs.write('/path/file.txt')


Use the exists function to check a path exists.

const exists = await Fs.exists('/path/file.txt')


Use the mkdir function to recursively create a directory.

await Fs.mkdir('/media/videos')


Use the readdir function to return stat objects for the given directory path.

const stats = await Fs.readdir('/media/videos')


Use the blob function to return a Blob object to a file path.

const blob = await Fs.readdir('/video.mp4')

const url = URL.createObjectUrl(blob)


Use the write and writeText functions to write file content.

await Fs.write('/path/file.dat', new Uint8Array([1, 2, 3, 4]))

await Fs.writeText('/path/file.txt', 'hello world')


Use the read and readText functions will read content from a file.

const buffer = await'/path/file.dat')

const content = await Fs.readText('/path/file.txt')


Use the delete function to delete a file or directory.

await Fs.delete('/path/file.txt')


Use the rename function to rename a file or directory.

await Fs.writeText('/path/fileA.txt', '...')

await Fs.rename('/path/fileA.txt', 'fileB.txt')


Use the copy function to copy a file or directory into a target directory.

await Fs.writeText('/path/fileA.txt', '...')

await Fs.copy('/path/fileA.txt', '/backup')


Use the move function to move a file or directory into a target directory.

await Fs.writeText('/path/fileA.txt', '...')

await Fs.move('/path/fileA.txt', '/backup')


Use the watch function to watch for file and directory events.'/dir', event => console.log(event))


Smoke is open to community contribution. Please ensure you submit an open issue before submitting your pull request. The Smoke project prefers open community discussion before accepting new features.

Open Source Agenda is not affiliated with "Sinclairzx81 Smoke" Project. README Source: sinclairzx81/smoke
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