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wspromisify
Advanced tools
Wraps your WebSockets into Promise-based class with full d.ts typings on client & server
A nice-looking this readme version: https://houd1ni.github.io/WebsocketPromisify/
Makes websocket's API just like REST with Promise-like API, with native Promises. Has a lot of yummies and very lightweight (less than 3kb in gzip)!
const responseData = await ws.send({catSaid: 'Meow!'})
// If you detected some bug, want some stuff to be added, feel free to open an issue! Large data support (chunking), plugins, streams and different server-side implementations are coming. To see a Node.js server-side part example, please, take a look on test/mock in github repo.
Makes a Promise-like WebSocket connection. Features (almost all are tunable via constructor config below.)
socket
property.How it on Server Side ?
1. Serialized JSON is sent by this lib = {id: 'generated_id', data: your data}
... or some entity from your .encode function(message_id, message_data)
2. Some Server processing...
3. Serialized JSON is sent back by the Server = {id: 'the same generated_id', data: feedback data}
... or some entity that could be parsed by your .decode function(raw_data)
Default constructor config is
{
// You can also use plain text and blobs in future.
data_type: 'json',
// Debug features. Not required.
log: ((event, time, message) => null),
// Will count milliseconds for responses and put them to log function above.
timer: false,
// Set up.
// Required. URL to connect without a protocol.
// Can start with /, then current page host and port will be used.
url: 'localhost',
// Timeout after sending a message before it drops with error.
timeout: 1400,
// Reconnect timeout in seconds or null.
reconnect: 2,
// Lazy connect: connects only if something sent (then sends all of them!)
lazy: false,
// Existing socket if you already have one to augment with this force.
socket: null,
// You can set your own middleware here.
adapter: ((host, protocols) => new WebSocket(host, protocols)),
// You can replace original serialisation to your own or even binary stuff.
encode: (message_id, message_data, config) => data,
// You can replace original deserialisation to your own or even
// making the message object from binary data.
// id_key and data_key could be taken from the config argument.
decode: (raw_message) => { message_id, message_data },
// WebSocket constructor's protocol field.
protocols: [],
// Unique id's and data keys to negotiate with back-end.
server: {
id_key: 'id',
data_key: 'data'
},
// Pings to avoid interruptions. null to disable.
ping: {
interval: 55, // seconds.
content: {} // goes to `data` => { id, data: {} } by default.
}
}
Fields/Props:
// read-only, returns WebSocket (or so) instance to use with other stuff.
socket
Methods:
// Returns Promise that connection is open. Works even if it already opened.
ready()
// sends any type of message and returns a Promise.
send(message),
// .addEventListener with optional predicate that works after reconnections.
on(event_name, handler, predicate = (WebSocketEvent) => true),
// Closes the connection and free up memory. Returns Promise that it has been done.
close()
Example:
import WSP from 'wspromisify' // or const WSP = require('wspromisify') in Node.
const somehost = 'example.com:8080'
const someFunction = async () => {
const ws = new WSP({
// If url starts with /,
// it results in ws(s if in https)://currentHost:currentPort/thisUrl
url: 'ws://example.com/ws',
timeout: 2e3, // 1400ms by default.
timer: true, // false by default.
// To log data trips. Events: open, close, send, reconnect, error.
// If timer isn't enabled, the signature is log(event, message)
log(event, time, message = '') {
if(time !== null) {
console.log(event, `in ${time}ms`, message)
} else {
console.log(event, message)
}
}
})
try {
// You can wait for ready by calling await ws.ready() or send it right now:
// the messages will be sent as soon as the connection is opened.
const data = await ws.send({catSaid: 'Meow!'})
console.log({data})
} catch(error) {
console.error('Cannot send a message due to ', error)
}
}
someFunction()
FAQs
Wraps your WebSockets into Promise-based class with full d.ts typings on client & server
The npm package wspromisify receives a total of 110 weekly downloads. As such, wspromisify popularity was classified as not popular.
We found that wspromisify demonstrated a healthy version release cadence and project activity because the last version was released less than 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.
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