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librpc-web-mod
Advanced tools
Promise-based RPC client and server for web workers (forked from @librpc/web)
Forked from https://github.com/librpc/web to add transferrables and serialized-error
npm install --save librpc-web-mod
// server.js
import { Server as RpcServer } from 'librpc-web-mod'
function wait(time) {
return new Promise(resolve => setTimeout(resolve, time))
}
self.rpcServer = new RpcServer({
add({ x, y }) {
return x + y
},
task() {
return wait(1000)
},
error() {
return err
},
transfer(buffer) {
return { buffer }
},
})
// client.js
import { Client as RpcClient } from 'librpc-web-mod'
var worker = new window.Worker('server.js')
var rpcClient = new RpcClient({ workers: [worker] })
rpcClient.call('add', { x: 1, y: 1 }).then(res => console.log(res)) // 2
rpcClient.call('length').catch(err => console.log(err)) // Unknown RPC method "length"
rpcClient.call('task', null, { timeout: 100 }).catch(err => console.log(err)) // Timeout exceeded for RPC method "task"
rpcClient.call('error').catch(err => console.log(err)) // ReferenceError: err is not defined
rpcClient
.call('transfer', new ArrayBuffer(0xff))
.then(res => console.log(res.buffer)) // ArrayBuffer(255)
#constructor(methods: { [string]: (*) => Promise<*> | * })
var server = new RpcServer({
add({ x, y }) {
return x + y
},
sub({ x, y }) {
return x - y
},
mul({ x, y }) {
return x * y
},
div({ x, y }) {
return x / y
},
pow({ x, y }) {
return x ** y
},
})
Every passed method becomes remote procedure. It can return Promise if it is needed. Only ArrayBuffers will be transferred automatically (not TypedArrays). Errors thrown by procedures would be handled by server.
#emit(eventName: string, data: *)
setInterval(() => {
server.emit('update', Date.now())
}, 50)
Trigger server event.
Note: contents of data is recursively inspected for Transferable objects. For large data, this can sometimes be intensive, so if an object contains an attribute containsNoTransferables
that is set to true
, transferable inspection (the peekTransferables
function) will skip that object.
#constructor(options: { workers: Array<Worker> })
var worker = new window.Worker('server.js')
var client = new RpcClient({ workers: [worker] })
Client could be connected to several workers for better CPU utilization. Requests are sent to an exact worker by round robin algorithm.
#call(method: string, data: *, { timeout = 2000 } = {}): Promise<*>
client.call('pow', { x: 2, y: 10 }).then(result => console.log(result))
Remote procedure call. Only ArrayBuffers will be transferred automatically (not TypedArrays).
Error would be thrown, if:
timeout
#on(eventName: string, listener: (*) => void)
function listener(data) {
console.log(data)
}
client.on('update', listener)
Start listen to server events.
#off(eventName: string, listener: (*) => void)
client.off('update', listener)
Stop listen to server events.
FAQs
Promise-based RPC client and server for web workers (forked from @librpc/web)
The npm package librpc-web-mod receives a total of 606 weekly downloads. As such, librpc-web-mod popularity was classified as not popular.
We found that librpc-web-mod demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
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