/
index.ts
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/
index.ts
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import type { Ref } from 'vue-demi'
import { ref } from 'vue-demi'
import type { Fn } from '@vueuse/shared'
import { tryOnScopeDispose, useIntervalFn } from '@vueuse/shared'
import { useEventListener } from '../useEventListener'
export type WebSocketStatus = 'OPEN' | 'CONNECTING' | 'CLOSED'
const DEFAULT_PING_MESSAGE = 'ping'
export interface UseWebSocketOptions {
onConnected?: (ws: WebSocket) => void
onDisconnected?: (ws: WebSocket, event: CloseEvent) => void
onError?: (ws: WebSocket, event: Event) => void
onMessage?: (ws: WebSocket, event: MessageEvent) => void
/**
* Send heartbeat for every x milliseconds passed
*
* @default false
*/
heartbeat?: boolean | {
/**
* Message for the heartbeat
*
* @default 'ping'
*/
message?: string | ArrayBuffer | Blob
/**
* Interval, in milliseconds
*
* @default 1000
*/
interval?: number
/**
* Heartbeat response timeout, in milliseconds
*
* @default 1000
*/
pongTimeout?: number
}
/**
* Enabled auto reconnect
*
* @default false
*/
autoReconnect?: boolean | {
/**
* Maximum retry times.
*
* Or you can pass a predicate function (which returns true if you want to retry).
*
* @default -1
*/
retries?: number | (() => boolean)
/**
* Delay for reconnect, in milliseconds
*
* @default 1000
*/
delay?: number
/**
* On maximum retry times reached.
*/
onFailed?: Fn
}
/**
* Automatically open a connection
*
* @default true
*/
immediate?: boolean
/**
* Automatically close a connection
*
* @default true
*/
autoClose?: boolean
/**
* List of one or more sub-protocol strings
*
* @default []
*/
protocols?: string[]
}
export interface UseWebSocketReturn<T> {
/**
* Reference to the latest data received via the websocket,
* can be watched to respond to incoming messages
*/
data: Ref<T | null>
/**
* The current websocket status, can be only one of:
* 'OPEN', 'CONNECTING', 'CLOSED'
*/
status: Ref<WebSocketStatus>
/**
* Closes the websocket connection gracefully.
*/
close: WebSocket['close']
/**
* Reopen the websocket connection.
* If there the current one is active, will close it before opening a new one.
*/
open: Fn
/**
* Sends data through the websocket connection.
*
* @param data
* @param useBuffer when the socket is not yet open, store the data into the buffer and sent them one connected. Default to true.
*/
send: (data: string | ArrayBuffer | Blob, useBuffer?: boolean) => boolean
/**
* Reference to the WebSocket instance.
*/
ws: Ref<WebSocket | undefined>
}
function resolveNestedOptions<T>(options: T | true): T {
if (options === true)
return {} as T
return options
}
/**
* Reactive WebSocket client.
*
* @see https://vueuse.org/useWebSocket
* @param url
*/
export function useWebSocket<Data = any>(
url: string,
options: UseWebSocketOptions = {},
): UseWebSocketReturn<Data> {
const {
onConnected,
onDisconnected,
onError,
onMessage,
immediate = true,
autoClose = true,
protocols = [],
} = options
const data: Ref<Data | null> = ref(null)
const status = ref<WebSocketStatus>('CLOSED')
const wsRef = ref<WebSocket | undefined>()
let heartbeatPause: Fn | undefined
let heartbeatResume: Fn | undefined
let explicitlyClosed = false
let retried = 0
let bufferedData: (string | ArrayBuffer | Blob)[] = []
let pongTimeoutWait: ReturnType<typeof setTimeout>
// Status code 1000 -> Normal Closure https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent/code
const close: WebSocket['close'] = (code = 1000, reason) => {
if (!wsRef.value)
return
explicitlyClosed = true
heartbeatPause?.()
wsRef.value.close(code, reason)
}
const _sendBuffer = () => {
if (bufferedData.length && wsRef.value && status.value === 'OPEN') {
for (const buffer of bufferedData)
wsRef.value.send(buffer)
bufferedData = []
}
}
const resetHeartbeat = () => {
clearTimeout(pongTimeoutWait)
}
const send = (data: string | ArrayBuffer | Blob, useBuffer = true) => {
if (!wsRef.value || status.value !== 'OPEN') {
if (useBuffer)
bufferedData.push(data)
return false
}
_sendBuffer()
wsRef.value.send(data)
return true
}
const _init = () => {
const ws = new WebSocket(url, protocols)
wsRef.value = ws
status.value = 'CONNECTING'
explicitlyClosed = false
ws.onopen = () => {
status.value = 'OPEN'
onConnected?.(ws!)
heartbeatResume?.()
_sendBuffer()
}
ws.onclose = (ev) => {
status.value = 'CLOSED'
wsRef.value = undefined
onDisconnected?.(ws, ev)
if (!explicitlyClosed && options.autoReconnect) {
const {
retries = -1,
delay = 1000,
onFailed,
} = resolveNestedOptions(options.autoReconnect)
retried += 1
if (typeof retries === 'number' && (retries < 0 || retried < retries))
setTimeout(_init, delay)
else if (typeof retries === 'function' && retries())
setTimeout(_init, delay)
else
onFailed?.()
}
}
ws.onerror = (e) => {
onError?.(ws!, e)
}
ws.onmessage = (e: MessageEvent) => {
resetHeartbeat()
// Heartbeat response will be skipped
if (options.heartbeat) {
const {
message = DEFAULT_PING_MESSAGE,
} = resolveNestedOptions(options.heartbeat)
if (e.data === message)
return
}
data.value = e.data
onMessage?.(ws!, e)
}
}
if (options.heartbeat) {
const {
message = DEFAULT_PING_MESSAGE,
interval = 1000,
pongTimeout = 1000,
} = resolveNestedOptions(options.heartbeat)
const { pause, resume } = useIntervalFn(
() => {
send(message, false)
pongTimeoutWait = setTimeout(() => {
// auto-reconnect will be trigger with ws.onclose()
close()
}, pongTimeout)
},
interval,
{ immediate: false },
)
heartbeatPause = pause
heartbeatResume = resume
}
if (immediate)
_init()
if (autoClose) {
useEventListener(window, 'beforeunload', () => close())
tryOnScopeDispose(close)
}
const open = () => {
close()
retried = 0
_init()
}
return {
data,
status,
close,
send,
open,
ws: wsRef,
}
}