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websocket: avoid using Buffer.byteLength #3394

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merged 2 commits into from
Jul 7, 2024
Merged

websocket: avoid using Buffer.byteLength #3394

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d58078c
websocket: avoid using Buffer.byteLength
tsctx Jul 6, 2024
8fb8f0f
rename sendHints.string to sendHints.text
tsctx Jul 7, 2024
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2 changes: 1 addition & 1 deletion lib/web/websocket/constants.js
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ const parserStates = {
const emptyBuffer = Buffer.allocUnsafe(0)

const sendHints = {
string: 1,
text: 1,
typedArray: 2,
arrayBuffer: 3,
blob: 4
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14 changes: 5 additions & 9 deletions lib/web/websocket/sender.js
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Expand Up @@ -4,9 +4,6 @@ const { WebsocketFrameSend } = require('./frame')
const { opcodes, sendHints } = require('./constants')
const FixedQueue = require('../../dispatcher/fixed-queue')

/** @type {typeof Uint8Array} */
const FastBuffer = Buffer[Symbol.species]

/**
* @typedef {object} SendQueueNode
* @property {Promise<void> | null} promise
Expand Down Expand Up @@ -86,18 +83,17 @@ class SendQueue {
}

function createFrame (data, hint) {
return new WebsocketFrameSend(toBuffer(data, hint)).createFrame(hint === sendHints.string ? opcodes.TEXT : opcodes.BINARY)
return new WebsocketFrameSend(toBuffer(data, hint)).createFrame(hint === sendHints.text ? opcodes.TEXT : opcodes.BINARY)
}

function toBuffer (data, hint) {
switch (hint) {
case sendHints.string:
return Buffer.from(data)
case sendHints.text:
case sendHints.typedArray:
return new Uint8Array(data.buffer, data.byteOffset, data.byteLength)
case sendHints.arrayBuffer:
case sendHints.blob:
return new FastBuffer(data)
case sendHints.typedArray:
return new FastBuffer(data.buffer, data.byteOffset, data.byteLength)
return new Uint8Array(data)
}
}

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10 changes: 5 additions & 5 deletions lib/web/websocket/websocket.js
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Original file line number Diff line number Diff line change
Expand Up @@ -234,12 +234,12 @@ class WebSocket extends EventTarget {
// the bufferedAmount attribute by the number of bytes needed to
// express the argument as UTF-8.

const length = Buffer.byteLength(data)
const buffer = Buffer.from(data)

this.#bufferedAmount += length
this.#sendQueue.add(data, () => {
this.#bufferedAmount -= length
}, sendHints.string)
this.#bufferedAmount += buffer.byteLength
this.#sendQueue.add(buffer, () => {
this.#bufferedAmount -= buffer.byteLength
}, sendHints.text)
} else if (types.isArrayBuffer(data)) {
// If the WebSocket connection is established, and the WebSocket
// closing handshake has not yet started, then the user agent must
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