<Buffer 01 00 01 ff ff 67 1e 2f 75 72 69 2f 66 6f 6f>

buffer = new ArrayBuffer(5)
header = new Uint8Array(buffer)
header[0] = 0x01
header[1] = 0x00
header[2] = 0x01
header[3] = 0xff
header[4] = 0xff
// later
socket.write(new TextDecoder("utf-8").decode(header) +  'gx1e/uri/foo')
// results in this buffer service side from the accepting socket
<Buffer 01 00 01 ef bf bd ef bf bd 67 1e 2f 75 72 69 2f 66 6f 6f>

socket.write('x01x00x01xffxffgx1e/uri/foo')
// service sees the following
<Buffer 01 00 01 c3 bf c3 bf 67 1e 2f 75 72 69 2f 66 6f 6f>

const net = require('net')
net.createServer((socket) => {
    socket.on('data',(raw) => {
        console.log(raw)
    })
}).listen(5000)