在WebSocket (ws)上接收一个ArrayBuffer

Question

我想处理使用ws从客户端收到的ArrayBuffer消息。在客户端，由于ws，我直接接收一个ArrayBuffer。binaryType，但服务器端，我没有收到一个ArrayBuffer，但像这样的东西(字符串?):'<缓冲区00 _x0030_0=" _x0032_a=">'。

服务器如何接收一个ArrayBuffer ?

客户端:

var ws = new WebSocket("ws://localhost:3000/");
ws.binaryType = 'arraybuffer';
ws.onopen = function() {
    var buffer = new ArrayBuffer(15);
    var dv = new DataView(buffer);
    dv.setInt16(1, 42);
    ws.send(buffer);
};

服务器端:

var express = require('express'),
app = express(),
server = require('http').createServer(),
WebSocketServer = require('ws').Server,
wss = new WebSocketServer({
    server: server
});
...
wss.on('connection', function(socket) {
    console.log(message);
    //log : <Buffer 00 00 2a 00 00 00 00 00 00 00 00 00 00 00 00 00>

    socket.on('message', function(message) {
        //would like to read and handle the arraybuffer properly
    });
});

Answer 1

只需将Buffer转换为ArrayBuffer

var buf = new Uint8Array(message).buffer;
var dv = new DataView(buf);