如何在Chrome应用程序上使用Javascript通过UDP发送字符串

我正在编写一个chrome应用程序，我想通过UDP向某个服务器发送一些字符串。我是javascript新手，有点被卡住了。这是一段代码：

var wholeString = "what is the meaning of life";            

chrome.sockets.udp.create({}, function (socketInfo) {
    // The socket is created, now we can send some data
    var socketId = socketInfo['socketId'];
    var arrayBuffer = stringToArrayBuffer("hello");
    chrome.sockets.udp.bind(socketId, "127.0.0.1", 0, function (result) {
        chrome.sockets.udp.send(socketId, stringToArrayBuffer(wholeString), "127.0.0.1", 3050, function (sendInfo) {
            console.log("sent " + sendInfo.bytesSent);
            if (sendInfo.resultCode < 0) {
                console.log("Error listening: " + chrome.runtime.lastError.message);
            }
        });
    });
});

我收到的错误消息是：

Error in response to sockets.udp.bind: Error: Invocation of form sockets.udp.send(integer, integer, string, integer, function) doesn't match definition sockets.udp.send(integer socketId, binary data, string address, integer port, function callback)
    at Object.callback (chrome-extension://pmkjeflkfhfekliappbhemngaejmnbec/helper.js:45:24)
    at Object.callback (chrome-extension://pmkjeflkfhfekliappbhemngaejmnbec/helper.js:42:23)

---

我以为函数会把我的字符串改成字节数组？有什么问题吗？

您的

stringToArrayBuffer

函数中有一个小错误

function stringToArrayBuffer(string) {
    var arrayBuffer = new ArrayBuffer(string.length * 2);
    var buffer = new Uint8Array(arrayBuffer);
    for (var i = 0, stringLength = string.length; i < stringLength; i++) {
        buffer[i] = string.charCodeAt(i);
        // Was: buffer = string.charCodeAt(i);
    }
    return buffer;
}

函数stringToArrayBuffer（字符串）{
var arrayBuffer=新的arrayBuffer（string.length*2）；
var buffer=新的Uint8Array（arrayBuffer）；
对于（var i=0，stringLength=string.length；i

因此，您只使用一个整数值覆盖二进制数组

但我不确定这是唯一的问题。为什么要使用

Uint8

而不是

Uint16

？请参阅Chrome文档中的链接

function stringToArrayBuffer(string) {
    var arrayBuffer = new ArrayBuffer(string.length * 2);
    var buffer = new Uint8Array(arrayBuffer);
    for (var i = 0, stringLength = string.length; i < stringLength; i++) {
        buffer[i] = string.charCodeAt(i);
        // Was: buffer = string.charCodeAt(i);
    }
    return buffer;
}