从 Firefox 插件打开 TCP 套接字

Question

恐怕我无法从 Firefox 插件打开套接字。我的目标是让我的插件在端口上监听，Python 脚本会不时向它发送一个短字符串以执行操作。

我已经检查并且没有防火墙在运行，如果我在启动这个插件之前将 netcat 设置为监听我想要的端口，它的行为会有所不同（它会打印“打开的端口！”）。不幸的是，我真的想让插件成为监听器/服务器。

//TCPSocket API: https://developer.mozilla.org/en-US/docs/Web/API/TCPSocket
//Got me started: http://stackoverflow.com/q/28326301
const {Cu,Cc,Ci} = require("chrome");
var tcpSocket = Cc["@mozilla.org/tcp-socket;1"].createInstance(Ci.nsIDOMTCPSocket);
var socket = tcpSocket.open("127.0.0.1", 64515);
socket.ondata = function (event) {
    console.log('port received data!!!');
    if (typeof event.data === 'string') {
        console.log('Got: ' + event.data);
    }
}
socket.onopen = function() {console.log('opened port!');}
socket.onerror = function(event) {
    console.log('port error!');
    console.log(event.data)
}
socket.onclose = function() {console.log('port closed!');}
socket.ondrain = function() {console.log('port drained!');}

现在虽然直接输出是：

console.log: my-addon: port error!
console.log: my-addon: DOMError {}
console.log: my-addon: port closed!

其中“DOMError”是 socket.onerror 收到的错误。

我不确定这是否是我对套接字缺乏了解，或者在打开端口时是否与 Firefox 插件和权限有关。

Answer 1

我是你提到的问题的 OP (TcpSocket listen on Firefox addon)，我终于用不同的方法解决了它：

var port = 3000; //whatever is your port
const {Cc, Ci} = require("chrome");
var serverSocket = Cc["@mozilla.org/network/server-socket;1"].createInstance(Ci.nsIServerSocket);
serverSocket.init(port, true, -1);
var listener = {
    onSocketAccepted: function(socket, transport) {
        var input = transport.openInputStream(Ci.nsITransport.OPEN_BLOCKING,0,0);
        var output = transport.openOutputStream(Ci.nsITransport.OPEN_BLOCKING, 0, 0);
        var tm = Cc["@mozilla.org/thread-manager;1"].getService();
        input.asyncWait({
            onInputStreamReady: function(inp) {
                try
                {
                    var sin = Cc["@mozilla.org/scriptableinputstream;1"].createInstance(Ci.nsIScriptableInputStream);
                    sin.init(inp);
                    sin.available();

                    //Get request message
                    var request = '';
                    while (sin.available()) { request = request + sin.read(5120); }
                    var reqObj = { type: null, info: [] };
                    if(request != null && request.trim() != "") {
                        console.log(request);
                    }
                }
                catch(ex) { }           
                finally
                {
                    sin.close();
                    input.close();
                    output.close();
                }
            }
        }, 0, 0, tm.mainThread);
    },
    onStopListening: function(socket, status) {
    }
};
serverSocket.asyncListen(listener);