从Firefox插件打开TCP套接字

Question

我担心我的Firefox插件打开套接字时遇到问题.我的目标是让我的插件监听端口,Python脚本会偶尔发送一个短字符串来进行操作.

我已经检查过并且没有防火墙正在运行,如果我在启动这个插件之前设置netcat来监听我想要的端口,它的行为会有所不同(它将打印"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!');}

现在虽然立即输出是:

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缺乏理解套接字,或者在打开端口时是否有与Firefox插件和权限有关的特殊内容.

Answer 1

我是你提到的问题的OP(TcpSocket在Firefox插件上听),我终于让它采用了不同的方法:

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);