RangeError:无效的状态代码:0,NodeJS ZeroMQ

时间:2017-03-13 22:38:04

标签: javascript node.js websocket zeromq

我正在开发一个简单的节点api / server,它使用websockets,特别是ZeroMQ。但是,在发送/请求数据时,我收到以下错误:

RangeError:无效的状态代码:0在ServerResponse.writeHead(_http_server.js:192:11)

   var express = require('express');
var app = express();
var bodyParser = require("body-parser");
var server_port = "3000";

/** app settings **/
var zeromq = require("zeromq");
var socket = zeromq.socket("req");/* sends request */
var protocol = "tcp://";
var ip = "192.000.0.000"; //server
var socket_port = "9998";
var url = protocol + ip + ":" + socket_port;


app.use(bodyParser());

/** paths **/
app.post('/request', function (request, response) {
    var command = request.body;

    //connect to port
    socket.connect(url, function (error) {
        if (error) {
            console.log("connection error : ", error);
            process.exit(0);
        }
    });

    //response to front end
    socket.send(JSON.stringify(command));

    //recieve request
    socket.on('message', function (message) {

        //output message to console
        console.log("Recieved message @ : " + (new Date().toDateString()) + " : " + message.toString());

        //send response
        response.setHeader('Content-Type', 'text/plain');
        response.setHeader('Access-Control-Allow-Origin', 'http://localhost:8888');
        response.status(200).send(message);
    });

});


/** start app **/
app.listen(server_port);

console.log("Server started on port: " + server_port);

代码更新: 现在我得到了:

错误:发送后无法设置标头。 在ServerResponse.OutgoingMessage.setHeader(_http_outgoing.js:356:11)

1 个答案:

答案 0 :(得分:1)

我猜你正在发送状态0.尝试使用

CREATE INDEX ON :M(Name);