I was trying to run a MQTT server in nodejs on Ubuntu 14.04 LTS
var mosca = require('mosca')
var settings = {
port: 1883,
persistence: mosca.persistence.Memory
};
var server = new mosca.Server(settings, function() {
console.log('Mosca server is up and running')
});
server.published = function(packet, client, cb) {
if (packet.topic.indexOf('echo') === 0) {
return cb();
}
var newPacket = {
topic: 'echo/' + packet.topic,
payload: packet.payload,
retain: packet.retain,
qos: packet.qos
};
console.log('newPacket', newPacket);
server.publish(newPacket, cb);
}
it is throwing following error:
/home/ubuntu/node_modules/mosca/node_modules/qlobber/lib/qlobber.js:227
for (w of st.keys())
^^ SyntaxError: Unexpected identifier
at Module._compile (module.js:439:25)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object.<anonymous> (/home/ubuntu/node_modules/mosca/node_modules/qlobber/index.js:3:18)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
Can anyone help what is that I am doing wrong?
of is a keyword in the newer ECMAScript spec, so it appears that the qlobber module used by mosca requires something newer than nodejs 0.10.x
Related
Im developing a nodejs application that needs to register to the AWS service discovery on the app start. I'm using the #aws-sdk/client-servicediscovery lib in my node application. As a reference, I am using the code from here: https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-servicediscovery/index.html.
const { ServiceDiscoveryClient, CreateHttpNamespaceCommand } = require("#aws-sdk/client-servicediscovery");
const client = new ServiceDiscoveryClient({ region: "xxx" });
const params = {
"ServiceId":"xxx",
"InstanceId":"xxx",
"CreatorRequestId":new Date(new Date().toUTCString()),
"Attributes": {
AWS_INSTANCE_IPV4: "xxx.xx.xx.xx",
AWS_INSTANCE_PORT: xxx,
service: "xxx",
}
};
const command = new CreateHttpNamespaceCommand(params);
client.send(command).then(
(data) => {
console.log(data)
},
(error) => {
console.log(error)
}
);
While running the app, getting these errors.
/application/node_modules/#aws-sdk/shared-ini-file-loader/dist-cjs/slurpFile.js:5
const { readFile } = fs_1.promises;
^
TypeError: Cannot destructure property `readFile` of 'undefined' or 'null'.
at Object.<anonymous> (/application/node_modules/#aws-sdk/shared-ini-file-loader/dist-cjs/slurpFile.js:5:27)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Module.require (module.js:596:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/application/node_modules/#aws-sdk/shared-ini-file-loader/dist-cjs/loadSharedConfigFiles.js:8:21)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)
at Module.require (module.js:596:17)
at require (internal/module.js:11:18)
I am new to the AWS SD so need some help registering my service to the service discovery. Thanks in advance!
I am trying to run following code===>
var webdriverio = require('webdriverio');
var options = { desiredCapabilities: { browserName: 'chrome' } };
var client = webdriverio.remote(options);
client
.init()
.url('http://www.webdriveruniversity.com/')
.click('#login-portal')
.getTitle().then(function(title) {
console.log('Title is: ' + title);
})
.end();
The output I am getting as follows. Not sure how to solve it.
const remote = async function (params = {}, remoteModifier) {
^^^^^^^^
SyntaxError: Unexpected token function
at createScript (vm.js:56:10)
at Object.runInThisContext (vm.js:97:10)
at Module._compile (module.js:542:28)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (C:\Users\user\Desktop\webdriverFramework\loginPortal
Test.js:1:81)
It seems you are trying to use a library that uses async functions with an old Node.js version that does not support them. Please, run node -v and compare the Node.js version with the async functions support table.
I'm trying to create a chat module using socket.io. Ideally I would like to pass the port number like this:
var anotherChatApp = require("anotherChatApp")(1337);
the problem I'm having is finding the object after I've set the listen() method.
var io = require("socket.io");
function anotherChatApp(port){
io.listen(port);
}
then I don't know where it goes, because I try to access the io object:
io.sockets.on('connection', function (socket) {
//dosomething
}
and I get runtime errors:
Cannot call method 'on' of undefined
I was loving node until I started building a module.
EDIT:
var io = require("socket.io");
function MacroChat(portNo){
io = require("socket.io").listen(portNo);
}
module.exports = MacroChat;
//here is where the errors come in
io.sockets.on('connection', function (socket){
});
And the error:
TypeError: Cannot read property 'sockets' of undefined
at Object.<anonymous> (D:\wamp\www\nodejitsu\macrochat\node_modules\MacroChat\lib\macrochat.js:10:3)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object.<anonymous> (D:\wamp\www\nodejitsu\macrochat\node_modules\MacroChat\index.js:5:18)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
I have node.js successfully installed. I have created the file
var http = require('http');
var url=require('url');
var fs=require('fs');
var io = require('socket.io');
http.createServer(function (req, res) {
fs.readFile('/var/www/nodeJS/client.html' ,
function ( err, data ) {
if ( err ) {
console.log( err );
res.writeHead(500);
return res.end( 'Error loading client.html' );
}
res.writeHead( 200 );
res.end( data );
});
}).listen(8124, '127.0.0.1');
io.listen(http);
io.sockets.on('connection', function (socket) {
socket.emit('news', { hello: 'world' });
socket.on('my other event', function (data) {
console.log(data);
});
});
The error occurs whenever I use the io object. Without io it works fine.
Error: Cannot find module 'zeparser'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object.<anonymous> (/var/www/nodeJS/node_modules/socket.io/node_modules/socket.io-client/node_modules/active-x-obfuscator/index.js:1:78)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
After this I have also separately installed module zeparser. My default npm installation directory seems to be /usr/local/lib/node_modules.
I have set NODE_PATH as
export NODE_PATH="/usr/local/lib/node_modules"
but get the same error.
Then I tried to copy zeparser module to /var/www/nodeJS/node_modules. Then the error changes to
/var/www/nodeJS/node_modules/socket.io/lib/manager.js:104
server.on('error', function(err) {
^
TypeError: Object #<Object> has no method 'on'
at new Manager (/var/www/nodeJS/node_modules/socket.io/lib/manager.js:104:10)
at Object.exports.listen (/var/www/nodeJS/node_modules/socket.io/lib/socket.io.js:78:10)
at Object.<anonymous> (/var/www/nodeJS/app.js:35:4)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:903:3
On your root project, do:
$ sudo npm install zeparser
It resolved the problem for me.
I followed this tutorial to install the node.js on ubuntu and installation is successful. But when i type node echo-server.js i am getting following error:
module.js:340
throw err;
^
Error: Cannot find module '../../lib/ws/server'
at Function.Module._resolveFilename (module.js:338:15)
at Function.Module._load (module.js:280:25)
at Module.require (module.js:362:17)
at require (module.js:378:17)
at Object.<anonymous> (/home/jci/node/joyent-node-283d735/echo-server.js:2:10)
at Module._compile (module.js:449:26)
at Object.Module._extensions..js (module.js:467:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.runMain (module.js:487:10)
echo server code:
var sys = require("util")
, ws = require('../../lib/ws/server');
var server = ws.createServer({debug: true});
// Handle WebSocket Requests
server.addListener("connection", function(conn){
conn.send("Connection: "+conn.id);
conn.addListener("message", function(message){
conn.send("<"+conn.id+"> "+message);
if(message == "error"){
conn.emit("error", "test");
}
});
});
server.addListener("error", function(){
console.log(Array.prototype.join.call(arguments, ", "));
});
server.addListener("disconnected", function(conn){
server.broadcast("<"+conn.id+"> disconnected");
});
server.listen(8000);
But lib/ws/server is missing. But where do i get it from??
I don't have web socket server in my node.js installation i guess.
Thanks
Sneha