I have deployed one node js project in which a http server is created at port 8080 and listening at 8080 and a service url is generated.But inside http.createServer i am creating another server for a nlp engine which is listening at port 8081.So using the service url generated after deployment i am able to hit server running at 8080,but how to access the nlp engine server running at 8081 using the same service url with out using router?ordo gcp doesnt allow creation of two server listening at two ports with the same service url?
Can you try http://hostname:8081? what does it say?
If the port 8081 is open, then ideally you should be able to access that NPL engine, else you may need to get the port open in GCP.
Related
Whenever I deploy my Hapi.js web application to azure, it starts the server using the socket protocol (see output below).
socket:\\.\pipe\b5c0af85-9393-4dcb-bd9a-3ba9b41ed6fb
GET /
GET /{param*}
GET /api/employees
POST /api/employees
GET /api/employees/{id}
PUT /api/employees/{id}
DELETE /api/employees/{id}
POST /api/worklog
GET /login
POST /login
Hapi server started # socket:\\.\pipe\b5c0af85-9393-4dcb-bd9a-3ba9b41ed6fb
150914/214730.270, [response], socket:\\.\pipe\b5c0af85-9393-4dcb-bd9a-3ba9b41ed6fb: [1;32mget[0m / {} [32m200[0m (316ms)
However, whenever I am running this locally, it starts using http... I have not run into this issue using express or loopback, only Hapi. Is there some sort of configuration that I am missing? This is the server.connection function:
var server = new Hapi.Server();
var host = process.env.host || '0.0.0.0';
var port = process.env.port || 3000;
server.connection({host: host, port: port});
The reason this is a big deal is because I cannot pass socket://*<mydoamin>* to google as a callback URI for OAuth.
You shouldn't need to pass socket://<domain> to google, you'd pass the normal https://yourDomain.com or even the https://yourSiteName.azurewebsites.net to Google for OAuth callback and it should work as you would expect.
The fact that the node application is listening on a pipe rather than a normal tcp socket is just an implementation detail of iisnode. Basically the problem is that node has it's own webserver so you can't use it with other webservers like IIS, Apache, nginx, etc. iisnode bridges the gap between IIS and node in that it allows IIS to listen to the HTTP port on the machine 80 and when IIS gets a request on that port, it just forwards it to the node process that's listening on a named pipe. This allows you to manage your sites in IIS as you normally would on a Windows Server machine, while actually writing your app in node.
You can think of it as 2 webservers running on the box, one (IIS) is acting as a proxy for the other (node) where all the work is actually happening. The fact that the iisnode developer chose to use a named pipe instead of a normal tcp socket is odd (though kind of understandable since you can't easily reserve a port per se as you can a pipe), but it's the way it is.
I've successfully made a test chat app and I've gotten a node js server with socket.io running on heroku. On my local computer I have to specify the port number of localhost on the client side to the port that the server has set up. However, when I run my server code on heroku. Removing the server
I'm using the process.env.PORT variable since heroku sets that up:
var port = process.env.PORT || 3000;
http.listen(port, function(){
console.log('listening on *:' + port);
});
Naturally I find the port number that the app is running on place it in the url
var socket = io('https://xxxx.herokuapp.com:1111');
However this gives me an "net::ERR_CONNECTION_REFUSED".
I got it to work by removing the port nubmer after the url (in this example :1111). I'm wondering why this is working since most of the tutorials and articles online have it specifying the port and why my local computer needs the port to work as well.
When you connect to your https://xxxx.herokuapp.com subdomain on heroku on port 443 (which is the port that is used for an https connection when no port is specified), Heroku is probably using a proxy or router to route that incoming connection to the particular port that your node.js server is listening to. In the Heroku infrastructure, they know what actual internal host your server is running on and what actual port number it is running on so they can map a default port request on your subdomain to the actual port/host.
This is done so that browsers can connect to your subdomain directly on the default port without having to know the particulars of your node server installation and so that Heroku can auto-manage your server and likely share hardware with other customers. You are each running on a different port, but sharing the same machine. The ports are managed entirely by Heroku and this is one way that they are able to put multiple customers on the same hardware without each having to specify a custom port in the browser URL (which would be a non-starter for most customers).
So, Heroku is hosting some sort of proxy for your sub-domain that is listening to the default https port. Thus, you don't have to specify the port in the URL. Internally, they route that connection to your actual port on your actual server.
When running on your desktop, there is no such proxy to do this for you so you have to make sure client and server port numbers match.
I locally wrote a nodeJS app using socket.io and express modules.
I wanted to use openshift for hosting.
So I changed the main .js to server.js which seems to be the index equivalent of the openshift file and changed the server port setting to:
var server = require('http').createServer(app).listen(process.env.OPENSHIFT_NODEJS_PORT || 3000);
as indicated in some posts.
However after git commit, I am still getting:
remote: info: socket.io started
remote: warn: error raised: Error: listen EACCES
remote: DEBUG: Program node server.js exited with code 0
remote:
remote: DEBUG: Starting child process with 'node server.js'
and the website doesn't work.
As the app is serving a html file, there are two more places, where the port is mentioned, which sit in the index.html that is served:
header:
<script src='//localhost:3000/socket.io/socket.io.js'></script>
and within javascript for the html file:
var socket = io.connect('//localhost:'+process.env.OPENSHIFT_NODEJS_PORT || 3000);
// intial vars and multi list from server
socket.on('clientConfig', onClientConfig);
All files and modules are seemingly uploaded, but the EACCES error still prevails.
I get the feeling that maybe the header link to localhost:3000 might be the skipping point, but I am not sure. Anyone have any idea, what the problem is?
Also, there is no : socket.io/socket.io.js file in the socket.io modules folder, which I find confusing.
I had recently developed a chat client application using socket.io and also had webrtc in it. I was able to deploy the app on openshift by making the following changes into code.
Client Side
Keep the include script tag in a relative manner like so
<script src="/socket.io/socket.io.js"></script>
While declaring io.connection, change the ip part to point the application to server in this format.
var socket = io.connect('http://yourapp-domain.rhcloud.com:8000/', {'forceNew':true });
8000 is for http and 8443 is for https
Server Side
The io and the server should both be listening on the same port and the order in which the statements are run should also be given attention.
Step 1: Declare the http server using app.
( app is obtained from express)
var express = require('express');var app = express();)
var server = require('http').Server(app);
Step 2:
Declare io from socket.io and combine it with the server object.
var io = require('socket.io').listen(server);
Step 3:
Now, allow the server to listen to openshift port and ip.
server.listen(process.env.OPENSHIFT_NODEJS_PORT, process.env.OPENSHIFT_NODEJS_IP);
Please pay special attention to the order of the statements you write, it is the order which causes issues.
The server side of your websocket needs to listen on port 8080 on your openshift ip address, the CLIENT side needs to connect to your ws://app-domain.rhcloud.com:8000
I have a few notes on how to use WebSockets here: https://www.openshift.com/blogs/10-reasons-openshift-is-the-best-place-to-host-your-nodejs-app#websockets
You don't need any additional server-side changes after adapting your code to take advantage of environment variables (when available)
OpenShift's routing layer exposes your application on several externally-accessible ports: 80, 443, 8000, 8443.
Ports 8000 and 8443 are both capable of handling websocket connection upgrades. We're hoping to add support for WebSocket connections over ports 80 and 443 soon.
I am working with nodejs, expressjs, and socket.io I am triggering events on my web app with a mobile phone over the nodejs server.
The app is built on javascript but I am using laravel to store data into a database. I am new to nodejs so I am pretty sure if I wanted, I think I could cut out php and just use the whole app with nodejs, but I don't want to. I like laravel and php and it's alread setup, so let me explain my problem.
laravel is installed on my server http://example.com/public/ laravel's index.php is here. My routes for my data base resources are http://example.com/public/feeds. I can access this fine, but if I want to access my nodejs server I need to use http://example.com:3000 which obviously causes a problem.
The nodejs/expressjs files are inside http://example.com/public/MY-FILES-HERE but since the nodejs dispatches on http://example.com:3000 this throws my laravel routes off.
So what I am asking is how do I get it all to work well with eachother? I assume I need to setup a port somehow in laravel.
EDIT: So I am new to the port, and I didnt know there is already a default port set (80). My laravel install is on port 80, and inside here I can listen to calls from port 3000 using socket.io. I did not know that, so I have a page http://my-server-ip:3000/test which has one button and a script that sends the event to the nodejs server and that responds to my script which listens to events on port 3000 and executes a function. Cool stuff here, I hope I made sense I am very new.
Not quite sure what you mean by
this throws my laravel routes off
In a situation where you want to host multiple servers on port 80 from the same machine you might want to consider a reverse proxy. I recommend nginx for this.(http://www.cyberciti.biz/tips/using-nginx-as-reverse-proxy.html). Nginx will listen to port 80.
Then you setup a subdomain eg. node.example.com for the node.js service.
In the reverse proxy you listen for node.example.com on port 80 and direct that to port 3000. You set up Laravel/Apache? to listen on port 4000 and have nginx listen for www.example.com on port 80 and direct that to port 4000.
Is this what you are after?
I'm trying to get a nodejs socket server running that will allow remote communication between two clients running a Flash game that communicates using a custom protocol. Due to Flash security restrictions, it seems that the socket server must be running on the same host as the web server that servers the Flash game. I've been continuously getting the following error:
The service crashed at startup or is listening to the wrong port. It failed to respond on port "nodejs" (8080) within 30 seconds
What I need is a way to run my nodeJS server code, while simultaneously serve the flash files.
I'm using the environment JSON variables to determine what port to listen on, and my YML is similar to the one discussed here but no luck...
Just wondering if I can get some info on how to create a working socket server/web server that will work for this (or if it is actually possible)
You can use the following dotcloud.yml file:
www:
type: nodejs
ports:
mything: tcp
Then in your Node.js app, you can bind a HTTP server to port 8080, and an arbitrary TCP server to the port contained by environment variable $PORT_MYTHING. Then run dotcloud info on your service; in the ports section, you will see something like this:
- name: mything
url: tcp://myapp-johndoe.dotcloud.com:12345
From now on, if you connect to myapp-johndoe.dotcloud.com on port 12345, you will actually connect to $PORT_MYTHING in your application.
I hope that it makes sense, and that it is what you were looking for!