Trying to get the simplest node server interacting with the browser, with this:
var http = require('http');
http.createServer(function(req, res){
res.writeHead( 200, { "content-Type" : 'text/plain' } )
res.send('Hello world');
}).listen(1337, '192.168.1.2');
but localhost won't do it..
localhost refused to connect
Thats the IPv4 address. Am I missing something here?
Use 0.0.0.0 and it will work both '192.168.1.2' and localhost.
I suspect you are on a Mac. First change 192.168.1.2 to 127.0.0.1, or 0.0.0.0 if you want to be accessible from other computers.
Next browse to http://127.0.0.1:1337/, not http://localhost:1337/. For whatever reason localhost resolves to ::1 - an IPv6 address on my Mac. For some reason Node immediately disconnects any IPv6 connections on my machine.
Had the same problem and solved it like this:
var http = require('http');
http.createServer(function(req, res){
res.writeHead( 200, { "content-Type" : 'text/plain' } )
res.end('Hello world');
}).listen(1337);
On node Terminal: node filename.js
Leave it open, don't CTRL + C.
Go to webpage: localhost:1337
It should work. The problem is not closing the terminal or exiting the execution of the node File.
I think you have just a typo, use res.end to send data back and close the connection instead of res.send.
Also, you shouldn't have any problem to connect to localhost
var http = require('http');
http.createServer(function(req, res){
res.writeHead( 200, { "content-Type" : 'text/plain' } )
res.end('Hello world');
}).listen(1337, 'localhost');
Use these three steps:
Type netstat -aon on the Command Prompt
Find the relative PID number to 127.0.0.1:8080 (or 3000)
Run taskkill /f /pid pidnumber
If you want to connect using localhost you have to use "localhost" at listen.
You have to remove the IP address you've added after the port number. Your localhost already has an ip address assigned.
I was having this problem due to closing the CMD.exe window.
Try changing your port to another number and try it again
Related
I installed Nginx and Node.js in my server.
When I try run my node.js file, I get an error:
node.js:201
throw e; // process.nextTick error, or 'error' event on first tick
^
Error: listen EADDRNOTAVAIL
at errnoException (net.js:614:11)
at Array.0 (net.js:689:28)
at EventEmitter._tickCallback (node.js:192:40)
How can I fix this problem?
Thanks!
I had this issue, and I thought it was a port issue, but it turned out to be an IP issue.
I had my HOST environmental variable pointing to a static IP, and my Node server was listening to that address. At some point when my router recycled, it started assigning my machine a new IP, and I started getting the error you posted. It was fixed by changing the address my server was listening to.
My config:
app.set('port', process.env.PORT || 3000);
app.set('host', process.env.HOST || '0.0.0.0');
http.createServer(app).listen(app.get('port'), app.get('host'), function(){
console.log("Express server listening on port " + app.get('port'));
});
Make sure your host is hitting your machine. In any case, the loopback, as #miltonb suggested, should always work:
app.set('host', '127.0.0.1');
I think you need a bit more context like some of your code. I am guessing you are starting to listen on a web server or a socket? Based on that assumption, I get something similar when I run a basic web server on my test server unless I run using localhost.
events.js:48
throw arguments[1]; // Unhandled 'error' event
^
Error: listen EADDRNOTAVAIL
at errnoException (net.js:670:11)
at Array.0 (net.js:756:28)
at EventEmitter._tickCallback (node.js:190:38)
Try changing the [hostname] parameter to localhost:
var http = require('http');
http.createServer( function ).listen(8000, '127.0.0.1');
I was getting the same error, and then I changed the port and worked
Could it be that node was already running a server? I received a similar error and found this while troubleshooting. Shutting down the previous node server solved my problem.
For me, the issue was that the IP that I wrote simply didn't exists :) usually at home I have a 192.168.x.x IP, and after a restart I had a different address ... when I tried to gulp serve my app - it had a config with the old IP ....
as always 127.0.0.1 will work, but when you want to verify your website with other devices, you want to use the external IP 192.168.x.x ... or similar.
Most of the time it would be the IP address or the hostname. The reason being, node js takes that as the key item to start the server. if there is a conflict or incorrect ip address, it cribs with this error
Error: listen EADDRNOTAVAIL
hope this helps.
For me , i had the same error , and when i check my configuration , i found that host=127.0.0.0 which raises error because it should be 127.0.0.1 instead of 127.0.0.0
var express = require('express');
var app = express();
app.set('port', process.env.PORT || 3000);
app.set('host', process.env.HOST || 'localhost');
app.listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('host') + ':' + app.get('port'));
});
works for me.
it also generic for debug by localhost and your local ip without any changes.
This also will occur while 'ip addr add i:p:v:6' is still in limbo or something (just executed/ing), and the interface is I presume not totally ready to listen and still busy adding the new ipv6 address.
Using an execSync [see https://nodejs.org/api/child_process.html#child_process_child_process_execsync_command_options] to call 'sleep' for a 2 second pause seems to allow listen to not error with Error: listen EADDRNOTAVAIL.
[It's really a bug I think in NodeJS 7.4.0 on Ubuntu because this doesn't happen with ipv4 address creation at the instant before usage/listen connection.]
Check your ip ipconfig adress and add any port 3004 for example.
Code below finally work for me. In case if you want to access this server from other device in your network. Or just set local host ip to 127.0.0.1 and get access from your device.
var server = require('http').createServer(app);
server.listen(3004, '192.168.x.x', function () {
console.log("Listening on port 3000!");
});
In my case, I fixed it by checking the directory /tasks/options
I found connect.js file which had static IP address which was incorrect. I just changed it to the correct one and it worked.
I'm trying to write a node.js application, trying to make sure my environment set up first.
The webserver is Fedora 21, and I have opened port 3000 on the firewall and flushed ip tables. nmap localhost indicates that port 3000 is listening.
I'm using this node application
var http = require('http');
var PORT = process.env.PORT || 3000;
http.createServer(function (req, res) {
console.log('%d request received', process.pid);
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello world!\n');
}).listen(PORT);
console.log('%d listening on %d', process.pid, PORT);
But when I navigate the browser to my server I don't get any hello world message like intended.
Perhaps check for firewall rules? IIRC many firewalls prefer to drop packets instead of actively rejecting -- so you may find that (eventually) the web browser times out.
Easy way to check:
In one console, do: nc -l -p {whatever your PORT environment variable is set to, or 3000, as per your server logic}
and in another console, do
echo hello | nc localhost 9999
If you see the hello in the first console, you can at least rule out some tcp oddness / firewall issue.
Conclusion I'm an idiot who needs another cup of coffee.
it works 100% just instead of navigating to hostname/webapp I need to navigate to hostname:3000
I set up a Node JS server, and made a request to it, it just loads and loads and eventually says "Server not found". Here is the code for my file:
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');
When going to externalIP:1337, the phenomenon described above happens. I am running Ubuntu 14.04, node JS version 0.10.32.
What is going on?
You're specifically listening to 127.0.0.1 which is localhost. If you want to allow connection via the external IP, you should omit the '127.0.0.1' argument in your listen. i.e. change listen(1337, '127.0.0.1') to listen(1337). Otherwise go to localhost:1337 instead.
The problem is that you're only listening for requests on localhost. If you try to access the server from outside the system you won't get there because the server isn't listening on a LAN IP.
Change
.listen(1337, '127.0.0.1');
to
.listen(1337);
That will listen on all available network interfaces on the system. You could specify a LAN IP (just like you did for localhost) if you wanted to listen on a specific network interface.
Sorry.
Apparently tomcat was also using port 80. So by disabling tomcat I got it to work.
Thanks.
I installed Nginx and Node.js in my server.
When I try run my node.js file, I get an error:
node.js:201
throw e; // process.nextTick error, or 'error' event on first tick
^
Error: listen EADDRNOTAVAIL
at errnoException (net.js:614:11)
at Array.0 (net.js:689:28)
at EventEmitter._tickCallback (node.js:192:40)
How can I fix this problem?
Thanks!
I had this issue, and I thought it was a port issue, but it turned out to be an IP issue.
I had my HOST environmental variable pointing to a static IP, and my Node server was listening to that address. At some point when my router recycled, it started assigning my machine a new IP, and I started getting the error you posted. It was fixed by changing the address my server was listening to.
My config:
app.set('port', process.env.PORT || 3000);
app.set('host', process.env.HOST || '0.0.0.0');
http.createServer(app).listen(app.get('port'), app.get('host'), function(){
console.log("Express server listening on port " + app.get('port'));
});
Make sure your host is hitting your machine. In any case, the loopback, as #miltonb suggested, should always work:
app.set('host', '127.0.0.1');
I think you need a bit more context like some of your code. I am guessing you are starting to listen on a web server or a socket? Based on that assumption, I get something similar when I run a basic web server on my test server unless I run using localhost.
events.js:48
throw arguments[1]; // Unhandled 'error' event
^
Error: listen EADDRNOTAVAIL
at errnoException (net.js:670:11)
at Array.0 (net.js:756:28)
at EventEmitter._tickCallback (node.js:190:38)
Try changing the [hostname] parameter to localhost:
var http = require('http');
http.createServer( function ).listen(8000, '127.0.0.1');
I was getting the same error, and then I changed the port and worked
Could it be that node was already running a server? I received a similar error and found this while troubleshooting. Shutting down the previous node server solved my problem.
For me, the issue was that the IP that I wrote simply didn't exists :) usually at home I have a 192.168.x.x IP, and after a restart I had a different address ... when I tried to gulp serve my app - it had a config with the old IP ....
as always 127.0.0.1 will work, but when you want to verify your website with other devices, you want to use the external IP 192.168.x.x ... or similar.
Most of the time it would be the IP address or the hostname. The reason being, node js takes that as the key item to start the server. if there is a conflict or incorrect ip address, it cribs with this error
Error: listen EADDRNOTAVAIL
hope this helps.
For me , i had the same error , and when i check my configuration , i found that host=127.0.0.0 which raises error because it should be 127.0.0.1 instead of 127.0.0.0
var express = require('express');
var app = express();
app.set('port', process.env.PORT || 3000);
app.set('host', process.env.HOST || 'localhost');
app.listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('host') + ':' + app.get('port'));
});
works for me.
it also generic for debug by localhost and your local ip without any changes.
This also will occur while 'ip addr add i:p:v:6' is still in limbo or something (just executed/ing), and the interface is I presume not totally ready to listen and still busy adding the new ipv6 address.
Using an execSync [see https://nodejs.org/api/child_process.html#child_process_child_process_execsync_command_options] to call 'sleep' for a 2 second pause seems to allow listen to not error with Error: listen EADDRNOTAVAIL.
[It's really a bug I think in NodeJS 7.4.0 on Ubuntu because this doesn't happen with ipv4 address creation at the instant before usage/listen connection.]
Check your ip ipconfig adress and add any port 3004 for example.
Code below finally work for me. In case if you want to access this server from other device in your network. Or just set local host ip to 127.0.0.1 and get access from your device.
var server = require('http').createServer(app);
server.listen(3004, '192.168.x.x', function () {
console.log("Listening on port 3000!");
});
In my case, I fixed it by checking the directory /tasks/options
I found connect.js file which had static IP address which was incorrect. I just changed it to the correct one and it worked.
So I download Windows binaries from node's site and installed on my Windows 7 machine which is installed fine, when I do:
node --version
It correctly displays its version: v0.6.7
Here is the hello world program:
// app.js
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(8000, "127.0.0.1");
console.log('Server running at http://127.0.0.1:8000/');
And when I do:
node app.js
I get the response fine:
Server running at http://127.0.0.1:8000/
However, when I browser the URL http://127.0.0.1:8000, the page keeps on running (on status bar it says waiting for 127.0.0.1...).
Can anybody help me how to make it to output Hello World ?
This is what I get with curl:
$ curl -vv localhost:8000
* About to connect() to localhost port 8000 (#0)
* Trying ::1... Connection refused
* Trying 127.0.0.1... connected
* Connected to localhost (127.0.0.1) port 8000 (#0)
> GET / HTTP/1.1
> User-Agent: curl/7.21.4 (universal-apple-darwin11.0) libcurl/7.21.4 OpenSSL/0.9.8r zlib/1.2.5
> Host: localhost:8000
> Accept: */*
>
< HTTP/1.1 200 OK
< Content-Type: text/plain
< Connection: keep-alive
< Transfer-Encoding: chunked
<
Hello World
* Connection #0 to host localhost left intact
* Closing connection #0
nothing wrong with it. Try updating node to the latest stable version (but I don't see how it can help) and be sure any process except node is owning the tcp port 8000.
In my mind, this is either one of two things:
Node does not recieve the request
Node does not respond to the request
To test for either, change your code:
// app.js
var http = require('http');
http.createServer(function (req, res) {
console.log('got a request');
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(8000, "127.0.0.1");
console.log('Server running at http://127.0.0.1:8000/');
Try again.
If node does not get the request, try changing the port to 80 instead of 8000, I had a funny case with firefox blocking non-conventional ports a couple of weeks ago.
Let me know how you go
Have you checked your Anti Virus or Windows Firewall?
Whichever one you use you might want create a temp exception or disable it for a while just to make sure nothing is getting in the way there.
Try changing your listen address to 0.0.0.0. Maybe you're having problems binding to that specific loopback.