Cannot set an IP address on Express JS app
Multi tool use
Clash Royale CLAN TAG#URR8PPPCannot set an IP address on Express JS app
Trying to test an endpoint in express But keep getting 404 error.
var express = require("express")
var app = express()
//var http = require('http').Server(app)
app.get('/', function(req,res){
res.send('ok from end point')
})
var port = process.env.PORT|| 8080
var localhost = 'someLocalHost.med.gov'
console.log({'localhost':localhost,
'post':port})
//
app.listen(port,localhost,function(err){
if (err){
console.log('err')
}
else {
console.log('Listening')
}
})
||
process.env.PORT
8080
process.env.PORT
8080
Perhaps you need to read about how DNS works. Your server runs at an IP address and a client connects to an IP address. It is DNS that allows a client to lookup
somehost.med.gov and find out the IP address that it should use to connect with.– jfriend00
yesterday
somehost.med.gov
2 Answers
2
Localhost refers to 127.0.0.1. You can't just launch a server on any address that you want. If you're wanting to override localhost you can look into modifying your HOSTS file locally to setup an alias for localhost.
127.0.0.1
localhost
HOSTS
localhost
So I ended up http:// IP_ADDRESS:8080 and that took care of it.
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Look up the
||operator. You are doingprocess.env.PORTOR8080. In other words, ifprocess.env.PORTis set, that's the value that will be used, and8080will only be used if the former is not set.– Claies
yesterday