npm install -g node-inspector
přepínač -g znamená, že se nainstaluje do /Users/bydga/.nvm/versions/node/v4.2.1/bin/node-inspector
OT: standardní npm install express
nainstaluje modul do aktuální složky, do ./node_modules/express
mkdir debug
cd debug
npm init
npm install -S express async
uděláme soubor lib/model.js
var users = [
{id: 1, name: "jednicka" },
{id: 2, name: "dvojka" },
{id: 3, name: "trojka" }
]
module.exports = {
getRandomUser: (next) => {
var duration = Math.floor(Math.random() * 500) + 100
var user = users[Math.floor(Math.random()*users.length)]
console.log("getRandomUser called, will return result in", duration)
setTimeout(() => {next(null, user)}, duration)
}
}
soubor index.js
var express = require("express")
var async = require("async")
var model = require("./lib/model")
app = express()
app.get("/", (req, res) => {
console.log("got req on /")
var start = new Date()
async.parallel({
one: (next) => {
model.getRandomUser((e, user) => {
if (e)
return next(e)
return next(null, user)
})
},
two: (next) => {
model.getRandomUser(next)
},
three: (next) => {
model.getRandomUser(next)
},
}, (err, results) => {
if (err)
return res.json({error: err})
var took = new Date() - start
res.json({results: results, took: took})
})
})
var port = 8000
app.listen(port, () => {console.log("listening on " + port)})
node --debug index.js
node-inspector
otevřeme v prohlížeči adresu co nám vypíše node-inspector (něco jako http://localhost:8080/?ws=localhost:8080&port=5858)