Updating Global Packages, NPM

https://docs.npmjs.com/getting-started/updating-global-packages

#NPM을 통해서 다운받았던 글로벌 패키지들을 업데이트합니다.
링크에 나와있는 내용을 기반으로 업데이트를 진행해봤습니다.
사용하는 모듈이 최신버전이 아닐경우 문제가 생기는 경우가 간혹 있어서
업데이트하는 방법을 찾아봤는데 어렵지 않더라구요.

공유합니다.


$npm updated -g



#Update these outdated list

$npm update -g

Node.js Expressjs error, payload too large

I have some error
using Node.js + expressjs

Error message : payload too large

Detail message (on front-end browser):
Failed to load resource: the server responded with a status of 413 (Payload Too Large)

This error can fix it with simple code.

add limit option to
bodyParser.json({})
bodyParser.urlencoded({})

app.use(bodyParser.json({limit: '50mb'})); app.use(bodyParser.urlencoded({ extended: false, limit: '50mb' }));

I hope you save time

Node.js + Express.js + Bootstrap(부트스트랩) 시작하기

부트스트랩을 Node.js 서버랑 사용해보기!
튜토리얼 시작해보겠습니다.

우선 이 튜토리얼은 Node.js가 설치되어있다는 가정하에 시작하겠습니다.

그리고 Express를 사용하기 위해서 설치해야 하는 것,
express-generator입니다. (꼭 설치해야한다는 것 보다, 프로젝트 만들기 편합니다.)

express-generator 설치해줍니다.
$npm install express-generator -g

다 설치가 되었다면,
express 명령어로 프로젝트를 생성해줍니다.
$express -e myproject

여기서, express -h로 express 명령어의 help를 보겠습니다.


Usage: express [options] [dir]

Options:
    -h, --help          output usage information
    -V, --version       output the version number
    -e, --ejs           add ejs engine support (defaults to jade)
        --hbs           add handlebars engine support
    -H, --hogan         add hogan.js engine support
    -c, --css  add stylesheet support (less|stylus|compass|sass) (defaults to plain css)
        --git           add .gitignore
    -f, --force         force on non-empty directory

-e 의 의미는 ejs 엔진을 사용하겠다는 옵션입니다.
ejs는 Embeddedjs로 http://www.embeddedjs.com/
위의 링크에서 자세한 내용을 보실수 있을겁니다.

자, 다시 프로젝트를 만든 시점에서
아래와 같은 출력을 볼 수 있을겁니다.

   create : myproject
   create : myproject/package.json
   create : myproject/app.js
   create : myproject/public/javascripts
   create : myproject/routes
   create : myproject/routes/index.js
   create : myproject/routes/users.js
   create : myproject/public
   create : myproject/public/images
   create : myproject/views
   create : myproject/views/index.ejs
   create : myproject/views/error.ejs
   create : myproject/public/stylesheets
   create : myproject/public/stylesheets/style.css
   create : myproject/bin
   create : myproject/bin/www

   install dependencies:
     > cd myproject && npm install

   run the app:
     > SET DEBUG=myproject:* & npm start

위에 나온 install dependencies를 따라해봅시다.

$cd myproject && npm install

출력>
+-- body-parser@1.13.3
| +-- bytes@2.1.0
| +-- content-type@1.0.1
| +-- depd@1.0.1
| +-- http-errors@1.3.1
| | +-- inherits@2.0.1
...

다 설치됬습니다.
실행해볼까요?

$npm start

결과 페이지는 다음과 같습니다.

텅 비어있는 기본페이지 입니다.
저희는 여기에 부트스트랩을 끼얹어볼거에요.

부트스트랩 받아봅니다.
http://bootstrapk.com/getting-started/#download

npm, bower 사용해서 다운받을 수 있지만 저희는
CDN(Content Delivery Network)에 있는 부트스트랩을 사용해보겠습니다.

myproject/views/index.ejs를 아래와 같이 수정해줍니다.




수정된 화면은 아래와 같습니다.

부트스트랩 기본 예제에서 가져온 코드입니다.
http://bootstrapk.com/examples/jumbotron/

부트스트랩을 다운받아서 사용하지 않고 인터넷에서 받아서 사용했는데
다음 포스팅에서는 다운받아서 사용하는 방법을 소개해보겠습니다.

감사합니다

Nightwatch.js

Nightwatch.js

homepage: http://nightwatchjs.org/
Nightwatch.js GitHub: https://github.com/nightwatchjs/nightwatch

Nightwatch.js is testing solution.
In nightwatch homepage say:
 "Nightwatch.js is an automated testing framework for web applications and websites, written in Node.js and using the Selenium WebDriver API."

- Guide
Guide : http://nightwatchjs.org/guide

- Install

//install nightwatch
$npm install nightwatch

//install selenium server
$wget http://selenium-release.storage.googleapis.com/2.53/selenium-server-standalone-2.53.0.jar

//runing
$java -jar selenium-server-standalone-2.53.0.jar

11:47:47.404 INFO - Launching a standalone Selenium Server
11:47:47.690 INFO - Java: Oracle Corporation 25.60-b23
11:47:47.690 INFO - OS: Windows 8.1 6.3 x86
11:47:47.819 INFO - v2.53.0, with Core v2.53.0. Built from revision 35ae25b
11:47:48.155 INFO - Driver class not found: com.opera.core.systems.OperaDriver
11:47:48.155 INFO - Driver provider com.opera.core.systems.OperaDriver is not registered
11:47:48.169 INFO - Driver provider org.openqa.selenium.safari.SafariDriver registration is skipped:
registration capabilities Capabilities [{browserName=safari, version=, platform=MAC}] does not match the current platform WIN8_1
11:47:48.170 INFO - Driver class not found: org.openqa.selenium.htmlunit.HtmlUnitDriver
11:47:48.170 INFO - Driver provider org.openqa.selenium.htmlunit.HtmlUnitDriver is not registered
11:47:49.851 INFO - RemoteWebDriver instances should connect to: http://127.0.0.1:4444/wd/hub
11:47:49.851 INFO - Selenium Server is up and running

//help selenium server
$java -jar selenium-server-standalone-2.53.0.jar -help

- Configure
//file setting, nightwatch.json

- In my test

1. Start selenium server
$java -jar selenium-server-standalone-2.53.0.jar

2. Start nightwatch

##Before start nightwatch##
$npm install nightwatch -g
$mkdir nightwatch-test
$cd nightwatch-test
$npm install nightwatch
$cp -r node_modules/nightwatch/examples .
##End##

//Do tests
$nightwatch

[Digg] Test Suite
=================
digg module is disabled, skipping...

[Github] Test Suite
===================

Running:  Demo test GitHub

Error retrieving a new session from the selenium server
{ state: 'unhandled error',
  sessionId: null,
  hCode: 17478365,
  value:
   { buildInformation:
      { buildRevision: '35ae25b',
        buildTime: '2016-03-15 17:00:58',
        releaseLabel: '2.53.0',
        hCode: 87554,
        class: 'org.openqa.selenium.internal.BuildInfo' },
     cause: null,
     systemInformation: 'System info: host: \'pineoc-pc\', ip: \'192.168.99.1\', os.name: \'Windows 8.1\', os.arch: \'x86\', os.version: \'6.3\', java.version: \'1.8.0_60\'',
     additionalInformation: '\nDriver info: driver.version: FirefoxDriver',
     screen: null,
     suppressed: [ [length]: 0 ],
     class: 'org.openqa.selenium.WebDriverException',
     localizedMessage: 'Cannot find firefox binary in PATH. Make sure firefox is installed. OS appears to be: WIN8_1\nBuild info: version: \'2.53.0\', revision: \'35ae25b\', time: \'2016-03-15 17:00:5
8\'\nSystem info: host: \'pineoc-pc\', ip: \'192.168.99.1\', os.name: \'Windows 8.1\', os.arch: \'x86\', os.version: \'6.3\', java.version: \'1.8.0_60\'\nDriver info: driver.version: FirefoxDriver',
     supportUrl: null,
     message: 'Cannot find firefox binary in PATH. Make sure firefox is installed. OS appears to be: WIN8_1\nBuild info: version: \'2.53.0\', revision: \'35ae25b\', time: \'2016-03-15 17:00:58\'\nSyst
em info: host: \'pineoc-pc\', ip: \'192.168.99.1\', os.name: \'Windows 8.1\', os.arch: \'x86\', os.version: \'6.3\', java.version: \'1.8.0_60\'\nDriver info: driver.version: FirefoxDriver',
     hCode: 5692872 },
  class: 'org.openqa.selenium.remote.Response',
  status: 13 }

Connection refused! Is selenium server started?

...
install firefox please.

I will return install firefox next time.

Node.js monitoring tool + managing tool "PM2"

GitHub: https://github.com/Unitech/pm2

official site: http://pm2.keymetrics.io/

Install
$npm install pm2 -g

Start
$pm2 start app.js


more informations on GitHub

Node.js Express4 make https server

Make https server using Node.js + Expressjs v4

1. Make expressjs project

$express https_server
$cd https_server && npm install

2. Make cert, key file

$openssl genrsa 1024 > key.pem

using this key.pem file, make cert file.

$openssl req -x509 -new -key key.pem > cert.pem

Insert these data.

- Country Name
- State or Province Name
- Locality Name
- Organization Name
- Organization Unit Name
- Common Name
- Email Address

cert, key file ready to make https server.

3. Edit server code
(bin/www file code)





4. Run
$npm start

(if you occur error, please run on root)

Good luck!


ps1. bin/www file code added part
https://gist.github.com/pineoc/b1d9c31e5e0600d328fc#file-https-server-bin-www-js-L95-L111
ps2. file dir tree image

Webstorm require unresolved warnings

Warning is this

Warning delete simple





My Webstorm version is 11.0.3

preferences->  Languages & Frameworks -> Node.js and NPM

Code Assistance
Node.js Core library enable

Enable!

And you will can not see the warnings 'require'

node-apn muti push

Using node-apn

Multi push to devices

node-apn link: https://github.com/argon/node-apn

GitHub example on node-apn :
https://github.com/argon/node-apn/blob/master/examples/sending-to-multiple-devices.js

mongo-express, const error

C:\Users\test\AppData\Roaming\npm\node_modules\mongo-express\app.js:5
const clc             = require('cli-color');
^^^^^
SyntaxError: Use of const in strict mode.
    at exports.runInThisContext (vm.js:73:16)
    at Module._compile (module.js:443:25)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Function.Module._load (module.js:310:12)
    at Function.Module.runMain (module.js:501:10)
    at startup (node.js:129:16)
    at node.js:814:3

This error occur on node.js v0.10.x

Update node.js version to 4.x OR 5.x
and will be no error.

good luck

MEAN stack

MEAN stack
http://mean.io/#!/
https://github.com/linnovate/mean/

MEAN stack means MongoDB + Express.js + Angular.js + Node.js

Start for MEAN stack
http://learn.mean.io/#mean-stack


- start install

//prerequisite packages
$npm install -g gulp
$npm install -g bower

//install mean
$npm install -g mean-cli

$cd project && npm install

$bower install
$gulp

//app start
$node server

Node.js install version 4.x and 5.x

Node.js download Link : https://nodejs.org/en/download/package-manager/

Using package manager (My case is Ubuntu, apt-get)

Nodejs.org site page below.

Debian and Ubuntu based Linux distributions

Also including: 

Linux Mint, Linux Mint Debian Edition (LMDE), elementaryOS and others.

Node.js is available from the NodeSource Debian and Ubuntu binary distributions repository (formerly Chris Lea'sLaunchpad PPA). 

Support for this repository, along with its scripts, can be found on GitHub at nodesource/distributions.

NOTE: If you are using Ubuntu Precise or Debian Wheezy, you might want to read about

running Node.js >= 4.x on older distros.

curl -sL https://deb.nodesource.com/setup_4.x | sudo -E bash -
sudo apt-get install -y nodejs

Alternatively, for Node.js v5:

curl -sL https://deb.nodesource.com/setup_5.x | sudo -E bash -
sudo apt-get install -y nodejs

Optional: install build tools

To compile and install native addons from npm you may also need to install build tools:

sudo apt-get install -y build-essential

Node.js + Express4 use forever + nodemon

Use command on project directory.

$ forever start -c nodemon ./bin/www

Node.js v5.0 install on ubuntu

If you want to install Node.js version 5.0

using NVM
GitHub : https://github.com/creationix/nvm

1. install script (file : nvm.sh)

- using curl

$curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.30.1/install.sh | bash

- using wget

$wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.30.1/install.sh | bash

2. manual install

$git clone https://github.com/creationix/nvm.git ~/.nvm && cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`

# If console shows no command 'nvm' found,
add to ~/.bashrc OR ~/.profile OR ~/.zshrc append this code.

export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh" # This loads nvm

3. install Node.js

$nvm install 5.0

4. use Node.js - use 5.0 version

$nvm use 5.0

And now just use it, Node.js v5.0

node.js 사용시 npm install -g 한 프로그램들이 실행되지 않는 경우

$sudo ln -s /usr/bin/nodejs /usr/local/bin/node
위의 명령어로 디렉토리를 복사해줘야 실행이 된다.
forever, pm2 를 사용하려 했는데 명령어는 있는 것 같은데
실행이 안되서 찾아봤더니 폴더 경로가 안맞는거라서
디렉토리만 연결해주면 실행이 잘된다.

linux reserve command for reload nodejs

echo "kill 8009 && nohup node app 2" | at 01:30 2015-03-04

kill [process id] && nohup node app 

and 

use at command

(this command serviced by atd)

리눅스에서 예약작업을 위해 at 명령어를 쓰는데

atd(at 데몬)이 켜져있어야 하며

(안켜져 있으면 service std start 해주면 된다) 

테스트 명령어는

echo "echo hello > /home/test/test.txt" | at 1:30 2015-03-04

위의 명령어로 테스트 후에

node app을 재 실행하는 명령어로 다시 바꿔서

우선 node app pid를 알아내고 그후에 작업시작

echo "kill 8009 && nohup node app 2" | at 01:30 2015-03-04

했더니 잘 된다.

node.js server cluster test

Node.js Server Cluster test Benchmark using AB(Apache Banchmark)

server code(no cluster)

var http = require("http");

http.createServer(function(request, response) {
    var s = 64*1024;
  var buf = new Buffer(s);
  for(var i=0;i<buf.length;i++){
    buf[i]=100;
  }
    //console.log("Request for:  " + request.url);
    response.writeHead(200);
    response.end(buf);
  }).listen(3000);

output
==========================================

==========================================

ab result

Server Software:
Server Hostname:		localhost
Server Port:		3000
Document Path:		/
Document Length:		65536 bytes
Concurrency Level:		200
Time taken for tests:		17.481 seconds
Complete requests:		10000
Failed requests:		0
Total transferred:		656110000 bytes
HTML transferred:		655360000 bytes
Requests per second:		572058.72
Transfer rate:		37533344.59 kb/s received
Connnection Times (ms)
	min	avg	max
Connect:	0	0	15
Processing:	40	346	826
Total:	40	346	841

server code(cluster)

var cluster = require("cluster");
var http = require("http");
var numCPUs = require("os").cpus().length;

if (cluster.isMaster) {
  for (var i = 0; i < numCPUs; i++) {
    cluster.fork();
  }
} else {
  var s = 64*1024;
  var buf = new Buffer(s);
  for(var i=0;i<buf.length;i++){
    buf[i]=100;
  }
  http.createServer(function(request, response) {
    //console.log("Request for:  " + request.url);
    response.writeHead(200);
    response.end(buf);
  }).listen(3000);
}

output
======================================

======================================

ab result

Server Software:
Server Hostname:		localhost
Server Port:		3000
Document Path:		/
Document Length:		65536 bytes
Concurrency Level:		200
Time taken for tests:		19.403 seconds
Complete requests:		10000
Failed requests:		0
Total transferred:		656110000 bytes
HTML transferred:		655360000 bytes
Requests per second:		515385.73
Transfer rate:		33814973.33 kb/s received
Connnection Times (ms)
	min	avg	max
Connect:	0	0	13
Processing:	70	385	809
Total:	70	385	822