NodeJS

Thursday, September 30, 2021

NodeJS 34: Send email from NodeJS using nodemailer

Reference blog - https://www.w3schools.com/nodejs/nodejs_email.asp

Sendmail.js

"use strict";
const nodemailer = require("nodemailer");

// async..await is not allowed in global scope, must use a wrapper
async function main() {
  // Generate test SMTP service account from ethereal.email
  // Only needed if you don't have a real mail account for testing
  //let testAccount = await nodemailer.createTestAccount();

  //If we get this error - 535-5.7.8 Username and Password not accepted. Learn more at\n535 5.7.8 
  //then we
  //Need to turn on Less secure apps from this link - https://myaccount.google.com/lesssecureapps
  console.log("Entered main method.............");
  // create reusable transporter object using the default SMTP transport
  let transporter = nodemailer.createTransport({
    host: "smtp.gmail.com",
    port: 587,
    secure: false, // true for 465, false for other ports
    auth: {
      user: "pavan.******@gmail.com", // generated ethereal user
      pass: "********", // generated ethereal password
    },
  });
  console.log("Transporter object is ready.........");
  // send mail with defined transport object
  let info = await transporter.sendMail({
    from: '"Test Mail" <foo@example.com>', // sender address
    to: "pavankumar******@gmail.com", // list of receivers
    subject: "Mail from NodeJS app ✔", // Subject line
    text: "Mail from NodeJS app...?", // plain text body
    html: "<b>Hello...</b>", // html body
  });

  console.log("Message sent: %s", info.messageId);
  // Message sent: <b658f8ca-6296-ccf4-8306-87d57a0b4321@example.com>

  // Preview only available when sending through an Ethereal account
  console.log("Preview URL: %s", nodemailer.getTestMessageUrl(info));
  // Preview URL: https://ethereal.email/message/WaQKMgKddxQDoou...
}

main().catch(console.error);

Monday, March 2, 2020

NodeJS 33: MongoDB connect using Mongoose

https://scotch.io/tutorials/using-mongoosejs-in-node-js-and-mongodb-applications

https://mongodb.github.io/node-mongodb-native/driver-articles/mongoclient.html

In Terminal:
npm install mongoose --save

items.js (Create Model)

// grab the things we need

var mongoose = require('mongoose');

var Schema = mongoose.Schema;

// create a schema

var itemSchema = new Schema({

item: String,

available: Boolean,

soldQty: Number

});

// the schema is useless so far

// we need to create a model using it

var Item = mongoose.model('Item', itemSchema);

// make this available to our users in our Node applications

module.exports = Item;

IPLService.js (Save Model to MonogoDB)

var express = require('express');

var Item = require('./item');

var mongoose = require('mongoose');

mongoose.connect('mongodb://localhost/test');

app.post('/BuildFlows',function(req,resp){

resp.writeHead(200,{'Content-Type':'application/json','Access-Control-Allow-Origin' : '*','Access-Control-Allow-Methods': 'GET,POST,OPTIONS,DELETE,PUT'});

console.log('Inside post - BuildFlows');

console.log(req.body);

var item1 = new Item(req.body);

console.log("item1 : "+item1);

item1.save(function(err) {

if (err) throw err;

console.log('Item saved successfully...........');

});

resp.setHeader('Content-Type', 'application/json');

resp.end(JSON.stringify(req.body, null, 3));

});

Sunday, September 16, 2018

NodeJS 32: SocketIO -> ChatApp

#######################################CODE##################################

#################################
index.html
#################################
<html>
<head>

<title>Chat App</title>


<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">


<script
src="https://code.jquery.com/jquery-2.2.4.min.js"
integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44="
crossorigin="anonymous"></script>


<script src="/socket.io/socket.io.js"></script>

<style>
body{
margin-top:30px;
}
</style>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-4">
<div class="well">
<h3>Online users</h3>
<ul class="list-group" id="users"></ul>
</div>
</div>
<div class="col-md-8">
<div class="chat" id="chat"></div>
<form id="messageForm">
<div class="form-group">
<label>Enter Message</label>
<textarea class="form-control" id="message"></textarea>
<br/>
<input type="submit" class="btn btn-primary" value="Send Message"/>
</div>
</form>
</div>
</div>
</div>

<script>
$(function(){
var socket=io.connect();//new connection to server
var $messageForm=$('#messageForm');
var $message=$('#message');
var $chat=$('#chat');
$messageForm.submit(function(e){//event handler for submit button click
e.preventDefault(); //disable default click event
socket.emit('send message',$message.val());//trigger 'send message' event
$message.val('');
console.log('submitted');
});

//listen for new message from server
socket.on('new message',function(data){
$chat.append('<div class="well">'+data.msg+'</div>');
});

});
</script>
</body>

</html>

#################################
server.js
#################################
var express=require('express');
var app=express();
var server=require('http').createServer(app);
var io=require('socket.io').listen(server);

users=[];
connections=[];

server.listen(3000);
console.log('server listening on 3000');

app.get('/',function(req,resp){
resp.sendFile(__dirname+'/index.html');
});

io.sockets.on('connection',function(socket){//when user connects to the chat server
connections.push(socket);
console.log('Connected : %s socket connection',connections.length);
socket.on('disconnect',function(){//when user disconnects from the chat server
connections.splice(connections.indexOf(socket),1);
console.log('Disconnected : %s socket connection',connections.length);
}) ;

//once user click on send -> this will trigger
socket.on('send message',function(data){
console.log(data);
io.sockets.emit('new message',{msg:data});//then server emits this message to broadcast to all users
});

});

#################################
package.json
#################################
{
"name": "mychatapp",
"version": "1.0.0",
"description": "mychatapp",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "pavan",
"license": "ISC",
"dependencies": {
"express": "^4.16.3",
"socket.io": "^2.1.1"
}
}

#################################CODE END#################################

NodeJS 31: UnitTesting with NodeJS - Mocha & Chai

########################################CODE##############################

###############################
test.js
###############################
var chai=require('chai');
var expect=chai.expect;

chai.should(); //activate assertion framework on mocha engine

function returnName(name){
return name;
}

function addNumbers(num){
return num+num;
}
function IsEven(inputVal){
return (inputval % 2)===0;
}

describe('Math Operation',function(){
it('Returns a value added to itself',function(){
addNumbers(5).should.equal(10);
});
it('Should return true for even number',function(){
IsEven(4).should.equal(true);
});
});

//test case
describe('1st unit test',function(){
it('Returns the name passed',function(){
returnName('Amit').should.equal('Amit');
});
});

###############################
app.js
###############################
module.exports=function(){
return 'hello';
}

###############################
appTest.js
###############################
const assert=require('chai').assert;
const app=require("../app");

describe('App',function(){
it('app should return hello..',function(){
assert.equal(app(),'hello');
});

it('app should return string..',function(){
assert.typeOf(app(),'string');
});

});

###############################CODE END ###############################

NodeJS 30: BuildTook with NodeJS - Using GULP

#################################CODE########################################

#############################
gulpfile.js
#############################
var gulp=require('gulp');

var uglify=require('gulp-uglify');

gulp.task('scripts',function(){
gulp.src('src/*.js').pipe(uglify()).pipe(gulp.dest('dist'));
});

#############################
package.json
#############################
{
"name": "automation",
"version": "1.0.0",
"description": "automation",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "pavan",
"license": "ISC",
"dependencies": {
"gulp": "^3.9.1",
"gulp-uglify": "^3.0.1"
}
}

#############################
first.js
#############################
function myFirstFunction(){
return "first";
}

#############################
second.js
#############################
function mySecondFunction(){
return "second";
}

#############################CODE END#############################

NodeJS 29: BuildTook with NodeJS - Using GRUNT

#######################################CODE################################

######################
Gruntfile.js
######################
module.exports=function(grunt){
//trying to merge multiple js and send it to client as one file
//when we run the command it does automatically
grunt.initConfig({
concat :{ //to concatinate all js files in to 1 file
js: {
src: ['js/1.js', 'js/2.js'],
dest: 'build/js/scripts.js',
},
css: {
src: ['css/1.css', 'css/2.css'],
dest: 'build/css/styles.css',
}
},
watch:{ //to watch for file changes and execute
js:{
files: ['js/**/*.js'],
tasks: ['concat:js'], //to call only contact : js
},
css:{
files: ['css/**/*.css'],
tasks: ['concat:css'], //to call only contact : css
}
}
});

//load this module
grunt.loadNpmTasks('grunt-contrib-concat');
//load this module
grunt.loadNpmTasks('grunt-contrib-watch');

//to automatically execute add it in 'default' section..
//CMD : grunt
grunt.registerTask('default',['concat','watch']);

}

######################
package.json
######################
{
"name": "grunt1",
"version": "1.0.0",
"description": "grunt",
"main": "1.js",
"dependencies": {
"grunt": "^1.0.3",
"grunt-cli": "^1.3.1",
"grunt-contrib-concat": "^1.0.1",
"grunt-contrib-watch": "^1.1.0"
},
"devDependencies": {},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "pavan",
"license": "ISC"
}

######################CODE END ############################################

Thursday, September 30, 2021

NodeJS 34: Send email from NodeJS using nodemailer

Monday, March 2, 2020

NodeJS 33: MongoDB connect using Mongoose

NodeJS 33: MongoDB connect using Mongoose

Sunday, September 16, 2018

NodeJS 32: SocketIO -> ChatApp

NodeJS 31: UnitTesting with NodeJS - Mocha & Chai

NodeJS 30: BuildTook with NodeJS - Using GULP

NodeJS 29: BuildTook with NodeJS - Using GRUNT

NodeJS 28: BuildTook with NodeJS (GRUNT & GULP)