C10 Node.js S1

[AliMD]

Welcome

Salam, In class janbeye ashnayi ba class node.js ro dare mamoolan hame sare asp va php dava daran vali ma mihkaym begim bikhiyal har2 say mikonam bishtar farsi benevisam ta mafahim roshan beshe

Intro

Node.js be shoma ejaze mide ta network application haro ba javascript samte server besazid ! Yani: Server Side JavaScript ! Node.js az V8 JavaScript Runtime estefade mikone, Yani: Chrome JavaScript Engine ! (Fastest js engine)

Usage

Be che darde ma mikhore ?!

• Websocket Server (Chat Server)
• Fast File Upload Client
• Ad Server
• Any Real-Time Data Apps

  Its Not

nabayad dar morede node.js eshtebah konid

• A Web Framework
• Multi-threaded (Like a single threaded server)
• For Beginners (node.js is very low level)

  None Blocking Programming

Blocking Code

var contents = fs.readFileSync('/etc/hosts'); //1 (Freezing)
console.log(contents); //2

console.log('Doing something else'); //3

Non-Blocking Code

fs.readFile('/etc/hosts', function(err, contents) { //1
  console.log(contents); //3
});

console.log('Doing something else'); //2

or

var callback = function(err, contents) { //1
  console.log(contents); //3
};
fs.readFile('/etc/hosts', callback);

console.log('Doing something else'); //2

Blocking vs Non-Blocking

var callback = function(err, contents) {
  console.log(contents);
};
fs.readFile('file1', callback);
fs.readFile('file2', callback);

Read file 1 : 10s Read file 2 : 12s

Blocking : Read 2 file take 22s Non-Blocking : Read 2 file take 12s or little more

Hello Class

hello.js

var http = require('http'); // require http module

http.createServer(function(request, response) {
  response.writeHead(200); // Send status code to client (in header)
  response.write("Hello Class ;)"); // Send contnt
  response.end(); // Close the connection
}).listen(1234); // Listen for connections on port :1234

console.log("I'm Alive.");

node hello.js // run server
//> I'm Alive.
curl http://localhost:123
//> Hello Class ;)

The event loop

1. Checking for Events
2. Find request event
3. Call my custom event

var http = require('http');
http.createServer(function(request, response) {
  // my custom event
}).listen(8080);
console.log('Listening on port 8080...');

Dar har zaman faghat yek event pardazesh mishe !

Another Sample

var http = require('http');

http.createServer(function(request, response) {
  response.writeHead(200);
  response.write("Hello Class ;)");

  setTimeout(function(){
    response.write("I'm Ali.MD !");
    response.end();
  }, 5000); // 5s

}).listen(1234);

Blocking vs Non-Blocking

Class Works

1. Simple Hello server
2. Convert Blocking
3. Read File in Server
4. Response WriteHead
5. Send message in end

   Register

Baraye doostani ke tamayol be sherkat dar class ro darand, hanooz ham forsate sabte nam hast, http://ali.md/regclass

[ehsansh]

@AliMD pish niazesh chi hast ostad? albate Node.js tuie ali.md/regclass S3 hast gamunam inja eshteba neveshtin S1 ....?

[ghost]

heif js balad nistam :| vagarna ashegh iin node.js shodam !

[AliMD]

@ehsansh S1 yani jalase aval :D @mghayour jan ! toro che be node.js akhe ! aval js ro herfeyi shod bad

[MOHS3N]

Hello ! I'm Frist

[mrmr68]

thanks sire ... :D

[MOHS3N]

man az haminja elam mikonam ke eftekhar mikonam az inke kenare jenabe aghaye @AliGH neshastam

[AliGH]

man Ham Az inke dar kenar Ostad Azim jenab @MOHS3N hastam , Hangam

[artajalli]

hey ... Thanks ... :)

[jafarrasooli]

hhi there

[MOHS3N]

o.

[AliMD]

Class Work 2

ye file index.html besazid ! va code zir ro be Non-blocking taghir bedid

var fs = require('fs');
var contents = fs.readFileSync('index.html');
console.log(contents);

[AliMD]

ClassWorks 1: Create simple server

var http = require('http');

http.createServer(function(request, response) {
  // Answer goes here.
}).listen(8080);

[AliMD]

ClassWork 2: Convert Blocking

ye file index.html besazid ! va code zir ro be Non-blocking taghir bedid

var fs = require('fs');
var contents = fs.readFileSync('index.html');
console.log(contents);

[jafarrasooli]

var fs = require('fs'); back = function( err , contents ){ console.log(contents+''); } fs.readFile('index.html',back(err , contents));

[MOHS3N]

var fs = require('fs');
var callback2 = function(error, contents) { 
  console.log(contents); 
};
fs.readFile('index.html', callback2);

console.log('ZendehAm');

[mrmr68]

class work 2

var fs = require('fs');
fs.readFile('index.html',function(err,content){
    console.log(content+"");
});
console.log("man va to");

[AliMD]

ClassWork 3: Read File in Server

mesale balaro bejaye inke too console log kone, ye server besazin va be client befrestin ye chizi too in maye ha

var
  http = require('http'),
  fs = require('fs');

http.createServer(function(request, response) {
  response.writeHead(200);

  response.end();
}).listen(8080);

[MOHS3N]

var
  http = require('http'),
  fs = require('fs');

http.createServer(function(request, response) {
  response.writeHead(200);
  var html = fs.readFileSync('index.html');
  response.write(html);

  response.end();
}).listen(3030);

Ok is :end:

[jafarrasooli]

var
  http = require('http'),
  fs = require('fs');

http.createServer(function(request, response) {
  response.writeHead(200);
  fs.readFile('index.html',function(err,contents){
        response.write(contents);
        response.end();
  });

}).listen(1251);

[mrmr68]

class work 3

var http = require('http');
var fs = require('fs');
http.createServer(function(req, res) {
  res.writeHead(200); 

    fs.readFile('index.html',function(err,content){
        res.write('man va to va ooo' + content);
        res.end();
    });

}).listen(4321);

[AliMD]

ClassWork 4, Response Write Head

writeHead mitoone parameter haye bishtari begire http://nodejs.org/docs/v0.6.18/api/http.html#http_response_writehead_statuscode_reasonphrase_headers mikham yek Content-Type barabare text/html ham be browser befrestid

[AliMD]

classwork hayi ke moondesh ro be onvane homework anjam bedid

[ehsansh]

@AliMD ostad man mitunam in dore ro biam? man bekham js bishtar iad begiram baiad biam hamin kelas ia S2?

[MOHS3N]

Az daste in Node.js Emshab be bi khabi mofrad dochaar shodam Va Be sorat kamelan tasadofi Az in Babat Khoshalam :trollface:

[AliMD]

@ehsansh nemidoonam cheghadr be js alaghe mand shodi vali alan bayad hadde aghal ye proje tejari besazi bad khodet raheto entekhab koni w4 va w5 baraye bahs haye mali barat lazem tare vali in class (s2) baraye yadgiriye shakhsi khoobe felan barat karborde maliye khassi nadare tasmim ba khodet

[Mrshcom]

khob ba arze poshesh babate dir hazer shodan! :dancer: hazeeeeeeeeeeeeeeeer! :D

[MOHS3N]

@AliMD man mikham ye site static ro ba node.js bala beyaram. OK?

 response.writeHead(200,{
        'Content-Type': 'text/html',

    });

vali natonestam img ha css ha ro load konam. toye console in error neshon midee

Resource interpreted as Image but transferred with MIME type text/html

[Mrshcom]

image ro nbayad khob type text bedi dg! image typesh text nis bara hamn in error ro mide!

[MOHS3N]

@Mrshcom Dorost megi mohammadReza , vali man nemitonam chanta Content-Type Benvisam , age chanta benevisam Hamishe Akharin 'Content-Type estefadeh mikone

[ehsansh]

@AliMD mamnun az rahnamaie. pas man hamun W4 ia W5 ro miam k lazemtare ta bad..... dostan bebakhshid vasate kelas umadam Good Luck :)

[AliMD]

Class be hade nesab sabte nam naresid, cancel

in term faghat 3 class mitoonam tashkil bedam

[AliMD]

@nasser-torabzade, @mrmr68, @jafarrasooli, @artajalli mohsen migoft azinke poshte sare jquery bad goftam kami delkhor shodin ! chon team khoobi hastin ino migam, yek developer hich vaght az taghir, pishraft va test rah haye jadid nemitarse. az tarafi in class hich rabti be jquery ya layout man dar css nadare !!! be har hal agar roozi nazaratam ro ghabool kardid man hamchenan dar khedmatam.

[MOHS3N]

@AliMD plz help me . manoo Nejad Bedeh az dast enna . Man nemikham Az Aghaedam Dast Bekesham.