Node.js is a platform for building scalable server-side web applications using JavaScript. It uses non-blocking I/O and event-driven architecture to handle thousands of concurrent connections with high throughput and low latency. Some key features include using Google's V8 JavaScript engine, support for CommonJS modules, asynchronous and event-driven programming, and a large ecosystem of open-source modules. Node.js is particularly suited for real-time web applications that require bidirectional communication.

1. Server-Side JavaScript
Developement
Node.JS Quick Tour
q3boy <q3boy1@gmail.com>

2. Server-Side JavaScript
Development

3. Aptana Jaxer (SpiderMonkey)
Helma (Rhino)

4. •
•

5. Revelutions in 2009
• CommonJS (ServerJS), by Dangoor
• JSConf, by Chris Williams & Iterative Designs
• Node, by Ray Dahl.

6. Node's goal is to provide an easy
way to build scalable network
programs
-- nodejs.org

7. Ray Dahl

8. • 1/5/2009 Ryah Dahl
• 2/15/2009
• 5/31/2009
• ......
• 11/16/2010 v0.3.1

9. • wiki 600 module
• 20
•

10. • libev (event loop)
• libeio (nonblocked posix, thread pool)
• v8 (javascript engine by google)

11. •
•
•

12. io
io

13. io
io

14. -
•
•
•

15. -
• cpu
•

16. - Web Worker

17. • AMD Opteron 2200 , 4G RAM
• socket client 20,000+ qps
• socket server 17,000 qps
• http server 4,400 qps
• 30~40m
• see more. <http://nodejs.kongwu.net/blog/?
p=8>

18. • SSL
• Windows
• 1G (by v8)

19. • Web
•
• Spider

20. Digg in the node

21. $ git clone git://github.com/ry/node.git
$ cd node
$ ./configure --prefix=$HOME/node
$ make install

22. Hello World!
Familiar & Simple

23. $ node singleThread.js
1
2
3
4

24. CommonJS
$ node main.js
foobar

25. io
$ node nonblocking.js
Reading my.txt ...
my.txt
Here is contents in "my.txt".

26. HTTP

27. TCP
$ node tcpServer.js &
$ telnet locahost 1234
Welcome!
> Node is so Cooool.
Node is so Cooool.
>

28. $ node watchFile.js &
$ sleep 3; touch my.txt
the current mtime is: 1292594780000
the previous mtime was: 1292594752000

29. $ node childProcess.js
hello
world

30. String vs Buffer
String
•
• node v8 String ,
socket memcopy
• v8 gc

31. String vs Buffer
With String

32. String vs Buffer
With Buffer

33. With String

34. With Buffer

35. Want to see more?

36. • PHP: pear
• Python: PyPI, setuptools
• Ruby: Gems
• Node:

37. $ cat >>~/.npmrc <<NPMRC
root = ~/.node_libraries
binroot = ~/bin
manroot = ~/share/man
NPMRC
$ curl http://npmjs.org/install.sh | sh
$ npm ls
$ npm install package_name
$ npm update

38. IDE base on node
http://www.cloud9ide.com/

39. Links
• http://www.commonjs.org/
• http://nodejs.org/
• http://howtonode.org/
• https://github.com/ry/node/wiki
• https://github.com/ry/node/wiki/modules
• https://github.com/isaacs/npm