Web development with Lua Programming Language

Transcription

1 Web development with Lua Programming Language Introducing Sailor, a web MVC framework in Lua Etiene

2 Web development with Lua Programming Language Introducing Sailor, a web MVC framework in Lua Etiene

3 @etiene_d

4 Sailor!

5 Lua Ladies

6 Google Summer of Code LabLua

7

8 Advantages

9

10 better reasons It looks cool (I heard you could make games with it)

11 better reasons It looks cool (I heard you could make games with it) It s made in my home country (In my university to be more precise)

12 better reasons It looks cool (I heard you could make games with it) It s made in my home country (In my university to be more precise) It s easy to learn

13 ??????

14 Lua on the web Early stage cgilua ~ 1995 Kepler Project ~ 2003

15 I have myself developed Web sites with pure C++, Java, C#, PHP, and Python. The easiest way to go was definitely Python. If the libraries existed, Lua would be not quite as easy to use as Python, but probably quite a bit more efficient; I think it would become my first choice... if the libraries existed. Michael Gogins Recently there was some discussion about mod_lua on the Apache developers mailing list. I mentioned there that I feel Lua could replace PHP as the number one web scripting language if mod_lua were stable (i.e. not still in beta) and it were implemented well (not making some of PHP's mistakes such as putting everything in the global scope with no consistent naming or parameter schemes). I've wanted to use Lua for all the things I currently use PHP for ever since I discovered it. Rena

16

17

18

19

20

21 Why?

22

23 Servers Apache: mod_lua Nginx: OpenResty

24 Servers Apache: mod_lua Nginx: OpenResty

25 Servers Apache: mod_lua Nginx: OpenResty Xavante Others

26 Frameworks Orbit (2007) Least known No significant updates since 2010 MVC

27 Frameworks Orbit (2007) Least known No significant updates since 2010 MVC Luvit (2011) Most popular Intense development node.js port 2-4x faster

28 Frameworks Lapis (2012) Intense development Moonscript and Lua Very well documented Templater OpenResty only Not MVC

29 Frameworks Lapis (2012) Intense development Moonscript and Lua Very well documented Templater OpenResty only Not MVC Others Complicated, abandoned, poorly documented, license issues or I never heard about it...

30 Sailor!

31 Sailor!

32 Sailor!

33 Sailor! 0.1 (Venus) 0.2 (Mars)

34 What exactly is Sailor? It s an MVC web framework Completely written in Lua Compatible with Apache (mod_lua), Nginx (OpenResty), Mongoose, Xavante and Lwan Compatible with Linux, Windows and Mac Compatible with different databases MIT License Pre alpha v0.2 (Mars) 0.3 (Jupiter) will be released TODAY!

35

36 What (else) is cool about Sailor? Routing and friendly URLs Session, cookies, include, redirect Lua Pages parsing Mail sending Simple Object Relational-Mapping Validation (valua) Basic login and authentication modules Form generation Themes (Bootstrap integration out of the box) App generator (Linux and Mac only) Model and CRUD generator

37 What (else) is cool about Routing and friendly URLs Session, cookies, include, redirect Lua Pages parsing Mail sending Simple Object Relational-Mapping Validation (valua) Basic login and authentication modules Form generation Themes (Bootstrap integration out of the box) App generator (Linux and Mac only) Model and CRUD generator Lua at client Sailor?

38 Not so great things It s still in early development Things are changing fast It lacks features Documentation

39 How to get Sailor! $ luarocks install sailor $ sailor_create My App /var/www $ cd /var/www/my_app $ lua start-server.lua

40

41 How to get Sailor! $ luarocks install sailor $ sailor_create My App /var/www $ cd /var/www/my_app $ lua start-server.lua $ luarocks install luasql-mysql

42 /conf /controllers /models /pub /runtime /themes /views App structure

43 Example! -- /controllers/site.lua local site = {} function site.index(page) local msg = Hello World page:render( index, { msg = msg } ) end function site.notindex(page) page:write( I m different! ) end return site

44 Example! <!-- /views/site/index.lp --> <p> A message from the server: <?lua page:print(msg)?> <br/> The message again: <%= msg %> <!-- same thing as above > </p>

45 Example!

46 Example! -- Code here runs on the server?> <?lua -- Same as above?> -- Runs at the client?> -- Runs at the server and the client?> another_msg = Another message?> <?lua page:print(another_msg)?> <?lua@client js.window.alert(another_msg)?>

47 Example!

48 Example! local user = {} local v = require valua -- validation module user.attributes = { } { id = safe }, { name = v:new().not_empty() } user.db = { key = id, table = users } user.relations = { } posts = { -- u.posts } relation = HAS_MANY, model = post, attribute = author_id return user

49 Example! -- /controllers/site.lua local site = {} function site.index(page) local User = sailor.model( user ) local u = User:new() u.name = Arnold local msg if u:save() then msg = Success else msg = table.unpack(u.errors) end local users = User:find_all() page:render( index, { msg = msg, users = users } ) end return site

50 sailorproject.org

51 Example!

52 sailorproject.org