Web development with Lua and Sailor @ GeeCon 2015

Web development with Lua
Programming Language
Introducing Sailor, a web MVC framework in Lua
Etiene Dalcol
@etiene_d

Sailor! 
http://sailorproject.org
Web development with Lua @ GeeCON 2015 @etiene_d

Lua Ladies 
http://lualadies.org

Google Summer of Code
LabLua

Advantages

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

better reasons
• It looks cool
• It’s made in my home country
(In my university to be more precise)

better reasons
• It looks cool
• It’s made in my home country
(In my university to be more precise)
• It’s easy to learn

?
?
?
?
?
?Web development with Lua @ GeeCON 2015 @etiene_d

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

“ 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

Web development with Lua @etiene_d

Why?

Servers
• Apache: mod_lua
• Nginx: OpenResty

Servers
• Apache: mod_lua

Servers
• Apache: mod_lua
• Xavante
• Others

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

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

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

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...

Sailor!

Sailor!
0.1
(Venus)
0.2
(Mars)

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!

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

• 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
What (else) is cool about Sailor?

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

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

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-mysqlOptional

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

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

Example!

<p>
A message from the server:
<?lua page:print(msg) ?>
<br/>
The message again:
<%= msg %> <!-- same thing as above —>
</p>

Example!

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

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

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

sailorproject.org
github.com/Etiene/sailor
dalcol@etiene.net
@etiene_d

Web development with Lua and Sailor @ GeeCon 2015

Recommandé

Recommandé

Contenu connexe

Tendances

Tendances (20)

En vedette

En vedette (10)

Similaire à Web development with Lua and Sailor @ GeeCon 2015

Similaire à Web development with Lua and Sailor @ GeeCon 2015 (20)

Plus de Etiene Dalcol

Plus de Etiene Dalcol (7)

Dernier

Dernier (20)

Web development with Lua and Sailor @ GeeCon 2015