1.
Mojo as a HTTP
A new beginning

2.
I am Marcus
I work here

3.
In the beginning
there was LWP

4.
First Changelog Entry:
Thu 18 May 1995 Martijn Koster
<m.koster@nexor.co.uk>
o Mentioned on libwww-perl that I had
changed the classes around lots.

5.
Became wildly popular,
default choice for
HTTP in Perl.

6.
Starting to
show it’s age

7.
Clunky API
No Async
No Web Socket
...

8.
The time is ripe for
a new beginning.

9.
perl -Mojo -e'
g("vg.no/")
->dom(".article-content h3
a")
->each(sub {
b(shift->text)
->decode->say })'

10.
Actually, it didn’t
happen just like that.

11.
Sebastian Riedel
@kraih

12.
Took over Maypole.
Wanted to make
radical changes

13.
Got
Booted

14.
Created Catalyst.
Wanted to make
radical changes

15.
Got
Booted

16.
Made Mojolicious.
Wanted to target
PHP developers & Perl
6

17.
Ease of install/porting
➜
Only Perl5 core
dependencies

18.
Bootstrapping:
curl -L cpanmin.us |
sudo perl - Mojolicious

19.
Wrote an async
HTTP 1.1
compliant stack

20.
Mojo::Transaction
Mojo::Message::Response
Mojo::Cookie
Mojo::URL
+++

21.
Test Driven
Development

22.
RFC Driven
Development

23.
PRAGMATIC

24.
Next logical step:
Add a client on top of
this stack.

25.
Mojo == Lego
Built from reusable
bricks.

26.
Parallel
requests

27.
my $callback = sub {
print shift−>res−>body
};
$client−>get('http://mojolicious.org' =>
$callback);
$client−>get('http://search.cpan.org' =>
$callback);
$client−>start;

28.
Form Handling

29.
# Form post with exception handling
my $cpan = 'http://search.cpan.org/search';
my $search = {q => 'mojo'};
my $tx = $client−>post_form($cpan => $search);
if (my $res = $tx−>success) {
print $res−>body
} else {
my ($message, $code) = $tx−>error;
print "Error: $message";
}

30.
Web Sockets

31.
$client−>websocket(
'ws://websockets.org:8787' =>
sub {
my $client = shift;
$client−>on_message( sub {
my ($client, $message) = @_;
print "$messagen";
$client−>finish;
});
$client−>send_message('hiya!');
})−>start;

32.
Oneliners

33.
Collection of single
letter commands.

34.
g ➜ get
d ➜ delete
f ➜ form post
p ➜ post
u ➜ put
w ➜ websocket

35.
Special Cases
b ➜ byte stream,
a ➜ Lite app

36.
#ojo module
my $res = g( 'http://mojolicio.us',
{'Content−Type' => 'text/plain'},
'Hello!' );
perl -Mojo -e 'b(g("mojolicio.us")->dom->at("title")->text)->say'
perl -Mojo -E'g("bloomberg.com")->dom("a.story_link")->each(sub { say
shift->text; })'
perl -Mojo -E'g("digg.com")->dom("a.story-title")->each(sub { say pop, ". ",
shift->text })'
# Undocumented o(fun) Mojolicious cloud function:
perl -Mojo -e 'oO("http://www.reddit.com")->dom->find("a.title")-
>each(sub { Oo(pop . ". " . shift->text)->say })'

37.
Mojo::DOM

38.
Liberal XML Parser

39.
Supports all CSS3
selectors that
make sense

40.
*
E[foo=”bar”]
E:checked
E:empty
E:nth-child
E:first-of-type
E:not(s)
EF
E>F
++++

41.
o(fun)
If you need performance
use libXML

42.
SOME RANDOM
BITS

43.
Supports IPV6,
TLS,proxies, epoll,
kqueue

44.
DEBUG MODE
ENV VARIABLE
MOJO_CLIENT_DEBUG=1
perl -Mojo -E’...’

45.
# Streaming response
my $tx = $client−>build_tx(GET =>
'http://mojolicious.org');
$tx−>res−>body(sub { print $_[1] });
$client−>start($tx);
# Custom socket
my $tx = $client−>build_tx(GET =>
'http://mojolicious.org');
$tx−>connection($socket);
$client−>start($tx);

46.
Big Body
Just Works
(temp storage on
filesystem)

47.
$res->json
Automatic JSON
deserialization

48.
o(fun)
Every file in the distro
has a Simpsons or
Futurama quote.

49.
Now also handles
disconnected keep-alive
gracefully.
(this was not the case when
we started using it).

50.
Test Driven
Development

51.
You provide
failing test. kraih
provides fix.

52.
Learn More Mojo
mojolicious.org
github.com/kraih/mojo
#mojo on irc.perl.org
groups.google.com/group/mojolicious