From m at mikegrb.pm  Mon Jul 16 11:03:20 2012
From: m at mikegrb.pm (Michael Greb)
Date: Mon, 16 Jul 2012 14:03:20 -0400
Subject: [AC::PM] Reminder: Meeting Thursday July 19, 7pm
Message-ID: <CAA+MAx0_Cv_ozBGC124ny3yatPBX86gJ5sN5Ee9roL_AxJCGFQ@mail.gmail.com>

Our next meeting will be this Thursday, July 19th at 7pm.

The topic is Mojolicious for HTTP client applications.

Mojolicious is a Perl web framework but also includes many useful
tools for HTTP clients both in scripts and from the command line.

The meeting will be at the usual place, the conference room at the
Linode offices:
329 E Jimmy Leeds Rd,
Galloway NJ, 08205
http://goo.gl/maps/kY1M

From m at mikegrb.pm  Thu Jul 19 16:47:17 2012
From: m at mikegrb.pm (Michael Greb)
Date: Thu, 19 Jul 2012 19:47:17 -0400
Subject: [AC::PM] Mojolicious::UserAgent Slides
Message-ID: <CAA+MAx088NQUjTkLMDBmq48N1Zq8=e4RAHsuF0NJsGpHE02p+w@mail.gmail.com>

Hey guys, I didn't forget to send my slides this time!

# This is a sample Vroom input file. It should help you get started.
#
# Edit this file with your content. Then run `vroom --vroom` to start
# the show!
#
# See `perldoc Vroom` for complete details.
#
---- config
# Basic config options.
title: mojolicious the client strikes back
indent: 5
#height: 18
#width: 69
auto_size: 1
skip: 0

# The following options are for Gvim usage.
# vim: mvim
# gvimrc: |
#   set fuopt=maxhorz,maxvert
#   set guioptions=egmLtT
#   set guifont=Bitstream_Vera_Sans_Mono:h18
#   set guicursor=a:blinkon0-ver25-Cursor
#   colorscheme default

---- center
mojolicious
the client strikes back

by @mikegrb

----
== mojolicious

* A next generation web framework for the Perl programming language.
* The web, in a box
  * zero dependencies
  * JSON encoder/decoder
  * HTTP Client

----
== Mojo::UserAgent
* HTTP Client with mojolicious's everything included approach
* DOM parser w/ CSS Selectors
* JSON decoder

----
== A quick diversion

CSS Selectors

In CSS, pattern matching rules determine which style
rules apply to elements in the document tree. These
patterns, called selectors, may range from simple
element names to rich contextual patterns.

----
== Groking CSS Selectors

* http://net.tutsplus.com/tutorials/html-css-techniques/the-30-css-selectors-you-must-memorize/
  * http://j.mp/LyrUhB
* http://www.selectorgadget.com/

----
== Select by ID

* '#X'
* <div id="x">

----
== Select by Class

* '.x'
* <div class="x">

----
== Select by Tag
* 'x'
* <x>urmom</x>

----
== Descendant
* x y
* <x>
    <y></y>
  </x>

---- perl
use 5.010;
use Mojo::UserAgent;

my $ua = Mojo::UserAgent->new(max_redirects => 5);
say $ua->get("metacpan.org/module/Vroom")
    ->res()
    ->dom("#index a")
    ->pluck("text")
    ->map(sub{ return ucfirst(lc(shift)) } )
    ->join("\n");

----
== JSON

* pretty popular for webservice APIs these days
* mojo has your back

---- perl
use 5.010;
use Mojo::UserAgent;
binmode STDOUT, ':utf8';

my $ua = Mojo::UserAgent->new();
my $t = $ua->get("search.twitter.com/search.json?q=perl")
    ->res()->json->{results};
say join "\n\n",
    map { "\@$_->{from_user} $_->{text}" }
    @$t[0 .. 4];

----
== Debugging Mojo::UserAgent

Really easy, set MOJO_USERAGENT_DEBUG=1:

$ MOJO_USERAGENT_DEBUG=1 ./myscript.pl

----
== CLI?

This stuff is sweet, I could use it from CLI
all the time!
----
== mojo's got your back
ojo.pm
Let's you do:

$ perl -Mojo -E ...

---- shell
perl -Mojo -E 'say g("metacpan.org/search?q=mojo")->dom("big
a")->pluck("text")->join("\n")'

----
== it get's better!
* if you act now, mojo(1) will be included
  at no extra charge

---- shell
mojo get -r  'metacpan.org/search?q=mojo' 'big a' text

---- shell
mojo get www.linode.com 'head > title' text

---- shell
mojo get -r metacpan.org/module/Vroom '#index a' text

From stan at schwertly.com  Sat Jul 21 12:37:27 2012
From: stan at schwertly.com (Stan)
Date: Sat, 21 Jul 2012 15:37:27 -0400
Subject: [AC::PM] Mojolicious::UserAgent Slides
In-Reply-To: <CAA+MAx088NQUjTkLMDBmq48N1Zq8=e4RAHsuF0NJsGpHE02p+w@mail.gmail.com>
References: <CAA+MAx088NQUjTkLMDBmq48N1Zq8=e4RAHsuF0NJsGpHE02p+w@mail.gmail.com>
Message-ID: <2C5899E2-8265-4E14-8BEC-920879F18EED@schwertly.com>

On Jul 19, 2012, at 7:47 PM, Michael Greb wrote:

> Hey guys, I didn't forget to send my slides this time!

Thanks Mike! I actually just had to use the binmode trick. Also, if you're as slow as I am, you'll want to make sure your version of Mojolicious is up to date. I had 2.95 and the 'pluck' command wasn't working for me. It was added in v3.02, which was released just this month! (2012-07-03).

Stan