From 63f413891d5adc596e4d51dfba4d0d23fdea3ca4 Mon Sep 17 00:00:00 2001 From: Franck Cuny Date: Sun, 31 Jul 2016 10:16:40 -0700 Subject: Stop generating a static site. --- ...o-write-a-nice-webapp-in-less-than-two-hours.md | 102 --------------------- 1 file changed, 102 deletions(-) delete mode 100644 content/post/2009-12-21-tatsumaki-or-how-to-write-a-nice-webapp-in-less-than-two-hours.md (limited to 'content/post/2009-12-21-tatsumaki-or-how-to-write-a-nice-webapp-in-less-than-two-hours.md') diff --git a/content/post/2009-12-21-tatsumaki-or-how-to-write-a-nice-webapp-in-less-than-two-hours.md b/content/post/2009-12-21-tatsumaki-or-how-to-write-a-nice-webapp-in-less-than-two-hours.md deleted file mode 100644 index c1d6a83..0000000 --- a/content/post/2009-12-21-tatsumaki-or-how-to-write-a-nice-webapp-in-less-than-two-hours.md +++ /dev/null @@ -1,102 +0,0 @@ ---- -date: 2009-12-21T00:00:00Z -summary: In which I write about Tatsumaki. -title: Tatsumaki, or how to write a nice webapp in less than two hours ---- - -Until today, I had a script named "lifestream.pl". This script was triggered via cron once every hour, to fetch various feeds from services I use (like github, identi.ca, ...) and to process the result through a template and dump the result in a HTML file. - -Today I was reading Tatsumaki's code and some examples (Social and Subfeedr). Tatsumaki is a "port" tornado (a non blocking server in Python), based on Plack and AnyEvent. I though that using this to replace my old lifestream script would be a good way to test it. Two hours later I have a complete webapp that works (and the code is available here). - -The code is really simple: first, I define an handler for my HTTP request. As I have only one things to do (display entries), the handler is really simple: - -```perl -package Lifestream::Handler; -use Moose; -extends 'Tatsumaki::Handler'; - -sub get { - my $self = shift; - my %params = %{$self->request->params}; - $self->render( - 'lifestream.html', - { memes => $self->application->memes($params{page}), - services => $self->application->services - } - ); -} -1; -``` - -For all the get request, 2 methods are called : memes and services. The memes get a list of memes to display on the page. The services get the list of the various services I use (to display them on a sidebar). - -Now, as I don't want to have anymore my lifestream.pl script in cron, I will let Tatsumaki do the polling. For this, I add a service to my app, which is just a worker. - -```perl -package Lifestream::Worker; -use Moose; -extends 'Tatsumaki::Service'; -use Tatsumaki::HTTPClient; - -sub start { - my $self = shift; - my $t; - $t = AE::timer 0, 1800, sub { - scalar $t; - $self->fetch_feeds; - }; -} - -sub fetch_feeds { - my ($self, $url) = @_; - Tatsumaki::HTTPClient->new->get( - $url, - sub { - #do the fetch and parsing stuff - } - ); -} -``` - -From now, every 60 minutes, feeds will be checked. Tatsumaki::HTTPClient is a HTTP client based on AnyEvent::HTTP. - -Let's write the app now - -```perl -package Lifestream; - -use Moose; -extends "Tatsumaki::Application"; - -use Lifestream::Handler; -use Lifestream::Worker; - -sub app { - my ($class, %args) = @_; - my $self = $class->new(['/' => 'Lifestream::Handler',]); - $self->config($args{config}); - $self->add_service(Lifestream::Worker->new(config => $self->config)); - $self; -} - -sub memes { -} - -sub services { -} -``` - -The memes and services method called from the handler are defined here. In the app method, I "attch" the "/" path to the handler, and I add the service. - -and to launch the app - -```perl -my $app = Lifestream->app(config => LoadFile($config)); -require Tatsumaki::Server; -Tatsumaki::Server->new( - port => 9999, - host => 0, -)->run($app); -``` - -And that's it, I now have a nice webapp, with something like only 200 LOC. I will keep playing with Tatsumaki as I have more ideas (and probably subfeedr too). Thanks to miyagawa for all this code. -- cgit v1.2.3