HTML::Mason by example BPW2007 chrisv.cpan.org 1 Saturday 27 October 2007
HTML::Mason by example
Dec 18, 2014
Mason is a powerful, robust and proven templating system for serving dynamic content on the Web. Mason is most commonly used to build dynamically generated web sites but can also be used for more utility- and sysadmin-related tasks.
Talk given at Belgian Perl Workshop 2007 (27 Nov 2007)
Talk given at Belgian Perl Workshop 2007 (27 Nov 2007)
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
HTML::Masonby example
BPW2007chrisv.cpan.org
1Saturday 27 October 2007
embed perl in text(and then some)
2Saturday 27 October 2007
“alternatives”
• Text::Template & HTML::Template
• Template Toolkit
• Apache::ASP
• Embperl
• PHP
• ASP (ActiveState ActivePerl)
3Saturday 27 October 2007
building largedynamic websites
4Saturday 27 October 2007
• Amazon
• IMDB
• del.icio.us
• DynDNS
• jobs.perl.org
• RT
5Saturday 27 October 2007
Apache + mod_perlApache2 + mod_perl2
6Saturday 27 October 2007
httpd.conf
#PerlModule Apache2::CompatPerlModule HTML::Mason::ApacheHandler<LocationMatch "\.html$"> SetHandler perl-script PerlHandler HTML::Mason::ApacheHandler</LocationMatch>
7Saturday 27 October 2007
preload perl modulesstartup.pl
8Saturday 27 October 2007
Apache integration(objects)
9Saturday 27 October 2007
by example
10Saturday 27 October 2007
sample “component”
% my $planet = "World";Hello, <% $planet %>!
11Saturday 27 October 2007
output
Hello, World!
12Saturday 27 October 2007
Greetings, <% ("Earthlings", "Martians")[rand 2] %>
13Saturday 27 October 2007
in-line perl sections<%perl>
my $noun = 'World'; my @time = localtime;</%perl>Hello <% $noun %>,% if ( $time[2] < 12 ) {good morning.% } else {good afternoon.% }
14Saturday 27 October 2007
Mason pushes the boundaries of the term “Templating System”
15Saturday 27 October 2007
“components”:modular design
elements
16Saturday 27 October 2007
header.mas<html>
<head><title>Welcome to Wally World!</title></head><body bgcolor="#CCFFCC">
17Saturday 27 October 2007
footer.mas<center><a href="/">Home</a>
</center></body></html>
18Saturday 27 October 2007
mainpage.html<& header.mas &>
this is body text...
<& footer.mas &>
19Saturday 27 October 2007
mainpage.html<& header.mas, head => "Wally World Home" &>
this is body text...
<& footer.mas &>
20Saturday 27 October 2007
header.mas<%args>
$head</%args><html><head><title><% $head %></title></head><body bgcolor="#CCFFCC"><center><h1><% $head %></h1></center>
21Saturday 27 October 2007
autohandler<html>
<head> <title><% $m->base_comp->attr('head') %></title></head><body bgcolor="#CCFFCC"><center><h1><% $m->base_comp->attr('head') %></h1></center>% $m->call_next;<center><a href="/">Home</a></center></body></html>
22Saturday 27 October 2007
mainpage.html<%attr>
head => "Wally World Home"</%attr>this is body text...
23Saturday 27 October 2007
dhandlerse.g. http://myserver/newsfeeds/LocalNews/Story1
/newsfeeds/LocalNews/Story1 => no such thing/newsfeeds/LocalNews/dhandler => no such thing/newsfeeds/dhandler => found! (search ends)/dhandler
(The found dhandler would read “LocalNews/Story1” from $m->dhandler_arg and use it as a retrieval key into a database of stories)
24Saturday 27 October 2007
components ~ subs<%init>
my $ua = $r->header_in('User-Agent'); return ($ua =~ /Mozilla/i && $ua !~ /MSIE/i) ? 1 : 0;</%init>
25Saturday 27 October 2007
dhandlers vs autohandlers
• use an autohandler when you have a set of components to handle your pages and you want to augment them with a template/filter
• use a dhandler when you want to create a set of “virtual URLs” that don't correspond to any actual components, or to provide default behavior for a directory
26Saturday 27 October 2007
Mason Request ObjectsTwo global per-request objects are available to all components: $r (provides a Perl API to current Apache request) and $m (provides a Perl API to current Mason request)
$r->uri # the HTTP request URI$r->content_type # set or retrieve content-type
$m->caller() # returns the calling component$m->dhandler_arg() # returns url parts$m->redirect(URL, [HTTP status])
27Saturday 27 October 2007
thank you
30Saturday 27 October 2007
Related Documents
