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1 | package Catalyst; |
2 | |
3 | use strict; |
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4 | use base 'Catalyst::Base'; |
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5 | use UNIVERSAL::require; |
6 | use Catalyst::Log; |
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7 | use Text::ASCIITable; |
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8 | use Text::ASCIITable::Wrap 'wrap'; |
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9 | |
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10 | __PACKAGE__->mk_classdata($_) for qw/engine log/; |
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11 | |
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12 | our $VERSION = '5.00'; |
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13 | our @ISA; |
14 | |
15 | =head1 NAME |
16 | |
17 | Catalyst - The Elegant MVC Web Application Framework |
18 | |
19 | =head1 SYNOPSIS |
20 | |
21 | # use the helper to start a new application |
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22 | catalyst.pl MyApp |
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23 | cd MyApp |
24 | |
25 | # add models, views, controllers |
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26 | script/create.pl model Something |
27 | script/create.pl view Stuff |
28 | script/create.pl controller Yada |
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29 | |
30 | # built in testserver |
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31 | script/server.pl |
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32 | |
33 | # command line interface |
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34 | script/test.pl /yada |
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35 | |
36 | |
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37 | use Catalyst; |
38 | |
39 | use Catalyst qw/My::Module My::OtherModule/; |
40 | |
41 | use Catalyst '-Debug'; |
42 | |
43 | use Catalyst qw/-Debug -Engine=CGI/; |
44 | |
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45 | sub default : Private { $_[1]->res->output('Hello') } ); |
46 | |
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47 | sub index : Path('/index.html') { |
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48 | my ( $self, $c ) = @_; |
49 | $c->res->output('Hello'); |
50 | $c->forward('_foo'); |
51 | } |
52 | |
53 | sub product : Regex('/^product[_]*(\d*).html$/') { |
54 | my ( $self, $c ) = @_; |
55 | $c->stash->{template} = 'product.tt'; |
56 | $c->stash->{product} = $c->req->snippets->[0]; |
57 | } |
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58 | |
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59 | See also L<Catalyst::Manual::Intro> |
60 | |
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61 | =head1 DESCRIPTION |
62 | |
63 | Catalyst is based upon L<Maypole>, which you should consider for smaller |
64 | projects. |
65 | |
66 | The key concept of Catalyst is DRY (Don't Repeat Yourself). |
67 | |
68 | See L<Catalyst::Manual> for more documentation. |
69 | |
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70 | Catalyst plugins can be loaded by naming them as arguments to the "use Catalyst" statement. |
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71 | Omit the C<Catalyst::Plugin::> prefix from the plugin name, |
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72 | so C<Catalyst::Plugin::My::Module> becomes C<My::Module>. |
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73 | |
74 | use Catalyst 'My::Module'; |
75 | |
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76 | Special flags like -Debug and -Engine can also be specifed as arguments when |
77 | Catalyst is loaded: |
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78 | |
79 | use Catalyst qw/-Debug My::Module/; |
80 | |
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81 | The position of plugins and flags in the chain is important, because they are |
82 | loaded in exactly the order that they appear. |
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83 | |
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84 | The following flags are supported: |
85 | |
86 | =over 4 |
87 | |
88 | =item -Debug |
89 | |
90 | enables debug output, i.e.: |
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91 | |
92 | use Catalyst '-Debug'; |
93 | |
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94 | this is equivalent to: |
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95 | |
96 | use Catalyst; |
97 | sub debug { 1 } |
98 | |
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99 | =item -Engine |
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100 | |
101 | Force Catalyst to use a specific engine. |
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102 | Omit the C<Catalyst::Engine::> prefix of the engine name, i.e.: |
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103 | |
104 | use Catalyst '-Engine=CGI'; |
105 | |
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106 | =back |
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107 | |
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108 | =head1 METHODS |
109 | |
110 | =over 4 |
111 | |
112 | =item debug |
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113 | |
114 | Overload to enable debug messages. |
115 | |
116 | =cut |
117 | |
118 | sub debug { 0 } |
119 | |
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120 | =item config |
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121 | |
122 | Returns a hashref containing your applications settings. |
123 | |
124 | =cut |
125 | |
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126 | sub import { |
127 | my ( $self, @options ) = @_; |
128 | my $caller = caller(0); |
129 | |
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130 | unless ( $caller->isa($self) ) { |
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131 | no strict 'refs'; |
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132 | push @{"$caller\::ISA"}, $self; |
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133 | } |
134 | |
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135 | if ( $caller->engine ) { |
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136 | return; # Catalyst is allready initialized |
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137 | } |
138 | |
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139 | unless ( $caller->log ) { |
140 | $caller->log( Catalyst::Log->new ); |
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141 | } |
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142 | |
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143 | if ( $ENV{CATALYST_DEBUG} || $ENV{ uc($caller) . '_DEBUG' } ) { |
144 | no strict 'refs'; |
145 | *{"$caller\::debug"} = sub { 1 }; |
146 | $caller->log->debug('Debug messages enabled'); |
147 | } |
148 | |
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149 | my $engine = 'Catalyst::Engine::CGI'; |
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150 | |
151 | if ( $ENV{MOD_PERL} ) { |
152 | |
153 | require mod_perl; |
154 | |
155 | if ( $mod_perl::VERSION >= 1.99 ) { |
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156 | $engine = 'Catalyst::Engine::Apache::MP2'; |
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157 | } |
158 | else { |
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159 | $engine = 'Catalyst::Engine::Apache::MP1'; |
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160 | } |
161 | } |
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162 | |
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163 | my @plugins; |
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164 | foreach (@options) { |
165 | if (/^\-Debug$/) { |
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166 | next if $caller->debug; |
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167 | no strict 'refs'; |
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168 | *{"$caller\::debug"} = sub { 1 }; |
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169 | $caller->log->debug('Debug messages enabled'); |
170 | } |
171 | elsif (/^-Engine=(.*)$/) { $engine = "Catalyst::Engine::$1" } |
172 | elsif (/^-.*$/) { $caller->log->error(qq/Unknown flag "$_"/) } |
173 | else { |
174 | my $plugin = "Catalyst::Plugin::$_"; |
175 | |
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176 | $plugin->require; |
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177 | |
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178 | if ($@) { |
179 | $caller->log->error(qq/Couldn't load plugin "$plugin", "$@"/); |
180 | } |
181 | else { |
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182 | push @plugins, $plugin; |
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183 | no strict 'refs'; |
184 | push @{"$caller\::ISA"}, $plugin; |
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185 | } |
186 | } |
187 | } |
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188 | my $t = Text::ASCIITable->new( { hide_HeadRow => 1, hide_HeadLine => 1 } ); |
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189 | $t->setCols('Class'); |
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190 | $t->setColWidth( 'Class', 75, 1 ); |
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191 | $t->addRow( wrap( $_, 75 ) ) for @plugins; |
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192 | $caller->log->debug( 'Loaded plugins', $t->draw ) |
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193 | if ( @plugins && $caller->debug ); |
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194 | |
195 | # Engine |
196 | $engine = "Catalyst::Engine::$ENV{CATALYST_ENGINE}" |
197 | if $ENV{CATALYST_ENGINE}; |
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198 | |
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199 | $engine->require; |
200 | die qq/Couldn't load engine "$engine", "$@"/ if $@; |
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201 | { |
202 | no strict 'refs'; |
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203 | push @{"$caller\::ISA"}, $engine; |
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204 | } |
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205 | $caller->engine($engine); |
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206 | $caller->log->debug(qq/Loaded engine "$engine"/) if $caller->debug; |
207 | } |
208 | |
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209 | =item $c->engine |
210 | |
211 | Contains the engine class. |
212 | |
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213 | =item $c->log |
214 | |
215 | Contains the logging object. Unless it is already set Catalyst sets this up with a |
216 | C<Catalyst::Log> object. To use your own log class: |
217 | |
218 | $c->log( MyLogger->new ); |
219 | $c->log->info("now logging with my own logger!"); |
220 | |
221 | Your log class should implement the methods described in the C<Catalyst::Log> |
222 | man page. |
223 | |
224 | |
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225 | =back |
226 | |
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227 | =head1 SUPPORT |
228 | |
229 | IRC: |
230 | |
231 | Join #catalyst on irc.perl.org. |
232 | |
233 | Mailing-Lists: |
234 | |
235 | http://lists.rawmode.org/mailman/listinfo/catalyst |
236 | http://lists.rawmode.org/mailman/listinfo/catalyst-dev |
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237 | |
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238 | =head1 SEE ALSO |
239 | |
240 | L<Catalyst::Manual>, L<Catalyst::Test>, L<Catalyst::Request>, |
241 | L<Catalyst::Response>, L<Catalyst::Engine> |
242 | |
243 | =head1 AUTHOR |
244 | |
245 | Sebastian Riedel, C<sri@oook.de> |
246 | |
247 | =head1 THANK YOU |
248 | |
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249 | Andrew Ford, Andrew Ruthven, Christian Hansen, Christopher Hicks, |
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250 | Dan Sully, Danijel Milicevic, David Naughton, Gary Ashton Jones, |
251 | Jesse Sheidlower, Johan Lindstrom, Marcus Ramberg, Tatsuhiko Miyagawa |
252 | and all the others who've helped. |
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253 | |
254 | =head1 LICENSE |
255 | |
256 | This library is free software . You can redistribute it and/or modify it under |
257 | the same terms as perl itself. |
258 | |
259 | =cut |
260 | |
261 | 1; |