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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 Catalyst::Utils; |
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8 | use Text::ASCIITable; |
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9 | use Path::Class; |
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10 | our $CATALYST_SCRIPT_GEN = 4; |
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11 | |
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12 | __PACKAGE__->mk_classdata($_) for qw/dispatcher engine log/; |
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13 | |
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14 | our $VERSION = '5.20'; |
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15 | our @ISA; |
16 | |
17 | =head1 NAME |
18 | |
19 | Catalyst - The Elegant MVC Web Application Framework |
20 | |
21 | =head1 SYNOPSIS |
22 | |
23 | # use the helper to start a new application |
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24 | catalyst.pl MyApp |
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25 | cd MyApp |
26 | |
27 | # add models, views, controllers |
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28 | script/create.pl model Something |
29 | script/create.pl view Stuff |
30 | script/create.pl controller Yada |
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31 | |
32 | # built in testserver |
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33 | script/server.pl |
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34 | |
35 | # command line interface |
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36 | script/test.pl /yada |
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37 | |
38 | |
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39 | use Catalyst; |
40 | |
41 | use Catalyst qw/My::Module My::OtherModule/; |
42 | |
43 | use Catalyst '-Debug'; |
44 | |
45 | use Catalyst qw/-Debug -Engine=CGI/; |
46 | |
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47 | sub default : Private { $_[1]->res->output('Hello') } ); |
48 | |
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49 | sub index : Path('/index.html') { |
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50 | my ( $self, $c ) = @_; |
51 | $c->res->output('Hello'); |
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52 | $c->forward('foo'); |
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53 | } |
54 | |
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55 | sub product : Regex('^product[_]*(\d*).html$') { |
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56 | my ( $self, $c ) = @_; |
57 | $c->stash->{template} = 'product.tt'; |
58 | $c->stash->{product} = $c->req->snippets->[0]; |
59 | } |
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60 | |
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61 | See also L<Catalyst::Manual::Intro> |
62 | |
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63 | =head1 DESCRIPTION |
64 | |
65 | Catalyst is based upon L<Maypole>, which you should consider for smaller |
66 | projects. |
67 | |
68 | The key concept of Catalyst is DRY (Don't Repeat Yourself). |
69 | |
70 | See L<Catalyst::Manual> for more documentation. |
71 | |
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72 | Catalyst plugins can be loaded by naming them as arguments to the "use Catalyst" statement. |
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73 | Omit the C<Catalyst::Plugin::> prefix from the plugin name, |
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74 | so C<Catalyst::Plugin::My::Module> becomes C<My::Module>. |
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75 | |
76 | use Catalyst 'My::Module'; |
77 | |
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78 | Special flags like -Debug and -Engine can also be specifed as arguments when |
79 | Catalyst is loaded: |
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80 | |
81 | use Catalyst qw/-Debug My::Module/; |
82 | |
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83 | The position of plugins and flags in the chain is important, because they are |
84 | loaded in exactly the order that they appear. |
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85 | |
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86 | The following flags are supported: |
87 | |
88 | =over 4 |
89 | |
90 | =item -Debug |
91 | |
92 | enables debug output, i.e.: |
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93 | |
94 | use Catalyst '-Debug'; |
95 | |
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96 | this is equivalent to: |
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97 | |
98 | use Catalyst; |
99 | sub debug { 1 } |
100 | |
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101 | =item -Engine |
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102 | |
103 | Force Catalyst to use a specific engine. |
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104 | Omit the C<Catalyst::Engine::> prefix of the engine name, i.e.: |
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105 | |
106 | use Catalyst '-Engine=CGI'; |
107 | |
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108 | =back |
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109 | |
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110 | =head1 METHODS |
111 | |
112 | =over 4 |
113 | |
114 | =item debug |
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115 | |
116 | Overload to enable debug messages. |
117 | |
118 | =cut |
119 | |
120 | sub debug { 0 } |
121 | |
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122 | =item config |
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123 | |
124 | Returns a hashref containing your applications settings. |
125 | |
126 | =cut |
127 | |
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128 | sub import { |
129 | my ( $self, @options ) = @_; |
130 | my $caller = caller(0); |
131 | |
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132 | # Prepare inheritance |
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133 | unless ( $caller->isa($self) ) { |
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134 | no strict 'refs'; |
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135 | push @{"$caller\::ISA"}, $self; |
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136 | } |
137 | |
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138 | if ( $caller->engine ) { |
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139 | return; # Catalyst is already initialized |
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140 | } |
141 | |
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142 | unless ( $caller->log ) { |
143 | $caller->log( Catalyst::Log->new ); |
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144 | } |
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145 | |
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146 | # Debug? |
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147 | if ( $ENV{CATALYST_DEBUG} || $ENV{ uc($caller) . '_DEBUG' } ) { |
148 | no strict 'refs'; |
149 | *{"$caller\::debug"} = sub { 1 }; |
150 | $caller->log->debug('Debug messages enabled'); |
151 | } |
152 | |
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153 | my $engine = 'Catalyst::Engine::CGI'; |
154 | my $dispatcher = 'Catalyst::Dispatcher'; |
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155 | |
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156 | # Detect mod_perl |
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157 | if ( $ENV{MOD_PERL} ) { |
158 | |
159 | require mod_perl; |
160 | |
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161 | if ( $ENV{MOD_PERL_API_VERSION} == 2 ) { |
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162 | $engine = 'Catalyst::Engine::Apache::MP20'; |
163 | } |
164 | elsif ( $mod_perl::VERSION >= 1.99 ) { |
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165 | $engine = 'Catalyst::Engine::Apache::MP19'; |
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166 | } |
167 | else { |
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168 | $engine = 'Catalyst::Engine::Apache::MP13'; |
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169 | } |
170 | } |
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171 | |
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172 | $caller->log->info( "You are running an old helper script! " |
173 | . "Please update your scripts by regenerating the " |
174 | . "application and copying over the new scripts." ) |
175 | if ( $ENV{CATALYST_SCRIPT_GEN} |
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176 | && ( $ENV{CATALYST_SCRIPT_GEN} < $CATALYST_SCRIPT_GEN ) ); |
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177 | |
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178 | # Process options |
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179 | my @plugins; |
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180 | foreach (@options) { |
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181 | |
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182 | if (/^\-Debug$/) { |
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183 | next if $caller->debug; |
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184 | no strict 'refs'; |
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185 | *{"$caller\::debug"} = sub { 1 }; |
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186 | $caller->log->debug('Debug messages enabled'); |
187 | } |
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188 | |
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189 | elsif (/^-Dispatcher=(.*)$/) { |
190 | $dispatcher = "Catalyst::Dispatcher::$1"; |
191 | } |
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192 | |
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193 | elsif (/^-Engine=(.*)$/) { $engine = "Catalyst::Engine::$1" } |
194 | elsif (/^-.*$/) { $caller->log->error(qq/Unknown flag "$_"/) } |
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195 | |
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196 | else { |
197 | my $plugin = "Catalyst::Plugin::$_"; |
198 | |
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199 | $plugin->require; |
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200 | |
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201 | if ($@) { die qq/Couldn't load plugin "$plugin", "$@"/ } |
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202 | else { |
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203 | push @plugins, $plugin; |
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204 | no strict 'refs'; |
205 | push @{"$caller\::ISA"}, $plugin; |
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206 | } |
207 | } |
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208 | |
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209 | } |
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210 | |
211 | # Plugin table |
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212 | my $t = Text::ASCIITable->new( { hide_HeadRow => 1, hide_HeadLine => 1 } ); |
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213 | $t->setCols('Class'); |
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214 | $t->setColWidth( 'Class', 75, 1 ); |
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215 | $t->addRow($_) for @plugins; |
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216 | $caller->log->debug( 'Loaded plugins', $t->draw ) |
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217 | if ( @plugins && $caller->debug ); |
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218 | |
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219 | # Dispatcher |
220 | $dispatcher = "Catalyst::Dispatcher::$ENV{CATALYST_DISPATCHER}" |
221 | if $ENV{CATALYST_DISPATCHER}; |
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222 | my $appdis = $ENV{ uc($caller) . '_DISPATCHER' }; |
223 | $dispatcher = "Catalyst::Dispatcher::$appdis" if $appdis; |
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224 | |
225 | $dispatcher->require; |
226 | die qq/Couldn't load dispatcher "$dispatcher", "$@"/ if $@; |
227 | { |
228 | no strict 'refs'; |
229 | push @{"$caller\::ISA"}, $dispatcher; |
230 | } |
231 | $caller->dispatcher($dispatcher); |
232 | $caller->log->debug(qq/Loaded dispatcher "$dispatcher"/) if $caller->debug; |
233 | |
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234 | # Engine |
235 | $engine = "Catalyst::Engine::$ENV{CATALYST_ENGINE}" |
236 | if $ENV{CATALYST_ENGINE}; |
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237 | my $appeng = $ENV{ uc($caller) . '_ENGINE' }; |
238 | $engine = "Catalyst::Engine::$appeng" if $appeng; |
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239 | |
240 | $engine->require; |
241 | die qq/Couldn't load engine "$engine", "$@"/ if $@; |
242 | { |
243 | no strict 'refs'; |
244 | push @{"$caller\::ISA"}, $engine; |
245 | } |
246 | $caller->engine($engine); |
247 | $caller->log->debug(qq/Loaded engine "$engine"/) if $caller->debug; |
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248 | |
249 | # Find home |
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250 | my $home = Catalyst::Utils::home($caller); |
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251 | if ( $caller->debug ) { |
252 | $home |
253 | ? ( -d $home ) |
254 | ? $caller->log->debug(qq/Found home "$home"/) |
255 | : $caller->log->debug(qq/Home "$home" doesn't exist/) |
256 | : $caller->log->debug(q/Couldn't find home/); |
257 | } |
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258 | $caller->config->{home} = $home || ''; |
259 | $caller->config->{root} = defined $home ? dir($home)->subdir('root') : ''; |
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260 | } |
261 | |
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262 | =item $c->engine |
263 | |
264 | Contains the engine class. |
265 | |
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266 | =item $c->log |
267 | |
268 | Contains the logging object. Unless it is already set Catalyst sets this up with a |
269 | C<Catalyst::Log> object. To use your own log class: |
270 | |
271 | $c->log( MyLogger->new ); |
272 | $c->log->info("now logging with my own logger!"); |
273 | |
274 | Your log class should implement the methods described in the C<Catalyst::Log> |
275 | man page. |
276 | |
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277 | =item $c->plugin( $name, $class, @args ) |
278 | |
279 | Instant plugins for Catalyst. |
280 | Classdata accessor/mutator will be created, class loaded and instantiated. |
281 | |
282 | MyApp->plugin( 'prototype', 'HTML::Prototype' ); |
283 | |
284 | $c->prototype->define_javascript_functions; |
285 | |
286 | =cut |
287 | |
288 | sub plugin { |
289 | my ( $class, $name, $plugin, @args ) = @_; |
290 | $plugin->require; |
291 | my $error = $UNIVERSAL::require::ERROR; |
292 | die qq/Couldn't load instant plugin "$plugin", "$error"/ if $error; |
293 | eval { $plugin->import }; |
294 | $class->mk_classdata($name); |
295 | my $obj; |
296 | eval { $obj = $plugin->new(@args) }; |
297 | die qq/Couldn't instantiate instant plugin "$plugin", "$@"/ if $@; |
298 | $class->$name($obj); |
299 | $class->log->debug(qq/Initialized instant plugin "$plugin" as "$name"/) |
300 | if $class->debug; |
301 | } |
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302 | |
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303 | =back |
304 | |
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305 | =head1 LIMITATIONS |
306 | |
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307 | mod_perl2 support is considered experimental and may contain bugs. |
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308 | |
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309 | =head1 SUPPORT |
310 | |
311 | IRC: |
312 | |
313 | Join #catalyst on irc.perl.org. |
314 | |
315 | Mailing-Lists: |
316 | |
317 | http://lists.rawmode.org/mailman/listinfo/catalyst |
318 | http://lists.rawmode.org/mailman/listinfo/catalyst-dev |
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319 | |
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320 | Web: |
321 | |
322 | http://catalyst.perl.org |
323 | |
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324 | =head1 SEE ALSO |
325 | |
61b1e958 |
326 | =over 4 |
327 | |
328 | =item L<Catalyst::Manual> - The Catalyst Manual |
329 | |
330 | =item L<Catalyst::Engine> - Core Engine |
331 | |
332 | =item L<Catalyst::Log> - The Log Class. |
333 | |
334 | =item L<Catalyst::Request> - The Request Object |
335 | |
336 | =item L<Catalyst::Response> - The Response Object |
337 | |
338 | =item L<Catalyst::Test> - The test suite. |
339 | |
340 | =back |
fc7ec1d9 |
341 | |
342 | =head1 AUTHOR |
343 | |
344 | Sebastian Riedel, C<sri@oook.de> |
345 | |
346 | =head1 THANK YOU |
347 | |
84cf74e7 |
348 | Andy Grundman, Andrew Ford, Andrew Ruthven, Autrijus Tang, Christian Hansen, |
ce2b098c |
349 | Christopher Hicks, Dan Sully, Danijel Milicevic, David Naughton, |
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350 | Gary Ashton Jones, Geoff Richards, Jesse Sheidlower, Jody Belka, |
351 | Johan Lindstrom, Leon Brocard, Marcus Ramberg, Tatsuhiko Miyagawa |
352 | and all the others who've helped. |
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353 | |
354 | =head1 LICENSE |
355 | |
356 | This library is free software . You can redistribute it and/or modify it under |
357 | the same terms as perl itself. |
358 | |
359 | =cut |
360 | |
361 | 1; |