Mercurial > pub > Impl
annotate Lib/IMPL/Web/Application.pm @ 131:3df87ee58bee
Added IMPL::IOException
| author | wizard |
|---|---|
| date | Wed, 16 Jun 2010 17:49:12 +0400 |
| parents | 06a34c197b05 |
| children | c5bc900eefd3 |
| rev | line source |
|---|---|
| 49 | 1 package IMPL::Web::Application; |
| 2 use strict; | |
| 3 use warnings; | |
| 4 | |
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5 use base qw(IMPL::Config IMPL::Object::Singleton); |
| 58 | 6 |
| 7 require IMPL::Web::Application::Action; | |
| 8 require IMPL::Web::Application::Response; | |
| 9 | |
| 49 | 10 use IMPL::Class::Property; |
| 57 | 11 use CGI; |
| 49 | 12 |
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13 __PACKAGE__->PassThroughArgs; |
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14 |
| 49 | 15 BEGIN { |
| 52 | 16 public property handlerError => prop_all; |
| 67 | 17 public property actionFactory => prop_all; |
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18 public property handlersQuery => prop_all | prop_list; |
| 65 | 19 public property responseCharset => prop_all; |
| 73 | 20 public property security => prop_all; |
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21 public property options => prop_all; |
| 97 | 22 public property fetchRequestMethod => prop_all; |
| 49 | 23 } |
| 24 | |
| 62 | 25 sub CTOR { |
| 26 my ($this) = @_; | |
| 27 | |
| 67 | 28 $this->actionFactory('IMPL::Web::Application::Action') unless $this->actionFactory; |
| 65 | 29 $this->responseCharset('utf-8') unless $this->responseCharset; |
| 97 | 30 $this->fetchRequestMethod(\&defaultFetchRequest) unless $this->fetchRequestMethod; |
| 31 $this->handlerError(\&defaultHandlerError) unless $this->handlerError; | |
| 62 | 32 } |
| 33 | |
| 49 | 34 sub Run { |
| 35 my ($this) = @_; | |
| 36 | |
| 58 | 37 while (my $query = $this->FetchRequest()) { |
| 38 | |
| 67 | 39 my $action = $this->actionFactory->new( |
| 62 | 40 query => $query, |
| 58 | 41 application => $this, |
| 65 | 42 ); |
| 43 | |
| 97 | 44 eval { |
| 45 $action->response->charset($this->responseCharset); | |
| 46 | |
| 47 $action->ChainHandler($_) foreach $this->handlersQuery; | |
| 48 | |
| 49 $action->Invoke(); | |
| 50 | |
| 51 $action->response->Complete; | |
| 52 }; | |
| 53 if ($@) { | |
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54 my $e = $@; |
| 129 | 55 # we are expecting this method to be safe otherwise we can trust nothing in this wolrd |
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56 $this->handlerError()->($this,$action,$e); |
| 97 | 57 } |
| 49 | 58 } |
| 59 } | |
| 60 | |
| 97 | 61 sub FetchRequest { |
| 62 my ($this) = @_; | |
| 63 | |
| 64 if( ref $this->fetchRequestMethod eq 'CODE' ) { | |
| 65 return $this->fetchRequestMethod->($this); | |
| 66 } else { | |
| 67 die new IMPL::Exception("Unknown fetchRequestMethod type",ref $this->fetchRequestMethod); | |
| 68 } | |
| 69 } | |
| 70 | |
| 57 | 71 { |
| 72 my $hasFetched = 0; | |
| 73 | |
| 97 | 74 sub defaultFetchRequest { |
| 129 | 75 my ($this) = @_; |
| 57 | 76 return undef if $hasFetched; |
| 77 $hasFetched = 1; | |
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78 my $query = CGIWrapper->new(); |
| 129 | 79 $query->charset($this->responseCharset); |
| 80 return $query; | |
| 57 | 81 } |
| 82 } | |
| 83 | |
| 97 | 84 sub defaultHandlerError { |
| 85 my ($this,$action,$e) = @_; | |
| 86 warn $e; | |
| 87 if ( eval { $action->ReinitResponse(); 1; } ) { | |
| 88 $action->response->contentType('text/plain'); | |
| 89 $action->response->charset($this->responseCharset); | |
| 90 $action->response->status(500); | |
| 91 my $hout = $action->response->streamBody; | |
| 92 print $hout $e; | |
| 93 $action->response->Complete(); | |
| 94 } | |
| 95 } | |
| 96 | |
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97 package CGIWrapper; |
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98 use base qw(CGI); |
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99 |
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100 use Encode; |
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101 |
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102 sub param { |
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103 my $this = shift; |
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104 |
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105 if (wantarray) { |
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106 my @result = $this->SUPER::param(@_); |
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107 |
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108 return map Encode::is_utf8($_) ? $_ : Encode::decode($this->charset,$_,Encode::LEAVE_SRC), @result; |
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109 } else { |
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110 my $result = $this->SUPER::param(@_); |
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111 |
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112 return Encode::is_utf8($result) ? $result : Encode::decode($this->charset,$result,Encode::LEAVE_SRC); |
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113 } |
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114 |
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115 } |
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116 |
| 49 | 117 1; |
| 118 | |
| 52 | 119 __END__ |
| 120 | |
| 49 | 121 =pod |
| 122 | |
| 123 =head1 SYNOPSIS | |
| 124 | |
| 67 | 125 =begin code |
| 126 | |
| 49 | 127 require MyApp; |
| 67 | 128 |
| 129 my $instance = spawn MyApp('app.config'); | |
| 130 | |
| 131 $instance->Run(); | |
| 132 | |
| 133 =end code | |
| 49 | 134 |
| 135 =head1 DESCRIPTION | |
| 136 | |
| 73 | 137 C< use base qw( IMPL::Config IMPL::Object::Singleton )> |
| 138 | |
| 49 | 139 Зкземпляр приложения содержит в себе глобальные настройки, реализует контроллер запросов, |
| 52 | 140 в качестве источника запросов используется CGI или иной совместимый модуль. |
| 49 | 141 |
| 52 | 142 Процесс обработки запроса состоит из следующих частей |
| 49 | 143 |
| 67 | 144 =over |
| 145 | |
| 146 =item 1 | |
| 147 | |
| 148 Получение cgi запроса | |
| 149 | |
| 150 =item 2 | |
| 52 | 151 |
| 67 | 152 Создание объекта C<IMPL::Web::Application::Action> |
| 52 | 153 |
| 67 | 154 =item 3 |
| 52 | 155 |
| 67 | 156 Формирование цепочки вызовов при помощи C<< IMPL::Web::Application::Action->ChainHandler >> |
| 157 | |
| 158 =item 4 | |
| 159 | |
| 160 Выполнение запроса C<< IMPL::Web::Application::Action->Invoke >> | |
| 49 | 161 |
| 162 =cut | |
| 67 | 163 |
| 164 Также приложение поддерживает отложенное создание объектов, которые по первому обращению | |
| 165 к свойствам. Это реализовано в базовом классе C< IMPL::Configuration >. Для настройки | |
| 166 активаторов можно использовать свойство C<options>, в которое должен быть помещен хеш | |
| 167 со ссылками на активаторы, см. пример ниже C<CONFIGURATION>. | |
| 168 | |
| 169 =head2 CONFIGURATION | |
| 170 | |
| 171 Ниже приведен пример конфигурации приложения | |
| 172 | |
| 173 =begin code xml | |
| 174 | |
| 175 <?xml version="1.0" encoding="UTF-8"?> | |
| 176 <Application id='app' type="Test::Web::Application::Instance"> | |
| 177 | |
| 178 <!-- Begin custom properties --> | |
| 179 <name>Sample application</name> | |
| 180 <dataSource type='IMPL::Config::Activator' id='ds'> | |
| 181 <factory>IMPL::Object</factory> | |
| 182 <parameters type='HASH'> | |
| 183 <db>data</db> | |
| 184 <user>nobody</user> | |
| 185 </parameters> | |
| 186 </dataSource> | |
| 187 <securityMod type='IMPL::Config::Activator'> | |
| 188 <factory>IMPL::Object</factory> | |
| 189 <parameters type='HASH'> | |
| 190 <ds refid='ds'/> | |
| 191 </parameters> | |
| 192 </securityMod> | |
| 193 <!-- End custom properties --> | |
| 194 | |
| 195 <!-- direct access to the activators --> | |
| 196 <options type="HASH"> | |
| 197 <dataSource refid='ds'/> | |
| 198 </options> | |
| 199 | |
| 200 <!-- Set default output encoding, can be changed due query handling --> | |
| 201 <responseCharset>utf-8</responseCharset> | |
| 202 | |
| 203 <!-- Actions creation configuration --> | |
| 204 <actionFactory type="IMPL::Object::Factory"> | |
| 205 | |
| 206 <!-- Construct actions --> | |
| 207 <factory>IMPL::Web::Application::Action</factory> | |
| 208 <parameters type='HASH'> | |
| 209 | |
| 210 <!-- with special responseFactory --> | |
| 211 <responseFactory type='IMPL::Object::Factory'> | |
| 212 | |
| 213 <!-- Where resopnses have a special streamOut --> | |
| 214 <factory>IMPL::Web::Application::Response</factory> | |
| 215 <parameters type='HASH'> | |
| 216 | |
| 217 <!-- in memory dummy output instead of STDOUT --> | |
| 218 <streamOut>memory</streamOut> | |
| 219 | |
| 220 </parameters> | |
| 221 </responseFactory> | |
| 222 </parameters> | |
| 223 </actionFactory> | |
| 224 | |
| 225 <!-- Query processing chain --> | |
| 226 <handlersQuery type="IMPL::Object::List"> | |
| 227 <item type="IMPL::Web::QueryHandler::PageFormat"> | |
| 228 <templatesCharset>cp1251</templatesCharset> | |
| 229 </item> | |
| 230 </handlersQuery> | |
| 231 </Application> | |
| 232 | |
| 233 =end code xml | |
| 234 | |
| 73 | 235 =head1 MEMBERS |
| 236 | |
| 237 =over | |
| 238 | |
| 239 =item C<[get,set] handlerError> | |
| 240 | |
| 241 Обработчик который будет вызван в случае возникновения необработанной ошибки | |
| 242 в процессе работы приложения. После чего приложение корректно завершается. | |
| 243 | |
| 244 =item C<[get,set] actionFactory> | |
| 245 | |
| 246 Фабрика объектов, которая используется приложением, для создания объектов | |
| 247 типа C<IMPL::Web::Application::Action> при обработки C<CGI> запросов. | |
| 248 | |
| 249 =begin code | |
| 250 | |
| 251 my $action = $this->actionFactory->new( | |
| 252 query => $query, | |
| 253 application => $this, | |
| 254 ); | |
| 255 | |
| 256 =end code | |
| 257 | |
| 97 | 258 =item C< [get,set] fetchRequestMethod > |
| 259 | |
| 260 Метод получения CGI запроса. Возвращает C<CGI> объект следующего запроса, если | |
| 261 запросов больше нет, то возвращает C<undef>. По-умолчанию использует C<defaultFetchRequest>. | |
| 262 | |
| 263 Может быть как ссылкой на функцию, так и объектом типа C<IMPL::Web::Application::RequestFetcher>. | |
| 264 | |
| 73 | 265 =item C< [get,set,list] handlersQuery > |
| 266 | |
| 267 Список обработчиков запросов, которые будут переданы созданному объекту-действию. | |
| 268 | |
| 269 =item C< [get,set] responseCharset> | |
| 270 | |
| 271 Кодировка ответа клиенту. | |
| 272 | |
| 273 =item C< [get,set] security > | |
| 274 | |
| 275 Объект C<IMPL::Web::Security>, для работы с инфраструктурой безопасности. | |
| 276 | |
| 277 =item C< [get,set] options > | |
| 278 | |
| 279 Обычно ссылка на хеш с настраиваемыми объектами, используется для возможности | |
| 280 програмной настройки активаторов, т.к. напрямую через свойства приложения получить | |
| 281 к ним доступ не получится. | |
| 282 | |
| 283 =back | |
| 284 | |
| 285 =cut |