annotate Lib/IMPL/Web/Application.pm @ 103:c289ed9662ca

Schema beta 2 More strict validation, support for inflating a simple nodes and properties
author wizard
date Fri, 07 May 2010 18:17:40 +0400
parents 6dd659f6f66c
children e4f15cbc3f1a
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1 package IMPL::Web::Application;
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2 use strict;
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3 use warnings;
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4
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5 use base qw(IMPL::Config IMPL::Object::Singleton);
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6
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7 require IMPL::Web::Application::Action;
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8 require IMPL::Web::Application::Response;
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9
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10 use IMPL::Class::Property;
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11 use CGI;
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12
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13 __PACKAGE__->PassThroughArgs;
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14
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15 BEGIN {
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16 public property handlerError => prop_all;
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17 public property actionFactory => prop_all;
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18 public property handlersQuery => prop_all | prop_list;
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19 public property responseCharset => prop_all;
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20 public property security => prop_all;
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21 public property options => prop_all;
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22 public property fetchRequestMethod => prop_all;
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23 }
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24
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25 sub CTOR {
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26 my ($this) = @_;
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27
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28 $this->actionFactory('IMPL::Web::Application::Action') unless $this->actionFactory;
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29 $this->responseCharset('utf-8') unless $this->responseCharset;
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30 $this->fetchRequestMethod(\&defaultFetchRequest) unless $this->fetchRequestMethod;
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31 $this->handlerError(\&defaultHandlerError) unless $this->handlerError;
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32 }
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33
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34 sub Run {
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35 my ($this) = @_;
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36
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37 while (my $query = $this->FetchRequest()) {
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38
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39 my $action = $this->actionFactory->new(
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40 query => $query,
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41 application => $this,
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42 );
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43
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44 eval {
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45 $action->response->charset($this->responseCharset);
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46
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47 $action->ChainHandler($_) foreach $this->handlersQuery;
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48
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49 $action->Invoke();
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50
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51 $action->response->Complete;
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52 };
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53 if ($@) {
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54 my $e = $@;
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55 # we are expect that this method is safe otherwise we can trust nothing in this wolrd
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56 $this->handlerError()->($this,$action,$e);
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57 }
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58 }
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59 }
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60
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61 sub FetchRequest {
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62 my ($this) = @_;
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63
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64 if( ref $this->fetchRequestMethod eq 'CODE' ) {
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65 return $this->fetchRequestMethod->($this);
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66 } else {
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67 die new IMPL::Exception("Unknown fetchRequestMethod type",ref $this->fetchRequestMethod);
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68 }
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69 }
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71 {
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72 my $hasFetched = 0;
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73
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74 sub defaultFetchRequest {
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75 return undef if $hasFetched;
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76 $hasFetched = 1;
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77 return CGI->new();
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78 }
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79 }
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80
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81 sub defaultHandlerError {
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82 my ($this,$action,$e) = @_;
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83 warn $e;
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84 if ( eval { $action->ReinitResponse(); 1; } ) {
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85 $action->response->contentType('text/plain');
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86 $action->response->charset($this->responseCharset);
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87 $action->response->status(500);
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88 my $hout = $action->response->streamBody;
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89 print $hout $e;
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90 $action->response->Complete();
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91 }
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92 }
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93
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94 1;
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95
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96 __END__
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97
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98 =pod
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99
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100 =head1 SYNOPSIS
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101
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102 =begin code
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103
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104 require MyApp;
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105
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106 my $instance = spawn MyApp('app.config');
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107
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108 $instance->Run();
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109
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110 =end code
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111
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112 =head1 DESCRIPTION
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113
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114 C< use base qw( IMPL::Config IMPL::Object::Singleton )>
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115
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116 Зкземпляр приложения содержит в себе глобальные настройки, реализует контроллер запросов,
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117 в качестве источника запросов используется CGI или иной совместимый модуль.
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118
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119 Процесс обработки запроса состоит из следующих частей
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120
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121 =over
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122
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123 =item 1
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124
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125 Получение cgi запроса
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126
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127 =item 2
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128
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129 Создание объекта C<IMPL::Web::Application::Action>
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130
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131 =item 3
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132
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133 Формирование цепочки вызовов при помощи C<< IMPL::Web::Application::Action->ChainHandler >>
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134
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135 =item 4
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136
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137 Выполнение запроса C<< IMPL::Web::Application::Action->Invoke >>
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138
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139 =cut
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140
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141 Также приложение поддерживает отложенное создание объектов, которые по первому обращению
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142 к свойствам. Это реализовано в базовом классе C< IMPL::Configuration >. Для настройки
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143 активаторов можно использовать свойство C<options>, в которое должен быть помещен хеш
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144 со ссылками на активаторы, см. пример ниже C<CONFIGURATION>.
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145
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146 =head2 CONFIGURATION
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147
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148 Ниже приведен пример конфигурации приложения
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149
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150 =begin code xml
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151
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152 <?xml version="1.0" encoding="UTF-8"?>
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153 <Application id='app' type="Test::Web::Application::Instance">
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154
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155 <!-- Begin custom properties -->
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156 <name>Sample application</name>
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157 <dataSource type='IMPL::Config::Activator' id='ds'>
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158 <factory>IMPL::Object</factory>
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159 <parameters type='HASH'>
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160 <db>data</db>
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161 <user>nobody</user>
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162 </parameters>
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163 </dataSource>
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164 <securityMod type='IMPL::Config::Activator'>
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165 <factory>IMPL::Object</factory>
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166 <parameters type='HASH'>
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167 <ds refid='ds'/>
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168 </parameters>
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169 </securityMod>
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170 <!-- End custom properties -->
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171
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172 <!-- direct access to the activators -->
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173 <options type="HASH">
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174 <dataSource refid='ds'/>
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175 </options>
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176
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177 <!-- Set default output encoding, can be changed due query handling -->
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178 <responseCharset>utf-8</responseCharset>
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179
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180 <!-- Actions creation configuration -->
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181 <actionFactory type="IMPL::Object::Factory">
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182
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183 <!-- Construct actions -->
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184 <factory>IMPL::Web::Application::Action</factory>
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185 <parameters type='HASH'>
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186
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187 <!-- with special responseFactory -->
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188 <responseFactory type='IMPL::Object::Factory'>
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189
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190 <!-- Where resopnses have a special streamOut -->
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191 <factory>IMPL::Web::Application::Response</factory>
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192 <parameters type='HASH'>
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193
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194 <!-- in memory dummy output instead of STDOUT -->
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195 <streamOut>memory</streamOut>
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196
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197 </parameters>
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198 </responseFactory>
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199 </parameters>
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200 </actionFactory>
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201
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202 <!-- Query processing chain -->
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203 <handlersQuery type="IMPL::Object::List">
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204 <item type="IMPL::Web::QueryHandler::PageFormat">
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205 <templatesCharset>cp1251</templatesCharset>
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206 </item>
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207 </handlersQuery>
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208 </Application>
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209
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210 =end code xml
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211
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212 =head1 MEMBERS
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213
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214 =over
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215
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216 =item C<[get,set] handlerError>
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217
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218 Обработчик который будет вызван в случае возникновения необработанной ошибки
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219 в процессе работы приложения. После чего приложение корректно завершается.
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220
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221 =item C<[get,set] actionFactory>
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222
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223 Фабрика объектов, которая используется приложением, для создания объектов
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224 типа C<IMPL::Web::Application::Action> при обработки C<CGI> запросов.
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225
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226 =begin code
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227
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228 my $action = $this->actionFactory->new(
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229 query => $query,
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230 application => $this,
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231 );
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232
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233 =end code
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234
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235 =item C< [get,set] fetchRequestMethod >
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236
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237 Метод получения CGI запроса. Возвращает C<CGI> объект следующего запроса, если
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238 запросов больше нет, то возвращает C<undef>. По-умолчанию использует C<defaultFetchRequest>.
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239
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240 Может быть как ссылкой на функцию, так и объектом типа C<IMPL::Web::Application::RequestFetcher>.
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241
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242 =item C< [get,set,list] handlersQuery >
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243
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244 Список обработчиков запросов, которые будут переданы созданному объекту-действию.
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245
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246 =item C< [get,set] responseCharset>
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247
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248 Кодировка ответа клиенту.
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249
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250 =item C< [get,set] security >
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251
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252 Объект C<IMPL::Web::Security>, для работы с инфраструктурой безопасности.
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253
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254 =item C< [get,set] options >
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255
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256 Обычно ссылка на хеш с настраиваемыми объектами, используется для возможности
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257 програмной настройки активаторов, т.к. напрямую через свойства приложения получить
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258 к ним доступ не получится.
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259
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260 =back
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261
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262 =cut