annotate Lib/IMPL/Web/Application.pm @ 97:964587c5183c

Added SecureCall to Web QueryHandlers stack many bug fixes to Security and Web Application modules
author wizard
date Tue, 04 May 2010 04:04:37 +0400
parents 2f31ecabe9ea
children 6dd659f6f66c
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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 eval { $this->handlerError()->($this,$action,$e); 1;} or warn "Error in handlerError: ",$@;
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56 }
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57 }
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58 }
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59
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60 sub FetchRequest {
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61 my ($this) = @_;
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62
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63 if( ref $this->fetchRequestMethod eq 'CODE' ) {
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64 return $this->fetchRequestMethod->($this);
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65 } else {
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66 die new IMPL::Exception("Unknown fetchRequestMethod type",ref $this->fetchRequestMethod);
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67 }
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68 }
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69
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70 {
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71 my $hasFetched = 0;
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72
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73 sub defaultFetchRequest {
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74 return undef if $hasFetched;
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75 $hasFetched = 1;
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76 return CGI->new();
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77 }
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78 }
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79
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80 sub defaultHandlerError {
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81 my ($this,$action,$e) = @_;
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82 warn $e;
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83 if ( eval { $action->ReinitResponse(); 1; } ) {
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84 $action->response->contentType('text/plain');
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85 $action->response->charset($this->responseCharset);
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86 $action->response->status(500);
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87 my $hout = $action->response->streamBody;
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88 print $hout $e;
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89 $action->response->Complete();
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90 }
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91 }
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92
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93 1;
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94
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95 __END__
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96
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97 =pod
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98
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99 =head1 SYNOPSIS
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100
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101 =begin code
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102
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103 require MyApp;
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104
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105 my $instance = spawn MyApp('app.config');
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106
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107 $instance->Run();
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108
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109 =end code
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110
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111 =head1 DESCRIPTION
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112
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113 C< use base qw( IMPL::Config IMPL::Object::Singleton )>
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114
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115 Зкземпляр приложения содержит в себе глобальные настройки, реализует контроллер запросов,
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116 в качестве источника запросов используется CGI или иной совместимый модуль.
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117
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118 Процесс обработки запроса состоит из следующих частей
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119
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120 =over
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121
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122 =item 1
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123
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124 Получение cgi запроса
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125
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126 =item 2
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127
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128 Создание объекта C<IMPL::Web::Application::Action>
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129
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130 =item 3
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131
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132 Формирование цепочки вызовов при помощи C<< IMPL::Web::Application::Action->ChainHandler >>
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133
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134 =item 4
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135
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136 Выполнение запроса C<< IMPL::Web::Application::Action->Invoke >>
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137
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138 =cut
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139
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140 Также приложение поддерживает отложенное создание объектов, которые по первому обращению
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141 к свойствам. Это реализовано в базовом классе C< IMPL::Configuration >. Для настройки
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142 активаторов можно использовать свойство C<options>, в которое должен быть помещен хеш
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143 со ссылками на активаторы, см. пример ниже C<CONFIGURATION>.
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144
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145 =head2 CONFIGURATION
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146
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147 Ниже приведен пример конфигурации приложения
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148
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149 =begin code xml
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150
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151 <?xml version="1.0" encoding="UTF-8"?>
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152 <Application id='app' type="Test::Web::Application::Instance">
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153
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154 <!-- Begin custom properties -->
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155 <name>Sample application</name>
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156 <dataSource type='IMPL::Config::Activator' id='ds'>
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157 <factory>IMPL::Object</factory>
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158 <parameters type='HASH'>
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159 <db>data</db>
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160 <user>nobody</user>
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161 </parameters>
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162 </dataSource>
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163 <securityMod type='IMPL::Config::Activator'>
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164 <factory>IMPL::Object</factory>
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165 <parameters type='HASH'>
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166 <ds refid='ds'/>
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167 </parameters>
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168 </securityMod>
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169 <!-- End custom properties -->
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170
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171 <!-- direct access to the activators -->
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172 <options type="HASH">
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173 <dataSource refid='ds'/>
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174 </options>
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175
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176 <!-- Set default output encoding, can be changed due query handling -->
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177 <responseCharset>utf-8</responseCharset>
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178
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179 <!-- Actions creation configuration -->
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180 <actionFactory type="IMPL::Object::Factory">
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181
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182 <!-- Construct actions -->
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183 <factory>IMPL::Web::Application::Action</factory>
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184 <parameters type='HASH'>
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185
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186 <!-- with special responseFactory -->
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187 <responseFactory type='IMPL::Object::Factory'>
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188
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189 <!-- Where resopnses have a special streamOut -->
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190 <factory>IMPL::Web::Application::Response</factory>
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191 <parameters type='HASH'>
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192
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193 <!-- in memory dummy output instead of STDOUT -->
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194 <streamOut>memory</streamOut>
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195
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196 </parameters>
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197 </responseFactory>
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198 </parameters>
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199 </actionFactory>
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200
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201 <!-- Query processing chain -->
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202 <handlersQuery type="IMPL::Object::List">
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203 <item type="IMPL::Web::QueryHandler::PageFormat">
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204 <templatesCharset>cp1251</templatesCharset>
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205 </item>
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206 </handlersQuery>
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207 </Application>
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208
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209 =end code xml
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210
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211 =head1 MEMBERS
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212
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213 =over
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214
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215 =item C<[get,set] handlerError>
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216
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217 Обработчик который будет вызван в случае возникновения необработанной ошибки
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218 в процессе работы приложения. После чего приложение корректно завершается.
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219
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220 =item C<[get,set] actionFactory>
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221
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222 Фабрика объектов, которая используется приложением, для создания объектов
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223 типа C<IMPL::Web::Application::Action> при обработки C<CGI> запросов.
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224
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225 =begin code
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226
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227 my $action = $this->actionFactory->new(
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228 query => $query,
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229 application => $this,
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230 );
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231
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232 =end code
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233
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234 =item C< [get,set] fetchRequestMethod >
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235
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236 Метод получения CGI запроса. Возвращает C<CGI> объект следующего запроса, если
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237 запросов больше нет, то возвращает C<undef>. По-умолчанию использует C<defaultFetchRequest>.
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238
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239 Может быть как ссылкой на функцию, так и объектом типа C<IMPL::Web::Application::RequestFetcher>.
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240
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241 =item C< [get,set,list] handlersQuery >
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242
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243 Список обработчиков запросов, которые будут переданы созданному объекту-действию.
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244
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245 =item C< [get,set] responseCharset>
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246
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247 Кодировка ответа клиенту.
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248
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249 =item C< [get,set] security >
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250
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251 Объект C<IMPL::Web::Security>, для работы с инфраструктурой безопасности.
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252
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253 =item C< [get,set] options >
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254
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255 Обычно ссылка на хеш с настраиваемыми объектами, используется для возможности
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256 програмной настройки активаторов, т.к. напрямую через свойства приложения получить
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257 к ним доступ не получится.
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258
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259 =back
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260
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261 =cut