annotate Lib/IMPL/Web/Application/CustomResource.pm @ 389:5aff94ba842f

DOM Schema refactoring complete
author cin
date Wed, 12 Feb 2014 13:36:24 +0400
parents e12c14177848
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1 package IMPL::Web::Application::CustomResource;
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2 use strict;
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3
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6d8092d8ce1b *reworked IMPL::Security
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4 use IMPL::Const qw(:prop);
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5 use IMPL::lang qw(:hash :base);
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6 use IMPL::declare {
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7 require => {
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8 Exception => 'IMPL::Exception',
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9 OperationException => '-IMPL::InvalidOperationException',
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10 NotFoundException => 'IMPL::Web::NotFoundException',
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11 HttpResponse => 'IMPL::Web::HttpResponse',
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12 Loader => 'IMPL::Code::Loader'
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13 },
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14 base => [ 'IMPL::Web::Application::ResourceBase' => '@_' ],
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15 props => [
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16 accessCheck => PROP_RW,
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17 resources => PROP_RO,
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18 verbs => PROP_RO,
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19 namedResources => PROP_RO,
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20 regexResources => PROP_RO
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21 ]
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22 };
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23
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24 use constant { CustomResource => __PACKAGE__ };
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25
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26 our %RESOURCE_BINDINGS = (
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27 GET => 'HttpGet',
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28 POST => 'HttpPost',
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29 PUT => 'HttpPut',
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30 DELETE => 'HttpDelete',
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31 HEAD => 'HttpHead',
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32 OPTIONS => 'HttpOptions',
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33 TRACE => 'HttpTrace'
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34 );
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35
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36 sub CTOR {
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37 my ( $this, %args ) = @_;
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38
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39 $this->verbs( $args{verbs} || {} );
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40 $this->resources( $args{resources} || [] );
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41
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42 $this->accessCheck( $args{accessCheck} )
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43 if $args{accessCheck};
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44
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45 while ( my ( $verb, $methodName ) = each %RESOURCE_BINDINGS ) {
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46 if ( my $method = $this->can($methodName) ) {
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47 $this->verbs->{ lc($verb) } ||= $method;
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48 }
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49 }
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50 }
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51
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52 sub FindChildResourceInfo {
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53 my ( $this, $name ) = @_;
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54
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55 $this->PrepareResourcesCache()
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56 unless $this->namedResources;
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57
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58 if ( my $info = $this->namedResources->{$name} ) {
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59 return $info, [$name];
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60 }
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61 else {
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62 foreach my $info ( @{ $this->regexResources } ) {
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63 my $rx = $info->{match};
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64 if ( my @childId = $name =~ m/$rx/ ) {
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65 return $info, \@childId;
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66 }
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67 }
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68 }
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69
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70 return;
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71 }
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72
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73 # это реализация по умолчанию, базируется информации о ресурсах, содержащийся
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74 # в контракте.
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75 sub FetchChildResource {
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76 my ( $this, $childId ) = @_;
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77
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78 $this->AccessCheck('FETCH');
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79
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80 my ( $info, $childIdParts ) = $this->FindChildResourceInfo($childId);
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81
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82 die NotFoundException->new( $this->location->url, $childId ) unless $info;
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83
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84 my %args;
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85
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86 my $binding = $info->{binding};
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87 my $contract = $info->{contract};
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88 if ( ref($binding) eq 'HASH' ) {
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89 $args{$_} = _InvokeDelegate( $binding->{$_}, $this, @$childIdParts )
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90 foreach keys %$binding;
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91 }
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92 else {
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93 $args{model} = _InvokeDelegate( $binding, $this, @$childIdParts );
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94 }
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95
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96 # support for dynamic contracts
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97 if ( ref $contract eq 'CODE' || eval { $contract->can('Invoke') } ) {
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98 $contract = _InvokeDelegate( $contract, $this, $args{model} );
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99 }
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100
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101 die OperationException->new( "Can't fetch a contract for the resource",
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102 $childId )
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103 unless $contract;
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104
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105 $args{parent} = $this;
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106 $args{id} = $childId;
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107 $args{request} = $this->request;
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108
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109 my $factory;
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110
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111 if ( ref($contract) eq 'HASH' ) {
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112 $factory = delete $contract->{class} || CustomResource;
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113 hashApply( \%args, $contract );
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114
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115 Loader->default->Require($factory)
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116 unless ref($factory);
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117 }
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118 else {
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119 die OperationException->new(
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120 "Unsupported contract for the child resource '$childId'",
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121 $contract, $this->location );
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122 }
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123
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124 return $factory->new(%args);
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125 }
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126
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127 sub PrepareResourcesCache {
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128 my ($this) = @_;
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129
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130 my @resources = ( $this->GetChildResources(), @{ $this->resources } );
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131
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132 my %nameMap;
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133 my @rxMap;
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134
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135 foreach my $res (@resources) {
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136
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137 #skip resources without contract
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138 next unless $res->{contract};
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139
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140 if ( my $name = $res->{name} ) {
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141 $nameMap{$name} = $res;
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142 }
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143 if ( $res->{match} ) {
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144 push @rxMap, $res;
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145 }
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146 }
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147
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148 $this->regexResources( \@rxMap );
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149 $this->namedResources( \%nameMap );
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150 }
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151
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152 sub AccessCheck {
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153 my ( $this, $verb ) = @_;
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154
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155 my $handler = $this->accessCheck;
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156
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157 if ( ref($handler) eq 'CODE' ) {
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158 return &$handler( $this, $verb );
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159 }
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160 }
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161
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162 sub GetChildResources {
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163
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164 }
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165
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166 sub HttpOptions {
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167 my ($this) = @_;
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168
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169 my @allow = $this->GetAllowedMethods();
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170 return HttpResponse->new(
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171 status => '200 OK',
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172 headers => {
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173 allow => join( ',', @allow )
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174 }
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175 );
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176 }
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177
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178 sub _InvokeDelegate {
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179 my $delegate = shift;
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180
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181 return $delegate->(@_) if ref $delegate eq 'CODE';
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182 return $delegate->Invoke(@_) if eval { $delegate->can('Invoke') };
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183 }
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184
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185 1;
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186
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187 __END__
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188
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189 =pod
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190
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191 =head1 NAME
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192
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193 C<IMPL::Web::Application::CustomResource> - базовый класс для ресурсов,
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194 реальзуемых в коде.
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195
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196 =head1 SYNOPSIS
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197
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198 =begin code
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199
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200 package MyApp::Web::Resources::ProfileResource;
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201 use IMPL::declare {
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202 base => [
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203 'IMPL::Web::Application::CustomResource' => '@_'
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204 ]
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205 }
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206
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207 sub HttpGet {
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208 my ($this) = @_;
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209 return $this->model;
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210 }
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211
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212 sub HttpPut {
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213 my ($this,$action) = @_;
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214
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215 my $form = MyApp::Web::Schema::UpdateUser->new();
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216
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217 $this->model->update( $form->Bind($action) );
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218 }
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219
334
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220 sub GetChildResources {
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221 return {
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222 name => 'create',
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223 contract => {
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224 class => 'My::Web::FormResource',
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225 formName => 'create',
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226 schema => 'profile.schema'
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227 }
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228 },
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229 {
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230 match => qr/^(.*)$/,
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231 contract => {
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232 class => 'My::Web::ItemResource'
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233 }
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234 }
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235 }
332
04a093f0a5a6 IMPL::Web::Application refactoring: resources are created per client request
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236
229
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237 =end code
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238
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239 =head1 MEMBERS
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240
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241 =head2 C<[static]contractFactory>
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242
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243 Фабрика, используемая для получения контракта ресурса. По умолчанию
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244 C<IMPL::Web::Application::CustomResourceContract>.
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245
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246 =head2 C<[static]contractInstance>
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247
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248 Экземпляр контракта для ресурса. Создается при первом обращении при помощи
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249 метода C<InitContract()>.
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250
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251 =head2 C<[static]InitContract()>
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252
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253 Создает новый экземпляр контракта, используя фабрику из свойства C<contractFactory>.
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254
248
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255 =head2 C<[static]CreateContract(%args)>
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256
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257 Создает новый контракт, который при создании ресурсов будет передавать им в
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258 конструкторе параметры C<%args>. Реализуется при помощи C<IMPL::Object::Factory>
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259 которой задается параметр ссылка на C<%args>, т.о. при создании ресурса, ему в
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260 конструкторе будет передан список из ключей и значений хеша C<%args>, а затем
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261 остальные аргументы.
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262
295
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263 =head2 C<[static]CreateResource(%args)>
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264
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265 Создает контракт по-умолчанию и вызывает у него метод C<CreateResource(%args)>.
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266
229
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267 =head2 C<[static]GetChildResources()>
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268
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269 Статический метод, который должны переопределять новые классы ресурсов, у
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270 которых есть дочерние ресурсы.
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271
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272 =begin code
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273
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274 package MyApp::Web::MyResource
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275
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276 sub GetChildResources {
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277 my $self = shift;
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278 return
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279 $self->SUPER::GetChildResources(),
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280 {
230
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281 name => 'info',
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282 contract => $contractInfo
229
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283 };
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284 }
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285
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286 =end code
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287
230
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288 Метод возвращает список из хешей, которые будут переданы в качестве параметра
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289 C<resources> контракту данного ресурса.
229
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290
372
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291 =cut