Mercurial > pub > Impl
annotate Lib/IMPL/Web/Application/CustomResource.pm @ 373:3ca44e23fd1f
implemented new web resource
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date | Wed, 25 Dec 2013 17:29:38 +0400 |
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1 package IMPL::Web::Application::CustomResource; |
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2 use strict; |
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230 | 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 |
334 | 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' |
334 | 34 ); |
35 | |
330 | 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 } |
330 | 50 } |
51 | |
334 | 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; |
335 | 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; |
335 | 71 } |
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 $factory->new(%args); |
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125 } |
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126 |
334 | 127 sub PrepareResourcesCache { |
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128 my ($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) { |
248 | 136 |
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137 #skip resources without contract |
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138 next unless $res->{contract}; |
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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 ); |
295 | 150 } |
151 | |
330 | 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, $verb ); |
330 | 159 } |
160 } | |
161 | |
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162 sub GetChildResources { |
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163 |
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164 } |
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165 |
335 | 166 sub HttpOptions { |
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167 my ($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 { $delegate->can('Invoke') }; |
334 | 183 } |
184 | |
229
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185 1; |
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186 |
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187 __END__ |
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188 |
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189 =pod |
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190 |
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191 =head1 NAME |
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192 |
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193 C<IMPL::Web::Application::CustomResource> - базовый класс для ресурсов, |
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194 реальзуемых в коде. |
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195 |
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196 =head1 SYNOPSIS |
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197 |
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198 =begin code |
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199 |
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200 package MyApp::Web::Resources::ProfileResource; |
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201 use IMPL::declare { |
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202 base => [ |
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203 'IMPL::Web::Application::CustomResource' => '@_' |
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204 ] |
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205 } |
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206 |
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207 sub HttpGet { |
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208 my ($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 | 220 sub GetChildResources { |
221 return { | |
222 name => 'create', | |
223 contract => { | |
224 class => 'My::Web::FormResource', | |
225 formName => 'create', | |
226 schema => 'profile.schema' | |
227 } | |
228 }, | |
229 { | |
230 match => qr/^(.*)$/, | |
231 contract => { | |
232 class => 'My::Web::ItemResource' | |
233 } | |
234 } | |
235 } | |
332
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236 |
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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 | 255 =head2 C<[static]CreateContract(%args)> |
256 | |
257 Создает новый контракт, который при создании ресурсов будет передавать им в | |
258 конструкторе параметры C<%args>. Реализуется при помощи C<IMPL::Object::Factory> | |
259 которой задается параметр ссылка на C<%args>, т.о. при создании ресурса, ему в | |
260 конструкторе будет передан список из ключей и значений хеша C<%args>, а затем | |
261 остальные аргументы. | |
262 | |
295 | 263 =head2 C<[static]CreateResource(%args)> |
264 | |
265 Создает контракт по-умолчанию и вызывает у него метод C<CreateResource(%args)>. | |
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 | 281 name => 'info', |
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 | 288 Метод возвращает список из хешей, которые будут переданы в качестве параметра |
289 C<resources> контракту данного ресурса. | |
229
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290 |
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291 =cut |