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annotate Lib/IMPL/Web/Application.pm @ 400:ef37ec102dab

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redirection support while fetching child resources
author cin
date Wed, 14 May 2014 17:27:32 +0400
parents ec58c47edb52
children
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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 CGI;
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6 use Carp qw(carp);
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7 use IMPL::Const qw(:prop);
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8
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9 use IMPL::declare {
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10 require => {
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11 Locator => 'IMPL::Web::AutoLocator',
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12 TAction => 'IMPL::Web::Application::Action',
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13 HttpResponse => 'IMPL::Web::HttpResponse',
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14 TFactory => '-IMPL::Object::Factory',
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15 Exception => 'IMPL::Exception',
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16 ArgException => '-IMPL::InvalidArgumentException',
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17 InvalidOperationException => '-IMPL::InvalidOperationException',
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18 Loader => 'IMPL::Code::Loader'
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19 },
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20 base => [
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21 'IMPL::Config' => '@_',
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22 'IMPL::Object::Singleton' => undef
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23 ],
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24 props => [
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25 baseUrl => PROP_RW,
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26 actionFactory => PROP_RW,
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27 handlers => PROP_RW | PROP_LIST,
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28 securityFactory => PROP_RW,
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29 output => PROP_RW,
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30 location => PROP_RO,
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31 _handler => PROP_RW
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32 ]
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33 };
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34
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35 sub CTOR {
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36 my ($this) = @_;
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37
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38 die IMPL::InvalidArgumentException->new( "handlers",
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39 "At least one handler should be supplied" )
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40 unless $this->handlers->Count;
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41
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42 $this->baseUrl('/') unless $this->baseUrl;
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43
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44 $this->actionFactory(TAction) unless $this->actionFactory;
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45 $this->location(Locator->new(base => $this->baseUrl));
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46 }
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47
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48 sub CreateSecurity {
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49 my $factory = shift->securityFactory;
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50 return $factory ? $factory->new() : undef;
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51 }
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52
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53 sub ProcessRequest {
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54 my ($this,$q) = @_;
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55
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56 die ArgException->new(q => 'A query is required')
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57 unless $q;
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58
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59 my $handler = $this->_handler;
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60 unless ($handler) {
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61 $handler = _ChainHandler( $_, $handler ) foreach $this->handlers;
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62 $this->_handler($handler);
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63 }
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64
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65 my $action = $this->actionFactory->new(
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66 query => $q,
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67 application => $this,
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68 );
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70 eval {
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71 my $result = $handler->($action);
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73 die InvalidOperationException->new("Invalid handlers result. A reference to IMPL::Web::HttpResponse is expexted.")
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74 unless eval { $result->isa(HttpResponse) };
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76 $result->PrintResponse( $this->output );
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77 };
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78
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79 $action->Dispose();
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80
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81 if ($@) {
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82 my $e = $@;
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83
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84 HttpResponse->InternalError(
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85 type => 'text/plain',
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86 charset => 'utf-8',
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87 body => $e
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88 )->PrintResponse( $this->output );
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89
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90 }
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91 }
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92
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93 sub _ChainHandler {
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94 my ( $handler, $next ) = @_;
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95
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96 if ( ref $handler eq 'CODE' ) {
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97 return sub {
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98 my ($action) = @_;
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99 return $handler->( $action, $next );
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100 };
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101 }
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102 elsif ( eval { $handler->can('Invoke') } ) {
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103 return sub {
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104 my ($action) = @_;
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105 return $handler->Invoke( $action, $next );
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106 };
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107 }
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108 elsif ( eval { $handler->isa(TFactory) } ) {
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109 return sub {
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110 my ($action) = @_;
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111 my $inst = $handler->new();
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112 return $inst->Invoke( $action, $next );
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113 }
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114 }
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115 elsif ( $handler
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116 and not ref $handler
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117 and $handler =~ m/^(-)?(\w+(?:::\w+)*)$/ )
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118 {
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119 my $class = $2;
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120 if ( not $1 ) {
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121 Loader->safe->Require($class);
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122 die IMPL::InvalidArgumentException->(
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123 "An invalid handler supplied", $handler
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124 ) unless $class->can('Invoke');
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125 }
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126
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127 return sub {
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128 my ($action) = @_;
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129 my $inst = $class->new();
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130 return $inst->Invoke( $action, $next );
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131 };
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132 }
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133 else {
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134 die new IMPL::InvalidArgumentException( "An invalid handler supplied",
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135 $handler );
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136 }
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137 }
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138
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139 1;
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140
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141 __END__
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142
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143 =pod
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144
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145 =head1 NAME
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146
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147 C<IMPL::Web::Application> Базовай класс для веб-приложения
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148
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149 =cut