annotate Lib/IMPL/Security/AbstractContext.pm @ 303:a5eb64c6e6f7

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date Mon, 08 Apr 2013 02:18:47 +0400
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1 package IMPL::Security::AbstractContext;
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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 IMPL::Const qw(:prop);
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6
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7 use IMPL::require {
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8 Role => 'IMPL::Security::Role',
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9 Exception => 'IMPL::Exception',
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10 NotImplementedException => '-IMPL::NotImplementedException'
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11 };
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12
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13 use parent qw(IMPL::Class::Meta);
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14
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15 __PACKAGE__->static_accessor_clone(abstractProps => [
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16 principal => PROP_RW,
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17 rolesAssigned => PROP_RW | PROP_LIST,
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18 auth => PROP_RW,
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19 authority => PROP_RW
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20 ]);
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21
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22 my $current; # current session if any
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23
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24 sub Impersonate {
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25 my ($this,$code,@args) = @_;
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26
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27 my $old = $current;
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28 $current = $this;
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29 my $result;
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30 my $e;
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31
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32 {
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33 local $@;
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34 eval {
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35 $result = $code->(@args);
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36 };
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37 $e = $@;
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38 }
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39 $current = $old;
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40 if($e) {
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41 die $e;
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42 } else {
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43 return $result;
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44 }
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45 }
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46
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47 sub Apply {
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48 my ($this) = @_;
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49
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50 $current = $this;
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51 }
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52
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53 sub isTrusted {
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54 my ($this) = @_;
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55
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56 if (my $auth = $this->auth) {
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57 return $auth->isTrusted;
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58 } else {
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59 return 0;
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60 }
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61 }
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63 sub Satisfy {
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64 my ($this,@roles) = @_;
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65
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66 my $roleEffective = Role->new ( _effective => scalar $this->rolesAssigned );
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67
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68 return $roleEffective->Satisfy(@roles);
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69 }
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70
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71 sub current {
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72 $current;
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73 }
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74
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75 1;
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76
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77 __END__
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78
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79 =pod
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81 =head1 NAME
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82
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83 C<abstract IMPL::Security::Context> - контекст безопасности.
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84
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85 =head1 SINOPSYS
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86
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87 =begin code
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88
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89 package MyApp::Model::Session;
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90 use strict;
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92 use IMPL::delare {
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93 base => [
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94 'MyApp::Model::BaseDBO' => '@_',
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95 'IMPL::Security::AbstractContext' => undef
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96 ],
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97 props {
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98 IMPL::Security::AbstractContext->abstractProps,
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99 qouta => PROP_GET
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100 }
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101 }
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102
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103 package main;
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104
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105 $app->model->GetSession('546a54df4')->Impersonate(sub{
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106 # do something
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107 });
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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 Код приложения, которое выполняется
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114
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115 Являет собой контекст безопасности, описывает пользователя и привелегии, так же
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116 у программы есть текущий контекст безопасности, по умолчанию он C<nobody>.
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117
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118 =head1 MEMBERS
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119
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120 =head2 C<[get] principal>
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121
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122 Идентификатор пользователя, владельца контекста.
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123
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124 =head2 C<[get,set] rolesAssigned>
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125
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126 Явно назначенные роли. Если список пуст, то считается, что используются роли
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127 пользователя по-умолчанию.
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128
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129 =head2 C<[get] auth>
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130
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131 Объект асторизации C<IMPL::Security::Auth>, использованный при создании текущего контекста.
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132
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133 =head2 C<[get] authority>
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135 Модуль безопасности, породивший данный контекст. Модуль безопасности, отвечающий
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136 за создание контекста безопасности должен реализовывать метод
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137 C<CreateContext($user,$auth,$roles)>
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138
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139 =head2 C<[get] isTrusted>
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141 Возвращает значение является ли контекст доверенным, тоесть клиент
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142 аутентифицирован и сессия установлена. Если C<false> значит, что сессия была
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143 начата, однако не установлена до конца.
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145 =head2 C<Impersonate($code)>
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146
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147 Делает контекст текущим и выполняет в нем функцию по ссылке C<$code>. По окончании
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148 выполнения, контекст восстанавливается в предыдущий (не зависимо от того, что
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149 с ним происходило во время выполнения C<$code>).
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151 =head2 C<Apply()>
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153 Заменяет текущий контекст на себя, но до конца действия метода C<Impersonate>, если
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154 таковой был вызван.
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155
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156 =head2 C<Satisfy(@roles)>
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157
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158 Проверяет наличие необходимых ролей у контекста. Данный метод позволяет
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159 абстрагироваться от механизмов связи контекста и ролей. Возвращает истинное
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160 значение если список необходимых ролей у пользователя имеется.
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161
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162 =cut