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package WebService::ILS; |
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use Modern::Perl; |
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our $VERSION = "0.16"; |
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=encoding utf-8 |
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=head1 NAME |
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WebService::ILS - Standardised library discovery/circulation services |
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=head1 SYNOPSIS |
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use WebService::ILS::; |
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my $ils = WebService::ILS::->new({ |
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client_id => $client_id, |
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client_secret => $client_secret |
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}); |
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my %search_params = ( |
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query => "Some keyword", |
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sort => "rating", |
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); |
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my $result = $ils->search(\%search_params); |
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foreach (@{ $result->{items} }) { |
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... |
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} |
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foreach (2..$result->{pages}) { |
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$search_params{page} = $_; |
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my $next_results = $ils->search(\%search_params); |
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... |
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} |
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or |
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my $native_result = $ils->native_search(\%native_search_params); |
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=head1 DESCRIPTION |
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WebService::ILS is an attempt to create a standardised interface for |
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online library services providers. |
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In addition, native API interface is provided. |
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Here we will describe constructor parameters and methods common to all |
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service providers. Diversions and native interfaces are documented |
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in corresponding modules. |
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=head2 Supported service providers |
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=over 4 |
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53
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=item B |
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55
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OverDrive Library API L |
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=item B |
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59
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OverDrive Circulation API L |
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=back |
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63
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=head1 INTERFACE |
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65
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=head2 Error handling |
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67
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Method calls will die on error. $@ will contain a multi-line string. |
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See C below. |
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70
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=head2 Item record |
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72
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Item record is returned by many methods, so we specify it here. |
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74
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=over 12 |
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76
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=item C |
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=item C |
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80
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=item C |
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82
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=item C |
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84
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=item C |
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86
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=item C |
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88
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=item C |
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90
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=item C |
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92
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=item C |
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94
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=item C => user ratings metrics |
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96
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=item C => checkout metrics |
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98
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=item C => subject categories (tags) |
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100
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=item C => a hashref of facet => [values] |
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102
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=item C => book, e-book, video, audio etc |
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104
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=item C => an arrayref of available formats |
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106
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=item C => a hashref of size => url |
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108
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=item C => for decryption purposes |
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110
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=item C => subject to drm |
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112
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=back |
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114
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Not all fields are available for all service providers. |
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Field values are not standardised. |
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117
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=cut |
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119
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5
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5
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666
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use Carp; |
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10
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229
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120
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5
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1441
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use Hash::Merge; |
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10041
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5
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211
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121
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1480
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use Params::Check; |
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15505
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5
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226
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122
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2195
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use LWP::UserAgent; |
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104462
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5
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204
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123
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5
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54
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use HTTP::Status qw(:constants); |
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22
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5
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1857
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124
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5
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5
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1607
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use MIME::Base64 qw(); |
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2583
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5
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120
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125
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5
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5
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467
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use JSON qw(from_json); |
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5
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5473
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5
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30
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126
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127
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our $DEBUG; |
128
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129
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my %CONSTRUCTOR_PARAMS_SPEC; |
130
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sub _set_param_spec { |
131
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14
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14
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33
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my $class = shift; |
132
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14
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23
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my $param_spec = shift; |
133
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134
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14
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36
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$CONSTRUCTOR_PARAMS_SPEC{$class} = $param_spec; |
135
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} |
136
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sub _get_param_spec { |
137
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2
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2
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5
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my $class = shift; |
138
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2
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50
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7
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if (my $ref = ref($class)) { |
139
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0
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0
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$class = $ref; |
140
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} |
141
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142
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2
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6
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my $p_s = $CONSTRUCTOR_PARAMS_SPEC{$class}; |
143
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2
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50
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14
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return $p_s if $class eq __PACKAGE__; |
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145
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0
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0
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(my $superclass = $class) =~ s/::\w+$//o; |
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0
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0
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0
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return Hash::Merge::merge($p_s || {}, $superclass->_get_param_spec); |
147
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} |
148
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149
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=head1 CONSTRUCTOR |
150
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151
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=head2 new (%params_hash or $params_hashref) |
152
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153
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=head3 Client (vendor) related constructor params, given by service provider: |
154
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155
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=over 12 |
156
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157
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=item C => client (vendor) identifier |
158
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159
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=item C => secret key (password) |
160
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161
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=item C => sometimes service providers provide access |
162
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to differnt "libraries" |
163
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164
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=back |
165
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166
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=head3 General constructor params: |
167
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168
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=over 12 |
169
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170
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=item C => LWP::UserAgent or a derivative; |
171
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usually not needed, one is created for you. |
172
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173
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=item C => LWP::UserAgent constructor params |
174
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so you don't need to create user agent yourself |
175
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176
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=item C => as returned from the provider authentication system |
177
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178
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=item C => as returned from the provider authentication system |
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180
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=back |
181
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182
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These are also read-only attributes |
183
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184
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Not all of client/library params are required for all service providers. |
185
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186
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=cut |
187
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188
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5
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21
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use Class::Tiny qw( |
189
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user_agent |
190
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client_id client_secret library_id |
191
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access_token access_token_type |
192
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5
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2442
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); |
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6734
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193
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194
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__PACKAGE__->_set_param_spec({ |
195
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client_id => { required => 1, defined => 1 }, |
196
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client_secret => { required => 1, defined => 1 }, |
197
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library_id => { required => 0, defined => 1 }, |
198
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access_token => { required => 0 }, |
199
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access_token_type => { required => 0 }, |
200
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user_agent => { required => 0 }, |
201
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user_agent_params => { required => 0 }, |
202
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}); |
203
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204
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sub BUILDARGS { |
205
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2
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2
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0
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973
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my $self = shift; |
206
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2
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50
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10
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my $params = shift || {}; |
207
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2
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100
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9
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if (!ref( $params )) { |
208
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1
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5
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$params = {$params, @_}; |
209
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} |
210
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211
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2
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5
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local $Params::Check::WARNINGS_FATAL = 1; |
212
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2
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50
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7
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$params = Params::Check::check($self->_get_param_spec, $params) |
213
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or croak "Invalid parameters: ".Params::Check::last_error(); |
214
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2
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428
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return $params; |
215
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} |
216
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217
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sub BUILD { |
218
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2
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2
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0
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51
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my $self = shift; |
219
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2
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3
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my $params = shift; |
220
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221
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2
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50
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11
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my $ua_params = delete $params->{user_agent_params} || {}; |
222
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2
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50
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45
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$self->user_agent( LWP::UserAgent->new(%$ua_params) ) unless $self->user_agent; |
223
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2
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2361
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delete $self->{user_agent_params}; |
224
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} |
225
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226
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=head1 ATTRIBUTES |
227
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228
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=head2 user_agent |
229
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230
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As provided to constructor, or auto created. Useful if one wants to |
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change user agent attributes on the fly, eg |
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$ils->user_agent->timeout(120); |
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=head1 DISCOVERY METHODS |
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=head2 search ($params_hashref) |
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=head3 Input params: |
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=over 12 |
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=item C => query (search) string |
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=item C => number of items per results page |
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=item C => wanted page number |
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=item C => resultset sort option (see below) |
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=back |
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Sort options are either an array or a comma separated string of options: |
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=over 12 |
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=item C => date title was published |
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=item C => date title became available for users |
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=item C => number of items per results page |
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=back |
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Sort order can be added after option with ":", eg |
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"publication_date:desc,rating:desc" |
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=head3 Returns search results record: |
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=over 12 |
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=item C => an array of item records |
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=item C => number of items per results page |
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=item C => results page number |
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=item C => total number of pages |
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=item C => total number of items found by the search |
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282
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=back |
283
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284
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=head2 item_metadata ($item_id) |
285
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286
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=head3 Returns item record |
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288
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=head2 item_availability ($item_id) |
289
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290
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=head3 Returns item availability record: |
291
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292
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=over 12 |
293
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294
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=item C |
295
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296
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=item C => boolean |
297
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298
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=item C => number of copies available |
299
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300
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=item C => number of copies owned |
301
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302
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=item C => availability type, provider dependant |
303
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304
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=back |
305
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306
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Not all fields are available for all service providers. |
307
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For example, some will provide "copies_available", making "available" |
308
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redundant, whereas others will just provide "available". |
309
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310
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=head2 is_item_available ($item_id) |
311
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312
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=head3 Returns boolean |
313
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314
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Simplified version of L |
315
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316
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=cut |
317
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318
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sub search { |
319
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0
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0
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1
|
|
die "search() not implemented"; |
320
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} |
321
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322
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# relevancy availability available_date title author popularity rating price publisher publication_date |
323
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sub _parse_sort_string { |
324
|
0
|
|
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0
|
|
|
my $self = shift; |
325
|
0
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0
|
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|
|
my $sort = shift or croak "No sort options"; |
326
|
0
|
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0
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|
|
my $xlate_table = shift || {}; |
327
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0
|
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|
my $camelise = shift; |
328
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329
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0
|
0
|
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|
|
$sort = [split /\s*,\s*/, $sort] unless ref $sort; |
330
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331
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0
|
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|
|
foreach (@$sort) { |
332
|
0
|
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|
|
my ($s,$d) = split ':'; |
333
|
0
|
0
|
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|
|
if (exists $xlate_table->{$s}) { |
334
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0
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0
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|
|
next unless $xlate_table->{$s}; |
335
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0
|
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|
|
$_ = $xlate_table->{$s}; |
336
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} |
337
|
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|
else { |
338
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0
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|
|
$_ = $s; |
339
|
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|
|
} |
340
|
|
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|
|
# join('', map{ ucfirst $_ } split(/(?<=[A-Za-z])_(?=[A-Za-z])|\b/, $s)); |
341
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0
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0
|
|
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|
|
$_ = join '', map ucfirst, split /(?<=[A-Za-z])_(?=[A-Za-z])|\b/ if $camelise; |
342
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0
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0
|
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|
|
$_ = "$_:$d" if $d; |
343
|
|
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|
|
|
|
} |
344
|
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345
|
0
|
|
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|
|
|
return $sort; |
346
|
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|
|
|
} |
347
|
|
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348
|
|
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|
|
|
|
sub item_metadata { |
349
|
0
|
|
|
0
|
1
|
|
die "item_metadata() not implemented"; |
350
|
|
|
|
|
|
|
} |
351
|
|
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|
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|
|
352
|
|
|
|
|
|
|
sub item_availability { |
353
|
0
|
|
|
0
|
1
|
|
die "item_availability() not implemented"; |
354
|
|
|
|
|
|
|
} |
355
|
|
|
|
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|
|
|
356
|
|
|
|
|
|
|
=head1 INDIVIDUAL USER AUTHENTICATION AND METHODS |
357
|
|
|
|
|
|
|
|
358
|
|
|
|
|
|
|
=head2 user_id / password |
359
|
|
|
|
|
|
|
|
360
|
|
|
|
|
|
|
Provider authentication API is used to get an authorized session. |
361
|
|
|
|
|
|
|
|
362
|
|
|
|
|
|
|
=head3 auth_by_user_id($user_id, $password) |
363
|
|
|
|
|
|
|
|
364
|
|
|
|
|
|
|
An example: |
365
|
|
|
|
|
|
|
|
366
|
|
|
|
|
|
|
my $ils = WebService::ILS::Provider({ |
367
|
|
|
|
|
|
|
client_id => $client_id, |
368
|
|
|
|
|
|
|
client_secret => $client_secret, |
369
|
|
|
|
|
|
|
}); |
370
|
|
|
|
|
|
|
eval { $ils->auth_by_user_id( $user_id, $password ) }; |
371
|
|
|
|
|
|
|
if ($@) { some_error_handling(); return; } |
372
|
|
|
|
|
|
|
$session{ils_access_token} = $ils->access_token; |
373
|
|
|
|
|
|
|
$session{ils_access_token_type} = $ils->access_token_type; |
374
|
|
|
|
|
|
|
... |
375
|
|
|
|
|
|
|
Somewhere else in your app: |
376
|
|
|
|
|
|
|
my $ils = WebService::ILS::Provider({ |
377
|
|
|
|
|
|
|
client_id => $client_id, |
378
|
|
|
|
|
|
|
client_secret => $client_secret, |
379
|
|
|
|
|
|
|
access_token => $session{ils_access_token}, |
380
|
|
|
|
|
|
|
access_token_type => $session{ils_access_token_type}, |
381
|
|
|
|
|
|
|
}); |
382
|
|
|
|
|
|
|
|
383
|
|
|
|
|
|
|
my $checkouts = $ils->checkouts; |
384
|
|
|
|
|
|
|
|
385
|
|
|
|
|
|
|
=head2 Authentication at the provider |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
User is redirected to the provider authentication url, and after |
388
|
|
|
|
|
|
|
authenticating at the provider redirected back with some kind of auth token. |
389
|
|
|
|
|
|
|
Requires url to handle return redirect from the provider. |
390
|
|
|
|
|
|
|
|
391
|
|
|
|
|
|
|
It can be used as an alternative to FB and Google auth. |
392
|
|
|
|
|
|
|
|
393
|
|
|
|
|
|
|
This is just to give an idea, specifics heavily depend on the provider |
394
|
|
|
|
|
|
|
|
395
|
|
|
|
|
|
|
=head3 auth_url ($redirect_back_uri) |
396
|
|
|
|
|
|
|
|
397
|
|
|
|
|
|
|
Returns provider authentication url to redirect to |
398
|
|
|
|
|
|
|
|
399
|
|
|
|
|
|
|
=head3 auth_token_param_name () |
400
|
|
|
|
|
|
|
|
401
|
|
|
|
|
|
|
Returns auth code url param name |
402
|
|
|
|
|
|
|
|
403
|
|
|
|
|
|
|
=head3 auth_by_token ($provider_token) |
404
|
|
|
|
|
|
|
|
405
|
|
|
|
|
|
|
An example: |
406
|
|
|
|
|
|
|
|
407
|
|
|
|
|
|
|
my $ils = WebService::ILS::Provider({ |
408
|
|
|
|
|
|
|
client_id => $client_id, |
409
|
|
|
|
|
|
|
client_secret => $client_secret, |
410
|
|
|
|
|
|
|
}); |
411
|
|
|
|
|
|
|
my $redirect_url = $ils->auth_url("http://myapp.com/ils-auth"); |
412
|
|
|
|
|
|
|
$response->redirect($redirect_url); |
413
|
|
|
|
|
|
|
... |
414
|
|
|
|
|
|
|
After successful authentication at the provider, provider redirects |
415
|
|
|
|
|
|
|
back to specified app url (http://myapp.com/ils-auth) |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
/ils-auth handler: |
418
|
|
|
|
|
|
|
my $auth_token = $req->param( $ils->auth_token_param_name ) |
419
|
|
|
|
|
|
|
or some_error_handling(), return; |
420
|
|
|
|
|
|
|
local $@; |
421
|
|
|
|
|
|
|
eval { $ils->auth_by_token( $auth_token ) }; |
422
|
|
|
|
|
|
|
if ($@) { some_error_handling(); return; } |
423
|
|
|
|
|
|
|
$session{ils_access_token} = $ils->access_token; |
424
|
|
|
|
|
|
|
$session{ils_access_token_type} = $ils->access_token_type; |
425
|
|
|
|
|
|
|
... |
426
|
|
|
|
|
|
|
Somewhere else in your app: |
427
|
|
|
|
|
|
|
passing access token to the constructor as above |
428
|
|
|
|
|
|
|
|
429
|
|
|
|
|
|
|
=cut |
430
|
|
|
|
|
|
|
|
431
|
|
|
|
|
|
|
=head1 CIRCULATION METHODS |
432
|
|
|
|
|
|
|
|
433
|
|
|
|
|
|
|
=head2 patron () |
434
|
|
|
|
|
|
|
|
435
|
|
|
|
|
|
|
=head3 Returns patron record: |
436
|
|
|
|
|
|
|
|
437
|
|
|
|
|
|
|
=over 12 |
438
|
|
|
|
|
|
|
|
439
|
|
|
|
|
|
|
=item C |
440
|
|
|
|
|
|
|
|
441
|
|
|
|
|
|
|
=item C => boolean |
442
|
|
|
|
|
|
|
|
443
|
|
|
|
|
|
|
=item C => number of copies available |
444
|
|
|
|
|
|
|
|
445
|
|
|
|
|
|
|
=item C => number of checkouts allowed |
446
|
|
|
|
|
|
|
|
447
|
|
|
|
|
|
|
=item C => number of holds allowed |
448
|
|
|
|
|
|
|
|
449
|
|
|
|
|
|
|
=back |
450
|
|
|
|
|
|
|
|
451
|
|
|
|
|
|
|
=head2 holds () |
452
|
|
|
|
|
|
|
|
453
|
|
|
|
|
|
|
=head3 Returns holds record: |
454
|
|
|
|
|
|
|
|
455
|
|
|
|
|
|
|
=over 12 |
456
|
|
|
|
|
|
|
|
457
|
|
|
|
|
|
|
=item C => number of items on hold |
458
|
|
|
|
|
|
|
|
459
|
|
|
|
|
|
|
=item C => list of individual items |
460
|
|
|
|
|
|
|
|
461
|
|
|
|
|
|
|
=back |
462
|
|
|
|
|
|
|
|
463
|
|
|
|
|
|
|
In addition to Item record fields described above, |
464
|
|
|
|
|
|
|
item records will have: |
465
|
|
|
|
|
|
|
|
466
|
|
|
|
|
|
|
=over 12 |
467
|
|
|
|
|
|
|
|
468
|
|
|
|
|
|
|
=item C => hold timestamp, with or without timezone |
469
|
|
|
|
|
|
|
|
470
|
|
|
|
|
|
|
=item C => user's position in the waiting queue, |
471
|
|
|
|
|
|
|
if available |
472
|
|
|
|
|
|
|
|
473
|
|
|
|
|
|
|
=back |
474
|
|
|
|
|
|
|
|
475
|
|
|
|
|
|
|
=head2 place_hold ($item_id) |
476
|
|
|
|
|
|
|
|
477
|
|
|
|
|
|
|
=head3 Returns holds item record (as described above) |
478
|
|
|
|
|
|
|
|
479
|
|
|
|
|
|
|
In addition, C field will be incorported as well. |
480
|
|
|
|
|
|
|
|
481
|
|
|
|
|
|
|
=head2 remove_hold ($item_id) |
482
|
|
|
|
|
|
|
|
483
|
|
|
|
|
|
|
=head3 Returns true to indicate success |
484
|
|
|
|
|
|
|
|
485
|
|
|
|
|
|
|
Returns true in case user does not have a hold on the item. |
486
|
|
|
|
|
|
|
Throws exception in case of any other failure. |
487
|
|
|
|
|
|
|
|
488
|
|
|
|
|
|
|
=head2 checkouts () |
489
|
|
|
|
|
|
|
|
490
|
|
|
|
|
|
|
=head3 Returns checkout record: |
491
|
|
|
|
|
|
|
|
492
|
|
|
|
|
|
|
=over 12 |
493
|
|
|
|
|
|
|
|
494
|
|
|
|
|
|
|
=item C => number of items on hold |
495
|
|
|
|
|
|
|
|
496
|
|
|
|
|
|
|
=item C => list of individual items |
497
|
|
|
|
|
|
|
|
498
|
|
|
|
|
|
|
=back |
499
|
|
|
|
|
|
|
|
500
|
|
|
|
|
|
|
In addition to Item record fields described above, |
501
|
|
|
|
|
|
|
item records will have: |
502
|
|
|
|
|
|
|
|
503
|
|
|
|
|
|
|
=over 12 |
504
|
|
|
|
|
|
|
|
505
|
|
|
|
|
|
|
=item C => checkout timestamp, with or without timezone |
506
|
|
|
|
|
|
|
|
507
|
|
|
|
|
|
|
=item C => date (time) checkout expires |
508
|
|
|
|
|
|
|
|
509
|
|
|
|
|
|
|
=item C => download/stream url |
510
|
|
|
|
|
|
|
|
511
|
|
|
|
|
|
|
=item C => an arrayref of downloadable file details |
512
|
|
|
|
|
|
|
title, url, size |
513
|
|
|
|
|
|
|
|
514
|
|
|
|
|
|
|
=back |
515
|
|
|
|
|
|
|
|
516
|
|
|
|
|
|
|
=head2 checkout ($item_id) |
517
|
|
|
|
|
|
|
|
518
|
|
|
|
|
|
|
=head3 Returns checkout item record (as described above) |
519
|
|
|
|
|
|
|
|
520
|
|
|
|
|
|
|
In addition, C field will be incorported as well. |
521
|
|
|
|
|
|
|
|
522
|
|
|
|
|
|
|
=head2 return ($item_id) |
523
|
|
|
|
|
|
|
|
524
|
|
|
|
|
|
|
=head3 Returns true to indicate success |
525
|
|
|
|
|
|
|
|
526
|
|
|
|
|
|
|
Returns true in case user does not have the item checked out. |
527
|
|
|
|
|
|
|
Throws exception in case of any other failure. |
528
|
|
|
|
|
|
|
|
529
|
|
|
|
|
|
|
=cut |
530
|
|
|
|
|
|
|
|
531
|
|
|
|
|
|
|
=head1 NATIVE METHODS |
532
|
|
|
|
|
|
|
|
533
|
|
|
|
|
|
|
All Discovery and Circulation methods (with exception of remove_hold() |
534
|
|
|
|
|
|
|
and return(), where it does not make sense) have native_*() counterparts, |
535
|
|
|
|
|
|
|
eg native_search(), native_item_availability(), native_checkout() etc. |
536
|
|
|
|
|
|
|
|
537
|
|
|
|
|
|
|
In case of single item methods, native_item_availability(), |
538
|
|
|
|
|
|
|
native_checkout() etc, they take item_id as parameter. Otherwise, it's a |
539
|
|
|
|
|
|
|
hashref of HTTP request params (GET or POST). |
540
|
|
|
|
|
|
|
|
541
|
|
|
|
|
|
|
Return value is a record as returned by API. |
542
|
|
|
|
|
|
|
|
543
|
|
|
|
|
|
|
Individual provider subclasses provide additional provider specific |
544
|
|
|
|
|
|
|
native methods. |
545
|
|
|
|
|
|
|
|
546
|
|
|
|
|
|
|
=head1 UTILITY METHODS |
547
|
|
|
|
|
|
|
|
548
|
|
|
|
|
|
|
=head2 Error constants |
549
|
|
|
|
|
|
|
|
550
|
|
|
|
|
|
|
=over 4 |
551
|
|
|
|
|
|
|
|
552
|
|
|
|
|
|
|
=item C |
553
|
|
|
|
|
|
|
|
554
|
|
|
|
|
|
|
=item C |
555
|
|
|
|
|
|
|
|
556
|
|
|
|
|
|
|
=back |
557
|
|
|
|
|
|
|
|
558
|
|
|
|
|
|
|
=cut |
559
|
|
|
|
|
|
|
|
560
|
5
|
|
|
5
|
|
5792
|
use constant ERROR_ACCESS_TOKEN => "Error: Authorization Failed"; |
|
5
|
|
|
|
|
11
|
|
|
5
|
|
|
|
|
312
|
|
561
|
5
|
|
|
5
|
|
31
|
use constant ERROR_NOT_AUTHENTICATED => "Error: User Not Authenticated"; |
|
5
|
|
|
|
|
12
|
|
|
5
|
|
|
|
|
6570
|
|
562
|
|
|
|
|
|
|
|
563
|
|
|
|
|
|
|
sub invalid_response_exception_string { |
564
|
0
|
|
|
0
|
0
|
|
my $self = shift; |
565
|
0
|
|
|
|
|
|
my $response = shift; |
566
|
|
|
|
|
|
|
|
567
|
0
|
|
|
|
|
|
return join "\n", |
568
|
|
|
|
|
|
|
$response->message, |
569
|
|
|
|
|
|
|
"Request:" => $response->request->as_string, |
570
|
|
|
|
|
|
|
"Response:" => $response->as_string |
571
|
|
|
|
|
|
|
; |
572
|
|
|
|
|
|
|
} |
573
|
|
|
|
|
|
|
|
574
|
|
|
|
|
|
|
sub check_response { |
575
|
0
|
|
|
0
|
0
|
|
my $self = shift; |
576
|
0
|
|
|
|
|
|
my $response = shift; |
577
|
|
|
|
|
|
|
|
578
|
0
|
0
|
|
|
|
|
die $self->invalid_response_exception_string($response) unless $response->is_success; |
579
|
|
|
|
|
|
|
} |
580
|
|
|
|
|
|
|
|
581
|
|
|
|
|
|
|
=head2 error_message ($exception_string) |
582
|
|
|
|
|
|
|
|
583
|
|
|
|
|
|
|
=head3 Returns error message probably suitable for displaying to the user |
584
|
|
|
|
|
|
|
|
585
|
|
|
|
|
|
|
Example: |
586
|
|
|
|
|
|
|
|
587
|
|
|
|
|
|
|
my $res = eval { $ils->checkout($id) }; |
588
|
|
|
|
|
|
|
if ($@) { |
589
|
|
|
|
|
|
|
my $msg = $ils->error_message($@); |
590
|
|
|
|
|
|
|
display($msg); |
591
|
|
|
|
|
|
|
log_error($@); |
592
|
|
|
|
|
|
|
} |
593
|
|
|
|
|
|
|
|
594
|
|
|
|
|
|
|
=head2 is_access_token_error ($exception_string) |
595
|
|
|
|
|
|
|
|
596
|
|
|
|
|
|
|
=head3 Returns true if the error is access token related |
597
|
|
|
|
|
|
|
|
598
|
|
|
|
|
|
|
=head2 is_not_authenticated_error ($exception_string) |
599
|
|
|
|
|
|
|
|
600
|
|
|
|
|
|
|
=head3 Returns true if the error is "Not authenticated" |
601
|
|
|
|
|
|
|
|
602
|
|
|
|
|
|
|
=cut |
603
|
|
|
|
|
|
|
|
604
|
|
|
|
|
|
|
sub error_message { |
605
|
0
|
|
|
0
|
1
|
|
my $self = shift; |
606
|
0
|
0
|
|
|
|
|
my $die_string = shift or return; |
607
|
0
|
|
|
|
|
|
$die_string =~ m/(.*?)\n/o; |
608
|
0
|
|
0
|
|
|
|
(my $msg = $1 || $die_string) =~ s! at /.* line \d+\.$!!; |
609
|
0
|
|
|
|
|
|
return $msg; |
610
|
|
|
|
|
|
|
} |
611
|
|
|
|
|
|
|
|
612
|
|
|
|
|
|
|
sub is_access_token_error { |
613
|
0
|
|
|
0
|
1
|
|
my $self = shift; |
614
|
0
|
0
|
|
|
|
|
my $die_string = shift or croak "No error message"; |
615
|
0
|
|
|
|
|
|
return $self->error_message($die_string) eq ERROR_ACCESS_TOKEN; |
616
|
|
|
|
|
|
|
} |
617
|
|
|
|
|
|
|
|
618
|
|
|
|
|
|
|
sub is_not_authenticated_error { |
619
|
0
|
|
|
0
|
1
|
|
my $self = shift; |
620
|
0
|
0
|
|
|
|
|
my $die_string = shift or croak "No error message"; |
621
|
0
|
|
|
|
|
|
return $self->error_message($die_string) eq ERROR_NOT_AUTHENTICATED; |
622
|
|
|
|
|
|
|
} |
623
|
|
|
|
|
|
|
|
624
|
|
|
|
|
|
|
# Client access authorization |
625
|
|
|
|
|
|
|
# |
626
|
|
|
|
|
|
|
sub _request_with_auth { |
627
|
0
|
|
|
0
|
|
|
my $self = shift; |
628
|
0
|
0
|
|
|
|
|
my $request = shift or croak "No request"; |
629
|
|
|
|
|
|
|
|
630
|
0
|
|
|
|
|
|
my $has_token = $self->access_token; |
631
|
0
|
|
|
|
|
|
my $response = $self->_request_with_token($request); |
632
|
|
|
|
|
|
|
# token expired? |
633
|
0
|
0
|
0
|
|
|
|
$response = $self->_request_with_token($request, "FRESH TOKEN") |
634
|
|
|
|
|
|
|
if $response->code == HTTP_UNAUTHORIZED && $has_token; |
635
|
0
|
|
|
|
|
|
return $response; |
636
|
|
|
|
|
|
|
} |
637
|
|
|
|
|
|
|
|
638
|
|
|
|
|
|
|
sub make_access_token_request { |
639
|
0
|
|
|
0
|
0
|
|
die "make_access_token_request() not implemented"; |
640
|
|
|
|
|
|
|
} |
641
|
|
|
|
|
|
|
|
642
|
|
|
|
|
|
|
sub _request_access_token { |
643
|
0
|
|
|
0
|
|
|
my $self = shift; |
644
|
0
|
0
|
|
|
|
|
my $request = shift or croak "No request"; |
645
|
|
|
|
|
|
|
|
646
|
0
|
|
|
|
|
|
$request->header( |
647
|
|
|
|
|
|
|
Authorization => "Basic " . $self->_access_auth_string |
648
|
|
|
|
|
|
|
); |
649
|
|
|
|
|
|
|
|
650
|
0
|
|
|
|
|
|
my $response = $self->user_agent->request( $request ); |
651
|
|
|
|
|
|
|
# XXX check content type |
652
|
|
|
|
|
|
|
return $self->process_json_response( |
653
|
|
|
|
|
|
|
$response, |
654
|
|
|
|
|
|
|
sub { |
655
|
0
|
|
|
0
|
|
|
my ($data) = @_; |
656
|
|
|
|
|
|
|
|
657
|
0
|
|
|
|
|
|
my ($token, $token_type) = $self->_extract_token_from_response($data); |
658
|
0
|
0
|
|
|
|
|
$token or die "No access token\n"; |
659
|
0
|
|
|
|
|
|
$self->access_token($token); |
660
|
0
|
|
0
|
|
|
|
$self->access_token_type($token_type || 'Bearer'); |
661
|
0
|
|
|
|
|
|
return $data; |
662
|
|
|
|
|
|
|
}, |
663
|
|
|
|
|
|
|
sub { |
664
|
0
|
|
|
0
|
|
|
my ($data) = @_; |
665
|
|
|
|
|
|
|
|
666
|
0
|
|
0
|
|
|
|
die join "\n", ERROR_ACCESS_TOKEN, $self->_error_from_json($data) || $response->decoded_content; |
667
|
|
|
|
|
|
|
} |
668
|
0
|
|
|
|
|
|
); |
669
|
|
|
|
|
|
|
} |
670
|
|
|
|
|
|
|
|
671
|
|
|
|
|
|
|
sub _access_auth_string { |
672
|
0
|
|
|
0
|
|
|
my $self = shift; |
673
|
0
|
|
|
|
|
|
return MIME::Base64::encode( join(":", $self->client_id, $self->client_secret) ); |
674
|
|
|
|
|
|
|
} |
675
|
|
|
|
|
|
|
|
676
|
|
|
|
|
|
|
sub _extract_token_from_response { |
677
|
0
|
|
|
0
|
|
|
my $self = shift; |
678
|
0
|
|
|
|
|
|
my $data = shift; |
679
|
|
|
|
|
|
|
|
680
|
0
|
|
|
|
|
|
return ($data->{access_token}, $data->{token_type}); |
681
|
|
|
|
|
|
|
} |
682
|
|
|
|
|
|
|
|
683
|
|
|
|
|
|
|
sub _request_with_token { |
684
|
0
|
|
|
0
|
|
|
my $self = shift; |
685
|
0
|
0
|
|
|
|
|
my $request = shift or croak "No request"; |
686
|
0
|
|
|
|
|
|
my $force_fresh = shift; |
687
|
|
|
|
|
|
|
|
688
|
0
|
0
|
|
|
|
|
my $token = $force_fresh ? undef : $self->access_token; |
689
|
0
|
0
|
|
|
|
|
unless ($token) { |
690
|
0
|
|
|
|
|
|
my $request = $self->make_access_token_request; |
691
|
0
|
|
|
|
|
|
$self->_request_access_token($request); |
692
|
0
|
|
|
|
|
|
$token = $self->access_token; |
693
|
|
|
|
|
|
|
} |
694
|
0
|
0
|
|
|
|
|
die "No access token" unless $token; |
695
|
0
|
|
|
|
|
|
my $token_type = $self->access_token_type; |
696
|
|
|
|
|
|
|
|
697
|
0
|
|
|
|
|
|
$request->header( Authorization => "$token_type $token" ); |
698
|
0
|
|
|
|
|
|
return $self->user_agent->request( $request ); |
699
|
|
|
|
|
|
|
} |
700
|
|
|
|
|
|
|
|
701
|
|
|
|
|
|
|
# Strictly speaking process_json_response() and process_json_error_response() |
702
|
|
|
|
|
|
|
# should go to ::JSON. However, JSON is used for authentication services even for |
703
|
|
|
|
|
|
|
# APIs that are XML, so need to be available |
704
|
|
|
|
|
|
|
sub process_json_response { |
705
|
0
|
|
|
0
|
0
|
|
my $self = shift; |
706
|
0
|
0
|
|
|
|
|
my $response = shift or croak "No response"; |
707
|
0
|
|
|
|
|
|
my $success_callback = shift; |
708
|
0
|
|
|
|
|
|
my $error_callback = shift; |
709
|
|
|
|
|
|
|
|
710
|
0
|
0
|
|
|
|
|
unless ($response->is_success) { |
711
|
0
|
|
|
|
|
|
return $self->process_json_error_response($response, $error_callback); |
712
|
|
|
|
|
|
|
} |
713
|
|
|
|
|
|
|
|
714
|
0
|
|
|
|
|
|
my $content_type = $response->header('Content-Type'); |
715
|
0
|
0
|
0
|
|
|
|
die "Invalid Content-Type\n".$response->as_string |
716
|
|
|
|
|
|
|
unless $content_type && $content_type =~ m!application/json!; |
717
|
0
|
0
|
|
|
|
|
my $content = $response->decoded_content |
718
|
|
|
|
|
|
|
or die $self->invalid_response_exception_string($response); |
719
|
|
|
|
|
|
|
|
720
|
0
|
|
|
|
|
|
local $@; |
721
|
|
|
|
|
|
|
|
722
|
0
|
0
|
|
|
|
|
my $data = $content ? eval { from_json( $content ) } : {}; |
|
0
|
|
|
|
|
|
|
723
|
0
|
0
|
|
|
|
|
die "$@\nResponse:\n".$response->as_string if $@; |
724
|
|
|
|
|
|
|
|
725
|
0
|
0
|
|
|
|
|
return $data unless $success_callback; |
726
|
|
|
|
|
|
|
|
727
|
0
|
|
|
|
|
|
my $res = eval { |
728
|
0
|
|
|
|
|
|
$success_callback->($data); |
729
|
|
|
|
|
|
|
}; |
730
|
0
|
0
|
|
|
|
|
die "$@\nResponse:\n$content" if $@; |
731
|
0
|
|
|
|
|
|
return $res; |
732
|
|
|
|
|
|
|
} |
733
|
|
|
|
|
|
|
|
734
|
|
|
|
|
|
|
sub process_json_error_response { |
735
|
0
|
|
|
0
|
0
|
|
my $self = shift; |
736
|
0
|
0
|
|
|
|
|
my $response = shift or croak "No response"; |
737
|
0
|
|
|
|
|
|
my $error_callback = shift; |
738
|
|
|
|
|
|
|
|
739
|
0
|
|
|
|
|
|
my $content_type = $response->header('Content-Type'); |
740
|
0
|
0
|
0
|
|
|
|
if ($content_type && $content_type =~ m!application/json!) { |
741
|
0
|
0
|
|
|
|
|
my $content = $response->decoded_content |
742
|
|
|
|
|
|
|
or die $self->invalid_response_exception_string($response); |
743
|
|
|
|
|
|
|
|
744
|
0
|
|
|
|
|
|
my $data = eval { from_json( $content ) }; |
|
0
|
|
|
|
|
|
|
745
|
0
|
0
|
0
|
|
|
|
die $content || $self->invalid_response_exception_string($response) if $@; |
746
|
|
|
|
|
|
|
|
747
|
0
|
0
|
|
|
|
|
if ($error_callback) { |
748
|
0
|
|
|
|
|
|
return $error_callback->($data); |
749
|
|
|
|
|
|
|
} |
750
|
|
|
|
|
|
|
|
751
|
0
|
|
0
|
|
|
|
die $self->_error_from_json($data) || "Invalid response:\n$content"; |
752
|
|
|
|
|
|
|
} |
753
|
0
|
|
|
|
|
|
die $self->invalid_response_exception_string($response); |
754
|
|
|
|
|
|
|
} |
755
|
|
|
|
|
|
|
|
756
|
|
|
|
0
|
|
|
sub _error_from_json {}; |
757
|
|
|
|
|
|
|
|
758
|
|
|
|
|
|
|
# wrapper around error response handlers to include some debugging if the debug flag is set |
759
|
|
|
|
|
|
|
sub _error_result { |
760
|
0
|
|
|
0
|
|
|
my $self = shift; |
761
|
0
|
0
|
|
|
|
|
my $process_sub = shift or croak "No process sub"; |
762
|
0
|
0
|
|
|
|
|
my $request = shift or croak "No HTTP request"; |
763
|
0
|
0
|
|
|
|
|
my $response = shift or croak "No HTTP response"; |
764
|
|
|
|
|
|
|
|
765
|
0
|
0
|
|
|
|
|
return $process_sub->() unless $DEBUG; |
766
|
|
|
|
|
|
|
|
767
|
0
|
|
|
|
|
|
local $@; |
768
|
0
|
|
|
|
|
|
my $ret = eval { $process_sub->() }; |
|
0
|
|
|
|
|
|
|
769
|
0
|
0
|
|
|
|
|
die join "\n", $@, "Request:", $request->as_string, "Response:", $response->as_string |
770
|
|
|
|
|
|
|
if $@; |
771
|
0
|
|
|
|
|
|
return $ret; |
772
|
|
|
|
|
|
|
} |
773
|
|
|
|
|
|
|
|
774
|
|
|
|
|
|
|
sub _result_xlate { |
775
|
0
|
|
|
0
|
|
|
my $self = shift; |
776
|
0
|
|
|
|
|
|
my $res = shift; |
777
|
0
|
|
|
|
|
|
my $xlate_table = shift; |
778
|
|
|
|
|
|
|
|
779
|
|
|
|
|
|
|
return { |
780
|
|
|
|
|
|
|
map { |
781
|
0
|
|
|
|
|
|
my $val = $res->{$_}; |
|
0
|
|
|
|
|
|
|
782
|
0
|
0
|
|
|
|
|
defined($val) ? ($xlate_table->{$_} => $val) : () |
783
|
|
|
|
|
|
|
} keys %$xlate_table |
784
|
|
|
|
|
|
|
}; |
785
|
|
|
|
|
|
|
} |
786
|
|
|
|
|
|
|
|
787
|
|
|
|
|
|
|
|
788
|
|
|
|
|
|
|
=head1 TODO |
789
|
|
|
|
|
|
|
|
790
|
|
|
|
|
|
|
Federated search |
791
|
|
|
|
|
|
|
|
792
|
|
|
|
|
|
|
=cut |
793
|
|
|
|
|
|
|
|
794
|
|
|
|
|
|
|
1; |
795
|
|
|
|
|
|
|
|
796
|
|
|
|
|
|
|
__END__ |