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1
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package FB3::Validator; |
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3
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=head1 NAME |
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5
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FB3::Validator - check file to be a valid FB3 book |
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6
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7
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=head1 SYNOPSIS |
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9
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my $Validator = FB3::Validator->new; |
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10
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if( my $ValidationError = $Validator->Validate( "path/to/book.fb3" )) { |
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11
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die "path/to/book.fb3 is not a valid FB3: $ValidationError"; |
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12
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} |
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13
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14
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=cut |
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15
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16
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1
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1
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1434
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use strict; |
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3
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1
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31
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17
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12
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use OPC; |
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1
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21
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18
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1
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5
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use XML::LibXML; |
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2
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1
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9
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19
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1
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1
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215
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use FB3; |
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1
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1
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1
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53
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20
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21
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our $XSD_DIR; |
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22
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23
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use constant { |
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1
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126
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RELATION_TYPE_CORE_PROPERTIES => |
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25
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'http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties', |
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26
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RELATION_TYPE_FB3_BOOK => |
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27
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'http://www.fictionbook.org/FictionBook3/relationships/Book', |
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28
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RELATION_TYPE_FB3_BODY => |
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29
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'http://www.fictionbook.org/FictionBook3/relationships/body', |
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30
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1
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1
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7
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}; |
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1
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1
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31
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32
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use constant { |
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33
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1
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1663
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CORE_PROPERTIES_CT => 'application/vnd.openxmlformats-package.core-properties+xml', |
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34
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RELATIONSHIPS_CT => 'application/vnd.openxmlformats-package.relationships+xml', |
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35
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1
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1
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7
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}; |
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1
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2
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36
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37
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sub new { |
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38
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0
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0
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0
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my( $class, $XSD_DIR ) = @_; |
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39
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0
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0
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$XSD_DIR //= FB3::SchemasDirPath(); # in development purposes it maybe |
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40
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# convenient to use some other schemas path |
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41
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42
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0
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my $Validator = { |
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43
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xsd_dir => $XSD_DIR, |
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44
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}; |
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45
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46
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0
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bless $Validator, $class; |
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47
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48
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0
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return $Validator; |
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49
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} |
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50
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51
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# Возвращает пустую строку в случае успеха, иначе - текст ошибки |
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52
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sub Validate { |
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53
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0
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0
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0
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my( $self, $FileName ) = @_; |
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54
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55
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0
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my $XSD_DIR = $self->{xsd_dir}; |
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56
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57
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# Проверка, что файл - валидный ZIP архив |
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58
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59
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0
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my $Package = eval{ OPC->new( $FileName ) }; |
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0
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60
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0
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0
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return $@ if( $@ ); |
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61
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62
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0
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my %Namespaces = ( |
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63
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opcr => 'http://schemas.openxmlformats.org/package/2006/relationships', |
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64
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); |
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65
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0
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my $XPC = XML::LibXML::XPathContext->new(); |
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66
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0
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$XPC->registerNs( $_ => $Namespaces{$_} ) for keys %Namespaces; |
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67
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68
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# Находим Content Types Stream, проверяем валидность |
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69
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70
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0
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my $CtXML = $Package->GetContentTypesXML; |
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71
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0
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0
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unless( $CtXML ) { |
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72
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0
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return "Content Types part not found"; |
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73
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} |
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74
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0
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my $CtSchema = XML::LibXML::Schema->new( location => |
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75
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"$XSD_DIR/opc-contentTypes.xsd" ); |
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76
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0
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my $CtDoc; |
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77
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0
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eval { |
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78
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0
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$CtDoc = XML::LibXML->new()->parse_string( $CtXML ); |
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79
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0
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$CtSchema->validate( $CtDoc ); |
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80
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}; |
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81
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0
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0
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if( $@ ) { |
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82
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0
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return "Content Types part contains invalid XML or is invalid against ". |
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83
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"XSD schema:\n$@"; |
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84
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} |
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85
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86
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# Находим все части, описывающие связи (Relationships). |
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87
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88
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0
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my @ValidPartNames = grep IsValidPartName($_), $Package->PartNames; |
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89
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90
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0
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my @RelsPartNames; |
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91
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0
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for my $PartName ( @ValidPartNames ) { |
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92
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0
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my( $SourceDir, $SourceFileName ) = _SourceByRelsPartName( $PartName ); |
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93
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0
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0
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0
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if( defined $SourceDir && defined $SourceFileName ) { |
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94
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0
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my $SourcePartName = $SourceDir.$SourceFileName; |
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95
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96
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0
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0
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0
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if( $SourcePartName eq "/" # источник - сам архив |
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97
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|| grep $SourcePartName eq $_, @ValidPartNames # источник есть в архиве |
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98
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) { |
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99
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100
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0
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0
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push @RelsPartNames, $PartName unless grep $PartName eq $_, @RelsPartNames; |
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101
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} |
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102
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} |
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103
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} |
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104
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105
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# Проверки частей, описывающих связи |
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106
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107
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0
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my $PackageRelsDoc; # заодно находим часть с Package Relationships |
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108
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my @PartNames; # заодно собираем названия всех частей, связи с которыми прописаны |
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109
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110
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0
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my $RelsSchema = XML::LibXML::Schema->new( location => "$XSD_DIR/opc-relationships.xsd" ); |
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111
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112
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0
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for my $RelsPartName ( @RelsPartNames ) { |
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113
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114
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# Проверка части на соответствие opc-relationships.xsd |
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115
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116
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0
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my $RelsDoc; |
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117
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0
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my $RelsPartXML = $Package->PartContents( $RelsPartName ); |
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118
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0
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eval { |
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119
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0
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$RelsDoc = XML::LibXML->new()->parse_string( $RelsPartXML ); |
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120
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0
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$RelsSchema->validate( $RelsDoc ); |
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121
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}; |
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122
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0
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0
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if( $@ ) { |
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123
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0
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return $RelsPartName." is not a valid XML or is not valid against ". |
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124
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"opc-relationships.xsd:\n$@"; |
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125
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} |
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126
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127
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# У Relationships частей должен быть соответствующий Content Type |
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128
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129
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0
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0
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unless( $Package->PartContentType( $RelsPartName ) eq RELATIONSHIPS_CT ) { |
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130
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0
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return "Wrong content type for $RelsPartName (OPC M1.30 violation)" |
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131
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} |
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132
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133
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# Проверки отдельных связей |
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134
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135
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0
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my( $SourceDir ) = _SourceByRelsPartName( $RelsPartName ); |
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136
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0
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my @RelIDs; |
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137
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0
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for my $RelNode ( $XPC->findnodes( '/opcr:Relationships/opcr:Relationship', |
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138
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$RelsDoc )) { |
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139
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140
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# У связей должен быть уникальный ID |
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141
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142
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0
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my $RelID = $RelNode->getAttribute('Id'); |
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143
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0
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0
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if( grep $RelID eq $_, @RelIDs ) { |
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144
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0
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return "Duplicate Ids in Relationships part $RelsPartName ". |
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145
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"(OPC M1.26 violation)"; |
|
146
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} |
|
147
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148
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0
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0
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my $TargetMode = $RelNode->getAttribute('TargetMode') || 'Internal'; |
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149
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0
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0
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if( $TargetMode eq 'Internal' ) { |
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150
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151
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# Части, связи с которыми описаны, должны существовать |
|
152
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153
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0
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my $RelatedPartName = OPC::FullPartNameFromRelative( |
|
154
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$RelNode->getAttribute('Target'), $SourceDir ); |
|
155
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156
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0
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0
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unless( grep $RelatedPartName eq $_, @ValidPartNames ) { |
|
157
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0
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return "$RelsPartName contains reference on unexisting part $RelatedPartName"; |
|
158
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} |
|
159
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160
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# Не должно быть связей с другими Relationships частями [M1.25] |
|
161
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162
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0
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0
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if( grep $RelatedPartName eq $_, @RelsPartNames ) { |
|
163
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0
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return "Relationship part $RelsPartName contains reference on another ". |
|
164
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"Relationships part $RelatedPartName (OPC M1.25 violation)"; |
|
165
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} |
|
166
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167
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0
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0
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push @PartNames, $RelatedPartName |
|
168
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unless grep $RelatedPartName eq $_, @PartNames; |
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169
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} |
|
170
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} |
|
171
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172
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0
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0
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if( $RelsPartName eq "/_rels/.rels" ) { |
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173
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0
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$PackageRelsDoc = $RelsDoc; |
|
174
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} |
|
175
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} |
|
176
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177
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# Общие для всех частей проверки |
|
178
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179
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0
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for my $PartName ( @PartNames ) { |
|
180
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|
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181
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# У всех частей должен быть задан Content type [M1.2], хотя он может быть |
|
182
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# пустым [M1.14] |
|
183
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|
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184
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0
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0
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|
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|
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unless( defined $Package->PartContentType( $PartName )) { |
|
185
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0
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|
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|
return "Content type is not provided for $PartName (OPC M1.2 violation)"; |
|
186
|
|
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|
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} |
|
187
|
|
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|
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} |
|
188
|
|
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|
189
|
|
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|
# Обязательно должна быть часть, описывающая связи пакета (/_rels/.rels) |
|
190
|
|
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|
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|
191
|
0
|
0
|
|
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|
|
unless( $PackageRelsDoc ) { |
|
192
|
0
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|
|
return "Can't find package relationships item (/_rels/.rels)"; |
|
193
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} |
|
194
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195
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# В пакете может присутствовать максимум одна часть, описывающей мета данные |
|
196
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# (Core Properties) [M4.1] |
|
197
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198
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0
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my @CorePropRelations = $XPC->findnodes( |
|
199
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|
|
'/opcr:Relationships/opcr:Relationship[@Type="'.RELATION_TYPE_CORE_PROPERTIES.'"]', |
|
200
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|
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$PackageRelsDoc ); |
|
201
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|
202
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0
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0
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|
|
if( @CorePropRelations > 1 ) { |
|
203
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0
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|
return "Found more than one part with type 'Core Properties' (OPC M4.1 violation)"; |
|
204
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} |
|
205
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206
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# Если такая часть есть - проверка XML валидности, соответствия схеме и content type |
|
207
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|
208
|
0
|
0
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|
|
if( @CorePropRelations ) { |
|
209
|
0
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|
|
my $CorePropPartName = OPC::FullPartNameFromRelative( |
|
210
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|
|
$CorePropRelations[0]->getAttribute('Target'), '/' ); |
|
211
|
0
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|
|
|
my $CorePropXML = $Package->PartContents( $CorePropPartName ); |
|
212
|
0
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|
|
|
my $CorePropSchema = XML::LibXML::Schema->new( location => |
|
213
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|
|
"$XSD_DIR/opc-coreProperties.xsd" ); |
|
214
|
0
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|
|
eval { |
|
215
|
0
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|
|
|
my $CorePropDoc = XML::LibXML->new()->parse_string( $CorePropXML ); |
|
216
|
0
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|
|
|
|
|
$CorePropSchema->validate( $CorePropDoc ); |
|
217
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|
|
}; |
|
218
|
0
|
0
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|
|
|
|
if( $@ ) { |
|
219
|
0
|
|
|
|
|
|
return $CorePropPartName." is not a valid XML or is not valid against ". |
|
220
|
|
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|
|
|
|
"opc-coreProperties.xsd:\n$@"; |
|
221
|
|
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|
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|
|
} |
|
222
|
|
|
|
|
|
|
|
|
223
|
0
|
0
|
|
|
|
|
unless( $Package->PartContentType( $CorePropPartName ) eq CORE_PROPERTIES_CT ) { |
|
224
|
0
|
|
|
|
|
|
return "Wrong content type for $CorePropPartName" |
|
225
|
|
|
|
|
|
|
} |
|
226
|
|
|
|
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|
|
} |
|
227
|
|
|
|
|
|
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|
|
228
|
|
|
|
|
|
|
# В пакете должна быть как минимум одна часть, описывающая заголовок книги |
|
229
|
|
|
|
|
|
|
|
|
230
|
0
|
|
|
|
|
|
my @DescrRelationNodes = $XPC->findnodes( |
|
231
|
|
|
|
|
|
|
'/opcr:Relationships/opcr:Relationship[@Type="'.RELATION_TYPE_FB3_BOOK.'"]', |
|
232
|
|
|
|
|
|
|
$PackageRelsDoc ); |
|
233
|
|
|
|
|
|
|
|
|
234
|
0
|
0
|
|
|
|
|
unless( @DescrRelationNodes ) { |
|
235
|
0
|
|
|
|
|
|
return "FB3 description not found"; |
|
236
|
|
|
|
|
|
|
} |
|
237
|
|
|
|
|
|
|
|
|
238
|
0
|
|
|
|
|
|
for my $DescrRelationNode ( @DescrRelationNodes ) { |
|
239
|
|
|
|
|
|
|
|
|
240
|
|
|
|
|
|
|
# Каждую часть с описанием проверяем на валидность и соответствие схеме |
|
241
|
|
|
|
|
|
|
|
|
242
|
0
|
|
|
|
|
|
my $DescrPartName = OPC::FullPartNameFromRelative( |
|
243
|
|
|
|
|
|
|
$DescrRelationNode->getAttribute('Target'), '/' ); |
|
244
|
0
|
|
|
|
|
|
my $DescrXML = $Package->PartContents( $DescrPartName ); |
|
245
|
0
|
|
|
|
|
|
my $DescrSchema = XML::LibXML::Schema->new( location => |
|
246
|
|
|
|
|
|
|
"$XSD_DIR/fb3_descr.xsd" ); |
|
247
|
0
|
|
|
|
|
|
my $DescrDoc; |
|
248
|
0
|
|
|
|
|
|
eval { |
|
249
|
0
|
|
|
|
|
|
$DescrDoc = XML::LibXML->new()->parse_string( $DescrXML ); |
|
250
|
0
|
|
|
|
|
|
$DescrSchema->validate( $DescrDoc ); |
|
251
|
|
|
|
|
|
|
}; |
|
252
|
0
|
0
|
|
|
|
|
if( $@ ) { |
|
253
|
0
|
|
|
|
|
|
return $DescrPartName." is not a valid XML or is not valid against ". |
|
254
|
|
|
|
|
|
|
"fb3_descr.xsd:\n$@"; |
|
255
|
|
|
|
|
|
|
} |
|
256
|
|
|
|
|
|
|
|
|
257
|
|
|
|
|
|
|
# Часть с описанием обязательно должна содержать в себе ссылку на тело книги |
|
258
|
|
|
|
|
|
|
|
|
259
|
0
|
|
|
|
|
|
$DescrPartName =~ /^(.*)\/([^\/]*)$/; |
|
260
|
0
|
|
|
|
|
|
my( $DescrDir, $DescrFileName ) = ( $1, $2 ); |
|
261
|
0
|
|
|
|
|
|
my $DescrRelsPartName = "$DescrDir/_rels/$DescrFileName.rels"; |
|
262
|
0
|
|
|
|
|
|
my $DescrRelsXML = $Package->PartContents( $DescrRelsPartName ); |
|
263
|
0
|
0
|
|
|
|
|
unless( $DescrRelsXML ) { |
|
264
|
0
|
|
|
|
|
|
return "Can't find relationships for book description $DescrPartName ". |
|
265
|
|
|
|
|
|
|
"(no $DescrRelsPartName)"; |
|
266
|
|
|
|
|
|
|
} |
|
267
|
0
|
|
|
|
|
|
my $DescrRelsDoc = XML::LibXML->new()->parse_string( $DescrRelsXML ); |
|
268
|
0
|
|
|
|
|
|
my $BodyRelation = $XPC->findvalue( |
|
269
|
|
|
|
|
|
|
'/opcr:Relationships/opcr:Relationship[@Type="'.RELATION_TYPE_FB3_BODY.'"]/@Target', |
|
270
|
|
|
|
|
|
|
$DescrRelsDoc, |
|
271
|
|
|
|
|
|
|
); |
|
272
|
0
|
0
|
|
|
|
|
unless( $BodyRelation ) { |
|
273
|
0
|
|
|
|
|
|
return "Can't find body relationship for $DescrPartName"; |
|
274
|
|
|
|
|
|
|
} |
|
275
|
0
|
|
|
|
|
|
my $BodyPartName = OPC::FullPartNameFromRelative( $BodyRelation, |
|
276
|
|
|
|
|
|
|
$DescrDir ); |
|
277
|
|
|
|
|
|
|
|
|
278
|
|
|
|
|
|
|
# Найденную часть с телом книги также проверяем на валидность и соответствие схеме |
|
279
|
|
|
|
|
|
|
|
|
280
|
0
|
|
|
|
|
|
my $BodyXML = $Package->PartContents( $BodyPartName ); |
|
281
|
0
|
|
|
|
|
|
my $BodySchema = XML::LibXML::Schema->new( location => |
|
282
|
|
|
|
|
|
|
"$XSD_DIR/fb3_body.xsd" ); |
|
283
|
0
|
|
|
|
|
|
my $BodyDoc; |
|
284
|
0
|
|
|
|
|
|
eval { |
|
285
|
0
|
|
|
|
|
|
$BodyDoc = XML::LibXML->load_xml(string=>$BodyXML, huge => 1); |
|
286
|
0
|
|
|
|
|
|
$BodySchema->validate( $BodyDoc ); |
|
287
|
|
|
|
|
|
|
}; |
|
288
|
0
|
0
|
|
|
|
|
if( $@ ) { |
|
289
|
0
|
|
|
|
|
|
return $BodyPartName." is not a valid XML or is not valid against ". |
|
290
|
|
|
|
|
|
|
"fb3_body.xsd:\n$@"; |
|
291
|
|
|
|
|
|
|
} |
|
292
|
|
|
|
|
|
|
} |
|
293
|
|
|
|
|
|
|
|
|
294
|
0
|
|
|
|
|
|
return ''; # успешный выход |
|
295
|
|
|
|
|
|
|
} |
|
296
|
|
|
|
|
|
|
|
|
297
|
|
|
|
|
|
|
sub IsValidPartName { |
|
298
|
0
|
|
|
0
|
0
|
|
my $PartName = shift; |
|
299
|
|
|
|
|
|
|
|
|
300
|
|
|
|
|
|
|
# "A part URI shall not have a forward slash as the last character. [M1.5]" |
|
301
|
0
|
0
|
|
|
|
|
return 0 if $PartName =~ /\/$/; |
|
302
|
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
# Проверяем отдельные сегменты имени |
|
304
|
0
|
|
|
|
|
|
for my $NameSegment ( split '/', $PartName ) { |
|
305
|
|
|
|
|
|
|
|
|
306
|
|
|
|
|
|
|
# "A segment shall not contain percent-encoded forward slash (“/”), or backward |
|
307
|
|
|
|
|
|
|
# slash (“\”) characters. [M1.7]" |
|
308
|
|
|
|
|
|
|
# "A segment shall not contain percent-encoded unreserved characters. [M1.8]" |
|
309
|
0
|
|
|
|
|
|
for my $Char (( '/', '\\', 'a'..'z', 0..9, '-', '.', '_', '~' )) { |
|
310
|
0
|
|
|
|
|
|
my $PercentEncodedChar = sprintf( '%%%x', ord( $Char )); |
|
311
|
0
|
0
|
|
|
|
|
return 0 if $NameSegment =~ /$PercentEncodedChar/i; |
|
312
|
|
|
|
|
|
|
} |
|
313
|
|
|
|
|
|
|
|
|
314
|
|
|
|
|
|
|
# "A segment shall not end with a dot (“.”) character. [M1.9]" |
|
315
|
0
|
0
|
|
|
|
|
return 0 if $NameSegment =~ /\.$/; |
|
316
|
|
|
|
|
|
|
|
|
317
|
|
|
|
|
|
|
# "A segment shall include at least one non-dot character. [M1.10]" |
|
318
|
|
|
|
|
|
|
# (избыточное условие, удовлетворяющееся с помощью M1.9) |
|
319
|
|
|
|
|
|
|
} |
|
320
|
|
|
|
|
|
|
|
|
321
|
0
|
|
|
|
|
|
return 1; |
|
322
|
|
|
|
|
|
|
} |
|
323
|
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
sub _SourceByRelsPartName { |
|
325
|
0
|
|
|
0
|
|
|
my $RelsPartName = shift; |
|
326
|
|
|
|
|
|
|
|
|
327
|
0
|
|
|
|
|
|
my( $SourceDir, $SourceFileName ) = ( $RelsPartName =~ / |
|
328
|
|
|
|
|
|
|
^ ( .* ) # папка файла источника |
|
329
|
|
|
|
|
|
|
_rels\/ |
|
330
|
|
|
|
|
|
|
([^\/]*) # название файла источника без папки |
|
331
|
|
|
|
|
|
|
.rels /x ); |
|
332
|
|
|
|
|
|
|
|
|
333
|
0
|
|
|
|
|
|
return ( $SourceDir, $SourceFileName ); |
|
334
|
|
|
|
|
|
|
} |
|
335
|
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
1; |