1 | ###########################################################################
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2 | #
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3 | # dbutil::gdbm -- utility functions for writing to gdbm databases
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4 | #
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5 | # A component of the Greenstone digital library software
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6 | # from the New Zealand Digital Library Project at the
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7 | # University of Waikato, New Zealand.
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8 | #
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9 | # Copyright (C) 2009
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10 | #
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11 | # This program is free software; you can redistribute it and/or modify
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12 | # it under the terms of the GNU General Public License as published by
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13 | # the Free Software Foundation; either version 2 of the License, or
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14 | # (at your option) any later version.
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15 | #
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16 | # This program is distributed in the hope that it will be useful,
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17 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | # GNU General Public License for more details.
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20 | #
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21 | # You should have received a copy of the GNU General Public License
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22 | # along with this program; if not, write to the Free Software
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23 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 | #
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25 | ###########################################################################
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26 |
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27 | package dbutil::gdbm;
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28 |
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29 | use strict;
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30 |
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31 | use util;
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32 | use FileUtils;
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33 | use dbutil::gdbmtxtgz;
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34 |
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35 | # -----------------------------------------------------------------------------
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36 | # GDBM IMPLEMENTATION
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37 | # -----------------------------------------------------------------------------
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38 |
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39 | sub open_infodb_write_handle
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40 | {
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41 | my $infodb_file_path = shift(@_);
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42 | my $opt_append = shift(@_);
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43 |
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44 | my $txt2db_exe = &FileUtils::filenameConcatenate($ENV{'GSDLHOME'},"bin",$ENV{'GSDLOS'}, "txt2db" . &util::get_os_exe());
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45 | my $infodb_file_handle = undef;
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46 | my $cmd = "\"$txt2db_exe\"";
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47 | if ((defined $opt_append) && ($opt_append eq "append")) {
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48 | $cmd .= " -append";
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49 | }
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50 | $cmd .= " \"$infodb_file_path\"";
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51 |
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52 | if (!-e "$txt2db_exe")
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53 | {
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54 | print STDERR "Error: Unable to find $txt2db_exe\n";
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55 | return undef;
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56 | }
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57 |
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58 | if(!open($infodb_file_handle, "| $cmd"))
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59 | {
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60 |
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61 | print STDERR "Error: Failed to open pipe to $cmd\n";
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62 | print STDERR " $!\n";
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63 | return undef;
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64 | }
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65 |
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66 | binmode($infodb_file_handle,":utf8");
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67 |
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68 | return $infodb_file_handle;
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69 | }
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70 |
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71 |
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72 |
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73 | sub close_infodb_write_handle
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74 | {
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75 | my $infodb_handle = shift(@_);
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76 |
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77 | close($infodb_handle);
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78 | }
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79 |
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80 |
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81 | sub get_infodb_file_path
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82 | {
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83 | my $collection_name = shift(@_);
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84 | my $infodb_directory_path = shift(@_);
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85 |
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86 | my $infodb_file_extension = ".gdb";
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87 | my $infodb_file_name = &util::get_dirsep_tail($collection_name) . $infodb_file_extension;
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88 | return &FileUtils::filenameConcatenate($infodb_directory_path, $infodb_file_name);
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89 | }
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90 |
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91 |
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92 | sub read_infodb_file
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93 | {
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94 | my $infodb_file_path = shift(@_);
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95 | my $infodb_map = shift(@_);
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96 |
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97 | open (PIPEIN, "db2txt \"$infodb_file_path\" |")
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98 | || die "couldn't open pipe from db2txt \$infodb_file_path\"\n";
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99 |
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100 | binmode(PIPEIN,":utf8");
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101 |
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102 | my $infodb_line = "";
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103 | my $infodb_key = "";
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104 | my $infodb_value = "";
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105 | while (defined ($infodb_line = <PIPEIN>))
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106 | {
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107 | $infodb_line =~ s/(\r\n)+$//; # more general than chomp
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108 |
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109 | if ($infodb_line =~ /^\[([^\]]+)\]$/)
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110 | {
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111 | $infodb_key = $1;
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112 | }
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113 | elsif ($infodb_line =~ /^-{70}$/)
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114 | {
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115 | $infodb_map->{$infodb_key} = $infodb_value;
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116 | $infodb_key = "";
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117 | $infodb_value = "";
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118 | }
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119 | else
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120 | {
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121 | $infodb_value .= $infodb_line;
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122 | }
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123 | }
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124 |
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125 | close (PIPEIN);
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126 | }
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127 |
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128 | sub read_infodb_keys
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129 | {
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130 | my $infodb_file_path = shift(@_);
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131 | my $infodb_map = shift(@_);
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132 |
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133 | open (PIPEIN, "gdbmkeys \"$infodb_file_path\" |")
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134 | || die "couldn't open pipe from gdbmkeys \$infodb_file_path\"\n";
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135 |
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136 | binmode(PIPEIN,":utf8");
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137 |
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138 | my $infodb_line = "";
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139 | my $infodb_key = "";
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140 | my $infodb_value = "";
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141 | while (defined ($infodb_line = <PIPEIN>))
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142 | {
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143 | # chomp $infodb_line; # remove end of line
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144 | $infodb_line =~ s/(\r\n)+$//; # more general than chomp
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145 |
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146 | $infodb_map->{$infodb_line} = 1;
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147 | }
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148 |
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149 | close (PIPEIN);
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150 | }
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151 |
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152 | sub write_infodb_entry
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153 | {
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154 | # With infodb_handle already set up, works the same as _gdbm_txtgz version
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155 | &dbutil::gdbmtxtgz::write_infodb_entry(@_);
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156 | }
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157 |
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158 | sub write_infodb_rawentry
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159 | {
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160 | # With infodb_handle already set up, works the same as _gdbm_txtgz version
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161 | &dbutil::gdbmtxtgz::write_infodb_rawentry(@_);
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162 | }
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163 |
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164 |
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165 | sub set_infodb_entry_OLD
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166 | {
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167 | my $infodb_file_path = shift(@_);
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168 | my $infodb_key = shift(@_);
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169 | my $infodb_map = shift(@_);
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170 |
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171 | # Protect metadata values that go inside quotes for gdbmset
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172 | foreach my $k (keys %$infodb_map) {
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173 | my @escaped_v = ();
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174 | foreach my $v (@{$infodb_map->{$k}}) {
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175 | if ($k eq "contains") {
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176 | # protect quotes in ".2;".3 etc
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177 | $v =~ s/\"/\\\"/g;
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178 | push(@escaped_v, $v);
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179 | }
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180 | else {
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181 | my $ev = &ghtml::unescape_html($v);
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182 | $ev =~ s/\"/\\\"/g;
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183 | push(@escaped_v, $ev);
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184 | }
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185 | }
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186 | $infodb_map->{$k} = \@escaped_v;
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187 | }
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188 |
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189 | # Generate the record string
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190 | my $serialized_infodb_map = &dbutil::convert_infodb_hash_to_string($infodb_map);
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191 | ## print STDERR "**** ser dr\n$serialized_infodb_map\n\n\n";
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192 |
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193 | # Store it into GDBM
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194 | my $cmd = "gdbmset \"$infodb_file_path\" \"$infodb_key\" \"$serialized_infodb_map\"";
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195 | my $status = system($cmd);
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196 |
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197 | return $status;
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198 |
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199 | }
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200 |
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201 |
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202 |
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203 | sub set_infodb_entry
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204 | {
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205 | my $infodb_file_path = shift(@_);
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206 | my $infodb_key = shift(@_);
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207 | my $infodb_map = shift(@_);
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208 |
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209 | # HTML escape anything that is not part of the "contains" metadata value
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210 | foreach my $k (keys %$infodb_map) {
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211 | my @escaped_v = ();
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212 | foreach my $v (@{$infodb_map->{$k}}) {
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213 | if ($k eq "contains") {
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214 | push(@escaped_v, $v);
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215 | }
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216 | else {
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217 | my $ev = &ghtml::unescape_html($v);
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218 | push(@escaped_v, $ev);
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219 | }
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220 | }
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221 | $infodb_map->{$k} = \@escaped_v;
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222 | }
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223 |
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224 | # Generate the record string
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225 | my $serialized_infodb_map = &dbutil::convert_infodb_hash_to_string($infodb_map);
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226 | ### print STDERR "**** ser dr\n$serialized_infodb_map\n\n\n";
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227 |
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228 | # Store it into GDBM using 'txt2db -append' which despite its name
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229 | # actually replaces the record if it already exists
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230 |
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231 | my $cmd = "txt2db -append \"$infodb_file_path\"";
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232 |
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233 | my $status = undef;
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234 | if(!open(GOUT, "| $cmd"))
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235 | {
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236 | print STDERR "Error: gdbm::set_infodb_entry() failed to open pipe to: $cmd\n";
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237 | print STDERR " $!\n";
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238 | $status = -1;
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239 | }
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240 | else {
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241 | binmode(GOUT,":utf8");
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242 |
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243 | print GOUT "[$infodb_key]\n";
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244 | print GOUT "$serialized_infodb_map\n";
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245 |
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246 | close(GOUT);
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247 | $status = 0; # as in exit status of cmd OK
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248 | }
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249 |
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250 | return $status;
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251 | }
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252 |
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253 |
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254 | sub delete_infodb_entry
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255 | {
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256 | # With infodb_handle already set up, works the same as _gdbm_txtgz version
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257 | &dbutil::gdbmtxtgz::delete_infodb_entry(@_);
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258 | }
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259 |
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260 |
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261 |
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262 | 1;
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