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annotate src/luan/modules/lucene/Lucene.luan @ 1134:e54ae41e9501

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cleaner security
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 17 Jan 2018 21:44:46 -0700
parents ba4daf107e07
children 48f302bdc187
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rev   line source
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1 java()
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2 local Luan = require "luan:Luan.luan"
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3 local error = Luan.error
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4 local ipairs = Luan.ipairs or error()
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5 local type = Luan.type or error()
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6 local set_metatable = Luan.set_metatable or error()
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7 local Html = require "luan:Html.luan"
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8 local Io = require "luan:Io.luan"
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9 Io.unrestricted()
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10 local uri = Io.uri or error()
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11 local String = require "luan:String.luan"
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12 local matches = String.matches or error()
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13 local Rpc = require "luan:Rpc.luan"
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14 local LuceneIndex = require "java:luan.modules.lucene.LuceneIndex"
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15 local NumberFieldParser = require "java:luan.modules.lucene.queryparser.NumberFieldParser"
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16 local StringFieldParser = require "java:luan.modules.lucene.queryparser.StringFieldParser"
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17 local SaneQueryParser = require "java:luan.modules.lucene.queryparser.SaneQueryParser"
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18 local Version = require "java:org.apache.lucene.util.Version"
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19 local EnglishAnalyzer = require "java:org.apache.lucene.analysis.en.EnglishAnalyzer"
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20
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21
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22 local Lucene = {}
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23
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24 Lucene.instances = {}
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25
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26 Lucene.type = {
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27 string = LuceneIndex.STRING_FIELD_PARSER;
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28 integer = NumberFieldParser.INT;
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29 long = NumberFieldParser.LONG;
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30 double = NumberFieldParser.DOUBLE;
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32 english = StringFieldParser.new(EnglishAnalyzer.new(Version.LUCENE_CURRENT))
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33 }
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34
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35 Lucene.literal = SaneQueryParser.literal
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36
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37 function Lucene.index(index_dir,default_type,default_fields)
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38 local index = {}
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39 index.dir = index_dir
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40 local java_index = LuceneIndex.new(index_dir,default_type,default_fields)
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41 index.java = java_index
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42 -- index.indexed_fields = java_index.indexedFieldsMeta.newTable()
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43
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44 index.indexed_fields = {}
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45 local mt = {}
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46 set_metatable(index.indexed_fields,mt)
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47 function mt.__index(_,key)
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48 return java_index.getIndexedFieldParser(key)
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49 end
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50 function mt.__new_index(_,key,value)
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51 return java_index.setIndexedFieldParser(key,value)
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52 end
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53
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54 -- index.indexed_only_fields[type][field] = fn(doc)
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55 index.indexed_only_fields = java_index.indexed_only_fields
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56
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57 index.to_string = java_index.to_string
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58 -- index.backup = java_index.backup
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59 index.snapshot = java_index.snapshot
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60 index.advanced_search = java_index.advanced_search
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61 index.search_in_transaction = java_index.search_in_transaction
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62 index.delete_all = java_index.delete_all
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63 index.delete = java_index.delete
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64 index.save = java_index.save
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65 index.update_in_transaction = java_index.update_in_transaction
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66 -- index.close = java_index.close
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67 index.ensure_open = java_index.ensure_open
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68 index.next_id = java_index.nextId
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69 index.highlighter = java_index.highlighter
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70
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71 Lucene.instances[index] = true
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72
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73 function index.close()
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74 Lucene.instances[index] = nil
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75 java_index.close()
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76 end
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77
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78 function index.search(query, from, to, sort)
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79 from or error "missing 'from' parameter"
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80 to or error "missing 'to' parameter"
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81 local results = {}
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82 local function fn(i,doc_fn)
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83 if i >= from then
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84 results[#results+1] = doc_fn()
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85 end
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86 end
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87 local total_hits = index.advanced_search(query,fn,to,sort)
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88 return results, total_hits
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89 end
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91 function index.get_document(query)
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92 local doc
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93 local function fn(_,doc_fn)
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94 doc = doc_fn()
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95 end
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96 local total_hits = index.advanced_search(query,fn,1)
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97 total_hits <= 1 or error( "found " .. total_hits .. " documents" )
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98 return doc
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99 end
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101 function index.count(query)
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102 return index.advanced_search(query)
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103 end
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104
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105 function index.html_highlighter(query,formatter,container_tags)
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106 local highlighter = index.highlighter(query,formatter)
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107 return function(html)
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108 local list = Html.parse(html,container_tags)
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109 local result = {}
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110 for _, obj in ipairs(list) do
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111 if type(obj) == "string" then
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112 obj = highlighter(obj)
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113 end
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114 result[#result+1] = obj
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115 end
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116 return Html.to_string(result)
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117 end
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118 end
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119
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120 function index.zip(zip_file)
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121 index.snapshot( function(dir_path,file_names)
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122 zip_file.delete()
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123 local zip_path = zip_file.canonical().to_string()
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124 local dir = uri("file:"..dir_path)
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125 local dir_name = dir.name()
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126 local options = {dir=dir.parent()}
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127 for _, file_name in ipairs(file_names) do
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128 local cmd = "zip "..zip_path.." "..dir_name.."/"..file_name
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129 Io.uri("os:"..cmd,options).read_text()
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130 end
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131 end )
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132 end
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133
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134 function index.restore(zip_file)
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135 java_index.run_in_lock( function()
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136 local lucene_dir = uri("file:"..index.dir)
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137 local before_restore = lucene_dir.parent().child("before_restore.zip")
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138 index.zip(before_restore)
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139 java_index.close()
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140 lucene_dir.delete()
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141 Io.uri("os:unzip "..zip_file.canonical().to_string(),{dir=lucene_dir.parent()}).read_text()
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142 java_index.reopen()
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143 end )
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144 end
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145
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146 local function multi_error()
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147 error "multiple lucene instances"
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148 end
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149
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150 if Rpc.functions.lucene_backup == nil then
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151
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152 function Rpc.functions.lucene_backup(password)
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153 Io.password == password or error "wrong password"
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154 local zip_file = uri("file:"..index.dir).parent().child("backup.zip")
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155 index.zip(zip_file)
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156 return zip_file
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157 end
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158
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159 function Rpc.functions.lucene_restore(password,zip_file)
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160 Io.password == password or error "wrong password"
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161 local backup_zip = uri("file:"..index.dir).parent().child("backup.zip")
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162 backup_zip.write(zip_file)
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163 index.restore(backup_zip)
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164 end
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165
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166 else
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167 Rpc.functions.lucene_backup = multi_error
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168 Rpc.functions.lucene_restore = multi_error
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169 end
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170
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171 return index
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172 end
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173
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174 return Lucene