Wed, 03 Dec 2008 13:06:23 +0000
Fix port number in mod_console instructions
0 | 1 | local format = string.format; |
2 | local setmetatable, type = setmetatable, type; | |
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3 | local pairs, ipairs = pairs, ipairs; |
0 | 4 | local char = string.char; |
5 | local loadfile, setfenv, pcall = loadfile, setfenv, pcall; | |
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6 | local log = require "util.logger".init("datamanager"); |
0 | 7 | local io_open = io.open; |
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8 | local os_remove = os.remove; |
267 | 9 | local tostring, tonumber = tostring, tonumber; |
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10 | local error = error; |
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11 | local next = next; |
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12 | local t_insert = table.insert; |
0 | 13 | |
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14 | local indent = function(f, i) |
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15 | for n = 1, i do |
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16 | f:write("\t"); |
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17 | end |
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18 | end |
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19 | |
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20 | local data_path = "data"; |
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21 | |
0 | 22 | module "datamanager" |
23 | ||
24 | ||
25 | ---- utils ----- | |
26 | local encode, decode; | |
27 | ||
28 | do | |
29 | local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end }); | |
30 | ||
31 | decode = function (s) | |
32 | return s and (s:gsub("+", " "):gsub("%%([a-fA-F0-9][a-fA-F0-9])", urlcodes)); | |
33 | end | |
34 | ||
35 | encode = function (s) | |
36 | return s and (s:gsub("%W", function (c) return format("%%%x", c:byte()); end)); | |
37 | end | |
38 | end | |
39 | ||
40 | local function basicSerialize (o) | |
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41 | if type(o) == "number" or type(o) == "boolean" then |
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42 | return tostring(o); |
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43 | else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise. |
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44 | return (format("%q", tostring(o)):gsub("\\\n", "\\n")); |
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45 | end |
0 | 46 | end |
47 | ||
48 | ||
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49 | local function simplesave (f, o, ind) |
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50 | if type(o) == "number" then |
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51 | f:write(o) |
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52 | elseif type(o) == "string" then |
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53 | f:write((format("%q", o):gsub("\\\n", "\\n"))) |
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54 | elseif type(o) == "table" then |
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55 | f:write("{\n") |
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56 | for k,v in pairs(o) do |
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57 | indent(f, ind); |
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58 | f:write("[", basicSerialize(k), "] = ") |
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59 | simplesave(f, v, ind+1) |
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60 | f:write(",\n") |
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61 | end |
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62 | indent(f, ind-1); |
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63 | f:write("}") |
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64 | elseif type(o) == "boolean" then |
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65 | f:write(o and "true" or "false"); |
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66 | else |
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67 | error("cannot serialize a " .. type(o)) |
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68 | end |
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69 | end |
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70 | |
0 | 71 | ------- API ------------- |
72 | ||
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73 | function set_data_path(path) |
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74 | data_path = path; |
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75 | end |
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76 | |
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77 | function getpath(username, host, datastore, ext) |
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78 | ext = ext or "dat"; |
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79 | if username then |
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80 | return format("%s/%s/%s/%s.%s", data_path, encode(host), datastore, encode(username), ext); |
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81 | elseif host then |
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82 | return format("%s/%s/%s.%s", data_path, encode(host), datastore, ext); |
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83 | else |
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84 | return format("%s/%s.%s", data_path, datastore, ext); |
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85 | end |
0 | 86 | end |
87 | ||
88 | function load(username, host, datastore) | |
89 | local data, ret = loadfile(getpath(username, host, datastore)); | |
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90 | if not data then |
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91 | log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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92 | return nil; |
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93 | end |
0 | 94 | setfenv(data, {}); |
95 | local success, ret = pcall(data); | |
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96 | if not success then |
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97 | log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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98 | return nil; |
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99 | end |
0 | 100 | return ret; |
101 | end | |
102 | ||
103 | function store(username, host, datastore, data) | |
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104 | if not data then |
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105 | data = {}; |
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106 | end |
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107 | -- save the datastore |
0 | 108 | local f, msg = io_open(getpath(username, host, datastore), "w+"); |
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109 | if not f then |
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110 | log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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111 | return; |
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112 | end |
0 | 113 | f:write("return "); |
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114 | simplesave(f, data, 1); |
0 | 115 | f:close(); |
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116 | if not next(data) then -- try to delete empty datastore |
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117 | os_remove(getpath(username, host, datastore)); |
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118 | end |
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119 | -- we write data even when we are deleting because lua doesn't have a |
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120 | -- platform independent way of checking for non-exisitng files |
0 | 121 | return true; |
122 | end | |
123 | ||
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124 | function list_append(username, host, datastore, data) |
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125 | if not data then return; end |
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126 | -- save the datastore |
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127 | local f, msg = io_open(getpath(username, host, datastore, "list"), "a+"); |
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128 | if not f then |
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129 | log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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130 | return; |
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131 | end |
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132 | f:write("item("); |
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133 | simplesave(f, data, 1); |
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134 | f:write(");\n"); |
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135 | f:close(); |
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136 | return true; |
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137 | end |
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138 | |
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139 | function list_store(username, host, datastore, data) |
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140 | if not data then |
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141 | data = {}; |
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142 | end |
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143 | -- save the datastore |
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144 | local f, msg = io_open(getpath(username, host, datastore, "list"), "w+"); |
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145 | if not f then |
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146 | log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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147 | return; |
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148 | end |
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149 | for _, d in ipairs(data) do |
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150 | f:write("item("); |
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151 | simplesave(f, d, 1); |
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152 | f:write(");\n"); |
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153 | end |
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154 | f:close(); |
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155 | if not next(data) then -- try to delete empty datastore |
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156 | os_remove(getpath(username, host, datastore, "list")); |
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157 | end |
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158 | -- we write data even when we are deleting because lua doesn't have a |
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159 | -- platform independent way of checking for non-exisitng files |
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160 | return true; |
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161 | end |
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162 | |
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163 | function list_load(username, host, datastore) |
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164 | local data, ret = loadfile(getpath(username, host, datastore, "list")); |
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165 | if not data then |
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166 | log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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167 | return nil; |
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168 | end |
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169 | local items = {}; |
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170 | setfenv(data, {item = function(i) t_insert(items, i); end}); |
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171 | local success, ret = pcall(data); |
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172 | if not success then |
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173 | log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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174 | return nil; |
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175 | end |
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176 | return items; |
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177 | end |
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178 | |
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179 | return _M; |