prosody
081e920dc74e
util/datamanager.lua

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util/datamanager.lua @ 89:081e920dc74e

Fixed: incorrect auth check
author Waqas Hussain <waqas20@gmail.com>
date Thu, 09 Oct 2008 03:40:16 +0500
parent 88:023320150c65
child 117:8e5c5e6a3240
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1 local format = string.format;
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2 local setmetatable, type = setmetatable, type;
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3 local pairs = pairs;
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4 local char = string.char;
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5 local loadfile, setfenv, pcall = loadfile, setfenv, pcall;
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6 local log = log;
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7 local io_open = io.open;
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8 local tostring = tostring;
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9
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10 module "datamanager"
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11
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12
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13 ---- utils -----
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14 local encode, decode;
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15
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16 local log = function (type, msg) return log(type, "datamanager", msg); end
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17
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18 do
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19 local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end });
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20
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21 decode = function (s)
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22 return s and (s:gsub("+", " "):gsub("%%([a-fA-F0-9][a-fA-F0-9])", urlcodes));
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23 end
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24
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25 encode = function (s)
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26 return s and (s:gsub("%W", function (c) return format("%%%x", c:byte()); end));
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27 end
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28 end
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29
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30 local function basicSerialize (o)
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31 if type(o) == "number" or type(o) == "boolean" then
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32 return tostring(o)
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33 else -- assume it is a string
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34 return format("%q", tostring(o))
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35 end
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36 end
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37
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38
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39 local function simplesave (f, o)
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40 if type(o) == "number" then
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41 f:write(o)
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42 elseif type(o) == "string" then
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43 f:write(format("%q", o))
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44 elseif type(o) == "table" then
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45 f:write("{\n")
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46 for k,v in pairs(o) do
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47 f:write(" [", basicSerialize(k), "] = ")
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48 simplesave(f, v)
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49 f:write(",\n")
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50 end
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51 f:write("}\n")
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52 else
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53 error("cannot serialize a " .. type(o))
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54 end
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55 end
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56
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57 ------- API -------------
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58
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59 function getpath(username, host, datastore)
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60 if username then
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61 return format("data/%s/%s/%s.dat", encode(host), datastore, encode(username));
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62 elseif host then
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63 return format("data/%s/%s.dat", encode(host), datastore);
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64 else
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65 return format("data/%s.dat", datastore);
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66 end
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67 end
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68
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69 function load(username, host, datastore)
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70 local data, ret = loadfile(getpath(username, host, datastore));
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71 if not data then log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..username.."@"..host); return nil; end
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72 setfenv(data, {});
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73 local success, ret = pcall(data);
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74 if not success then log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..username.."@"..host); return nil; end
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75 return ret;
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76 end
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77
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78 function store(username, host, datastore, data)
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79 local f, msg = io_open(getpath(username, host, datastore), "w+");
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80 if not f then log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..username.."@"..host); return nil; end
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81 f:write("return ");
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82 simplesave(f, data);
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83 f:close();
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84 return true;
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85 end
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86