Mercurial > prosody-modules

annotate mod_storage_xmlarchive/mod_storage_xmlarchive.lua @ 1690:8c0fbc685364

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mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
author Kim Alvefur <zash@zash.se>
date Sun, 03 May 2015 13:45:42 +0200
parents
children 160c35d2a5a2
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1690
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
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diff changeset
1 local dm = require "core.storagemanager".olddm;
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2 local hmac_sha256 = require"util.hashes".hmac_sha256;
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3 local st = require"util.stanza";
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4 local dt = require"util.datetime";
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5 local new_stream = require "util.xmppstream".new;
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6 local empty = {};
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7
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8 local function fallocate(f, offset, len)
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9 -- This assumes that current position == offset
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10 local fake_data = (" "):rep(len);
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11 local ok, msg = f:write(fake_data);
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12 if not ok then
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13 return ok, msg;
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14 end
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15 f:seek("set", offset);
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16 return true;
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17 end;
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18 pcall(function()
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19 local pposix = require "util.pposix";
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20 fallocate = pposix.fallocate or fallocate;
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21 end);
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22
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23 local archive = {};
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24 local archive_mt = { __index = archive };
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25
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26 function archive:append(username, _, when, with, data)
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27 if getmetatable(data) ~= st.stanza_mt then
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28 return nil, "unsupported-datatype";
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29 end
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30 username = username or "@";
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31 data = tostring(data) .. "\n";
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32 local day = dt.date(when);
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33 local filename = dm.getpath(username.."@"..day, module.host, self.store, "xml", true);
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34 local ok, err;
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35 local f = io.open(filename, "r+");
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36 if not f then
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37 f, err = io.open(filename, "w");
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38 if not f then return nil, err; end
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39 ok, err = dm.list_append(username, module.host, self.store, day);
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40 if not ok then return nil, err; end
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41 end
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42 local offset = f and f:seek("end");
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43 ok, err = fallocate(f, offset, #data);
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44 if not ok then return nil, err; end
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45 f:seek("set", offset);
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46 ok, err = f:write(data);
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47 if not ok then return nil, err; end
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48 ok, err = f:close();
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49 if not ok then return nil, err; end
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50 local id = day .. "-" .. hmac_sha256(username.."@"..day.."+"..offset, data, true):sub(-16);
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51 ok, err = dm.list_append(username.."@"..day, module.host, self.store, { id = id, when = when, with = with, offset = offset, length = #data });
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52 if not ok then return nil, err; end
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53 return id;
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54 end
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55
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56 function archive:find(username, query)
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57 username = username or "@";
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58 query = query or empty;
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59
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60 local result;
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61 local function cb(_, stanza)
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62 if result then
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63 module:log("warn", "Multiple items in chunk");
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64 end
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65 result = stanza;
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66 end
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67
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68 local stream_sess = { notopen = true };
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69 local stream = new_stream(stream_sess, { handlestanza = cb, stream_ns = "jabber:client"});
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70 local dates = dm.list_load(username, module.host, self.store) or empty;
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71 stream:feed(st.stanza("stream", { xmlns = "jabber:client" }):top_tag());
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72 stream_sess.notopen = nil;
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73
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74 local limit = query.limit;
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75 local start_day, step, last_day = 1, 1, #dates;
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76 local count = 0;
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77 local rev = query.reverse;
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78 local in_range = not (query.after or query.before);
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79 if query.after or query.start then
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80 local d = query.after and query.after:sub(1, 10) or dt.date(query.start);
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81 for i = 1, #dates do
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82 if dates[i] == d then
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83 start_day = i; break;
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84 end
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85 end
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86 end
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87 if query.before or query["end"] then
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88 local d = query.before and query.before:sub(1, 10) or dt.date(query["end"]);
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89 for i = #dates, 1, -1 do
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90 if dates[i] == d then
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91 last_day = i; break;
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92 end
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93 end
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94 end
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95 if rev then
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96 start_day, step, last_day = last_day, -step, start_day;
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97 end
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98 local items, xmlfile;
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99 local first_item, last_item;
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100
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101 return function ()
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102 if limit and count >= limit then xmlfile:close() return; end
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103
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104 for d = start_day, last_day, step do
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105 if d ~= start_day or not items then
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106 module:log("debug", "Load items for %s", dates[d]);
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107 start_day = d;
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108 items = dm.list_load(username .. "@" .. dates[d], module.host, self.store) or empty;
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109 if not rev then
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110 first_item, last_item = 1, #items;
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111 else
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112 first_item, last_item = #items, 1;
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113 end
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114 local ferr;
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115 xmlfile, ferr = io.open(dm.getpath(username .. "@" .. dates[d], module.host, self.store, "xml"));
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116 if not xmlfile then
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117 module:log("error", "Error: %s", ferr);
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118 return;
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119 end
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120 end
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121
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122 for i = first_item, last_item, step do
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123 module:log("debug", "data[%q][%d]", dates[d], i);
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124 local item = items[i];
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125 if not item then
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126 module:log("debug", "data[%q][%d] is nil", dates[d], i);
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127 break;
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128 end
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129 if xmlfile and in_range
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130 and (not query.with or item.with == query.with)
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131 and (not query.start or item.when >= query.start)
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132 and (not query["end"] or item.when <= query["end"]) then
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133 count = count + 1;
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134 first_item = i + step;
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135
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136 xmlfile:seek("set", item.offset);
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137 local data = xmlfile:read(item.length);
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138 local ok, err = stream:feed(data);
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139 if not ok then
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140 module:log("warn", "Parse error: %s", err);
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141 end
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142 if result then
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143 local stanza = result;
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144 result = nil;
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145 return item.id, stanza, item.when, item.with;
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146 end
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Kim Alvefur <zash@zash.se>
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147 end
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Kim Alvefur <zash@zash.se>
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148 if (rev and item.id == query.after) or
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149 (not rev and item.id == query.before) then
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150 in_range = false;
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Kim Alvefur <zash@zash.se>
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151 limit = count;
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152 end
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153 if (rev and item.id == query.before) or
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diff changeset
154 (not rev and item.id == query.after) then
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Kim Alvefur <zash@zash.se>
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155 in_range = true;
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Kim Alvefur <zash@zash.se>
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156 end
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Kim Alvefur <zash@zash.se>
parents:
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157 end
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Kim Alvefur <zash@zash.se>
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158 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
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159 if xmlfile then
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Kim Alvefur <zash@zash.se>
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diff changeset
160 xmlfile:close();
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Kim Alvefur <zash@zash.se>
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161 xmlfile = nil;
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Kim Alvefur <zash@zash.se>
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162 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
163 end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
164 end
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Kim Alvefur <zash@zash.se>
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diff changeset
165
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166 function archive:delete(username, query)
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Kim Alvefur <zash@zash.se>
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diff changeset
167 username = username or "@";
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Kim Alvefur <zash@zash.se>
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diff changeset
168 query = query or empty;
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diff changeset
169 if query.with or query.start or query.after then
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170 return nil, "not-implemented"; -- Only trimming the oldest messages
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Kim Alvefur <zash@zash.se>
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171 end
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diff changeset
172 local before = query.before or query["end"] or "9999-12-31";
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Kim Alvefur <zash@zash.se>
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173 if type(before) == "number" then before = dt.date(before); else before = before:sub(1, 10); end
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Kim Alvefur <zash@zash.se>
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diff changeset
174 local dates = dm.list_load(username, module.host, self.store) or empty;
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Kim Alvefur <zash@zash.se>
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diff changeset
175 local remaining_dates = {};
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
176 for d = 1, #dates do
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
177 if dates[d] >= before then
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Kim Alvefur <zash@zash.se>
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diff changeset
178 table.insert(remaining_dates, dates[d]);
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parents:
diff changeset
179 end
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Kim Alvefur <zash@zash.se>
parents:
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180 end
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Kim Alvefur <zash@zash.se>
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diff changeset
181 table.sort(remaining_dates);
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parents:
diff changeset
182 local ok, err = dm.list_store(username, module.host, self.store, remaining_dates);
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
183 if not ok then return ok, err; end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
184 for d = 1, #dates do
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
185 if dates[d] < before then
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
186 os.remove(dm.getpath(username .. "@" .. dates[d], module.host, self.store, "list"));
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
187 os.remove(dm.getpath(username .. "@" .. dates[d], module.host, self.store, "xml"));
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
188 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
189 end
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
190 return true;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
191 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
192
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
193 local provider = {};
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
194 function provider:open(store, typ)
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Kim Alvefur <zash@zash.se>
parents:
diff changeset
195 if typ ~= "archive" then return nil, "unsupported-store"; end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
196 return setmetatable({ store = store }, archive_mt);
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
197 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
198
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
199 module:provides("storage", provider);