Mercurial > prosody-modules

annotate mod_storage_xmlarchive/mod_storage_xmlarchive.lua @ 1740:11f7fb2f927f

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mod_storage_xmlarchive: Code is annoying to read when every other line is 'if not ok then return'
author Kim Alvefur <zash@zash.se>
date Mon, 18 May 2015 02:44:41 +0200
parents 940a4ab75cec
children 07ceaf5f6f0d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 return f:seek("set", offset);
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16 end;
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17
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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 module:log("error", "Attempt to store non-stanza object, traceback: %s", debug.traceback());
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29 return nil, "unsupported-datatype";
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30 end
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31
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32 username = username or "@";
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33 data = tostring(data) .. "\n";
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34
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35 local day = dt.date(when);
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36 local filename = dm.getpath(username.."@"..day, module.host, self.store, "xml", true);
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37
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38 local ok, err;
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39 local f = io.open(filename, "r+");
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40 if not f then
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41 f, err = io.open(filename, "w"); if not f then return nil, err; end
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42 ok, err = dm.list_append(username, module.host, self.store, day);
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43 if not ok then return nil, err; end
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44 end
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45
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46 local offset = f:seek("end"); -- Seek to the end and collect current file length
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47 -- then make sure there is enough free space for what we're about to add
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48 ok, err = fallocate(f, offset, #data); if not ok then return nil, err; end
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49 ok, err = f:write(data); if not ok then return nil, err; end
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50 ok, err = f:close(); if not ok then return nil, err; end
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51
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52 local id = day .. "-" .. hmac_sha256(username.."@"..day.."+"..offset, data, true):sub(-16);
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53 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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54 if not ok then return nil, err; end
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55 return id;
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56 end
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57
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58 function archive:find(username, query)
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59 username = username or "@";
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60 query = query or empty;
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61
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62 local result;
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63 local function cb(_, stanza)
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64 if result then
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65 module:log("warn", "Multiple items in chunk");
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66 end
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67 result = stanza;
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68 end
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69
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70 local stream_sess = { notopen = true };
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71 local stream = new_stream(stream_sess, { handlestanza = cb, stream_ns = "jabber:client"});
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72 local dates = dm.list_load(username, module.host, self.store) or empty;
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73 stream:feed(st.stanza("stream", { xmlns = "jabber:client" }):top_tag());
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74 local function reset_stream()
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75 stream:reset();
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76 stream_sess.notopen = true;
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77 stream:feed(st.stanza("stream", { xmlns = "jabber:client" }):top_tag());
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78 stream_sess.notopen = nil;
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79 end
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80 reset_stream();
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81
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82 local limit = query.limit;
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83 local start_day, step, last_day = 1, 1, #dates;
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84 local count = 0;
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85 local rev = query.reverse;
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86 local in_range = not (query.after or query.before);
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87 if query.after or query.start then
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88 local d = query.after and query.after:sub(1, 10) or dt.date(query.start);
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89 for i = 1, #dates do
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90 if dates[i] == d then
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91 start_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 query.before or query["end"] then
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96 local d = query.before and query.before:sub(1, 10) or dt.date(query["end"]);
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97 for i = #dates, 1, -1 do
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98 if dates[i] == d then
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99 last_day = i; break;
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100 end
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101 end
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102 end
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103 if rev then
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104 start_day, step, last_day = last_day, -step, start_day;
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105 end
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106 local items, xmlfile;
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107 local first_item, last_item;
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108
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109 return function ()
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110 if limit and count >= limit then xmlfile:close() return; end
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111 local filename;
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112
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113 for d = start_day, last_day, step do
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114 if d ~= start_day or not items then
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115 module:log("debug", "Loading items from %s", dates[d]);
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116 start_day = d;
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117 items = dm.list_load(username .. "@" .. dates[d], module.host, self.store) or empty;
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118 if not rev then
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119 first_item, last_item = 1, #items;
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120 else
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
121 first_item, last_item = #items, 1;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
122 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
123 local ferr;
1726
160c35d2a5a2 mod_storage_xmlarchive: Improve logging of parse errors
Kim Alvefur <zash@zash.se>
parents: 1690
diff changeset
124 filename = dm.getpath(username .. "@" .. dates[d], module.host, self.store, "xml");
160c35d2a5a2 mod_storage_xmlarchive: Improve logging of parse errors
Kim Alvefur <zash@zash.se>
parents: 1690
diff changeset
125 xmlfile, ferr = io.open(filename);
1690
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
126 if not xmlfile then
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
127 module:log("error", "Error: %s", ferr);
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
128 return;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
129 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
130 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
131
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
132 for i = first_item, last_item, step do
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
133 local item = items[i];
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
134 if not item then
1730
e02af2b32f30 mod_storage_xmlarchive: Increase severity of log message regarding unexpected missing items
Kim Alvefur <zash@zash.se>
parents: 1729
diff changeset
135 module:log("warn", "data[%q][%d] is nil", dates[d], i);
1690
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
136 break;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
137 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
138 if xmlfile and in_range
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
139 and (not query.with or item.with == query.with)
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
140 and (not query.start or item.when >= query.start)
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
141 and (not query["end"] or item.when <= query["end"]) then
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
142 count = count + 1;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
143 first_item = i + step;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
144
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
145 xmlfile:seek("set", item.offset);
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
146 local data = xmlfile:read(item.length);
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
147 local ok, err = stream:feed(data);
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
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148 if not ok then
1726
160c35d2a5a2 mod_storage_xmlarchive: Improve logging of parse errors
Kim Alvefur <zash@zash.se>
parents: 1690
diff changeset
149 module:log("warn", "Parse error in %s at %d+%d: %s", filename, item.offset, item.length, err);
1727
8f12afb633ec mod_storage_xmlarchive: Attempt to recover after parse failures
Kim Alvefur <zash@zash.se>
parents: 1726
diff changeset
150 reset_stream();
1690
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
151 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
152 if result then
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
153 local stanza = result;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
154 result = nil;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
155 return item.id, stanza, item.when, item.with;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
156 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
157 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
158 if (rev and item.id == query.after) or
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
159 (not rev and item.id == query.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
160 in_range = false;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
161 limit = count;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
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 if (rev and item.id == query.before) or
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
164 (not rev and item.id == query.after) then
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
165 in_range = true;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
166 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
167 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
168 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
169 if xmlfile then
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
170 xmlfile:close();
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
171 xmlfile = nil;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
172 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
173 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
174 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
175
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
176 function archive:delete(username, query)
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
177 username = username or "@";
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
178 query = query or empty;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
179 if query.with or query.start or query.after then
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
180 return nil, "not-implemented"; -- Only trimming the oldest messages
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
181 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
182 local before = query.before or query["end"] or "9999-12-31";
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
183 if type(before) == "number" then before = dt.date(before); else before = before:sub(1, 10); end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
184 local dates = dm.list_load(username, module.host, self.store) or empty;
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
185 local remaining_dates = {};
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
186 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
187 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
188 table.insert(remaining_dates, dates[d]);
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
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
190 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
191 table.sort(remaining_dates);
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
192 local ok, err = dm.list_store(username, module.host, self.store, remaining_dates);
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
193 if not ok then return ok, err; end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
194 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
195 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
196 os.remove(dm.getpath(username .. "@" .. dates[d], module.host, self.store, "list"));
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
197 os.remove(dm.getpath(username .. "@" .. dates[d], module.host, self.store, "xml"));
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
198 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
199 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
200 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
201 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
202
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
203 local provider = {};
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
204 function provider:open(store, typ)
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
205 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
206 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
207 end
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
208
8c0fbc685364 mod_storage_xmlarchive: New stanza archive-only storage module backed by plain text files
Kim Alvefur <zash@zash.se>
parents:
diff changeset
209 module:provides("storage", provider);