annotate mod_message_logging/mod_message_logging.lua @ 5593:6d0574bfbf5d

mod_client_management: Include software version in table (when known) Showing software versions could be useful for statistical reasons, e.g. determining how quickly (or not) users upgrade, but most importantly for revoking vulnerable clients versions in case of a security issue.
author Kim Alvefur <zash@zash.se>
date Thu, 13 Jul 2023 23:26:02 +0200
parents ba71d0ad5564
children
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1 module:set_global();
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2
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3 local jid_bare = require "util.jid".bare;
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4 local jid_split = require "util.jid".split;
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5
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6 local stat, mkdir = require "lfs".attributes, require "lfs".mkdir;
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7
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8 -- Get a filesystem-safe string
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9 local function fsencode_char(c)
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10 return ("%%%02x"):format(c:byte());
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11 end
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12 local function fsencode(s)
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13 return (s:gsub("[^%w._-@]", fsencode_char):gsub("^%.", "_"));
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14 end
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15
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16 local log_base_path = module:get_option("message_logging_dir", prosody.paths.data.."/message_logs");
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17 mkdir(log_base_path);
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18
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19 local function get_host_path(host)
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20 return log_base_path.."/"..fsencode(host);
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21 end
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22
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23 local function get_user_path(jid)
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24 local username, host = jid_split(jid);
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25 local base = get_host_path(host)..os.date("/%Y-%m-%d");
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26 if not stat(base) then
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27 mkdir(base);
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28 end
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29 return base.."/"..fsencode(username)..".msglog";
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30 end
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31
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32 local open_files_mt = { __index = function (open_files, jid)
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33 local f, err = io.open(get_user_path(jid), "a+");
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34 if not f then
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35 module:log("error", "Failed to open message log for writing [%s]: %s", jid, err);
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36 end
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37 rawset(open_files, jid, f);
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38 return f;
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39 end };
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40
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41 -- [user@host] = filehandle
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42 local open_files = setmetatable({}, open_files_mt);
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43
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44 function close_open_files()
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45 module:log("debug", "Closing all open files");
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46 for jid, filehandle in pairs(open_files) do
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47 filehandle:close();
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48 open_files[jid] = nil;
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49 end
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50 end
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51 module:hook_global("logging-reloaded", close_open_files);
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52
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53 local function write_to_log(log_jid, jid, prefix, body)
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54 if not body then return; end
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55 local f = open_files[log_jid];
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56 if not f then return; end
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57 body = body:gsub("\n", "\n "); -- Indent newlines
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58 f:write(os.date("%H:%M:%S "), prefix or "", prefix and ": " or "", jid, ": ", body, "\n");
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59 f:flush();
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60 end
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61
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62 local function handle_incoming_message(event)
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63 local origin, stanza = event.origin, event.stanza;
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64 local message_type = stanza.attr.type;
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65
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66 if message_type == "error" then return; end
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67
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68 local from, to = jid_bare(stanza.attr.from), jid_bare(stanza.attr.to or stanza.attr.from);
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69 if message_type == "groupchat" then
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70 from = from.." <"..(select(3, jid_split(stanza.attr.from)) or "")..">";
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71 end
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72 write_to_log(to, from, "RECV", stanza:get_child_text("body"));
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73 end
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74
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75 local function handle_outgoing_message(event)
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76 local origin, stanza = event.origin, event.stanza;
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77 local message_type = stanza.attr.type;
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78
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79 if message_type == "error" then return; end
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80
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81 local from, to = jid_bare(stanza.attr.from), jid_bare(stanza.attr.to or origin.full_jid);
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82 write_to_log(from, to, "SEND", stanza:get_child_text("body"));
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83 end
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84
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85 local function handle_muc_message(event)
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86 local stanza = event.stanza;
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87 if stanza.attr.type ~= "groupchat" then return; end
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88 local room = event.room or hosts[select(2, jid_split(stanza.attr.to))].modules.muc.rooms[stanza.attr.to];
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89 if not room then return; end
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90 local nick = select(3, jid_split(room._jid_nick[stanza.attr.from]));
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91 if not nick then return; end
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92 write_to_log(room.jid, jid_bare(stanza.attr.from).." <"..nick..">", "MESG", stanza:get_child_text("body"));
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93 end
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94
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95 function module.add_host(module)
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96 local host_base_path = get_host_path(module.host);
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97 if not stat(host_base_path) then
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98 mkdir(host_base_path);
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99 end
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100
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101 if hosts[module.host].modules.muc then
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102 module:hook("message/bare", handle_muc_message, 1);
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103 else
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104 module:hook("message/bare", handle_incoming_message, 1);
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105 module:hook("message/full", handle_incoming_message, 1);
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106
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107 module:hook("pre-message/bare", handle_outgoing_message, 1);
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108 module:hook("pre-message/full", handle_outgoing_message, 1);
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109 module:hook("pre-message/host", handle_outgoing_message, 1);
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110 end
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111
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112 end
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113
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114 function module.command(arg)
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115 local command = table.remove(arg, 1);
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116 if command == "path" then
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117 print(get_user_path(arg[1]));
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118 else
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119 io.stderr:write("Unrecognised command: ", command);
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120 return 1;
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121 end
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122 return 0;
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123 end
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124
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125 function module.save()
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126 return { open_files = open_files };
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127 end
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128
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129 function module.restore(saved)
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130 open_files = setmetatable(saved.open_files or {}, open_files_mt);
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131 end