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annotate mod_message_logging/mod_message_logging.lua @ 1159:c56a1d449cad

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mod_auth_external: Add non-blocking mode (requires trunk, libevent and lpty 1.0.1). Our first complete non-blocking auth module!
author Matthew Wild <mwild1@gmail.com>
date Tue, 13 Aug 2013 23:37:31 +0100
parents ba220790a59c
children 7dbde05b48a9
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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 handle_incoming_message(event)
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54 local origin, stanza = event.origin, event.stanza;
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55 local message_type = stanza.attr.type;
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56
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57 if message_type == "error" then return; end
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58
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59 local from, to = jid_bare(stanza.attr.from), jid_bare(stanza.attr.to);
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60 local body = stanza:get_child("body");
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61 if not body then return; end
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62 body = body:get_text();
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63
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64 local f = open_files[to];
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65 if not f then return; end
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66 if message_type == "groupchat" then
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67 -- Add the nickname
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68 from = from.." <"..(select(3, jid_split(stanza.attr.from)) or "")..">";
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69 end
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70 body = body:gsub("\n", "\n "); -- Indent newlines
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71 f:write("RECV: ", from, ": ", body, "\n");
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72 f:flush();
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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" or message_type == "groupchat" 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);
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82 local body = stanza:get_child("body");
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83 if not body then return; end
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84 body = body:get_text();
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85
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86 local f = open_files[from];
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87 if not f then return; end
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88 body = body:gsub("\n", "\n "); -- Indent newlines
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89 f:write("SEND: ", to, ": ", body, "\n");
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90 f:flush();
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91 end
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92
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93
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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 module:hook("message/bare", handle_incoming_message, 1);
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102 module:hook("message/full", handle_incoming_message, 1);
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103
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104 module:hook("pre-message/bare", handle_outgoing_message, 1);
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105 module:hook("pre-message/full", handle_outgoing_message, 1);
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106 module:hook("pre-message/host", handle_outgoing_message, 1);
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107
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108 end
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109
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110 function module.command(arg)
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111 local command = table.remove(arg, 1);
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112 if command == "path" then
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113 print(get_user_path(arg[1]));
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114 else
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115 io.stderr:write("Unrecognised command: ", command);
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116 return 1;
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117 end
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118 return 0;
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119 end
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120
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121 function module.save()
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122 return { open_files = open_files };
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123 end
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124
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125 function module.restore(saved)
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126 open_files = setmetatable(saved.open_files or {}, open_files_mt);
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127 end