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annotate mod_offline_email/mod_offline_email.lua @ 1893:8064b5e346ab

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mod_pubsub_feeds/README: Update wording to be clearer
author Kim Alvefur <zash@zash.se>
date Sat, 03 Oct 2015 16:53:45 +0200
parents f1a0a0754b87
children bd71c97de1d0
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2 local jid_bare = require "util.jid".bare;
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3 local os_time = os.time;
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4 local t_concat = table.concat;
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5 local smtp = require "socket.smtp";
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6
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7 local smtp_server = module:get_option_string("smtp_server", "localhost");
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8 local smtp_user = module:get_option_string("smtp_username");
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9 local smtp_pass = module:get_option_string("smtp_password");
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11 local smtp_address = module:get_option("smtp_from") or ((smtp_user or "xmpp").."@"..(smtp_server or module.host));
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13 local queue_offline_emails = module:get_option("queue_offline_emails");
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14 if queue_offline_emails == true then queue_offline_emails = 300; end
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16 local send_message_as_email;
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18 module:hook("message/offline/handle", function(event)
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19 local stanza = event.stanza;
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20 local text = stanza:get_child_text("body");
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21 if text then
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22 return send_message_as_email(jid_bare(stanza.attr.to), jid_bare(stanza.attr.from), text);
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23 end
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24 end, 1);
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26 function send_message_as_email(address, from_address, message_text, subject)
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27 module:log("info", "Forwarding offline message to %s via email", address);
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28 local rcpt = "<"..address..">";
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29
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30 local mesgt = {
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31 headers = {
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32 to = address;
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33 subject = subject or ("Offline message from "..jid_bare(from_address));
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34 };
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35 body = message_text;
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36 };
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37
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38 local ok, err = smtp.send{ from = smtp_address, rcpt = rcpt, source = smtp.message(mesgt),
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39 server = smtp_server, user = smtp_user, password = smtp_pass };
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41 if not ok then
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42 module:log("error", "Failed to deliver to %s: %s", tostring(address), tostring(err));
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43 return;
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44 end
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45 return true;
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46 end
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48 if queue_offline_emails then
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49 local queues = {};
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50 local real_send_message_as_email = send_message_as_email;
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51 function send_message_as_email(address, from_address, message_text)
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52 local pair_key = address.."\0"..from_address;
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53 local queue = queues[pair_key];
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54 if not queue then
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55 queue = { from = smtp_address, to = address, messages = {} };
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56 queues[pair_key] = queue;
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58 module:add_timer(queue_offline_emails+5, function ()
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59 module:log("info", "Checking on %s", from_address);
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60 local current_time = os_time();
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61 local diff = current_time - queue.last_message_time;
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62 if diff > queue_offline_emails then
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63 module:log("info", "Enough silence, sending...");
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64 real_send_message_as_email(address, from_address, t_concat(queue.messages, "\n"), "You have "..#queue.messages.." offline message"..(#queue.messages == 1 and "" or "s").." from "..from_address)
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65 else
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66 module:log("info", "Next check in %d", queue_offline_emails - diff + 5);
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67 return queue_offline_emails - diff + 5;
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68 end
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69 end);
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70 end
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72 queue.last_message_time = os_time();
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74 local messages = queue.messages;
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75 messages[#messages+1] = message_text;
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76 return true;
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77 end
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78 end