prosody
1937b3c3efb5
util/rsm.lua

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util/rsm.lua @ 11540:1937b3c3efb5 0.11

mod_c2s, mod_s2s, mod_component, mod_bosh, mod_websockets: Set default stanza size limits c2s/bosh/ws streams will default to 256KB, s2s and components to 512KB. These values are aligned with ejabberd's default settings, which should reduce issues related to inconsistent size limits between servers on the XMPP network. The previous default (10MB) is excessive for any production server, and allows significant memory usage by even unauthenticated sessions.
author Matthew Wild <mwild1@gmail.com>
date Fri, 07 May 2021 17:03:49 +0100
parent 7852:e594010e1ba0
child 10761:b53193bb21cc
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7852
e594010e1ba0 util.rsm: Add copyright header
Kim Alvefur <zash@zash.se>
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2017 Matthew Wild
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3 -- Copyright (C) 2008-2017 Waqas Hussain
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4 -- Copyright (C) 2011-2017 Kim Alvefur
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9 -- XEP-0313: Message Archive Management for Prosody
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10 --
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11
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12 local stanza = require"util.stanza".stanza;
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13 local tostring, tonumber = tostring, tonumber;
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14 local type = type;
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15 local pairs = pairs;
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16
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17 local xmlns_rsm = 'http://jabber.org/protocol/rsm';
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18
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19 local element_parsers = {};
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20
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21 do
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22 local parsers = element_parsers;
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23 local function xs_int(st)
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24 return tonumber((st:get_text()));
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25 end
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26 local function xs_string(st)
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27 return st:get_text();
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28 end
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29
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30 parsers.after = xs_string;
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31 parsers.before = function(st)
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32 local text = st:get_text();
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33 return text == "" or text;
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34 end;
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35 parsers.max = xs_int;
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36 parsers.index = xs_int;
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37
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38 parsers.first = function(st)
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39 return { index = tonumber(st.attr.index); st:get_text() };
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40 end;
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41 parsers.last = xs_string;
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42 parsers.count = xs_int;
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43 end
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44
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45 local element_generators = setmetatable({
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46 first = function(st, data)
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47 if type(data) == "table" then
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48 st:tag("first", { index = data.index }):text(data[1]):up();
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49 else
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50 st:tag("first"):text(tostring(data)):up();
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51 end
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52 end;
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53 before = function(st, data)
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54 if data == true then
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55 st:tag("before"):up();
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56 else
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57 st:tag("before"):text(tostring(data)):up();
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58 end
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59 end
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60 }, {
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61 __index = function(_, name)
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62 return function(st, data)
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63 st:tag(name):text(tostring(data)):up();
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64 end
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65 end;
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66 });
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67
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68
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69 local function parse(set)
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70 local rs = {};
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71 for tag in set:childtags() do
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72 local name = tag.name;
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73 local parser = name and element_parsers[name];
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74 if parser then
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75 rs[name] = parser(tag);
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76 end
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77 end
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78 return rs;
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79 end
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80
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81 local function generate(t)
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82 local st = stanza("set", { xmlns = xmlns_rsm });
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83 for k,v in pairs(t) do
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84 if element_parsers[k] then
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85 element_generators[k](st, v);
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86 end
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87 end
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88 return st;
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89 end
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90
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91 local function get(st)
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92 local set = st:get_child("set", xmlns_rsm);
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93 if set and #set.tags > 0 then
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94 return parse(set);
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95 end
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96 end
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97
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98 return { parse = parse, generate = generate, get = get };