prosody
ca7f8e60410a
util/rsm.lua

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util/rsm.lua @ 8433:ca7f8e60410a

util.ip: Add a method returning a normalized IP address
author Kim Alvefur <zash@zash.se>
date Fri, 01 Dec 2017 04:33:27 +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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Kim Alvefur <zash@zash.se>
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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 };