prosody
8c60d7b4a0c1
util/jid.lua

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util/jid.lua @ 7610:8c60d7b4a0c1

configure: Indicate that LUA_INCDIR is set in openbsd preset
author Kim Alvefur <zash@zash.se>
date Fri, 19 Aug 2016 15:50:57 +0200
parent 7321:a7199fc8a50e
child 7670:2be85cb3bc66
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rev   line source
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10
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11 local select = select;
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12 local match, sub = string.match, string.sub;
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13 local nodeprep = require "util.encodings".stringprep.nodeprep;
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14 local nameprep = require "util.encodings".stringprep.nameprep;
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15 local resourceprep = require "util.encodings".stringprep.resourceprep;
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16
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17 local escapes = {
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18 [" "] = "\\20"; ['"'] = "\\22";
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19 ["&"] = "\\26"; ["'"] = "\\27";
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20 ["/"] = "\\2f"; [":"] = "\\3a";
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21 ["<"] = "\\3c"; [">"] = "\\3e";
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22 ["@"] = "\\40"; ["\\"] = "\\5c";
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23 };
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24 local unescapes = {};
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25 for k,v in pairs(escapes) do unescapes[v] = k; end
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27 local _ENV = nil;
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29 local function split(jid)
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30 if not jid then return; end
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31 local node, nodepos = match(jid, "^([^@/]+)@()");
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32 local host, hostpos = match(jid, "^([^@/]+)()", nodepos)
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33 if node and not host then return nil, nil, nil; end
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34 local resource = match(jid, "^/(.+)$", hostpos);
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35 if (not host) or ((not resource) and #jid >= hostpos) then return nil, nil, nil; end
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36 return node, host, resource;
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37 end
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38
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39 local function bare(jid)
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40 local node, host = split(jid);
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41 if node and host then
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42 return node.."@"..host;
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43 end
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44 return host;
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45 end
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46
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47 local function prepped_split(jid)
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48 local node, host, resource = split(jid);
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49 if host then
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50 if sub(host, -1, -1) == "." then -- Strip empty root label
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51 host = sub(host, 1, -2);
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52 end
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53 host = nameprep(host);
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54 if not host then return; end
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55 if node then
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56 node = nodeprep(node);
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57 if not node then return; end
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58 end
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59 if resource then
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60 resource = resourceprep(resource);
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61 if not resource then return; end
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62 end
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63 return node, host, resource;
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64 end
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65 end
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66
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67 local function join(node, host, resource)
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68 if not host then return end
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69 if node and resource then
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70 return node.."@"..host.."/"..resource;
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71 elseif node then
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72 return node.."@"..host;
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73 elseif resource then
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74 return host.."/"..resource;
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75 end
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76 return host;
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77 end
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78
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79 local function prep(jid)
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80 local node, host, resource = prepped_split(jid);
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81 return join(node, host, resource);
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82 end
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83
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84 local function compare(jid, acl)
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85 -- compare jid to single acl rule
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86 -- TODO compare to table of rules?
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87 local jid_node, jid_host, jid_resource = split(jid);
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88 local acl_node, acl_host, acl_resource = split(acl);
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89 if ((acl_node ~= nil and acl_node == jid_node) or acl_node == nil) and
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90 ((acl_host ~= nil and acl_host == jid_host) or acl_host == nil) and
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91 ((acl_resource ~= nil and acl_resource == jid_resource) or acl_resource == nil) then
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92 return true
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93 end
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94 return false
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95 end
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96
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97 local function node(jid)
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98 return (select(1, split(jid)));
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99 end
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100
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101 local function host(jid)
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102 return (select(2, split(jid)));
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103 end
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104
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105 local function resource(jid)
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106 return (select(3, split(jid)));
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107 end
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108
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109 local function escape(s) return s and (s:gsub(".", escapes)); end
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110 local function unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
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111
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112 return {
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113 split = split;
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114 bare = bare;
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115 prepped_split = prepped_split;
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116 join = join;
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117 prep = prep;
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118 compare = compare;
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119 node = node;
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120 host = host;
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121 resource = resource;
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122 escape = escape;
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123 unescape = unescape;
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124 };