prosody
f78c6f5fa090
util/jid.lua

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util/jid.lua @ 4407:f78c6f5fa090

util.jid: Added escape() and unescape().
author Waqas Hussain <waqas20@gmail.com>
date Tue, 01 Nov 2011 23:41:32 +0500
parent 3480:97831dfe7f72
child 5776:bd0ff8ae98a8
child 5944:f3817912e8b2
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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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11 local match = string.match;
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12 local nodeprep = require "util.encodings".stringprep.nodeprep;
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13 local nameprep = require "util.encodings".stringprep.nameprep;
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14 local resourceprep = require "util.encodings".stringprep.resourceprep;
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16 local escapes = {
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17 [" "] = "\\20"; ['"'] = "\\22";
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18 ["&"] = "\\26"; ["'"] = "\\27";
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19 ["/"] = "\\2f"; [":"] = "\\3a";
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20 ["<"] = "\\3c"; [">"] = "\\3e";
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21 ["@"] = "\\40"; ["\\"] = "\\5c";
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22 };
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23 local unescapes = {};
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24 for k,v in pairs(escapes) do unescapes[v] = k; end
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25
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26 module "jid"
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27
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28 local function _split(jid)
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29 if not jid then return; end
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30 local node, nodepos = match(jid, "^([^@/]+)@()");
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31 local host, hostpos = match(jid, "^([^@/]+)()", nodepos)
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32 if node and not host then return nil, nil, nil; end
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33 local resource = match(jid, "^/(.+)$", hostpos);
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34 if (not host) or ((not resource) and #jid >= hostpos) then return nil, nil, nil; end
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35 return node, host, resource;
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36 end
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37 split = _split;
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38
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39 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 host = nameprep(host);
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51 if not host then return; end
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52 if node then
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53 node = nodeprep(node);
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54 if not node then return; end
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55 end
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56 if resource then
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57 resource = resourceprep(resource);
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58 if not resource then return; end
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59 end
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60 return node, host, resource;
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61 end
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62 end
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63 prepped_split = _prepped_split;
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64
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65 function prep(jid)
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66 local node, host, resource = _prepped_split(jid);
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67 if host then
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68 if node then
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69 host = node .. "@" .. host;
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70 end
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71 if resource then
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72 host = host .. "/" .. resource;
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73 end
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74 end
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75 return host;
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76 end
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77
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78 function join(node, host, resource)
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79 if node and host and resource then
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80 return node.."@"..host.."/"..resource;
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81 elseif node and host then
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82 return node.."@"..host;
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83 elseif host and resource then
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84 return host.."/"..resource;
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85 elseif host then
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86 return host;
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87 end
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88 return nil; -- Invalid JID
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89 end
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90
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91 function compare(jid, acl)
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92 -- compare jid to single acl rule
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93 -- TODO compare to table of rules?
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94 local jid_node, jid_host, jid_resource = _split(jid);
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95 local acl_node, acl_host, acl_resource = _split(acl);
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96 if ((acl_node ~= nil and acl_node == jid_node) or acl_node == nil) and
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97 ((acl_host ~= nil and acl_host == jid_host) or acl_host == nil) and
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98 ((acl_resource ~= nil and acl_resource == jid_resource) or acl_resource == nil) then
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99 return true
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100 end
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101 return false
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102 end
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103
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104 function escape(s) return s and (s:gsub(".", escapes)); end
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105 function unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
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106
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107 return _M;