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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local match, sub = string.match, string.sub;
local nodeprep = require "util.encodings".stringprep.nodeprep;
local nameprep = require "util.encodings".stringprep.nameprep;
local resourceprep = require "util.encodings".stringprep.resourceprep;
local escapes = {
[" "] = "\\20"; ['"'] = "\\22";
["&"] = "\\26"; ["'"] = "\\27";
["/"] = "\\2f"; [":"] = "\\3a";
["<"] = "\\3c"; [">"] = "\\3e";
["@"] = "\\40"; ["\\"] = "\\5c";
};
local unescapes = {};
for k,v in pairs(escapes) do unescapes[v] = k; end
module "jid"
local function _split(jid)
if not jid then return; end
local node, nodepos = match(jid, "^([^@/]+)@()");
local host, hostpos = match(jid, "^([^@/]+)()", nodepos)
if node and not host then return nil, nil, nil; end
local resource = match(jid, "^/(.+)$", hostpos);
if (not host) or ((not resource) and #jid >= hostpos) then return nil, nil, nil; end
return node, host, resource;
end
split = _split;
function bare(jid)
local node, host = _split(jid);
if node and host then
return node.."@"..host;
end
return host;
end
local function _prepped_split(jid)
local node, host, resource = _split(jid);
if host then
if sub(host, -1, -1) == "." then -- Strip empty root label
host = sub(host, 1, -2);
end
host = nameprep(host);
if not host then return; end
if node then
node = nodeprep(node);
if not node then return; end
end
if resource then
resource = resourceprep(resource);
if not resource then return; end
end
return node, host, resource;
end
end
prepped_split = _prepped_split;
function prep(jid)
local node, host, resource = _prepped_split(jid);
if host then
if node then
host = node .. "@" .. host;
end
if resource then
host = host .. "/" .. resource;
end
end
return host;
end
function join(node, host, resource)
if node and host and resource then
return node.."@"..host.."/"..resource;
elseif node and host then
return node.."@"..host;
elseif host and resource then
return host.."/"..resource;
elseif host then
return host;
end
return nil; -- Invalid JID
end
function compare(jid, acl)
-- compare jid to single acl rule
-- TODO compare to table of rules?
local jid_node, jid_host, jid_resource = _split(jid);
local acl_node, acl_host, acl_resource = _split(acl);
if ((acl_node ~= nil and acl_node == jid_node) or acl_node == nil) and
((acl_host ~= nil and acl_host == jid_host) or acl_host == nil) and
((acl_resource ~= nil and acl_resource == jid_resource) or acl_resource == nil) then
return true
end
return false
end
function escape(s) return s and (s:gsub(".", escapes)); end
function unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
return _M;
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