mirror of
https://github.com/bjc/prosody.git
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125 lines
3.1 KiB
Lua
125 lines
3.1 KiB
Lua
-- Prosody IM
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-- Copyright (C) 2008-2010 Matthew Wild
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-- Copyright (C) 2008-2010 Waqas Hussain
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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local select = select;
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local match, sub = string.match, string.sub;
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local nodeprep = require "util.encodings".stringprep.nodeprep;
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local nameprep = require "util.encodings".stringprep.nameprep;
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local resourceprep = require "util.encodings".stringprep.resourceprep;
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local escapes = {
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[" "] = "\\20"; ['"'] = "\\22";
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["&"] = "\\26"; ["'"] = "\\27";
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["/"] = "\\2f"; [":"] = "\\3a";
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["<"] = "\\3c"; [">"] = "\\3e";
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["@"] = "\\40"; ["\\"] = "\\5c";
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};
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local unescapes = {};
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for k,v in pairs(escapes) do unescapes[v] = k; end
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local _ENV = nil;
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-- luacheck: std none
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local function split(jid)
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if not jid then return; end
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local node, nodepos = match(jid, "^([^@/]+)@()");
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local host, hostpos = match(jid, "^([^@/]+)()", nodepos)
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if node and not host then return nil, nil, nil; end
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local resource = match(jid, "^/(.+)$", hostpos);
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if (not host) or ((not resource) and #jid >= hostpos) then return nil, nil, nil; end
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return node, host, resource;
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end
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local function bare(jid)
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local node, host = split(jid);
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if node and host then
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return node.."@"..host;
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end
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return host;
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end
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local function prepped_split(jid)
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local node, host, resource = split(jid);
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if host and host ~= "." then
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if sub(host, -1, -1) == "." then -- Strip empty root label
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host = sub(host, 1, -2);
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end
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host = nameprep(host);
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if not host then return; end
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if node then
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node = nodeprep(node);
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if not node then return; end
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end
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if resource then
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resource = resourceprep(resource);
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if not resource then return; end
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end
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return node, host, resource;
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end
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end
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local function join(node, host, resource)
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if not host then return end
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if node and resource then
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return node.."@"..host.."/"..resource;
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elseif node then
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return node.."@"..host;
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elseif resource then
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return host.."/"..resource;
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end
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return host;
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end
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local function prep(jid)
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local node, host, resource = prepped_split(jid);
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return join(node, host, resource);
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end
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local function compare(jid, acl)
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-- compare jid to single acl rule
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-- TODO compare to table of rules?
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local jid_node, jid_host, jid_resource = split(jid);
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local acl_node, acl_host, acl_resource = split(acl);
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if ((acl_node ~= nil and acl_node == jid_node) or acl_node == nil) and
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((acl_host ~= nil and acl_host == jid_host) or acl_host == nil) and
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((acl_resource ~= nil and acl_resource == jid_resource) or acl_resource == nil) then
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return true
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end
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return false
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end
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local function node(jid)
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return (select(1, split(jid)));
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end
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local function host(jid)
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return (select(2, split(jid)));
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end
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local function resource(jid)
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return (select(3, split(jid)));
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end
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local function escape(s) return s and (s:gsub(".", escapes)); end
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local function unescape(s) return s and (s:gsub("\\%x%x", unescapes)); end
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return {
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split = split;
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bare = bare;
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prepped_split = prepped_split;
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join = join;
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prep = prep;
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compare = compare;
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node = node;
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host = host;
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resource = resource;
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escape = escape;
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unescape = unescape;
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};
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