1
0
Fork 0
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

434 lines
11 KiB

12 years ago
-- 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 t_insert = table.insert;
local t_concat = table.concat;
local t_remove = table.remove;
local t_concat = table.concat;
local s_format = string.format;
local s_match = string.match;
local tostring = tostring;
local setmetatable = setmetatable;
local getmetatable = getmetatable;
local pairs = pairs;
local ipairs = ipairs;
local type = type;
local next = next;
local print = print;
local unpack = unpack;
local s_gsub = string.gsub;
local s_char = string.char;
local s_find = string.find;
local os = os;
local log = require "util.logger".init("stanzarouter")
local do_pretty_printing = not os.getenv("WINDIR");
local getstyle, getstring;
if do_pretty_printing then
local ok, termcolours = pcall(require, "util.termcolours");
if ok then
getstyle, getstring = termcolours.getstyle, termcolours.getstring;
else
do_pretty_printing = nil;
end
end
local xmlns_stanzas = "urn:ietf:params:xml:ns:xmpp-stanzas";
module "stanza"
stanza_mt = { __type = "stanza" };
stanza_mt.__index = stanza_mt;
local stanza_mt = stanza_mt;
function stanza(name, attr)
local stanza = { name = name, attr = attr or {}, tags = {} };
return setmetatable(stanza, stanza_mt);
end
local stanza = stanza;
function stanza_mt:query(xmlns)
return self:tag("query", { xmlns = xmlns });
end
function stanza_mt:body(text, attr)
return self:tag("body", attr):text(text);
end
function stanza_mt:tag(name, attrs)
local s = stanza(name, attrs);
local last_add = self.last_add;
if not last_add then last_add = {}; self.last_add = last_add; end
(last_add[#last_add] or self):add_direct_child(s);
t_insert(last_add, s);
return self;
end
function stanza_mt:text(text)
local last_add = self.last_add;
(last_add and last_add[#last_add] or self):add_direct_child(text);
return self;
end
function stanza_mt:up()
local last_add = self.last_add;
if last_add then t_remove(last_add); end
return self;
end
function stanza_mt:reset()
self.last_add = nil;
return self;
end
function stanza_mt:add_direct_child(child)
if type(child) == "table" then
t_insert(self.tags, child);
end
t_insert(self, child);
end
function stanza_mt:add_child(child)
local last_add = self.last_add;
(last_add and last_add[#last_add] or self):add_direct_child(child);
return self;
end
function stanza_mt:get_child(name, xmlns)
for _, child in ipairs(self.tags) do
if (not name or child.name == name)
and ((not xmlns and self.attr.xmlns == child.attr.xmlns)
or child.attr.xmlns == xmlns) then
return child;
end
end
end
function stanza_mt:get_child_text(name, xmlns)
local tag = self:get_child(name, xmlns);
if tag then
return tag:get_text();
end
return nil;
end
function stanza_mt:child_with_name(name)
for _, child in ipairs(self.tags) do
if child.name == name then return child; end
end
end
function stanza_mt:child_with_ns(ns)
for _, child in ipairs(self.tags) do
if child.attr.xmlns == ns then return child; end
end
end
function stanza_mt:children()
local i = 0;
return function (a)
i = i + 1
return a[i];
end, self, i;
end
function stanza_mt:childtags(name, xmlns)
xmlns = xmlns or self.attr.xmlns;
local tags = self.tags;
local start_i, max_i = 1, #tags;
return function ()
for i = start_i, max_i do
local v = tags[i];
if (not name or v.name == name)
and (not xmlns or xmlns == v.attr.xmlns) then
start_i = i+1;
return v;
end
end
end;
end
function stanza_mt:maptags(callback)
local tags = self.tags;
local n_children, n_tags, curr_tag = #self, #tags, #tags;
local i = curr_tag
while i > 0 do
if self[curr_tag] == tags[curr_tag] then
local ret = callback(self[curr_tag])
if ret == nil then
t_remove(self, curr_tag);
t_remove(tags, curr_tag);
n_children = n_children - 1;
n_tags = n_tags - 1;
else
self[curr_tag] = ret;
tags[curr_tag] = ret;
end
curr_tag = curr_tag - 1;
end
i = i - 1
end
-- local i = 1;
-- while curr_tag <= n_tags do
-- log("debug", tostring(self[i]))
-- log("debug", tostring(tags[curr_tag]))
-- if self[i] == tags[curr_tag] then
-- local ret = callback(self[i]);
-- if ret == nil then
-- t_remove(self, i);
-- t_remove(tags, curr_tag);
-- n_children = n_children - 1;
-- n_tags = n_tags - 1;
-- else
-- self[i] = ret;
-- tags[i] = ret;
-- end
-- i = i + 1;
-- curr_tag = curr_tag + 1;
-- end
return self;
end
local xml_escape
do
local escape_table = { ["'"] = "&apos;", ["\""] = "&quot;", ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;" };
function xml_escape(str) return (s_gsub(str, "['&<>\"]", escape_table)); end
_M.xml_escape = xml_escape;
end
local function _dostring(t, buf, self, xml_escape, parentns)
local nsid = 0;
local name = t.name
t_insert(buf, "<"..name);
for k, v in pairs(t.attr) do
if s_find(k, "\1", 1, true) then
local ns, attrk = s_match(k, "^([^\1]*)\1?(.*)$");
nsid = nsid + 1;
t_insert(buf, " xmlns:ns"..nsid.."='"..xml_escape(ns).."' ".."ns"..nsid..":"..attrk.."='"..xml_escape(v).."'");
elseif not(k == "xmlns" and v == parentns) then
t_insert(buf, " "..k.."='"..xml_escape(v).."'");
end
end
local len = #t;
if len == 0 then
t_insert(buf, "/>");
else
t_insert(buf, ">");
for n=1,len do
local child = t[n];
if child.name then
self(child, buf, self, xml_escape, t.attr.xmlns);
else
t_insert(buf, xml_escape(child));
end
end
t_insert(buf, "</"..name..">");
end
end
function stanza_mt.__tostring(t)
local buf = {};
_dostring(t, buf, _dostring, xml_escape, nil);
return t_concat(buf);
end
function stanza_mt.top_tag(t)
local attr_string = "";
if t.attr then
for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(" %s='%s'", k, xml_escape(tostring(v))); end end
end
return s_format("<%s%s>", t.name, attr_string);
end
function stanza_mt.get_text(t)
if #t.tags == 0 then
return t_concat(t);
end
end
function stanza_mt.get_error(stanza)
local type, condition, text;
local error_tag = stanza:get_child("error");
if not error_tag then
return nil, nil, nil;
end
type = error_tag.attr.type;
for child in error_tag:childtags() do
if child.attr.xmlns == xmlns_stanzas then
if not text and child.name == "text" then
text = child:get_text();
elseif not condition then
condition = child.name;
end
if condition and text then
break;
end
end
end
return type, condition or "undefined-condition", text;
end
function stanza_mt.__add(s1, s2)
return s1:add_direct_child(s2);
end
do
local id = 0;
function new_id()
id = id + 1;
return "lx"..id;
end
end
function preserialize(stanza)
local s = { name = stanza.name, attr = stanza.attr };
for _, child in ipairs(stanza) do
if type(child) == "table" then
t_insert(s, preserialize(child));
else
t_insert(s, child);
end
end
return s;
end
function deserialize(stanza)
-- Set metatable
if stanza then
local attr = stanza.attr;
for i=1,#attr do attr[i] = nil; end
local attrx = {};
for att in pairs(attr) do
if s_find(att, "|", 1, true) and not s_find(att, "\1", 1, true) then
local ns,na = s_match(att, "^([^|]+)|(.+)$");
attrx[ns.."\1"..na] = attr[att];
attr[att] = nil;
end
end
for a,v in pairs(attrx) do
attr[a] = v;
end
setmetatable(stanza, stanza_mt);
for _, child in ipairs(stanza) do
if type(child) == "table" then
deserialize(child);
end
end
if not stanza.tags then
-- Rebuild tags
local tags = {};
for _, child in ipairs(stanza) do
if type(child) == "table" then
t_insert(tags, child);
end
end
stanza.tags = tags;
end
end
return stanza;
end
local function _clone(stanza)
local attr, tags = {}, {};
for k,v in pairs(stanza.attr) do attr[k] = v; end
local new = { name = stanza.name, attr = attr, tags = tags };
for i=1,#stanza do
local child = stanza[i];
if child.name then
child = _clone(child);
t_insert(tags, child);
end
t_insert(new, child);
end
return setmetatable(new, stanza_mt);
end
clone = _clone;
function message(attr, body)
if not body then
return stanza("message", attr);
else
return stanza("message", attr):tag("body"):text(body):up();
end
end
function iq(attr)
if attr and not attr.id then attr.id = new_id(); end
return stanza("iq", attr or { id = new_id() });
end
function reply(orig)
return stanza(orig.name, orig.attr and { to = orig.attr.from, from = orig.attr.to, id = orig.attr.id, type = ((orig.name == "iq" and "result") or orig.attr.type) });
end
do
local xmpp_stanzas_attr = { xmlns = xmlns_stanzas };
function error_reply(orig, type, condition, message)
local t = reply(orig);
t.attr.type = "error";
t:tag("error", {type = type}) --COMPAT: Some day xmlns:stanzas goes here
:tag(condition, xmpp_stanzas_attr):up();
if (message) then t:tag("text", xmpp_stanzas_attr):text(message):up(); end
return t; -- stanza ready for adding app-specific errors
end
end
function presence(attr)
return stanza("presence", attr);
end
if do_pretty_printing then
local style_attrk = getstyle("yellow");
local style_attrv = getstyle("red");
local style_tagname = getstyle("red");
local style_punc = getstyle("magenta");
local attr_format = " "..getstring(style_attrk, "%s")..getstring(style_punc, "=")..getstring(style_attrv, "'%s'");
local top_tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">");
--local tag_format = getstring(style_punc, "<")..getstring(style_tagname, "%s").."%s"..getstring(style_punc, ">").."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
local tag_format = top_tag_format.."%s"..getstring(style_punc, "</")..getstring(style_tagname, "%s")..getstring(style_punc, ">");
function stanza_mt.pretty_print(t)
local children_text = "";
for n, child in ipairs(t) do
if type(child) == "string" then
children_text = children_text .. xml_escape(child);
else
children_text = children_text .. child:pretty_print();
end
end
local attr_string = "";
if t.attr then
for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(attr_format, k, tostring(v)); end end
end
return s_format(tag_format, t.name, attr_string, children_text, t.name);
end
function stanza_mt.pretty_top_tag(t)
local attr_string = "";
if t.attr then
for k, v in pairs(t.attr) do if type(k) == "string" then attr_string = attr_string .. s_format(attr_format, k, tostring(v)); end end
end
return s_format(top_tag_format, t.name, attr_string);
end
else
-- Sorry, fresh out of colours for you guys ;)
stanza_mt.pretty_print = stanza_mt.__tostring;
stanza_mt.pretty_top_tag = stanza_mt.top_tag;
end
return _M;