X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=util%2Fstanza.lua;h=de83977f38fb41d717975b18fbcb3ee29caf01ac;hb=492c253d150aeb7edb6687eb9bf085be6c33133a;hp=6af7e2b22e386b3ff045bea23c5badc0b7d39463;hpb=67081a9864d45796f59658ccd4b779ffbe0d44e0;p=prosody.git diff --git a/util/stanza.lua b/util/stanza.lua index 6af7e2b2..de83977f 100644 --- a/util/stanza.lua +++ b/util/stanza.lua @@ -1,20 +1,9 @@ --- Prosody IM v0.2 --- Copyright (C) 2008 Matthew Wild --- Copyright (C) 2008 Waqas Hussain +-- Prosody IM +-- Copyright (C) 2008-2010 Matthew Wild +-- Copyright (C) 2008-2010 Waqas Hussain -- --- This program is free software; you can redistribute it and/or --- modify it under the terms of the GNU General Public License --- as published by the Free Software Foundation; either version 2 --- of the License, or (at your option) any later version. --- --- This program is distributed in the hope that it will be useful, --- but WITHOUT ANY WARRANTY; without even the implied warranty of --- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the --- GNU General Public License for more details. --- --- You should have received a copy of the GNU General Public License --- along with this program; if not, write to the Free Software --- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +-- This project is MIT/X11 licensed. Please see the +-- COPYING file in the source package for more information. -- @@ -23,8 +12,10 @@ 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; @@ -32,22 +23,34 @@ 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 do_pretty_printing = not os.getenv("WINDIR"); -local getstyle, getstring = require "util.termcolours".getstyle, require "util.termcolours".getstring; +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 log = require "util.logger".init("stanza"); +local xmlns_stanzas = "urn:ietf:params:xml:ns:xmpp-stanzas"; module "stanza" -stanza_mt = {}; +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 = {}, last_add = {}}; + 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 }); @@ -59,18 +62,27 @@ end function stanza_mt:tag(name, attrs) local s = stanza(name, attrs); - (self.last_add[#self.last_add] or self):add_direct_child(s); - t_insert(self.last_add, s); + 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) - (self.last_add[#self.last_add] or self):add_direct_child(text); - return self; + 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() - t_remove(self.last_add); + 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 @@ -82,72 +94,132 @@ function stanza_mt:add_direct_child(child) end function stanza_mt:add_child(child) - (self.last_add[#self.last_add] or self):add_direct_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) do + 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 - local v = a[i] - if v then return v; end + return a[i]; end, self, i; - end -function stanza_mt:childtags() - local i = 0; - return function (a) - i = i + 1 - local v = self.tags[i] - if v then return v; end - end, self.tags[1], i; - + +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 -do - local xml_entities = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; - function xml_escape(s) return s_gsub(s, "['&<>\"]", xml_entities); end -end - -local xml_escape = xml_escape; - -local function dostring(t, buf, self, xml_escape) - t_insert(buf, "<"); - t_insert(buf, t.name); - for k, v in pairs(t.attr) do if type(k) == "string" then - t_insert(buf, " "); - t_insert(buf, k); - t_insert(buf, "='"); - t_insert(buf, (xml_escape(tostring(v)))); - t_insert(buf, "'"); - end end - t_insert(buf, ">"); - for n, child in ipairs(t) do - if child.name then - self(child, buf, self, xml_escape); - else - t_insert(buf, (xml_escape(child))); +function stanza_mt:maptags(callback) + local tags, curr_tag = self.tags, 1; + local n_children, n_tags = #self, #tags; + + local i = 1; + while curr_tag <= n_tags do + 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 end - t_insert(buf, ""); + return self; +end + +local xml_escape +do + local escape_table = { ["'"] = "'", ["\""] = """, ["<"] = "<", [">"] = ">", ["&"] = "&" }; + 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, ""); + end +end function stanza_mt.__tostring(t) local buf = {}; - dostring(t, buf, dostring, xml_escape); + _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 @@ -156,17 +228,47 @@ function stanza_mt.top_tag(t) 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 + local id = 0; + function new_id() + id = id + 1; + return "lx"..id; + end end function preserialize(stanza) @@ -184,6 +286,19 @@ 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 @@ -205,11 +320,27 @@ function deserialize(stanza) 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); + return stanza("message", attr):tag("body"):text(body):up(); end end function iq(attr) @@ -221,14 +352,16 @@ 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 -function error_reply(orig, type, condition, message, clone) - local t = reply(orig); - t.attr.type = "error"; - -- TODO use clone - t:tag("error", {type = type}) - :tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); - if (message) then t:tag("text"):text(message):up(); end - return t; -- stanza ready for adding app-specific errors +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) @@ -248,7 +381,7 @@ if do_pretty_printing then function stanza_mt.pretty_print(t) local children_text = ""; for n, child in ipairs(t) do - if type(child) == "string" then + if type(child) == "string" then children_text = children_text .. xml_escape(child); else children_text = children_text .. child:pretty_print();