diff options
Diffstat (limited to 'util/xmppstream.lua')
| -rw-r--r-- | util/xmppstream.lua | 100 |
1 files changed, 54 insertions, 46 deletions
diff --git a/util/xmppstream.lua b/util/xmppstream.lua index cbdadd9b..550170c9 100644 --- a/util/xmppstream.lua +++ b/util/xmppstream.lua @@ -1,7 +1,7 @@ -- 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. -- @@ -9,21 +9,27 @@ local lxp = require "lxp"; local st = require "util.stanza"; +local stanza_mt = st.stanza_mt; +local error = error; local tostring = tostring; local t_insert = table.insert; local t_concat = table.concat; +local t_remove = table.remove; +local setmetatable = setmetatable; -local default_log = require "util.logger".init("xmppstream"); - -local error = error; +-- COMPAT: w/LuaExpat 1.1.0 +local lxp_supports_doctype = pcall(lxp.new, { StartDoctypeDecl = false }); module "xmppstream" local new_parser = lxp.new; -local ns_prefixes = { - ["http://www.w3.org/XML/1998/namespace"] = "xml"; +local xml_namespace = { + ["http://www.w3.org/XML/1998/namespace\1lang"] = "xml:lang"; + ["http://www.w3.org/XML/1998/namespace\1space"] = "xml:space"; + ["http://www.w3.org/XML/1998/namespace\1base"] = "xml:base"; + ["http://www.w3.org/XML/1998/namespace\1id"] = "xml:id"; }; local xmlns_streams = "http://etherx.jabber.org/streams"; @@ -36,29 +42,28 @@ _M.ns_pattern = ns_pattern; function new_sax_handlers(session, stream_callbacks) local xml_handlers = {}; - - local log = session.log or default_log; - + local cb_streamopened = stream_callbacks.streamopened; local cb_streamclosed = stream_callbacks.streamclosed; - local cb_error = stream_callbacks.error or function(session, e) error("XML stream error: "..tostring(e)); end; + local cb_error = stream_callbacks.error or function(session, e, stanza) error("XML stream error: "..tostring(e)..(stanza and ": "..tostring(stanza) or ""),2); end; local cb_handlestanza = stream_callbacks.handlestanza; - + local stream_ns = stream_callbacks.stream_ns or xmlns_streams; local stream_tag = stream_callbacks.stream_tag or "stream"; if stream_ns ~= "" then stream_tag = stream_ns..ns_separator..stream_tag; end local stream_error_tag = stream_ns..ns_separator..(stream_callbacks.error_tag or "error"); - + local stream_default_ns = stream_callbacks.default_ns; - + + local stack = {}; local chardata, stanza = {}; local non_streamns_depth = 0; function xml_handlers:StartElement(tagname, attr) if stanza and #chardata > 0 then -- We have some character data in the buffer - stanza:text(t_concat(chardata)); + t_insert(stanza, t_concat(chardata)); chardata = {}; end local curr_ns,name = tagname:match(ns_pattern); @@ -70,21 +75,17 @@ function new_sax_handlers(session, stream_callbacks) attr.xmlns = curr_ns; non_streamns_depth = non_streamns_depth + 1; end - - -- FIXME !!!!! + for i=1,#attr do local k = attr[i]; attr[i] = nil; - local ns, nm = k:match(ns_pattern); - if nm ~= "" then - ns = ns_prefixes[ns]; - if ns then - attr[ns..":"..nm] = attr[k]; - attr[k] = nil; - end + local xmlk = xml_namespace[k]; + if xmlk then + attr[xmlk] = attr[k]; + attr[k] = nil; end end - + if not stanza then --if we are not currently inside a stanza if session.notopen then if tagname == stream_tag then @@ -101,10 +102,14 @@ function new_sax_handlers(session, stream_callbacks) if curr_ns == "jabber:client" and name ~= "iq" and name ~= "presence" and name ~= "message" then cb_error(session, "invalid-top-level-element"); end - - stanza = st.stanza(name, attr); + + stanza = setmetatable({ name = name, attr = attr, tags = {} }, stanza_mt); else -- we are inside a stanza, so add a tag - stanza:tag(name, attr); + t_insert(stack, stanza); + local oldstanza = stanza; + stanza = setmetatable({ name = name, attr = attr, tags = {} }, stanza_mt); + t_insert(oldstanza, stanza); + t_insert(oldstanza.tags, stanza); end end function xml_handlers:CharacterData(data) @@ -119,12 +124,11 @@ function new_sax_handlers(session, stream_callbacks) if stanza then if #chardata > 0 then -- We have some character data in the buffer - stanza:text(t_concat(chardata)); + t_insert(stanza, t_concat(chardata)); chardata = {}; end -- Complete stanza - local last_add = stanza.last_add; - if not last_add or #last_add == 0 then + if #stack == 0 then if tagname ~= stream_error_tag then cb_handlestanza(session, stanza); else @@ -132,33 +136,37 @@ function new_sax_handlers(session, stream_callbacks) end stanza = nil; else - stanza:up(); + stanza = t_remove(stack); end else - if tagname == stream_tag then - if cb_streamclosed then - cb_streamclosed(session); - end - else - local curr_ns,name = tagname:match(ns_pattern); - if name == "" then - curr_ns, name = "", curr_ns; - end - cb_error(session, "parse-error", "unexpected-element-close", name); + if cb_streamclosed then + cb_streamclosed(session); end - stanza, chardata = nil, {}; end end - + + local function restricted_handler(parser) + cb_error(session, "parse-error", "restricted-xml", "Restricted XML, see RFC 6120 section 11.1."); + if not parser.stop or not parser:stop() then + error("Failed to abort parsing"); + end + end + + if lxp_supports_doctype then + xml_handlers.StartDoctypeDecl = restricted_handler; + end + xml_handlers.Comment = restricted_handler; + xml_handlers.ProcessingInstruction = restricted_handler; + local function reset() stanza, chardata = nil, {}; + stack = {}; end - + local function set_session(stream, new_session) session = new_session; - log = new_session.log or default_log; end - + return xml_handlers, { reset = reset, set_session = set_session }; end |