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prosody
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util/xmppstream.lua @ 3522:4646b5b039ca
mod_private: Updated to use the new events API. Smaller, more robust.
author | Waqas Hussain <waqas20@gmail.com> |
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date | Sat, 16 Oct 2010 04:11:48 +0500 |
parent | 3444:e6a78e15fed2 |
child | 3540:bc139431830b |
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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 lxp = require "lxp"; local st = require "util.stanza"; local tostring = tostring; local t_insert = table.insert; local t_concat = table.concat; local default_log = require "util.logger".init("xmlhandlers"); local error = error; module "xmppstream" local new_parser = lxp.new; local ns_prefixes = { ["http://www.w3.org/XML/1998/namespace"] = "xml"; }; local xmlns_streams = "http://etherx.jabber.org/streams"; local ns_separator = "\1"; local ns_pattern = "^([^"..ns_separator.."]*)"..ns_separator.."?(.*)$"; 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_handlestanza = stream_callbacks.handlestanza; local stream_ns = stream_callbacks.stream_ns or xmlns_streams; local stream_tag = stream_ns..ns_separator..(stream_callbacks.stream_tag or "stream"); local stream_error_tag = stream_ns..ns_separator..(stream_callbacks.error_tag or "error"); local stream_default_ns = stream_callbacks.default_ns; local chardata, stanza = {}; 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)); chardata = {}; end local curr_ns,name = tagname:match(ns_pattern); if name == "" then curr_ns, name = "", curr_ns; end if curr_ns ~= stream_default_ns then attr.xmlns = curr_ns; 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 end end if not stanza then --if we are not currently inside a stanza if session.notopen then if tagname == stream_tag then if cb_streamopened then cb_streamopened(session, attr); end else -- Garbage before stream? cb_error(session, "no-stream"); end return; end 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); else -- we are inside a stanza, so add a tag stanza:tag(name, attr); end end function xml_handlers:CharacterData(data) if stanza then t_insert(chardata, data); end end function xml_handlers:EndElement(tagname) if stanza then if #chardata > 0 then -- We have some character data in the buffer stanza:text(t_concat(chardata)); chardata = {}; end -- Complete stanza if #stanza.last_add == 0 then if tagname ~= stream_error_tag then cb_handlestanza(session, stanza); else cb_error(session, "stream-error", stanza); end stanza = nil; else stanza:up(); 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); end stanza, chardata = nil, {}; end end local function reset() stanza, chardata = nil, {}; 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 function new(session, stream_callbacks) local handlers, meta = new_sax_handlers(session, stream_callbacks); local parser = new_parser(handlers, ns_separator); local parse = parser.parse; return { reset = function () parser = new_parser(handlers, ns_separator); parse = parser.parse; meta.reset(); end, feed = function (self, data) return parse(parser, data); end, set_session = meta.set_session; }; end return _M;