prosody
6eb5d2bb11af
util/xmppstream.lua

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util/xmppstream.lua @ 10921:6eb5d2bb11af

util-src: Use the luaL_pushfail API added in Lua 5.4 to highlight all failure conditions Actually just an alias of pushnil, but it does make it more obvious where the failure conditions are, which is good for readability.
author Kim Alvefur <zash@zash.se>
date Sun, 07 Jun 2020 02:25:56 +0200
parent 10093:1266a63ba567
child 11358:ebbf8dca33d2
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local lxp = require "lxp";
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10 local st = require "util.stanza";
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11 local stanza_mt = st.stanza_mt;
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13 local error = error;
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14 local tostring = tostring;
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15 local t_insert = table.insert;
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16 local t_concat = table.concat;
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17 local t_remove = table.remove;
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18 local setmetatable = setmetatable;
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19
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20 -- COMPAT: w/LuaExpat 1.1.0
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21 local lxp_supports_doctype = pcall(lxp.new, { StartDoctypeDecl = false });
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22 local lxp_supports_xmldecl = pcall(lxp.new, { XmlDecl = false });
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23 local lxp_supports_bytecount = not not lxp.new({}).getcurrentbytecount;
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24
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25 local default_stanza_size_limit = 1024*1024*10; -- 10MB
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27 local _ENV = nil;
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28 -- luacheck: std none
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29
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30 local new_parser = lxp.new;
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31
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32 local xml_namespace = {
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33 ["http://www.w3.org/XML/1998/namespace\1lang"] = "xml:lang";
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34 ["http://www.w3.org/XML/1998/namespace\1space"] = "xml:space";
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35 ["http://www.w3.org/XML/1998/namespace\1base"] = "xml:base";
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36 ["http://www.w3.org/XML/1998/namespace\1id"] = "xml:id";
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37 };
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39 local xmlns_streams = "http://etherx.jabber.org/streams";
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40
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41 local ns_separator = "\1";
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42 local ns_pattern = "^([^"..ns_separator.."]*)"..ns_separator.."?(.*)$";
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43
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44 local function dummy_cb() end
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45
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46 local function new_sax_handlers(session, stream_callbacks, cb_handleprogress)
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47 local xml_handlers = {};
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48
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49 local cb_streamopened = stream_callbacks.streamopened;
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50 local cb_streamclosed = stream_callbacks.streamclosed;
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51 local cb_error = stream_callbacks.error or
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52 function(_, e, stanza)
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53 error("XML stream error: "..tostring(e)..(stanza and ": "..tostring(stanza) or ""),2);
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54 end;
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55 local cb_handlestanza = stream_callbacks.handlestanza;
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56 cb_handleprogress = cb_handleprogress or dummy_cb;
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57
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58 local stream_ns = stream_callbacks.stream_ns or xmlns_streams;
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59 local stream_tag = stream_callbacks.stream_tag or "stream";
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60 if stream_ns ~= "" then
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61 stream_tag = stream_ns..ns_separator..stream_tag;
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62 end
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63 local stream_error_tag = stream_ns..ns_separator..(stream_callbacks.error_tag or "error");
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64
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65 local stream_default_ns = stream_callbacks.default_ns;
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66
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67 local stream_lang = "en";
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68
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69 local stack = {};
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70 local chardata, stanza = {};
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71 local stanza_size = 0;
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72 local non_streamns_depth = 0;
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73 function xml_handlers:StartElement(tagname, attr)
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74 if stanza and #chardata > 0 then
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75 -- We have some character data in the buffer
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76 t_insert(stanza, t_concat(chardata));
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77 chardata = {};
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78 end
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79 local curr_ns,name = tagname:match(ns_pattern);
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80 if name == "" then
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81 curr_ns, name = "", curr_ns;
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82 end
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83
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84 if curr_ns ~= stream_default_ns or non_streamns_depth > 0 then
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85 attr.xmlns = curr_ns;
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86 non_streamns_depth = non_streamns_depth + 1;
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87 end
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88
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89 for i=1,#attr do
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90 local k = attr[i];
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91 attr[i] = nil;
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92 local xmlk = xml_namespace[k];
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93 if xmlk then
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94 attr[xmlk] = attr[k];
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95 attr[k] = nil;
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96 end
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97 end
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98
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99 if not stanza then --if we are not currently inside a stanza
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100 if lxp_supports_bytecount then
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101 stanza_size = self:getcurrentbytecount();
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102 end
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103 if session.notopen then
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104 if tagname == stream_tag then
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105 non_streamns_depth = 0;
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106 stream_lang = attr["xml:lang"] or stream_lang;
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107 if cb_streamopened then
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108 if lxp_supports_bytecount then
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109 cb_handleprogress(stanza_size);
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110 stanza_size = 0;
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111 end
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112 cb_streamopened(session, attr);
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113 end
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114 else
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115 -- Garbage before stream?
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116 cb_error(session, "no-stream", tagname);
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117 end
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118 return;
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119 end
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120 if curr_ns == "jabber:client" and name ~= "iq" and name ~= "presence" and name ~= "message" then
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Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
121 cb_error(session, "invalid-top-level-element");
1051
0327c569eb1a xmlhandlers: Fix tag pattern again for the default namespace
Matthew Wild <mwild1@gmail.com>
parents: 1003
diff changeset
122 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5311
diff changeset
123
3987
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
124 stanza = setmetatable({ name = name, attr = attr, tags = {} }, stanza_mt);
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
125 else -- we are inside a stanza, so add a tag
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
126 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
127 stanza_size = stanza_size + self:getcurrentbytecount();
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
128 end
3987
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
129 t_insert(stack, stanza);
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
130 local oldstanza = stanza;
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
131 stanza = setmetatable({ name = name, attr = attr, tags = {} }, stanza_mt);
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
132 t_insert(oldstanza, stanza);
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
133 t_insert(oldstanza.tags, stanza);
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
134 end
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
135 end
9020
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
136
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
137 function xml_handlers:StartCdataSection()
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
138 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
139 if stanza then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
140 stanza_size = stanza_size + self:getcurrentbytecount();
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
141 else
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
142 cb_handleprogress(self:getcurrentbytecount());
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
143 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
144 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
145 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
146 function xml_handlers:EndCdataSection()
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
147 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
148 if stanza then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
149 stanza_size = stanza_size + self:getcurrentbytecount();
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
150 else
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
151 cb_handleprogress(self:getcurrentbytecount());
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
152 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
153 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
154 end
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
155 function xml_handlers:CharacterData(data)
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
156 if stanza then
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
157 if lxp_supports_bytecount then
6052
ce3244c084f9 util.xmppstream: Disable LuaExpat's buffering (if possible)
Matthew Wild <mwild1@gmail.com>
parents: 6042
diff changeset
158 stanza_size = stanza_size + self:getcurrentbytecount();
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
159 end
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
160 t_insert(chardata, data);
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
161 elseif lxp_supports_bytecount then
6052
ce3244c084f9 util.xmppstream: Disable LuaExpat's buffering (if possible)
Matthew Wild <mwild1@gmail.com>
parents: 6042
diff changeset
162 cb_handleprogress(self:getcurrentbytecount());
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
163 end
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
164 end
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
165 function xml_handlers:EndElement(tagname)
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
166 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
167 stanza_size = stanza_size + self:getcurrentbytecount()
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
168 end
3633
4069c37c54bc util.xmppstream: Preserve the stream content namespace on descendents of elements which are in another namespace.
Waqas Hussain <waqas20@gmail.com>
parents: 3540
diff changeset
169 if non_streamns_depth > 0 then
4069c37c54bc util.xmppstream: Preserve the stream content namespace on descendents of elements which are in another namespace.
Waqas Hussain <waqas20@gmail.com>
parents: 3540
diff changeset
170 non_streamns_depth = non_streamns_depth - 1;
4069c37c54bc util.xmppstream: Preserve the stream content namespace on descendents of elements which are in another namespace.
Waqas Hussain <waqas20@gmail.com>
parents: 3540
diff changeset
171 end
2493
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
172 if stanza then
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
173 if #chardata > 0 then
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
174 -- We have some character data in the buffer
3987
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
175 t_insert(stanza, t_concat(chardata));
2493
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
176 chardata = {};
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
177 end
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
178 -- Complete stanza
3987
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
179 if #stack == 0 then
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
180 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
181 cb_handleprogress(stanza_size);
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
182 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
183 stanza_size = 0;
10093
1266a63ba567 util.xmppstream: Inherit xml:lang from stream to stanzas (fixes #1401)
Kim Alvefur <zash@zash.se>
parents: 9071
diff changeset
184 if stanza.attr["xml:lang"] == nil then
1266a63ba567 util.xmppstream: Inherit xml:lang from stream to stanzas (fixes #1401)
Kim Alvefur <zash@zash.se>
parents: 9071
diff changeset
185 stanza.attr["xml:lang"] = stream_lang;
1266a63ba567 util.xmppstream: Inherit xml:lang from stream to stanzas (fixes #1401)
Kim Alvefur <zash@zash.se>
parents: 9071
diff changeset
186 end
2493
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
187 if tagname ~= stream_error_tag then
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
188 cb_handlestanza(session, stanza);
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
189 else
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
190 cb_error(session, "stream-error", stanza);
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
191 end
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
192 stanza = nil;
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
193 else
3987
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
194 stanza = t_remove(stack);
2493
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
195 end
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
196 else
4483
1dbd06eedaa4 util.xmppstream: Have faith in the XML parser matching start and end tags.
Waqas Hussain <waqas20@gmail.com>
parents: 4482
diff changeset
197 if cb_streamclosed then
1dbd06eedaa4 util.xmppstream: Have faith in the XML parser matching start and end tags.
Waqas Hussain <waqas20@gmail.com>
parents: 4482
diff changeset
198 cb_streamclosed(session);
1
b8787e859fd2 Switched to new connection framework, courtesy of the luadch project
matthew
parents:
diff changeset
199 end
b8787e859fd2 Switched to new connection framework, courtesy of the luadch project
matthew
parents:
diff changeset
200 end
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
201 end
4277
683523db4fe8 Merge 0.6->0.7
Matthew Wild <mwild1@gmail.com>
parents: 2925 4276
diff changeset
202
4288
8fde6b6b4919 Merge 0.6->0.7
Matthew Wild <mwild1@gmail.com>
parents: 4281 4287
diff changeset
203 local function restricted_handler(parser)
4275
5305a665bdd4 util.xmppstream: Reject XML comments, processing instructions and (if supported by LuaExpat) DTDs. If not supported, log a warning.
Matthew Wild <mwild1@gmail.com>
parents: 3927
diff changeset
204 cb_error(session, "parse-error", "restricted-xml", "Restricted XML, see RFC 6120 section 11.1.");
4305
e3ffa91517cc util.xmppstream: Check to make sure parser.stop is present before calling it.
Waqas Hussain <waqas20@gmail.com>
parents: 4289
diff changeset
205 if not parser.stop or not parser:stop() then
4288
8fde6b6b4919 Merge 0.6->0.7
Matthew Wild <mwild1@gmail.com>
parents: 4281 4287
diff changeset
206 error("Failed to abort parsing");
4276
a37522bf6b1b xmlhandlers: Reject XML comments, processing instructions and (if supported by LuaExpat) DTDs. If not supported, log a warning. [Backport of 7cc426988bcc in trunk]
Matthew Wild <mwild1@gmail.com>
parents: 2923
diff changeset
207 end
4275
5305a665bdd4 util.xmppstream: Reject XML comments, processing instructions and (if supported by LuaExpat) DTDs. If not supported, log a warning.
Matthew Wild <mwild1@gmail.com>
parents: 3927
diff changeset
208 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5311
diff changeset
209
9020
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
210 if lxp_supports_xmldecl then
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
211 function xml_handlers:XmlDecl(version, encoding, standalone)
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
212 if lxp_supports_bytecount then
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
213 cb_handleprogress(self:getcurrentbytecount());
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
214 end
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
215 if (encoding and encoding:lower() ~= "utf-8")
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
216 or (standalone == "no")
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
217 or (version and version ~= "1.0") then
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
218 return restricted_handler(self);
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
219 end
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
220 end
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
221 end
4275
5305a665bdd4 util.xmppstream: Reject XML comments, processing instructions and (if supported by LuaExpat) DTDs. If not supported, log a warning.
Matthew Wild <mwild1@gmail.com>
parents: 3927
diff changeset
222 if lxp_supports_doctype then
5305a665bdd4 util.xmppstream: Reject XML comments, processing instructions and (if supported by LuaExpat) DTDs. If not supported, log a warning.
Matthew Wild <mwild1@gmail.com>
parents: 3927
diff changeset
223 xml_handlers.StartDoctypeDecl = restricted_handler;
5305a665bdd4 util.xmppstream: Reject XML comments, processing instructions and (if supported by LuaExpat) DTDs. If not supported, log a warning.
Matthew Wild <mwild1@gmail.com>
parents: 3927
diff changeset
224 end
5305a665bdd4 util.xmppstream: Reject XML comments, processing instructions and (if supported by LuaExpat) DTDs. If not supported, log a warning.
Matthew Wild <mwild1@gmail.com>
parents: 3927
diff changeset
225 xml_handlers.Comment = restricted_handler;
5305a665bdd4 util.xmppstream: Reject XML comments, processing instructions and (if supported by LuaExpat) DTDs. If not supported, log a warning.
Matthew Wild <mwild1@gmail.com>
parents: 3927
diff changeset
226 xml_handlers.ProcessingInstruction = restricted_handler;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5311
diff changeset
227
3032
38459cffaf67 util.xmppstream: Stream objects now just have feed/reset methods
Matthew Wild <mwild1@gmail.com>
parents: 2926
diff changeset
228 local function reset()
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
229 stanza, chardata, stanza_size = nil, {}, 0;
3987
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
230 stack = {};
3032
38459cffaf67 util.xmppstream: Stream objects now just have feed/reset methods
Matthew Wild <mwild1@gmail.com>
parents: 2926
diff changeset
231 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5311
diff changeset
232
8382
e5d00bf4a4d5 util: Various minor changes to please [luacheck]
Kim Alvefur <zash@zash.se>
parents: 7240
diff changeset
233 local function set_session(stream, new_session) -- luacheck: ignore 212/stream
3424
9e0df614e5d0 util.xmppstream: Add set_session() method to change the session that a stream is associated with
Matthew Wild <mwild1@gmail.com>
parents: 3032
diff changeset
234 session = new_session;
9e0df614e5d0 util.xmppstream: Add set_session() method to change the session that a stream is associated with
Matthew Wild <mwild1@gmail.com>
parents: 3032
diff changeset
235 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5311
diff changeset
236
3424
9e0df614e5d0 util.xmppstream: Add set_session() method to change the session that a stream is associated with
Matthew Wild <mwild1@gmail.com>
parents: 3032
diff changeset
237 return xml_handlers, { reset = reset, set_session = set_session };
1
b8787e859fd2 Switched to new connection framework, courtesy of the luadch project
matthew
parents:
diff changeset
238 end
b8787e859fd2 Switched to new connection framework, courtesy of the luadch project
matthew
parents:
diff changeset
239
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
240 local function new(session, stream_callbacks, stanza_size_limit)
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
241 -- Used to track parser progress (e.g. to enforce size limits)
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
242 local n_outstanding_bytes = 0;
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
243 local handle_progress;
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
244 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
245 function handle_progress(n_parsed_bytes)
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
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246 n_outstanding_bytes = n_outstanding_bytes - n_parsed_bytes;
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247 end
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248 stanza_size_limit = stanza_size_limit or default_stanza_size_limit;
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249 elseif stanza_size_limit then
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250 error("Stanza size limits are not supported on this version of LuaExpat")
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251 end
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252
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253 local handlers, meta = new_sax_handlers(session, stream_callbacks, handle_progress);
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254 local parser = new_parser(handlers, ns_separator, false);
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255 local parse = parser.parse;
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256
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257 function session.open_stream(session, from, to) -- luacheck: ignore 432/session
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258 local send = session.sends2s or session.send;
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259
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260 local attr = {
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261 ["xmlns:stream"] = "http://etherx.jabber.org/streams",
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262 ["xml:lang"] = "en",
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263 xmlns = stream_callbacks.default_ns,
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264 version = session.version and (session.version > 0 and "1.0" or nil),
6355
c2d144d3f8dd util.xmppstream: Don't include empty stream ID in stream header (got here from mod_c2s)
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parents: 6084
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265 id = session.streamid,
6063
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266 from = from or session.host, to = to,
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267 };
6084
3c02a9ed399e util.xmppstream: Check for callback that may add stream header attributes
Kim Alvefur <zash@zash.se>
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268 if session.stream_attrs then
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269 session:stream_attrs(from, to, attr)
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270 end
6063
e626ee2fe106 mod_c2s, mod_s2s, mod_component, util.xmppstream: Move all session:open_stream() functions to util.xmppstream
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parents: 6054
diff changeset
271 send("<?xml version='1.0'?>");
e626ee2fe106 mod_c2s, mod_s2s, mod_component, util.xmppstream: Move all session:open_stream() functions to util.xmppstream
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272 send(st.stanza("stream:stream", attr):top_tag());
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273 return true;
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274 end
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275
3032
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276 return {
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diff changeset
277 reset = function ()
6053
2f93a04564b2 util.xmppstream: Also disable CharacterData merging after stream restarts
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parents: 6052
diff changeset
278 parser = new_parser(handlers, ns_separator, false);
3032
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parents: 2926
diff changeset
279 parse = parser.parse;
6042
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diff changeset
280 n_outstanding_bytes = 0;
3032
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diff changeset
281 meta.reset();
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diff changeset
282 end,
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diff changeset
283 feed = function (self, data) -- luacheck: ignore 212/self
6042
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diff changeset
284 if lxp_supports_bytecount then
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diff changeset
285 n_outstanding_bytes = n_outstanding_bytes + #data;
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
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diff changeset
286 end
9071
db61e33bbd41 util.xmppstream: Explicitly release old parser object on stream reset
Matthew Wild <mwild1@gmail.com>
parents: 9020
diff changeset
287 local _parser = parser;
db61e33bbd41 util.xmppstream: Explicitly release old parser object on stream reset
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288 local ok, err = parse(_parser, data);
6042
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parents: 5311
diff changeset
289 if lxp_supports_bytecount and n_outstanding_bytes > stanza_size_limit then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
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diff changeset
290 return nil, "stanza-too-large";
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
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diff changeset
291 end
9071
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parents: 9020
diff changeset
292 if parser ~= _parser then
db61e33bbd41 util.xmppstream: Explicitly release old parser object on stream reset
Matthew Wild <mwild1@gmail.com>
parents: 9020
diff changeset
293 _parser:parse();
db61e33bbd41 util.xmppstream: Explicitly release old parser object on stream reset
Matthew Wild <mwild1@gmail.com>
parents: 9020
diff changeset
294 _parser:close();
db61e33bbd41 util.xmppstream: Explicitly release old parser object on stream reset
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diff changeset
295 end
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
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diff changeset
296 return ok, err;
3424
9e0df614e5d0 util.xmppstream: Add set_session() method to change the session that a stream is associated with
Matthew Wild <mwild1@gmail.com>
parents: 3032
diff changeset
297 end,
9e0df614e5d0 util.xmppstream: Add set_session() method to change the session that a stream is associated with
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diff changeset
298 set_session = meta.set_session;
3032
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diff changeset
299 };
2921
f0ddfd7739ea util.xmppstream: new() now returns a parser object
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parents: 2920
diff changeset
300 end
f0ddfd7739ea util.xmppstream: new() now returns a parser object
Matthew Wild <mwild1@gmail.com>
parents: 2920
diff changeset
301
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
302 return {
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
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parents: 6367
diff changeset
303 ns_separator = ns_separator;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
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parents: 6367
diff changeset
304 ns_pattern = ns_pattern;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
305 new_sax_handlers = new_sax_handlers;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6367
diff changeset
306 new = new;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
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parents: 6367
diff changeset
307 };