prosody
59557bc3c4b8
util/xmppstream.lua

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util/xmppstream.lua @ 12084:59557bc3c4b8 0.11

net.server_epoll: Process all queued events from epoll before timers Should call timers less frequently when many sockets are waiting for processing. May help under heavy load. Requested by Ge0rG Backport of 2bcd84123eba requested by Roi
author Kim Alvefur <zash@zash.se>
date Thu, 21 Oct 2021 15:59:16 +0200
parent 11547:dd21eb632f52
child 11560:3bbb1af92514
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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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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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12
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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*1; -- 1MB
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26
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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 stack = {};
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68 local chardata, stanza = {};
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69 local stanza_size = 0;
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70 local non_streamns_depth = 0;
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71 function xml_handlers:StartElement(tagname, attr)
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72 if stanza and #chardata > 0 then
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73 -- We have some character data in the buffer
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74 t_insert(stanza, t_concat(chardata));
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75 chardata = {};
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76 end
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77 local curr_ns,name = tagname:match(ns_pattern);
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78 if name == "" then
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79 curr_ns, name = "", curr_ns;
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80 end
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81
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82 if curr_ns ~= stream_default_ns or non_streamns_depth > 0 then
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83 attr.xmlns = curr_ns;
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84 non_streamns_depth = non_streamns_depth + 1;
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85 end
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86
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87 for i=1,#attr do
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88 local k = attr[i];
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89 attr[i] = nil;
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90 local xmlk = xml_namespace[k];
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91 if xmlk then
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92 attr[xmlk] = attr[k];
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93 attr[k] = nil;
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94 end
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95 end
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96
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97 if not stanza then --if we are not currently inside a stanza
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98 if lxp_supports_bytecount then
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99 stanza_size = self:getcurrentbytecount();
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100 end
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101 if session.notopen then
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102 if tagname == stream_tag then
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103 non_streamns_depth = 0;
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104 if cb_streamopened then
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105 if lxp_supports_bytecount then
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106 cb_handleprogress(stanza_size);
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107 stanza_size = 0;
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108 end
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109 cb_streamopened(session, attr);
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110 end
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111 else
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112 -- Garbage before stream?
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113 cb_error(session, "no-stream", tagname);
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114 end
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115 return;
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116 end
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117 if curr_ns == "jabber:client" and name ~= "iq" and name ~= "presence" and name ~= "message" then
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118 cb_error(session, "invalid-top-level-element");
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119 end
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120
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121 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
122 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
123 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
124 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
125 end
3987
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
126 t_insert(stack, stanza);
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
127 local oldstanza = stanza;
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
128 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
129 t_insert(oldstanza, stanza);
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
130 t_insert(oldstanza.tags, stanza);
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
131 end
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
132 end
9020
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
133
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
134 function xml_handlers:StartCdataSection()
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
135 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
136 if stanza then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
137 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
138 else
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
139 cb_handleprogress(self:getcurrentbytecount());
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
140 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
141 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
142 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
143 function xml_handlers:EndCdataSection()
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
144 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
145 if stanza then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
146 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
147 else
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
148 cb_handleprogress(self:getcurrentbytecount());
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
149 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
150 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
151 end
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
152 function xml_handlers:CharacterData(data)
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
153 if stanza then
6042
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Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
154 if lxp_supports_bytecount then
6052
ce3244c084f9 util.xmppstream: Disable LuaExpat's buffering (if possible)
Matthew Wild <mwild1@gmail.com>
parents: 6042
diff changeset
155 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
156 end
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
157 t_insert(chardata, data);
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
158 elseif lxp_supports_bytecount then
6052
ce3244c084f9 util.xmppstream: Disable LuaExpat's buffering (if possible)
Matthew Wild <mwild1@gmail.com>
parents: 6042
diff changeset
159 cb_handleprogress(self:getcurrentbytecount());
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
160 end
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
161 end
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
162 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
163 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
164 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
165 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
166 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
167 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
168 end
2493
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
169 if stanza then
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
170 if #chardata > 0 then
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
171 -- 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
172 t_insert(stanza, t_concat(chardata));
2493
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
173 chardata = {};
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
174 end
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
175 -- Complete stanza
3987
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
176 if #stack == 0 then
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
177 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
178 cb_handleprogress(stanza_size);
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
179 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
180 stanza_size = 0;
2493
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
181 if tagname ~= stream_error_tag then
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
182 cb_handlestanza(session, stanza);
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
183 else
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
184 cb_error(session, "stream-error", stanza);
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
185 end
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
186 stanza = nil;
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
187 else
3987
8fbf57722368 util.xmppstream: Optimized stanza building by bypassing the stanza API.
Waqas Hussain <waqas20@gmail.com>
parents: 3927
diff changeset
188 stanza = t_remove(stack);
2493
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
189 end
ec09d16a51e1 xmlhandlers: Rearranged a little code.
Waqas Hussain <waqas20@gmail.com>
parents: 2492
diff changeset
190 else
11546
b21d8c286973 util.xmppstream: Mark bytes for stream closure as handled
Matthew Wild <mwild1@gmail.com>
parents: 11543
diff changeset
191 if lxp_supports_bytecount then
b21d8c286973 util.xmppstream: Mark bytes for stream closure as handled
Matthew Wild <mwild1@gmail.com>
parents: 11543
diff changeset
192 cb_handleprogress(stanza_size);
b21d8c286973 util.xmppstream: Mark bytes for stream closure as handled
Matthew Wild <mwild1@gmail.com>
parents: 11543
diff changeset
193 end
4483
1dbd06eedaa4 util.xmppstream: Have faith in the XML parser matching start and end tags.
Waqas Hussain <waqas20@gmail.com>
parents: 4482
diff changeset
194 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
195 cb_streamclosed(session);
1
b8787e859fd2 Switched to new connection framework, courtesy of the luadch project
matthew
parents:
diff changeset
196 end
b8787e859fd2 Switched to new connection framework, courtesy of the luadch project
matthew
parents:
diff changeset
197 end
2492
b5e2d1919ec3 xmlhandlers: Fixed indentation and added some semicolons.
Waqas Hussain <waqas20@gmail.com>
parents: 2468
diff changeset
198 end
4277
683523db4fe8 Merge 0.6->0.7
Matthew Wild <mwild1@gmail.com>
parents: 2925 4276
diff changeset
199
4288
8fde6b6b4919 Merge 0.6->0.7
Matthew Wild <mwild1@gmail.com>
parents: 4281 4287
diff changeset
200 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
201 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
202 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
203 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
204 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
205 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5311
diff changeset
206
9020
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
207 if lxp_supports_xmldecl then
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
208 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
209 if lxp_supports_bytecount then
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
210 cb_handleprogress(self:getcurrentbytecount());
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
211 end
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
212 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
213 or (standalone == "no")
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
214 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
215 return restricted_handler(self);
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
216 end
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
217 end
19e51d8f8947 util.xmppstream: Perfom validation of XML declaration parameters
Matthew Wild <mwild1@gmail.com>
parents: 8555
diff changeset
218 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
219 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
220 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
221 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
222 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
223 xml_handlers.ProcessingInstruction = restricted_handler;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5311
diff changeset
224
3032
38459cffaf67 util.xmppstream: Stream objects now just have feed/reset methods
Matthew Wild <mwild1@gmail.com>
parents: 2926
diff changeset
225 local function reset()
6042
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
226 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
227 stack = {};
3032
38459cffaf67 util.xmppstream: Stream objects now just have feed/reset methods
Matthew Wild <mwild1@gmail.com>
parents: 2926
diff changeset
228 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5311
diff changeset
229
8382
e5d00bf4a4d5 util: Various minor changes to please [luacheck]
Kim Alvefur <zash@zash.se>
parents: 7240
diff changeset
230 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
231 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
232 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5311
diff changeset
233
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 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
235 end
b8787e859fd2 Switched to new connection framework, courtesy of the luadch project
matthew
parents:
diff changeset
236
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
237 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
238 -- 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
239 local n_outstanding_bytes = 0;
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
240 local handle_progress;
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
241 if lxp_supports_bytecount then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
242 function handle_progress(n_parsed_bytes)
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
243 n_outstanding_bytes = n_outstanding_bytes - n_parsed_bytes;
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
244 end
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
245 stanza_size_limit = stanza_size_limit or default_stanza_size_limit;
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
246 elseif stanza_size_limit then
1107d66d2ab2 util.xmppstream: Implement stanza size limiting, default limit 10MB
Matthew Wild <mwild1@gmail.com>
parents: 5311
diff changeset
247 error("Stanza size limits are not supported on this version of LuaExpat")
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248 end
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249
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250 local handlers, meta = new_sax_handlers(session, stream_callbacks, handle_progress);
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251 local parser = new_parser(handlers, ns_separator, false);
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252 local parse = parser.parse;
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253
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254 function session.open_stream(session, from, to) -- luacheck: ignore 432/session
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255 local send = session.sends2s or session.send;
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256
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257 local attr = {
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258 ["xmlns:stream"] = "http://etherx.jabber.org/streams",
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259 ["xml:lang"] = "en",
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260 xmlns = stream_callbacks.default_ns,
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261 version = session.version and (session.version > 0 and "1.0" or nil),
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c2d144d3f8dd util.xmppstream: Don't include empty stream ID in stream header (got here from mod_c2s)
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262 id = session.streamid,
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263 from = from or session.host, to = to,
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264 };
6084
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265 if session.stream_attrs then
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266 session:stream_attrs(from, to, attr)
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267 end
6063
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268 send("<?xml version='1.0'?>");
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269 send(st.stanza("stream:stream", attr):top_tag());
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270 return true;
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271 end
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272
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273 return {
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274 reset = function ()
6053
2f93a04564b2 util.xmppstream: Also disable CharacterData merging after stream restarts
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diff changeset
275 parser = new_parser(handlers, ns_separator, false);
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276 parse = parser.parse;
6042
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277 n_outstanding_bytes = 0;
3032
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278 meta.reset();
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279 end,
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280 feed = function (self, data) -- luacheck: ignore 212/self
6042
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281 if lxp_supports_bytecount then
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282 n_outstanding_bytes = n_outstanding_bytes + #data;
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283 end
9071
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284 local _parser = parser;
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285 local ok, err = parse(_parser, data);
6042
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286 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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287 return nil, "stanza-too-large";
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288 end
9071
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289 if parser ~= _parser then
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290 _parser:parse();
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291 _parser:close();
db61e33bbd41 util.xmppstream: Explicitly release old parser object on stream reset
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292 end
6042
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293 return ok, err;
3424
9e0df614e5d0 util.xmppstream: Add set_session() method to change the session that a stream is associated with
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parents: 3032
diff changeset
294 end,
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295 set_session = meta.set_session;
11547
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296 set_stanza_size_limit = function (_, new_stanza_size_limit)
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297 stanza_size_limit = new_stanza_size_limit;
dd21eb632f52 util.xmppstream: Allow dynamically configuring the stanza size limit for a stream
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298 end;
3032
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299 };
2921
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300 end
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301
6777
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
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;
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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
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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
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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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diff changeset
307 };