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annotate mod_websocket/mod_websocket.lua @ 1397:4e36b68d68da

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mod_websocket: Handle pong messages
author Florian Zeitz <florob@babelmonkeys.de>
date Mon, 28 Apr 2014 23:23:45 +0200
parents cc77341af5ee
children
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1 -- Prosody IM
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2 -- Copyright (C) 2012 Florian Zeitz
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3 --
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4 -- This project is MIT/X11 licensed. Please see the
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5 -- COPYING file in the source package for more information.
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6 --
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7
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8 module:set_global();
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9
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10 local add_filter = require "util.filters".add_filter;
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11 local sha1 = require "util.hashes".sha1;
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12 local base64 = require "util.encodings".base64.encode;
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13 local softreq = require "util.dependencies".softreq;
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14 local st = require "util.stanza";
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15 local parse_xml = require "util.xml".parse;
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16 local portmanager = require "core.portmanager";
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17 local sm_destroy_session = sessionmanager.destroy_session;
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18 local log = module._log;
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19
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20 local bit;
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21 pcall(function() bit = require"bit"; end);
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22 bit = bit or softreq"bit32"
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23 if not bit then module:log("error", "No bit module found. Either LuaJIT 2, lua-bitop or Lua 5.2 is required"); end
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24 local band = bit.band;
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25 local bxor = bit.bxor;
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26 local rshift = bit.rshift;
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27
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28 local t_concat = table.concat;
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29 local s_byte = string.byte;
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30 local s_char= string.char;
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31
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32 local consider_websocket_secure = module:get_option_boolean("consider_websocket_secure");
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33 local cross_domain = module:get_option("cross_domain_websocket");
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34 if cross_domain then
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35 if cross_domain == true then
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36 cross_domain = "*";
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37 elseif type(cross_domain) == "table" then
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38 cross_domain = t_concat(cross_domain, ", ");
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39 end
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40 if type(cross_domain) ~= "string" then
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41 cross_domain = nil;
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42 end
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43 end
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44
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45 local xmlns_framing = "urn:ietf:params:xml:ns:xmpp-framing";
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46 local xmlns_streams = "http://etherx.jabber.org/streams";
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47 local xmlns_client = "jabber:client";
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48 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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50 module:depends("c2s")
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51 local sessions = module:shared("c2s/sessions");
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52 local c2s_listener = portmanager.get_service("c2s").listener;
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53
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54 -- Websocket helpers
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55 local function parse_frame(frame)
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56 local result = {};
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57 local pos = 1;
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58 local length_bytes = 0;
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59 local tmp_byte;
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60
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61 if #frame < 2 then return; end
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62
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63 tmp_byte = s_byte(frame, pos);
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64 result.FIN = band(tmp_byte, 0x80) > 0;
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65 result.RSV1 = band(tmp_byte, 0x40) > 0;
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66 result.RSV2 = band(tmp_byte, 0x20) > 0;
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67 result.RSV3 = band(tmp_byte, 0x10) > 0;
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68 result.opcode = band(tmp_byte, 0x0F);
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69
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70 pos = pos + 1;
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71 tmp_byte = s_byte(frame, pos);
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72 result.MASK = band(tmp_byte, 0x80) > 0;
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73 result.length = band(tmp_byte, 0x7F);
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74
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75 if result.length == 126 then
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76 length_bytes = 2;
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77 result.length = 0;
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78 elseif result.length == 127 then
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79 length_bytes = 8;
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80 result.length = 0;
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81 end
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82
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83 if #frame < (2 + length_bytes) then return; end
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84
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85 for i = 1, length_bytes do
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86 pos = pos + 1;
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87 result.length = result.length * 256 + s_byte(frame, pos);
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88 end
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89
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90 if #frame < (2 + length_bytes + (result.MASK and 4 or 0) + result.length) then return; end
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91
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92 if result.MASK then
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93 local counter = 0;
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94 local data = {};
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95 local key = {s_byte(frame, pos+1), s_byte(frame, pos+2),
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96 s_byte(frame, pos+3), s_byte(frame, pos+4)}
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97 result.key = key;
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98
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99 pos = pos + 5;
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100 for i = pos, pos + result.length - 1 do
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101 data[#data+1] = s_char(bxor(key[counter+1], s_byte(frame, i)));
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102 counter = (counter + 1) % 4;
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103 end
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104 result.data = t_concat(data, "");
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105 else
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106 result.data = frame:sub(pos + 1, pos + result.length);
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107 end
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108
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109 return result, 2 + length_bytes + (result.MASK and 4 or 0) + result.length;
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110 end
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111
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112 local function build_frame(desc)
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113 local length;
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114 local result = {};
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115 local data = desc.data or "";
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116
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117 result[#result+1] = s_char(0x80 * (desc.FIN and 1 or 0) + desc.opcode);
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118
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119 length = #data;
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120 if length <= 125 then -- 7-bit length
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121 result[#result+1] = s_char(length);
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122 elseif length <= 0xFFFF then -- 2-byte length
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123 result[#result+1] = s_char(126);
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124 result[#result+1] = s_char(rshift(length, 8)) .. s_char(length%0x100);
687
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125 else -- 8-byte length
1027
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diff changeset
126 result[#result+1] = s_char(127);
1025
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127 local length_bytes = {};
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diff changeset
128 for i = 8, 1, -1 do
1026
e254cf49e14d mod_websocket: Call string and table functions through locals
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129 length_bytes[i] = s_char(length % 0x100);
1025
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130 length = rshift(length, 8);
687
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131 end
1027
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132 result[#result+1] = t_concat(length_bytes, "");
687
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133 end
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134
1027
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135 result[#result+1] = data;
687
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136
1027
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137 return t_concat(result, "");
687
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138 end
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139
1340
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140 --- Session methods
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141 local function session_open_stream(session)
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142 local attr = {
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143 xmlns = xmlns_framing,
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144 version = "1.0",
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145 id = session.streamid or "",
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146 from = session.host
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147 };
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148 session.send(st.stanza("open", attr));
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149 end
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150
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151 local function session_close(session, reason)
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152 local log = session.log or log;
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153 if session.conn then
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diff changeset
154 if session.notopen then
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155 session:open_stream();
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156 end
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157 if reason then -- nil == no err, initiated by us, false == initiated by client
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diff changeset
158 local stream_error = st.stanza("stream:error");
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diff changeset
159 if type(reason) == "string" then -- assume stream error
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diff changeset
160 stream_error:tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' });
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diff changeset
161 elseif type(reason) == "table" then
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diff changeset
162 if reason.condition then
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parents: 1325
diff changeset
163 stream_error:tag(reason.condition, stream_xmlns_attr):up();
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parents: 1325
diff changeset
164 if reason.text then
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165 stream_error:tag("text", stream_xmlns_attr):text(reason.text):up();
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diff changeset
166 end
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diff changeset
167 if reason.extra then
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diff changeset
168 stream_error:add_child(reason.extra);
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diff changeset
169 end
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diff changeset
170 elseif reason.name then -- a stanza
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diff changeset
171 stream_error = reason;
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diff changeset
172 end
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diff changeset
173 end
1364
cc77341af5ee mod_websocket: Multiple fixes for sending stream errors
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diff changeset
174 log("debug", "Disconnecting client, <stream:error> is: %s", tostring(stream_error));
1340
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diff changeset
175 session.send(stream_error);
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diff changeset
176 end
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diff changeset
177
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diff changeset
178 session.send(st.stanza("close", { xmlns = xmlns_framing }));
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diff changeset
179 function session.send() return false; end
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diff changeset
180
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181 local reason = (reason and (reason.name or reason.text or reason.condition)) or reason;
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diff changeset
182 session.log("debug", "c2s stream for %s closed: %s", session.full_jid or ("<"..session.ip..">"), reason or "session closed");
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diff changeset
183
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184 -- Authenticated incoming stream may still be sending us stanzas, so wait for </stream:stream> from remote
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185 local conn = session.conn;
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diff changeset
186 if reason == nil and not session.notopen and session.type == "c2s" then
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187 -- Grace time to process data from authenticated cleanly-closed stream
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diff changeset
188 add_task(stream_close_timeout, function ()
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diff changeset
189 if not session.destroyed then
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diff changeset
190 session.log("warn", "Failed to receive a stream close response, closing connection anyway...");
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diff changeset
191 sm_destroy_session(session, reason);
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diff changeset
192 -- Sends close with code 1000 and message "Stream closed"
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diff changeset
193 local data = s_char(0x03) .. s_char(0xe8) .. "Stream closed";
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diff changeset
194 conn:write(build_frame({opcode = 0x8, FIN = true, data = data}));
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parents: 1325
diff changeset
195 conn:close();
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diff changeset
196 end
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diff changeset
197 end);
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diff changeset
198 else
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diff changeset
199 sm_destroy_session(session, reason);
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diff changeset
200 -- Sends close with code 1000 and message "Stream closed"
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parents: 1325
diff changeset
201 local data = s_char(0x03) .. s_char(0xe8) .. "Stream closed";
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diff changeset
202 conn:write(build_frame({opcode = 0x8, FIN = true, data = data}));
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parents: 1325
diff changeset
203 conn:close();
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diff changeset
204 end
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Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
205 end
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parents: 1325
diff changeset
206 end
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parents: 1325
diff changeset
207
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diff changeset
208
895
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diff changeset
209 --- Filter stuff
1340
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parents: 1325
diff changeset
210 local function filter_open_close(data)
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parents: 1325
diff changeset
211 if not data:find(xmlns_framing, 1, true) then return data; end
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
212
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
213 local oc = parse_xml(data);
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
214 if not oc then return data; end
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Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
215 if oc.attr.xmlns ~= xmlns_framing then return data; end
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Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
216 if oc.name == "close" then return "</stream:stream>"; end
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
217 if oc.name == "open" then
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
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parents: 1325
diff changeset
218 oc.name = "stream:stream";
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parents: 1325
diff changeset
219 oc.attr.xmlns = nil;
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
220 oc.attr["xmlns:stream"] = xmlns_streams;
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Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
221 return oc:top_tag();
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Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
222 end
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Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
223
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Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
224 return data;
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parents: 1325
diff changeset
225 end
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
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parents: 857
diff changeset
226 function handle_request(event, path)
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Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
227 local request, response = event.request, event.response;
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parents: 857
diff changeset
228 local conn = response.conn;
676
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
229
895
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parents: 857
diff changeset
230 if not request.headers.sec_websocket_key then
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
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parents: 857
diff changeset
231 response.headers.content_type = "text/html";
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parents: 857
diff changeset
232 return [[<!DOCTYPE html><html><head><title>Websocket</title></head><body>
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Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
233 <p>It works! Now point your WebSocket client to this URL to connect to Prosody.</p>
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parents: 857
diff changeset
234 </body></html>]];
676
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
235 end
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
236
895
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parents: 857
diff changeset
237 local wants_xmpp = false;
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
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parents: 857
diff changeset
238 (request.headers.sec_websocket_protocol or ""):gsub("([^,]*),?", function (proto)
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Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
239 if proto == "xmpp" then wants_xmpp = true; end
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
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parents: 857
diff changeset
240 end);
129
5fc00a3e47b5 mod_websocket: Initial commit
Ali Sabil <ali.sabil@gmail.com>
parents:
diff changeset
241
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
242 if not wants_xmpp then
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
243 return 501;
129
5fc00a3e47b5 mod_websocket: Initial commit
Ali Sabil <ali.sabil@gmail.com>
parents:
diff changeset
244 end
5fc00a3e47b5 mod_websocket: Initial commit
Ali Sabil <ali.sabil@gmail.com>
parents:
diff changeset
245
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
246 local function websocket_close(code, message)
1026
e254cf49e14d mod_websocket: Call string and table functions through locals
Florian Zeitz <florob@babelmonkeys.de>
parents: 1025
diff changeset
247 local data = s_char(rshift(code, 8)) .. s_char(code%0x100) .. message;
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
248 conn:write(build_frame({opcode = 0x8, FIN = true, data = data}));
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
249 conn:close();
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
250 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
251
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
252 local dataBuffer;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
253 local function handle_frame(frame)
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
254 local opcode = frame.opcode;
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
255 local length = frame.length;
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
256 module:log("debug", "Websocket received: %s (%i bytes)", frame.data, #frame.data);
32df4d13f178 mod_websocket: More robust frame handling
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parents: 840
diff changeset
257
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
258 -- Error cases
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
259 if frame.RSV1 or frame.RSV2 or frame.RSV3 then -- Reserved bits non zero
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
260 websocket_close(1002, "Reserved bits not zero");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
261 return false;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
262 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
263
1029
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
264 if opcode == 0x8 then
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
265 if length == 1 then
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
266 websocket_close(1002, "Close frame with payload, but too short for status code");
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
267 return false;
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
268 elseif length >= 2 then
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
269 local status_code = s_byte(frame.data, 1) * 256 + s_byte(frame.data, 2)
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
270 if status_code < 1000 then
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
271 websocket_close(1002, "Closed with invalid status code");
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
272 return false;
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
273 elseif ((status_code > 1003 and status_code < 1007) or status_code > 1011) and status_code < 3000 then
1272
717a08403b26 mod_websocket: Fix typo "Cosed" -> "Closed"
Florian Zeitz <florob@babelmonkeys.de>
parents: 1193
diff changeset
274 websocket_close(1002, "Closed with reserved status code");
1029
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
275 return false;
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
276 end
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
277 end
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
278 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
279
1029
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
280 if opcode >= 0x8 then
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
281 if length > 125 then -- Control frame with too much payload
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
282 websocket_close(1002, "Payload too large");
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
283 return false;
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
284 end
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
285
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
286 if not frame.FIN then -- Fragmented control frame
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
287 websocket_close(1002, "Fragmented control frame");
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
288 return false;
9d85aded2fb6 mod_websocket: Add some more error checks for close frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 1028
diff changeset
289 end
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
290 end
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
291
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
292 if (opcode > 0x2 and opcode < 0x8) or (opcode > 0xA) then
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
293 websocket_close(1002, "Reserved opcode");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
294 return false;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
295 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
296
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
297 if opcode == 0x0 and not dataBuffer then
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
298 websocket_close(1002, "Unexpected continuation frame");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
299 return false;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
300 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
301
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
302 if (opcode == 0x1 or opcode == 0x2) and dataBuffer then
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
303 websocket_close(1002, "Continuation frame expected");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
304 return false;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
305 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
306
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
307 -- Valid cases
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
308 if opcode == 0x0 then -- Continuation frame
1027
6a2dfa8af421 mod_websocket: Optimize string concatenation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1026
diff changeset
309 dataBuffer[#dataBuffer+1] = frame.data;
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
310 elseif opcode == 0x1 then -- Text frame
1027
6a2dfa8af421 mod_websocket: Optimize string concatenation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1026
diff changeset
311 dataBuffer = {frame.data};
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
312 elseif opcode == 0x2 then -- Binary frame
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
313 websocket_close(1003, "Only text frames are supported");
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
314 return;
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
315 elseif opcode == 0x8 then -- Close request
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
316 websocket_close(1000, "Goodbye");
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
317 return;
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
318 elseif opcode == 0x9 then -- Ping frame
691
04662cc35280 mod_websocket: Answer ping frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 690
diff changeset
319 frame.opcode = 0xA;
04662cc35280 mod_websocket: Answer ping frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 690
diff changeset
320 conn:write(build_frame(frame));
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
321 return "";
1397
4e36b68d68da mod_websocket: Handle pong messages
Florian Zeitz <florob@babelmonkeys.de>
parents: 1364
diff changeset
322 elseif opcode == 0xA then -- Pong frame
4e36b68d68da mod_websocket: Handle pong messages
Florian Zeitz <florob@babelmonkeys.de>
parents: 1364
diff changeset
323 module:log("warn", "Received unexpected pong frame: " .. tostring(frame.data));
4e36b68d68da mod_websocket: Handle pong messages
Florian Zeitz <florob@babelmonkeys.de>
parents: 1364
diff changeset
324 return "";
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
325 else
1028
81065638299d mod_websocket: Access some values via locales instead of through tables
Florian Zeitz <florob@babelmonkeys.de>
parents: 1027
diff changeset
326 log("warn", "Received frame with unsupported opcode %i", opcode);
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
327 return "";
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
328 end
676
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
329
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
330 if frame.FIN then
1027
6a2dfa8af421 mod_websocket: Optimize string concatenation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1026
diff changeset
331 local data = t_concat(dataBuffer, "");
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
332 dataBuffer = nil;
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
333 return data;
676
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
334 end
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
335 return "";
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
336 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
337
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
338 conn:setlistener(c2s_listener);
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
339 c2s_listener.onconnect(conn);
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
340
1193
bbe278a56b0a mod_websocket: Add consider_websocket_secure option
Florian Zeitz <florob@babelmonkeys.de>
parents: 1029
diff changeset
341 local session = sessions[conn];
bbe278a56b0a mod_websocket: Add consider_websocket_secure option
Florian Zeitz <florob@babelmonkeys.de>
parents: 1029
diff changeset
342
bbe278a56b0a mod_websocket: Add consider_websocket_secure option
Florian Zeitz <florob@babelmonkeys.de>
parents: 1029
diff changeset
343 session.secure = consider_websocket_secure or session.secure;
bbe278a56b0a mod_websocket: Add consider_websocket_secure option
Florian Zeitz <florob@babelmonkeys.de>
parents: 1029
diff changeset
344
1340
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
345 session.open_stream = session_open_stream;
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
346 session.close = session_close;
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
347
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
348 local frameBuffer = "";
1193
bbe278a56b0a mod_websocket: Add consider_websocket_secure option
Florian Zeitz <florob@babelmonkeys.de>
parents: 1029
diff changeset
349 add_filter(session, "bytes/in", function(data)
1027
6a2dfa8af421 mod_websocket: Optimize string concatenation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1026
diff changeset
350 local cache = {};
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
351 frameBuffer = frameBuffer .. data;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
352 local frame, length = parse_frame(frameBuffer);
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
353
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
354 while frame do
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
355 frameBuffer = frameBuffer:sub(length + 1);
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
356 local result = handle_frame(frame);
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
357 if not result then return; end
1340
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
358 cache[#cache+1] = filter_open_close(result);
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
359 frame, length = parse_frame(frameBuffer);
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
360 end
1027
6a2dfa8af421 mod_websocket: Optimize string concatenation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1026
diff changeset
361 return t_concat(cache, "");
844
a0987c0e4e1d mod_websocket: Check whether the xmpp sub-protocol was requested
Florian Zeitz <florob@babelmonkeys.de>
parents: 842
diff changeset
362 end);
a0987c0e4e1d mod_websocket: Check whether the xmpp sub-protocol was requested
Florian Zeitz <florob@babelmonkeys.de>
parents: 842
diff changeset
363
1193
bbe278a56b0a mod_websocket: Add consider_websocket_secure option
Florian Zeitz <florob@babelmonkeys.de>
parents: 1029
diff changeset
364 add_filter(session, "bytes/out", function(data)
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
365 return build_frame({ FIN = true, opcode = 0x01, data = tostring(data)});
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
Florian Zeitz <florob@babelmonkeys.de>
parents: 857
diff changeset
366 end);
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
367
1340
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
368 add_filter(session, "stanzas/out", function(stanza)
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
369 local attr = stanza.attr;
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
370 attr.xmlns = attr.xmlns or xmlns_client;
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
371 if stanza.name:find("^stream:") then
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
372 attr["xmlns:stream"] = attr["xmlns:stream"] or xmlns_streams;
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
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373 end
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374 return stanza;
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
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375 end);
3ffd64b4ab59 mod_websocket: Update to draft-ietf-xmpp-websocket-01
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
376
969
8eba9d4809d2 mod_websocket: Set status_code instead of status
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diff changeset
377 response.status_code = 101;
895
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
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parents: 857
diff changeset
378 response.headers.upgrade = "websocket";
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parents: 857
diff changeset
379 response.headers.connection = "Upgrade";
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parents: 857
diff changeset
380 response.headers.sec_webSocket_accept = base64(sha1(request.headers.sec_websocket_key .. "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"));
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parents: 857
diff changeset
381 response.headers.sec_webSocket_protocol = "xmpp";
1f4d77104da5 mod_websocket: Simplify by getting the c2s_listener from mod_c2s
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parents: 857
diff changeset
382 response.headers.access_control_allow_origin = cross_domain;
676
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parents: 129
diff changeset
383
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
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parents: 129
diff changeset
384 return "";
129
5fc00a3e47b5 mod_websocket: Initial commit
Ali Sabil <ali.sabil@gmail.com>
parents:
diff changeset
385 end
676
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
386
688
e87678a52720 mod_websocket: Make this a shared module
Florian Zeitz <florob@babelmonkeys.de>
parents: 687
diff changeset
387 function module.add_host(module)
e87678a52720 mod_websocket: Make this a shared module
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diff changeset
388 module:depends("http");
676
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parents: 129
diff changeset
389 module:provides("http", {
909
ec4c6e8f277d mod_websocket: Change the HTTP name to websocket, and override the default_path instead
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parents: 905
diff changeset
390 name = "websocket";
ec4c6e8f277d mod_websocket: Change the HTTP name to websocket, and override the default_path instead
Florian Zeitz <florob@babelmonkeys.de>
parents: 905
diff changeset
391 default_path = "xmpp-websocket";
676
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parents: 129
diff changeset
392 route = {
849
6e2ec1825182 mod_websocket: Accept GET request without trailing /
Florian Zeitz <florob@babelmonkeys.de>
parents: 844
diff changeset
393 ["GET"] = handle_request;
6e2ec1825182 mod_websocket: Accept GET request without trailing /
Florian Zeitz <florob@babelmonkeys.de>
parents: 844
diff changeset
394 ["GET /"] = handle_request;
676
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Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
395 };
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
396 });
129
5fc00a3e47b5 mod_websocket: Initial commit
Ali Sabil <ali.sabil@gmail.com>
parents:
diff changeset
397 end