Mercurial > prosody-modules

annotate mod_websocket/mod_websocket.lua @ 846:5ddc43ce8993

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mod_auth_external: Work even when the LuaProcessCall library isn't available.
author Waqas Hussain <waqas20@gmail.com>
date Sat, 13 Oct 2012 02:33:06 +0500
parents a0987c0e4e1d
children 6e2ec1825182
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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 -- Copyright (C) 2012 Florian Zeitz
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9
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10 module:set_global();
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12 local add_task = require "util.timer".add_task;
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13 local new_xmpp_stream = require "util.xmppstream".new;
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14 local nameprep = require "util.encodings".stringprep.nameprep;
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15 local sessionmanager = require "core.sessionmanager";
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16 local st = require "util.stanza";
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17 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session;
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18 local uuid_generate = require "util.uuid".generate;
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19 local sha1 = require "util.hashes".sha1;
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20 local base64 = require "util.encodings".base64.encode;
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21 local band = require "bit".band;
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22 local bxor = require "bit".bxor;
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23
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24 local xpcall, tostring, type = xpcall, tostring, type;
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25 local traceback = debug.traceback;
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26
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27 local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
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28
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29 local log = module._log;
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30
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31 local c2s_timeout = module:get_option_number("c2s_timeout");
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32 local stream_close_timeout = module:get_option_number("c2s_close_timeout", 5);
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33 local opt_keepalives = module:get_option_boolean("tcp_keepalives", false);
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34 local self_closing_stream = module:get_option_boolean("websocket_self_closing_stream", true);
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35
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36 local sessions = module:shared("sessions");
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37 local core_process_stanza = prosody.core_process_stanza;
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38
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39 local stream_callbacks = { default_ns = "jabber:client", handlestanza = core_process_stanza };
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40 local listener = {};
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41
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42 -- Websocket helpers
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43 local function parse_frame(frame)
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44 local result = {};
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45 local pos = 1;
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46 local length_bytes = 0;
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47 local counter = 0;
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48 local tmp_byte;
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49
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50 if #frame < 2 then return; end
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51
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52 tmp_byte = string.byte(frame, pos);
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53 result.FIN = band(tmp_byte, 0x80) > 0;
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54 result.RSV1 = band(tmp_byte, 0x40) > 0;
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55 result.RSV2 = band(tmp_byte, 0x20) > 0;
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56 result.RSV3 = band(tmp_byte, 0x10) > 0;
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57 result.opcode = band(tmp_byte, 0x0F);
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58
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59 pos = pos + 1;
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60 tmp_byte = string.byte(frame, pos);
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61 result.MASK = band(tmp_byte, 0x80) > 0;
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62 result.length = band(tmp_byte, 0x7F);
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63
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64 if result.length == 126 then
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65 length_bytes = 2;
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66 result.length = 0;
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67 elseif result.length == 127 then
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68 length_bytes = 8;
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69 result.length = 0;
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70 end
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71
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72 if #frame < (2 + length_bytes) then return; end
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73
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74 for i = 1, length_bytes do
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75 pos = pos + 1;
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76 result.length = result.length * 256 + string.byte(frame, pos);
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77 end
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78
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79 if #frame < (2 + length_bytes + (result.MASK and 4 or 0) + result.length) then return; end
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80
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81 if result.MASK then
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82 result.key = {string.byte(frame, pos+1), string.byte(frame, pos+2),
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83 string.byte(frame, pos+3), string.byte(frame, pos+4)}
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84
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85 pos = pos + 5;
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86 result.data = "";
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87 for i = pos, pos + result.length - 1 do
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88 result.data = result.data .. string.char(bxor(result.key[counter+1], string.byte(frame, i)));
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89 counter = (counter + 1) % 4;
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90 end
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91 else
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92 result.data = frame:sub(pos + 1, pos + result.length);
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93 end
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94
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95 return result, 2 + length_bytes + (result.MASK and 4 or 0) + result.length;
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96 end
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97
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98 local function build_frame(desc)
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99 local length;
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100 local result = "";
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101 local data = desc.data or "";
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102
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103 result = result .. string.char(0x80 * (desc.FIN and 1 or 0) + desc.opcode);
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104
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105 length = #data;
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106 if length <= 125 then -- 7-bit length
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107 result = result .. string.char(length);
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108 elseif length <= 0xFFFF then -- 2-byte length
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109 result = result .. string.char(126);
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110 result = result .. string.char(length/0x100) .. string.char(length%0x100);
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111 else -- 8-byte length
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112 result = result .. string.char(127);
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113 for i = 7, 0, -1 do
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114 result = result .. string.char(( length / (2^(8*i)) ) % 0x100);
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115 end
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116 end
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117
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118 result = result .. data;
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119
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120 return result;
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121 end
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122
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123 --- Stream events handlers
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124 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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125 local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
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126
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127 function stream_callbacks.streamopened(session, attr)
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128 local send = session.send;
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129 session.host = nameprep(attr.to);
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130 if not session.host then
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131 session:close{ condition = "improper-addressing",
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132 text = "A valid 'to' attribute is required on stream headers" };
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133 return;
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134 end
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135 session.version = tonumber(attr.version) or 0;
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136 session.streamid = uuid_generate();
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137 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
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138
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139 if not hosts[session.host] then
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140 -- We don't serve this host...
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141 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
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diff changeset
142 return;
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143 end
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144
677
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145 -- COMPAT: Current client implementations need this to be self-closing
692
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146 if self_closing_stream then
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147 send("<?xml version='1.0'?>"..tostring(st.stanza("stream:stream", {
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148 xmlns = 'jabber:client', ["xmlns:stream"] = 'http://etherx.jabber.org/streams';
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149 id = session.streamid, from = session.host, version = '1.0', ["xml:lang"] = 'en' })));
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150 else
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151 send("<?xml version='1.0'?>"..st.stanza("stream:stream", {
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152 xmlns = 'jabber:client', ["xmlns:stream"] = 'http://etherx.jabber.org/streams';
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153 id = session.streamid, from = session.host, version = '1.0', ["xml:lang"] = 'en' }):top_tag());
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154 end
676
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155
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156 (session.log or log)("debug", "Sent reply <stream:stream> to client");
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157 session.notopen = nil;
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158
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159 -- If session.secure is *false* (not nil) then it means we /were/ encrypting
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160 -- since we now have a new stream header, session is secured
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161 if session.secure == false then
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162 session.secure = true;
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163 end
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164
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165 local features = st.stanza("stream:features");
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166 hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
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167 module:fire_event("stream-features", session, features);
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168
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169 send(features);
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170 end
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171
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172 function stream_callbacks.streamclosed(session)
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173 session.log("debug", "Received </stream:stream>");
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174 session:close(false);
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175 end
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176
129
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177 function stream_callbacks.error(session, error, data)
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178 if error == "no-stream" then
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179 session.log("debug", "Invalid opening stream header");
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180 session:close("invalid-namespace");
676
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181 elseif error == "parse-error" then
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182 (session.log or log)("debug", "Client XML parse error: %s", tostring(data));
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183 session:close("not-well-formed");
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184 elseif error == "stream-error" then
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185 local condition, text = "undefined-condition";
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186 for child in data:children() do
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187 if child.attr.xmlns == xmlns_xmpp_streams then
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188 if child.name ~= "text" then
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189 condition = child.name;
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190 else
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191 text = child:get_text();
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192 end
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193 if condition ~= "undefined-condition" and text then
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194 break;
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195 end
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196 end
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197 end
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198 text = condition .. (text and (" ("..text..")") or "");
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199 session.log("info", "Session closed by remote with error: %s", text);
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200 session:close(nil, text);
129
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201 end
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202 end
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203
676
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204 local function handleerr(err) log("error", "Traceback[c2s]: %s: %s", tostring(err), traceback()); end
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205 function stream_callbacks.handlestanza(session, stanza)
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206 stanza = session.filter("stanzas/in", stanza);
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207 if stanza then
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diff changeset
208 return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
129
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209 end
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210 end
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211
676
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212 --- Session methods
129
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213 local function session_close(session, reason)
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214 local log = session.log or log;
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215 if session.conn then
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216 if session.notopen then
692
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217 -- COMPAT: Current client implementations need this to be self-closing
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218 if self_closing_stream then
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219 session.send("<?xml version='1.0'?>"..tostring(st.stanza("stream:stream", default_stream_attr)));
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220 else
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221 session.send("<?xml version='1.0'?>"..st.stanza("stream:stream", default_stream_attr):top_tag());
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222 end
129
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223 end
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224 if reason then -- nil == no err, initiated by us, false == initiated by client
129
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225 if type(reason) == "string" then -- assume stream error
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226 log("debug", "Disconnecting client, <stream:error> is: %s", reason);
129
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227 session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
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228 elseif type(reason) == "table" then
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229 if reason.condition then
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230 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
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231 if reason.text then
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232 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
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233 end
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234 if reason.extra then
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235 stanza:add_child(reason.extra);
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236 end
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237 log("debug", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
129
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238 session.send(stanza);
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239 elseif reason.name then -- a stanza
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240 log("debug", "Disconnecting client, <stream:error> is: %s", tostring(reason));
129
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241 session.send(reason);
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242 end
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parents:
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243 end
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parents:
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244 end
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245 session.send("</stream:stream>");
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246 function session.send() return false; end
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247
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248 local reason = (reason and (reason.text or reason.condition)) or reason;
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249 session.log("info", "c2s stream for %s closed: %s", session.full_jid or ("<"..session.ip..">"), reason or "session closed");
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250
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diff changeset
251 -- Authenticated incoming stream may still be sending us stanzas, so wait for </stream:stream> from remote
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diff changeset
252 local conn = session.conn;
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diff changeset
253 if reason == nil and not session.notopen and session.type == "c2s" then
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diff changeset
254 -- Grace time to process data from authenticated cleanly-closed stream
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diff changeset
255 add_task(stream_close_timeout, function ()
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diff changeset
256 if not session.destroyed then
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diff changeset
257 session.log("warn", "Failed to receive a stream close response, closing connection anyway...");
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diff changeset
258 sm_destroy_session(session, reason);
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diff changeset
259 conn:close();
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diff changeset
260 end
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diff changeset
261 end);
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diff changeset
262 else
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parents: 694
diff changeset
263 sm_destroy_session(session, reason);
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Florian Zeitz <florob@babelmonkeys.de>
parents: 694
diff changeset
264 conn:close();
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parents: 694
diff changeset
265 end
129
5fc00a3e47b5 mod_websocket: Initial commit
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parents:
diff changeset
266 end
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Ali Sabil <ali.sabil@gmail.com>
parents:
diff changeset
267 end
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parents:
diff changeset
268
839
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diff changeset
269 module:hook_global("user-deleted", function(event)
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diff changeset
270 local username, host = event.username, event.host;
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diff changeset
271 local user = hosts[host].sessions[username];
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diff changeset
272 if user and user.sessions then
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parents: 694
diff changeset
273 for jid, session in pairs(user.sessions) do
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parents: 694
diff changeset
274 session:close{ condition = "not-authorized", text = "Account deleted" };
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diff changeset
275 end
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diff changeset
276 end
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277 end, 200);
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278
676
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diff changeset
279 --- Port listener
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diff changeset
280 function listener.onconnect(conn)
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diff changeset
281 local session = sm_new_session(conn);
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diff changeset
282 sessions[conn] = session;
129
5fc00a3e47b5 mod_websocket: Initial commit
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parents:
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283
676
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diff changeset
284 session.log("info", "Client connected");
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Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
285
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
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parents: 129
diff changeset
286 -- Client is using legacy SSL (otherwise mod_tls sets this flag)
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parents: 129
diff changeset
287 if conn:ssl() then
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
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parents: 129
diff changeset
288 session.secure = true;
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Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
289 end
129
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parents:
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290
676
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parents: 129
diff changeset
291 if opt_keepalives then
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parents: 129
diff changeset
292 conn:setoption("keepalive", opt_keepalives);
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
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parents: 129
diff changeset
293 end
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Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
294
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
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parents: 129
diff changeset
295 session.close = session_close;
129
5fc00a3e47b5 mod_websocket: Initial commit
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parents:
diff changeset
296
676
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parents: 129
diff changeset
297 local stream = new_xmpp_stream(session, stream_callbacks);
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parents: 129
diff changeset
298 session.stream = stream;
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Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
299 session.notopen = true;
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
300
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
301 function session.reset_stream()
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
302 session.notopen = true;
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
303 session.stream:reset();
129
5fc00a3e47b5 mod_websocket: Initial commit
Ali Sabil <ali.sabil@gmail.com>
parents:
diff changeset
304 end
5fc00a3e47b5 mod_websocket: Initial commit
Ali Sabil <ali.sabil@gmail.com>
parents:
diff changeset
305
842
32df4d13f178 mod_websocket: More robust frame handling
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parents: 840
diff changeset
306 local function websocket_close(code, message)
32df4d13f178 mod_websocket: More robust frame handling
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parents: 840
diff changeset
307 local data = string.char(code/0x100) .. string.char(code%0x100) .. message;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
308 conn:write(build_frame({opcode = 0x8, FIN = true, data = data}));
32df4d13f178 mod_websocket: More robust frame handling
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parents: 840
diff changeset
309 conn:close();
32df4d13f178 mod_websocket: More robust frame handling
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parents: 840
diff changeset
310 end
32df4d13f178 mod_websocket: More robust frame handling
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parents: 840
diff changeset
311
676
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
312 local filter = session.filter;
842
32df4d13f178 mod_websocket: More robust frame handling
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parents: 840
diff changeset
313 local dataBuffer;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
314 local function handle_frame(frame)
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parents: 840
diff changeset
315 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
316
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
317 -- Error cases
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
318 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
319 websocket_close(1002, "Reserved bits not zero");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
320 return false;
32df4d13f178 mod_websocket: More robust frame handling
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parents: 840
diff changeset
321 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
322
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
323 if frame.opcode >= 0x8 and frame.length > 125 then -- Control frame with too much payload
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
324 websocket_close(1002, "Payload too large");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
325 return false;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
326 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
327
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
328 if frame.opcode >= 0x8 and not frame.FIN then -- Fragmented control frame
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
329 websocket_close(1002, "Fragmented control frame");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
330 return false;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
331 end
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
332
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
333 if (frame.opcode > 0x2 and frame.opcode < 0x8) or (frame.opcode > 0xA) then
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
334 websocket_close(1002, "Reserved opcode");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
335 return false;
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
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
338 if frame.opcode == 0x0 and not dataBuffer then
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
339 websocket_close(1002, "Unexpected continuation frame");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
340 return false;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
341 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
342
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
343 if (frame.opcode == 0x1 or frame.opcode == 0x2) and dataBuffer then
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
344 websocket_close(1002, "Continuation frame expected");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
345 return false;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
346 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
347
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
348 -- Valid cases
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
349 if frame.opcode == 0x0 then -- Continuation frame
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
350 dataBuffer = dataBuffer .. frame.data;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
351 elseif frame.opcode == 0x1 then -- Text frame
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
352 dataBuffer = frame.data;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
353 elseif frame.opcode == 0x2 then -- Binary frame
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
354 websocket_close(1003, "Only text frames are supported");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
355 return false;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
356 elseif frame.opcode == 0x8 then -- Close request
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
357 websocket_close(1000, "Goodbye");
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
358 return false;
691
04662cc35280 mod_websocket: Answer ping frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 690
diff changeset
359 elseif frame.opcode == 0x9 then -- Ping frame
04662cc35280 mod_websocket: Answer ping frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 690
diff changeset
360 frame.opcode = 0xA;
04662cc35280 mod_websocket: Answer ping frames
Florian Zeitz <florob@babelmonkeys.de>
parents: 690
diff changeset
361 conn:write(build_frame(frame));
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
362 return true;
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
363 else
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
364 log("warn", "Received frame with unsupported opcode %i", frame.opcode);
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
365 return true;
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
366 end
676
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
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parents: 129
diff changeset
367
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
368 if frame.FIN then
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
369 data = dataBuffer;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
370 dataBuffer = nil;
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
371
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
372 -- COMPAT: Current client implementations send a self-closing <stream:stream>
692
2de21fa40382 mod_websocket: Make sending a self-closing <stream:stream> tag configurable
Florian Zeitz <florob@babelmonkeys.de>
parents: 691
diff changeset
373 if self_closing_stream then
693
7d165cd6168c mod_websocket: Only un-self-close <stream:stream>s
Florian Zeitz <florob@babelmonkeys.de>
parents: 692
diff changeset
374 data = data:gsub("(<stream:stream.*)/>$", "%1>");
692
2de21fa40382 mod_websocket: Make sending a self-closing <stream:stream> tag configurable
Florian Zeitz <florob@babelmonkeys.de>
parents: 691
diff changeset
375 end
690
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
376
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
377 data = filter("bytes/in", data);
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
378 if data then
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
379 local ok, err = stream:feed(data);
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
380 if ok then return; end
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
381 log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
382 session:close("not-well-formed");
5acc203972f3 mod_websocket: Add fragmentation support
Florian Zeitz <florob@babelmonkeys.de>
parents: 689
diff changeset
383 end
676
54fa9d6d7809 mod_websocket: New mod_c2s based version, still WIP
Florian Zeitz <florob@babelmonkeys.de>
parents: 129
diff changeset
384 end
842
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
385 return true;
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
386 end
32df4d13f178 mod_websocket: More robust frame handling
Florian Zeitz <florob@babelmonkeys.de>
parents: 840
diff changeset
387
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388 local frameBuffer = "";
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389 function session.data(data)
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390 frameBuffer = frameBuffer .. data;
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391 local frame, length = parse_frame(frameBuffer);
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392
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393 while frame do
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394 frameBuffer = frameBuffer:sub(length + 1);
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395 if not handle_frame(frame) then return; end
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396 frame, length = parse_frame(frameBuffer);
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397 end
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398 end
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399
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400 function session.send(s)
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401 conn:write(build_frame({ FIN = true, opcode = 0x01, data = tostring(s)}));
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402 end
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403
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404 if c2s_timeout then
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405 add_task(c2s_timeout, function ()
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406 if session.type == "c2s_unauthed" then
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407 session:close("connection-timeout");
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408 end
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409 end);
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410 end
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411
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412 session.dispatch_stanza = stream_callbacks.handlestanza;
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413 end
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414
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415 function listener.onincoming(conn, data)
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416 local session = sessions[conn];
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417 if session then
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418 session.data(data);
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419 else
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420 listener.onconnect(conn, data);
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421 session = sessions[conn];
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422 session.data(data);
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423 end
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424 end
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425
676
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426 function listener.ondisconnect(conn, err)
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427 local session = sessions[conn];
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428 if session then
839
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429 (session.log or log)("info", "Client disconnected: %s", err or "connection closed");
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430 sm_destroy_session(session, err);
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431 sessions[conn] = nil;
129
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432 end
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433 end
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434
676
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diff changeset
435 function listener.associate_session(conn, session)
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436 sessions[conn] = session;
129
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437 end
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438
676
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439 function handle_request(event, path)
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440 local request, response = event.request, event.response;
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441
689
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442 if not request.headers.sec_websocket_key then
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443 response.headers.content_type = "text/html";
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444 return [[<!DOCTYPE html><html><head><title>Websocket</title></head><body>
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445 <p>It works! Now point your WebSocket client to this URL to connect to Prosody.</p>
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446 </body></html>]];
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447 end
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448
844
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449 local wants_xmpp = false;
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450 (request.headers.sec_websocket_protocol or ""):gsub("([^,]*),?", function (proto)
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451 if proto == "xmpp" then wants_xmpp = true; end
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452 end);
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453
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454 if not wants_xmpp then
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diff changeset
455 return 501;
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456 end
842
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457
676
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458 response.conn:setlistener(listener);
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459 response.status = "101 Switching Protocols";
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460 response.headers.Upgrade = "websocket";
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461 response.headers.Connection = "Upgrade";
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462 response.headers.Sec_WebSocket_Accept = base64(sha1(request.headers.sec_websocket_key .. "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"));
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463 response.headers.Sec_WebSocket_Protocol = "xmpp";
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diff changeset
464
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diff changeset
465 return "";
129
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parents:
diff changeset
466 end
676
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diff changeset
467
688
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diff changeset
468 function module.add_host(module)
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diff changeset
469 module:depends("http");
676
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470 module:provides("http", {
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diff changeset
471 name = "xmpp-websocket";
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diff changeset
472 route = {
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diff changeset
473 ["GET /*"] = handle_request;
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diff changeset
474 };
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diff changeset
475 });
129
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parents:
diff changeset
476 end