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bosh.lua

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bosh.lua @ 439:6fc73ad6b1d2

util.table: Add fallback for the Prosody C module
author Kim Alvefur <zash@zash.se>
date Sat, 14 Nov 2020 15:23:08 +0100
parent 411:db462d4feb44
child 490:6b2f31da9610
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
87
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1
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b177bcea2006 squishy, verse.client, verse.component, verse.bosh: Port to util.xmppstream instead of xmlhandlers which has been removed from Prosody. Also remove util.ztact from squishy for the same reason.
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2 local new_xmpp_stream = require "util.xmppstream".new;
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3 local st = require "util.stanza";
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4 require "net.httpclient_listener"; -- Required for net.http to work
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5 local http = require "net.http";
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7 local stream_mt = setmetatable({}, { __index = verse.stream_mt });
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8 stream_mt.__index = stream_mt;
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10 local xmlns_stream = "http://etherx.jabber.org/streams";
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11 local xmlns_bosh = "http://jabber.org/protocol/httpbind";
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13 local reconnect_timeout = 5;
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15 function verse.new_bosh(logger, url)
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16 local stream = {
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17 bosh_conn_pool = {};
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18 bosh_waiting_requests = {};
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19 bosh_rid = math.random(1,999999);
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20 bosh_outgoing_buffer = {};
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21 bosh_url = url;
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22 conn = {};
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23 };
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24 function stream:reopen()
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25 self.bosh_need_restart = true;
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26 self:flush();
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27 end
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28 local conn = verse.new(logger, stream);
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29 return setmetatable(conn, stream_mt);
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30 end
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32 function stream_mt:connect()
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33 self:_send_session_request();
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34 end
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36 function stream_mt:send(data)
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37 self:debug("Putting into BOSH send buffer: %s", tostring(data));
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38 self.bosh_outgoing_buffer[#self.bosh_outgoing_buffer+1] = st.clone(data);
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39 self:flush(); --TODO: Optimize by doing this on next tick (give a chance for data to buffer)
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40 end
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41
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42 function stream_mt:flush()
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43 if self.connected
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44 and #self.bosh_waiting_requests < self.bosh_max_requests
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45 and (#self.bosh_waiting_requests == 0
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46 or #self.bosh_outgoing_buffer > 0
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47 or self.bosh_need_restart) then
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48 self:debug("Flushing...");
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49 local payload = self:_make_body();
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50 local buffer = self.bosh_outgoing_buffer;
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51 for i, stanza in ipairs(buffer) do
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52 payload:add_child(stanza);
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53 buffer[i] = nil;
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54 end
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55 self:_make_request(payload);
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56 else
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57 self:debug("Decided not to flush.");
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58 end
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59 end
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61 function stream_mt:_make_request(payload)
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62 local request, err = http.request(self.bosh_url, { body = tostring(payload) }, function (response, code, request)
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63 if code ~= 0 then
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64 self.inactive_since = nil;
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65 return self:_handle_response(response, code, request);
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66 end
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67
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68 -- Connection issues, we need to retry this request
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69 local time = os.time();
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70 if not self.inactive_since then
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71 self.inactive_since = time; -- So we know when it is time to give up
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72 elseif time - self.inactive_since > self.bosh_max_inactivity then
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73 return self:_disconnected();
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74 else
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75 self:debug("%d seconds left to reconnect, retrying in %d seconds...",
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76 self.bosh_max_inactivity - (time - self.inactive_since), reconnect_timeout);
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77 end
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78
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79 -- Set up reconnect timer
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80 timer.add_task(reconnect_timeout, function ()
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81 self:debug("Retrying request...");
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82 -- Remove old request
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83 for i, waiting_request in ipairs(self.bosh_waiting_requests) do
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84 if waiting_request == request then
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85 table.remove(self.bosh_waiting_requests, i);
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86 break;
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87 end
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88 end
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89 self:_make_request(payload);
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90 end);
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91 end);
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92 if request then
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93 table.insert(self.bosh_waiting_requests, request);
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94 else
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95 self:warn("Request failed instantly: %s", err);
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96 end
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97 end
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98
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99 function stream_mt:_disconnected()
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100 self.connected = nil;
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101 self:event("disconnected");
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102 end
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103
87
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104 function stream_mt:_send_session_request()
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105 local body = self:_make_body();
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106
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107 -- XEP-0124
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108 body.attr.hold = "1";
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109 body.attr.wait = "60";
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110 body.attr["xml:lang"] = "en";
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111 body.attr.ver = "1.6";
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112
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113 -- XEP-0206
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114 body.attr.from = self.jid;
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115 body.attr.to = self.host;
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116 body.attr.secure = 'true';
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117
93
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118 http.request(self.bosh_url, { body = tostring(body) }, function (response, code)
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119 if code == 0 then
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120 -- Failed to connect
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121 return self:_disconnected();
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122 end
87
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123 -- Handle session creation response
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124 local payload = self:_parse_response(response)
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125 if not payload then
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126 self:warn("Invalid session creation response");
93
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127 self:_disconnected();
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128 return;
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129 end
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130 self.bosh_sid = payload.attr.sid; -- Session id
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131 self.bosh_wait = tonumber(payload.attr.wait); -- How long the server may hold connections for
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132 self.bosh_hold = tonumber(payload.attr.hold); -- How many connections the server may hold
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133 self.bosh_max_inactivity = tonumber(payload.attr.inactivity); -- Max amount of time with no connections
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134 self.bosh_max_requests = tonumber(payload.attr.requests) or self.bosh_hold; -- Max simultaneous requests we can make
87
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135 self.connected = true;
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136 self:event("connected");
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137 self:_handle_response_payload(payload);
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138 end);
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139 end
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140
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141 function stream_mt:_handle_response(response, code, request)
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142 if self.bosh_waiting_requests[1] ~= request then
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143 self:warn("Server replied to request that wasn't the oldest");
93
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144 for i, waiting_request in ipairs(self.bosh_waiting_requests) do
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145 if waiting_request == request then
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146 self.bosh_waiting_requests[i] = nil;
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147 break;
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148 end
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149 end
87
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150 else
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151 table.remove(self.bosh_waiting_requests, 1);
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152 end
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153 local payload = self:_parse_response(response);
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154 if payload then
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155 self:_handle_response_payload(payload);
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156 end
93
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157 self:flush();
87
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158 end
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159
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160 function stream_mt:_handle_response_payload(payload)
261
c1404c69dec9 verse.bosh: Fix to loop over every child tag (childtags() is now too namespace-aware for this purpose)
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parents: 161
diff changeset
161 local stanzas = payload.tags;
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diff changeset
162 for i = 1, #stanzas do
c1404c69dec9 verse.bosh: Fix to loop over every child tag (childtags() is now too namespace-aware for this purpose)
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163 local stanza = stanzas[i];
87
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164 if stanza.attr.xmlns == xmlns_stream then
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165 self:event("stream-"..stanza.name, stanza);
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166 elseif stanza.attr.xmlns then
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167 self:event("stream/"..stanza.attr.xmlns, stanza);
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168 else
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169 self:event("stanza", stanza);
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170 end
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171 end
93
2442e751f3cb verse.bosh: Implemented retry/reconnect logic, and handling of disconnects (either CM-intiated or due to connection failures)
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172 if payload.attr.type == "terminate" then
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173 self:_disconnected({reason = payload.attr.condition});
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174 end
87
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175 end
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176
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177 local stream_callbacks = {
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178 stream_ns = "http://jabber.org/protocol/httpbind", stream_tag = "body",
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179 default_ns = "jabber:client",
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180 streamopened = function (session, attr) session.notopen = nil; session.payload = verse.stanza("body", attr); return true; end;
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181 handlestanza = function (session, stanza) session.payload:add_child(stanza); end;
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182 };
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183 function stream_mt:_parse_response(response)
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184 self:debug("Parsing response: %s", response);
93
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185 if response == nil then
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186 self:debug("%s", debug.traceback());
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187 self:_disconnected();
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188 return;
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189 end
262
f47afb171e6e verse.bosh: Minor change to pass Verse stream to stream callbacks (though it isn't currently used by them)
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parents: 261
diff changeset
190 local session = { notopen = true, stream = self };
161
b177bcea2006 squishy, verse.client, verse.component, verse.bosh: Port to util.xmppstream instead of xmlhandlers which has been removed from Prosody. Also remove util.ztact from squishy for the same reason.
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parents: 93
diff changeset
191 local stream = new_xmpp_stream(session, stream_callbacks);
b177bcea2006 squishy, verse.client, verse.component, verse.bosh: Port to util.xmppstream instead of xmlhandlers which has been removed from Prosody. Also remove util.ztact from squishy for the same reason.
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diff changeset
192 stream:feed(response);
87
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193 return session.payload;
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194 end
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195
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196 function stream_mt:_make_body()
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197 self.bosh_rid = self.bosh_rid + 1;
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198 local body = verse.stanza("body", {
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199 xmlns = xmlns_bosh;
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200 content = "text/xml; charset=utf-8";
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diff changeset
201 sid = self.bosh_sid;
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202 rid = self.bosh_rid;
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diff changeset
203 });
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diff changeset
204 if self.bosh_need_restart then
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diff changeset
205 self.bosh_need_restart = nil;
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diff changeset
206 body.attr.restart = 'true';
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diff changeset
207 end
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diff changeset
208 return body;
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diff changeset
209 end