prosody
615a0774e4cc
net/http/server.lua

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net/http/server.lua @ 5877:615a0774e4cc

util.timer: Updated to use util.indexedbheap to provide a more complete API. Timers can now be stopped or rescheduled. Callbacks are now pcall'd. Adding/removing timers from within timer callbacks works better. Optional parameter can be passed when creating timer which gets passed to callback, eliminating the need for closures in various timer uses. Timers are now much more lightweight.
author Waqas Hussain <waqas20@gmail.com>
date Wed, 30 Oct 2013 17:44:42 -0400
parent 5776:bd0ff8ae98a8
child 6071:420c0d3b8583
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rev   line source
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1
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2 local t_insert, t_remove, t_concat = table.insert, table.remove, table.concat;
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3 local parser_new = require "net.http.parser".new;
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4 local events = require "util.events".new();
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5 local addserver = require "net.server".addserver;
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6 local log = require "util.logger".init("http.server");
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7 local os_date = os.date;
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8 local pairs = pairs;
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9 local s_upper = string.upper;
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10 local setmetatable = setmetatable;
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11 local xpcall = xpcall;
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12 local traceback = debug.traceback;
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13 local tostring = tostring;
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14 local codes = require "net.http.codes";
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15
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16 local _M = {};
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17
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18 local sessions = {};
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19 local listener = {};
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20 local hosts = {};
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21 local default_host;
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22
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23 local function is_wildcard_event(event)
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24 return event:sub(-2, -1) == "/*";
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25 end
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26 local function is_wildcard_match(wildcard_event, event)
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27 return wildcard_event:sub(1, -2) == event:sub(1, #wildcard_event-1);
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28 end
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29
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30 local recent_wildcard_events, max_cached_wildcard_events = {}, 10000;
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31
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32 local event_map = events._event_map;
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33 setmetatable(events._handlers, {
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34 -- Called when firing an event that doesn't exist (but may match a wildcard handler)
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35 __index = function (handlers, curr_event)
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36 if is_wildcard_event(curr_event) then return; end -- Wildcard events cannot be fired
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37 -- Find all handlers that could match this event, sort them
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38 -- and then put the array into handlers[curr_event] (and return it)
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39 local matching_handlers_set = {};
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40 local handlers_array = {};
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41 for event, handlers_set in pairs(event_map) do
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42 if event == curr_event or
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43 is_wildcard_event(event) and is_wildcard_match(event, curr_event) then
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44 for handler, priority in pairs(handlers_set) do
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45 matching_handlers_set[handler] = { (select(2, event:gsub("/", "%1"))), is_wildcard_event(event) and 0 or 1, priority };
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46 table.insert(handlers_array, handler);
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47 end
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48 end
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49 end
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50 if #handlers_array > 0 then
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51 table.sort(handlers_array, function(b, a)
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52 local a_score, b_score = matching_handlers_set[a], matching_handlers_set[b];
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53 for i = 1, #a_score do
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54 if a_score[i] ~= b_score[i] then -- If equal, compare next score value
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55 return a_score[i] < b_score[i];
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56 end
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57 end
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58 return false;
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59 end);
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60 else
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61 handlers_array = false;
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62 end
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63 rawset(handlers, curr_event, handlers_array);
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64 if not event_map[curr_event] then -- Only wildcard handlers match, if any
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65 table.insert(recent_wildcard_events, curr_event);
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66 if #recent_wildcard_events > max_cached_wildcard_events then
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67 rawset(handlers, table.remove(recent_wildcard_events, 1), nil);
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68 end
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69 end
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70 return handlers_array;
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71 end;
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72 __newindex = function (handlers, curr_event, handlers_array)
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73 if handlers_array == nil
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74 and is_wildcard_event(curr_event) then
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75 -- Invalidate the indexes of all matching events
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76 for event in pairs(handlers) do
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77 if is_wildcard_match(curr_event, event) then
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78 handlers[event] = nil;
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79 end
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80 end
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81 end
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82 rawset(handlers, curr_event, handlers_array);
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83 end;
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84 });
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85
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86 local handle_request;
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87 local _1, _2, _3;
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88 local function _handle_request() return handle_request(_1, _2, _3); end
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89
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90 local last_err;
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91 local function _traceback_handler(err) last_err = err; log("error", "Traceback[httpserver]: %s", traceback(tostring(err), 2)); end
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92 events.add_handler("http-error", function (error)
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93 return "Error processing request: "..codes[error.code]..". Check your error log for more information.";
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94 end, -1);
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95
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96 function listener.onconnect(conn)
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97 local secure = conn:ssl() and true or nil;
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98 local pending = {};
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99 local waiting = false;
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100 local function process_next()
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101 if waiting then log("debug", "can't process_next, waiting"); return; end
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102 waiting = true;
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103 while sessions[conn] and #pending > 0 do
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104 local request = t_remove(pending);
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105 --log("debug", "process_next: %s", request.path);
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106 --handle_request(conn, request, process_next);
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107 _1, _2, _3 = conn, request, process_next;
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108 if not xpcall(_handle_request, _traceback_handler) then
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109 conn:write("HTTP/1.0 500 Internal Server Error\r\n\r\n"..events.fire_event("http-error", { code = 500, private_message = last_err }));
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110 conn:close();
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111 end
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112 end
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113 --log("debug", "ready for more");
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114 waiting = false;
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115 end
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116 local function success_cb(request)
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117 --log("debug", "success_cb: %s", request.path);
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parents: 5300
diff changeset
118 if waiting then
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Waqas Hussain <waqas20@gmail.com>
parents: 5300
diff changeset
119 log("error", "http connection handler is not reentrant: %s", request.path);
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parents: 5300
diff changeset
120 assert(false, "http connection handler is not reentrant");
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parents: 5300
diff changeset
121 end
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diff changeset
122 request.secure = secure;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
diff changeset
123 t_insert(pending, request);
5333
760c345dc7a1 net.http.server: Ensure HTTP callbacks are never called recursively for pipelined requests.
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parents: 5300
diff changeset
124 process_next();
4631
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
diff changeset
125 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
126 local function error_cb(err)
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
127 log("debug", "error_cb: %s", err or "<nil>");
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parents:
diff changeset
128 -- FIXME don't close immediately, wait until we process current stuff
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129 -- FIXME if err, send off a bad-request response
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parents:
diff changeset
130 sessions[conn] = nil;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
131 conn:close();
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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132 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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133 sessions[conn] = parser_new(success_cb, error_cb);
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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134 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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135
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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136 function listener.ondisconnect(conn)
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parents: 4689
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137 local open_response = conn._http_open_response;
a164fc7057ae net.http.server: Support for on_destroy callback on response objects, and a 'finished' flag to say when they are destroyed (responded to or connection closed)
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parents: 4689
diff changeset
138 if open_response and open_response.on_destroy then
a164fc7057ae net.http.server: Support for on_destroy callback on response objects, and a 'finished' flag to say when they are destroyed (responded to or connection closed)
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parents: 4689
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139 open_response.finished = true;
a164fc7057ae net.http.server: Support for on_destroy callback on response objects, and a 'finished' flag to say when they are destroyed (responded to or connection closed)
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parents: 4689
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140 open_response:on_destroy();
a164fc7057ae net.http.server: Support for on_destroy callback on response objects, and a 'finished' flag to say when they are destroyed (responded to or connection closed)
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parents: 4689
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141 end
4631
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142 sessions[conn] = nil;
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143 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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144
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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145 function listener.onincoming(conn, data)
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146 sessions[conn]:feed(data);
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147 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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148
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
Waqas Hussain <waqas20@gmail.com>
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149 local headerfix = setmetatable({}, {
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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150 __index = function(t, k)
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
151 local v = "\r\n"..k:gsub("_", "-"):gsub("%f[%w].", s_upper)..": ";
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152 t[k] = v;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
153 return v;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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154 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
diff changeset
155 });
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
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156
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
157 function _M.hijack_response(response, listener)
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
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158 error("TODO");
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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159 end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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160 function handle_request(conn, request, finish_cb)
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
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161 --log("debug", "handler: %s", request.path);
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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162 local headers = {};
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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163 for k,v in pairs(request.headers) do headers[k:gsub("-", "_")] = v; end
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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164 request.headers = headers;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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165 request.conn = conn;
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166
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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167 local date_header = os_date('!%a, %d %b %Y %H:%M:%S GMT'); -- FIXME use
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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168 local conn_header = request.headers.connection;
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169 conn_header = conn_header and ","..conn_header:gsub("[ \t]", ""):lower().."," or ""
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parents: 4788
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170 local httpversion = request.httpversion
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parents: 5505
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171 local persistent = conn_header:find(",keep-alive,", 1, true)
5300
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diff changeset
172 or (httpversion == "1.1" and not conn_header:find(",close,", 1, true));
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diff changeset
173
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parents: 4788
diff changeset
174 local response_conn_header;
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diff changeset
175 if persistent then
fcb1be0b4a5c net.http.server: Properly handle persistent connections
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parents: 4788
diff changeset
176 response_conn_header = "Keep-Alive";
fcb1be0b4a5c net.http.server: Properly handle persistent connections
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parents: 4788
diff changeset
177 else
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parents: 4788
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178 response_conn_header = httpversion == "1.1" and "close" or nil
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parents: 4788
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179 end
4631
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
180
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
Waqas Hussain <waqas20@gmail.com>
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diff changeset
181 local response = {
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
182 request = request;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
183 status_code = 200;
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parents: 4788
diff changeset
184 headers = { date = date_header, connection = response_conn_header };
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parents: 4788
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185 persistent = persistent;
4631
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
diff changeset
186 conn = conn;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
187 send = _M.send_response;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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188 finish_cb = finish_cb;
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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diff changeset
189 };
4691
a164fc7057ae net.http.server: Support for on_destroy callback on response objects, and a 'finished' flag to say when they are destroyed (responded to or connection closed)
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parents: 4689
diff changeset
190 conn._http_open_response = response;
4631
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parents:
diff changeset
191
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3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
192 local host = (request.headers.host or ""):match("[^:]+");
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parents: 4735
diff changeset
193
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parents: 4735
diff changeset
194 -- Some sanity checking
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
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parents: 4735
diff changeset
195 local err_code, err;
4740
bd9c8bc8036f net.http.server: Try default_host if client sent no host anywhere, otherwise... fail. It's 2012.
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parents: 4739
diff changeset
196 if not request.path then
4736
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
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parents: 4735
diff changeset
197 err_code, err = 400, "Invalid path";
4739
f1d32a0dc057 net.http.server: Fix traceback on missing host header (thanks darkrain)
Matthew Wild <mwild1@gmail.com>
parents: 4736
diff changeset
198 elseif not hosts[host] then
4736
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
199 if hosts[default_host] then
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
200 host = default_host;
4740
bd9c8bc8036f net.http.server: Try default_host if client sent no host anywhere, otherwise... fail. It's 2012.
Matthew Wild <mwild1@gmail.com>
parents: 4739
diff changeset
201 elseif host then
bd9c8bc8036f net.http.server: Try default_host if client sent no host anywhere, otherwise... fail. It's 2012.
Matthew Wild <mwild1@gmail.com>
parents: 4739
diff changeset
202 err_code, err = 404, "Unknown host: "..host;
4736
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
203 else
4740
bd9c8bc8036f net.http.server: Try default_host if client sent no host anywhere, otherwise... fail. It's 2012.
Matthew Wild <mwild1@gmail.com>
parents: 4739
diff changeset
204 err_code, err = 400, "Missing or invalid 'Host' header";
4736
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
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parents: 4735
diff changeset
205 end
4713
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Matthew Wild <mwild1@gmail.com>
parents: 4710
diff changeset
206 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 5754
diff changeset
207
4713
9c15fa5192d3 net.http.server: Fire http-error 400 if request fails sanity checks
Matthew Wild <mwild1@gmail.com>
parents: 4710
diff changeset
208 if err then
4736
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
209 response.status_code = err_code;
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
210 response:send(events.fire_event("http-error", { code = err_code, message = err }));
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
211 return;
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
212 end
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Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
213
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Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
214 local event = request.method.." "..host..request.path:match("[^?]*");
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
215 local payload = { request = request, response = response };
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
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parents: 4735
diff changeset
216 --log("debug", "Firing event: %s", event);
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
217 local result = events.fire_event(event, payload);
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
218 if result ~= nil then
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
219 if result ~= true then
4788
e14f5a156571 net.http.server: Code cleanup/adjustment now that send_response() accepts response.body
Matthew Wild <mwild1@gmail.com>
parents: 4787
diff changeset
220 local body;
4736
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Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
221 local result_type = type(result);
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
222 if result_type == "number" then
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
223 response.status_code = result;
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
224 if result >= 400 then
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
225 body = events.fire_event("http-error", { code = result });
4631
fc5d3b053454 net.http.{server|codes|parser}: Initial commit.
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parents:
diff changeset
226 end
4736
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
227 elseif result_type == "string" then
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
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parents: 4735
diff changeset
228 body = result;
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
229 elseif result_type == "table" then
3514338c59c3 net.http.server, mod_http: Support http_default_host config option to specify where to direct requests for unknown HTTP vhosts
Matthew Wild <mwild1@gmail.com>
parents: 4735
diff changeset
230 for k, v in pairs(result) do
5404
ae9a47e579d7 net.http.server: Don't overwrite existing response.headers when returning a response object from a HTTP handler (waqas says it's wrong)
Matthew Wild <mwild1@gmail.com>
parents: 5333
diff changeset
231 if k ~= "headers" then
ae9a47e579d7 net.http.server: Don't overwrite existing response.headers when returning a response object from a HTTP handler (waqas says it's wrong)
Matthew Wild <mwild1@gmail.com>
parents: 5333
diff changeset
232 response[k] = v;
ae9a47e579d7 net.http.server: Don't overwrite existing response.headers when returning a response object from a HTTP handler (waqas says it's wrong)
Matthew Wild <mwild1@gmail.com>
parents: 5333
diff changeset
233 else
ae9a47e579d7 net.http.server: Don't overwrite existing response.headers when returning a response object from a HTTP handler (waqas says it's wrong)
Matthew Wild <mwild1@gmail.com>
parents: 5333
diff changeset
234 for header_name, header_value in pairs(v) do
ae9a47e579d7 net.http.server: Don't overwrite existing response.headers when returning a response object from a HTTP handler (waqas says it's wrong)
Matthew Wild <mwild1@gmail.com>
parents: 5333
diff changeset
235 response.headers[header_name] = header_value;
ae9a47e579d7 net.http.server: Don't overwrite existing response.headers when returning a response object from a HTTP handler (waqas says it's wrong)
Matthew Wild <mwild1@gmail.com>
parents: 5333
diff changeset
236 end
ae9a47e579d7 net.http.server: Don't overwrite existing response.headers when returning a response object from a HTTP handler (waqas says it's wrong)
Matthew Wild <mwild1@gmail.com>
parents: 5333
diff changeset
237 end
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238 end
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239 end
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240 response:send(body);
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241 end
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242 return;
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243 end
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244
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245 -- if handler not called, return 404
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246 response.status_code = 404;
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247 response:send(events.fire_event("http-error", { code = 404 }));
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248 end
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249 function _M.send_response(response, body)
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250 if response.finished then return; end
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251 response.finished = true;
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252 response.conn._http_open_response = nil;
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253
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254 local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]);
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255 local headers = response.headers;
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256 body = body or response.body or "";
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257 headers.content_length = #body;
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258
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259 local output = { status_line };
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260 for k,v in pairs(headers) do
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261 t_insert(output, headerfix[k]..v);
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262 end
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263 t_insert(output, "\r\n\r\n");
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264 t_insert(output, body);
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265
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266 response.conn:write(t_concat(output));
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267 if response.on_destroy then
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268 response:on_destroy();
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269 response.on_destroy = nil;
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270 end
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diff changeset
271 if response.persistent then
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272 response:finish_cb();
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273 else
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274 response.conn:close();
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275 end
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276 end
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277 function _M.add_handler(event, handler, priority)
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278 events.add_handler(event, handler, priority);
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279 end
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280 function _M.remove_handler(event, handler)
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281 events.remove_handler(event, handler);
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282 end
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283
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284 function _M.listen_on(port, interface, ssl)
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285 addserver(interface or "*", port, listener, "*a", ssl);
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286 end
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287 function _M.add_host(host)
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288 hosts[host] = true;
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289 end
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290 function _M.remove_host(host)
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291 hosts[host] = nil;
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292 end
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293 function _M.set_default_host(host)
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294 default_host = host;
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295 end
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296 function _M.fire_event(event, ...)
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297 return events.fire_event(event, ...);
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298 end
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299
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300 _M.listener = listener;
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301 _M.codes = codes;
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302 _M._events = events;
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303 return _M;