prosody
7438b3c68576
net/http/server.lua

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net/http/server.lua @ 4664:7438b3c68576

mod_http: Revamp module for new API and config
author Matthew Wild <mwild1@gmail.com>
date Mon, 23 Apr 2012 14:16:59 +0100
parent 4659:d53142e90cd0
child 4668:cce0c739b0d7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 debug = debug;
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13 local tostring = tostring;
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14 local codes = require "net.http.codes";
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15 local _G = _G;
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d53142e90cd0 net.http.server: Fix legacy net.httpserver fallback (httpserver is no longer a global).
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16 local legacy_httpserver = require "net.httpserver";
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17
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18 local _M = {};
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19
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20 local sessions = {};
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21 local handlers = {};
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22
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23 local listener = {};
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24
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25 local handle_request;
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26 local _1, _2, _3;
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27 local function _handle_request() return handle_request(_1, _2, _3); end
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28 local function _traceback_handler(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug.traceback()); end
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29
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30 function listener.onconnect(conn)
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31 local secure = conn:ssl() and true or nil;
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32 local pending = {};
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33 local waiting = false;
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34 local function process_next(last_response)
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35 --if waiting then log("debug", "can't process_next, waiting"); return; end
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36 if sessions[conn] and #pending > 0 then
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37 local request = t_remove(pending);
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38 --log("debug", "process_next: %s", request.path);
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39 waiting = true;
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40 --handle_request(conn, request, process_next);
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41 _1, _2, _3 = conn, request, process_next;
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42 if not xpcall(_handle_request, _traceback_handler) then
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43 conn:write("HTTP/1.0 503 Internal Server Error\r\n\r\nAn error occured during the processing of this request.");
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44 conn:close();
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45 end
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46 else
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47 --log("debug", "ready for more");
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48 waiting = false;
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49 end
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50 end
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51 local function success_cb(request)
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52 --log("debug", "success_cb: %s", request.path);
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53 request.secure = secure;
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54 t_insert(pending, request);
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55 if not waiting then
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56 process_next();
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57 end
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58 end
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59 local function error_cb(err)
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60 log("debug", "error_cb: %s", err or "<nil>");
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61 -- FIXME don't close immediately, wait until we process current stuff
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62 -- FIXME if err, send off a bad-request response
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63 sessions[conn] = nil;
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64 conn:close();
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65 end
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66 sessions[conn] = parser_new(success_cb, error_cb);
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67 end
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68
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69 function listener.ondisconnect(conn)
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70 sessions[conn] = nil;
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71 end
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72
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73 function listener.onincoming(conn, data)
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74 sessions[conn]:feed(data);
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75 end
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76
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77 local headerfix = setmetatable({}, {
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78 __index = function(t, k)
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79 local v = "\r\n"..k:gsub("_", "-"):gsub("%f[%w].", s_upper)..": ";
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80 t[k] = v;
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81 return v;
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82 end
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83 });
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84
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85 function _M.hijack_response(response, listener)
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86 error("TODO");
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87 end
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88 function handle_request(conn, request, finish_cb)
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89 --log("debug", "handler: %s", request.path);
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90 local headers = {};
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91 for k,v in pairs(request.headers) do headers[k:gsub("-", "_")] = v; end
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92 request.headers = headers;
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93 request.conn = conn;
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94
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95 local date_header = os_date('!%a, %d %b %Y %H:%M:%S GMT'); -- FIXME use
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96 local conn_header = request.headers.connection;
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97 local keep_alive = conn_header == "Keep-Alive" or (request.httpversion == "1.1" and conn_header ~= "close");
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98
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99 local response = {
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100 request = request;
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101 status_code = 200;
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102 headers = { date = date_header, connection = (keep_alive and "Keep-Alive" or "close") };
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103 conn = conn;
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104 send = _M.send_response;
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105 finish_cb = finish_cb;
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106 };
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107
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108 if not request.headers.host then
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109 response.status_code = 400;
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110 response.headers.content_type = "text/html";
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111 response:send("<html><head>400 Bad Request</head><body>400 Bad Request: No Host header.</body></html>");
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112 else
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113 -- TODO call handler
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114 --response.headers.content_type = "text/plain";
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115 --response:send("host="..(request.headers.host or "").."\npath="..request.path.."\n"..(request.body or ""));
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116 local host = request.headers.host;
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117 if host then
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118 host = host:match("[^:]*"):lower();
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119 local event = request.method.." "..host..request.path:match("[^?]*");
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120 local payload = { request = request, response = response };
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121 --[[repeat
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122 if events.fire_event(event, payload) ~= nil then return; end
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123 event = (event:sub(-1) == "/") and event:sub(1, -1) or event:gsub("[^/]*$", "");
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124 if event:sub(-1) == "/" then
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125 event = event:sub(1, -1);
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126 else
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127 event = event:gsub("[^/]*$", "");
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128 end
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129 until not event:find("/", 1, true);]]
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130 --log("debug", "Event: %s", event);
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131 if events.fire_event(event, payload) ~= nil then return; end
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132 -- TODO try adding/stripping / at the end, but this needs to work via an HTTP redirect
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133 if events.fire_event("*", payload) ~= nil then return; end
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134 end
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135
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136 -- if handler not called, fallback to legacy httpserver handlers
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137 _M.legacy_handler(request, response);
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138 end
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139 end
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140 function _M.send_response(response, body)
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141 local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]);
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142 local headers = response.headers;
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143 body = body or "";
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144 headers.content_length = #body;
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145
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146 local output = { status_line };
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147 for k,v in pairs(headers) do
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148 t_insert(output, headerfix[k]..v);
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149 end
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150 t_insert(output, "\r\n\r\n");
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151 t_insert(output, body);
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152
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153 response.conn:write(t_concat(output));
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154 if headers.connection == "Keep-Alive" then
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155 response:finish_cb();
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156 else
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157 response.conn:close();
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158 end
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159 end
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160 function _M.legacy_handler(request, response)
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161 log("debug", "Invoking legacy handler");
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162 local base = request.path:match("^/([^/?]+)");
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163 local legacy_server = legacy_httpserver and legacy_httpserver.new.http_servers[5280];
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164 local handler = legacy_server and legacy_server.handlers[base];
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165 if not handler then handler = legacy_httpserver and legacy_httpserver.set_default_handler.default_handler; end
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166 if handler then
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167 -- add legacy properties to request object
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168 request.url = { path = request.path };
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169 request.handler = response.conn;
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170 request.id = tostring{}:match("%x+$");
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171 local headers = {};
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172 for k,v in pairs(request.headers) do
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173 headers[k:gsub("_", "-")] = v;
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174 end
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175 request.headers = headers;
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176 function request:send(resp)
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177 if self.destroyed then return; end
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178 if resp.body or resp.headers then
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179 if resp.headers then
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180 for k,v in pairs(resp.headers) do response.headers[k] = v; end
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181 end
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182 response:send(resp.body)
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183 else
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184 response:send(resp)
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185 end
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186 self.sent = true;
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187 self:destroy();
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188 end
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189 function request:destroy()
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190 if self.destroyed then return; end
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191 if not self.sent then return self:send(""); end
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192 self.destroyed = true;
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193 if self.on_destroy then
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194 log("debug", "Request has destroy callback");
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195 self:on_destroy();
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196 else
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197 log("debug", "Request has no destroy callback");
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198 end
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199 end
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200 local r = handler(request.method, request.body, request);
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201 if r ~= true then
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202 request:send(r);
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203 end
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204 else
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205 log("debug", "No handler found");
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206 response.status_code = 404;
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207 response.headers.content_type = "text/html";
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208 response:send("<html><head><title>404 Not Found</title></head><body>404 Not Found: No such page.</body></html>");
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209 end
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210 end
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211
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212 function _M.add_handler(event, handler, priority)
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213 events.add_handler(event, handler, priority);
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214 end
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215 function _M.remove_handler(event, handler)
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216 events.remove_handler(event, handler);
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217 end
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218
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219 function _M.listen_on(port, interface, ssl)
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220 addserver(interface or "*", port, listener, "*a", ssl);
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221 end
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222
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223 _M.listener = listener;
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224 _M.codes = codes;
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225 return _M;