prosody
8096941b6734
net/http.lua

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net/http.lua @ 1151:8096941b6734

util.stanza: Omit unused clone parameter from error_reply()
author Waqas Hussain <waqas20@gmail.com>
date Fri, 15 May 2009 06:39:53 +0500
parent 1112:e8a00a2ea910
child 1331:4443309b5528
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1
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2 local socket = require "socket"
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3 local mime = require "mime"
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4 local url = require "socket.url"
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5
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6 local server = require "net.server"
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7
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8 local connlisteners_get = require "net.connlisteners".get;
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9 local listener = connlisteners_get("httpclient") or error("No httpclient listener!");
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10
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11 local t_insert, t_concat = table.insert, table.concat;
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12 local tonumber, tostring, pairs, xpcall, select, debug_traceback, char =
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13 tonumber, tostring, pairs, xpcall, select, debug.traceback, string.char;
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1859edec2237 Protected call for HTTP request callbacks, to catch errors
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14
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15 local log = require "util.logger".init("http");
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16 local print = function () end
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17
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18 local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%02x", c:byte()); end)); end
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19
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20 module "http"
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21
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22 local function expectbody(reqt, code)
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23 if reqt.method == "HEAD" then return nil end
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24 if code == 204 or code == 304 then return nil end
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25 if code >= 100 and code < 200 then return nil end
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26 return 1
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27 end
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28
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29 local function request_reader(request, data, startpos)
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30 if not data then
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31 if request.body then
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32 log("debug", "Connection closed, but we have data, calling callback...");
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33 request.callback(t_concat(request.body), request.code, request);
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34 elseif request.state ~= "completed" then
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35 -- Error.. connection was closed prematurely
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36 request.callback("connection-closed", 0, request);
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37 end
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38 destroy_request(request);
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39 request.body = nil;
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40 request.state = "completed";
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41 return;
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42 end
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43 if request.state == "body" and request.state ~= "completed" then
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44 print("Reading body...")
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45 if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.responseheaders["content-length"]); end
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46 if startpos then
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47 data = data:sub(startpos, -1)
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48 end
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49 t_insert(request.body, data);
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50 if request.bodylength then
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51 request.havebodylength = request.havebodylength + #data;
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52 if request.havebodylength >= request.bodylength then
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53 -- We have the body
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54 log("debug", "Have full body, calling callback");
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55 if request.callback then
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56 request.callback(t_concat(request.body), request.code, request);
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57 end
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58 request.body = nil;
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59 request.state = "completed";
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60 else
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61 print("", "Have "..request.havebodylength.." bytes out of "..request.bodylength);
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62 end
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63 end
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64 elseif request.state == "headers" then
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65 print("Reading headers...")
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66 local pos = startpos;
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67 local headers = request.responseheaders or {};
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68 for line in data:sub(startpos, -1):gmatch("(.-)\r\n") do
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69 startpos = startpos + #line + 2;
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70 local k, v = line:match("(%S+): (.+)");
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71 if k and v then
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72 headers[k:lower()] = v;
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73 print("Header: "..k:lower().." = "..v);
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74 elseif #line == 0 then
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75 request.responseheaders = headers;
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76 break;
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77 else
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78 print("Unhandled header line: "..line);
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79 end
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80 end
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81 -- Reached the end of the headers
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82 request.state = "body";
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83 if #data > startpos then
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84 return request_reader(request, data, startpos);
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85 end
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86 elseif request.state == "status" then
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87 print("Reading status...")
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88 local http, code, text, linelen = data:match("^HTTP/(%S+) (%d+) (.-)\r\n()", startpos);
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89 code = tonumber(code);
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90 if not code then
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91 return request.callback("invalid-status-line", 0, request);
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92 end
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93
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94 request.code, request.responseversion = code, http;
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95
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96 if request.onlystatus or not expectbody(request, code) then
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97 if request.callback then
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98 request.callback(nil, code, request);
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99 end
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100 destroy_request(request);
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101 return;
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102 end
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103
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104 request.state = "headers";
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105
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106 if #data > linelen then
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107 return request_reader(request, data, linelen);
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108 end
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109 end
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110 end
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111
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112 local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end
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113 function request(u, ex, callback)
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114 local req = url.parse(u);
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115
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116 if not (req and req.host) then
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117 callback(nil, 0, req);
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118 return nil, "invalid-url";
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119 end
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120
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121 if not req.path then
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122 req.path = "/";
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123 end
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124
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125 local custom_headers, body;
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126 local default_headers = { ["Host"] = req.host, ["User-Agent"] = "Prosody XMPP Server" }
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127
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128
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129 if req.userinfo then
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130 default_headers["Authorization"] = "Basic "..mime.b64(req.userinfo);
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131 end
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132
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133 if ex then
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134 custom_headers = ex.headers;
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135 req.onlystatus = ex.onlystatus;
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136 body = ex.body;
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137 if body then
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138 req.method = "POST ";
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139 default_headers["Content-Length"] = tostring(#body);
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140 default_headers["Content-Type"] = "application/x-www-form-urlencoded";
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141 end
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142 if ex.method then req.method = ex.method; end
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143 end
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144
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145 req.handler, req.conn = server.wrapclient(socket.tcp(), req.host, req.port or 80, listener, "*a");
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146 req.write = req.handler.write;
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147 req.conn:settimeout(0);
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148 local ok, err = req.conn:connect(req.host, req.port or 80);
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149 if not ok and err ~= "timeout" then
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6737d005a84a net.http: Don't throw error on invalid URLs. Fixes #56.
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150 callback(nil, 0, req);
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151 return nil, err;
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152 end
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153
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154 local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
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155
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156 if req.query then
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157 t_insert(request_line, 4, "?");
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158 t_insert(request_line, 5, req.query);
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159 end
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160
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161 req.write(t_concat(request_line));
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162 local t = { [2] = ": ", [4] = "\r\n" };
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163 if custom_headers then
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164 for k, v in pairs(custom_headers) do
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165 t[1], t[3] = k, v;
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166 req.write(t_concat(t));
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167 default_headers[k] = nil;
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168 end
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169 end
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170
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171 for k, v in pairs(default_headers) do
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172 t[1], t[3] = k, v;
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173 req.write(t_concat(t));
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174 default_headers[k] = nil;
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175 end
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176 req.write("\r\n");
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177
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178 if body then
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179 req.write(body);
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180 end
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181
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182 req.callback = function (content, code, request) log("debug", "Calling callback, status %s", code or "---"); return select(2, xpcall(function () return callback(content, code, request) end, handleerr)); end
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183 req.reader = request_reader;
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184 req.state = "status";
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185
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186 listener.register_request(req.handler, req);
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187
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188 return req;
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189 end
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190
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191 function destroy_request(request)
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192 if request.conn then
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193 request.handler.close()
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194 listener.disconnect(request.conn, "closed");
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195 end
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196 end
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197
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198 _M.urlencode = urlencode;
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199
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200 return _M;