prosody
1777271a1ec0
net/http.lua

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net/http.lua @ 4972:1777271a1ec0

net.http: Use base64 from util.encodings instead of luasocket
author Kim Alvefur <zash@zash.se>
date Sat, 07 Jul 2012 23:22:15 +0200
parent 4865:9171dc2357e0
child 4977:7006ccbf22a9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local socket = require "socket"
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10 local b64 = require "util.encodings".base64.encode;
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11 local url = require "socket.url"
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12 local httpstream_new = require "util.httpstream".new;
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13
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14 local server = require "net.server"
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15
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16 local t_insert, t_concat = table.insert, table.concat;
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17 local pairs, ipairs = pairs, ipairs;
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18 local tonumber, tostring, xpcall, select, debug_traceback, char, format =
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19 tonumber, tostring, xpcall, select, debug.traceback, string.char, string.format;
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20
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21 local log = require "util.logger".init("http");
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22
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23 module "http"
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24
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25 local requests = {}; -- Open requests
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26
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27 local listener = { default_port = 80, default_mode = "*a" };
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28
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29 function listener.onconnect(conn)
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30 local req = requests[conn];
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31 -- Send the request
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32 local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
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33 if req.query then
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34 t_insert(request_line, 4, "?"..req.query);
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35 end
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36
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37 conn:write(t_concat(request_line));
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38 local t = { [2] = ": ", [4] = "\r\n" };
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39 for k, v in pairs(req.headers) do
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40 t[1], t[3] = k, v;
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41 conn:write(t_concat(t));
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42 end
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43 conn:write("\r\n");
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44
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45 if req.body then
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46 conn:write(req.body);
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47 end
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48 end
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49
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50 function listener.onincoming(conn, data)
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51 local request = requests[conn];
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52
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53 if not request then
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54 log("warn", "Received response from connection %s with no request attached!", tostring(conn));
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55 return;
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56 end
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57
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58 if data and request.reader then
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59 request:reader(data);
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60 end
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61 end
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62
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63 function listener.ondisconnect(conn, err)
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64 local request = requests[conn];
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65 if request and request.conn then
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66 request:reader(nil);
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67 end
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68 requests[conn] = nil;
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69 end
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70
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71 function urlencode(s) return s and (s:gsub("[^a-zA-Z0-9.~_-]", function (c) return format("%%%02x", c:byte()); end)); end
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72 function urldecode(s) return s and (s:gsub("%%(%x%x)", function (c) return char(tonumber(c,16)); end)); end
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73
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74 local function _formencodepart(s)
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75 return s and (s:gsub("%W", function (c)
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76 if c ~= " " then
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77 return format("%%%02x", c:byte());
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78 else
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79 return "+";
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80 end
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81 end));
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82 end
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83
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84 function formencode(form)
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85 local result = {};
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86 if form[1] then -- Array of ordered { name, value }
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87 for _, field in ipairs(form) do
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88 t_insert(result, _formencodepart(field.name).."=".._formencodepart(field.value));
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89 end
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90 else -- Unordered map of name -> value
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91 for name, value in pairs(form) do
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92 t_insert(result, _formencodepart(name).."=".._formencodepart(value));
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93 end
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94 end
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95 return t_concat(result, "&");
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96 end
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97
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98 function formdecode(s)
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99 if not s:match("=") then return urldecode(s); end
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100 local r = {};
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101 for k, v in s:gmatch("([^=&]*)=([^&]*)") do
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102 k, v = k:gsub("%+", "%%20"), v:gsub("%+", "%%20");
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103 k, v = urldecode(k), urldecode(v);
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104 t_insert(r, { name = k, value = v });
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105 r[k] = v;
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106 end
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107 return r;
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108 end
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109
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110 local function request_reader(request, data, startpos)
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111 if not request.parser then
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112 if not data then return; end
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113 local function success_cb(r)
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114 if request.callback then
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115 for k,v in pairs(r) do request[k] = v; end
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116 request.callback(r.body, r.code, request, r);
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117 request.callback = nil;
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118 end
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119 destroy_request(request);
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120 end
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121 local function error_cb(r)
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122 if request.callback then
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123 request.callback(r or "connection-closed", 0, request);
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124 request.callback = nil;
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125 end
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126 destroy_request(request);
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127 end
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128 local function options_cb()
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129 return request;
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130 end
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131 request.parser = httpstream_new(success_cb, error_cb, "client", options_cb);
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132 end
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133 request.parser:feed(data);
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134 end
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135
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136 local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end
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137 function request(u, ex, callback)
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138 local req = url.parse(u);
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139
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140 if not (req and req.host) then
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141 callback(nil, 0, req);
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142 return nil, "invalid-url";
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143 end
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144
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145 if not req.path then
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146 req.path = "/";
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147 end
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148
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149 local method, headers, body;
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150
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151 headers = {
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152 ["Host"] = req.host;
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153 ["User-Agent"] = "Prosody XMPP Server";
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154 };
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155
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156 if req.userinfo then
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157 headers["Authorization"] = "Basic "..b64(req.userinfo);
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158 end
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159
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160 if ex then
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161 req.onlystatus = ex.onlystatus;
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162 body = ex.body;
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163 if body then
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164 method = "POST";
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165 headers["Content-Length"] = tostring(#body);
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166 headers["Content-Type"] = "application/x-www-form-urlencoded";
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167 end
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168 if ex.method then method = ex.method; end
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169 if ex.headers then
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170 for k, v in pairs(ex.headers) do
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171 headers[k] = v;
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172 end
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173 end
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174 end
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175
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176 -- Attach to request object
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177 req.method, req.headers, req.body = method, headers, body;
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178
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179 local using_https = req.scheme == "https";
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180 local port = tonumber(req.port) or (using_https and 443 or 80);
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181
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182 -- Connect the socket, and wrap it with net.server
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183 local conn = socket.tcp();
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184 conn:settimeout(10);
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185 local ok, err = conn:connect(req.host, port);
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186 if not ok and err ~= "timeout" then
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187 callback(nil, 0, req);
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188 return nil, err;
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189 end
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190
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191 req.handler, req.conn = server.wrapclient(conn, req.host, port, listener, "*a", using_https and { mode = "client", protocol = "sslv23" });
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192 req.write = function (...) return req.handler:write(...); end
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193
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194 req.callback = function (content, code, request, response) log("debug", "Calling callback, status %s", code or "---"); return select(2, xpcall(function () return callback(content, code, request, response) end, handleerr)); end
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195 req.reader = request_reader;
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196 req.state = "status";
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197
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198 requests[req.handler] = req;
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199 return req;
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200 end
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201
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202 function destroy_request(request)
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203 if request.conn then
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204 request.conn = nil;
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205 request.handler:close()
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206 listener.ondisconnect(request.handler, "closed");
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207 end
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208 end
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209
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210 _M.urlencode = urlencode;
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211
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212 return _M;