prosody
cbe9fa2d3787
net/http.lua

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net/http.lua @ 5448:cbe9fa2d3787

net.http: Throw error when connecting to a http:// URL without LuaSec available
author Matthew Wild <mwild1@gmail.com>
date Mon, 08 Apr 2013 16:40:27 +0100
parent 5354:18ebc3874364
child 5458:84162b81c863
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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 ssl_available = pcall(require, "ssl");
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15
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16 local server = require "net.server"
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17
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18 local t_insert, t_concat = table.insert, table.concat;
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19 local pairs, ipairs = pairs, ipairs;
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20 local tonumber, tostring, xpcall, select, debug_traceback, char, format =
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21 tonumber, tostring, xpcall, select, debug.traceback, string.char, string.format;
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23 local log = require "util.logger".init("http");
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24
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25 module "http"
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26
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27 local requests = {}; -- Open requests
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29 local listener = { default_port = 80, default_mode = "*a" };
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30
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31 function listener.onconnect(conn)
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32 local req = requests[conn];
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33 -- Send the request
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34 local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
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35 if req.query then
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36 t_insert(request_line, 4, "?"..req.query);
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37 end
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38
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39 conn:write(t_concat(request_line));
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40 local t = { [2] = ": ", [4] = "\r\n" };
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41 for k, v in pairs(req.headers) do
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42 t[1], t[3] = k, v;
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43 conn:write(t_concat(t));
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44 end
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45 conn:write("\r\n");
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46
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47 if req.body then
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48 conn:write(req.body);
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49 end
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50 end
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51
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52 function listener.onincoming(conn, data)
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53 local request = requests[conn];
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54
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55 if not request then
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56 log("warn", "Received response from connection %s with no request attached!", tostring(conn));
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57 return;
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58 end
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59
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60 if data and request.reader then
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61 request:reader(data);
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62 end
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63 end
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64
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65 function listener.ondisconnect(conn, err)
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66 local request = requests[conn];
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67 if request and request.conn then
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68 request:reader(nil);
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69 end
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70 requests[conn] = nil;
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71 end
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72
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73 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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74 function urldecode(s) return s and (s:gsub("%%(%x%x)", function (c) return char(tonumber(c,16)); end)); end
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75
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76 local function _formencodepart(s)
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77 return s and (s:gsub("%W", function (c)
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78 if c ~= " " then
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79 return format("%%%02x", c:byte());
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80 else
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81 return "+";
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82 end
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83 end));
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84 end
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85
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86 function formencode(form)
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87 local result = {};
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88 if form[1] then -- Array of ordered { name, value }
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89 for _, field in ipairs(form) do
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90 t_insert(result, _formencodepart(field.name).."=".._formencodepart(field.value));
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91 end
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92 else -- Unordered map of name -> value
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93 for name, value in pairs(form) do
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94 t_insert(result, _formencodepart(name).."=".._formencodepart(value));
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95 end
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96 end
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97 return t_concat(result, "&");
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98 end
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99
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100 function formdecode(s)
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101 if not s:match("=") then return urldecode(s); end
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102 local r = {};
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103 for k, v in s:gmatch("([^=&]*)=([^&]*)") do
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104 k, v = k:gsub("%+", "%%20"), v:gsub("%+", "%%20");
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105 k, v = urldecode(k), urldecode(v);
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106 t_insert(r, { name = k, value = v });
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107 r[k] = v;
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108 end
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109 return r;
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110 end
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111
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112 local function request_reader(request, data, startpos)
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113 if not request.parser then
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114 if not data then return; end
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115 local function success_cb(r)
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116 if request.callback then
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117 for k,v in pairs(r) do request[k] = v; end
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118 request.callback(r.body, r.code, request, r);
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119 request.callback = nil;
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120 end
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121 destroy_request(request);
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122 end
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123 local function error_cb(r)
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124 if request.callback then
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125 request.callback(r or "connection-closed", 0, request);
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126 request.callback = nil;
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127 end
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128 destroy_request(request);
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129 end
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130 local function options_cb()
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131 return request;
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132 end
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133 request.parser = httpstream_new(success_cb, error_cb, "client", options_cb);
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134 end
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135 request.parser:feed(data);
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136 end
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137
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138 local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end
646
90da4c9b34b5 HTTP requests now have status code as a number instead of a string. Switched parameters on both http.request() and the callback to better match LuaSocket's http module
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139 function request(u, ex, callback)
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140 local req = url.parse(u);
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141
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142 if not (req and req.host) then
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143 callback(nil, 0, req);
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144 return nil, "invalid-url";
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145 end
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146
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147 if not req.path then
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148 req.path = "/";
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149 end
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150
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151 local method, headers, body;
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152
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153 headers = {
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154 ["Host"] = req.host;
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155 ["User-Agent"] = "Prosody XMPP Server";
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156 };
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157
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158 if req.userinfo then
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159 headers["Authorization"] = "Basic "..b64(req.userinfo);
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160 end
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161
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162 if ex then
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163 req.onlystatus = ex.onlystatus;
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164 body = ex.body;
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165 if body then
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166 method = "POST";
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167 headers["Content-Length"] = tostring(#body);
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168 headers["Content-Type"] = "application/x-www-form-urlencoded";
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169 end
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170 if ex.method then method = ex.method; end
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171 if ex.headers then
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172 for k, v in pairs(ex.headers) do
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173 headers[k] = v;
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174 end
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175 end
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176 end
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177
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178 -- Attach to request object
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179 req.method, req.headers, req.body = method, headers, body;
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180
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181 local using_https = req.scheme == "https";
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182 if using_https and not ssl_available then
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183 error("SSL not available, unable to contact https URL");
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184 end
4356
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185 local port = tonumber(req.port) or (using_https and 443 or 80);
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186
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187 -- Connect the socket, and wrap it with net.server
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188 local conn = socket.tcp();
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189 conn:settimeout(10);
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190 local ok, err = conn:connect(req.host, port);
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191 if not ok and err ~= "timeout" then
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192 callback(nil, 0, req);
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193 return nil, err;
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194 end
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195
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196 local sslctx = false;
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197 if using_https then
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198 sslctx = ex and ex.sslctx or { mode = "client", protocol = "sslv23", options = { "no_sslv2" } };
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199 end
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200
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diff changeset
201 req.handler, req.conn = server.wrapclient(conn, req.host, port, listener, "*a", sslctx);
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202 req.write = function (...) return req.handler:write(...); end
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203
4471
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parents: 4369
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204 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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205 req.reader = request_reader;
678
1859edec2237 Protected call for HTTP request callbacks, to catch errors
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diff changeset
206 req.state = "status";
4351
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diff changeset
207
4557
2abe4e541d52 net.http, httpclient_listener: Merge listener into net.http
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parents: 4471
diff changeset
208 requests[req.handler] = req;
616
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209 return req;
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210 end
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parents:
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211
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parents:
diff changeset
212 function destroy_request(request)
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parents:
diff changeset
213 if request.conn then
2673
61ae351c19b5 net.http: destroy_request(): Remove update for new server API, pass request.handler instead of request.conn to ondisconnect
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parents: 2672
diff changeset
214 request.conn = nil;
61ae351c19b5 net.http: destroy_request(): Remove update for new server API, pass request.handler instead of request.conn to ondisconnect
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parents: 2672
diff changeset
215 request.handler:close()
616
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216 end
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parents:
diff changeset
217 end
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parents:
diff changeset
218
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
219 _M.urlencode = urlencode;
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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220
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
221 return _M;