prosody
0b9ed126286e
net/http.lua

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net/http.lua @ 4350:0b9ed126286e

net.http: Small fix to prevent traceback when connection fails before sending the request
author Matthew Wild <mwild1@gmail.com>
date Sat, 20 Aug 2011 15:08:21 -0400
parent 4338:5d5d6c6d121a
child 4351:3f414091a008
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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
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10 local socket = require "socket"
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11 local mime = require "mime"
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12 local url = require "socket.url"
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13 local httpstream_new = require "util.httpstream".new;
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14
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15 local server = require "net.server"
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16
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17 local connlisteners_get = require "net.connlisteners".get;
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18 local listener = connlisteners_get("httpclient") or error("No httpclient listener!");
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19
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20 local t_insert, t_concat = table.insert, table.concat;
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21 local pairs, ipairs = pairs, ipairs;
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22 local tonumber, tostring, xpcall, select, debug_traceback, char, format =
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23 tonumber, tostring, xpcall, select, debug.traceback, string.char, string.format;
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24
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25 local log = require "util.logger".init("http");
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26
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27 module "http"
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29 function urlencode(s) return s and (s:gsub("%W", function (c) return format("%%%02x", c:byte()); end)); end
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30 function urldecode(s) return s and (s:gsub("%%(%x%x)", function (c) return char(tonumber(c,16)); end)); end
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31
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32 local function _formencodepart(s)
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33 return s and (s:gsub("%W", function (c)
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34 if c ~= " " then
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35 return format("%%%02x", c:byte());
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36 else
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37 return "+";
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38 end
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39 end));
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40 end
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41
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42 function formencode(form)
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43 local result = {};
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44 for _, field in ipairs(form) do
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45 t_insert(result, _formencodepart(field.name).."=".._formencodepart(field.value));
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46 end
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47 return t_concat(result, "&");
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48 end
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49
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50 function formdecode(s)
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51 if not s:match("=") then return urldecode(s); end
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52 local r = {};
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53 for k, v in s:gmatch("([^=&]*)=([^&]*)") do
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54 k, v = k:gsub("%+", "%%20"), v:gsub("%+", "%%20");
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55 k, v = urldecode(k), urldecode(v);
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56 t_insert(r, { name = k, value = v });
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57 r[k] = v;
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58 end
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59 return r;
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60 end
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61
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62 local function request_reader(request, data, startpos)
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63 if not request.parser then
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64 if not data then return; end
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65 local function success_cb(r)
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66 if request.callback then
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67 for k,v in pairs(r) do request[k] = v; end
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68 request.callback(r.body, r.code, request);
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69 request.callback = nil;
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70 end
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71 destroy_request(request);
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72 end
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73 local function error_cb(r)
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74 if request.callback then
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75 request.callback(r or "connection-closed", 0, request);
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76 request.callback = nil;
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77 end
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78 destroy_request(request);
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79 end
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80 local function options_cb()
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81 return request;
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82 end
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83 request.parser = httpstream_new(success_cb, error_cb, "client", options_cb);
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84 end
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85 request.parser:feed(data);
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86 end
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87
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88 local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end
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89 function request(u, ex, callback)
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90 local req = url.parse(u);
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91
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92 if not (req and req.host) then
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93 callback(nil, 0, req);
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94 return nil, "invalid-url";
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95 end
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96
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97 if not req.path then
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98 req.path = "/";
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99 end
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100
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101 local custom_headers, body;
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102 local default_headers = { ["Host"] = req.host, ["User-Agent"] = "Prosody XMPP Server" }
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103
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104
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105 if req.userinfo then
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106 default_headers["Authorization"] = "Basic "..mime.b64(req.userinfo);
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107 end
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108
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109 if ex then
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110 custom_headers = ex.headers;
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111 req.onlystatus = ex.onlystatus;
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112 body = ex.body;
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113 if body then
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114 req.method = "POST ";
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115 default_headers["Content-Length"] = tostring(#body);
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116 default_headers["Content-Type"] = "application/x-www-form-urlencoded";
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117 end
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118 if ex.method then req.method = ex.method; end
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119 end
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120
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121 req.handler, req.conn = server.wrapclient(socket.tcp(), req.host, req.port or 80, listener, "*a");
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122 req.write = function (...) return req.handler:write(...); end
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123 req.conn:settimeout(0);
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124 local ok, err = req.conn:connect(req.host, req.port or 80);
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125 if not ok and err ~= "timeout" then
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126 callback(nil, 0, req);
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127 return nil, err;
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128 end
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129
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130 local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
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131
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132 if req.query then
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133 t_insert(request_line, 4, "?");
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134 t_insert(request_line, 5, req.query);
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135 end
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136
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137 req.write(t_concat(request_line));
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138 local t = { [2] = ": ", [4] = "\r\n" };
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139 if custom_headers then
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140 for k, v in pairs(custom_headers) do
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141 t[1], t[3] = k, v;
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142 req.write(t_concat(t));
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143 default_headers[k] = nil;
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144 end
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145 end
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146
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147 for k, v in pairs(default_headers) do
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148 t[1], t[3] = k, v;
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149 req.write(t_concat(t));
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150 default_headers[k] = nil;
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151 end
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152 req.write("\r\n");
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153
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154 if body then
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155 req.write(body);
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156 end
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157
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158 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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159 req.reader = request_reader;
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160 req.state = "status";
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161
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162 listener.register_request(req.handler, req);
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163
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164 return req;
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165 end
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166
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167 function destroy_request(request)
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168 if request.conn then
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169 request.conn = nil;
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170 request.handler:close()
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171 listener.ondisconnect(request.handler, "closed");
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172 end
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173 end
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174
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175 _M.urlencode = urlencode;
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176
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177 return _M;