prosody
6d720aba51cb
net/http.lua

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net/http.lua @ 619:6d720aba51cb

Oops, don't call server.loop() because we'll be running inside the server
author Matthew Wild <mwild1@gmail.com>
date Fri, 12 Dec 2008 04:38:22 +0000
parent 618:69de678792d6
child 628:3712d36b6d25
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
616
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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 = tonumber, tostring, pairs;
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13 local print = function () end
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14
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15 local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end });
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16 local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%x", c:byte()); end)); end
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17
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18 module "http"
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19
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20 local function expectbody(reqt, code)
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21 if reqt.method == "HEAD" then return nil end
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22 if code == 204 or code == 304 then return nil end
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23 if code >= 100 and code < 200 then return nil end
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24 return 1
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25 end
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26
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27 local function request_reader(request, data, startpos)
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28 if not data then
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29 if request.body then
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30 request.callback(request.code, t_concat(request.body), request);
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31 else
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32 -- Error.. connection was closed prematurely
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33 request.callback(0, "connection-closed", request);
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34 end
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35 destroy_request(request);
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36 return;
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37 end
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38 if request.state == "body" then
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39 print("Reading body...")
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40 if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.responseheaders["content-length"]); end
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41 if startpos then
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42 data = data:sub(startpos, -1)
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43 end
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44 t_insert(request.body, data);
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45 if request.bodylength then
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46 request.havebodylength = request.havebodylength + #data;
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47 if request.havebodylength >= request.bodylength then
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48 -- We have the body
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49 if request.callback then
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50 request.callback(request.code, t_concat(request.body), request);
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51 end
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52 end
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53 print("", "Have "..request.havebodylength.." bytes out of "..request.bodylength);
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54 end
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55 elseif request.state == "headers" then
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56 print("Reading headers...")
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57 local pos = startpos;
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58 local headers = request.responseheaders or {};
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59 for line in data:sub(startpos, -1):gmatch("(.-)\r\n") do
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60 startpos = startpos + #line + 2;
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61 local k, v = line:match("(%S+): (.+)");
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62 if k and v then
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63 headers[k:lower()] = v;
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64 print("Header: "..k:lower().." = "..v);
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65 elseif #line == 0 then
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66 request.responseheaders = headers;
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67 break;
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68 else
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69 print("Unhandled header line: "..line);
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70 end
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71 end
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72 -- Reached the end of the headers
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73 request.state = "body";
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74 if #data > startpos then
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75 return request_reader(request, data, startpos);
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76 end
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77 elseif request.state == "status" then
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78 print("Reading status...")
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79 local http, code, text, linelen = data:match("^HTTP/(%S+) (%d+) (.-)\r\n()", startpos);
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80 if not code then
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81 return request.callback(0, "invalid-status-line", request);
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82 end
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83
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84 request.responsecode, request.responseversion = code, http;
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85
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86 if request.onlystatus or not expectbody(request, tonumber(code)) then
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87 if request.callback then
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88 request.callback(code, nil, request);
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89 end
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90 destroy_request(request);
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91 return;
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92 end
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93
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94 request.state = "headers";
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95
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96 if #data > linelen then
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97 return request_reader(request, data, linelen);
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98 end
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99 end
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100 end
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101
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102 function request(u, callback, ex)
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103 local req = url.parse(u);
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104
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105 local custom_headers, body;
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106 local default_headers = { ["Host"] = req.host, ["User-Agent"] = "Prosody XMPP Server" }
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107
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108
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109 if req.userinfo then
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110 default_headers["Authorization"] = "Basic "..mime.b64(req.userinfo);
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111 end
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112
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113 if ex then
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114 custom_headers = ex.custom_headers;
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115 req.onlystatus = ex.onlystatus;
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116 body = ex.body;
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117 if body then
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118 req.method = "POST ";
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119 default_headers["Content-Length"] = tostring(#body);
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120 default_headers["Content-Type"] = "application/x-www-form-urlencoded";
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121 end
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122 if ex.method then req.method = ex.method; end
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123 end
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124
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125 req.handler, req.conn = server.wraptcpclient(listener, socket.tcp(), req.host, req.port or 80, 0, "*a");
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126 req.write = req.handler.write;
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127 req.conn:settimeout(0);
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128 local ok, err = req.conn:connect(req.host, req.port or 80);
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129 if not ok and err ~= "timeout" then
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130 return nil, err;
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131 end
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132
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133 req.write((req.method or "GET ")..req.path.." HTTP/1.0\r\n");
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134 local t = { [2] = ": ", [4] = "\r\n" };
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135 if custom_headers then
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136 for k, v in pairs(custom_headers) do
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137 t[1], t[3] = k, v;
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138 req.write(t_concat(t));
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139 default_headers[k] = nil;
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140 end
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141 end
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142
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143 for k, v in pairs(default_headers) do
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144 t[1], t[3] = k, v;
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145 req.write(t_concat(t));
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146 default_headers[k] = nil;
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147 end
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148 req.write("\r\n");
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149
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150 if body then
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151 req.write(body);
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152 end
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153
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154 req.callback = callback;
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155 req.reader = request_reader;
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156 req.state = "status"
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157
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158 listener.register_request(req.handler, req);
619
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159
616
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160 return req;
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161 end
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162
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163 function destroy_request(request)
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164 if request.conn then
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165 request.handler.close()
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166 listener.disconnect(request.conn, "closed");
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167 end
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168 end
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169
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170 _M.urlencode = urlencode;
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171
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172 return _M;