prosody
ab3c47f4fe1d
net/http.lua

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net/http.lua @ 714:ab3c47f4fe1d

net.http: Fix for callbacks being triggered multiple times for the same request
author Matthew Wild <mwild1@gmail.com>
date Wed, 14 Jan 2009 03:06:26 +0000
parent 678:1859edec2237
child 719:b1eb112478b8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 =
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13 tonumber, tostring, pairs, xpcall, select, debug.traceback;
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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 urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end });
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19 local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%02x", c:byte()); end)); end
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21 module "http"
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22
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23 local function expectbody(reqt, code)
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24 if reqt.method == "HEAD" then return nil end
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25 if code == 204 or code == 304 then return nil end
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26 if code >= 100 and code < 200 then return nil end
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27 return 1
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28 end
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30 local function request_reader(request, data, startpos)
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31 if not data then
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32 if request.body then
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33 log("debug", "Connection closed, but we have data, calling callback...");
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34 request.callback(t_concat(request.body), request.code, request);
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35 elseif request.state ~= "completed" then
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36 -- Error.. connection was closed prematurely
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37 request.callback("connection-closed", 0, request);
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38 end
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39 destroy_request(request);
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40 request.body = nil;
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41 request.state = "completed";
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42 return;
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43 end
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44 if request.state == "body" and request.state ~= "completed" then
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45 print("Reading body...")
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46 if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.responseheaders["content-length"]); end
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47 if startpos then
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48 data = data:sub(startpos, -1)
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49 end
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50 t_insert(request.body, data);
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51 if request.bodylength then
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52 request.havebodylength = request.havebodylength + #data;
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53 if request.havebodylength >= request.bodylength then
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54 -- We have the body
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55 log("debug", "Have full body, calling callback");
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56 if request.callback then
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57 request.callback(t_concat(request.body), request.code, request);
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58 end
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59 request.body = nil;
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60 request.state = "completed";
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61 else
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62 print("", "Have "..request.havebodylength.." bytes out of "..request.bodylength);
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63 end
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64 end
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65 elseif request.state == "headers" then
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66 print("Reading headers...")
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67 local pos = startpos;
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68 local headers = request.responseheaders or {};
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69 for line in data:sub(startpos, -1):gmatch("(.-)\r\n") do
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70 startpos = startpos + #line + 2;
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71 local k, v = line:match("(%S+): (.+)");
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72 if k and v then
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73 headers[k:lower()] = v;
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74 print("Header: "..k:lower().." = "..v);
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75 elseif #line == 0 then
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76 request.responseheaders = headers;
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77 break;
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78 else
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79 print("Unhandled header line: "..line);
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80 end
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81 end
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82 -- Reached the end of the headers
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83 request.state = "body";
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84 if #data > startpos then
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85 return request_reader(request, data, startpos);
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86 end
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87 elseif request.state == "status" then
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88 print("Reading status...")
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89 local http, code, text, linelen = data:match("^HTTP/(%S+) (%d+) (.-)\r\n()", startpos);
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90 code = tonumber(code);
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91 if not code then
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92 return request.callback("invalid-status-line", 0, request);
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93 end
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94
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95 request.code, request.responseversion = code, http;
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96
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97 if request.onlystatus or not expectbody(request, code) then
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98 if request.callback then
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99 request.callback(nil, code, request);
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100 end
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101 destroy_request(request);
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102 return;
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103 end
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104
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105 request.state = "headers";
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106
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107 if #data > linelen then
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108 return request_reader(request, data, linelen);
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109 end
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110 end
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111 end
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112
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113 local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end
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114 function request(u, ex, callback)
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115 local req = url.parse(u);
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116
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117 local custom_headers, body;
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118 local default_headers = { ["Host"] = req.host, ["User-Agent"] = "Prosody XMPP Server" }
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119
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120
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121 if req.userinfo then
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122 default_headers["Authorization"] = "Basic "..mime.b64(req.userinfo);
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123 end
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124
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125 if ex then
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126 custom_headers = ex.custom_headers;
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127 req.onlystatus = ex.onlystatus;
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128 body = ex.body;
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129 if body then
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130 req.method = "POST ";
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131 default_headers["Content-Length"] = tostring(#body);
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132 default_headers["Content-Type"] = "application/x-www-form-urlencoded";
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133 end
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134 if ex.method then req.method = ex.method; end
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135 end
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136
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137 req.handler, req.conn = server.wraptcpclient(listener, socket.tcp(), req.host, req.port or 80, 0, "*a");
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138 req.write = req.handler.write;
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139 req.conn:settimeout(0);
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140 local ok, err = req.conn:connect(req.host, req.port or 80);
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141 if not ok and err ~= "timeout" then
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142 return nil, err;
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143 end
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144
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145 req.write((req.method or "GET ")..req.path.." HTTP/1.0\r\n");
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146 local t = { [2] = ": ", [4] = "\r\n" };
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147 if custom_headers then
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148 for k, v in pairs(custom_headers) do
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149 t[1], t[3] = k, v;
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150 req.write(t_concat(t));
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151 default_headers[k] = nil;
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152 end
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153 end
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154
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155 for k, v in pairs(default_headers) do
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156 t[1], t[3] = k, v;
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157 req.write(t_concat(t));
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158 default_headers[k] = nil;
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159 end
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160 req.write("\r\n");
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161
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162 if body then
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163 req.write(body);
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164 end
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165
678
1859edec2237 Protected call for HTTP request callbacks, to catch errors
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166 req.callback = function (content, code, request) log("debug", "Calling callback, code %s content: %s", code or "---", content or "---"); return select(2, xpcall(function () return callback(content, code, request) end, handleerr)); end
616
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167 req.reader = request_reader;
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168 req.state = "status";
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169
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170 listener.register_request(req.handler, req);
619
6d720aba51cb Oops, don't call server.loop() because we'll be running inside the server
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171
616
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172 return req;
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173 end
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174
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175 function destroy_request(request)
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176 if request.conn then
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177 request.handler.close()
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178 listener.disconnect(request.conn, "closed");
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179 end
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180 end
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181
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182 _M.urlencode = urlencode;
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183
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184 return _M;