Annotate

net/http.lua @ 2809:1a7b5b775275

net.http: Close connection when invalid status line is received from the server
author Matthew Wild <mwild1@gmail.com>
date Fri, 19 Feb 2010 03:21:50 +0000
parent 2808:23bb7e29819e
child 2810:85e253d6c4cf
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2009 Matthew Wild
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3 -- Copyright (C) 2008-2009 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
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14 local server = require "net.server"
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15
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16 local connlisteners_get = require "net.connlisteners".get;
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17 local listener = connlisteners_get("httpclient") or error("No httpclient listener!");
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18
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19 local t_insert, t_concat = table.insert, table.concat;
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20 local tonumber, tostring, pairs, xpcall, select, debug_traceback, char, format =
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21 tonumber, tostring, pairs, xpcall, select, debug.traceback, string.char, string.format;
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22
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23 local log = require "util.logger".init("http");
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24 local print = function () end
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25
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26 module "http"
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27
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28 function urlencode(s) return s and (s:gsub("%W", function (c) return format("%%%02x", c:byte()); end)); end
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29 function urldecode(s) return s and (s:gsub("%%(%x%x)", function (c) return char(tonumber(c,16)); end)); end
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30
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31 local function expectbody(reqt, code)
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32 if reqt.method == "HEAD" then return nil end
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33 if code == 204 or code == 304 or code == 301 then return nil end
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34 if code >= 100 and code < 200 then return nil end
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35 return 1
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36 end
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37
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38 local function request_reader(request, data, startpos)
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39 if not data then
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40 if request.body then
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41 log("debug", "Connection closed, but we have data, calling callback...");
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42 request.callback(t_concat(request.body), request.code, request);
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43 elseif request.state ~= "completed" then
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44 -- Error.. connection was closed prematurely
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45 request.callback("connection-closed", 0, request);
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46 return;
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47 end
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48 destroy_request(request);
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49 request.body = nil;
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50 request.state = "completed";
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51 return;
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52 end
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53 if request.state == "body" and request.state ~= "completed" then
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54 print("Reading body...")
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55 if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.responseheaders["content-length"]); end
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56 if startpos then
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57 data = data:sub(startpos, -1)
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58 end
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59 t_insert(request.body, data);
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60 if request.bodylength then
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61 request.havebodylength = request.havebodylength + #data;
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62 if request.havebodylength >= request.bodylength then
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63 -- We have the body
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64 log("debug", "Have full body, calling callback");
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65 if request.callback then
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66 request.callback(t_concat(request.body), request.code, request);
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67 end
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68 request.body = nil;
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69 request.state = "completed";
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70 else
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71 print("", "Have "..request.havebodylength.." bytes out of "..request.bodylength);
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72 end
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73 end
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74 elseif request.state == "headers" then
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75 print("Reading headers...")
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76 local pos = startpos;
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77 local headers, headers_complete = request.responseheaders;
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78 if not headers then
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79 headers = {};
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80 request.responseheaders = headers;
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81 end
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82 for line in data:sub(startpos, -1):gmatch("(.-)\r\n") do
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83 startpos = startpos + #line + 2;
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84 local k, v = line:match("(%S+): (.+)");
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85 if k and v then
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86 headers[k:lower()] = v;
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87 --print("Header: "..k:lower().." = "..v);
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88 elseif #line == 0 then
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89 headers_complete = true;
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90 break;
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91 else
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92 print("Unhandled header line: "..line);
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93 end
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94 end
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95 if not headers_complete then return; end
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96 -- Reached the end of the headers
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97 if not expectbody(request, request.code) then
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98 request.callback(nil, request.code, request);
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99 return;
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100 end
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101 request.state = "body";
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102 if #data > startpos then
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103 return request_reader(request, data, startpos);
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104 end
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105 elseif request.state == "status" then
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106 print("Reading status...")
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107 local http, code, text, linelen = data:match("^HTTP/(%S+) (%d+) (.-)\r\n()", startpos);
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108 code = tonumber(code);
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109 if not code then
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110 log("warn", "Invalid HTTP status line, telling callback then closing");
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111 local ret = request.callback("invalid-status-line", 0, request);
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112 destroy_request(request);
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113 return ret;
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114 end
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115
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116 request.code, request.responseversion = code, http;
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117
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118 if request.onlystatus then
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119 if request.callback then
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120 request.callback(nil, code, request);
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121 end
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122 destroy_request(request);
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123 return;
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124 end
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125
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126 request.state = "headers";
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127
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128 if #data > linelen then
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129 return request_reader(request, data, linelen);
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130 end
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131 end
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132 end
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133
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134 local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end
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135 function request(u, ex, callback)
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136 local req = url.parse(u);
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137
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Matthew Wild <mwild1@gmail.com>
parents: 739
diff changeset
138 if not (req and req.host) then
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c63f9bc45a85 Fixed: net/http.lua: HTTP request callback wasn't being called on some errors
Waqas Hussain <waqas20@gmail.com>
parents: 903
diff changeset
139 callback(nil, 0, req);
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6737d005a84a net.http: Don't throw error on invalid URLs. Fixes #56.
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140 return nil, "invalid-url";
6737d005a84a net.http: Don't throw error on invalid URLs. Fixes #56.
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141 end
6737d005a84a net.http: Don't throw error on invalid URLs. Fixes #56.
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142
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143 if not req.path then
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144 req.path = "/";
6737d005a84a net.http: Don't throw error on invalid URLs. Fixes #56.
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145 end
6737d005a84a net.http: Don't throw error on invalid URLs. Fixes #56.
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146
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147 local custom_headers, body;
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148 local default_headers = { ["Host"] = req.host, ["User-Agent"] = "Prosody XMPP Server" }
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149
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150
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151 if req.userinfo then
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152 default_headers["Authorization"] = "Basic "..mime.b64(req.userinfo);
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153 end
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154
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155 if ex then
738
cf70342985df net.http: custom_headers -> headers
Matthew Wild <mwild1@gmail.com>
parents: 720
diff changeset
156 custom_headers = ex.headers;
616
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157 req.onlystatus = ex.onlystatus;
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158 body = ex.body;
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159 if body then
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160 req.method = "POST ";
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161 default_headers["Content-Length"] = tostring(#body);
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162 default_headers["Content-Type"] = "application/x-www-form-urlencoded";
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163 end
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164 if ex.method then req.method = ex.method; end
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165 end
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166
739
1def06cd9311 Port to new server.lua, quite some changes, but I believe everything to be working
Matthew Wild <mwild1@gmail.com>
parents: 738
diff changeset
167 req.handler, req.conn = server.wrapclient(socket.tcp(), req.host, req.port or 80, listener, "*a");
616
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168 req.write = req.handler.write;
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169 req.conn:settimeout(0);
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170 local ok, err = req.conn:connect(req.host, req.port or 80);
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171 if not ok and err ~= "timeout" then
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6737d005a84a net.http: Don't throw error on invalid URLs. Fixes #56.
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parents: 739
diff changeset
172 callback(nil, 0, req);
616
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173 return nil, err;
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174 end
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175
719
b1eb112478b8 net.http: Fix to send query part of URL to server
Matthew Wild <mwild1@gmail.com>
parents: 714
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176 local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
b1eb112478b8 net.http: Fix to send query part of URL to server
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parents: 714
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177
b1eb112478b8 net.http: Fix to send query part of URL to server
Matthew Wild <mwild1@gmail.com>
parents: 714
diff changeset
178 if req.query then
b1eb112478b8 net.http: Fix to send query part of URL to server
Matthew Wild <mwild1@gmail.com>
parents: 714
diff changeset
179 t_insert(request_line, 4, "?");
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parents: 714
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180 t_insert(request_line, 5, req.query);
b1eb112478b8 net.http: Fix to send query part of URL to server
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parents: 714
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181 end
b1eb112478b8 net.http: Fix to send query part of URL to server
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parents: 714
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182
b1eb112478b8 net.http: Fix to send query part of URL to server
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parents: 714
diff changeset
183 req.write(t_concat(request_line));
616
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184 local t = { [2] = ": ", [4] = "\r\n" };
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185 if custom_headers then
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
186 for k, v in pairs(custom_headers) do
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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187 t[1], t[3] = k, v;
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parents:
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188 req.write(t_concat(t));
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
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189 default_headers[k] = nil;
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
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190 end
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
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191 end
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parents:
diff changeset
192
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
193 for k, v in pairs(default_headers) do
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
194 t[1], t[3] = k, v;
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parents:
diff changeset
195 req.write(t_concat(t));
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
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196 default_headers[k] = nil;
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parents:
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197 end
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
198 req.write("\r\n");
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199
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parents:
diff changeset
200 if body then
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
201 req.write(body);
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parents:
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202 end
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
203
720
8f22e9fb2291 net.http: Don't log content from server
Matthew Wild <mwild1@gmail.com>
parents: 719
diff changeset
204 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
616
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parents:
diff changeset
205 req.reader = request_reader;
678
1859edec2237 Protected call for HTTP request callbacks, to catch errors
Matthew Wild <mwild1@gmail.com>
parents: 677
diff changeset
206 req.state = "status";
616
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
207
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
208 listener.register_request(req.handler, req);
619
6d720aba51cb Oops, don't call server.loop() because we'll be running inside the server
Matthew Wild <mwild1@gmail.com>
parents: 618
diff changeset
209
616
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
210 return req;
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
211 end
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
212
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
213 function destroy_request(request)
69bc5782b25e Non-blocking HTTP requests (adding net.http)
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
214 if request.conn then
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
215 request.handler.close()
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
216 listener.disconnect(request.conn, "closed");
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
217 end
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
218 end
69bc5782b25e Non-blocking HTTP requests (adding net.http)
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
219
69bc5782b25e Non-blocking HTTP requests (adding net.http)
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
220 _M.urlencode = urlencode;
69bc5782b25e Non-blocking HTTP requests (adding net.http)
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
221
69bc5782b25e Non-blocking HTTP requests (adding net.http)
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parents:
diff changeset
222 return _M;