Tue, 09 Mar 2010 18:19:50 +0500
mod_compression: More robust stanza processing.
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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 server = require "net.server" |
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12 | local url_parse = require "socket.url".parse; |
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13 | |
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14 | local connlisteners_start = require "net.connlisteners".start; |
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15 | local connlisteners_get = require "net.connlisteners".get; |
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16 | local listener; |
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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 s_match, s_gmatch = string.match, string.gmatch; |
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20 | local tonumber, tostring, pairs, ipairs, type = tonumber, tostring, pairs, ipairs, type; |
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21 | |
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22 | local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%02x", c:byte()); end)); end |
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23 | |
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24 | local log = require "util.logger".init("httpserver"); |
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25 | |
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26 | local http_servers = {}; |
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27 | |
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28 | module "httpserver" |
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29 | |
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30 | local default_handler; |
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31 | |
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32 | local function expectbody(reqt) |
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33 | return reqt.method == "POST"; |
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34 | end |
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35 | |
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36 | local function send_response(request, response) |
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37 | -- Write status line |
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38 | local resp; |
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39 | if response.body or response.headers then |
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40 | local body = response.body and tostring(response.body); |
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41 | log("debug", "Sending response to %s", request.id); |
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42 | resp = { "HTTP/1.0 ", response.status or "200 OK", "\r\n"}; |
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43 | local h = response.headers; |
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44 | if h then |
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45 | for k, v in pairs(h) do |
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46 | t_insert(resp, k); |
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47 | t_insert(resp, ": "); |
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48 | t_insert(resp, v); |
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49 | t_insert(resp, "\r\n"); |
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50 | end |
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51 | end |
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52 | if body and not (h and h["Content-Length"]) then |
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53 | t_insert(resp, "Content-Length: "); |
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54 | t_insert(resp, #body); |
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55 | t_insert(resp, "\r\n"); |
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56 | end |
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57 | t_insert(resp, "\r\n"); |
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58 | |
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59 | if body and request.method ~= "HEAD" then |
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60 | t_insert(resp, body); |
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61 | end |
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62 | else |
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63 | -- Response we have is just a string (the body) |
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64 | log("debug", "Sending 200 response to %s", request.id or "<none>"); |
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65 | |
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66 | resp = { "HTTP/1.0 200 OK\r\n" }; |
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67 | t_insert(resp, "Connection: close\r\n"); |
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68 | t_insert(resp, "Content-Type: text/html\r\n"); |
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69 | t_insert(resp, "Content-Length: "); |
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70 | t_insert(resp, #response); |
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71 | t_insert(resp, "\r\n\r\n"); |
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72 | |
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73 | t_insert(resp, response); |
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74 | end |
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75 | request.write(t_concat(resp)); |
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76 | if not request.stayopen then |
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77 | request:destroy(); |
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78 | end |
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79 | end |
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80 | |
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81 | local function call_callback(request, err) |
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82 | if request.handled then return; end |
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83 | request.handled = true; |
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84 | local callback = request.callback; |
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85 | if not callback and request.path then |
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86 | local path = request.url.path; |
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87 | local base = path:match("^/([^/?]+)"); |
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88 | if not base then |
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89 | base = path:match("^http://[^/?]+/([^/?]+)"); |
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90 | end |
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91 | |
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92 | callback = (request.server and request.server.handlers[base]) or default_handler; |
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93 | end |
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94 | if callback then |
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95 | if err then |
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96 | log("debug", "Request error: "..err); |
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97 | if not callback(nil, err, request) then |
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98 | destroy_request(request); |
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99 | end |
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100 | return; |
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101 | end |
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102 | |
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103 | local response = callback(request.method, request.body and t_concat(request.body), request); |
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104 | if response then |
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105 | if response == true and not request.destroyed then |
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106 | -- Keep connection open, we will reply later |
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107 | log("debug", "Request %s left open, on_destroy is %s", request.id, tostring(request.on_destroy)); |
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108 | elseif response ~= true then |
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109 | -- Assume response |
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110 | send_response(request, response); |
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111 | destroy_request(request); |
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112 | end |
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113 | else |
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114 | log("debug", "Request handler provided no response, destroying request..."); |
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115 | -- No response, close connection |
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116 | destroy_request(request); |
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117 | end |
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118 | end |
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119 | end |
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120 | |
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121 | local function request_reader(request, data, startpos) |
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122 | if not data then |
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123 | if request.body then |
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124 | call_callback(request); |
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125 | else |
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126 | -- Error.. connection was closed prematurely |
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127 | call_callback(request, "connection-closed"); |
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128 | end |
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129 | -- Here we force a destroy... the connection is gone, so we can't reply later |
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130 | destroy_request(request); |
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131 | return; |
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132 | end |
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133 | if request.state == "body" then |
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134 | log("debug", "Reading body...") |
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135 | if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.headers["content-length"]); end |
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136 | if startpos then |
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137 | data = data:sub(startpos, -1) |
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138 | end |
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139 | t_insert(request.body, data); |
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140 | if request.bodylength then |
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141 | request.havebodylength = request.havebodylength + #data; |
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142 | if request.havebodylength >= request.bodylength then |
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143 | -- We have the body |
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144 | call_callback(request); |
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145 | end |
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146 | end |
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147 | elseif request.state == "headers" then |
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148 | log("debug", "Reading headers...") |
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149 | local pos = startpos; |
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150 | local headers, headers_complete = request.headers; |
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151 | if not headers then |
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152 | headers = {}; |
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153 | request.headers = headers; |
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154 | end |
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155 | |
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156 | for line in data:gmatch("(.-)\r\n") do |
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157 | startpos = (startpos or 1) + #line + 2; |
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158 | local k, v = line:match("(%S+): (.+)"); |
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159 | if k and v then |
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160 | headers[k:lower()] = v; |
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161 | --log("debug", "Header: '"..k:lower().."' = '"..v.."'"); |
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162 | elseif #line == 0 then |
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163 | headers_complete = true; |
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164 | break; |
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165 | else |
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166 | log("debug", "Unhandled header line: "..line); |
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167 | end |
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168 | end |
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169 | |
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170 | if not headers_complete then return; end |
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171 | |
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172 | if not expectbody(request) then |
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173 | call_callback(request); |
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174 | return; |
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175 | end |
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176 | |
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177 | -- Reached the end of the headers |
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178 | request.state = "body"; |
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179 | if #data > startpos then |
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180 | return request_reader(request, data:sub(startpos, -1)); |
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181 | end |
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182 | elseif request.state == "request" then |
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183 | log("debug", "Reading request line...") |
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184 | local method, path, http, linelen = data:match("^(%S+) (%S+) HTTP/(%S+)\r\n()", startpos); |
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185 | if not method then |
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186 | log("warn", "Invalid HTTP status line, telling callback then closing"); |
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187 | local ret = call_callback(request, "invalid-status-line"); |
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188 | request:destroy(); |
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189 | return ret; |
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190 | end |
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191 | |
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192 | request.method, request.path, request.httpversion = method, path, http; |
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193 | |
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194 | request.url = url_parse(request.path); |
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195 | |
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196 | log("debug", method.." request for "..tostring(request.path) .. " on port "..request.handler.serverport()); |
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197 | |
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198 | if request.onlystatus then |
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199 | if not call_callback(request) then |
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200 | return; |
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201 | end |
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202 | end |
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203 | |
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204 | request.state = "headers"; |
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205 | |
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206 | if #data > linelen then |
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207 | return request_reader(request, data:sub(linelen, -1)); |
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208 | end |
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209 | end |
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210 | end |
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211 | |
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212 | -- The default handler for requests |
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213 | default_handler = function (method, body, request) |
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214 | log("debug", method.." request for "..tostring(request.path) .. " on port "..request.handler.serverport()); |
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215 | return { status = "404 Not Found", |
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216 | headers = { ["Content-Type"] = "text/html" }, |
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217 | body = "<html><head><title>Page Not Found</title></head><body>Not here :(</body></html>" }; |
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218 | end |
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219 | |
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220 | |
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221 | function new_request(handler) |
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222 | return { handler = handler, conn = handler.socket, |
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223 | write = handler.write, state = "request", |
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224 | server = http_servers[handler.serverport()], |
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225 | send = send_response, |
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226 | destroy = destroy_request, |
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227 | id = tostring{}:match("%x+$") |
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228 | }; |
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229 | end |
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230 | |
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231 | function destroy_request(request) |
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232 | log("debug", "Destroying request %s", request.id); |
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233 | listener = listener or connlisteners_get("httpserver"); |
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234 | if not request.destroyed then |
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235 | request.destroyed = true; |
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236 | if request.on_destroy then |
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237 | log("debug", "Request has destroy callback"); |
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238 | request.on_destroy(request); |
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239 | else |
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240 | log("debug", "Request has no destroy callback"); |
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241 | end |
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242 | request.handler.close() |
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243 | if request.conn then |
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244 | listener.disconnect(request.handler, "closed"); |
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245 | end |
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246 | end |
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247 | end |
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248 | |
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249 | function new(params) |
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250 | local http_server = http_servers[params.port]; |
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251 | if not http_server then |
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252 | http_server = { handlers = {} }; |
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253 | http_servers[params.port] = http_server; |
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254 | -- We weren't already listening on this port, so start now |
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255 | connlisteners_start("httpserver", params); |
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256 | end |
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257 | if params.base then |
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258 | http_server.handlers[params.base] = params.handler; |
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259 | end |
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260 | end |
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261 | |
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262 | function set_default_handler(handler) |
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263 | default_handler = handler; |
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264 | end |
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265 | |
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266 | function new_from_config(ports, handle_request, default_options) |
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267 | if type(handle_request) == "string" then -- COMPAT with old plugins |
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268 | log("warn", "Old syntax of httpserver.new_from_config being used to register %s", handle_request); |
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269 | handle_request, default_options = default_options, { base = handle_request }; |
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270 | end |
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271 | for _, options in ipairs(ports) do |
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272 | local port = default_options.port or 5280; |
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273 | local base = default_options.base; |
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274 | local ssl = default_options.ssl or false; |
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275 | local interface = default_options.interface; |
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276 | if type(options) == "number" then |
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277 | port = options; |
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278 | elseif type(options) == "table" then |
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279 | port = options.port or port; |
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280 | base = options.path or base; |
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281 | ssl = options.ssl or ssl; |
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282 | interface = options.interface or interface; |
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283 | elseif type(options) == "string" then |
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284 | base = options; |
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285 | end |
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286 | |
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287 | if ssl then |
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288 | ssl.mode = "server"; |
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289 | ssl.protocol = "sslv23"; |
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290 | ssl.options = "no_sslv2"; |
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291 | end |
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292 | |
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293 | new{ port = port, interface = interface, |
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294 | base = base, handler = handle_request, |
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295 | ssl = ssl, type = (ssl and "ssl") or "tcp" }; |
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296 | end |
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297 | end |
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298 | |
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299 | _M.request_reader = request_reader; |
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300 | _M.send_response = send_response; |
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301 | _M.urlencode = urlencode; |
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302 | |
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303 | return _M; |