prosody
c299726d2b4e
net/httpserver.lua

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net/httpserver.lua @ 4161:c299726d2b4e

net.httpserver: Catch errors thrown in HTTP handlers.
author Waqas Hussain <waqas20@gmail.com>
date Wed, 23 Feb 2011 02:03:55 +0500
parent 4143:eccd3c87d717
child 4164:843240294be1
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rev   line source
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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 server = require "net.server"
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11 local url_parse = require "socket.url".parse;
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12 local httpstream_new = require "util.httpstream".new;
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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 tonumber, tostring, pairs, ipairs, type = tonumber, tostring, pairs, ipairs, type;
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20 local xpcall = xpcall;
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21 local debug_traceback = debug.traceback;
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23 local urlencode = function (s) return s and (s:gsub("%W", function (c) return ("%%%02x"):format(c:byte()); end)); end
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24
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25 local log = require "util.logger".init("httpserver");
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26
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27 local http_servers = {};
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28
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29 module "httpserver"
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30
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31 local default_handler;
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32
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33 local function expectbody(reqt)
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34 return reqt.method == "POST";
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35 end
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36
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37 local function send_response(request, response)
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38 -- Write status line
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39 local resp;
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40 if response.body or response.headers then
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41 local body = response.body and tostring(response.body);
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42 log("debug", "Sending response to %s", request.id);
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43 resp = { "HTTP/1.0 "..(response.status or "200 OK").."\r\n" };
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44 local h = response.headers;
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45 if h then
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46 for k, v in pairs(h) do
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47 t_insert(resp, k..": "..v.."\r\n");
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48 end
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49 end
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50 if body and not (h and h["Content-Length"]) then
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51 t_insert(resp, "Content-Length: "..#body.."\r\n");
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52 end
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53 t_insert(resp, "\r\n");
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54
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55 if body and request.method ~= "HEAD" then
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56 t_insert(resp, body);
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57 end
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58 request.write(t_concat(resp));
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59 else
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60 -- Response we have is just a string (the body)
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61 log("debug", "Sending 200 response to %s", request.id or "<none>");
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62
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63 local resp = "HTTP/1.0 200 OK\r\n"
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64 .. "Connection: close\r\n"
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65 .. "Content-Type: text/html\r\n"
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66 .. "Content-Length: "..#response.."\r\n"
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67 .. "\r\n"
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68 .. response;
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69
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70 request.write(resp);
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71 end
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72 if not request.stayopen then
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73 request:destroy();
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74 end
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75 end
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76
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77 local function call_callback(request, err)
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78 if request.handled then return; end
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79 request.handled = true;
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80 local callback = request.callback;
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81 if not callback and request.path then
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82 local path = request.url.path;
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83 local base = path:match("^/([^/?]+)");
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84 if not base then
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85 base = path:match("^http://[^/?]+/([^/?]+)");
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86 end
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87
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88 callback = (request.server and request.server.handlers[base]) or default_handler;
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89 end
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90 if callback then
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91 local _callback = callback;
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92 function callback(a, b, c)
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93 local status, result = xpcall(function() _callback(a, b, c) end, debug_traceback);
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94 if status then return result; end
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95 log("error", "Error in HTTP server handler: %s", result);
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96 end
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97 if err then
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98 log("debug", "Request error: "..err);
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99 if not callback(nil, err, request) then
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100 destroy_request(request);
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101 end
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102 return;
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103 end
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104
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105 local response = callback(request.method, request.body and t_concat(request.body), request);
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106 if response then
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107 if response == true and not request.destroyed then
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108 -- Keep connection open, we will reply later
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109 log("debug", "Request %s left open, on_destroy is %s", request.id, tostring(request.on_destroy));
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110 elseif response ~= true then
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111 -- Assume response
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112 send_response(request, response);
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113 destroy_request(request);
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114 end
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115 else
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116 log("debug", "Request handler provided no response, destroying request...");
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117 -- No response, close connection
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118 destroy_request(request);
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119 end
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120 end
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121 end
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122
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123 local function request_reader(request, data, startpos)
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124 if not request.parser then
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125 local function success_cb(r)
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126 for k,v in pairs(r) do request[k] = v; end
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127 request.url = url_parse(request.path);
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128 request.url.path = request.url.path and request.url.path:gsub("%%(%x%x)", function(x) return x.char(tonumber(x, 16)) end);
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129 request.body = { request.body };
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130 call_callback(request);
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131 end
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132 local function error_cb(r)
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133 log("error", "Error in HTTP server handler: %s", r or "connection-closed");
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134 call_callback(request, r or "connection-closed");
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135 destroy_request(request);
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136 end
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137 request.parser = httpstream_new(success_cb, error_cb);
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138 end
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139 request.parser:feed(data);
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140 end
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141
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142 -- The default handler for requests
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143 default_handler = function (method, body, request)
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144 log("debug", method.." request for "..tostring(request.path) .. " on port "..request.handler:serverport());
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145 return { status = "404 Not Found",
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146 headers = { ["Content-Type"] = "text/html" },
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147 body = "<html><head><title>Page Not Found</title></head><body>Not here :(</body></html>" };
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148 end
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149
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150
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151 function new_request(handler)
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152 return { handler = handler, conn = handler,
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153 write = function (...) return handler:write(...); end, state = "request",
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154 server = http_servers[handler:serverport()],
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155 send = send_response,
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156 destroy = destroy_request,
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157 id = tostring{}:match("%x+$")
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158 };
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159 end
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160
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161 function destroy_request(request)
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162 log("debug", "Destroying request %s", request.id);
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163 listener = listener or connlisteners_get("httpserver");
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164 if not request.destroyed then
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165 request.destroyed = true;
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166 if request.on_destroy then
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167 log("debug", "Request has destroy callback");
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168 request.on_destroy(request);
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169 else
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170 log("debug", "Request has no destroy callback");
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171 end
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172 request.handler:close()
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173 if request.conn then
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174 listener.ondisconnect(request.conn, "closed");
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175 end
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176 end
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177 end
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178
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179 function new(params)
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180 local http_server = http_servers[params.port];
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181 if not http_server then
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182 http_server = { handlers = {} };
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183 http_servers[params.port] = http_server;
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184 -- We weren't already listening on this port, so start now
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185 connlisteners_start("httpserver", params);
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186 end
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187 if params.base then
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188 http_server.handlers[params.base] = params.handler;
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189 end
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190 end
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191
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192 function set_default_handler(handler)
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193 default_handler = handler;
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194 end
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195
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196 function new_from_config(ports, handle_request, default_options)
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197 if type(handle_request) == "string" then -- COMPAT with old plugins
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198 log("warn", "Old syntax of httpserver.new_from_config being used to register %s", handle_request);
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199 handle_request, default_options = default_options, { base = handle_request };
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200 end
3757
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201 ports = ports or {5280};
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202 for _, options in ipairs(ports) do
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203 local port = default_options.port or 5280;
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204 local base = default_options.base;
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205 local ssl = default_options.ssl or false;
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206 local interface = default_options.interface;
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207 if type(options) == "number" then
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208 port = options;
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209 elseif type(options) == "table" then
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210 port = options.port or port;
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211 base = options.path or base;
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212 ssl = options.ssl or ssl;
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213 interface = options.interface or interface;
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214 elseif type(options) == "string" then
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215 base = options;
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216 end
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217
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diff changeset
218 if ssl then
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219 ssl.mode = "server";
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diff changeset
220 ssl.protocol = "sslv23";
2767
473627393d40 Disable SSLv2 by default, it's known to be insecure.
Paul Aurich <paul@darkrain42.org>
parents: 2761
diff changeset
221 ssl.options = "no_sslv2";
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222 end
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parents: 1522
diff changeset
223
3540
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Waqas Hussain <waqas20@gmail.com>
parents: 3497
diff changeset
224 new{ port = port, interface = interface,
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parents: 3497
diff changeset
225 base = base, handler = handle_request,
2021
43b7c0980d23 net.httpserver: Pass on interface option from new_from_config() (thanks Chris)
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parents: 1868
diff changeset
226 ssl = ssl, type = (ssl and "ssl") or "tcp" };
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diff changeset
227 end
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228 end
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diff changeset
229
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230 _M.request_reader = request_reader;
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231 _M.send_response = send_response;
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232 _M.urlencode = urlencode;
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233
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234 return _M;