2 -- Copyright (C) 2008-2009 Matthew Wild
3 -- Copyright (C) 2008-2009 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
10 local socket = require "socket"
11 local server = require "net.server"
12 local url_parse = require "socket.url".parse;
14 local connlisteners_start = require "net.connlisteners".start;
15 local connlisteners_get = require "net.connlisteners".get;
18 local t_insert, t_concat = table.insert, table.concat;
19 local s_match, s_gmatch = string.match, string.gmatch;
20 local tonumber, tostring, pairs, ipairs, type = tonumber, tostring, pairs, ipairs, type;
22 local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%02x", c:byte()); end)); end
24 local log = require "util.logger".init("httpserver");
26 -- TODO: Should we read this from /etc/mime.types if it exists? (startup time...?)
27 local mime_map = { html = "text/html", txt = "plain/text; charset=utf-8", js = "text/javascript" };
29 local http_servers = {};
33 local default_handler;
35 local function expectbody(reqt)
36 return reqt.method == "POST";
39 local function send_response(request, response)
43 local body = tostring(response.body);
44 log("debug", "Sending response to %s", request.id);
45 resp = { "HTTP/1.0 ", response.status or "200 OK", "\r\n"};
46 local h = response.headers;
48 for k, v in pairs(h) do
52 t_insert(resp, "\r\n");
55 if not (h and h["Content-Length"]) then
56 t_insert(resp, "Content-Length: ");
57 t_insert(resp, #body);
58 t_insert(resp, "\r\n");
60 t_insert(resp, "\r\n");
62 if request.method ~= "HEAD" then
66 -- Response we have is just a string (the body)
67 log("debug", "Sending 200 response to %s", request.id or "<none>");
69 resp = { "HTTP/1.0 200 OK\r\n" };
70 t_insert(resp, "Connection: close\r\n");
71 t_insert(resp, "Content-Type: ");
72 t_insert(resp, mime_map[request.url.path:match("%.(%w+)")] or "application/octet-stream");
73 t_insert(resp, "\r\n");
74 t_insert(resp, "Content-Length: ");
75 t_insert(resp, #response);
76 t_insert(resp, "\r\n\r\n");
78 t_insert(resp, response);
80 request.write(t_concat(resp));
81 if not request.stayopen then
86 local function call_callback(request, err)
87 if request.handled then return; end
88 request.handled = true;
89 local callback = request.callback;
90 if not callback and request.path then
91 local path = request.url.path;
92 local base = path:match("^/([^/?]+)");
94 base = path:match("^http://[^/?]+/([^/?]+)");
97 callback = (request.server and request.server.handlers[base]) or default_handler;
101 log("debug", "Request error: "..err);
102 if not callback(nil, err, request) then
103 destroy_request(request);
108 local response = callback(request.method, request.body and t_concat(request.body), request);
110 if response == true and not request.destroyed then
111 -- Keep connection open, we will reply later
112 log("debug", "Request %s left open, on_destroy is %s", request.id, tostring(request.on_destroy));
113 elseif response ~= true then
115 send_response(request, response);
116 destroy_request(request);
119 log("debug", "Request handler provided no response, destroying request...");
120 -- No response, close connection
121 destroy_request(request);
126 local function request_reader(request, data, startpos)
129 call_callback(request);
131 -- Error.. connection was closed prematurely
132 call_callback(request, "connection-closed");
134 -- Here we force a destroy... the connection is gone, so we can't reply later
135 destroy_request(request);
138 if request.state == "body" then
139 log("debug", "Reading body...")
140 if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.headers["content-length"]); end
142 data = data:sub(startpos, -1)
144 t_insert(request.body, data);
145 if request.bodylength then
146 request.havebodylength = request.havebodylength + #data;
147 if request.havebodylength >= request.bodylength then
149 call_callback(request);
152 elseif request.state == "headers" then
153 log("debug", "Reading headers...")
154 local pos = startpos;
155 local headers = request.headers or {};
156 for line in data:gmatch("(.-)\r\n") do
157 startpos = (startpos or 1) + #line + 2;
158 local k, v = line:match("(%S+): (.+)");
160 headers[k:lower()] = v;
161 -- log("debug", "Header: "..k:lower().." = "..v);
162 elseif #line == 0 then
163 request.headers = headers;
166 log("debug", "Unhandled header line: "..line);
170 if not expectbody(request) then
171 call_callback(request);
175 -- Reached the end of the headers
176 request.state = "body";
177 if #data > startpos then
178 return request_reader(request, data:sub(startpos, -1));
180 elseif request.state == "request" then
181 log("debug", "Reading request line...")
182 local method, path, http, linelen = data:match("^(%S+) (%S+) HTTP/(%S+)\r\n()", startpos);
184 return call_callback(request, "invalid-status-line");
187 request.method, request.path, request.httpversion = method, path, http;
189 request.url = url_parse(request.path);
191 log("debug", method.." request for "..tostring(request.path) .. " on port "..request.handler.serverport());
193 if request.onlystatus then
194 if not call_callback(request) then
199 request.state = "headers";
201 if #data > linelen then
202 return request_reader(request, data:sub(linelen, -1));
207 -- The default handler for requests
208 default_handler = function (method, body, request)
209 log("debug", method.." request for "..tostring(request.path) .. " on port "..request.handler.serverport());
210 return { status = "404 Not Found",
211 headers = { ["Content-Type"] = "text/html" },
212 body = "<html><head><title>Page Not Found</title></head><body>Not here :(</body></html>" };
216 function new_request(handler)
217 return { handler = handler, conn = handler.socket,
218 write = function (...) return handler:write(...); end, state = "request",
219 server = http_servers[handler:serverport()],
220 send = send_response,
221 destroy = destroy_request,
222 id = tostring{}:match("%x+$")
226 function destroy_request(request)
227 log("debug", "Destroying request %s", request.id);
228 listener = listener or connlisteners_get("httpserver");
229 if not request.destroyed then
230 request.destroyed = true;
231 if request.on_destroy then
232 log("debug", "Request has destroy callback");
233 request.on_destroy(request);
235 log("debug", "Request has no destroy callback");
237 request.handler.close()
239 listener.ondisconnect(request.handler, "closed");
245 local http_server = http_servers[params.port];
246 if not http_server then
247 http_server = { handlers = {} };
248 http_servers[params.port] = http_server;
249 -- We weren't already listening on this port, so start now
250 connlisteners_start("httpserver", params);
253 http_server.handlers[params.base] = params.handler;
257 function set_default_handler(handler)
258 default_handler = handler;
261 function new_from_config(ports, handle_request, default_options)
262 if type(handle_request) == "string" then -- COMPAT with old plugins
263 log("warn", "Old syntax of httpserver.new_from_config being used to register %s", handle_request);
264 handle_request, default_options = default_options, { base = handle_request };
266 for _, options in ipairs(ports) do
267 local port = default_options.port or 5280;
268 local base = default_options.base;
269 local ssl = default_options.ssl or false;
270 local interface = default_options.interface;
271 if type(options) == "number" then
273 elseif type(options) == "table" then
274 port = options.port or port;
275 base = options.path or base;
276 ssl = options.ssl or ssl;
277 interface = options.interface or interface;
278 elseif type(options) == "string" then
284 ssl.protocol = "sslv23";
287 new{ port = port, interface = interface,
288 base = base, handler = handle_request,
289 ssl = ssl, type = (ssl and "ssl") or "tcp" };
293 _M.request_reader = request_reader;
294 _M.send_response = send_response;
295 _M.urlencode = urlencode;