2 local socket = require "socket"
3 local mime = require "mime"
4 local url = require "socket.url"
6 local server = require "net.server"
8 local connlisteners_get = require "net.connlisteners".get;
9 local listener = connlisteners_get("httpclient") or error("No httpclient listener!");
11 local t_insert, t_concat = table.insert, table.concat;
12 local tonumber, tostring, pairs, xpcall, select, debug_traceback, char =
13 tonumber, tostring, pairs, xpcall, select, debug.traceback, string.char;
15 local log = require "util.logger".init("http");
16 local print = function () end
18 local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%02x", c:byte()); end)); end
22 local function expectbody(reqt, code)
23 if reqt.method == "HEAD" then return nil end
24 if code == 204 or code == 304 then return nil end
25 if code >= 100 and code < 200 then return nil end
29 local function request_reader(request, data, startpos)
32 log("debug", "Connection closed, but we have data, calling callback...");
33 request.callback(t_concat(request.body), request.code, request);
34 elseif request.state ~= "completed" then
35 -- Error.. connection was closed prematurely
36 request.callback("connection-closed", 0, request);
38 destroy_request(request);
40 request.state = "completed";
43 if request.state == "body" and request.state ~= "completed" then
44 print("Reading body...")
45 if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.responseheaders["content-length"]); end
47 data = data:sub(startpos, -1)
49 t_insert(request.body, data);
50 if request.bodylength then
51 request.havebodylength = request.havebodylength + #data;
52 if request.havebodylength >= request.bodylength then
54 log("debug", "Have full body, calling callback");
55 if request.callback then
56 request.callback(t_concat(request.body), request.code, request);
59 request.state = "completed";
61 print("", "Have "..request.havebodylength.." bytes out of "..request.bodylength);
64 elseif request.state == "headers" then
65 print("Reading headers...")
67 local headers = request.responseheaders or {};
68 for line in data:sub(startpos, -1):gmatch("(.-)\r\n") do
69 startpos = startpos + #line + 2;
70 local k, v = line:match("(%S+): (.+)");
72 headers[k:lower()] = v;
73 print("Header: "..k:lower().." = "..v);
74 elseif #line == 0 then
75 request.responseheaders = headers;
78 print("Unhandled header line: "..line);
81 -- Reached the end of the headers
82 request.state = "body";
83 if #data > startpos then
84 return request_reader(request, data, startpos);
86 elseif request.state == "status" then
87 print("Reading status...")
88 local http, code, text, linelen = data:match("^HTTP/(%S+) (%d+) (.-)\r\n()", startpos);
89 code = tonumber(code);
91 return request.callback("invalid-status-line", 0, request);
94 request.code, request.responseversion = code, http;
96 if request.onlystatus or not expectbody(request, code) then
97 if request.callback then
98 request.callback(nil, code, request);
100 destroy_request(request);
104 request.state = "headers";
106 if #data > linelen then
107 return request_reader(request, data, linelen);
112 local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end
113 function request(u, ex, callback)
114 local req = url.parse(u);
116 if not (req and req.host) then
117 callback(nil, 0, req);
118 return nil, "invalid-url";
125 local custom_headers, body;
126 local default_headers = { ["Host"] = req.host, ["User-Agent"] = "Prosody XMPP Server" }
130 default_headers["Authorization"] = "Basic "..mime.b64(req.userinfo);
134 custom_headers = ex.headers;
135 req.onlystatus = ex.onlystatus;
138 req.method = "POST ";
139 default_headers["Content-Length"] = tostring(#body);
140 default_headers["Content-Type"] = "application/x-www-form-urlencoded";
142 if ex.method then req.method = ex.method; end
145 req.handler, req.conn = server.wrapclient(socket.tcp(), req.host, req.port or 80, listener, "*a");
146 req.write = req.handler.write;
147 req.conn:settimeout(0);
148 local ok, err = req.conn:connect(req.host, req.port or 80);
149 if not ok and err ~= "timeout" then
150 callback(nil, 0, req);
154 local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
157 t_insert(request_line, 4, "?");
158 t_insert(request_line, 5, req.query);
161 req.write(t_concat(request_line));
162 local t = { [2] = ": ", [4] = "\r\n" };
163 if custom_headers then
164 for k, v in pairs(custom_headers) do
166 req.write(t_concat(t));
167 default_headers[k] = nil;
171 for k, v in pairs(default_headers) do
173 req.write(t_concat(t));
174 default_headers[k] = nil;
182 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
183 req.reader = request_reader;
184 req.state = "status";
186 listener.register_request(req.handler, req);
191 function destroy_request(request)
193 request.handler.close()
194 listener.disconnect(request.conn, "closed");
198 _M.urlencode = urlencode;