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 =
13 tonumber, tostring, pairs, xpcall, select, debug.traceback;
15 local log = require "util.logger".init("http");
16 local print = function () end
18 local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end });
19 local urlencode = function (s) return s and (s:gsub("%W", function (c) return string.format("%%%02x", c:byte()); end)); end
23 local function expectbody(reqt, code)
24 if reqt.method == "HEAD" then return nil end
25 if code == 204 or code == 304 then return nil end
26 if code >= 100 and code < 200 then return nil end
30 local function request_reader(request, data, startpos)
33 log("debug", "Connection closed, but we have data, calling callback...");
34 request.callback(t_concat(request.body), request.code, request);
35 elseif request.state ~= "completed" then
36 -- Error.. connection was closed prematurely
37 request.callback("connection-closed", 0, request);
39 destroy_request(request);
41 request.state = "completed";
44 if request.state == "body" and request.state ~= "completed" then
45 print("Reading body...")
46 if not request.body then request.body = {}; request.havebodylength, request.bodylength = 0, tonumber(request.responseheaders["content-length"]); end
48 data = data:sub(startpos, -1)
50 t_insert(request.body, data);
51 if request.bodylength then
52 request.havebodylength = request.havebodylength + #data;
53 if request.havebodylength >= request.bodylength then
55 log("debug", "Have full body, calling callback");
56 if request.callback then
57 request.callback(t_concat(request.body), request.code, request);
60 request.state = "completed";
62 print("", "Have "..request.havebodylength.." bytes out of "..request.bodylength);
65 elseif request.state == "headers" then
66 print("Reading headers...")
68 local headers = request.responseheaders or {};
69 for line in data:sub(startpos, -1):gmatch("(.-)\r\n") do
70 startpos = startpos + #line + 2;
71 local k, v = line:match("(%S+): (.+)");
73 headers[k:lower()] = v;
74 print("Header: "..k:lower().." = "..v);
75 elseif #line == 0 then
76 request.responseheaders = headers;
79 print("Unhandled header line: "..line);
82 -- Reached the end of the headers
83 request.state = "body";
84 if #data > startpos then
85 return request_reader(request, data, startpos);
87 elseif request.state == "status" then
88 print("Reading status...")
89 local http, code, text, linelen = data:match("^HTTP/(%S+) (%d+) (.-)\r\n()", startpos);
90 code = tonumber(code);
92 return request.callback("invalid-status-line", 0, request);
95 request.code, request.responseversion = code, http;
97 if request.onlystatus or not expectbody(request, code) then
98 if request.callback then
99 request.callback(nil, code, request);
101 destroy_request(request);
105 request.state = "headers";
107 if #data > linelen then
108 return request_reader(request, data, linelen);
113 local function handleerr(err) log("error", "Traceback[http]: %s: %s", tostring(err), debug_traceback()); end
114 function request(u, ex, callback)
115 local req = url.parse(u);
117 local custom_headers, body;
118 local default_headers = { ["Host"] = req.host, ["User-Agent"] = "Prosody XMPP Server" }
122 default_headers["Authorization"] = "Basic "..mime.b64(req.userinfo);
126 custom_headers = ex.headers;
127 req.onlystatus = ex.onlystatus;
130 req.method = "POST ";
131 default_headers["Content-Length"] = tostring(#body);
132 default_headers["Content-Type"] = "application/x-www-form-urlencoded";
134 if ex.method then req.method = ex.method; end
137 req.handler, req.conn = server.wraptcpclient(listener, socket.tcp(), req.host, req.port or 80, 0, "*a");
138 req.write = req.handler.write;
139 req.conn:settimeout(0);
140 local ok, err = req.conn:connect(req.host, req.port or 80);
141 if not ok and err ~= "timeout" then
145 local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
148 t_insert(request_line, 4, "?");
149 t_insert(request_line, 5, req.query);
152 req.write(t_concat(request_line));
153 local t = { [2] = ": ", [4] = "\r\n" };
154 if custom_headers then
155 for k, v in pairs(custom_headers) do
157 req.write(t_concat(t));
158 default_headers[k] = nil;
162 for k, v in pairs(default_headers) do
164 req.write(t_concat(t));
165 default_headers[k] = nil;
173 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
174 req.reader = request_reader;
175 req.state = "status";
177 listener.register_request(req.handler, req);
182 function destroy_request(request)
184 request.handler.close()
185 listener.disconnect(request.conn, "closed");
189 _M.urlencode = urlencode;