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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local b64 = require "util.encodings".base64.encode;
local url = require "socket.url"
local httpstream_new = require "net.http.parser".new;
local util_http = require "util.http";
local ssl_available = pcall(require, "ssl");
local server = require "net.server"
local t_insert, t_concat = table.insert, table.concat;
local pairs = pairs;
local tonumber, tostring, xpcall, select, traceback =
tonumber, tostring, xpcall, select, debug.traceback;
local assert, error = assert, error
local log = require "util.logger".init("http");
local _ENV = nil;
local requests = {}; -- Open requests
local function make_id(req) return (tostring(req):match("%x+$")); end
local listener = { default_port = 80, default_mode = "*a" };
function listener.onconnect(conn)
local req = requests[conn];
-- Send the request
local request_line = { req.method or "GET", " ", req.path, " HTTP/1.1\r\n" };
if req.query then
t_insert(request_line, 4, "?"..req.query);
end
conn:write(t_concat(request_line));
local t = { [2] = ": ", [4] = "\r\n" };
for k, v in pairs(req.headers) do
t[1], t[3] = k, v;
conn:write(t_concat(t));
end
conn:write("\r\n");
if req.body then
conn:write(req.body);
end
end
function listener.onincoming(conn, data)
local request = requests[conn];
if not request then
log("warn", "Received response from connection %s with no request attached!", tostring(conn));
return;
end
if data and request.reader then
request:reader(data);
end
end
function listener.ondisconnect(conn, err)
local request = requests[conn];
if request and request.conn then
request:reader(nil, err);
end
requests[conn] = nil;
end
function listener.ondetach(conn)
requests[conn] = nil;
end
local function destroy_request(request)
if request.conn then
request.conn = nil;
request.handler:close()
end
end
local function request_reader(request, data, err)
if not request.parser then
local function error_cb(reason)
if request.callback then
request.callback(reason or "connection-closed", 0, request);
request.callback = nil;
end
destroy_request(request);
end
if not data then
error_cb(err);
return;
end
local function success_cb(r)
if request.callback then
request.callback(r.body, r.code, r, request);
request.callback = nil;
end
destroy_request(request);
end
local function options_cb()
return request;
end
request.parser = httpstream_new(success_cb, error_cb, "client", options_cb);
end
request.parser:feed(data);
end
local function handleerr(err) log("error", "Traceback[http]: %s", traceback(tostring(err), 2)); end
local function log_if_failed(id, ret, ...)
if not ret then
log("error", "Request '%s': error in callback: %s", id, tostring((...)));
end
return ...;
end
local function request(u, ex, callback)
local req = url.parse(u);
if not (req and req.host) then
callback(nil, 0, req);
return nil, "invalid-url";
end
if not req.path then
req.path = "/";
end
req.id = ex and ex.id or make_id(req);
local method, headers, body;
local host, port = req.host, req.port;
local host_header = host;
if (port == "80" and req.scheme == "http")
or (port == "443" and req.scheme == "https") then
port = nil;
elseif port then
host_header = host_header..":"..port;
end
headers = {
["Host"] = host_header;
["User-Agent"] = "Prosody XMPP Server";
};
if req.userinfo then
headers["Authorization"] = "Basic "..b64(req.userinfo);
end
if ex then
req.onlystatus = ex.onlystatus;
body = ex.body;
if body then
method = "POST";
headers["Content-Length"] = tostring(#body);
headers["Content-Type"] = "application/x-www-form-urlencoded";
end
if ex.method then method = ex.method; end
if ex.headers then
for k, v in pairs(ex.headers) do
headers[k] = v;
end
end
end
log("debug", "Making %s %s request '%s' to %s", req.scheme:upper(), method or "GET", req.id, (ex and ex.suppress_url and host_header) or u);
-- Attach to request object
req.method, req.headers, req.body = method, headers, body;
local using_https = req.scheme == "https";
if using_https and not ssl_available then
error("SSL not available, unable to contact https URL");
end
local port_number = port and tonumber(port) or (using_https and 443 or 80);
local sslctx = false;
if using_https then
sslctx = ex and ex.sslctx or { mode = "client", protocol = "sslv23", options = { "no_sslv2", "no_sslv3" } };
end
local handler, conn = server.addclient(host, port_number, listener, "*a", sslctx)
if not handler then
callback(nil, 0, req);
return nil, conn;
end
req.handler, req.conn = handler, conn
req.write = function (...) return req.handler:write(...); end
req.callback = function (content, code, request, response)
log("debug", "Request '%s': Calling callback, status %s", req.id, code or "---");
return log_if_failed(req.id, xpcall(function () return callback(content, code, request, response) end, handleerr));
end
req.reader = request_reader;
req.state = "status";
requests[req.handler] = req;
return req;
end
return {
request = request;
-- COMPAT
urlencode = util_http.urlencode;
urldecode = util_http.urldecode;
formencode = util_http.formencode;
formdecode = util_http.formdecode;
};
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