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-- Prosody IM v0.3
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
module.host = "*" -- Global module
local httpserver = require "net.httpserver";
local st = require "util.stanza";
local pcall = pcall;
local unpack = unpack;
local tostring = tostring;
local is_admin = require "core.usermanager".is_admin;
local jid_split = require "util.jid".split;
local b64_decode = require "util.encodings".base64.decode;
local get_method = require "core.objectmanager".get_object;
local validate_credentials = require "core.usermanager".validate_credentials;
local translate_request = require "util.xmlrpc".translate_request;
local create_response = require "util.xmlrpc".create_response;
local create_error_response = require "util.xmlrpc".create_error_response;
local entity_map = setmetatable({
["amp"] = "&";
["gt"] = ">";
["lt"] = "<";
["apos"] = "'";
["quot"] = "\"";
}, {__index = function(_, s)
if s:sub(1,1) == "#" then
if s:sub(2,2) == "x" then
return string.char(tonumber(s:sub(3), 16));
else
return string.char(tonumber(s:sub(2)));
end
end
end
});
local function xml_unescape(str)
return (str:gsub("&(.-);", entity_map));
end
local function parse_xml(xml)
local stanza = st.stanza("root");
local regexp = "<([^>]*)>([^<]*)";
for elem, text in xml:gmatch(regexp) do
--print("[<"..elem..">|"..text.."]");
if elem:sub(1,1) == "!" or elem:sub(1,1) == "?" then -- neglect comments and processing-instructions
elseif elem:sub(1,1) == "/" then -- end tag
elem = elem:sub(2);
stanza:up(); -- TODO check for start-end tag name match
elseif elem:sub(-1,-1) == "/" then -- empty tag
elem = elem:sub(1,-2);
stanza:tag(elem):up();
else -- start tag
stanza:tag(elem);
end
if #text ~= 0 then -- text
stanza:text(xml_unescape(text));
end
end
return stanza.tags[1];
end
local function handle_xmlrpc_request(method, args)
method = get_method(method);
if not method then return create_error_response(404, "method not found"); end
args = args or {};
local success, result = pcall(method, unpack(args));
if success then
success, result = pcall(create_response, result or "nil");
if success then
return result;
end
return create_error_response(500, "Error in creating response: "..result);
end
return create_error_response(0, result or "nil");
end
local function handle_xmpp_request(origin, stanza)
local query = stanza.tags[1];
if query.name == "query" then
if #query.tags == 1 then
if is_admin(stanza.attr.from) then
local success, method, args = pcall(translate_request, query.tags[1]);
if success then
local result = handle_xmlrpc_request(method, args);
origin.send(st.reply(stanza):tag('query', {xmlns='jabber:iq:rpc'}):add_child(result));
else
origin.send(st.error_reply(stanza, "modify", "bad-request", method));
end
else origin.send(st.error_reply(stanza, "auth", "forbidden", "No content in XML-RPC request")); end
else origin.send(st.error_reply(stanza, "modify", "bad-request", "No content in XML-RPC request")); end
else origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); end
end
module:add_iq_handler({"c2s", "s2sin"}, "jabber:iq:rpc", handle_xmpp_request);
module:add_feature("jabber:iq:rpc");
-- TODO add <identity category='automation' type='rpc'/> to disco replies
local default_headers = { ['Content-Type'] = 'text/xml' };
local unauthorized_response = { status = '401 UNAUTHORIZED', headers = {['Content-Type']='text/html', ['WWW-Authenticate']='Basic realm="WallyWorld"'}; body = "<html><body>Authentication required</body></html>"; };
local function handle_http_request(method, body, request)
-- authenticate user
local username, password = b64_decode(request['authorization'] or ''):gmatch('([^:]*):(.*)')(); -- TODO digest auth
local node, host = jid_split(username);
if not validate_credentials(host, node, password) and is_admin(username) then
return unauthorized_response;
end
-- parse request
local stanza = body and parse_xml(body);
if (not stanza) or request.method ~= "POST" then
return "<html><body>You really don't look like an XML-RPC client to me... what do you want?</body></html>";
end
-- execute request
local success, method, args = pcall(translate_request, stanza);
if success then
return { headers = default_headers; body = tostring(handle_xmlrpc_request(method, args)) };
end
return "<html><body>Error parsing XML-RPC request: "..tostring(method).."</body></html>";
end
httpserver.new{ port = 9000, base = "xmlrpc", handler = handle_http_request }
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