local http = require "net.http";
local json = require "util.json";
local st = require "util.stanza";
local xml = require "util.xml";
local unpack = rawget(_G, "unpack") or table.unpack;
local url = module:get_option_string("component_post_url");
assert(url, "Missing required config option 'component_post_url'");
local stanza_kinds = module:get_option_set("post_stanza_types", { "message" });
local http_error_map = {
[0] = { "cancel", "remote-server-timeout", "Connection failure" };
-- 4xx
[400] = { "modify", "bad-request" };
[401] = { "auth", "not-authorized" };
[402] = { "auth", "forbidden", "Payment required" };
[403] = { "auth", "forbidden" };
[404] = { "cancel", "item-not-found" };
[410] = { "cancel", "gone" };
-- 5xx
[500] = { "cancel", "internal-server-error" };
[501] = { "cancel", "feature-not-implemented" };
[502] = { "cancel", "remote-server-timeout", "Bad gateway" };
[503] = { "wait", "remote-server-timeout", "Service temporarily unavailable" };
[504] = { "wait", "remote-server-timeout", "Gateway timeout" };
}
local function error_reply(stanza, code)
local error = http_error_map[code] or { "cancel", "service-unavailable" };
return st.error_reply(stanza, unpack(error, 1, 3));
end
function handle_stanza(event)
local stanza = event.stanza;
local request_body = json.encode({
to = stanza.attr.to;
from = stanza.attr.from;
kind = stanza.name;
body = stanza.name == "message" and stanza:get_child_text("body") or nil;
stanza = tostring(stanza);
});
http.request(url, {
body = request_body;
}, function (response_text, code, response)
if stanza.attr.type == "error" then return; end -- Avoid error loops, don't reply to error stanzas
if code == 200 and response_text and response.headers["content-type"] == "application/json" then
local response_data = json.decode(response_text);
if response_data.stanza then
local reply_stanza = xml.parse(response_data.stanza);
if reply_stanza then
reply_stanza.attr.from, reply_stanza.attr.to = stanza.attr.to, stanza.attr.from;
module:send(reply_stanza);
else
module:log("warn", "Unable to parse reply stanza");
end
else
local stanza_kind = response_data.kind or "message";
local to = response_data.to or stanza.attr.from;
local from = response_data.from or stanza.attr.to;
local reply_stanza = st.stanza(stanza_kind, {
to = to, from = from;
type = response_data.type or (stanza_kind == "message" and "chat") or nil;
});
if stanza_kind == "message" and response_data.body then
reply_stanza:tag("body"):text(tostring(response_data.body)):up();
end
module:log("debug", "Sending %s", tostring(reply_stanza));
module:send(reply_stanza);
end
elseif code >= 200 and code <= 299 then
return;
else
module:send(error_reply(stanza, code));
end
return true;
end);
return true;
end
for stanza_kind in stanza_kinds do
for _, jid_type in ipairs({ "host", "bare", "full" }) do
module:hook(stanza_kind.."/"..jid_type, handle_stanza);
end
end
-- Simple handler for an always-online JID that allows everyone to subscribe to presence
local function default_presence_handler(event)
local stanza = event.stanza;
module:log("debug", "Handling %s", tostring(stanza));
if stanza.attr.type == "probe" then
module:send(st.presence({ to = stanza.attr.from, from = stanza.attr.to.."/default" }));
elseif stanza.attr.type == "subscribe" then
module:send(st.presence({ type = "subscribed", to = stanza.attr.from, from = stanza.attr.to.."/default" }));
module:send(st.presence({ to = stanza.attr.from, from = stanza.attr.to.."/default" }));
elseif stanza.attr.type == "unsubscribe" then
module:send(st.presence({ type = "unavailable", to = stanza.attr.from, from = stanza.attr.to.."/default" }));
end
return true;
end
module:hook("presence/bare", default_presence_handler, -1);