mod_voipms: New Module to send and receive SMS/MMS via VoIP.ms APIs. diff --git a/mod_voipms/README.md b/mod_voipms/README.md new file mode 100644 --- /dev/null +++ b/mod_voipms/README.md @@ -0,0 +1,51 @@ +--- +labels: +- 'Stage-Alpha' +- 'Type-Web' +summary: Send and receive SMS/MMS via VoIP.ms APIs. +rockspec: + build: + modules: + mod_voipms: mod_voipms.lua +... + +Introduction +============ + +This is a Prosody module to map JIDs to DIDs on VoIP.ms and support sending/receiving SMS/MMS. + +Configuration +============= + +| option | type | default | +|-----------------------|--------|---------| +| voipms\_api\_username | string | nil | +| voipms\_api\_password | string | nil | +| voipms\_query\_key | string | nil | +| voipms\_jid\_map | table | nil | +``` +VirtualHost "sms.example.com" +modules_enabled = { + "voipms"; +} +voipms_api_username = john@example.com -- E-mail registered with VoIP.ms +voipms_api_password = abcd1234 -- API password configured in VoIP.ms +voipms_query_key = some_query_key -- query param 'key' part of your URL callback +voipms_jid_map = { + ["your_jid@your_domain.com"] = "+1234567890" +} +``` + +HTTP +==== + +The module is served on Prosody's default HTTP ports at the path /voipms. More details on configuring HTTP modules in Prosody can be found in the HTTP documentation. + +VoIP.ms Webhook URL +=================== + +This module receives the VoIP.ms Webhook URL (POST) at the /voipms endpoint. It uses the sendSMS/sendMMS GET methods against the VoIP.ms APIs. This is an example webhook to use in VoIP.ms: + +``` +https://sms.example.com/voipms?key=some_query_key +``` diff --git a/mod_voipms/mod_voipms.lua b/mod_voipms/mod_voipms.lua new file mode 100644 --- /dev/null +++ b/mod_voipms/mod_voipms.lua @@ -0,0 +1,166 @@ +local http = require "net.http" +local json = require "util.json" +local st = require "util.stanza" + +local api_username = module:get_option_string("voipms_api_username") +local api_password = module:get_option_string("voipms_api_password") +local query_key = module:get_option("voipms_query_key") +local jid_map = module:get_option("voipms_jid_map") or {} +local rest_endpoint = "https://voip.ms/api/v1/rest.php" + +if not api_username or not api_password or not query_key then + module:log("error", "Missing required config values (voipms_api_username, voipms_api_password, voipms_query_key)") + return +end + +module:depends("http") + +local function normalize_number(num) + if not num then return nil end + if num:sub(1, 1) ~= "+" then + return "+1" .. num + end + return num +end + +local function extract_query_key(event) + return (event.request.url.query or ""):match("key=([^&]+)") +end + +module:provides("http", { + route = { + ["POST"] = function(event) + local req = event.request + local body = req.body or "" + + if extract_query_key(event) ~= query_key then + module:log("warn", "Unauthorized webhook: missing or invalid key") + return { status_code = 403 } + end + + local json_payload, err = json.decode(body) + if not json_payload then + module:log("warn", "Invalid JSON: %s", err or "unknown error") + return { status_code = 400 } + end + + local payload = json_payload.data and json_payload.data.payload + if not payload then + module:log("warn", "Missing payload in JSON") + return { status_code = 400 } + end + + local from = payload.from and payload.from.phone_number + local to_list = payload.to or {} + local to = #to_list > 0 and to_list[1].phone_number or nil + + if not from or not to then + module:log("warn", "Missing phone numbers (from: %s, to: %s)", tostring(from), tostring(to)) + return { status_code = 400 } + end + + local normalized_to = normalize_number(to) + local target_jid = nil + + for jid, did in pairs(jid_map) do + if normalize_number(did) == normalized_to then + target_jid = jid + break + end + end + + if not target_jid then + module:log("warn", "No JID mapping for DID %s", normalized_to) + return { status_code = 404 } + end + + local normalized_from = normalize_number(from) + local message_text = payload.text or "" + + local message = st.message({ + from = normalized_from .. "@" .. module.host, + to = target_jid, + type = "chat" + }):tag("body"):text(message_text):up() + + if payload.media and #payload.media > 0 then + for _, media_item in ipairs(payload.media) do + if media_item.url then + message_text = message_text .. "\n" .. media_item.url + message:tag("x", { xmlns = "jabber:x:oob" }) + :tag("url"):text(media_item.url):up():up() + end + end + end + + module:send(message) + module:log("info", "Delivered SMS from %s to %s", normalized_from, target_jid) + + return { status_code = 204 } + end + } +}) + +module:hook("message/bare", function(event) + local stanza = event.stanza + if stanza.attr.type ~= "chat" then return end + + local from_jid = stanza.attr.from + local to_jid = stanza.attr.to + local body = stanza:get_child_text("body") + if not body or body == "" then return end + + local from_number = jid_map[from_jid] + if not from_number then + module:log("warn", "No DID mapping for JID %s", from_jid) + return + end + + local to_number = to_jid:match("^([^@]+)") + if not to_number then + module:log("warn", "Malformed JID in message.to: %s", to_jid) + return + end + + to_number = normalize_number(to_number) + + local media_urls = {} + for line in body:gmatch("[^\r\n]+") do + if line:match("^https?://") then + table.insert(media_urls, line) + end + end + + local method = (#media_urls > 0) and "sendMMS" or "sendSMS" + local query = { + api_username = api_username, + api_password = api_password, + method = method, + did = from_number, + dst = to_number, + message = body + } + + if method == "sendMMS" then + for i, url in ipairs(media_urls) do + query["media_url[" .. (i - 1) .. "]"] = url + end + end + + local query_str = http.formencode(query) + + http.request(rest_endpoint .. "?" .. query_str, { + method = "GET"; + }, function(response_body, code) + if code == 200 then + local resp, err = json.decode(response_body) + if not resp or resp.status ~= "success" then + module:log("error", "Failed to send %s: %s", method, err or (resp and resp.status) or "unknown") + else + module:log("info", "Sent %s from %s to %s", method, from_number, to_number) + end + else + module:log("error", "HTTP error sending %s: code %s", method, tostring(code)) + end + end) +end)

local id = require "util.id";
local st = require "util.stanza";
local uuid = require "util.uuid";
local mt = require "util.multitable";
local cache = require "util.cache";

local xmlns_pubsub = "http://jabber.org/protocol/pubsub";
local xmlns_pubsub_event = "http://jabber.org/protocol/pubsub#event";

-- TODO persist
-- TODO query known pubsub nodes to sync current subscriptions
-- TODO subscription ids per 'item' would be handy

local pending_subscription = cache.new(256); -- uuid → node
local pending_unsubscription = cache.new(256); -- uuid → node
local active_subscriptions = mt.new() -- service | node | subscriber | uuid | { item }
function module.save()
	return { active_subscriptions = active_subscriptions.data }
end
function module.restore(data)
	if data and data.active_subscriptions then
		active_subscriptions.data = data.active_subscriptions
	end
end

local valid_events = {"subscribed"; "unsubscribed"; "error"; "item"; "retract"; "purge"; "delete"}

local function subscription_added(item_event)
	local item = item_event.item;
	assert(item.service, "pubsub subscription item MUST have a 'service' field.");
	assert(item.node, "pubsub subscription item MUST have a 'node' field.");
	item.from = item.from or module.host;

	local already_subscibed = false;
	for _ in active_subscriptions:iter(item.service, item.node, item.from, nil) do -- luacheck: ignore 512
		already_subscibed = true;
		break
	end

	item._id = uuid.generate();
	local iq_id = "pubsub-sub-"..id.short();
	pending_subscription:set(iq_id, item._id);
	active_subscriptions:set(item.service, item.node, item.from, item._id, item);

	if not already_subscibed then
		module:send(st.iq({ type = "set", id = iq_id, from = item.from, to = item.service })
			:tag("pubsub", { xmlns = xmlns_pubsub })
				:tag("subscribe", { jid = item.from, node = item.node }));
	end
end

for _, event_name in ipairs(valid_events) do
	module:hook("pubsub-event/host/"..event_name, function (event)
		for _, _, _, _, _, cb in active_subscriptions:iter(event.service, event.node, event.stanza.attr.to, nil, "on_"..event_name) do
			event.handled = true;
			pcall(cb, event);
		end
	end);

	module:hook("pubsub-event/bare/"..event_name, function (event)
		for _, _, _, _, _, cb in active_subscriptions:iter(event.service, event.node, event.stanza.attr.to, nil, "on_"..event_name) do
			event.handled = true;
			pcall(cb, event);
		end
	end);
end

function handle_iq(context, event)
	local stanza = event.stanza;
	local service = stanza.attr.from;

	if not stanza.attr.id then return end -- shouldn't be possible
	if not stanza.attr.id:match("^pubsub%-sub%-") then return end

	local subscribed_node = pending_subscription:get(stanza.attr.id);
	pending_subscription:set(stanza.attr.id, nil);
	local unsubscribed_node = pending_unsubscription:get(stanza.attr.id);
	pending_unsubscription:set(stanza.attr.id, nil);

	if stanza.attr.type == "result" then
		local pubsub_wrapper = stanza:get_child("pubsub", xmlns_pubsub);
		local subscription = pubsub_wrapper and pubsub_wrapper:get_child("subscription");
		if not subscription then return end
		local node = subscription.attr.node;

		local what;
		if subscription.attr.subscription == "subscribed" then
			what = "on_subscribed";
		elseif subscription.attr.subscription == "none" then
			what = "on_unsubscribed";
		end
		if not what then return end -- there are other states but we don't handle them
		for _, _, _, _, _, cb in active_subscriptions:iter(service, node, stanza.attr.to, nil, what) do
			cb(event);
		end
		return true;

	elseif stanza.attr.type == "error" then
		local node = subscribed_node or unsubscribed_node;
		local error_type, error_condition, reason, pubsub_error = stanza:get_error();
		local err = { type = error_type, condition = error_condition, text = reason, extra = pubsub_error };
		if active_subscriptions:get(service) then
			for _, _, _, _, _, cb in active_subscriptions:iter(service, node, stanza.attr.to, nil, "on_error") do
				cb(err);
			end
			return true;
		end
	end
end

module:hook("iq/host", function (event)
	handle_iq("host", event);
end, 1);

module:hook("iq/bare", function (event)
	handle_iq("bare", event);
end, 1);

local function subscription_removed(item_event)
	local item = item_event.item;
	active_subscriptions:set(item.service, item.node, item.from, item._id, nil);
	local node_subs = active_subscriptions:get(item.service, item.node, item.from);
	if node_subs and next(node_subs) then return end

	local iq_id = "pubsub-sub-"..id.short();
	pending_unsubscription:set(iq_id, item._id);

	module:send(st.iq({ type = "set", id = iq_id, from = item.from, to = item.service })
		:tag("pubsub", { xmlns = xmlns_pubsub })
			:tag("unsubscribe", { jid = item.from, node = item.node }))
end

module:handle_items("pubsub-subscription", subscription_added, subscription_removed, true);

function handle_message(context, event)
	local origin, stanza = event.origin, event.stanza;
	local handled = nil;
	local service = stanza.attr.from;
	module:log("debug", "Got message/%s: %s", context, stanza:top_tag());
	for event_container in stanza:childtags("event", xmlns_pubsub_event) do
		for pubsub_event in event_container:childtags() do
			module:log("debug", "Got pubsub event %s", pubsub_event:top_tag());
			local node = pubsub_event.attr.node;
			local event_data = {
				stanza = stanza;
				origin = origin;
				event = pubsub_event;
				service = service;
				node = node;
				handled = false;
			};
			module:fire_event("pubsub-event/" .. context .. "/"..pubsub_event.name, event_data);
			if not handled and event_data.handled then
				handled = true;
			end
		end
	end
	-- If not addressed to the host, let it fall through to normal handling
	-- (it may be on its way to a local client), otherwise, we'll mark the
	-- event as handled to suppress an error response if we handled it.
	if context == "host" and handled then
		return true;
	end
end

module:hook("message/host", function(event)
	return handle_message("host", event);
end);

module:hook("message/bare", function(event)
	return handle_message("bare", event);
end);


function handle_items(context, event)
	for item in event.event:childtags() do
		module:log("debug", "Got pubsub item event %s", item:top_tag());
		event.item = item;
		event.payload = item.tags[1];
		module:fire_event("pubsub-event/" .. context .. "/"..item.name, event);
	end
end

module:hook("pubsub-event/host/items", function (event)
	handle_items("host", event);
end);

module:hook("pubsub-event/bare/items", function (event)
	handle_items("bare", event);
end);