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)

-- Copyright (C) 2021 Kim Alvefur
--
-- This file is MIT licensed. Please see the
-- COPYING file in the source package for more information.
--

local http = require "net.http";
local async = require "util.async";
local uh = require "util.http";
local jid = require "util.jid";
local json = require "util.json";
local st = require "util.stanza";

local funcs = {jid_bare = jid.bare; jid_host = jid.host; jid_node = jid.node};
local render = require"util.interpolation".new("%b{}", uh.urlencode, funcs);

module:depends"muc";

local url_template = assert(module:get_option_string("muc_create_api_url", nil), "'muc_create_api_url' is a required option");
local apiauth = module:get_option_string("muc_create_api_auth", nil);

local ex = {
	headers = {
		accept = "application/json";
		authorization = apiauth;
	}
};

local problems = {
		format = "API server returned invalid data, see logs",
		config = "A problem occured while creating the room, see logs",
};

local function apply_config(room, settings)
	local affiliations = settings.affiliations;
	if type(affiliations) == "table" then

		-- COMPAT the room creator is unconditionally made 'owner'
		-- clear existing affiliation
		for existing_affiliation in pairs(room._affiliations) do
			room:set_affiliation(true, existing_affiliation, "none");
		end

		if affiliations[1] ~= nil then -- array of ( jid, affiliation, nick )
			for _, aff in ipairs(affiliations) do
				if type(aff) == "table" and type(aff.jid) == "string" and (aff.nick == nil or type(aff.nick) == "string") then
					local prepped_jid = jid.prep(aff.jid);
					if prepped_jid then
						local ok, err = room:set_affiliation(true, prepped_jid, aff.affiliation, aff.nick and { nick = aff.nick });
						if not ok then
							module:log("error", "Could not set affiliation in %s: %s", room.jid, err);
							return nil, "config";
						end
					else
						module:log("error", "Invalid JID returned from API for %s: %q", room.jid, aff.jid);
						return nil, "format";
					end
				else
					module:log("error", "Invalid affiliation item returned from API for %s: %q", room.jid, aff);
					return nil, "format";
				end
			end
		else -- map of jid : affiliation
			for user_jid, aff in pairs(affiliations) do
				if type(user_jid) == "string" and type(aff) == "string" then
					local prepped_jid = jid.prep(user_jid);
					if prepped_jid then
						local ok, err = room:set_affiliation(true, prepped_jid, aff);
						if not ok then
							module:log("error", "Could not set affiliation in %s: %s", room.jid, err);
							return nil, "config";
						end
					else
						module:log("error", "Invalid JID returned from API: %q", aff.jid);
						return nil, "format";
					end
				end
			end
		end
	elseif affiliations ~= nil then
		module:log("error", "Invalid affiliations returned from API for %s: %q", room.jid, affiliations);
		return nil, "format", { field = "affiliations" };
	end

	local config = settings.config;
	if type(config) == "table" then
		-- TODO reject invalid fields instead of ignoring them
		if type(config.name) == "string" then room:set_name(config.name); end
		if type(config.description) == "string" then room:set_description(config.description); end
		if type(config.language) == "string" then room:set_language(config.language); end
		if type(config.password) == "string" then room:set_password(config.password); end
		if type(config.subject) == "string" then room:set_subject(room.jid, config.subject); end

		if type(config.public) == "boolean" then room:set_public(config.public); end
		if type(config.members_only) == "boolean" then room:set_members_only(config.members_only); end
		if type(config.allow_member_invites) == "boolean" then room:set_allow_member_invites(config.allow_member_invites); end
		if type(config.moderated) == "boolean" then room:set_moderated(config.moderated); end
		if type(config.persistent) == "boolean" then room:set_persistent(config.persistent); end
		if type(config.changesubject) == "boolean" then room:set_changesubject(config.changesubject); end

		if type(config.historylength) == "number" then room:set_historylength(config.historylength); end
		if type(config.public_jids) == "boolean" then room:set_whois(config.public_jids and "anyone" or "moderators"); end
		-- Leaving out presence_broadcast for now

		-- mod_muc_mam
		if type(config.archiving) == "boolean" then room._config.archiving = config.archiving; end
	elseif config ~= nil then
		module:log("error", "Invalid config returned from API for %s: %q", room.jid, config);
		return nil, "format", { field = "config" };
	end
	return true;
end

module:hook("muc-room-pre-create", function(event)
	local url = render(url_template, event);
	module:log("debug", "Calling API at %q for room %s", url, event.room.jid);
	local wait, done = async.waiter();

	local ret, err;
	http.request(url, ex, function (body, code)
		if math.floor(code / 100) == 2 then
			local parsed, parse_err = json.decode(body);
			if not parsed then
				module:log("debug", "Got invalid JSON from %s: %s", url, parse_err);
				err = problems.format;
			else
				ret = parsed;
			end
		else
			module:log("debug", "Rejected by API: ", body);
			err = "Rejected by API";
		end

		done()
	end);

	wait();
	if not ret then
		event.room:destroy();
		event.origin.send(st.error_reply(event.stanza, "cancel", "internal-server-error", err, module.host));
		return true;
	end

	local configured, err = apply_config(event.room, ret);
	if not configured then
		event.room:destroy();
		event.origin.send(st.error_reply(event.stanza, "cancel", "internal-server-error", err, event.room.jid or module.host));
		return true;
	end
end, -2);