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)

module:depends("http");

local st = require "util.stanza";
local json = require "util.json";
local hashes = require "util.hashes";
local from_hex = require "util.hex".from;
local hmacs = {
	sha1 = hashes.hmac_sha1;
	sha256 = hashes.hmac_sha256;
	sha384 = hashes.hmac_sha384;
	sha512 = hashes.hmac_sha512;
};

local pubsub_service = module:depends("pubsub").service;

-- configuration
local default_node = module:get_option("github_node", "github");
local node_prefix = module:get_option_string("github_node_prefix", "github/");
local node_mapping = module:get_option_string("github_node_mapping");
local github_actor = module:get_option_string("github_actor") or true;
local github_secret = module:get_option("github_secret");

-- validation
assert(github_secret, "Please set 'github_secret'");

local error_mapping = {
	["forbidden"] = 403;
	["item-not-found"] = 404;
	["internal-server-error"] = 500;
	["conflict"] = 409;
};

local function verify_signature(secret, body, signature)
	if not signature then return false; end
	local algo, digest = signature:match("^([^=]+)=(%x+)");
	if not algo then return false; end
	local hmac = hmacs[algo];
	if not algo then return false; end
	return hmac(secret, body) == from_hex(digest);
end

function handle_POST(event)
	local request, response = event.request, event.response;

	if not verify_signature(github_secret, request.body, request.headers.x_hub_signature) then
		module:log("debug", "Signature validation failed");
		return 401;
	end

	local data = json.decode(request.body);
	if not data then
		response.status_code = 400;
		return "Invalid JSON. From you of all people...";
	end

	local node = default_node;
	if node_mapping then
		node = node_prefix .. data.repository[node_mapping];
	end

	local github_event = request.headers.x_github_event or data.object_kind;
	if not github_event and data.commits then
		github_event = "push"; -- curl?
	end
	module:log("debug", "Handling '%s' event: \n%s\n", github_event, tostring(request.body));

	if github_event == "push" then

		for _, commit in ipairs(data.commits) do
			local ok, err = pubsub_service:publish(node, github_actor, commit.id,
				st.stanza("item", { id = commit.id, xmlns = "http://jabber.org/protocol/pubsub" })
				:tag("entry", { xmlns = "http://www.w3.org/2005/Atom" })
					:tag("id"):text(commit.id):up()
					:tag("title"):text(commit.message:match("^[^\r\n]*")):up()
					:tag("summary"):text(("Commit to %s by %s: %s"):format(data.repository.name, commit.author.name, commit.message:match("^[^\r\n]*"))):up()
					:tag("content"):text(commit.message):up()
					:tag("link", { rel = "alternate", href = commit.url }):up()
					:tag("published"):text(commit.author.date):up()
					:tag("author")
						:tag("name"):text(commit.author.name):up()
						:tag("email"):text(commit.author.email):up()
						:up()
			);
			if not ok then
				return error_mapping[err] or 500;
			end
		end

	elseif github_event then
		module:log("debug", "Unsupported Github event %q", github_event);
		return 501;
	end

	response.status_code = 202;
	return "Thank you Github!";
end

module:provides("http", {
	route = {
		POST = handle_POST;
	};
});

if not node_mapping then
	function module.load()
		if not pubsub_service.nodes[default_node] then
			local ok, err = pubsub_service:create(default_node, true);
			if not ok then
				module:log("error", "Error creating node: %s", err);
			else
				module:log("debug", "Node %q created", default_node);
			end
		end
	end
end