view mod_post_msg/mod_post_msg.lua @ 5648:c217f4edfc4f

misc/mtail: Start of an mtail config Stashing it here in case anyone wants to continue working on it. Currently it's only counting log messages by level. Due to the permissions set by systemd on Prosody logs, mtail never managed to start correctly until permissions were manually relaxed.
author Kim Alvefur <zash@zash.se>
date Sun, 17 Sep 2023 13:36:30 +0200
parents 926aaaeb0d21
children
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module:depends"http"

local jid_split = require "util.jid".split;
local jid_prep = require "util.jid".prep;
local msg = require "util.stanza".message;
local test_password = require "core.usermanager".test_password;
local b64_decode = require "util.encodings".base64.decode;
local formdecode = require "net.http".formdecode;
local xml = require"util.xml";
local json = require "util.json";

local function require_valid_user(f)
	return function(event, path)
		local request = event.request;
		local response = event.response;
		local headers = request.headers;
		if not headers.authorization then
			response.headers.www_authenticate = ("Basic realm=%q"):format(module.host.."/"..module.name);
			return 401
		end
		local from_jid, password = b64_decode(headers.authorization:match"[^ ]*$"):match"([^:]*):(.*)";
		from_jid = jid_prep(from_jid);
		if from_jid and password then
			local user, host = jid_split(from_jid);
			local ok, err = test_password(user, host, password);
			if ok and user and host then
				module:log("debug", "Authed as %s", from_jid);
				return f(event, path, from_jid);
			elseif err then
				module:log("debug", "User failed authentication: %s", err);
			end
		end
		return 401
	end
end

local function handle_post(event, path, authed_user)
	local request = event.request;
	local response = event.response;
	local headers = request.headers;

	local body_type = headers.content_type;
	local to = jid_prep(path);
	local message;
	if body_type == "text/plain" then
		if to and request.body then
			message = msg({ to = to, from = authed_user, type = "chat"},request.body);
		end
	elseif body_type == "application/x-www-form-urlencoded" then
		local post_body = formdecode(request.body);
		message = msg({ to = post_body.to or to, from = authed_user,
		                type = post_body.type or "chat"}, post_body.body);
		if post_body.html then
			local html, err = xml.parse([[<body xmlns="http://www.w3.org/1999/xhtml">]]..post_body.html..[[</body>]]);
			if not html then
				module:log("warn", "mod_post_msg: invalid XML: %s", err);
				return 400;
			end
			message:tag("html", {xmlns="http://jabber.org/protocol/xhtml-im"}):add_child(html):up();
		end
	elseif body_type == "application/json" then
		local post_body = json.decode(request.body);
		if not post_body then return 400; end
		message = msg({ to = post_body.to or to, from = authed_user,
		                type = post_body.type or "chat"}, post_body.body);
	else
		return 415;
	end
	if message and message.attr.to then
		module:log("debug", "Sending %s", tostring(message));
		module:send(message);
		return 201;
	end
	return 422;
end

module:provides("http", {
	default_path = "/msg";
	route = {
		["POST /*"] = require_valid_user(handle_post);
		OPTIONS = function(e)
			local headers = e.response.headers;
			headers.allow = "POST";
			headers.accept = "application/x-www-form-urlencoded, text/plain";
			return 200;
		end;
	}
});