plugins/urltitle.lua

function riddim.plugins.urltitle(bot)

	local http = require "prosody.net.http";

	local function handler(message)

		local url = message.body and message.body:match("https?://%S+");

		if url then

			http.request(url, nil, function (data, code)

				if code ~= 200 then return end

				local title = data:match("<title[^>]*>([^<]+)");

				if title then

					title = title:gsub("\n", "");

					if message.room then

						message.room:send_message(title)

					else

						message:reply(title);

					end

				end

			end);

		end

	end

	bot:hook("message", handler);

	bot:hook("groupchat/joined", function(room)

		room:hook("message", handler)

	end);

end