Initial data commit

Task/Echo-server/Lua/echo-server-1.lua

@@ -0,0 +1,38 @@
+local socket = require("socket")
+
+local function has_value(tab, value)
+    for i, v in ipairs(tab) do
+        if v == value then return i end
+    end
+    return false
+end
+
+local function checkOn(client)
+   local line, err = client:receive()
+	if line then
+		client:send(line .. "\n")
+	end
+	if err and err ~= "timeout" then
+		print(tostring(client) .. " " .. err)
+		client:close()
+		return true  -- end this connection
+   end
+	return false  -- do not end this connection
+end
+
+local server = assert(socket.bind("*",12321))
+server:settimeout(0)  -- make non-blocking
+local connections = { }  -- a list of the client connections
+while true do
+	local newClient = server:accept()
+	if newClient then
+		newClient:settimeout(0)  -- make non-blocking
+		table.insert(connections, newClient)
+	end
+	local readList = socket.select({server, table.unpack(connections)})
+	for _, conn in ipairs(readList) do
+		if conn ~= server and checkOn(conn) then
+			table.remove(connections, has_value(connections, conn))
+		end
+	end
+end