MineCraft Launcher with server search

You need to write a Minecraft Launcher application with a search for servers for windows of all versions (starting with XP).
Appearance Texte caché
At launch, the launcher update is checked on the remote server, if any, then downloaded.
There is no authorization, a list of servers is immediately issued. The number of servers can be several thousand, and the number of clients per day can be more than 100,000, so you need to take into account the load on the remote server and think about the principle of giving the list of servers.
When receiving a list of servers, the client surveys each of them and receives the necessary information (the server version, the current / maximum number of players, the name of the server, the list of plugins installed on the server, ping to the server). The basis of the survey of servers can be taken ready-made php classes.
The client has a filter of servers by plugins and version. The version list is received from a remote server. The filter on plugins is formed by the raid and depends on the servers in the list.
When connecting to the server, the presence of the game version in the folder C:UsersuserAppDataRoaming.minesearchversions, as well as other auxiliary files, is checked and the missing ones are downloaded with the indication (download speed, how much time is left, etc.). Then start the game and automatically connect to the server
The principle of the device versions and auxiliary files make on the principle of TLauncher Texte caché

The game versions are about 30MB in size, and the auxiliary files are about 200MB, but they are downloaded once, and then only checked with a remote server. Security requirements. Protect the client from decompilation and interference from minecraft servers to which the user will connect.