Server

print("I am the server")
-- server
local modemSide = "right"
local filesList = {
  cake  = "/cake",
  can   = "/can",
  case  = "/case",
  computer = "/computer",
  foot  = "system/foot",
  krypt = "/krypt",
  mouse = "home/mouse",
  notepad = "/notepad",
  pen = "/pen",
  test = "/test"
}

rednet.open(modemSide)

while true do
  local event, senderId, message, distanceSent = os.pullEvent("rednet_message") -- only pull rednet events
  local packet -- forward declaration
  print('got a request from '..senderId..' for '..message)
  if filesList[message] then -- if the requested file exists
    local handle = fs.open(filesList[message], "r")
    if not handle then -- if we cannot open the file for some reason
      packet = { success=false, message="Could not open desired file" }
    else
      packet = { success=true, message=handle.readAll(), path=filesList[message] } -- read the file into our packet
      handle.close() -- close the file
    end
  else
    packet = { success=false, message="No program with that name" }
  end
  rednet.send(senderId, textutils.serialize(packet)) -- send our packet
end

rednet.close(modemSide)