Downloading Remote Files using HTTP

local tArgs = {...}
local function get(url)
  write( "Connecting to the website..." )
  local response = http.get(
    url
  )
  if response then
    print("Success")
   
    local sResponse = response.readAll()
    response.close()
    return sResponse
  else
    printError( "Failed." )
  end
end
local function printUsage()
  error("Usage: "..shell.getRunningProgram().." <get> <url> <fileName>" , 0 )
end
local sCommand = tArgs[1]
if sCommand == "get" then
  if #tArgs < 3 then
    printUsage()
    return
  end
  local sURL = tArgs[2]
  local sFile = tArgs[3]
  local sPath = shell.resolve( sFile )
  if fs.exists( sPath ) then
    print( "File already exists" )
    return
  end
  local res = get( sURL )
  if res then
    local file = fs.open( sPath, "w" )
    file.write( res )
    file.close()
    print( "Downloaded as "..sFile )
  end
end