No, it isn't. There is a list of functions and events in the description of the resource. The syntax of the function downloadFile is the following:
boolean downloadFile ( string filePath, string savePath, int interval )
I added a symbol before 'boolean' because the function only returns a boolean value (false) when something doesn't go right, like the arguments are invalid.
filePath - This is the path (including file name and extension) to the file you want to download.
savePath - This is the path where the file will be saved (client's computer - root path is %MTA_FOLDER%/mods/deathmatch/resources)
interval - This is the interval, in milliseconds, between each client event trigger (basically this is the interval between each data sending). Setting a very low interval is not recommended.