Question

I would like any BSD libraries I would prefer python but any language is great.

Answer 1

Good question guaranteed to depend on host config (could be custom or
fake descriptions) while one mentioned way is use HTTP HEAD

#Call HTTP HEAD in Python
import httplib
conn=httplib.HTTPConnection("www.abc.com")
conn.request("HEAD", "/dir/file1.mp3")
res=conn.getresponse()
fileSize=res.getheader('content-length')
#or res.getheaders() for all headers
conn.close()