# headerlentest.py
request = 'HEAD / HTTP/1.0\nServer: %s\nUser-Agent: %%s\n\n' % target[0] 
 
last = '' 
for i in range(1, 67000): 
    s = socket(AF_INET, SOCK_STREAM) 
    s.connect(target) 
    r = request % ('X' * i) 
    s.send(r) 
    s.shutdown(1) 
    headers = s.recv(8192).split('\n') 
    response = headers[0].strip() 
    if response != last: 
        print '%5d (%d bytes headerlength): %r'%(i,len(r), response) 
        last = response