import pcapy, gzip, StringIO, re
from impacket.ImpactDecoder import *

def getParam(typ, data):
    d=re.compile(typ+'(.*?)\n')
    res=re.findall(d, data)
    return res[0]

max_bytes = 10000000
promiscuous = False
read_timeout = 1000 
pc = pcapy.open_live("wlan0", max_bytes, promiscuous, read_timeout)
pc.setfilter('tcp')
 
def recv_pkts(hdr, data):
    packet = EthDecoder().decode(data)
    packet=packet.get_data_as_string()
    Size=int(getParam('Content-Length: ', packet))
    if "Content-Encoding: gzip" in packet:
        query=gzip.GzipFile('', 'rb', 9, StringIO.StringIO(packet))
        print query.read()
                
packet_limit = -1 
pc.loop(packet_limit, recv_pkts)