python监控端口流量_监控网卡流量python代码详解

[Python]代码

import re,time

def get_net_info():

flow1 = open('/proc/net/dev')

lines = flow1.read()

flow1.close()

e = re.compile('(eth.)')

r_re = re.compile('eth..(.*?\s)')

r_tr = re.compile(".*eth.*")

match_re = r_re.findall(lines)

match_tr = r_tr.findall(lines)

eth = e.findall(lines)

return (eth,lines,match_re,match_tr)

def net_flow():

net_re_c={}

net_tr_c={}

net_tr_a=[]

for i in get_net_info()[3]:

net_tr_a.append(i.split()[8])

net_tr_a=dict(zip(get_net_info()[0],net_tr_a))

net_re_a = dict(zip(get_net_info()[0],get_net_info()[2]))

print "{eth0:(transmit,receive)"

while True:

time.sleep(1)

net_re_b = dict(zip(get_net_info()[0],get_net_info()[2]))

net_tr_b = []

for i in get_net_info()[3]:

net_tr_b.append(i.split()[8])

net_tr_b=dict(zip(get_net_info()[0],net_tr_b))

for i in net_re_b:

net_re_c[i] = int((float(net_re_b[i])-float(net_re_a[i]))/1024)

for i in net_tr_b:

net_tr_c[i]=int((float(net_tr_b[i])-float(net_tr_a[i]))/1024)

net_re_a = net_re_b

net_tr_a = net_tr_b

net_flow={}

for a in net_re_c:

net_flow[a]=(net_tr_c[a],net_re_c[a])

print net_flow

if __name__ == "__main__":

net_flow()