python 抓取request信息，各种cookie，user-agent类的信息，只调试到http可以抓取，https貌似不行。

import pcap  # 安装的是pypcap，本博客有安装方法，不过也比较乱，试试吧。
import dpkt
import socket
import datetime

def sniffer(str):
    pc = pcap.pcap()
    for timestamp, buf in pc:
        eth = dpkt.ethernet.Ethernet(buf)
        if not isinstance(eth.data, dpkt.ip.IP):
            print('Non IP Packet type not supported %s\n' % eth.data.__class__.__name__)
            continue
        ip = eth.data
        if isinstance(ip.data, dpkt.tcp.TCP):
            tcp = ip.data
            try:
                request = dpkt.http.Request(tcp.data)
            except (dpkt.dpkt.NeedData, dpkt.dpkt.UnpackError):
                continue
            print('HTTP request: %s\n' % repr(request))
            if request.headers['host'] == str:  # 自行替换需要抓的网站。
                print(request)
                # print('type:', type(request))
                host = request.headers['host']
                connection = request.headers['connection']
                accept = request.headers['accept']
                user_agent = request.headers['user-agent']
                accept_encoding = request.headers['accept-encoding']
                accept_language = request.headers['accept-language']
                cookie = request.headers['cookie']
                return request
                break

request = sniffer('www.******.net')
print('---------')
print(request.headers['host'])

这个代码是抓取一个网站请求的request信息。