如何在pyshark中访问嗅探到的http包中包含的xml有效负载的文本表示？

import pyshark
from pyshark.packet.layer import Layer

capture = pyshark.FileCapture('capture.pcap')  # 或者使用pyshark.LiveCapture(interface='eth0')

for packet in capture:
    if 'HTTP' in packet:
        # 处理HTTP包

http_layer = packet['HTTP']
if 'Content-Type' in http_layer.field_names and http_layer['Content-Type'] == 'application/xml':
    xml_payload = http_layer.get_field_by_showname('XML payload').raw_value

# 在这里可以使用适当的库或模块来解析和处理XML数据