python - python3 http请求中的TypeError : a bytes-like object is required,不是 'str'

Question

当我运行这段代码时:

#!/usr/bin/env python

import scapy.all as scapy
from scapy_http import http


def sniff(interface):
    scapy.sniff(iface=interface, store=False, prn=process_sniffed_packet)


def process_sniffed_packet(packet):
    if packet.haslayer(http.HTTPRequest):
        print(packet)


sniff("eth0")

我得到了:

Traceback (most recent call last):   File "packet_sniffer.py", line 16, in <module>
    sniff("eth0")   File "packet_sniffer.py", line 8, in sniff
    scapy.sniff(iface=interface, store=False, prn=process_sniffed_packet)   File "/usr/local/lib/python3.7/dist-packages/scapy/sendrecv.py", line 886, in sniff
    r = prn(p)   File "packet_sniffer.py", line 13, in process_sniffed_packet
    print(packet)   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 438, in
__str__
    return str(self.build())   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 556, in build
    p = self.do_build()   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 541, in do_build
    pay = self.do_build_payload()   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 528, in do_build_payload
    return self.payload.do_build()   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 541, in do_build
    pay = self.do_build_payload()   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 528, in do_build_payload
    return self.payload.do_build()   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 541, in do_build
    pay = self.do_build_payload()   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 528, in do_build_payload
    return self.payload.do_build()   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 541, in do_build
    pay = self.do_build_payload()   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 528, in do_build_payload
    return self.payload.do_build()   File "/usr/local/lib/python3.7/dist-packages/scapy/packet.py", line 538, in do_build
    pkt = self.self_build()   File "/usr/local/lib/python3.7/dist-packages/scapy_http/http.py", line 179, in self_build
    return _self_build(self, field_pos_list)   File "/usr/local/lib/python3.7/dist-packages/scapy_http/http.py", line 101, in _self_build
    val = _get_field_value(obj, f.name)   File "/usr/local/lib/python3.7/dist-packages/scapy_http/http.py", line 74, in _get_field_value
    headers = _parse_headers(val)   File "/usr/local/lib/python3.7/dist-packages/scapy_http/http.py", line 18, in _parse_headers
    headers = s.split("\r\n") TypeError: a bytes-like object is required, not 'str'

我该怎么办？

Answer 1

您可以使用 python2 而不是 python3 来解决这个问题。如果您不想更改 Python 版本，则需要对 scapy-http 的库代码进行一些更改。从你的回溯中我可以看到该文件位于:/usr/local/lib/python3.7/dist-packages/scapy_http/http.py。现在使用任何文本编辑器打开该文件。

更改第 18 行:

headers = s.split("\r\n")

到:

try:
    headers = s.split("\r\n")
except TypeError as err:
    headers = s.split(b"\r\n")

然后将第 109 行更改为:

p = f.addfield(obj, p, val + separator)

到:

try:
    p = f.addfield(obj, p, val + separator)
except TypeError as err:
    p = f.addfield(obj, p, str(val) + str(separator))