需要一个类似字节的对象，而不是 'str' ：TypeError

Question

我正在使用 python-3.7 构建一个嗅探工具，当我尝试使用 scapy_http 模块时遇到了这个错误。

它在 python-2.x 中工作正常。对象类型为 scapy.layers.l2.Ether

def process(packet):
    if packet.haslayer(http.HTTPResponse):
        print(packet)

> Traceback (most recent call last):   File "sniffer.py", line 13, in
> <module>
>     sniff("wlan0")   File "sniffer.py", line 6, in sniff
>     scapy.sniff(iface=interface, store=False,prn=process)   File "/usr/local/lib/python3.7/dist-packages/scapy/sendrecv.py", line 886,
> in sniff
>     r = prn(p)   File "sniffer.py", line 10, in process
>     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 227,
> 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'

Answer 1

scapy_http 已弃用（不适用于 Python 3），HTTP 模块现在默认包含在 Scapy 中。

请升级到GitHub版本或最新的RC：

pip install scapy --upgrade --pre

需要一个类似字节的对象，而不是 'str' ：TypeError

a bytes-like object is required, not 'str' : TypeError

python

python-3.x

scapy

sniffing