在破解豆瓣的window.DATA时,使用python的execjs执行js,会有这个错误:

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Exception in thread Thread-1:
Traceback (most recent call last):
File "E:\codes\python\lib\threading.py", line 917, in _bootstrap_inner
self.run()
File "E:\codes\python\lib\threading.py", line 865, in run
self._target(*self._args, **self._kwargs)
File "E:\codes\python\lib\subprocess.py", line 1238, in _readerthread
buffer.append(fh.read())
UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 41: illegal multibyte sequence

Traceback (most recent call last):
File "E:/Python/python_project/decrypt_js/douban.py", line 13, in <module>
data = ctx.call('decrypt', r)
File "E:\codes\python\lib\site-packages\execjs\_abstract_runtime_context.py", line 37, in call
return self._call(name, *args)
File "E:\codes\python\lib\site-packages\execjs\_external_runtime.py", line 92, in _call
return self._eval("{identifier}.apply(this, {args})".format(identifier=identifier, args=args))
File "E:\codes\python\lib\site-packages\execjs\_external_runtime.py", line 78, in _eval
return self.exec_(code)
File "E:\codes\python\lib\site-packages\execjs\_abstract_runtime_context.py", line 18, in exec_
return self._exec_(source)
File "E:\codes\python\lib\site-packages\execjs\_external_runtime.py", line 87, in _exec_
output = self._exec_with_pipe(source)
File "E:\codes\python\lib\site-packages\execjs\_external_runtime.py", line 103, in _exec_with_pipe
stdoutdata, stderrdata = p.communicate(input=input)
File "E:\codes\python\lib\subprocess.py", line 939, in communicate
stdout, stderr = self._communicate(input, endtime, timeout)
File "E:\codes\python\lib\subprocess.py", line 1288, in _communicate
stdout = stdout[0]
IndexError: list index out of range

原因是有一个程序在使用TextIOWrapper 类创建对象时默认使用了cp936的编码,也就是gbk编码,读取不了utf-8的字符,
所以我们可以修改下 subprocess.py 文件的默认编码方式为utf-8即可

在代码行656有个初始化,直接修改默认即可,如下
image.png

修改完再运行代码,结果就出来了,没有报错