Question

我想知道为什么捕获（管道）stdout导致空文件，而没有捕获它导致正常输出。输出到终端时，我没有收到编码错误。仅在输出管道时。

输出到管道而不是终端时，编码是否会改变？也许终端可以发出支持的编码信号，而管道默认为ASCII？

管道输出

$ curl -s 'https://www.sunwind.no/Outlet/'  | html2text | wc
Traceback (most recent call last):
  File "<string>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe5' in position 212: ordinal not in range(128)
      0       0       0

未捕获输出

curl -s 'https://www.sunwind.no/Outlet/' | html2text
  * [Forsiden](https://www.sunwind.no/)
  * [Logg inn](/login/)
  * [Registrer meg](https://www.sunwind.no/register/)

[![](https://www.sunwind.no/images/flag/NORW0001.GIF)](https://www.sunwind.no
"Klikk her for å gå til forsiden")
[![](https://www.sunwind.no/images/flag/SWDN0001.GIF)](https://www.sunwind.se
"Klikk her for å gå til Sunwinds svenske side")
[![](https://www.sunwind.no/images/flag/FINL0001.GIF)](https://www.sunwind.fi
"Klikk her for å gå til Sunwinds finske side")
[![](https://www.sunwind.no/images/flag/DENM0001.GIF)](https://www.sunwind.no/page/?pid=132
"Klikk her for å gå til Sunwinds danske side")
[![](https://www.sunwind.no/images/flag/UK0001.GIF)](https://www.sunwind.no/en/
"Klikk her for å gå til engelsk side")

[ ![](https://www.sunwind.no/images/Logo.png)](https://www.sunwind.no/)

![](https://www.sunwind.no/images/Enjoy_Brun_logo_text.png)

  * __ 0 **kr 0,-**

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  * Alle produkter __

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etc

html2text别名是一行python命令：

alias html2text='python -c "import sys,html2text;sys.stdout.write(html2text.html2text(sys.stdin.read().decode(\"utf-8\")))"'

这是我第一次遇到这种行为。我的单行程不知道处理管道输出吗？

Answer 1

只需2美分，因为输入数据已正确解码（.decode(\"utf-8\")），输出数据也需要编码（.encode(\"utf-8\")）。因此，您的一个班轮的工作版本应如下所示。 why问题需要很长时间才能学习。

alias html2text='python2 -c "import sys,html2text;sys.stdout.write(html2text.html2text(sys.stdin.read().decode(\"utf-8\")).encode(\"utf-8\"))"'
curl -s 'https://www.sunwind.no/Outlet/'  | html2text | wc
    764    1839   29329

未输出到终端

1 个答案: