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Make option redirect output from `--output/-o` to `stdin`

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技术栈
python
领域
cli

调研方向

从 httpie/cli/argparser.py 中的 _setup_standard_streams() 开始,traceback 显示这里对输出流调用了 seek(0),然后跟踪 --output 如何通过 httpie/core.py 进行处理。使用 -o - 和二进制响应复现该命令;当输出到达 stdout,并且可以在不出现 seekability 错误的情况下通过管道传给 head 或 xxd 时,就完成了。

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描述

enhancement new

Checklist

  • I've searched for similar feature requests.

Enhancement request

I want to be able to redirect the output when using the --output/-o flag to the stdin like this:

http www.example.com/?req=index.html --output -

Currently if I run it this way, it shows this error message:

Traceback (most recent call last):
  File "/home/user/.local/bin/http", line 8, in <module>
    sys.exit(main())
  File "/home/user/.local/lib/python3.10/site-packages/httpie/__main__.py", line 9, in main
    exit_status = main()
  File "/home/user/.local/lib/python3.10/site-packages/httpie/core.py", line 162, in main
    return raw_main(
  File "/home/user/.local/lib/python3.10/site-packages/httpie/core.py", line 77, in raw_main
    parsed_args = parser.parse_args(
  File "/home/user/.local/lib/python3.10/site-packages/httpie/cli/argparser.py", line 172, in parse_args
    self._setup_standard_streams()
  File "/home/user/.local/lib/python3.10/site-packages/httpie/cli/argparser.py", line 250, in _setup_standard_streams
    self.args.output_file.seek(0)
io.UnsupportedOperation: File or stream is not seekable.

Problem it solves

I know if the output format is normal we don't have to use this. But when the output is binary or the file contains some null bytes somewhere like %00 http won't show the output. But we can rather use the --output/-o to redirect the binary to a file.
I don't want to redirect to a new file, I just want to check the file content in a single command. This is more productive because I can now redirect the input stream to other programs like head, xxd etc.
Like this:

http example.com/binary -b --output - | head | xxd 
主要语言
Python
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  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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