调用子进程时在文件名中引用空格

Question

有人想出了在文件名中加入空格的好主意。我需要使用该文件名从 python 执行 scp，这是有问题的，因为 shell 解析命令，并且 scp 也有一些关于空格的怪癖。这是我的测试代码：

import subprocess
import shlex


def split_it(command):
    return shlex.split(command)
    #return command.split(" ")


def upload_file(localfile, host, mypath):
    command = split_it('scp {} {}:"{}"'.format(localfile, host, mypath))
    print(command)
    res = subprocess.run(command, stdout=subprocess.PIPE)
    return res.stdout.decode()


upload_file("localfile.txt", "hostname", "/some/directory/a file with spaces.txt")

给出：

['scp', 'localfile.txt', 'hostname:/some/directory/a file with spaces.txt']
scp: ambiguous target

使用原始版本 command.split(" "):

['scp', 'localfile.txt', 'hostname:"/some/directory/a', 'file', 'with', 'spaces.txt"']
spaces.txt": No such file or directory

正确的 scp 命令应该是：

['scp', 'localfile.txt', 'hostname:"/some/directory/a file with spaces.txt"']

有现成的解决方案吗？
如果不是，那么稳健的做法是什么：

split_it('scp localfile.txt hostname:"/some/directory/a file with spaces.txt"')
# returns ['scp', 'localfile.txt', 'hostname:"/some/directory/a file with spaces.txt"']

Answer 1

command = split_it('scp {} {}:"{}"'.format(localfile, host, mypath))

不构建命令字符串，只是为了再次split_it，直接构建参数列表。
为了向远程文件路径添加一层引号，如果使用旧的 Python 版本，请使用 shlex.quote (or pipes.quote。

command = ['scp', localfile, '{}:{}'.format(host, shlex.quote(mypath))]

Sources/related 个帖子：

How to escape spaces in path during scp copy in linux?
Python scp copy file with spaces in filename
https://docs.python.org/3/library/subprocess.html#popen-constructor

调用子进程时在文件名中引用空格

Quote spaces in filename when calling subprocess

python

shell

subprocess

scp

spaces