Paramiko, exec_command 连续获取输出流

问题描述

我写了一个 Python 脚本.我为给定的 IP 创建了一个 Python 脚本，将通过 Paramiko 连接到服务器以执行另一个 Python 脚本.

I dry on a Python script. I create a python script for a given IP will connect via Paramiko to a server to execute another Python script.

这是一些代码:

self._client = paramiko.SSHClient()
self._client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
self._client.connect(self._ip, username=self._server['username'], password=self._server['password'])
channel = self._client.get_transport().open_session()
channel.exec_command('python3 /tmp/scrap.py /tmp/' + self._ip + '.txt 0 1')

脚本scrap.py"每 X 秒在远程机器的控制台中返回一行，但是我无法恢复上面脚本中的这些行(在 exec_command (. ..) 退出时).

The script "scrap.py" returns every X seconds a line in the console of the remote machine, but I can not recover as and when these lines in the script above (at the exit of exec_command (. ..)).

这可能吗，如果有，你知道怎么做吗?

Is this possible, and if so have you any idea how?

提前致谢.

推荐答案

这应该可以解决问题:

stdin, stdout, stderr = channel.exec_command("python myScript.py")
stdin.close()
for line in iter(lambda: stdout.readline(2048), ""):
    print(line, end="")

如 read([size]) 文档中所述，如果您不指定大小，它会一直读取到 EOF，这使得脚本在从 read() 返回并打印任何输出之前等待命令结束.

As specified in the read([size]) documentation, if you don't specify a size, it reads until EOF, that makes the script wait until the command ends before returning from read() and printing any output.

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