重新提交表单 web.py 时保持 SSH 进程

Question

我已经在我的 web.py 服务器中实现了一个 SSH 命令。当用户按下按钮时，SSH 命令会发送到我的另一个 Raspberry Pi，然后它会播放电影。但是，每次表单重置时，电影都会停止播放。

即使表单已刷新，如何让 Python 继续执行子进程 (SSH)？

代码：

import web
from web import form
import os
import paramiko

cmd = 'cd /media/movies'
remove_bars = 'sudo sh -c "TERM=linux setterm -foreground black -clear >/dev/tty0" '
ah = 'omxplayer -o hdmi "American Hustle.mp4" <fifo &'
nsm = 'omxplayer -o hdmi "Now You See Me.mp4" <fifo &'

def makeSSH():
    ssh = paramiko.SSHClient()
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    ssh.connect('192.168.1.115', username='pi', password='raspberry')
    stdin, stdout, stderr = ssh.exec_command(cmd)
    stdin, stdout, stderr = ssh.exec_command(remove_bars)
    return ssh;


# define the pages
urls = ('/', 'index')
render = web.template.render('templates')

app = web.application(urls, globals())


my_form = form.Form(
        form.Button("btn", id="btnA", value="A", html="Now You See Me", class_="btnA")
)

class index:
    # GET is used when the page is first requested
    def GET(self):
        form = my_form()
        return render.index(form, "RPi Remote Control")

    # POST is called when a web form is submitted
    def POST(self):
        # get the data submitted from the web form
        userData = web.input()

        if userData.btn == "A":
            print "TEST 1"
            ssh = makeSSH()
            stdin, stdout, stderr = ssh.exec_command(nsm)
        else:
            print "WHAT IS GOING ON?"


        raise web.seeother('/')


if __name__ == '__main__':
    app.run()

Answer 1

我在 /media/movies/ 中添加了电影目录，并且在 raise web.seeother('/') 之前添加了 time.sleep(10)