start ssh connection from bottle and send some data to stdin

runcmd.py

import threading
from StringIO import StringIO

runcmdLock = threading.Lock()
def runcmd(keyf, username, send):
    runcmdLock.acquire(True)
    while 1:
        if not (keyf, username) in default_app().chan:
            key = RSAKey.from_private_key(file_obj=StringIO(keyf))
            client = SSHClient()
            client.load_system_host_keys('/usr/local/etc/ssh/ssh_known_hosts')
            client.connect('127.0.0.1', pkey=key, username=username)
            chan = client.invoke_shell()
            chan.settimeout(0.0)
            default_app().chan[(keyf, username)] = chan
            default_app().client[(keyf, username)] = client
        else:
            chan = default_app().chan[(keyf, username)]
        try:
            chan.sendall(send)
            break
        except socket.error:
            print 'socket.error'
            default_app().chan[(keyf, username)] = None
    ret = ''
    while not ret.startswith(send[:-1]+'\r\n'):
        rlist, wlist, xlist = select.select([chan], [], [], 10)
        if rlist:
            ret += chan.recv(2048)
            #print 1, [ret]
    ret = ret[len(send)+1:]

    while not '\r\n' in ret:
        rlist, wlist, xlist = select.select([chan], [], [], 10)
        if rlist:
            ret += chan.recv(2048)
            #print 2, [ret]

    runcmdLock.release()
    return ret

app = default_app()
app.chan = {}
app.client = {}