class RemoteHost:
"""Examples of use:
remotehost = RemoteHost('gkollias@isabella', '/home/giorgos/.ssh/id_rsa')
#establishes ssh connection
"""
def __init__(self, address = None, keypath=" "):
"""An established ssh connection to address.
address is of the form user@host:port where the :port part is optional.
keypath is the path to the local private key.
"""
user, host, port = self.parse(address)
self.connection = Connection(host, port)
self.connection.connect()
print "Loging in to ssh server " + host
try:
if os.path.isfile(keypath):
keyfile = File(keypath)
self.connection.authenticateWithPublicKey(user, keyfile, None)
else:
psw = readPassword("UI Password:"******"Authentication Failed"
return None
self.user = user
self.host = host
self.keypath = keypath
self.port = port
#self.connection = connection
#TODO:Make env a dictionary
self.env = getSSHEnv(self.connection)
self.keepAlive = 1
self.startKeepAlive()
def parse(self, address):
"""address (sth of the form user@host:port) is converted to
[user, host, port].
"""
if address is None:
hostport = raw_input("UI Host:")
user = raw_input("UI Username:"******"/bin/date"
rhost = self
class NestedRunnable(lang.Runnable):
def run(self):
while (rhost.keepAlive == 1):
lang.Thread.sleep(interval)
sess = rhost.connection.openSession()
sess.execCommand(command) # execute command
inputreader = BufferedReader(InputStreamReader(sess.getStdout()))
inputreader.readLine()
sess.close()
self.keepAliveThread = lang.Thread(NestedRunnable())
self.keepAliveThread.start()
def stopKeepAlive(self):
self.keepAlive = 0
try:
self.keepAliveThread.interrupt()
except:
pass
def destroy(self):
""" Close Connection Sessions and Streams """
self.connection.close()
self.stopKeepAlive()
