def create_vnc_tunnel(self, vnc_port):
if not self.connected:
raise exceptions.MisuseError("The client is not yet connected. Misuse of function \"create_vnc_tunnel()\"")
elif vnc_port > 99 or vnc_port <= 0:
raise exceptions.MisuseError("VNC port number should be between 1 and 99. ")
_, _, stderr = self.client.exec_command('vncserver :' + str(vnc_port))
for line in stderr:
print('... ' + line.strip('\n'))
actual_port = 5900 + vnc_port
super().create_forward_tunnel(actual_port, actual_port)
def __new__(cls, *args, **kwargs):
# to prevent misuse of the class
if cls.instantiated:
raise exceptions.MisuseError(
"class %s has been instantiated. Misuse of constructor. " %
cls.__name__)
return super(UGProfile, cls).__new__(cls, *args, **kwargs)
def create_vnc_tunnel(self):
if not self.connected:
raise exceptions.MisuseError(
"The client is not yet connected. Misuse of function \"create_vnc_tunnel()\""
)
super().create_forward_tunnel(ECFConnection.LOCAL_PORT,
ECFConnection.REMOTE_PORT)
def killall_VNC_servers(self):
if not self.connected:
raise exceptions.MisuseError(
"The client is not yet connected. Misuse of function \"killall_VNC_servers()\"")
# rm -f ~/.vnc/$HOST*
# to prevent any "stale" servers showing when we check ports
_, _, stderr = self.client.exec_command("killall Xtigervnc; rm -f ~/.vnc/$HOST*")
for line in stderr:
print(line)
def update_ports(self):
self.used_ports_lst = []
self.ports_by_me_lst = []
if not self.connected:
raise exceptions.MisuseError("The client is not yet connected. Misuse of function \"update_ports()\"")
# formulate the vnc port scanning cmd
scan_ports_cmd_lst = []
for port in range(5900, 5999):
scan_ports_cmd_lst.append('sh -c "nc -z -nv 127.0.0.1 ' + str(port) + ' 2>&1" | grep \'open\|succeeded\'')
scan_ports_cmd = ";".join(scan_ports_cmd_lst)
# send out the vnc port scanning cmd
_, stdout, _ = self.client.exec_command(scan_ports_cmd)
for line in stdout:
if "open" in line: # on other machines
line = line.replace('(UNKNOWN) [127.0.0.1] ', '') # remove prefix
line = line.replace(' (?) open', '') # remove suffix
elif "succeeded" in line: # on ug250 and ug251
line = line.replace('Connection to 127.0.0.1 ', '') # remove prefix
line = line.replace(' port [tcp/*] succeeded!', '') # remove suffix
else:
raise exceptions.MisuseError("Unexpected output when scanning vnc ports: %s" % line)
this_used_port = int(line) - 5900
if this_used_port <= 0 or this_used_port > 99:
raise exceptions.MisuseError("Unexpected port number when scanning vnc ports: %d" % this_used_port)
self.used_ports_lst.append(this_used_port)
# use the API by vncserver to see what ports are created by me
_, stdout, _ = self.client.exec_command('vncserver -list')
for line in stdout:
this_port_by_me = re.findall(r'\d+', line)
if len(this_port_by_me) != 0:
self.ports_by_me_lst.append(int(this_port_by_me[0]))
def save_profile(self, last_lab, viewer):
if type(last_lab) is not str or last_lab not in ("EECG", "ECF"):
raise exceptions.MisuseError(
"last_lab should be one of 'EECG' or 'ECF'")
self["last_lab"] = last_lab
self["viewer"] = viewer
try:
with open(PROFILE_FILE_PATH, 'w') as outfile:
profile_dict = copy.deepcopy(self._profile)
profile_dict["last_checked_update"] = datetime.datetime.now(
).isoformat()
profile_dict["EECG"]["passwd"] = base64.b64encode(
self["EECG"]["passwd"].encode('ascii')).decode('ascii')
profile_dict["ECF"]["passwd"] = base64.b64encode(
self["ECF"]["passwd"].encode('ascii')).decode('ascii')
json_data = json.dumps(profile_dict, indent=4)
outfile.write(json_data)
except Exception:
# need to handle any write permission issues, once observed
raise Exception