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import os
import secrets
import signal
from multiprocessing import Process
import psutil
import requests
import port_for
from flask import Flask, abort, request
from vnc import run_vnc, save_password
API_SERVER = "http://127.0.0.1:8000"
REGISTER_URL = API_SERVER + "/app/rwa/api/register/"
class Session:
#: Session is running
STATUS_RUNNING = "running"
#: Remote has joined the session
STATUS_JOINED = "joined"
def __init__(self):
self._generate_password()
self._start_vnc()
self._start_trigger_service()
self._register_session()
@property
def pid(self) -> int:
return self.vnc_pid
@property
def port(self) -> int:
return self.ws_port
def _generate_password(self):
"""Generate password for x11vnc and save it."""
self.password = secrets.token_urlsafe(20)
self.pw_filename = save_password(self.password)
def _start_vnc(self):
"""Start x11vnc server."""
process_info = run_vnc(self.pw_filename)
self.vnc_pid = process_info["vnc"]["pid"]
self.vnc_port = process_info["vnc"]["port"]
self.ws_pid = process_info["ws"]["pid"]
self.ws_port = process_info["ws"]["port"]
def _register_session(self):
"""Register session in RWA."""
r = requests.post(
REGISTER_URL,
json={
"port": self.ws_port,
"password": self.password,
"pid": self.vnc_pid,
"trigger_port": self.trigger_port,
"trigger_token": self.trigger_token,
},
)
print(r)
self.meta = r.json()
self.session_id = self.meta["session_id"]
self.web_url = self.meta["url"]
self.api_token = self.meta["token"]
self.pin = self.meta["pin"]
def _start_trigger_service(self):
self.trigger_port = port_for.select_random()
self.trigger_token = secrets.token_urlsafe(20)
app = Flask(__name__)
@app.route("/", methods=["POST"])
def trigger():
json = request.json
if json.get("token", "") == self.trigger_token:
self._trigger()
return "Successful triggered"
else:
return abort(403)
self.trigger_thread = Process(
target=lambda: app.run("0.0.0.0", port=self.trigger_port)
)
self.trigger_thread.start()
def _trigger(self):
"""Event triggered by Django."""
print("Triggered")
self.pull()
def pull(self):
"""Update status: Get status from Django."""
pass
def push(self):
"""Update status: Push status to Django."""
pass
def stop(self):
"""Stop session and clean up."""
# Kill VNC
if self.vnc_pid in psutil.pids():
print("Kill VNC.")
os.kill(self.vnc_pid, signal.SIGTERM)
# Kill websockify
if self.ws_pid in psutil.pids():
print("Kill websockify.")
os.kill(self.ws_pid, signal.SIGTERM)
# Delete PW file
if os.path.exists(self.pw_filename):
print("Delete password file")
os.remove(self.pw_filename)
if hasattr(self, "trigger_thread"):
print("Kill trigger service.")
self.trigger_thread.terminate()
self.push()
# Delete self
del self
@property
def vnc_process_running(self):
"""Check if the VNC process is still running."""
if self.vnc_pid in psutil.pids():
p = psutil.Process(self.vnc_pid)
if p.status() == "zombie":
return False
return True
return False
@property
def client_meta(self):
return {"id": self.pid, "url": self.web_url, "pin": self.pin}
@property
def status(self):
return {"id": self.pid, "status": self.STATUS_RUNNING}
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