import eventlet
eventlet.monkey_patch()

import os
import socket
from flask import Flask, render_template, request, Response, send_file
from flask import make_response
from flask_socketio import SocketIO
from OpenSSL import SSL, crypto

'''
requirements.txt
cffi==1.9.1
click==6.6
cryptography==1.7.1
enum-compat==0.0.2
eventlet==0.20.1
Flask==0.12
Flask-SocketIO==2.8.2
greenlet==0.4.11
idna==2.2
itsdangerous==0.24
Jinja2==2.8.1
MarkupSafe==0.23
pyasn1==0.1.9
pycparser==2.17
pyOpenSSL==16.2.0
python-engineio==1.1.0
python-socketio==1.6.2
six==1.10.0
Werkzeug==0.11.15
'''

app = Flask(__name__)
app.config['SECRET_KEY'] = 'secret!'
async_mode = None
socketio = SocketIO(app, async_mode=async_mode)
def create_self_signed_cert(certfile, keyfile, certargs, cert_dir="."):
    C_F = os.path.join(cert_dir, certfile)
    K_F = os.path.join(cert_dir, keyfile)
    if not os.path.exists(C_F) or not os.path.exists(K_F):
        k = crypto.PKey()
        k.generate_key(crypto.TYPE_RSA, 1024)
        cert = crypto.X509()
        cert.get_subject().C = certargs["Country"]
        cert.get_subject().ST = certargs["State"]
        cert.get_subject().L = certargs["City"]
        cert.get_subject().O = certargs["Organization"]
        cert.get_subject().OU = certargs["Org. Unit"]
        cert.get_subject().CN = 'Example'
        cert.set_serial_number(1000)
        cert.gmtime_adj_notBefore(0)
        cert.gmtime_adj_notAfter(315360000)
        cert.set_issuer(cert.get_subject())
        cert.set_pubkey(k)
        cert.sign(k, 'sha1')
        open(C_F, "wb").write(crypto.dump_certificate(crypto.FILETYPE_PEM, cert))
        open(K_F, "wb").write(crypto.dump_privatekey(crypto.FILETYPE_PEM, k))

CERT_FILE = "cert.pem"
KEY_FILE = "key.pem"
create_self_signed_cert(CERT_FILE, KEY_FILE,
                            certargs=
                            {"Country": "US",
                             "State": "NY",
                             "City": "Ithaca",
                             "Organization": "Python-Bugs",
                             "Org. Unit": "Proof of Concept"})
socketio.run(app, debug=True, use_reloader=False, certfile=CERT_FILE, keyfile=KEY_FILE, port=5500)