capsul-flask/capsulflask/__init__.py

import logging 
from logging.config import dictConfig as logging_dict_config

import os
import hashlib

import stripe
from dotenv import load_dotenv, find_dotenv
from flask import Flask
from flask_mail import Mail
from flask import render_template
from flask import url_for
from flask import current_app

from capsulflask import operation_model, cli
from capsulflask.btcpay import client as btcpay

load_dotenv(find_dotenv())

app = Flask(__name__)

app.config.from_mapping(
  BASE_URL=os.environ.get("BASE_URL", default="http://localhost:5000"),
  SECRET_KEY=os.environ.get("SECRET_KEY", default="dev"),
  OPERATION_MODEL=os.environ.get("OPERATION_MODEL", default="mock"),
  LOG_LEVEL=os.environ.get("LOG_LEVEL", default="INFO"),
  ADMIN_EMAIL_ADDRESSES=os.environ.get("ADMIN_EMAIL_ADDRESSES", default="ops@cyberia.club"),

  DATABASE_URL=os.environ.get("DATABASE_URL", default="sql://postgres:dev@localhost:5432/postgres"),
  DATABASE_SCHEMA=os.environ.get("DATABASE_SCHEMA", default="public"),

  MAIL_SERVER=os.environ.get("MAIL_SERVER", default="m1.nullhex.com"),
  MAIL_PORT=os.environ.get("MAIL_PORT", default="587"),
  MAIL_USE_TLS=os.environ.get("MAIL_USE_TLS", default="True").lower() in ['true', '1', 't', 'y', 'yes'],
  MAIL_USERNAME=os.environ.get("MAIL_USERNAME", default="forest@nullhex.com"),
  MAIL_PASSWORD=os.environ.get("MAIL_PASSWORD", default=""),
  MAIL_DEFAULT_SENDER=os.environ.get("MAIL_DEFAULT_SENDER", default="forest@nullhex.com"),

  PROMETHEUS_URL=os.environ.get("PROMETHEUS_URL", default="https://prometheus.cyberia.club"),

  STRIPE_API_VERSION=os.environ.get("STRIPE_API_VERSION", default="2020-03-02"),
  STRIPE_SECRET_KEY=os.environ.get("STRIPE_SECRET_KEY", default=""),
  STRIPE_PUBLISHABLE_KEY=os.environ.get("STRIPE_PUBLISHABLE_KEY", default=""),
  #STRIPE_WEBHOOK_SECRET=os.environ.get("STRIPE_WEBHOOK_SECRET", default="")

  BTCPAY_PRIVATE_KEY=os.environ.get("BTCPAY_PRIVATE_KEY", default="").replace("\\n", "\n"),
  BTCPAY_URL=os.environ.get("BTCPAY_URL", default="https://btcpay.cyberia.club")
)

logging_dict_config({
  'version': 1,
  'formatters': {'default': {
    'format': '[%(asctime)s] %(levelname)s in %(module)s: %(message)s',
  }},
  'handlers': {'wsgi': {
    'class': 'logging.StreamHandler',
    'stream': 'ext://flask.logging.wsgi_errors_stream',
    'formatter': 'default'
  }},
  'root': {
    'level': app.config['LOG_LEVEL'],
    'handlers': ['wsgi']
  }
})

# app.logger.critical("critical")
# app.logger.error("error")
# app.logger.warning("warning")
# app.logger.info("info")
# app.logger.debug("debug")

stripe.api_key = app.config['STRIPE_SECRET_KEY']
stripe.api_version = app.config['STRIPE_API_VERSION']

app.config['FLASK_MAIL_INSTANCE'] = Mail(app)

if app.config['OPERATION_MODEL'] == "shell_scripts":
  app.config['OPERATION_MODEL'] = operation_model.GoshtOperation()
else:
  app.config['OPERATION_MODEL'] = operation_model.MockOperation()

app.config['BTCPAY_CLIENT'] = btcpay.Client(api_uri=app.config['BTCPAY_URL'], pem=app.config['BTCPAY_PRIVATE_KEY'])

from capsulflask import db

db.init_app(app)

from capsulflask import auth, landing, console, payment, metrics, cli

app.register_blueprint(landing.bp)
app.register_blueprint(auth.bp)
app.register_blueprint(console.bp)
app.register_blueprint(payment.bp)
app.register_blueprint(metrics.bp)
app.register_blueprint(cli.bp)

app.add_url_rule("/", endpoint="index")

@app.after_request
def security_headers(response):
  response.headers['X-Frame-Options'] = 'SAMEORIGIN'
  if 'Content-Security-Policy' not in response.headers:
    response.headers['Content-Security-Policy'] = "default-src 'self'"
  response.headers['X-Content-Type-Options'] = 'nosniff'
  return response


@app.context_processor
def override_url_for():
  """
  override the url_for function built into flask 
  with our own custom implementation that busts the cache correctly when files change 
  """
  return dict(url_for=url_for_with_cache_bust)



def url_for_with_cache_bust(endpoint, **values):
  """
  Add a query parameter based on the hash of the file, this acts as a cache bust
  """
  
  if endpoint == 'static':
    filename = values.get('filename', None)
    if filename:
      if 'STATIC_FILE_HASH_CACHE' not in current_app.config:
        current_app.config['STATIC_FILE_HASH_CACHE'] = dict()
      
      if filename not in current_app.config['STATIC_FILE_HASH_CACHE']:
        filepath = os.path.join(current_app.root_path, endpoint, filename)
        #print(filepath)
        if os.path.isfile(filepath) and os.access(filepath, os.R_OK):
          
          with open(filepath, 'rb') as file:
            hasher = hashlib.md5()
            hasher.update(file.read())
            current_app.config['STATIC_FILE_HASH_CACHE'][filename] = hasher.hexdigest()[-6:]
            
      values['q'] = current_app.config['STATIC_FILE_HASH_CACHE'][filename]

  return url_for(endpoint, **values)